* This file is part of the public release of Spin. It is subject to the

/***** spin: pangen1.h *****/

/*
* This file is part of the public release of Spin. It is subject to the
* terms in the LICENSE file that is included in this source directory.
* Tool documentation is available at http://spinroot.com
*/

static const char *Code2a[] = { /* the tail of procedure run() */
" if (state_tables)",
" { if (dodot) exit(0);",
" printf(\"\\nTransition Type: \");",
" printf(\"A=atomic; D=d_step; L=local; G=global\\n\");",
" printf(\"Source-State Labels: \");",
" printf(\"p=progress; e=end; a=accept;\\n\");",
"#ifdef MERGED",
" printf(\"Note: statement merging was used. Only the first\\n\");",
" printf(\" stmnt executed in each merge sequence is shown\\n\");",
" printf(\" (use spin -a -o3 to disable statement merging)\\n\");",
"#endif",
" pan_exit(0);",
" }",
"#if defined(BFS) && defined(TRIX)", /* before iniglobals */
" { int i;",
" for (i = 0; i < MAXPROC+1; i++)",
" { processes[i] = (TRIX_v6 *) emalloc(sizeof(TRIX_v6));",
" processes[i]->body = (uchar *) emalloc(Maxbody * sizeof(char));",
" }",
" for (i = 0; i < MAXQ+1; i++)",
" { channels[i] = (TRIX_v6 *) emalloc(sizeof(TRIX_v6));",
" channels[i]->body = (uchar *) emalloc(Maxbody * sizeof(char));",
" } }",
"#endif",
"#ifdef BFS_PAR",
" bfs_setup_mem();",
" #ifdef COLLAPSE",
" /* this must be the very first allocation from the shared heap */",
" #ifdef BFS_SEP_HASH",
" ncomps = (ulong *) emalloc((ulong)((256+2) * sizeof(ulong)));",
" #else",
" ncomps = (ulong *) sh_pre_malloc((ulong)((256+2) * sizeof(ulong)));",
" #endif",
" #endif",
"#endif",
" iniglobals(258); /* arg outside range of pids */",
"#if defined(VERI) && !defined(NOREDUCE) && !defined(NP) && !defined(BFS) && !defined(HAS_LTL)",
" if (!state_tables",
" #ifdef HAS_CODE",
" && !readtrail",
" #endif",
" #if NCORE>1",
" && core_id == 0",
" #endif",
" )",
" { printf(\"warning: for p.o. reduction to be valid \");",
" printf(\"the never claim must be stutter-invariant\\n\");",
" printf(\"(never claims generated from LTL \");",
" printf(\"formulae are stutter-invariant)\\n\");",
" }",
"#endif",
" UnBlock; /* disable rendez-vous */",
"#ifdef BITSTATE",
" sinit();",
"#else",
" hinit();",
"#endif",
"#if defined(FULLSTACK) && defined(BITSTATE)",
" onstack_init();",
"#endif",
"#if defined(CNTRSTACK) && !defined(BFS)",
" LL = (uchar *) emalloc(ONE_L<<(ssize-3));",
"#endif",
" stack = (_Stack *) emalloc(sizeof(_Stack));",
" svtack = (Svtack *) emalloc(sizeof(Svtack));",
" /* a place to point for Pptr of non-running procs: */",
" noqptr = noptr = (uchar *) emalloc(Maxbody * sizeof(char));",
"#if defined(SVDUMP) && defined(VERBOSE)",
" if (vprefix > 0)",
" (void) write(svfd, (uchar *) &vprefix, sizeof(int));",
"#endif",
"#ifdef VERI",
" Addproc(VERI,1); /* pid = 0, priority 1 */",
" #if NCLAIMS>1",
" if (claimname != NULL)",
" { whichclaim = find_claim(claimname);",
" select_claim(whichclaim);",
" }",
" #endif",
"#endif",
" active_procs(); /* started after never */",
"#ifdef EVENT_TRACE",
" now._event = start_event;",
" reached[EVENT_TRACE][start_event] = 1;",
"#endif",

"#ifdef HAS_CODE",
" globinit();",
"#endif",
"#ifdef BITSTATE",
"go_again:",
"#endif",
" do_the_search();",
"#ifdef BITSTATE",
" if (--Nrun > 0 && HASH_CONST[++HASH_NR])", /* last entry is 0 */
" { printf(\"Run %%d:\\n\", HASH_NR);",
" wrap_stats();",
" printf(\"\\n\");",
" if (udmem) /* Dillinger 3/2/09 */",
" { memset(SS, 0, udmem);",
" } else",
" { memset(SS, 0, ONE_L<<(ssize-3));",
" }",
"#ifdef CNTRSTACK",
" memset(LL, 0, ONE_L<<(ssize-3));",
"#endif",
"#ifdef FULLSTACK",
" memset((uchar *) S_Tab, 0, ",
" maxdepth*sizeof(H_el *));",
"#endif",
" nstates=nlinks=truncs=truncs2=ngrabs = 0;",
" nlost=nShadow=hcmp = 0;",
" Fa=Fh=Zh=Zn = 0;",
" PUT=PROBE=ZAPS=Ccheck=Cholds = 0;",
" goto go_again;",
" }",
"#endif",
"}",
"#ifdef HAS_PRIORITY",
"extern int highest_priority(int, short, Trans *);",
"extern int get_priority(int);",
"extern int set_priority(int, int);",
"#endif",
"#ifdef SPIN_HEAP",
"void *",
"spin_malloc(int n) /* reserved for use by Modex generated models */",
"{ char *spin_heap_ptr = &(now.spin_heap[now.spin_heap_n]);",
" if (now.spin_heap_n + n >= sizeof(now.spin_heap))",
" { Uerror(\"spin_heap limit reached\");",
" }",
" now.spin_heap_n += n;",
" return spin_heap_ptr;",
"}",
"void",
"spin_free(void *unused)",
"{ unused; /* ignore */",
"}",
"#endif",
"int",
"spin_join(int p, void **unused)",
"{ /* fprintf(stderr, \"join %%d when %%d\\n \", p, now._nr_pr); */",
" return (now._nr_pr <= p); /* process *p has stopped */",
"}",
"",
"int",
"spin_mutex_free(int *m)",
"{ return (*m == 0);",
"}",
"",
"int",
"spin_mutex_lock(int *m)",
"{ *m = 1;",
" return 1;",
"}",
"void",
"spin_mutex_destroy(int *m)",
"{ *m = 0;",
"}",
"void",
"spin_mutex_unlock(int *m)",
"{ *m = 0;",
"}",
"void",
"spin_mutex_init(int *m, void *val)",
"{",
" if (!val)", /* the 2nd arg must be NULL, for now */
" { *m = 0;",
" } else",
" { Uerror(\"pthread_mutex_init: unsupported non-default init\");",
" }",
"}",
"",
"int",
"spin_cond_wait(int *cond, int *lck)", /*release and re-acquire lock *lck */
"{ /* this version does not scale very far alas */",
" if (((P0 *)this)->_pid + 1 >= WS*8)", /* 32 or 64 */
" { Uerror(\"pid exceeds range supported by pthread_cond_wait\");",
" }",
" if (((*cond)&1) == 0)", /* repeatedly tested, so: */
" { spin_mutex_unlock(lck);", /* avoid double counting */
" *cond |= (1<<(((P0 *)this)->_pid + 1));",
" return 0;", /* blocked, must test again */
" } else",
" { /* if other processes are already waiting */",
" /* while our wait flag is 0, then they should go first */",
" if (((*cond)&(~(1 | (1<<(((P0 *)this)->_pid + 1))))) != 0)",
" { spin_mutex_unlock(lck);",
" return 0;", /* wait for the others to go first */
" }",
" *cond &= ~1;", /* clear the 'go' bit andy wait flag */
" *cond &= ~(1<<(((P0 *)this)->_pid + 1));",
" return 1;", /* okay to proceed */
" }",
"}",
"void",
"spin_cond_signal(int *cond)",
"{",
" if ( ((*cond)&(~1)) != 0 )", /* procs are waiting */
" { *cond |= 1;", /* set the 'go' bit */
" }",
"}",
"",
"#ifdef HAS_PROVIDED",
" int provided(int, uchar, int, Trans *);",
"#endif",
"#ifdef BFS_PAR",
" extern void bfs_shutdown(const char *);",
"#endif",
"",
"#if NCORE>1",
" #define GLOBAL_LOCK (0)",
" #ifndef CS_N",
" #define CS_N (256*NCORE)", /* must be a power of 2 */
" #endif",

" #ifdef NGQ", /* no global queue */
" #define NR_QS (NCORE)",
" #define CS_NR (CS_N+1) /* 2^N + 1, nr critical sections */",
" #define GQ_RD GLOBAL_LOCK", /* not really used in this mode */
" #define GQ_WR GLOBAL_LOCK", /* but just in case... */
" #define CS_ID (1 + (int) (j1_spin & (CS_N-1))) /* mask: 2^N - 1, zero reserved */",
" #define QLOCK(n) (1+n)", /* overlaps first n zones of hashtable */
" #else",
" #define NR_QS (NCORE+1)", /* add a global queue */
" #define CS_NR (CS_N+3)", /* 2 extra locks for global q */
" #define GQ_RD (1)", /* read access to global q */
" #define GQ_WR (2)", /* write access to global q */
" #define CS_ID (3 + (int) (j1_spin & (CS_N-1)))",
" #define QLOCK(n) (3+n)",/* overlaps first n zones of hashtable */
" #endif",
"",
" #ifndef SEP_STATE",
" #define enter_critical(w) e_critical(w)",
" #define leave_critical(w) x_critical(w)",
" #else",
" #ifdef NGQ",
" #define enter_critical(w) { if (w < 1+NCORE) e_critical(w); }",
" #define leave_critical(w) { if (w < 1+NCORE) x_critical(w); }",
" #else",
" #define enter_critical(w) { if (w < 3+NCORE) e_critical(w); }",
" #define leave_critical(w) { if (w < 3+NCORE) x_critical(w); }",
" #endif",
" #endif",
"",
" int",
" cpu_printf(const char *fmt, ...)", /* only used with VERBOSE/CHECK/DEBUG */
" { va_list args;",
" enter_critical(GLOBAL_LOCK); /* printing */",
" printf(\"cpu%%d: \", core_id);",
" fflush(stdout);",
" va_start(args, fmt);",
" vprintf(fmt, args);",
" va_end(args);",
" fflush(stdout);",
" leave_critical(GLOBAL_LOCK);",
" return 1;",
" }",
"#else",
" #define enter_critical(w) /* none */",
" #define leave_critical(w) /* none */",
"",
" int",
" cpu_printf(const char *fmt, ...)",
" { va_list args;",
" va_start(args, fmt);",
" vprintf(fmt, args);",
" va_end(args);",
" return 1;",
" }",
"#endif",

#ifndef PRINTF
"int",
"Printf(const char *fmt, ...)",
"{ /* Make sure the args to Printf",
" * are always evaluated (e.g., they",
" * could contain a run stmnt)",
" * but do not generate the output",
" * during verification runs",
" * unless explicitly wanted",
" * If this fails on your system",
" * compile SPIN itself -DPRINTF",
" * and this code is not generated",
" */",
"#ifdef HAS_CODE",
" if (readtrail)",
" { va_list args;",
" va_start(args, fmt);",
" vprintf(fmt, args);",
" va_end(args);",
" return 1;",
" }",
"#endif",
"#ifdef PRINTF",
" va_list args;",
" va_start(args, fmt);",
" vprintf(fmt, args);",
" va_end(args);",
"#endif",
" return 1;",
"}",
#endif
"extern void printm(int);",

"#ifndef SC",
"#define getframe(i) &trail[i];",
"#else",
"static long HHH, DDD, hiwater;",
"static long CNT1, CNT2;",
"static int stackwrite;",
"static int stackread;",
"static Trail frameptr;",
"Trail *",
"getframe(long d)",
"{",
" if (CNT1 == CNT2)",
" return &trail[d];",
"",
" if (d >= (CNT1-CNT2)*DDD)",
" return &trail[d - (CNT1-CNT2)*DDD];",
"",
" if (!stackread",
" && (stackread = open(stackfile, 0)) < 0)",
" { printf(\"getframe: cannot open %%s\\n\", stackfile);",
" wrapup();",
" }",
" if (lseek(stackread, d* (off_t) sizeof(Trail), SEEK_SET) == -1",
" || read(stackread, &frameptr, sizeof(Trail)) != sizeof(Trail))",
" { printf(\"getframe: frame read error\\n\");",
" wrapup();",
" }",
" return &frameptr;",
"}",
"#endif",
"#if NCORE>1",
"extern void cleanup_shm(int);",
"volatile uint *search_terminated; /* to signal early termination */",
/*
* Meaning of bitflags in search_terminated:
* 1 set by pan_exit
* 2 set by wrapup
* 4 set by uerror
* 8 set by sudden_stop -- called after someone_crashed and [Uu]error
* 16 set by cleanup_shm
* 32 set by give_up -- called on signal
* 64 set by proxy_exit
* 128 set by proxy on write port failure
* 256 set by proxy on someone_crashed
*
* Flags 8|32|128|256 indicate abnormal termination
*
* The flags are checked in 4 functions in the code:
* sudden_stop()
* someone_crashed() (proxy and pan version)
* mem_hand_off()
*/
"#endif",
"void",
"pan_exit(int val)",
"{ void stop_timer(int);",
"#ifdef BFS_PAR",
" extern void bfs_mark_done(int);",
" extern void bfs_drop_shared_memory(void);",
"#endif",
" if (signoff)",
" { printf(\"--end of output--\\n\");",
" }",
"#if NCORE>1",
" if (search_terminated != NULL)",
" { *search_terminated |= 1; /* pan_exit */",
" }",
"#ifdef USE_DISK",
" { void dsk_stats(void);",
" dsk_stats();",
" }",
"#endif",
" if (!state_tables && !readtrail)",
" { cleanup_shm(1);",
" }",
"#endif",
"#ifdef BFS_PAR",
" if (who_am_i != 0)",
" { bfs_mark_done(3); /* stopped */",
" }",
" bfs_drop_shared_memory();",
"#endif",
" if (val == 2)",
" { val = 0;",
" }",
"#ifdef BFS_PAR",
" if (who_am_i == 0)",
"#endif",
" stop_timer(1);",
"",
"#ifdef C_EXIT",
" C_EXIT; /* trust that it defines a fct */",
"#endif",
" exit(val);",
"}",
"#ifdef HAS_CODE",
"static char tbuf[2][2048];",
"",
"char *",
"transmognify(char *s)",
"{ char *v, *w;",
" int i, toggle = 0;",
" if (!s || strlen(s) > 2047) return s;",
" memset(tbuf[0], 0, 2048);",
" memset(tbuf[1], 0, 2048);",
" strcpy(tbuf[toggle], s);",
" while ((v = strstr(tbuf[toggle], \"{c_code\")))", /* assign v */
" { *v = '\\0'; v++;",
" strcpy(tbuf[1-toggle], tbuf[toggle]);",
" for (w = v; *w != '}' && *w != '\\0'; w++) /* skip */;",
" if (*w != '}') return s;",
" *w = '\\0'; w++;",
" for (i = 0; code_lookup[i].c; i++)",
" if (strcmp(v, code_lookup[i].c) == 0",
" && strlen(v) == strlen(code_lookup[i].c))",
" { if (strlen(tbuf[1-toggle])",
" + strlen(code_lookup[i].t)",
" + strlen(w) > 2047)",
" return s;",
" strcat(tbuf[1-toggle], code_lookup[i].t);",
" break;",
" }",
" strcat(tbuf[1-toggle], w);",
" toggle = 1 - toggle;",
" }",
" tbuf[toggle][2047] = '\\0';",
" return tbuf[toggle];",
"}",
"#else",
"char * transmognify(char *s) { return s; }",
"#endif",

"#ifdef HAS_CODE",
"void",
"add_src_txt(int ot, int tt)",
"{ Trans *t;",
" char *q;",
"",
" for (t = trans[ot][tt]; t; t = t->nxt)",
" { printf(\"\\t\\t\");",
" q = transmognify(t->tp);",
" for ( ; q && *q; q++)",
" if (*q == '\\n')",
" printf(\"\\\\n\");",
" else",
" putchar(*q);",
" printf(\"\\n\");",
" }",
"}",
"",
"char *",
"find_source(int tp, int s)",
"{",
" if (s >= flref[tp]->from",
" && s <= flref[tp]->upto)",
" { return flref[tp]->fnm;",
" }",
" return PanSource; /* i.e., don't know */",
"}",
"",
"void",
"wrap_trail(void)",
"{ static int wrap_in_progress = 0;",
" int i; short II;",
" P0 *z;",
"",
" if (wrap_in_progress++) return;",
"",
" printf(\"spin: trail ends after %%ld steps\\n\", depth);",
" if (onlyproc >= 0)",
" { if (onlyproc >= now._nr_pr) { pan_exit(0); }",
" II = onlyproc;",
" z = (P0 *)pptr(II);",
" printf(\"%%3ld:\tproc %%d (%%s) \",",
" depth, II, procname[z->_t]);",
" for (i = 0; src_all[i].src; i++)",
" if (src_all[i].tp == (int) z->_t)",
" { printf(\" %%s:%%d\",",
" find_source((int) z->_t, (int) z->_p),",
" src_all[i].src[z->_p]);",
" break;",
" }",
" printf(\" (state %%2d)\", z->_p);",
" if (!stopstate[z->_t][z->_p])",
" printf(\" (invalid end state)\");",
" printf(\"\\n\");",
" add_src_txt(z->_t, z->_p);",
" pan_exit(0);",
" }",
" printf(\"#processes %%d:\\n\", now._nr_pr);",
" if (depth < 0) depth = 0;",
" for (II = 0; II < now._nr_pr; II++)",
" { z = (P0 *)pptr(II);",
" printf(\"%%3ld:\tproc %%d (%%s) \",",
" depth, II, procname[z->_t]);",
" for (i = 0; src_all[i].src; i++)",
" if (src_all[i].tp == (int) z->_t)",
" { printf(\" %%s:%%d\",",
" find_source((int) z->_t, (int) z->_p),",
" src_all[i].src[z->_p]);",
" break;",
" }",
" printf(\" (state %%2d)\", z->_p);",
" if (!stopstate[z->_t][z->_p])",
" printf(\" (invalid end state)\");",
" printf(\"\\n\");",
" add_src_txt(z->_t, z->_p);",
" }",
" c_globals();",
" for (II = 0; II < now._nr_pr; II++)",
" { z = (P0 *)pptr(II);",
" c_locals(II, z->_t);",
" }",
"#ifdef ON_EXIT",
" ON_EXIT;",
"#endif",
" pan_exit(0);",
"}",
"FILE *",
"findtrail(void)",
"{ FILE *fd;",
" char fnm[512], *q;",
" char MyFile[512];", /* avoid using a non-writable string */
" char MySuffix[16];",
" int try_core;",
" int candidate_files;",
"",
" if (trailfilename != NULL)",
" { fd = fopen(trailfilename, \"r\");",
" if (fd == NULL)",
" { printf(\"pan: cannot find %%s\\n\", trailfilename);",
" pan_exit(1);",
" } /* else */",
" goto success;",
" }",
"talk:",
" try_core = 1;",
" candidate_files = 0;",
" tprefix = \"trail\";",
" strcpy(MyFile, TrailFile);",
" do { /* see if there's more than one possible trailfile */",
" if (whichtrail)",
" { sprintf(fnm, \"%%s%%d.%%s\",",
" MyFile, whichtrail, tprefix);",
" fd = fopen(fnm, \"r\");",
" if (fd != NULL)",
" { candidate_files++;",
" if (verbose==100)",
" printf(\"trail%%d: %%s\\n\",",
" candidate_files, fnm);",
" fclose(fd);",
" }",
" if ((q = strchr(MyFile, \'.\')) != NULL)",
" { *q = \'\\0\';", /* e.g., strip .pml */
" sprintf(fnm, \"%%s%%d.%%s\",",
" MyFile, whichtrail, tprefix);",
" *q = \'.\';",
" fd = fopen(fnm, \"r\");",
" if (fd != NULL)",
" { candidate_files++;",
" if (verbose==100)",
" printf(\"trail%%d: %%s\\n\",",
" candidate_files, fnm);",
" fclose(fd);",
" } }",
" } else",
" { sprintf(fnm, \"%%s.%%s\", MyFile, tprefix);",
" fd = fopen(fnm, \"r\");",
" if (fd != NULL)",
" { candidate_files++;",
" if (verbose==100)",
" printf(\"trail%%d: %%s\\n\",",
" candidate_files, fnm);",
" fclose(fd);",
" }",
" if ((q = strchr(MyFile, \'.\')) != NULL)",
" { *q = \'\\0\';", /* e.g., strip .pml */
" sprintf(fnm, \"%%s.%%s\", MyFile, tprefix);",
" *q = \'.\';",
" fd = fopen(fnm, \"r\");",
" if (fd != NULL)",
" { candidate_files++;",
" if (verbose==100)",
" printf(\"trail%%d: %%s\\n\",",
" candidate_files, fnm);",
" fclose(fd);",
" } } }",
" tprefix = MySuffix;",
" sprintf(tprefix, \"cpu%%d_trail\", try_core++);",
" } while (try_core <= NCORE);",
"",
" if (candidate_files != 1)",
" { if (verbose != 100)",
" { printf(\"error: there are %%d trail files:\\n\",",
" candidate_files);",
" verbose = 100;",
" goto talk;",
" } else",
" { printf(\"pan: rm or mv all except one\\n\");",
" exit(1);",
" } }",

" try_core = 1;",
" strcpy(MyFile, TrailFile); /* restore */",
" tprefix = \"trail\";",
"try_again:",
" if (whichtrail)",
" { sprintf(fnm, \"%%s%%d.%%s\", MyFile, whichtrail, tprefix);",
" fd = fopen(fnm, \"r\");",
" if (fd == NULL && (q = strchr(MyFile, \'.\')))",
" { *q = \'\\0\';", /* e.g., strip .pml on original file */
" sprintf(fnm, \"%%s%%d.%%s\",",
" MyFile, whichtrail, tprefix);",
" *q = \'.\';",
" fd = fopen(fnm, \"r\");",
" }",
" } else",
" { sprintf(fnm, \"%%s.%%s\", MyFile, tprefix);",
" fd = fopen(fnm, \"r\");",
" if (fd == NULL && (q = strchr(MyFile, \'.\')))",
" { *q = \'\\0\';", /* e.g., strip .pml on original file */
" sprintf(fnm, \"%%s.%%s\", MyFile, tprefix);",
" *q = \'.\';",
" fd = fopen(fnm, \"r\");",
" } }",
" if (fd == NULL)",
" { if (try_core < NCORE)",
" { tprefix = MySuffix;",
" sprintf(tprefix, \"cpu%%d_trail\", try_core++);",
" goto try_again;",
" }",
" printf(\"pan: cannot find trailfile %%s\\n\", fnm);",
" pan_exit(1);",
" }",
"success:",
"#if NCORE>1 && defined(SEP_STATE)",
" { void set_root(void); /* for partial traces from local root */",
" set_root();",
" }",
"#endif",
" return fd;",
"}",
"",
"uchar do_transit(Trans *, short);",
"#ifdef PERMUTED",
"void set_permuted(int);",
"void set_reversed(int);",
"void set_rotated(int);",
"void set_randrot(int);",
"void (*p_reorder)(int) = set_permuted;",
"short p_rotate;",
"#endif",
"",
"void",
"getrail(void)",
"{ FILE *fd;",
" char *q, *pnm;",
" int i, t_id, lastnever = -1; short II;",
" Trans *t;",
" P0 *z;",
"#ifdef PERMUTED",
" char sbuf[128];",
" memset(sbuf, 0, sizeof(sbuf));",
"#endif",
" fd = findtrail(); /* exits if unsuccessful */",
" while (fscanf(fd, \"%%ld:%%d:%%d\\n\", &depth, &i, &t_id) == 3)",
" { if (depth == -1)",
" { printf(\"<<<<<START OF CYCLE>>>>>\\n\");",
" }",
"#ifdef PERMUTED",
" if (depth < 0)",
" { switch (depth) {",
" case -5:",
" if (i && !t_reverse)",
" { strcat(sbuf, \"-t_reverse \");",
" }",
" break;",
" case -6:",
" if (i && p_reorder != set_permuted)",
" { strcat(sbuf, \"-p_permute \");",
" } else",
" if (t_id && p_reorder != set_reversed)",
" { strcat(sbuf, \"-p_reverse \");",
" }",
" break;",
" case -7:",
" if (i",
" && (p_reorder != set_rotated || p_rotate != t_id))",
" { char tmp[32];",
" sprintf(tmp, \"-p_rotate%%d \", t_id);",
" strcat(sbuf, tmp);",
" }",
" break;",
" case -8:",
" if (i && p_reorder != set_randrot)",
" { strcat(sbuf, \"-p_randrot \");",
" }",
" if (s_rand != ++t_id)",
" { char tmp[32];",
" sprintf(tmp, \"-RS%%u \", (uint) t_id-1);",
" strcat(sbuf, tmp);",
" }",
" break;",
" default:",
" continue;",
" }",
" }",
"#endif",
" if (depth < 0)",
" { continue;",
" }",
"#ifdef PERMUTED",
" if (strlen(sbuf) > 0)",
" { fprintf(efd, \"add: %%s\\n\", sbuf);",
" exit(1);",
" }",
"#endif",
" if (i > now._nr_pr)",
" { printf(\"pan: Error, proc %%d invalid pid \", i);",
" printf(\"transition %%d\\n\", t_id);",
" break;",
" }",
" II = i;",
" z = (P0 *)pptr(II);",
" for (t = trans[z->_t][z->_p]; t; t = t->nxt)",
" if (t->t_id == (T_ID) t_id)",
" break;",
" if (!t)",
" { for (i = 0; i < NrStates[z->_t]; i++)",
" { t = trans[z->_t][i];",
" if (t && t->t_id == (T_ID) t_id)",
" { printf(\"\\tRecovered at state %%d\\n\", i);",
" z->_p = i;",
" goto recovered;",
" } }",
" printf(\"pan: Error, proc %%d type %%d state %%d: \",",
" II, z->_t, z->_p);",
" printf(\"transition %%d not found\\n\", t_id);",
" printf(\"pan: list of possible transitions in this process:\\n\");",
" if (z->_t >= 0 && z->_t <= _NP_)",
" for (t = trans[z->_t][z->_p]; t; t = t->nxt)",
" printf(\" t_id %%d -- case %%d, [%%s]\\n\",",
" t->t_id, t->forw, t->tp);",
" break; /* pan_exit(1); */",
" }",
"recovered:",
" q = transmognify(t->tp);",
" if (gui) simvals[0] = \'\\0\';",

" pnm = procname[z->_t];",
" this = pptr(II);",
" trpt->tau |= 1;", /* timeout always possible */
" if (!do_transit(t, II))",
" { if (onlyproc >= 0 && II != onlyproc)",
" goto moveon;",
" if (!verbose) break;",
" printf(\"pan: error, next transition UNEXECUTABLE on replay\\n\");",
" printf(\" most likely causes: missing c_track statements\\n\");",
" printf(\" or illegal side-effects in c_expr statements\\n\");",
" }",

" if (onlyproc >= 0 && II != onlyproc)",
" goto moveon;",

" if (verbose)",
" { printf(\"%%3ld: proc %%2d (%%s) \", depth, II, pnm);",

" for (i = 0; src_all[i].src; i++)",
" if (src_all[i].tp == (int) z->_t)",
" { printf(\" %%s:%%d \",",
" find_source((int) z->_t, (int) z->_p),",
" src_all[i].src[z->_p]);",
" break;",
" }",

" printf(\"(state %%d) trans {%%d,%%d} [%%s]\\n\",",
" z->_p, t_id, t->forw, q?q:\"\");",

" c_globals();",
" for (i = 0; i < now._nr_pr; i++)",
" { c_locals(i, ((P0 *)pptr(i))->_t);",
" }",
" } else if (Btypes[z->_t] == N_CLAIM)",
" { if (lastnever != (int) z->_p)",
" { for (i = 0; src_all[i].src; i++)",
" if (src_all[i].tp == (int) z->_t)",
" { printf(\"MSC: ~G %%d\\n\",",
" src_all[i].src[z->_p]);",
" break;",
" }",
" if (!src_all[i].src)",
" printf(\"MSC: ~R %%d\\n\", z->_p);",
" }",
" lastnever = z->_p;",
" goto sameas;",
" } else if (Btypes[z->_t] != 0) /* not :np_: */",
" {",
"sameas: if (no_rck) goto moveon;",
" if (coltrace)",
" { printf(\"%%ld: \", depth);",
" for (i = 0; i < II; i++)",
" printf(\"\\t\\t\");",
" printf(\"%%s(%%d):\", pnm, II);",
" printf(\"[%%s]\\n\", q?q:\"\");",
" } else if (!silent)",
" { if (strlen(simvals) > 0) {",
" printf(\"%%3ld: proc %%2d (%%s)\", ",
" depth, II, pnm);",
" for (i = 0; src_all[i].src; i++)",
" if (src_all[i].tp == (int) z->_t)",
" { printf(\" %%s:%%d \",",
" find_source((int) z->_t, (int) z->_p),",
" src_all[i].src[z->_p]);",
" break;",
" }",
" printf(\"(state %%d)\t[values: %%s]\\n\", z->_p, simvals);",
" }",
" printf(\"%%3ld: proc %%2d (%%s)\", ",
" depth, II, pnm);",
" for (i = 0; src_all[i].src; i++)",
" if (src_all[i].tp == (int) z->_t)",
" { printf(\" %%s:%%d \",",
" find_source((int) z->_t, (int) z->_p),",
" src_all[i].src[z->_p]);",
" break;",
" }",
" printf(\"(state %%d)\t[%%s]\\n\", z->_p, q?q:\"\");",
" /* printf(\"\\n\"); */",
" } }",
"moveon: z->_p = t->st;",
" }",
" wrap_trail();",
"}",
"#endif",
"int",
"f_pid(int pt)",
"{ int i;",
" P0 *z;",
" for (i = 0; i < now._nr_pr; i++)",
" { z = (P0 *)pptr(i);",
" if (z->_t == (unsigned) pt)",
" return BASE+z->_pid;",
" }",
" return -1;",
"}",
"",
"#if NCORE>1 && !defined(GLOB_HEAP)",
" #define SEP_HEAP /* version 5.1.2 */",
"#endif",
"",
"#ifdef BITSTATE",
"int",
"bstore_mod(char *v, int n) /* hasharray size not a power of two */",
"{ ulong x, y;",
" uint i = 1;",
"#if defined(MURMUR) && (WS==8)",
" m_hash((uchar *) v, n); /* bstore_mod - sets j3_spin, j4_spin, K1, K2 */",
"#else",
" d_hash((uchar *) v, n); /* bstore_mod - sets j3_spin, j4_spin, K1, K2 */",
"#endif",
" x = K1; y = j3_spin;", /* was K2 before 5.1.1 */
" for (;;)",
" { if (!(SS[x%%udmem]&(1<<y))) break;", /* take the hit in speed */
" if (i == hfns) {",
"#ifdef DEBUG",
" printf(\"Old bitstate\\n\");",
"#endif",
" return 1;",
" }",
" x = (x + K2 + i);", /* no mask, using mod - was K1 before 5.1.1 */
" y = (y + j4_spin) & 7;",
" i++;",
" }",
"#ifdef RANDSTOR",
" if (rand()%%100 > RANDSTOR) return 0;",
"#endif",
" for (;;)",
" { SS[x%%udmem] |= (1<<y);",
" if (i == hfns) break;", /* done */
" x = (x + K2 + i);", /* no mask - was K1 before 5.1.1 */
" y = (y + j4_spin) & 7;",
" i++;",
" }",
"#ifdef DEBUG",
" printf(\"New bitstate\\n\");",
"#endif",
" if (now._a_t&1)",
" { nShadow++;",
" }",
" return 0;",
"}",
"int",
"bstore_reg(char *v, int n) /* extended hashing, Peter Dillinger, 2004 */",
"{ ulong x, y;",
" uint i = 1;",
"#if defined(MURMUR) && (WS==8)",
" m_hash((uchar *) v, n); /* bstore_reg - sets j1_spin-j4_spin */",
"#else",
" d_hash((uchar *) v, n); /* bstore_reg - sets j1_spin-j4_spin */",
"#endif",
" x = j2_spin; y = j3_spin;",
" for (;;)",
" { if (!(SS[x]&(1<<y))) break;", /* at least one bit not set */
" if (i == hfns) {",
"#ifdef DEBUG",
" printf(\"Old bitstate\\n\");",
"#endif",
" return 1;",
" }",
" x = (x + j1_spin + i) & nmask;",
" y = (y + j4_spin) & 7;",
" i++;",
" }",
"#ifdef RANDSTOR",
" if (rand()%%100 > RANDSTOR) return 0;",
"#endif",
" for (;;)",
" { SS[x] |= (1<<y);",
" if (i == hfns) break;", /* done */
" x = (x + j1_spin + i) & nmask;",
" y = (y + j4_spin) & 7;",
" i++;",
" }",
"#ifdef DEBUG",
" printf(\"New bitstate\\n\");",
"#endif",
" if (now._a_t&1)",
" { nShadow++;",
" }",
" return 0;",
"}",
"#endif", /* BITSTATE */
"ulong TMODE = 0666; /* file permission bits for trail files */",
"",
"int trcnt=1;",
"char snap[64], fnm[512];",
"",
"int",
"make_trail(void)",
"{ int fd;",
" char *q;",
" char MyFile[512];",
" int w_flags = O_CREAT|O_WRONLY|O_TRUNC;",
"",
" if (exclusive == 1 && iterative == 0)",
" { w_flags |= O_EXCL;",
" }",
"",
" q = strrchr(TrailFile, \'/\');",
" if (q == NULL) q = TrailFile; else q++;",
" strcpy(MyFile, q); /* TrailFile is not a writable string */",
"",
" if (iterative == 0 && Nr_Trails++ > 0)",
" {",
"#ifdef PUTPID",
" sprintf(fnm, \"%%s_%%s_%%d_%%d.%%s\",",
" MyFile, progname, getpid(), Nr_Trails-1, tprefix);",
"#else",
" sprintf(fnm, \"%%s%%d.%%s\",",
" MyFile, Nr_Trails-1, tprefix);",
"#endif",
" } else",
" {",
"#ifdef PUTPID",
" sprintf(fnm, \"%%s_%%s_%%d.%%s\", MyFile, progname, getpid(), tprefix);",
"#else",
" sprintf(fnm, \"%%s.%%s\", MyFile, tprefix);",
"#endif",
" }",
" if ((fd = open(fnm, w_flags, TMODE)) < 0)",
" { if ((q = strchr(MyFile, \'.\')))",
" { *q = \'\\0\';", /* strip .pml */
" if (iterative == 0 && Nr_Trails-1 > 0)",
" sprintf(fnm, \"%%s%%d.%%s\",",
" MyFile, Nr_Trails-1, tprefix);",
" else",
" sprintf(fnm, \"%%s.%%s\", MyFile, tprefix);",
" *q = \'.\';",
" fd = open(fnm, w_flags, TMODE);",
" } }",
" if (fd < 0)",
" { printf(\"pan: cannot create %%s\\n\", fnm);",
" perror(\"cause\");",
" } else",
" {",
"#if NCORE>1 && (defined(SEP_STATE) || !defined(FULL_TRAIL))",
" void write_root(void); ",
" write_root();",
"#else",
" printf(\"pan: wrote %%s\\n\", fnm);",
"#endif",
" }",
" return fd;",
"}",
"",
"#ifndef FREQ",
"#define FREQ (1000000)",
"#endif",
"double freq = (double) FREQ;\n",

"#ifdef TRIX",
"void sv_populate(void);",
"",
"void",
"re_populate(void) /* restore procs and chans from now._ids_ */",
"{ int i, cnt = 0;",
" char *b;",
"#ifdef V_TRIX",
" printf(\"%%4d: re_populate\\n\", depth);",
"#endif",
" for (i = 0; i < now._nr_pr; i++, cnt++)",
" { b = now._ids_[cnt];",
" processes[i]->psize = what_p_size( ((P0 *)b)->_t );",
" memcpy(processes[i]->body, b, processes[i]->psize);",
"#ifdef TRIX_RIX",
" ((P0 *)pptr(i))->_pid = i;",
" if (BASE > 0 && h > 0)",
" { ((P0 *)pptr(i))->_pid -= BASE;",
" }",
"#endif",
"#ifndef BFS",
" processes[i]->modified = 1; /* re-populate */",
"#endif",
" }",
" for (i = 0; i < now._nr_qs; i++, cnt++)",
" { b = now._ids_[cnt];",
" channels[i]->psize = what_q_size( ((Q0 *)b)->_t );",
" memcpy(channels[i]->body, b, channels[i]->psize);",
"#ifndef BFS",
" channels[i]->modified = 1; /* re-populate */",
"#endif",
" }",
"}",
"#endif\n",

"#ifdef BFS", /* breadth-first search */
" #ifndef BFS_PAR",
" BFS_State *bfs_trail, *bfs_bot, *bfs_free;",
" SV_Hold *svfree;",
" #else",
" static ulong bfs_pre_allocated;",
" #endif",
" #ifdef BFS_DISK",
" #ifndef BFS_LIMIT",
" #define BFS_LIMIT 100000",
" #endif",
" #ifndef BFS_DSK_LIMIT",
" #define BFS_DSK_LIMIT 1000000",
" #endif",
" #if defined(WIN32) || defined(WIN64)",
" #define RFLAGS (O_RDONLY|O_BINARY)",
" #define WFLAGS (O_CREAT|O_WRONLY|O_TRUNC|O_BINARY)",
" #define RWFLAGS (O_RDWR|O_BINARY)",
" #else",
" #define RFLAGS (O_RDONLY)",
" #define WFLAGS (O_CREAT|O_WRONLY|O_TRUNC)",
" #define RWFLAGS (O_RDWR)",
" #endif",
"",
" long bfs_size_limit;",
" int bfs_dsk_write = -1;",
" int bfs_dsk_read = -1;",
" long bfs_dsk_writes, bfs_dsk_reads;",
" int bfs_dsk_seqno_w, bfs_dsk_seqno_r;",
" #endif",
"",
"uchar do_reverse(Trans *, short, uchar);",
"void snapshot(void);",
"#if 0",
"void",
"select_claim(int x) /* ignored in BFS mode */",
"{ if (verbose)",
" { printf(\"select %%d (ignored)\\n\", x);",
" }",
"}",
"#endif",
"Trail *ntrpt;",
"",
"#ifndef BFS_PAR",
"SV_Hold *",
"getsv(int n)",
"{ SV_Hold *h;",
"",
" if (svfree && n <= svfree->sz)",
" { h = svfree;",
" svfree = h->nxt;",
" h->nxt = (SV_Hold *) 0;",
" } else",
" { h = (SV_Hold *) emalloc(sizeof(SV_Hold));",
" h->sz = n;",
" #ifdef BFS_DISK",
" if (bfs_size_limit >= BFS_LIMIT)",
" { h->sv = (State *) 0; /* means: read disk */",
" bfs_dsk_writes++; /* count */",
" if (bfs_dsk_write < 0 /* file descriptor */",
" || bfs_dsk_writes%%BFS_DSK_LIMIT == 0)",
" { char dsk_nm[32];",
" if (bfs_dsk_write >= 0)",
" { (void) close(bfs_dsk_write);",
" }",
" sprintf(dsk_nm, \"pan_bfs_%%d.tmp\", bfs_dsk_seqno_w++);",
" bfs_dsk_write = open(dsk_nm, WFLAGS, 0644);",
" if (bfs_dsk_write < 0)",
" { Uerror(\"could not create tmp disk file\");",
" }",
" printf(\"pan: created disk file %%s\\n\", dsk_nm);",
" }",
" if (write(bfs_dsk_write, (char *) &now, n) != n)",
" { Uerror(\"aborting -- disk write failed (disk full?)\");",
" }",
" return h; /* no memcpy */",
" }", /* else */
" bfs_size_limit++;",
" #endif",
" h->sv = (State *) emalloc(sizeof(State) - VECTORSZ + n);",
" }",
"",
" memcpy((char *)h->sv, (char *)&now, n);",
" return h;",
"}",
"",
"EV_Hold *",
"getsv_mask(int n)",
"{ EV_Hold *h;",
" static EV_Hold *kept = (EV_Hold *) 0;",
"",
" for (h = kept; h; h = h->nxt)",
" if (n == h->sz",
"#if !defined(NOCOMP) && !defined(HC)",
" && (memcmp((char *) Mask, (char *) h->sv, n) == 0)",
"#endif",
" && (now._nr_pr == h->nrpr)",
" && (now._nr_qs == h->nrqs)",
" #ifdef TRIX",
" )",
" #else",
" #if VECTORSZ>32000",
" && (memcmp((char *) proc_offset, (char *) h->po, now._nr_pr * sizeof(int)) == 0)",
" && (memcmp((char *) q_offset, (char *) h->qo, now._nr_qs * sizeof(int)) == 0)",
" #else",
" && (memcmp((char *) proc_offset, (char *) h->po, now._nr_pr * sizeof(short)) == 0)",
" && (memcmp((char *) q_offset, (char *) h->qo, now._nr_qs * sizeof(short)) == 0)",
" #endif",
" && (memcmp((char *) proc_skip, (char *) h->ps, now._nr_pr * sizeof(uchar)) == 0)",
" && (memcmp((char *) q_skip, (char *) h->qs, now._nr_qs * sizeof(uchar)) == 0))",
" #endif",
" break;",
" if (!h)",
" { h = (EV_Hold *) emalloc(sizeof(EV_Hold));",
" h->sz = n;",
" h->nrpr = now._nr_pr;",
" h->nrqs = now._nr_qs;",
"",
" h->sv = (char *) emalloc(n * sizeof(char));",
"#if !defined(NOCOMP) && !defined(HC)",
" memcpy((char *) h->sv, (char *) Mask, n);",
"#endif",
" #ifndef TRIX",
" if (now._nr_pr > 0)",
" { h->ps = (char *) emalloc(now._nr_pr * sizeof(int));",
" memcpy((char *) h->ps, (char *) proc_skip, now._nr_pr * sizeof(uchar));",
" #if VECTORSZ>32000",
" h->po = (char *) emalloc(now._nr_pr * sizeof(int));",
" memcpy((char *) h->po, (char *) proc_offset, now._nr_pr * sizeof(int));",
" #else",
" h->po = (char *) emalloc(now._nr_pr * sizeof(short));",
" memcpy((char *) h->po, (char *) proc_offset, now._nr_pr * sizeof(short));",
" #endif",
" }",
" if (now._nr_qs > 0)",
" { h->qs = (char *) emalloc(now._nr_qs * sizeof(int));",
" memcpy((char *) h->qs, (char *) q_skip, now._nr_qs * sizeof(uchar));",
" #if VECTORSZ>32000",
" h->qo = (char *) emalloc(now._nr_qs * sizeof(int));",
" memcpy((char *) h->qo, (char *) q_offset, now._nr_qs * sizeof(int));",
" #else",
" h->qo = (char *) emalloc(now._nr_qs * sizeof(short));",
" memcpy((char *) h->qo, (char *) q_offset, now._nr_qs * sizeof(short));",
" #endif",
" }",
" #endif",
" h->nxt = kept;",
" kept = h;",
" }",
" return h;",
"}",
"",
"void",
"freesv(SV_Hold *p)",
"{ SV_Hold *h, *oh;",
"",
" oh = (SV_Hold *) 0;",
" for (h = svfree; h; oh = h, h = h->nxt)",
" { if (p->sz >= h->sz)",
" break;",
" }",
" if (!oh)",
" { p->nxt = svfree;",
" svfree = p;",
" } else",
" { p->nxt = h;",
" oh->nxt = p;",
" }",
"}",
"",
"BFS_State *",
"get_bfs_frame(void)",
"{ BFS_State *t;",
"",
" if (bfs_free)",
" { t = bfs_free;",
" bfs_free = bfs_free->nxt;",
" t->nxt = (BFS_State *) 0;",
" } else",
" { t = (BFS_State *) emalloc(sizeof(BFS_State));",
" }",
" t->frame = (Trail *) emalloc(sizeof(Trail));", /* always new */
" /* new because we keep a ptr to the frame of parent states */",
" /* used for reconstructing path and recovering failed rvs etc */",
" return t;",
"}",
"",
"void",
"push_bfs(Trail *f, int d)",
"{ BFS_State *t;",
"",
" t = get_bfs_frame();",
" memcpy((char *)t->frame, (char *)f, sizeof(Trail));",
" t->frame->o_tt = d; /* depth */",
"",
" t->boq = boq;",
" #ifdef TRIX",
" sv_populate();",
" #endif",
" t->onow = getsv(vsize);",
" t->omask = getsv_mask(vsize);",
" #if defined(FULLSTACK) && defined(Q_PROVISO)",
" t->lstate = Lstate; /* bfs */",
" #endif",
" if (!bfs_bot)",
" { bfs_bot = bfs_trail = t;",
" } else",
" { bfs_bot->nxt = t;",
" bfs_bot = t;",
" }",
" #ifdef VERBOSE",
" t->nr = nstates;",
" #endif",
" #ifdef CHECK",
" #ifdef VERBOSE",
" printf(\"PUSH %%lu (depth %%d, nr %%lu)\\n\", (ulong) t->frame, d, t->nr);",
" #else",
" printf(\"PUSH %%lu (depth %%d)\\n\", (ulong) t->frame, d);",
" #endif",
" #endif",
"}",
"",
"Trail *",
"pop_bfs(void)",
"{ BFS_State *t;",
"",
" if (!bfs_trail)",
" { return (Trail *) 0;",
" }",
" t = bfs_trail;",
" bfs_trail = t->nxt;",
" if (!bfs_trail)",
" { bfs_bot = (BFS_State *) 0;",
" }",
" #if defined(Q_PROVISO) && !defined(BITSTATE) && !defined(NOREDUCE)",
" if (t->lstate) /* bfs */",
" { t->lstate->tagged = 0; /* bfs */",
" }",
" #endif",
" t->nxt = bfs_free;",
" bfs_free = t;",
"",
" vsize = t->onow->sz;",
" boq = t->boq;",
" #ifdef BFS_DISK",
" if (t->onow->sv == (State *) 0)",
" { char dsk_nm[32];",
" bfs_dsk_reads++; /* count */",
" if (bfs_dsk_read >= 0 /* file descriptor */",
" && bfs_dsk_reads%%BFS_DSK_LIMIT == 0)",
" { (void) close(bfs_dsk_read);",
" sprintf(dsk_nm, \"pan_bfs_%%d.tmp\", bfs_dsk_seqno_r-1);",
" (void) unlink(dsk_nm);",
" bfs_dsk_read = -1;",
" }",
" if (bfs_dsk_read < 0)",
" { sprintf(dsk_nm, \"pan_bfs_%%d.tmp\", bfs_dsk_seqno_r++);",
" bfs_dsk_read = open(dsk_nm, RFLAGS);",
" if (bfs_dsk_read < 0)",
" { Uerror(\"could not open temp disk file\");",
" } }",
" if (read(bfs_dsk_read, (char *) &now, vsize) != vsize)",
" { Uerror(\"bad bfs disk file read\");",
" }",
" #ifndef NOVSZ",
" if (now._vsz != vsize)",
" { Uerror(\"disk read vsz mismatch\");",
" }",
" #endif",
" } else",
" #endif",
" { memcpy((uchar *) &now, (uchar *) t->onow->sv, vsize);",
" #ifndef NOVSZ",
" vsize = now._vsz;",
" #endif",
" }",
"#if !defined(NOCOMP) && !defined(HC)",
" memcpy((uchar *) Mask, (uchar *) t->omask->sv, vsize);",
"#endif",
" #ifdef TRIX",
" re_populate();",
" #else",
" if (now._nr_pr > 0)",
" #if VECTORSZ>32000",
" { memcpy((char *)proc_offset, (char *)t->omask->po, now._nr_pr * sizeof(int));",
" #else",
" { memcpy((char *)proc_offset, (char *)t->omask->po, now._nr_pr * sizeof(short));",
" #endif",
" memcpy((char *)proc_skip, (char *)t->omask->ps, now._nr_pr * sizeof(uchar));",
" }",
" if (now._nr_qs > 0)",
" #if VECTORSZ>32000",
" { memcpy((uchar *)q_offset, (uchar *)t->omask->qo, now._nr_qs * sizeof(int));",
" #else",
" { memcpy((uchar *)q_offset, (uchar *)t->omask->qo, now._nr_qs * sizeof(short));",
" #endif",
" memcpy((uchar *)q_skip, (uchar *)t->omask->qs, now._nr_qs * sizeof(uchar));",
" }",
" #endif",
" #ifdef BFS_DISK",
" if (t->onow->sv != (State *) 0)",
" #endif",
" { freesv(t->onow); /* omask not freed */",
" }",
" #ifdef CHECK",
" #ifdef VERBOSE",
" printf(\"POP %%lu (depth %%d, nr %%lu)\\n\", (ulong) t->frame, t->frame->o_tt, t->nr);",
" #else",
" printf(\"POP %%lu (depth %%d)\\n\", (ulong) t->frame, t->frame->o_tt);",
" #endif",
" #endif",
" return t->frame;",
"}",
"",
"void",
"store_state(Trail *ntrpt, int shortcut, short oboq)",
"{",
" #ifdef VERI",
" Trans *t2 = (Trans *) 0;",
" uchar ot; int tt, E_state;",
" uchar o_opm = trpt->o_pm, *othis = this;",
"",
" if (shortcut)",
" {",
" #ifdef VERBOSE",
" printf(\"claim: shortcut\\n\");",
" #endif",
" goto store_it; /* no claim move */",
" }",
"",
" this = pptr(0); /* 0 = never claim */",
" trpt->o_pm = 0;", /* to interpret else in never claim */
"",
" tt = (int) ((P0 *)this)->_p;",
" ot = (uchar) ((P0 *)this)->_t;",
"",
" #ifdef HAS_UNLESS",
" E_state = 0;",
" #endif",
" for (t2 = trans[ot][tt]; t2; t2 = t2?t2->nxt:(Trans *)0)",
" {",
" #ifdef HAS_UNLESS",
" if (E_state > 0 && E_state != t2->e_trans)",
" { break;",
" }",
" #endif",
" if (do_transit(t2, 0))",
" {",
" #ifdef VERBOSE",
" if (!reached[ot][t2->st])",
" printf(\"depth: %%d -- claim move from %%d -> %%d\\n\",",
" trpt->o_tt, ((P0 *)this)->_p, t2->st);",
" #endif",
" #ifdef HAS_UNLESS",
" E_state = t2->e_trans;",
" #endif",
" if (t2->st > 0)",
" { ((P0 *)this)->_p = t2->st;",
" reached[ot][t2->st] = 1;",
" #ifndef NOCLAIM",
" if (stopstate[ot][t2->st])",
" { uerror(\"end state in claim reached\");",
" }",
" #endif",
" }",
" if (now._nr_pr == 0) /* claim terminated */",
" uerror(\"end state in claim reached\");",
"",
" #ifdef PEG",
" peg[t2->forw]++;",
" #endif",
" trpt->o_pm |= 1;",
" if (t2->atom&2)",
" { Uerror(\"atomic in claim not supported in BFS\");",
" }",
"store_it:",
"",
" #endif", /* VERI */
"",
" #if defined(BITSTATE)",
" if (!b_store((char *)&now, vsize))",
" #elif defined(MA)",
" if (!g_store((char *)&now, vsize, 0))",
" #else",
" if (!h_store((char *)&now, vsize))",
" #endif",
" { static long sdone = (long) 0; long ndone;",
" nstates++;",
" #ifndef NOREDUCE",
" trpt->tau |= 64;", /* bfs: succ definitely outside stack */
" #endif",
" ndone = (ulong) (nstates/(freq));",
" if (ndone != sdone && mreached%%10 != 0)",
" { snapshot();",
" sdone = ndone;",
" #if defined(AUTO_RESIZE) && !defined(BITSTATE) && !defined(MA)",
" if (nstates > ((double)(1<<(ssize+1))))",
" { void resize_hashtable(void);",
" resize_hashtable();",
" }",
" #endif",
" }",
" #if SYNC",
" if (boq != -1)",
" midrv++;",
" else if (oboq != -1)",
" { Trail *x;",
" x = (Trail *) trpt->ostate; /* pre-rv state */",
" if (x) x->o_pm |= 4; /* mark success */",
" }",
" #endif",
" push_bfs(ntrpt, trpt->o_tt+1);",
" } else",
" { truncs++;",

" #if defined(Q_PROVISO) && !defined(NOREDUCE) && defined(FULLSTACK)",
" #if !defined(BITSTATE)",
" if (Lstate && Lstate->tagged)",
" { trpt->tau |= 64;",
" }",
" #else",
" if (trpt->tau&32)",
" { BFS_State *tprov;",
" for (tprov = bfs_trail; tprov; tprov = tprov->nxt)",
" if (tprov->onow->sv != (State *) 0",
" && memcmp((uchar *)&now, (uchar *)tprov->onow->sv, vsize) == 0)",
" { trpt->tau |= 64;",
" break; /* state is in queue */",
" } }",
" #endif",
" #endif",
" }",
" #ifdef VERI",
" ((P0 *)this)->_p = tt; /* reset claim */",
" if (t2)",
" do_reverse(t2, 0, 0);",
" else",
" break;",
" } }",
" this = othis;",
" trpt->o_pm = o_opm;",
" #endif",
"}",
"",
"void",
"bfs(void)",
"{ Trans *t; Trail *otrpt, *x;",
" uchar _n, _m, ot, nps = 0;",
" int tt, E_state;",
" short II, From = (short) (now._nr_pr-1), To = BASE;",
" short oboq = boq;",
"",
" ntrpt = (Trail *) emalloc(sizeof(Trail));",
" trpt->ostate = (H_el *) 0;",
" trpt->tau = 0;",
"",
" trpt->o_tt = -1;",
" store_state(ntrpt, 0, oboq); /* initial state */",
"",
" while ((otrpt = pop_bfs())) /* also restores now */",
" { memcpy((char *) trpt, (char *) otrpt, sizeof(Trail));",
" #if defined(C_States) && (HAS_TRACK==1)",
" c_revert((uchar *) &(now.c_state[0]));",
" #endif",
" if (trpt->o_pm & 4)",
" {",
" #ifdef VERBOSE",
" printf(\"Revisit of atomic not needed (%%d)\\n\",",
" trpt->o_pm);", /* at least 1 rv succeeded */
" #endif",
" continue;",
" }",
" #ifndef NOREDUCE",
" nps = 0;",
" #endif",
" if (trpt->o_pm == 8)",
" { revrv++;",
" if (trpt->tau&8)",
" {",
" #ifdef VERBOSE",
" printf(\"Break atomic (pm:%%d,tau:%%d)\\n\",",
" trpt->o_pm, trpt->tau);",
" #endif",
" trpt->tau &= ~8;",
" }",
" #ifndef NOREDUCE",
" else if (trpt->tau&32)", /* was a preselected move */
" {",
" #ifdef VERBOSE",
" printf(\"Void preselection (pm:%%d,tau:%%d)\\n\",",
" trpt->o_pm, trpt->tau);",
" #endif",
" trpt->tau &= ~32;",
" nps = 1; /* no preselection in repeat */",
" }",
" #endif",
" }",
" trpt->o_pm &= ~(4|8);",
" if (trpt->o_tt > mreached)",
" { mreached = trpt->o_tt;",
" if (mreached%%10 == 0)",
" { snapshot();",
" } }",
" depth = trpt->o_tt;",

" if (depth >= maxdepth)",
" {",
" #if SYNC",
" Trail *x;",
" if (boq != -1)",
" { x = (Trail *) trpt->ostate;",
" if (x) x->o_pm |= 4; /* not failing */",
" }",
" #endif",
" truncs++;",
" if (!warned)",
" { warned = 1;",
" printf(\"error: max search depth too small\\n\");",
" }",
" if (bounded)",
" { uerror(\"depth limit reached\");",
" }",
" continue;",
" }",
" #ifndef NOREDUCE",
" if (boq == -1 && !(trpt->tau&8) && nps == 0)",
" for (II = now._nr_pr-1; II >= BASE; II -= 1)",
" {",
"Pickup: this = pptr(II);",
" tt = (int) ((P0 *)this)->_p;",
" ot = (uchar) ((P0 *)this)->_t;",
" if (trans[ot][tt]->atom & 8)", /* safe */
" { t = trans[ot][tt];",
" if (t->qu[0] != 0)",
" { Ccheck++;",
" if (!q_cond(II, t))",
" continue;",
" Cholds++;",
" }",
" From = To = II;",
" trpt->tau |= 32; /* preselect marker */",
" #ifdef DEBUG",
" printf(\"%%3ld: proc %%d PreSelected (tau=%%d)\\n\", ",
" depth, II, trpt->tau);",
" #endif",
" goto MainLoop;",
" } }",
" trpt->tau &= ~32;", /* not preselected */
" #endif", /* if !NOREDUCE */
"Repeat:",
" if (trpt->tau&8) /* atomic */",
" { From = To = (short ) trpt->pr;",
" nlinks++;",
" } else",
" { From = now._nr_pr-1;",
" To = BASE;",
" }",
"MainLoop:",
" _n = _m = 0;",
" for (II = From; II >= To; II -= 1)",
" {",
" this = pptr(II);",
" tt = (int) ((P0 *)this)->_p;",
" ot = (uchar) ((P0 *)this)->_t;",
" #if SYNC",
" /* no rendezvous with same proc */",
" if (boq != -1 && trpt->pr == II)",
" { continue;",
" }",
" #endif",
" ntrpt->pr = (uchar) II;",
" ntrpt->st = tt; ",
" trpt->o_pm &= ~1; /* no move yet */",
" #ifdef EVENT_TRACE",
" trpt->o_event = now._event;",
" #endif",

" #ifdef HAS_PRIORITY",
" if (!highest_priority(((P0 *)this)->_pid, II, t))",
" { continue;",
" }",
" #else",
" #ifdef HAS_PROVIDED",
" if (!provided(II, ot, tt, t))",
" { continue;",
" }",
" #endif",
" #endif",

" #ifdef HAS_UNLESS",
" E_state = 0;",
" #endif",
" for (t = trans[ot][tt]; t; t = t->nxt)",
" {",
" #ifdef HAS_UNLESS",
" if (E_state > 0",
" && E_state != t->e_trans)",
" break;",
" #endif",
" ntrpt->o_t = t;",
"",
" oboq = boq;",
"",
" if (!(_m = do_transit(t, II)))",
" continue;",
"",
" trpt->o_pm |= 1; /* we moved */",
" (trpt+1)->o_m = _m; /* for unsend */",
" #ifdef PEG",
" peg[t->forw]++;",
" #endif",
" #ifdef CHECK",
" printf(\"%%3ld: proc %%d exec %%d, \",",
" depth, II, t->forw);",
" printf(\"%%d to %%d, %%s %%s %%s\",",
" tt, t->st, t->tp,",
" (t->atom&2)?\"atomic\":\"\",",
" (boq != -1)?\"rendez-vous\":\"\");",
" #ifdef HAS_UNLESS",
" if (t->e_trans)",
" printf(\" (escapes to state %%d)\", t->st);",
" #endif",
" printf(\" %%saccepting [tau=%%d]\\n\",",
" (trpt->o_pm&2)?\"\":\"non-\", trpt->tau);",
" #endif",
" #ifdef HAS_UNLESS",
" E_state = t->e_trans;",
" #if SYNC>0",
" if (t->e_trans > 0 && (boq != -1 /* || oboq != -1 */))",
" { fprintf(efd, \"error:\ta rendezvous stmnt in the escape clause\\n\");",
" fprintf(efd, \"\tof an unless stmnt is not compatible with -DBFS\\n\");",
" pan_exit(1);",
" }",
" #endif",
" #endif",
" if (t->st > 0)",
" { ((P0 *)this)->_p = t->st;",
" }",
"",
" /* ptr to pred: */ ntrpt->ostate = (H_el *) otrpt;",
" ntrpt->st = tt;",
" if (boq == -1 && (t->atom&2)) /* atomic */",
" ntrpt->tau = 8; /* record for next move */",
" else",
" ntrpt->tau = 0;",
" store_state(ntrpt, (boq != -1 || (t->atom&2)), oboq);",
" #ifdef EVENT_TRACE",
" now._event = trpt->o_event;",
" #endif",
" /* undo move and continue */",
" trpt++; /* this is where ovals and ipt are set */",
" do_reverse(t, II, _m); /* restore now. */",
" trpt--;",
" #ifdef CHECK",
" enter_critical(GLOBAL_LOCK); /* verbose mode */",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"%%3lu: proc %%d \", depth, II);",
" printf(\"reverses %%d, %%d to %%d,\",",
" t->forw, tt, t->st);",
" printf(\" %%s [abit=%%d,adepth=%%ld,\",",
" t->tp, now._a_t, A_depth);",
" printf(\"tau=%%d,%%d]\\n\",",
" trpt->tau, (trpt-1)->tau);",
" leave_critical(GLOBAL_LOCK);",
" #endif",
" reached[ot][t->st] = 1;",
" reached[ot][tt] = 1;",
"",
" ((P0 *)this)->_p = tt;",
" _n |= _m;",
" } }",
" #ifndef NOREDUCE", /* with PO */
" /* preselected - no succ definitely outside stack */",
" if ((trpt->tau&32) && !(trpt->tau&64))",
" { From = now._nr_pr-1; To = BASE;",
" #ifdef DEBUG",
" cpu_printf(\"%%3ld: proc %%d UnSelected (_n=%%d, tau=%%d)\\n\", ",
" depth, II+1, (int) _n, trpt->tau);",
" #endif",
" _n = 0; trpt->tau &= ~32;",
" if (II >= BASE)",
" { goto Pickup;",
" }",
" goto MainLoop;",
" }",
" trpt->tau &= ~(32|64);",
" #endif", /* PO */
" if (_n != 0)",
" { continue;",
" }",
" #ifdef DEBUG",
" printf(\"%%3ld: no move [II=%%d, tau=%%d, boq=%%d, _nr_pr=%%d]\\n\",",
" depth, II, trpt->tau, boq, now._nr_pr);",
" #endif",
" if (boq != -1)",
" { failedrv++;",
" x = (Trail *) trpt->ostate; /* pre-rv state */",
" if (!x)",
" { continue; /* root state */",
" }",
" if ((x->tau&8) || (x->tau&32)) /* break atomic or preselect at parent */",
" { x->o_pm |= 8; /* mark failure */",
" this = pptr(otrpt->pr);",
" #ifdef VERBOSE",
" printf(\"\\treset state of %%d from %%d to %%d\\n\",",
" otrpt->pr, ((P0 *)this)->_p, otrpt->st);",
" #endif",
" ((P0 *)this)->_p = otrpt->st;",
" unsend(boq); /* retract rv offer */",
" boq = -1;",

" push_bfs(x, x->o_tt);",
" #ifdef VERBOSE",
" printf(\"failed rv, repush with %%d\\n\", x->o_pm);",
" #endif",
" }",
" #ifdef VERBOSE",
" else",
" { printf(\"failed rv, tau at parent: %%d\\n\", x->tau);",
" }",
" #endif",
" } else if (now._nr_pr > 0)",
" {",
" if ((trpt->tau&8)) /* atomic */",
" { trpt->tau &= ~(1|8); /* 1=timeout, 8=atomic */",
" #ifdef DEBUG",
" printf(\"%%3ld: atomic step proc %%d blocks\\n\",",
" depth, II+1);",
" #endif",
" goto Repeat;",
" }",
"",
" if (!(trpt->tau&1)) /* didn't try timeout yet */",
" { trpt->tau |= 1;",
" #ifdef DEBUG",
" printf(\"%%ld: timeout\\n\", depth);",
" #endif",
" goto MainLoop;",
" }",
" #ifndef VERI",
" if (!noends && !a_cycles && !endstate())",
" { uerror(\"invalid end state\");",
" }",
" #endif",
" } }",
"}",
"#endif", /* !BFS_PAR */
"",
"void",
"putter(Trail *trpt, int fd)",
"{ long j;",
"",
" if (!trpt) return;",
"",
" if (trpt != (Trail *) trpt->ostate)",
" putter((Trail *) trpt->ostate, fd);",
"",
" if (trpt->o_t)",
" { sprintf(snap, \"%%d:%%d:%%d\\n\",",
" trcnt++, trpt->pr, trpt->o_t->t_id);",
" j = strlen(snap);",
" if (write(fd, snap, j) != j)",
" { printf(\"pan: error writing %%s\\n\", fnm);",
" pan_exit(1);",
" } }",
"}",
"",
"void",
"n_ewrite(int fd, char *s, int n)",
"{ if (write(fd, s, strlen(s)) != strlen(s))",
" { printf(\"pan: error writing %%s\\n\", fnm);",
" pan_exit(1);",
" }",
"}",
"",
"void",
"nuerror(void)",
"{ int fd = make_trail();",
" int j;",
"",
" if (fd < 0) return;",
" #ifdef VERI",
" sprintf(snap, \"-2:%%d:-2\\n\", (uchar) ((P0 *)pptr(0))->_t);",
" n_ewrite(fd, snap, strlen(snap));",
" #endif",
" #ifdef MERGED",
" sprintf(snap, \"-4:-4:-4\\n\");",
" n_ewrite(fd, snap, strlen(snap));",
" #endif",
" trcnt = 1;",
" putter(trpt, fd);",
" if (ntrpt->o_t)", /* 4.2.8 -- Alex example, missing last transition */
" { sprintf(snap, \"%%d:%%d:%%d\\n\",",
" trcnt++, ntrpt->pr, ntrpt->o_t->t_id);",
" j = strlen(snap);",
" n_ewrite(fd, snap, j);",
" }",
" close(fd);",
" if (errors >= upto && upto != 0)",
" { wrapup();",
" }",
"}",
"#endif", /* BFS */
0,
};

static const char *Code2d[] = {
"clock_t start_time;",
"#if NCORE>1",
"clock_t crash_stamp;",
"#endif",
"#if !defined(WIN32) && !defined(WIN64)",
"struct tms start_tm;",
"#endif",
"",
"#if SYNC",
"extern int q_zero(int);",
"extern int not_RV(int);",
"#endif",
"",
"void",
"start_timer(void)",
"{",
"#if defined(WIN32) || defined(WIN64)",
" start_time = clock();",
"#else",
" start_time = times(&start_tm);",
"#endif",
"}",
"",
"double delta_time;",
"",
"void",
"report_time(void)",
"{",
" printf(\"\\npan: elapsed time %%.3g seconds\\n\", delta_time);",
" if (delta_time > 0.01)",
" { printf(\"pan: rate %%9.8g states/second\\n\", nstates/delta_time);",
" if (verbose)",
" { printf(\"pan: avg transition delay %%.5g usec\\n\",",
" delta_time/(nstates+truncs));",
" } }",
"}",
"",
"void",
"stop_timer(int report)",
"{ clock_t stop_time;",
"#if !defined(WIN32) && !defined(WIN64)",
" struct tms stop_tm;",
" stop_time = times(&stop_tm);",
" delta_time = ((double) (stop_time - start_time)) / ((double) sysconf(_SC_CLK_TCK));",
"#else",
" stop_time = clock();",
" delta_time = ((double) (stop_time - start_time)) / ((double) CLOCKS_PER_SEC);",
"#endif",
" if (readtrail || delta_time < 0.00) return;",
"#if NCORE>1",
" if (core_id == 0 && nstates > (double) 0)",
" { printf(\"\\ncpu%%d: elapsed time %%.3g seconds (%%g states visited)\\n\",",
" core_id, delta_time, nstates);",
" if (delta_time > 0.01)",
" { printf(\"cpu%%d: rate %%g states/second\\n\", core_id, nstates/delta_time);",
" }",
" { void check_overkill(void);",
" check_overkill();",
" } }",
"#else",
" if (report)",
" { report_time();",
" }",
"#endif",
"}",
"",
"#if NCORE>1",
"#ifdef T_ALERT",
"double t_alerts[17];",
"",
"void",
"crash_report(void)",
"{ int i;",
" printf(\"crash alert intervals:\\n\");",
" for (i = 0; i < 17; i++)",
" { printf(\"%%d\\t%%g\\n\", i, t_alerts[i]);",
"} }",
"#endif",
"",
"void",
"crash_reset(void)",
"{ /* false alarm */",
" if (crash_stamp != (clock_t) 0)",
" {",
"#ifdef T_ALERT",
" double delta_time;",
" int i;",
"#if defined(WIN32) || defined(WIN64)",
" delta_time = ((double) (clock() - crash_stamp)) / ((double) CLOCKS_PER_SEC);",
"#else",
" delta_time = ((double) (times(&start_tm) - crash_stamp)) / ((double) sysconf(_SC_CLK_TCK));",
"#endif",
" for (i = 0; i < 16; i++)",
" { if (delta_time <= (i*30))",
" { t_alerts[i] = delta_time;",
" break;",
" } }",
" if (i == 16) t_alerts[i] = delta_time;",
"#endif",
" if (verbose)",
" printf(\"cpu%%d: crash alert off\\n\", core_id);",
" }",
" crash_stamp = (clock_t) 0;",
"}",
"",
"int",
"crash_test(double maxtime)",
"{ double delta_time;",
" if (crash_stamp == (clock_t) 0)",
" { /* start timing */",
"#if defined(WIN32) || defined(WIN64)",
" crash_stamp = clock();",
"#else",
" crash_stamp = times(&start_tm);",
"#endif",
" if (verbose)",
" { printf(\"cpu%%d: crash detection\\n\", core_id);",
" }",
" return 0;",
" }",
"#if defined(WIN32) || defined(WIN64)",
" delta_time = ((double) (clock() - crash_stamp)) / ((double) CLOCKS_PER_SEC);",
"#else",
" delta_time = ((double) (times(&start_tm) - crash_stamp)) / ((double) sysconf(_SC_CLK_TCK));",
"#endif",
" return (delta_time >= maxtime);",
"}",
"#endif",
"",
"#ifdef BFS_PAR",
"int ncores = 0;",
"#endif",
"",
"void",
"do_the_search(void)",
"{ int i;",
" depth = mreached = 0;",
" trpt = &trail[0];",
"#ifdef VERI",
" trpt->tau |= 4; /* the claim moves first */",
"#endif",
" for (i = 0; i < (int) now._nr_pr; i++)",
" { P0 *ptr = (P0 *) pptr(i);",
"#ifndef NP",
" if (!(trpt->o_pm&2)",
" && accpstate[ptr->_t][ptr->_p])",
" { trpt->o_pm |= 2;",
" break;",
" }",
"#else",
" if (!(trpt->o_pm&4)",
" && progstate[ptr->_t][ptr->_p])",
" { trpt->o_pm |= 4;",
" break;",
" }",
"#endif",
" }",
"#ifdef EVENT_TRACE",
"#ifndef NP",
" if (accpstate[EVENT_TRACE][now._event])",
" { trpt->o_pm |= 2;",
" }",
"#else",
" if (progstate[EVENT_TRACE][now._event])",
" { trpt->o_pm |= 4;",
" }",
"#endif",
"#endif",
"#if !defined(NOCOMP) && !defined(HC)",
" Mask[0] = Mask[1] = 1; /* _nr_pr, _nr_qs */",
" if (!a_cycles)",
" { i = &(now._a_t) - (uchar *) &now;",
" Mask[i] = 1; /* _a_t */",
" }",
" #ifndef NOFAIR",
" if (!fairness)",
" { int j = 0;",
" i = &(now._cnt[0]) - (uchar *) &now;",
" while (j++ < NFAIR)",
" Mask[i++] = 1; /* _cnt[] */",
" }",
" #endif",
"#endif",
"#ifndef NOFAIR",
" if (fairness",
" && (a_cycles && (trpt->o_pm&2)))",
" { now._a_t = 2; /* set the A-bit */",
" now._cnt[0] = now._nr_pr + 1;", /* NEW: +1 */
"#ifdef VERBOSE",
" printf(\"%%3ld: fairness Rule 1, cnt=%%d, _a_t=%%d\\n\",",
" depth, now._cnt[now._a_t&1], now._a_t);",
"#endif",
" }",
"#endif",

" c_stack_start = (char *) &i; /* meant to be read-only */",

"#if defined(HAS_CODE) && defined (C_INIT)",
" C_INIT; /* initialization of data that must precede fork() */",
" c_init_done++;",
"#endif",

"#if defined(C_States) && (HAS_TRACK==1)",
" /* capture initial state of tracked C objects */",
" c_update((uchar *) &(now.c_state[0]));",
"#endif",

"#ifdef HAS_CODE",
" if (readtrail) getrail(); /* no return */",
"#endif",
"#ifndef BFS_PAR",
" start_timer();",
"#endif",
"#ifdef BFS",
" #ifdef BFS_PAR",
" bfs_main(ncores,0);",
" #else",
" bfs();",
" #endif",
"#else",
" #if defined(C_States) && defined(HAS_STACK) && (HAS_TRACK==1)",
" /* initial state of tracked & unmatched objects */",
" c_stack((uchar *) &(svtack->c_stack[0]));",
" #endif",

" #if defined(P_RAND) || defined(T_RAND)",
" srand(s_rand+HASH_NR);", /* do_the_search */
" #endif",

" #if NCORE>1",
" mem_get();",
" #else",
" new_state(); /* start 1st DFS */",
" #endif",
"#endif",
"}",

"#ifdef INLINE_REV",
"uchar",
"do_reverse(Trans *t, short II, uchar M)",
"{ uchar _m = M;",
" int tt = (int) ((P0 *)this)->_p;",
"#include BACKWARD_MOVES",
"R999: return _m;",
"}",
"#endif",

"#ifndef INLINE",
" #ifdef EVENT_TRACE",
"static char _tp = 'n'; static int _qid = 0;",
" #endif",
"uchar",
"do_transit(Trans *t, short II)",
"{ uchar _m = 0;",
" int tt = (int) ((P0 *)this)->_p;",
" #ifdef M_LOSS",
" uchar delta_m = 0;",
" #endif",
" #ifdef EVENT_TRACE",
" short oboq = boq;",
" uchar ot = (uchar) ((P0 *)this)->_t;",
" if (II == -EVENT_TRACE) boq = -1;",
"#define continue { boq = oboq; return 0; }",
" #else",
"#define continue return 0",
"#ifdef SEPARATE",
" uchar ot = (uchar) ((P0 *)this)->_t;",
"#endif",
" #endif",
"#include FORWARD_MOVES",
"P999:",
" #ifdef EVENT_TRACE",
" if (II == -EVENT_TRACE) boq = oboq;",
" #endif",
" return _m;",
" #undef continue",
"}",
"#ifdef EVENT_TRACE",
"void",
"require(char tp, int qid)",
"{ Trans *t;",
" _tp = tp; _qid = qid;",
"",
" if (now._event != endevent)",
" for (t = trans[EVENT_TRACE][now._event]; t; t = t->nxt)",
" { if (do_transit(t, -EVENT_TRACE))",
" { now._event = t->st;",
" reached[EVENT_TRACE][t->st] = 1;",
" #ifdef VERBOSE",
" printf(\" event_trace move to -> %%d\\n\", t->st);",
" #endif",
" #ifndef BFS",
" #ifndef NP",
" if (accpstate[EVENT_TRACE][now._event])",
" (trpt+1)->o_pm |= 2;",
" #else",
" if (progstate[EVENT_TRACE][now._event])",
" (trpt+1)->o_pm |= 4;",
" #endif",
" #endif",
" #ifdef NEGATED_TRACE",
" if (now._event == endevent)",
" {",
" #ifndef BFS",
" depth++; trpt++;",
" #endif",
" uerror(\"event_trace error (all events matched)\");",
" #ifndef BFS",
" trpt--; depth--;",
" #endif",
" break;",
" }",
" #endif",
" for (t = t->nxt; t; t = t->nxt)",
" { if (do_transit(t, -EVENT_TRACE))",
" Uerror(\"non-determinism in event-trace\");",
" }",
" return;",
" }",
" #ifdef VERBOSE",
" else",
" printf(\" event_trace miss '%%c' -- %%d, %%d, %%d\\n\",",
" tp, qid, now._event, t->forw);",
" #endif",
" }",
" #ifdef NEGATED_TRACE",
" now._event = endevent; /* only 1st try will count -- fixed 4.2.6 */",
" #else",
" #ifndef BFS",
" depth++; trpt++;",
" #endif",
" uerror(\"event_trace error (no matching event)\");",
" #ifndef BFS",
" trpt--; depth--;",
" #endif",
" #endif",
"}",
"#endif",
"int",
"enabled(int iam, int pid)",
"{ Trans *t; uchar *othis = this;",
" int res = 0; int tt; uchar ot;",
"",
" pid += BASE;",
" if (pid == iam)",
" Uerror(\"used: enabled(pid=thisproc)\");",
" if (pid < 0 || pid >= (int) now._nr_pr)",
" return 0;",
" this = pptr(pid);",
" TstOnly = 1;",
" tt = (int) ((P0 *)this)->_p;",
" ot = (uchar) ((P0 *)this)->_t;",
" for (t = trans[ot][tt]; t; t = t->nxt)",
" if (do_transit(t, (short) pid))",
" { res = 1;",
" break;",
" }",
" TstOnly = 0;",
" this = othis;",
" return res;",
"}",
"#endif",
"",
"#ifdef HAS_PRIORITY",
"int",
"highest_priority(int pid, short nII, Trans *t)",
"{ int i = pid; uchar *othis = this;",
"",
"#ifdef VERI",
" if (nII == 0)",
" { return 1;", /* never claim */
" }",
"#endif",
"#ifdef HAS_PROVIDED",
" i = pid+BASE;", /* uncorrected process number */
"#endif",
" if (i < 0",
" || i >= (int) now._nr_pr",
"#ifdef HAS_PROVIDED",
" || !provided(i, (uchar) ((P0 *)this)->_t, (int) ((P0 *)this)->_p, t)",
"#endif",
" )",
" { return 0;",
" }",
"",
" for (i = BASE; i < now._nr_pr; i++)", /* all except never, if present */
" { this = pptr(i);",
" if (i != pid+BASE",
" && ((P0 *)this)->_priority > ((P0 *)pptr(pid+BASE))->_priority",
"#ifdef HAS_PROVIDED",
" && provided(i, (uchar) ((P0 *)this)->_t, (int) ((P0 *)this)->_p, 0)",
"#endif",
" && enabled(i+1, i-BASE))", /* enabled adds back BASE in 2nd arg */
" { this = othis;",
" return 0;",
" } }",
" this = othis;",
" return 1;",
"}",
"int",
"get_priority(int pid)",
"{ pid += BASE; /* 6.2.7 */",
" if (pid < 0 || pid >= (int) now._nr_pr)",
" return 0;",
" return ((P0 *)pptr(pid))->_priority;",
"}",
"int",
"set_priority(int pid, int pr)",
"{ pid += BASE; /* 6.2.7 */",
" if (pid < 0 || pid >= (int) now._nr_pr)",
" {",
" #ifdef VERBOSE",
" printf(\"warning: bad pid %%d, no such process (set_priority)\\n\", pid);",
" #endif",
" return 1;",
" }",
" if (pr < 1 || pr > 255)",
" { Uerror(\"priority is out of range\");",
" }",

" if (!TstOnly)",
" { (trpt+1)->o_priority = ",
" (((P0 *)pptr(pid))->_priority & 255) | (pid << 8);",
" ((P0 *)pptr(pid))->_priority = pr;",
" }",

" return 1;", /* always executable */
"}",
"#endif",
"",
"void",
"snap_time(void)",
"{ clock_t stop_time;",
" double delta_time;",
"#if !defined(WIN32) && !defined(WIN64)",
" struct tms stop_tm;",
" stop_time = times(&stop_tm);",
" delta_time = ((double) (stop_time - start_time)) / ((double) sysconf(_SC_CLK_TCK));",
"#else",
" stop_time = clock();",
" delta_time = ((double) (stop_time - start_time)) / ((double) CLOCKS_PER_SEC);",
"#endif",
" if (delta_time > 0.01)",
" { printf(\"t= %%8.3g \", delta_time);",
" printf(\"R= %%7.0g\", nstates/delta_time);",
" }",
" printf(\"\\n\");",
" if (quota > 0.1 && delta_time > quota)",
" { printf(\"Time limit of %%6.3g minutes exceeded\\n\", quota/60.0);",
"#if NCORE>1",
" fflush(stdout);",
" leave_critical(GLOBAL_LOCK);",
" sudden_stop(\"time-limit\");",
" exit(1);",
"#endif",
" wrapup();",
" }",
"}",
"void",
"snapshot(void)",
"{",
"#ifdef BFS_PAR",
" e_critical(BFS_GLOB); /* bfs_par / snapshot */",
" printf(\"cpu%%d: \", who_am_i);",
"#endif",
"#if NCORE>1",
" enter_critical(GLOBAL_LOCK); /* ncore / snapshot */",
" printf(\"cpu%%d: \", core_id);",
"#endif",
" printf(\"Depth= %%7ld States= %%8.3g \",",
"#if NCORE>1",
" (long) (nr_handoffs * z_handoff) +",
"#endif",
" mreached, nstates);",
" printf(\"Transitions= %%8.3g \", nstates+truncs);",
"#ifdef MA",
" printf(\"Nodes= %%7lu \", nr_states);",
"#endif",
" printf(\"Memory= %%9.3f\\t\", memcnt/1048576.);",
" snap_time();",
" fflush(stdout);",
"#if NCORE>1",
" leave_critical(GLOBAL_LOCK);",
"#endif",
"#ifdef BFS_PAR",
" x_critical(BFS_GLOB);",
"#endif",
"}",
"#ifdef SC",
"void",
"stack2disk(void)",
"{",
" if (!stackwrite",
" && (stackwrite = creat(stackfile, TMODE)) < 0)",
" Uerror(\"cannot create stackfile\");",
"",
" if (write(stackwrite, trail, DDD*sizeof(Trail))",
" != DDD*sizeof(Trail))",
" Uerror(\"stackfile write error -- disk is full?\");",
"",
" memmove(trail, &trail[DDD], (HHH-DDD+2)*sizeof(Trail));",
" memset(&trail[HHH-DDD+2], 0, (omaxdepth - HHH + DDD - 2)*sizeof(Trail));",
" CNT1++;",
"}",
"void",
"disk2stack(void)",
"{ long have;",
"",
" CNT2++;",
" memmove(&trail[DDD], trail, (HHH-DDD+2)*sizeof(Trail));",
"",
" if (!stackwrite",
" || lseek(stackwrite, -DDD* (off_t) sizeof(Trail), SEEK_CUR) == -1)",
" Uerror(\"disk2stack lseek error\");",
"",
" if (!stackread",
" && (stackread = open(stackfile, 0)) < 0)",
" Uerror(\"cannot open stackfile\");",
"",
" if (lseek(stackread, (CNT1-CNT2)*DDD* (off_t) sizeof(Trail), SEEK_SET) == -1)",
" Uerror(\"disk2stack lseek error\");",
"",
" have = read(stackread, trail, DDD*sizeof(Trail));",
" if (have != DDD*sizeof(Trail))",
" Uerror(\"stackfile read error\");",
"}",
"#endif",

"uchar *",
"Pptr(int x)",
"{ if (x < 0 || x >= MAXPROC", /* does not exist */
"#ifdef TRIX",
" || !processes[x])",
"#else",
" || !proc_offset[x])",
"#endif",
" return noptr;",
" else",
" return (uchar *) pptr(x);",
"}\n",
"uchar *",
"Qptr(int x)",
"{ if (x < 0 || x >= MAXQ",
"#ifdef TRIX",
" || !channels[x])",
"#else",
" || !q_offset[x])",
"#endif",
" return noqptr;",
" else",
" return (uchar *) qptr(x);",
"}\n",
"",
"#if NCLAIMS>1",
"void",
"select_claim(int n)",
"{ int m, i;",
" if (n < 0 || n >= NCLAIMS)",
" { uerror(\"non-existing claim\");",
" } else",
" { m = ((Pclaim *)pptr(0))->_n;",
" if (verbose)",
" { printf(\"%%d: Claim %%s (%%d), from state %%d\\n\",",
" (int) depth, procname[spin_c_typ[n]],",
" n, ((Pclaim *)pptr(0))->c_cur[n]);",
" } else",
" { printf(\"pan: ltl formula %%s\\n\",",
" procname[spin_c_typ[n]]);",
" }",
" ((Pclaim *)pptr(0))->c_cur[m] = ((Pclaim *)pptr(0))->_p;",
" ((Pclaim *)pptr(0))->_t = spin_c_typ[n];",
" ((Pclaim *)pptr(0))->_p = ((Pclaim *)pptr(0))->c_cur[n];",
" ((Pclaim *)pptr(0))->_n = n;",
" for (i = 0; src_all[i].src != (short *) 0; i++)",
" { if (src_all[i].tp == spin_c_typ[n])",
" { src_claim = src_all[i].src;",
" break;",
" } }",
" if (src_all[i].src == (short *) 0)",
" { uerror(\"cannot happen: src_ln ref\");",
" } }",
"}",
"#else",
"void",
"select_claim(int n)",
"{ if (n != 0) uerror(\"non-existing claim\");",
"}",
"#endif",

"int qs_empty(void);",
"#if !defined(BFS) && (!defined(BITSTATE) || !defined(MA))",
"#ifdef NSUCC",
"int N_succ[512];",
"void",
"tally_succ(int cnt)",
"{ if (cnt < 512) N_succ[cnt]++;",
" else printf(\"tally_succ: cnt %%d exceeds range\\n\", cnt);",
"}",
"",
"void",
"dump_succ(void)",
"{ int i; double sum = 0.0;",
" double w_avg = 0.0;",
" printf(\"Successor counts:\\n\");",
" for (i = 0; i < 512; i++)",
" { sum += (double) N_succ[i];",
" }",
" for (i = 0; i < 512; i++)",
" { if (N_succ[i] > 0)",
" { printf(\"%%3d\t%%10d\t(%%.4g %%%% of total)\\n\",",
" i, N_succ[i], (100.0 * (double) N_succ[i])/sum);",
" w_avg += (double) i * (double) N_succ[i];",
" } }",
" if (sum > N_succ[0])",
" printf(\"mean %%.4g (without 0: %%.4g)\\n\", w_avg / sum, w_avg / (sum - (double) N_succ[0]));",
"}",
"#endif",
"",
"#ifdef P_REVERSE",
" #define FROM_P (BASE)",
" #define UPTO_P (now._nr_pr-1)",
" #define MORE_P (II <= To)", /* p.o. only */
" #define INI_P (From-1)", /* fairness only */
" #define CNT_P (1 + (To - From))", /* P_RAND start */
" #define NDONE_P (From <= To)", /* P_RAND continue */
" #define ALL_P (II = From; II <= To; II++)",
"#else",
" #define FROM_P (now._nr_pr-1)",
" #define UPTO_P (BASE)",
" #define MORE_P (II >= BASE)",
" #define INI_P (From+1)",
" #define CNT_P (1 + (From - To))",
" #define NDONE_P (From >= To)",
" #define ALL_P (II = From; II >= To; II--)",
"#endif",
"",
"#ifdef PERMUTED",
" #define CONTINUE0 { if (reversing&2) { II = oII; } continue; }",
" #define CONTINUE { if (reversing&2) { p_reorder(seed); II = oII; } continue; }",
"#else",
" #define CONTINUE0 { continue; }",
" #define CONTINUE { continue; }",
"#endif",

"#ifdef PERMUTED",
"uchar _permutation_[256];",
"void",
"set_reversed(int unused)",
"{ int i, n = now._nr_pr;",
" #ifdef VERBOSE",
" printf(\"%%ld: Set_reversed\\n\", depth);",
" #endif",
" #if defined(VERI) && !defined(NOCLAIM)",
" for (i = 1; i < n; i++)",
" { _permutation_[i] = n-i;",
" }",
" #else",
" for (i = 0; i < n; i++)",
" { _permutation_[i] = n-1-i;",
" }",
" #endif",
"}",
"void",
"set_rotated(int unused)",
"{ int i, n = now._nr_pr;",
" #ifdef VERBOSE",
" printf(\"%%ld: Set_rotated %%d\\n\", depth, p_rotate);",
" #endif",
" #if defined(VERI) && !defined(NOCLAIM)",
" for (i = 1; i < n; i++)",
" { _permutation_[i] = 1+(i-1+p_rotate)%%(n-1);",
" }",
" #else",
" for (i = 0; i < n; i++)",
" { _permutation_[i] = (i+p_rotate)%%n;",
" }",
" #endif",
"}",
"void",
"set_randrot(int unused)",
"{",
" if (now._nr_pr > 1)",
" { p_rotate = 1+rand()%%(now._nr_pr-1);",
" } else",
" { p_rotate = 0;",
" }",
" set_rotated(0);",
"}",
"void",
"set_permuted(int T)",
"{ /* permute nrs 1..n-1, leave 0 in place */",
" int i, j, k, n = now._nr_pr;",
" char tmp, *in = &(_permutation_[0]);",
" #ifdef VERBOSE",
" printf(\"%%ld: Set_permuted %%d\\n\", depth, T);",
" #endif",
" srand(T);", /* set_permuted */
" for (i = 0; i < n; i++)",
" { in[i] = i;",
" }",
" if (n > 1)",
" { for (i = 0; i < n; i++)",
" {",
" #if defined(VERI) && !defined(NOCLAIM)",
" j = 1 + rand()%%(n-1);",
" k = 1 + rand()%%(n-1);",
" #else",
" j = rand()%%(n);",
" k = rand()%%(n);",
" #endif",
" tmp = in[j];",
" in[j] = in[k];",
" in[k] = tmp;",
" } }",
"}",
"",
" #ifdef VERBOSE",
" short",
" get_permuted(int x)",
" { printf(\"%%ld: Get_permuted %%d -> %%d\\n\",",
" depth, x, _permutation_[x]);",
" return (short) _permutation_[x];",
" }",
" #else",
" #define get_permuted(x) (short) _permutation_[x]",
" #endif",
"",
"#endif",
"/*",
" * new_state() is the main DFS search routine in the verifier",
" * it has a lot of code ifdef-ed together to support",
" * different search modes, which makes it quite unreadable.",
" * if you are studying the code, use the C preprocessor",
" * to generate a specific version from the pan.c source,",
" * e.g. by saying:",
" * gcc -E -DNOREDUCE -DBITSTATE pan.c > ppan.c",
" * and then study the resulting file, instead of this version",
" */",
"",
"void",
"new_state(void)",
"{ Trans *t;",
" uchar _n, _m, ot;",
"#ifdef T_RAND",
" short ooi, eoi;",
"#endif",
"#ifdef PERMUTED",
" short oII; uint seed;",
"#endif",
"#ifdef M_LOSS",
" uchar delta_m = 0;",
"#endif",
" short II, JJ = 0, kk;",
" int tt;",
" short From = FROM_P, To = UPTO_P;",
"#ifdef BCS",
" trpt->sched_limit = 0; /* at depth=0 only */",
"#endif",
"Down:",
"#ifdef CHECK",
" cpu_printf(\"%%d: Down - %%s %%saccepting [pids %%d-%%d]\\n\",",
" depth, (trpt->tau&4)?\"claim\":\"program\",",
" (trpt->o_pm&2)?\"\":\"non-\", From, To);",
"#endif",

"#ifdef P_RAND",
" trpt->p_skip = -1;",
"#endif",

"#ifdef SC",
" if (depth > hiwater)",
" { stack2disk();",
" maxdepth += DDD;",
" hiwater += DDD;",
" trpt -= DDD;",
" if(verbose)",
" printf(\"zap %%ld: %%ld (maxdepth now %%ld)\\n\",",
" CNT1, hiwater, maxdepth);",
" }",
"#endif",

" trpt->tau &= ~(16|32|64); /* make sure these are off */",
"#if defined(FULLSTACK) && defined(MA)",
" trpt->proviso = 0;",
"#endif",
"#ifdef NSUCC",
" trpt->n_succ = 0;",
"#endif",
"#if NCORE>1",
" if (mem_hand_off())",
" {",
"#if SYNC",
" (trpt+1)->o_n = 1; /* not a deadlock: as below */",
"#endif",
"#ifndef LOOPSTATE",
" (trpt-1)->tau |= 16; /* worstcase guess: as below */",
"#endif",
"#if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" }",
"#endif",
" goto Up;",
" }",
"#endif",

" if (depth >= maxdepth)",
" { if (!warned)",
" { warned = 1;",
" printf(\"error: max search depth too small\\n\");",
" }",
" if (bounded)",
" { uerror(\"depth limit reached\");",
" }",
" truncs++;",
"#if SYNC",
" (trpt+1)->o_n = 1; /* not a deadlock */",
"#endif",
"#ifndef LOOPSTATE",
" (trpt-1)->tau |= 16; /* worstcase guess */",
"#endif",

"#if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" }",
"#endif",
" goto Up;",
" }",
"AllOver:",
"#if (defined(FULLSTACK) && !defined(MA)) || NCORE>1",
" /* if atomic or rv move, carry forward previous state */",
" trpt->ostate = (trpt-1)->ostate;",
"#endif",
"#ifdef VERI",
" if ((trpt->tau&4) || ((trpt-1)->tau&128))",
"#endif",
" if (boq == -1) { /* if not mid-rv */",
"#ifndef SAFETY",
#if 0
we want to skip nrpr, nrqs, _a_t and cnt[NFAIR] (in the case of fairness)
this is calculated in S_A, but S_A subtracts 2 bytes,
because nrpr and nrqs are masked in the default state comparisons
so we add those two bytes back here
-- in default comparisons (h_store) we skip _a_t and cnt in the
-- first comparison to find a match on the base-state
-- the _a_t and cnt fields are then separately updated if there was
-- a match on the base state
#endif
" if ((now._a_t&1) && depth > A_depth)",
" { int delta = S_A + 2;",
" if (!memcmp((char *)&A_Root + delta, ",
" (char *)&now + delta, vsize - delta))",
" {",
"#ifndef NOFAIR",
" if (fairness && now._cnt[1] != 1) /* was > 1 */",
" {",
" #ifdef CHECK",
" printf(\"\tfairness count non-zero\\n\");",
" #endif",
" /* treat as new state */",
" } else",
"#endif",
" { depthfound = A_depth;",
" #ifdef CHECK",
" printf(\"matches seed\\n\");",
" #endif",
" #ifdef NP",
" uerror(\"non-progress cycle\");",
" #else",
" uerror(\"acceptance cycle\");",
" #endif",
" #if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" }",
" #endif",
" goto Up;",
" } }",
" #ifdef CHECK",
" else",
" {",
" printf(\"not seed\\n\");",
" }",
" #endif",
" }",
"#endif",
" if (!(trpt->tau&8)) /* if no atomic move */",
" {",
"#if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" uchar was_last = now._last;",
" now._last = 0; /* value not stored */",
"#endif",
"#ifdef BITSTATE",
"#ifdef CNTRSTACK", /* -> bitstate, reduced, safety */
" #if defined(BCS) && defined(STORE_CTX)",
" { int xj;",
" for (xj = trpt->sched_limit; xj <= sched_max; xj++)",
" { now._ctx = xj;",
" II = b_store((char *)&now, vsize);",
" trpt->j6 = j1_spin; trpt->j7 = j2_spin;",
" JJ = LL[j1_spin] && LL[j2_spin];",
" if (II != 0) { break; }",
" }",
" now._ctx = 0; /* just in case */",
" }",
" #else",
" II = b_store((char *)&now, vsize);",
" trpt->j6 = j1_spin; trpt->j7 = j2_spin;",
" JJ = LL[j1_spin] && LL[j2_spin];",
" #endif",
"#else",
" #ifdef FULLSTACK", /* b_store after onstack_now, to preserve j1-j4 */
" #if defined(BCS) && defined(STORE_CTX)",
" { int xj;",
" now._ctx = 0;",
" JJ = onstack_now();", /* mangles j1 */
" for (xj = trpt->sched_limit; xj <= sched_max; xj++)",
" { now._ctx = xj;",
" II = b_store((char *)&now, vsize);", /* sets j1-j4 */
" if (II != 0) { break; }",
" }",
" now._ctx = 0;",
" }",
" #else",
" JJ = onstack_now();", /* mangles j1 */
" II = b_store((char *)&now, vsize);", /* sets j1-j4 */
" #endif",
" #else",
" #if defined(BCS) && defined(STORE_CTX)",
" { int xj;",
" for (xj = trpt->sched_limit; xj <= sched_max; xj++)",
" { now._ctx = xj;",
" II = b_store((char *)&now, vsize);", /* sets j1-j4 */
" JJ = II; /* worstcase guess for p.o. - order corrected in 5.2.1 */",
" if (II != 0) { break; }",
" }",
" now._ctx = 0;",
" }",
" #else",
" II = b_store((char *)&now, vsize);", /* sets j1-j4 */
" JJ = II; /* worstcase guess for p.o. - order corrected in 5.2.1 */",
" #endif",
" #endif",
"#endif",
"#else",
"#ifdef MA",
" II = g_store((char *)&now, vsize, 0);",
"#ifndef FULLSTACK",
" JJ = II;",
"#else",
" JJ = (II == 2)?1:0;",
"#endif",
"#else",
" II = h_store((char *)&now, vsize);",
" /* @hash j1_spin II */",
"#ifdef FULLSTACK",
" JJ = (II == 2)?1:0;",
"#endif",
"#endif",
"#endif",
" kk = (II == 1 || II == 2);",
/* actually, BCS implies HAS_LAST */
"#if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" now._last = was_last; /* restore value */",
"#endif",

/* II==0 new state */
/* II==1 old state */
/* II==2 on current dfs stack */
/* II==3 on 1st dfs stack */
"#ifndef SAFETY",
/* with multicore we don't know which stack its on */
/* with HC there's a small chance of a false match - example fifoq 2012 */
"#if !defined(HC) && (NCORE==1 || defined (SEP_STATE))",
" if (II == 2 && ((trpt->o_pm&2) || ((trpt-1)->o_pm&2)))",
" #ifndef NOFAIR",
" if (a_cycles && !fairness) /* 5.1.6 -- example by Hirofumi Watanabe */",
" #endif",
" if (depth > A_depth) /* forum example by adl */",
" {",
" II = 3; /* Schwoon & Esparza 2005, Gastin&Moro 2004 */",
"#ifdef VERBOSE",
" printf(\"state match on dfs stack\\n\");",
"#endif",
" goto same_case;",
" }",
"#endif",

"#if defined(FULLSTACK) && defined(BITSTATE)",
" if (!JJ && (now._a_t&1) && depth > A_depth)",
" { int oj1 = j1_spin;",
" uchar o_a_t = now._a_t;",
" now._a_t &= ~(1|16|32);", /* 1st stack */
" if (onstack_now())", /* changes j1_spin */
" { II = 3;",
"#ifdef VERBOSE",
" printf(\"state match on 1st dfs stack\\n\");",
"#endif",
" }",
" now._a_t = o_a_t;", /* restore */
" j1_spin = oj1;",
" }",
"#endif",
" if (II == 3 && a_cycles && (now._a_t&1))",
" {",
"#ifndef NOFAIR",
" if (fairness && now._cnt[1] != 1) /* was > 1 */",
" {",
" #ifdef CHECK",
" printf(\"\tfairness count non-zero\\n\");",
" #endif",
" II = 0;", /* treat as new state */
" } else",
"#endif",
" {",
"#ifndef BITSTATE",
" nShadow--;",
"#endif",
"same_case: if (Lstate) depthfound = Lstate->D;",
"#ifdef NP",
" uerror(\"non-progress cycle\");",
"#else",
" uerror(\"acceptance cycle\");",
"#endif",
"#if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" }",
"#endif",
" goto Up;",
" }",
" }",
"#endif",

"#ifndef NOREDUCE",
" #ifndef SAFETY",
" #if NCORE>1 && !defined(SEP_STATE) && defined(V_PROVISO)",
" if (II != 0 && (!Lstate || Lstate->cpu_id < core_id))",
" { (trpt-1)->tau |= 16;", /* treat as a stack state */
" }",
" #endif",
" if ((II && JJ) || (II == 3))",
" { /* marker for liveness proviso */",
" #ifndef LOOPSTATE",
" (trpt-1)->tau |= 16;", /* truncated on stack */
" #endif",
" truncs2++;",
" }",
"#else",
" #if NCORE>1 && !defined(SEP_STATE) && defined(V_PROVISO)",
" if (!(II != 0 && (!Lstate || Lstate->cpu_id < core_id)))",
" { /* treat as stack state */",
" (trpt-1)->tau |= 16;",
" } else",
" { /* treat as non-stack state */",
" (trpt-1)->tau |= 64;",
" }",
" #endif",
" if (!II || !JJ)",
" { /* successor outside stack */",
" (trpt-1)->tau |= 64;",
" }",
" #endif",
"#endif",
"#if defined(BCS) && (defined(NOREDUCE) || !defined(SAFETY))",
/* needed for BCS - cover cases where it would not otherwise be set */
" if (!II || !JJ)",
" { (trpt-1)->tau |= 64;",
" }",
"#endif",
" if (II)",
" { truncs++;",
"#if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" if (depth == 0)",
" { return;",
" } }",
"#endif",
" goto Up;",
" }",
" if (!kk)",
" { static long sdone = (long) 0; long ndone;",
" nstates++;",
"#if defined(ZAPH) && defined(BITSTATE)",
" zstates += (double) hfns;",
"#endif",
" ndone = (ulong) (nstates/(freq));",
" if (ndone != sdone)",
" { snapshot();",
" sdone = ndone;",
"#if defined(AUTO_RESIZE) && !defined(BITSTATE) && !defined(MA)",
" if (nstates > ((double)(ONE_L<<(ssize+1))))",
" { void resize_hashtable(void);",
" resize_hashtable();",
" }",
"#endif",
"#if defined(ZAPH) && defined(BITSTATE)",
" if (zstates > ((double)(ONE_L<<(ssize-2))))",
" { /* more than half the bits set */",
" void zap_hashtable(void);",
" zap_hashtable();",
" zstates = 0;",
" }",
"#endif",
" }",
"#ifdef SVDUMP",
" if (vprefix > 0)",
" #ifdef SHO", /* Store Hash Only */
" /* always use the same hashfunction, for consistency across runs */",
" if (HASH_NR != 0)",
" { int oh = HASH_NR;",
" HASH_NR = 0;",
" d_hash((uchar *) &now, vsize); /* SHO - set K1 */",
" HASH_NR = oh;",
" }",
" if (write(svfd, (uchar *) &K1, sizeof(ulong)) != sizeof(ulong))",
" #else",
" if (write(svfd, (uchar *) &now, vprefix) != vprefix)",
" #endif",
" { fprintf(efd, \"writing %%s.svd failed\\n\", PanSource);",
" wrapup();",
" }",
"#endif",
"#if defined(MA) && defined(W_XPT)",
" if ((ulong) nstates%%W_XPT == 0)",
" { void w_xpoint(void);",
" w_xpoint();",
" }",
"#endif",
" }",

"#if defined(FULLSTACK) || defined(CNTRSTACK)",
" onstack_put();",
"#ifdef DEBUG2",
"#if defined(FULLSTACK) && !defined(MA)",
" printf(\"%%d: putting %%u (%%d)\\n\", depth,",
" trpt->ostate, ",
" (trpt->ostate)?trpt->ostate->tagged:0);",
"#else",
" printf(\"%%d: putting\\n\", depth);",
"#endif",
"#endif",
"#else",
" #if NCORE>1",
" trpt->ostate = Lstate;",
" #endif",
"#endif",
" } }",

" if (depth > mreached)",
" mreached = depth;",
"#ifdef VERI",
" if (trpt->tau&4)",
"#endif",
" trpt->tau &= ~(1|2); /* timeout and -request off */",
" _n = 0;",
"#if SYNC",
" (trpt+1)->o_n = 0;",
"#endif",
"#ifdef VERI",
" if (now._nr_pr == 0) /* claim terminated */",
" { uerror(\"end state in claim reached\");",
" }",
" if (stopstate[((Pclaim *)pptr(0))->_t][((Pclaim *)pptr(0))->_p])",
" { uerror(\"end state in claim reached\");",
" }",
"Stutter:",
" if (trpt->tau&4) /* must make a claimmove */",
" {",
" #ifndef NOFAIR",
" if ((now._a_t&2) /* A-bit set */",
" && now._cnt[now._a_t&1] == 1)",
" { now._a_t &= ~2;",
" now._cnt[now._a_t&1] = 0;",
" trpt->o_pm |= 16;",
"#ifdef DEBUG",
" printf(\"%%3d: fairness Rule 3.: _a_t = %%d\\n\",",
" (int) depth, now._a_t);",
"#endif",
" }",
" #endif",
" II = 0; /* never */",
" goto Veri0;",
" }",
"#endif",
"#ifdef PERMUTED",
" if (reversing&2)",
" { seed = rand();",
" p_reorder(seed);",
" }",
"#endif",
"#ifndef NOREDUCE",
" /* Look for a process with only safe transitions */",
" /* (special rules apply in the 2nd dfs) */",
" if (boq == -1 && From != To",
"",
"#ifdef SAFETY",
" #if NCORE>1",
" && (depth < z_handoff)", /* not for border states */
" #endif",
" )",
"#else",
" #if NCORE>1",
" && ((a_cycles) || (!a_cycles && depth < z_handoff))",
" #endif",
" #ifdef BCS",
" && (sched_max > 0 || depth > BASE)", /* no po in initial state if -L0 */
" #endif",
" && (!(now._a_t&1)",
" || (a_cycles &&",
" #ifndef BITSTATE",
"#ifdef MA",
"#ifdef VERI",
" !((trpt-1)->proviso))",
"#else",
" !(trpt->proviso))",
"#endif",
"#else",
"#ifdef VERI",
" (trpt-1)->ostate &&",
" !(((char *)&((trpt-1)->ostate->state))[0] & 128))", /* proviso bit in _a_t */
"#else",
" !(((char *)&(trpt->ostate->state))[0] & 128))",
"#endif",
"#endif",
" #else",
"#ifdef VERI",
" (trpt-1)->ostate &&",
" (trpt-1)->ostate->proviso == 0)",
"#else",
" trpt->ostate->proviso == 0)",
"#endif",
" #endif",
" ))",
"#endif", /* SAFETY */
" /* attempt Partial Order Reduction as preselect moves */",
"#ifdef BCS",
" if (trpt->sched_limit < sched_max)", /* po only if we can switch */
"#endif",
" { for ALL_P {", /* PO preselect */
"Resume: /* pick up here if preselect fails */",
" this = pptr(II);",
" tt = (int) ((P0 *)this)->_p;",
" ot = (uchar) ((P0 *)this)->_t;",
" if (trans[ot][tt]->atom & 8)",
" { t = trans[ot][tt];",
" if (t->qu[0] != 0)",
" { Ccheck++;",
" if (!q_cond(II, t))",
" { continue;",
" }",
" Cholds++;",
" }",
" From = To = II; /* preselect process */",
"#ifdef NIBIS",
" t->om = 0;",
"#endif",
" trpt->tau |= 32; /* preselect marker */",
"#ifdef DEBUG",
" printf(\"%%3ld: proc %%d PreSelected (tau=%%d)\\n\", ",
" depth, II, trpt->tau);",
"#endif",
" goto Again;",
" } else",
" { continue;",
" } } }",
" trpt->tau &= ~32;",
"#endif",
"#if !defined(NOREDUCE) || (defined(ETIM) && !defined(VERI))",
"Again:",
"#endif",
" trpt->o_pm &= ~(8|16|32|64); /* clear fairness-marks */",
"#ifndef NOFAIR",
" if (fairness && boq == -1",
"#ifdef VERI",
" && (!(trpt->tau&4) && !((trpt-1)->tau&128))",
"#endif",
" && !(trpt->tau&8))",
" { /* A_bit = 1; Cnt = N in acc states with A_bit 0 */",
" if (!(now._a_t&2))", /* A-bit not set */
" { if (a_cycles && (trpt->o_pm&2))",
" { /* Accepting state */",
" now._a_t |= 2;",
" now._cnt[now._a_t&1] = now._nr_pr + 1;",
" trpt->o_pm |= 8;",
"#ifdef DEBUG",
" printf(\"%%3ld: fairness Rule 1: cnt=%%d, _a_t=%%d\\n\",",
" depth, now._cnt[now._a_t&1], now._a_t);",
"#endif",
" }",
" } else", /* A-bit set */
" { /* A_bit = 0 when Cnt 0 */",
" if (now._cnt[now._a_t&1] == 1)",
" { now._a_t &= ~2;", /* reset a-bit */
" now._cnt[now._a_t&1] = 0;",
" trpt->o_pm |= 16;",
"#ifdef DEBUG",
" printf(\"%%3ld: fairness Rule 3: _a_t = %%d\\n\",",
" depth, now._a_t);",
"#endif",
" } } }",
"#endif",

"#ifdef BCS", /* bounded context switching */
" trpt->bcs = trpt->b_pno = 0; /* initial */",
" if (From != To /* not a PO or atomic move */",
" && depth > BASE) /* there is a prior move */",
" { trpt->b_pno = now._last + BASE;",
" trpt->bcs = B_PHASE1;",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS phase 1 proc %%d limit %%d\\n\",",
" depth, trpt->b_pno, trpt->sched_limit);",
" #endif",
" /* allow only process b_pno to move in this phase */",
" }",
"c_switch: /* jumps here with bcs == B_PHASE2 with or wo B_FORCED added */",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS c_switch phase=%%d pno=%%d [forced %%d]\\n\",",
" depth, trpt->bcs, trpt->b_pno, (trpt->bcs&B_FORCED)?1:0);",
" #endif",
"#endif",

"#ifdef P_RAND",
" trpt->p_left = CNT_P;",
" if (trpt->p_left > 1)",
" { trpt->p_skip = rand() %% (trpt->p_left);",
" } else",
" { trpt->p_skip = -1;",
" }",
"r_switch:",
" #ifdef VERBOSE",
" printf(\"%%3ld: P_RAND r_switch p_skip=%%d p_left=%%d\\n\",",
" depth, trpt->p_skip, trpt->p_left);",
" #endif",
"#endif",

" for ALL_P {", /* Main Loop */
"#ifdef PERMUTED",
" if (reversing&2)",
" { oII = II;",
" if (From != To)", /* not atomic or preselected */
" { II = get_permuted(II);",
" } }",
"#endif",
"#ifdef P_RAND",
" if (trpt->p_skip >= 0)",
" { trpt->p_skip--; /* skip random nr of procs */",
" #ifdef VERBOSE",
" printf(\"%%3ld: P_RAND skipping %%d [new p_skip=%%d p_left=%%d]\\n\",",
" depth, II, trpt->p_skip, trpt->p_left);",
" #endif",
" CONTINUE0;",
" }",
" if (trpt->p_left == 0)",
" {",
" #ifdef VERBOSE",
" printf(\"%%3ld: P_RAND done at %%d\\n\", depth, II);",
" #endif",
" break; /* done */",
" }",
" #ifdef VERBOSE",
" printf(\"%%3ld: P_RAND explore %%d [p_left=%%d]\\n\",",
" depth, II, trpt->p_left);",
" #endif",
" trpt->p_left--;",
"#endif",

"#if SYNC",
" /* no rendezvous with same proc */",
" if (boq != -1 && trpt->pr == II)",
" { CONTINUE0;",
" }",
"#endif",

"#ifdef BCS", /* never claim with II==0 cannot get here */
" if ((trpt->bcs & B_PHASE1)",
" && trpt->b_pno != II)",
" {",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS NotPre II=%%d bcs=%%d pno=%%d [forced %%d]\\n\",",
" depth, II, trpt->bcs, trpt->b_pno, (trpt->bcs&B_FORCED)?1:0);",
" #endif",
" CONTINUE0;", /* avoid context switch */
" }",
" #ifdef VERBOSE",
" else if ((trpt->bcs & B_PHASE1) && trpt->b_pno == II)",
" printf(\"%%3ld: BCS IsPre II=%%d bcs=%%d pno=%%d [forced %%d]\\n\",",
" depth, II, trpt->bcs, trpt->b_pno, (trpt->bcs&B_FORCED)?1:0);",
" #endif",

" if (trpt->bcs & B_PHASE2) /* 2nd phase */",
" { if (trpt->b_pno == II) /* was already done in phase 1 */",
" {",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS NoRepeat II=%%d bcs=%%d pno=%%d [forced %%d]\\n\",",
" depth, II, trpt->bcs, trpt->b_pno, (trpt->bcs&B_FORCED)?1:0);",
" #endif",
" CONTINUE0;",
" }",
" if (!(trpt->bcs & B_FORCED) /* unless forced */",
" && trpt->sched_limit >= sched_max)",
" {",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS Bound II=%%d bcs=%%d pno=%%d [forced %%d]\\n\",",
" depth, II, trpt->bcs, trpt->b_pno, (trpt->bcs&B_FORCED)?1:0);",
" #endif",
" CONTINUE0; /* enforce bound */",
" } }",
"#endif",

"#ifdef VERI",
"Veri0:",
"#endif",
" this = pptr(II);",
" tt = (int) ((P0 *)this)->_p;",
" ot = (uchar) ((P0 *)this)->_t;",

"#ifdef NIBIS",
" /* don't repeat a previous preselected expansion */",
" /* could hit this if reduction proviso was false */",
" t = trans[ot][tt];",
" if (!(trpt->tau&4)", /* not claim */
" && !(trpt->tau&1)", /* not timeout */
" && !(trpt->tau&32)", /* not preselected */
" && (t->atom & 8)", /* local */
" && boq == -1", /* not inside rendezvous */
" && From != To)", /* not inside atomic seq */
" { if (t->qu[0] == 0", /* unconditional */
" || q_cond(II, t))", /* true condition */
" { _m = t->om;",
" if (_m>_n||(_n>3&&_m!=0))",
" { _n=_m;",
" }",
" CONTINUE0; /* did it before */",
" } }",
"#endif",
" trpt->o_pm &= ~1; /* no move in this pid yet */",
"#ifdef EVENT_TRACE",
" (trpt+1)->o_event = now._event;",
"#endif",
" /* Fairness: Cnt++ when Cnt == II */",
"#ifndef NOFAIR",
" trpt->o_pm &= ~64; /* didn't apply rule 2 */",
" if (fairness",
" && boq == -1", /* not mid rv - except rcv - NEW 3.0.8 */
" && !(trpt->o_pm&32)", /* Rule 2 not in effect */
" && (now._a_t&2)", /* A-bit is set */
" && now._cnt[now._a_t&1] == II+2)",
" { now._cnt[now._a_t&1] -= 1;",
"#ifdef VERI",
" /* claim need not participate */",
" if (II == 1)",
" now._cnt[now._a_t&1] = 1;",
"#endif",
"#ifdef DEBUG",
" printf(\"%%3ld: proc %%d fairness \", depth, II);",
" printf(\"Rule 2: --cnt to %%d (%%d)\\n\",",
" now._cnt[now._a_t&1], now._a_t);",
"#endif",
" trpt->o_pm |= (32|64);",
" }",
"#endif",

"#ifdef HAS_PRIORITY",
" if (!highest_priority(((P0 *)this)->_pid, II, t))",
" { CONTINUE0;",
" }",
"#else",
" #ifdef HAS_PROVIDED",
" if (!provided(II, ot, tt, t))",
" { CONTINUE0;",
" }",
" #endif",
"#endif",

" /* check all trans of proc II - escapes first */",
"#ifdef HAS_UNLESS",
" trpt->e_state = 0;",
"#endif",
" (trpt+1)->pr = (uchar) II;", /* for uerror */
" (trpt+1)->st = tt;",

"#ifdef T_RAND",
" for (ooi = eoi = 0, t = trans[ot][tt]; t; t = t->nxt, ooi++)",
" { if (strcmp(t->tp, \"else\") == 0",
" #ifdef HAS_UNLESS",
" || t->e_trans != 0",
" #endif",
" )",
" { eoi++;", /* no break, must count ooi */
" } }",
" if (eoi > 0)",
" { t = trans[ot][tt];",
" #ifdef VERBOSE",
" printf(\"randomizer: suppressed, saw else or escape\\n\");",
" #endif",
" } else if (ooi > 0)",
" { eoi = rand()%%ooi;",
" #ifdef VERBOSE",
" printf(\"randomizer: skip %%d in %%d\\n\", eoi, ooi);",
" #endif",
" for (t = trans[ot][tt]; t; t = t->nxt)",
" if (eoi-- <= 0) break;",
" }",
"domore:",
" for ( ; t && ooi > 0; t = t->nxt, ooi--)",
"#else", /* ie dont randomize */
" for (t = trans[ot][tt]; t; t = t->nxt)",
"#endif",
" {",
"#ifdef HAS_UNLESS",
" /* exploring all transitions from",
" * a single escape state suffices",
" */",
" if (trpt->e_state > 0",
" && trpt->e_state != t->e_trans)",
" {",
"#ifdef DEBUG",
" printf(\"skip 2nd escape %%d (did %%d before)\\n\",",
" t->e_trans, trpt->e_state);",
"#endif",
" break;",
" }",
"#endif",
" #if defined(TRIX) && !defined(TRIX_ORIG) && !defined(BFS)",
" (trpt+1)->p_bup = now._ids_[II];",
" #endif",
" (trpt+1)->o_t = t;", /* for uerror */
"#ifdef INLINE",
"#include FORWARD_MOVES",
"P999: /* jumps here when move succeeds */",
"#else",
" if (!(_m = do_transit(t, II)))",
" { continue;",
" }",
"#endif",
"#ifdef BCS",
" if (depth > BASE", /* has prior move */
" && II >= BASE", /* not claim */
" && From != To", /* not atomic or po */
" #ifndef BCS_NOFIX",
" /* added 5.2.5: prior move was not po */",
" && !((trpt-(BASE+1))->tau & 32)",
" #endif",
" && boq == -1", /* not rv */
" && (trpt->bcs & B_PHASE2)",
" && trpt->b_pno != II /* context switch */", /* redundant */
" && !(trpt->bcs & B_FORCED)) /* unless forced */",
" { (trpt+1)->sched_limit = 1 + trpt->sched_limit;",
" #ifdef VERBOSE",
" printf(\"%%3ld: up sched count to %%d\\n\", depth, (trpt+1)->sched_limit);",
" #endif",
" } else",
" { (trpt+1)->sched_limit = trpt->sched_limit;",
" #ifdef VERBOSE",
" printf(\"%%3ld: keep sched count at %%d\\n\", depth, (trpt+1)->sched_limit);",
" #endif",
" }",
"#endif",
" if (boq == -1)",
"#ifdef CTL",
" /* for branching-time, can accept reduction only if */",
" /* the persistent set contains just 1 transition */",
" { if ((trpt->tau&32) && (trpt->o_pm&1))",
" trpt->tau |= 16;", /* CTL */
" trpt->o_pm |= 1; /* we moved */",
" }",
"#else",
" trpt->o_pm |= 1; /* we moved */",
"#endif",

"#ifdef LOOPSTATE",
" if (loopstate[ot][tt])",
" {",
"#ifdef VERBOSE",
" printf(\"exiting from loopstate:\\n\");",
"#endif",
" trpt->tau |= 16;", /* exiting loopstate */
" cnt_loops++;",
" }",
"#endif",

"#ifdef PEG",
" peg[t->forw]++;",
"#endif",
"#if defined(VERBOSE) || defined(CHECK)",
"#if defined(SVDUMP)",
" cpu_printf(\"%%3ld: proc %%d exec %%d \\n\", depth, II, t->t_id);",
"#else",
" cpu_printf(\"%%3ld: proc %%d exec %%d, %%d to %%d, %%s %%s %%s %%saccepting [tau=%%d]\\n\", ",
" depth, II, t->forw, tt, t->st, t->tp,",
" (t->atom&2)?\"atomic\":\"\",",
" (boq != -1)?\"rendez-vous\":\"\",",
" (trpt->o_pm&2)?\"\":\"non-\", trpt->tau);",
"#ifdef HAS_UNLESS",
" if (t->e_trans)",
" cpu_printf(\"\\t(escape to state %%d)\\n\", t->st);",
"#endif",
"#endif",
"#ifdef T_RAND",
" cpu_printf(\"\\t(randomizer %%d)\\n\", ooi);",
"#endif",
"#endif",

"#ifdef HAS_LAST",
"#ifdef VERI",
" if (II != 0)",
"#endif",
" now._last = II - BASE;",
"#endif",
"#ifdef HAS_UNLESS",
" trpt->e_state = t->e_trans;",
"#endif",

" depth++; trpt++;",
" trpt->pr = (uchar) II;",
" trpt->st = tt;",
" trpt->o_pm &= ~(2|4);",
" if (t->st > 0)",
" { ((P0 *)this)->_p = t->st;",
"/* moved down reached[ot][t->st] = 1; */",
" }",
"#ifndef SAFETY",
" if (a_cycles)",
" {",
"#if (ACCEPT_LAB>0 && !defined(NP)) || (PROG_LAB>0 && defined(HAS_NP))",
" int ii;",
"#endif",
"#define P__Q ((P0 *)pptr(ii))",
"#if ACCEPT_LAB>0",
"#ifdef NP",
" /* state 1 of np_ claim is accepting */",
" if (((P0 *)pptr(0))->_p == 1)",
" trpt->o_pm |= 2;",
"#else",
" for (ii = 0; ii < (int) now._nr_pr; ii++)",
" { if (accpstate[P__Q->_t][P__Q->_p])",
" { trpt->o_pm |= 2;",
" break;",
" } }",
"#endif",
"#endif",
"#if defined(HAS_NP) && PROG_LAB>0",
" for (ii = 0; ii < (int) now._nr_pr; ii++)",
" { if (progstate[P__Q->_t][P__Q->_p])",
" { trpt->o_pm |= 4;",
" break;",
" } }",
"#endif",
"#undef P__Q",
" }",
"#endif",
" trpt->o_t = t; trpt->o_n = _n;",
" trpt->o_ot = ot; trpt->o_tt = tt;",
" trpt->o_To = To; trpt->o_m = _m;",
" trpt->tau = 0;",
"#ifdef PERMUTED",
" if (reversing&2)",
" { trpt->seed = seed;",
" trpt->oII = oII;",
" }",
"#endif",

"#if defined(T_RAND) && !defined(BFS)",
" trpt->oo_i = ooi;",
"#endif",
" if (boq != -1 || (t->atom&2))",
" { trpt->tau |= 8;",
"#ifdef VERI",
" /* atomic sequence in claim */",
" if((trpt-1)->tau&4)",
" trpt->tau |= 4;",
" else",
" trpt->tau &= ~4;",
" } else",
" { if ((trpt-1)->tau&4)",
" trpt->tau &= ~4;",
" else",
" trpt->tau |= 4;",
" }",
" /* if claim allowed timeout, so */",
" /* does the next program-step: */",
" if (((trpt-1)->tau&1) && !(trpt->tau&4))",
" trpt->tau |= 1;",
"#else",
" } else",
" trpt->tau &= ~8;",
"#endif",
" if (boq == -1 && (t->atom&2))",
" { From = To = II; nlinks++;",
" } else",
" { From = FROM_P; To = UPTO_P;",
" }",
"#if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Push_Stack_Tree(II, t->t_id);",
" }",
"#endif",
"#ifdef TRIX",
" if (processes[II])", /* last move could have been a delproc */
" { processes[II]->modified = 1; /* transition in II */",
" #ifdef V_TRIX",
" printf(\"%%4d: process %%d modified\\n\", depth, II);",
" } else",
" { printf(\"%%4d: process %%d modified but gone (%%p)\\n\",",
" depth, II, trpt);",
" #endif",
" }",
"#endif",
" goto Down; /* pseudo-recursion */",
"Up:",
"#ifdef TRIX",
" #ifndef TRIX_ORIG",
" #ifndef BFS",
" now._ids_[trpt->pr] = trpt->p_bup;",
" #endif",
" #else",
" if (processes[trpt->pr])",
" {",
" processes[trpt->pr]->modified = 1; /* reverse move */",
" #ifdef V_TRIX",
" printf(\"%%4d: unmodify pr %%d (%%p)\\n\",",
" depth, trpt->pr, trpt);",
" } else",
" { printf(\"%%4d: unmodify pr %%d (gone) (%%p)\\n\",",
" depth, trpt->pr, trpt);",
" #endif",
" }",
" #endif",
"#endif",
"#ifdef CHECK",
" cpu_printf(\"%%d: Up - %%s\\n\", depth,",
" (trpt->tau&4)?\"claim\":\"program\");",
"#endif",
"#if NCORE>1",
" iam_alive();",
" #ifdef USE_DISK",
" mem_drain();",
" #endif",
"#endif",
"#if defined(MA) || NCORE>1",
" if (depth <= 0) return;",
" /* e.g., if first state is old, after a restart */",
"#endif",

"#ifdef SC",
" if (CNT1 > CNT2",
" && depth < hiwater - (HHH-DDD) - 2)", /* 5.1.6: was + 2 */
" {",
" trpt += DDD;",
" disk2stack();",
" maxdepth -= DDD;",
" hiwater -= DDD;",
" if(verbose)",
" printf(\"unzap %%ld: %%ld\\n\", CNT2, hiwater);",
" }",
"#endif",

"#ifndef SAFETY", /* moved earlier in version 5.2.5 */
" if ((now._a_t&1) && depth <= A_depth)",
" return; /* to checkcycles() */",
"#endif",

"#ifndef NOFAIR",
" if (trpt->o_pm&128) /* fairness alg */",
" { now._cnt[now._a_t&1] = trpt->bup.oval;",
" _n = 1; trpt->o_pm &= ~128;",
" depth--; trpt--;",
"#if defined(VERBOSE) || defined(CHECK)",
" printf(\"%%3ld: reversed fairness default move\\n\", depth);",
"#endif",
" goto Q999;",
" }",
"#endif",

"#ifdef HAS_LAST",
"#ifdef VERI",
" { long d; Trail *trl;",
" now._last = 0;",
" for (d = 1; d < depth; d++)",
" { trl = getframe(depth-d); /* was (trpt-d) */",
" if (trl->pr != 0)",
" { now._last = trl->pr - BASE;",
" break;",
" } } }",
"#else",
" now._last = (depth<1)?0:(trpt-1)->pr;",
"#endif",
"#endif",
"#ifdef EVENT_TRACE",
" now._event = trpt->o_event;",
"#endif",
" t = trpt->o_t; _n = trpt->o_n;",
" ot = trpt->o_ot; II = trpt->pr;",
" tt = trpt->o_tt; this = Pptr(II);",
" To = trpt->o_To; _m = trpt->o_m;",
"#ifdef PERMUTED",
" if (reversing&2)",
" { seed = trpt->seed;",
" oII = trpt->oII;",
" }",
"#endif",
"#if defined(T_RAND) && !defined(BFS)",
" ooi = trpt->oo_i;",
"#endif",
"#ifdef INLINE_REV",
" _m = do_reverse(t, II, _m);",
"#else",
"#include BACKWARD_MOVES",
"R999: /* jumps here when done */",
"#endif",

"#ifdef VERBOSE",
" cpu_printf(\"%%3ld: proc %%d reverses %%d, %%d to %%d\\n\",",
" depth, II, t->forw, tt, t->st);",
" cpu_printf(\"\\t%%s [abit=%%d,adepth=%%ld,tau=%%d,%%d]\\n\", ",
" t->tp, now._a_t, A_depth, trpt->tau, (trpt-1)->tau);",
"#endif",
"#ifndef NOREDUCE",
" /* pass the proviso tags */",
" if ((trpt->tau&8) /* rv or atomic */",
" && (trpt->tau&16))",
" (trpt-1)->tau |= 16;", /* pass upward */
" #ifdef SAFETY",
" if ((trpt->tau&8) /* rv or atomic */",
" && (trpt->tau&64))",
" (trpt-1)->tau |= 64;",
" #endif",
"#endif",

"#if defined(BCS) && (defined(NOREDUCE) || !defined(SAFETY))",
/* for BCS, cover cases where 64 is otherwise not handled */
" if ((trpt->tau&8)",
" && (trpt->tau&64))",
" (trpt-1)->tau |= 64;",
"#endif",

" depth--; trpt--;",
"",
"#ifdef NSUCC",
" trpt->n_succ++;",
"#endif",
"#ifdef NIBIS",
" (trans[ot][tt])->om = _m; /* head of list */",
"#endif",

" /* i.e., not set if rv fails */",
" if (_m)",
" { reached[ot][t->st] = 1;",
" reached[ot][tt] = 1;",
" }",
"#ifdef HAS_UNLESS",
" else trpt->e_state = 0; /* undo */",
"#endif",

" if (_m>_n||(_n>3&&_m!=0)) _n=_m;",
" ((P0 *)this)->_p = tt;",
" } /* all options */",

"#ifdef T_RAND",
" if (!t && ooi > 0)", /* means we skipped some initial options */
" { t = trans[ot][tt];",
" #ifdef VERBOSE",
" printf(\"randomizer: continue for %%d more\\n\", ooi);",
" #endif",
" goto domore;",
" }",
" #ifdef VERBOSE",
" else",
" printf(\"randomizer: done\\n\");",
" #endif",
"#endif",

"#ifndef NOFAIR",
" /* Fairness: undo Rule 2 */",
" if ((trpt->o_pm&32)",/* rule 2 was applied */
" && (trpt->o_pm&64))",/* by this process II */
" { if (trpt->o_pm&1)",/* it didn't block */
" {",
"#ifdef VERI",
" if (now._cnt[now._a_t&1] == 1)",
" now._cnt[now._a_t&1] = 2;",
"#endif",
" now._cnt[now._a_t&1] += 1;",
"#ifdef VERBOSE",
" printf(\"%%3ld: proc %%d fairness \", depth, II);",
" printf(\"undo Rule 2, cnt=%%d, _a_t=%%d\\n\",",
" now._cnt[now._a_t&1], now._a_t);",
"#endif",
" trpt->o_pm &= ~(32|64);",
" } else", /* process blocked */
" { if (_n > 0)", /* a prev proc didn't */
" {", /* start over */
" trpt->o_pm &= ~64;",
" II = INI_P;", /* after loop incr II == From */
" } } }",
"#endif",
"#ifdef VERI",
" if (II == 0)",
" { break; /* never claim */",
" }",
"#endif",
" CONTINUE;",
" } /* ALL_P */",

"#ifdef NSUCC",
" tally_succ(trpt->n_succ);",
"#endif",

"#ifdef P_RAND",
" if (trpt->p_left > 0 && NDONE_P)",
" { trpt->p_skip = -1; /* probably rendundant */",
" #ifdef VERBOSE",
" printf(\"%%3ld: P_RAND -- explore remainder\\n\", depth);",
" #endif",
" goto r_switch; /* explore the remaining procs */",
" } else",
" {",
" #ifdef VERBOSE",
" printf(\"%%3ld: P_RAND -- none left\\n\", depth);",
" #endif",
" }",
"#endif",

"#ifdef BCS",
" if (trpt->bcs & B_PHASE1)",
" { trpt->bcs = B_PHASE2; /* start 2nd phase */",
" if (_n == 0 || !(trpt->tau&64)) /* pre-move unexecutable or led to stackstate */",
" { trpt->bcs |= B_FORCED; /* forced switch */",
" }",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS move to phase 2, _n=%%d %%s\\n\", depth, _n,",
" (trpt->bcs & B_FORCED)?\"forced\":\"free\");",
" #endif",
" From = FROM_P; To = UPTO_P;",
" goto c_switch;",
" }",
"",
" if (_n == 0 /* no process could move */",
" && II >= BASE /* not the never claim */",
" && trpt->sched_limit >= sched_max)",
" { _n = 1;",
" #ifdef VERBOSE",
" printf(\"%%3ld: BCS not a deadlock\\n\", depth);",
" #endif",
" }",
"#endif",

"#ifndef NOFAIR",
" /* Fairness: undo Rule 2 */",
" if (trpt->o_pm&32) /* remains if proc blocked */",
" {",
"#ifdef VERI",
" if (now._cnt[now._a_t&1] == 1)",
" now._cnt[now._a_t&1] = 2;",
"#endif",
" now._cnt[now._a_t&1] += 1;",
"#ifdef VERBOSE",
" printf(\"%%3ld: proc -- fairness \", depth);",
" printf(\"undo Rule 2, cnt=%%d, _a_t=%%d\\n\",",
" now._cnt[now._a_t&1], now._a_t);",
"#endif",
" trpt->o_pm &= ~32;",
" }",
"#ifndef NP",
/* 12/97 non-progress cycles cannot be created
* by stuttering extension, here or elsewhere
*/
" if (fairness",
" && _n == 0 /* nobody moved */",
"#ifdef VERI",
" && !(trpt->tau&4) /* in program move */",
"#endif",
" && !(trpt->tau&8) /* not an atomic one */",
"#ifdef ETIM",
" && (trpt->tau&1) /* already tried timeout */",
"#endif",
"#ifndef NOREDUCE",
" /* see below */",
" && !((trpt->tau&32) && (_n == 0 || (trpt->tau&16)))",
"#endif",
" && now._cnt[now._a_t&1] > 0) /* needed more procs */",
" { depth++; trpt++;",
" trpt->o_pm |= 128 | ((trpt-1)->o_pm&(2|4));",
" trpt->bup.oval = now._cnt[now._a_t&1];",
" now._cnt[now._a_t&1] = 1;",
"#ifdef VERI",
" trpt->tau = 4;",
"#else",
" trpt->tau = 0;",
"#endif",
" From = FROM_P; To = UPTO_P;",
"#if defined(VERBOSE) || defined(CHECK)",
" printf(\"%%3ld: fairness default move \", depth);",
" printf(\"(all procs block)\\n\");",
"#endif",
" goto Down;",
" }",
"#endif",
"Q999: /* returns here with _n>0 when done */;",

" if (trpt->o_pm&8)",
" { now._a_t &= ~2;",
" now._cnt[now._a_t&1] = 0;",
" trpt->o_pm &= ~8;",
"#ifdef VERBOSE",
" printf(\"%%3ld: fairness undo Rule 1, _a_t=%%d\\n\",",
" depth, now._a_t);",
"#endif",
" }",
" if (trpt->o_pm&16)",
" { now._a_t |= 2;", /* restore a-bit */
" now._cnt[now._a_t&1] = 1;", /* NEW: restore cnt */
" trpt->o_pm &= ~16;",
"#ifdef VERBOSE",
" printf(\"%%3ld: fairness undo Rule 3, _a_t=%%d\\n\",",
" depth, now._a_t);",
"#endif",
" }",
"#endif",

"#ifndef NOREDUCE",
"#ifdef SAFETY",
" #ifdef LOOPSTATE",
" /* at least one move that was preselected at this */",
" /* level, blocked or was a loop control flow point */",
" if ((trpt->tau&32) && (_n == 0 || (trpt->tau&16)))",
" #else",
" /* preselected move - no successors outside stack */",
" if ((trpt->tau&32) && !(trpt->tau&64))",
" #endif",
" { From = FROM_P; To = UPTO_P; /* undo From == To */",
" #ifdef DEBUG",
" printf(\"%%3ld: proc %%d UnSelected (_n=%%d, tau=%%d)\\n\", ",
" depth, II+1, _n, trpt->tau);",
" #endif",
" _n = 0; trpt->tau &= ~(16|32|64);",

" if (MORE_P) /* II already restored and updated */",
" { goto Resume;",
" } else",
" { goto Again;",
" } }",
"#else",
" /* at least one move that was preselected at this */",
" /* level, blocked or truncated at the next level */",
" if ((trpt->tau&32) && (_n == 0 || (trpt->tau&16)))",
" {",
" #ifdef DEBUG",
" printf(\"%%3ld: proc %%d UnSelected (_n=%%d, tau=%%d)\\n\", ",
" depth, II+1, (int) _n, trpt->tau);",
" #endif",
" if (a_cycles && (trpt->tau&16))",
" { if (!(now._a_t&1))",
" {",
" #ifdef DEBUG",
" printf(\"%%3ld: setting proviso bit\\n\", depth);",
" #endif",
"#ifndef BITSTATE",
"#ifdef MA",
"#ifdef VERI",
" (trpt-1)->proviso = 1;",
"#else",
" trpt->proviso = 1;",
"#endif",
"#else",
"#ifdef VERI",
" if ((trpt-1)->ostate)",
" ((char *)&((trpt-1)->ostate->state))[0] |= 128;",
"#else",
" ((char *)&(trpt->ostate->state))[0] |= 128;",
"#endif",
"#endif",
"#else",
"#ifdef VERI",
" if ((trpt-1)->ostate)",
" (trpt-1)->ostate->proviso = 1;",
"#else",
" trpt->ostate->proviso = 1;",
"#endif",
"#endif",
" From = FROM_P; To = UPTO_P;",
" _n = 0; trpt->tau &= ~(16|32|64);",
" goto Again; /* do full search */",
" } /* else accept reduction */",
" } else",
" { From = FROM_P; To = UPTO_P;",
" _n = 0; trpt->tau &= ~(16|32|64);",
" if (MORE_P) /* II already updated */",
" { goto Resume;",
" } else",
" { goto Again;",
" } } }",
"#endif",
"#endif",

" if (_n == 0 || ((trpt->tau&4) && (trpt->tau&2)))",
" {",
"#ifdef DEBUG",
" cpu_printf(\"%%3ld: no move [II=%%d, tau=%%d, boq=%%d]\\n\",",
" depth, II, trpt->tau, boq);",
"#endif",
"#if SYNC",
" /* ok if a rendez-vous fails: */",
" if (boq != -1) goto Done;",
"#endif",
" /* ok if no procs or we're at maxdepth */",
" if ((now._nr_pr == 0 && (!strict || qs_empty()))",
" || depth >= maxdepth-1) goto Done; /* undo change from 5.2.3 */",

" if ((trpt->tau&8) && !(trpt->tau&4))",
" { trpt->tau &= ~(1|8);",
" /* 1=timeout, 8=atomic */",
" From = FROM_P; To = UPTO_P;",
"#ifdef DEBUG",
" cpu_printf(\"%%3ld: atomic step proc %%d unexecutable\\n\", depth, II+1);",
"#endif",
"#ifdef VERI",
" trpt->tau |= 4; /* switch to claim */",
"#endif",
" goto AllOver;",
" }",

"#ifdef ETIM",
" if (!(trpt->tau&1)) /* didn't try timeout yet */",
" {",
"#ifdef VERI",
" if (trpt->tau&4)",
" {",
"#ifndef NTIM",
" if (trpt->tau&2) /* requested */",
"#endif",
" { trpt->tau |= 1;",
" trpt->tau &= ~2;",
" #ifdef DEBUG",
" cpu_printf(\"%%d: timeout\\n\", depth);",
" #endif",
" goto Stutter;",
" } }",
" else",
" { /* only claim can enable timeout */",
" if ((trpt->tau&8)",
" && !((trpt-1)->tau&4))",
"/* blocks inside an atomic */ goto BreakOut;",
" #ifdef DEBUG",
" cpu_printf(\"%%d: req timeout\\n\",",
" depth);",
" #endif",
" (trpt-1)->tau |= 2; /* request */",
" #if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" }",
" #endif",
" goto Up;",
" }",
"#else",
" #ifdef DEBUG",
" cpu_printf(\"%%d: timeout\\n\", depth);",
" #endif",
" trpt->tau |= 1;",
" goto Again;",
"#endif",
" }",
"#endif",

/* old location of atomic block code */
"#ifdef VERI",
"BreakOut:",
"#ifndef NOSTUTTER",
" if (!(trpt->tau&4))",
" { trpt->tau |= 4; /* claim stuttering */",
" trpt->tau |= 128; /* stutter mark */",
"#ifdef DEBUG",
" cpu_printf(\"%%d: claim stutter\\n\", depth);",
"#endif",
" goto Stutter;",
" }",
"#else",
" ;",
"#endif",
"#else",
" if (!noends && !a_cycles && !endstate())",
" { depth--; trpt--; /* new 4.2.3 */",
" uerror(\"invalid end state\");",
" depth++; trpt++;",
" }",
"#ifndef NOSTUTTER",
" else if (a_cycles && (trpt->o_pm&2)) /* new 4.2.4 */",
" { depth--; trpt--;",
" uerror(\"accept stutter\");",
" depth++; trpt++;",
" }",
"#endif",
"#endif",
" }",
"Done:",
" if (!(trpt->tau&8)) /* not in atomic seqs */",
" {",

"#ifndef MA",
"#if defined(FULLSTACK) || defined(CNTRSTACK)",
"#ifdef VERI",
" if (boq == -1",
" && (((trpt->tau&4) && !(trpt->tau&128))",
" || ( (trpt-1)->tau&128)))",
"#else",
" if (boq == -1)",
"#endif",
" {",
"#ifdef DEBUG2",
"#if defined(FULLSTACK)",
" printf(\"%%ld: zapping %%u (%%d)\\n\",",
" depth, trpt->ostate,",
" (trpt->ostate)?trpt->ostate->tagged:0);",
"#endif",
"#endif",
" onstack_zap();",
" }",
"#endif",
"#else",
"#ifdef VERI",
" if (boq == -1",
" && (((trpt->tau&4) && !(trpt->tau&128))",
" || ( (trpt-1)->tau&128)))",
"#else",
" if (boq == -1)",
"#endif",
" {",
"#ifdef DEBUG",
" printf(\"%%ld: zapping\\n\", depth);",
"#endif",
" onstack_zap();",
"#ifndef NOREDUCE",
" if (trpt->proviso)",
" g_store((char *) &now, vsize, 1);",
"#endif",
" }",
"#endif",

"#ifndef SAFETY",
" if (_n != 0", /* we made a move */
"#ifdef VERI",
" /* --after-- a program-step, i.e., */",
" /* after backtracking a claim-step */",
" && (trpt->tau&4)",
" /* with at least one running process */",
" /* unless in a stuttered accept state */",
" && ((now._nr_pr > 1) || (trpt->o_pm&2))",
"#endif",
" && !(now._a_t&1))", /* not in 2nd DFS */
" {",
"#ifndef NOFAIR",
" if (fairness)", /* implies a_cycles */
" {",
"#ifdef VERBOSE",
" cpu_printf(\"Consider check %%d %%d...\\n\",",
" now._a_t, now._cnt[0]);",
"#endif",
#if 0
the a-bit is set, which means that the fairness
counter is running -- it was started in an accepting state.
we check that the counter reached 1, which means that all
processes moved least once.
this means we can start the search for cycles -
to be able to return to this state, we should be able to
run down the counter to 1 again -- which implies a visit to
the accepting state -- even though the Seed state for this
search is itself not necessarily accepting
#endif
" if ((now._a_t&2) /* A-bit */",
" && (now._cnt[0] == 1))",
" checkcycles();",
" } else",
"#endif",
" if (a_cycles && (trpt->o_pm&2))",
" checkcycles();",
" }",
"#endif",
" }",
" if (depth > 0)",
" {",
"#if NCORE>1 && defined(FULL_TRAIL)",
" if (upto > 0)",
" { Pop_Stack_Tree();",
" }",
"#endif",
" goto Up;",
" }",
"}\n",
"#else",
"void new_state(void) { /* place holder */ }",
"#endif", /* BFS */
"",
"void",
"spin_assert(int a, char *s, int ii, int tt, Trans *t)",
"{",
" if (!a && !noasserts)",
" { char bad[1024];",
" strcpy(bad, \"assertion violated \");",
" if (strlen(s) > 1000)",
" { strncpy(&bad[19], (const char *) s, 1000);",
" bad[1019] = '\\0';",
" } else",
" strcpy(&bad[19], s);",
" uerror(bad);",
" }",
"}",
"#ifndef NOBOUNDCHECK",
"int",
"Boundcheck(int x, int y, int a1, int a2, Trans *a3)",
"{",
" spin_assert((x >= 0 && x < y), \"- invalid array index\",",
" a1, a2, a3);",
" return x;",
"}",
"#endif",
"int do_hashgen = 0;",
"void",
"wrap_stats(void)",
"{",
" if (nShadow>0)",
" printf(\"%%9.8g states, stored (%%g visited)\\n\",",
" nstates - nShadow, nstates);",
" else",
" printf(\"%%9.8g states, stored\\n\", nstates);",
"#ifdef BFS_PAR",
" if (bfs_punt > 0)",
" printf(\"%%9.8g states lost (lack of queue memory)\\n\", (double) bfs_punt);",
"#endif",
"#ifdef BFS",
" #if SYNC",
" printf(\" %%8g nominal states (- rv and atomic)\\n\", nstates-midrv-nlinks+revrv);",
" printf(\" %%8g rvs succeeded\\n\", midrv-failedrv);",
" #else",
" printf(\" %%8g nominal states (stored-atomic)\\n\", nstates-nlinks);",
" #endif",
" #ifdef DEBUG",
" printf(\" %%8g midrv\\n\", midrv);",
" printf(\" %%8g failedrv\\n\", failedrv);",
" printf(\" %%8g revrv\\n\", revrv);",
" #endif",
"#endif",
" printf(\"%%9.8g states, matched\\n\", truncs);",
"#ifdef CHECK",
" printf(\"%%9.8g matches within stack\\n\",truncs2);",
"#endif",
" if (nShadow>0)",
" printf(\"%%9.8g transitions (= visited+matched)\\n\",",
" nstates+truncs);",
" else",
" printf(\"%%9.8g transitions (= stored+matched)\\n\",",
" nstates+truncs);",
" printf(\"%%9.8g atomic steps\\n\", nlinks);",
" if (nlost) printf(\"%%g lost messages\\n\", (double) nlost);",
"",
"#ifndef BITSTATE",
" #ifndef MA",
" printf(\"hash conflicts: %%9.8g (resolved)\\n\", hcmp);",
" #if !defined(AUTO_RESIZE) && !defined(BFS_PAR)",
" if (hcmp > (double) (1<<ssize))",
" { printf(\"hint: increase hashtable-size (-w) to reduce runtime\\n\");",
" }",
" #endif",
" #if defined(BFS_PAR) && defined(HC)",
" { double fp = (100. * (double) nstates)/((double) ((ulong) (1<<ssize)));",
" int fi = 0;",
" printf(\"the hash table is %%3.3g %%%% filled\", fp);",
" if (fp > 1.0)",
" { fp = 100. / fp;",
" while (fp > 2.) { fi++; fp /= 2.; }",
" if (fi > 0)",
" { printf(\" (hint: rerun with -w%%d to reduce runtime)\",",
" ssize-fi);",
" } }",
" printf(\"\\n\");",
" }",
" #endif",
" #endif",
"#else",
"#ifdef CHECK",
" printf(\"%%8g states allocated for dfs stack\\n\", ngrabs);",
"#endif",
" if (udmem)",
" printf(\"\\nhash factor: %%4g (best if > 100.)\\n\\n\",",
" (double)(((double) udmem) * 8.0) / (double) nstates);",
" else",
" printf(\"\\nhash factor: %%4g (best if > 100.)\\n\\n\",",
" ((double)(((ulong)1)<<(ssize-10)) / (double) nstates) * 1024.0);",
/* the -10 and *1024 stuff is to avoid overflow */
" printf(\"bits set per state: %%u (-k%%u)\\n\", hfns, hfns);",
" if (do_hashgen)",
" printf(\"hash polynomial used: 0x%%.8x\\n\", HASH_CONST[HASH_NR]);",
" if (s_rand != 12345)",
" printf(\"random seed used: %%u\\n\", (uint) (s_rand-1));",
"#endif",
"#if defined(BFS_DISK) && !defined(BFS_PAR)",
" printf(\"bfs disk reads: %%ld writes %%ld -- diff %%ld\\n\",",
" bfs_dsk_reads, bfs_dsk_writes, bfs_dsk_writes-bfs_dsk_reads);",
" if (bfs_dsk_read >= 0) (void) close(bfs_dsk_read);",
" if (bfs_dsk_write >= 0) (void) close(bfs_dsk_write);",
" (void) unlink(\"pan_bfs_dsk.tmp\");",
"#endif",
"}",
"",
"void",
"wrapup(void)",
"{ double nr1, nr2, nr3 = 0.0, nr4, nr5 = 0.0;",
"#ifdef BFS_PAR",
" if (who_am_i != 0)",
" { pan_exit(0);",
" }",
"#endif",
"#if NCORE>1",
" if (verbose) cpu_printf(\"wrapup -- %%d error(s)\\n\", errors);",
" if (core_id != 0)",
" {",
" #ifdef USE_DISK",
" void dsk_stats(void);",
" dsk_stats();",
" #endif",
" if (search_terminated != NULL)",
" { *search_terminated |= 2; /* wrapup */",
" }",
" exit(0); /* normal termination, not an error */",
" }",
"#endif",
"#if !defined(WIN32) && !defined(WIN64)",
" signal(SIGINT, SIG_DFL);",
"#endif",
" printf(\"\\n(%%s)\\n\", SpinVersion);",
" if (!done) printf(\"Warning: Search not completed\\n\");",
"#if defined(BFS_PAR) && !defined(BITSTATE)",
" if (bfs_punt > 0) printf(\"Warning: Search incomplete\\n\");",
"#endif",
"#ifdef SC",
" (void) unlink((const char *)stackfile);",
"#endif",
"#ifdef BFS_PAR",
" printf(\" + Multi-Core (using %%d cores)\\n\", Cores);",
" #ifdef BFS_SEP_HASH",
" printf(\" + Separate Hash Tables\\n\");",
" #endif",
" #ifdef BFS_DISK",
" printf(\" + Disk storage\\n\");",
" #endif",
"#endif",
"#if NCORE>1",
" if (a_cycles)",
" { printf(\" + Multi-Core (NCORE=%%d)\\n\", NCORE);",
" } else",
" { printf(\" + Multi-Core (NCORE=%%d -z%%ld)\\n\", NCORE, z_handoff);",
" }",
"#endif",
"#ifdef BFS",
" printf(\" + Breadth-First Search\\n\");",
"#endif",
"#ifndef NOREDUCE",
" printf(\" + Partial Order Reduction\\n\");",
"#endif",
"#ifdef PERMUTED",
" printf(\" + Process Scheduling Permutation\\n\");",
"#endif",
"#ifdef P_REVERSE",
" printf(\" + Reverse Depth-First Search Order\\n\");",
"#endif",
" if (t_reverse)",
" printf(\" + Reverse Transition Ordering\\n\");",
"#ifdef T_RAND",
" printf(\" + Randomized Transition Ordering\\n\");",
"#endif",
"#ifdef P_RAND",
" printf(\" + Randomized Process Ordering\\n\");",
"#endif",
"#ifdef BCS",
" printf(\" + Scheduling Restriction (-L%%d)\\n\", sched_max);",
"#endif",
"#ifdef TRIX",
" printf(\" + Tree Index Compression\\n\");",
"#endif",
"#ifdef COLLAPSE",
" printf(\" + Compression\\n\");",
"#endif",
"#ifdef MA",
" printf(\" + Graph Encoding (-DMA=%%d)\\n\", MA);",
" #ifdef R_XPT",
" printf(\" Restarted from checkpoint %%s.xpt\\n\", PanSource);",
" #endif",
"#endif",
"#ifdef CHECK",
" #ifdef FULLSTACK",
" printf(\" + FullStack Matching\\n\");",
" #endif",
" #ifdef CNTRSTACK",
" printf(\" + CntrStack Matching\\n\");",
" #endif",
"#endif",
"#ifdef PERMUTED",
" if (reversing & 2)",
" { if (p_reorder == set_permuted)",
" { printf(\" + Permuted\\n\");",
" }",
" if (p_reorder == set_reversed)",
" { printf(\" + Reversed\\n\");",
" }",
" if (p_reorder == set_rotated)",
" { printf(\" + Rotated %%d\\n\", p_rotate);",
" }",
" if (p_reorder == set_randrot)",
" { printf(\" + RandRotated\\n\");",
" } }",
"#endif",
"#ifdef BITSTATE",
" printf(\"\\nBit statespace search for:\\n\");",
"#else",
" #ifdef HC",
" printf(\"\\nHash-Compact %%d search for:\\n\", HC);",
" #else",
" printf(\"\\nFull statespace search for:\\n\");",
" #endif",
"#endif",
"#ifdef EVENT_TRACE",
"#ifdef NEGATED_TRACE",
" printf(\"\tnotrace assertion \t+\\n\");",
"#else",
" printf(\"\ttrace assertion \t+\\n\");",
"#endif",
"#endif",
"#ifdef VERI",
" printf(\"\tnever claim \t+\");",
" printf(\" (%%s)\\n\", procname[((Pclaim *)pptr(0))->_t]);",
" printf(\"\tassertion violations\t\");",
" if (noasserts)",
" printf(\"- (disabled by -A flag)\\n\");",
" else",
" printf(\"+ (if within scope of claim)\\n\");",
"#else",
"#ifdef NOCLAIM",
" printf(\"\tnever claim \t- (not selected)\\n\");",
"#else",
" printf(\"\tnever claim \t- (none specified)\\n\");",
"#endif",
" printf(\"\tassertion violations\t\");",
" if (noasserts)",
" printf(\"- (disabled by -A flag)\\n\");",
" else",
" printf(\"+\\n\");",
"#endif",
"#ifndef SAFETY",
"#ifdef NP",
" printf(\"\tnon-progress cycles \t\");",
"#else",
" printf(\"\tacceptance cycles \t\");",
"#endif",
" if (a_cycles)",
" printf(\"+ (fairness %%sabled)\\n\",",
" fairness?\"en\":\"dis\");",
" else printf(\"- (not selected)\\n\");",
"#else",
" #if !defined(BFS_PAR) || !defined(L_BOUND)",
" printf(\"\tcycle checks \t- (disabled by -DSAFETY)\\n\");",
" #else",
" printf(\"\tcycle checks \t+ (bound %%d)\\n\", L_bound);",
" #endif",
"#endif",
"#ifdef VERI",
" printf(\"\tinvalid end states\t- \");",
" printf(\"(disabled by \");",
" if (noends)",
" printf(\"-E flag)\\n\\n\");",
" else",
" printf(\"never claim)\\n\\n\");",
"#else",
" printf(\"\tinvalid end states\t\");",
" if (noends)",
" printf(\"- (disabled by -E flag)\\n\\n\");",
" else",
" printf(\"+\\n\\n\");",
"#endif",
" printf(\"State-vector %%d byte, depth reached %%ld\", hmax,",
"#if NCORE>1",
" (nr_handoffs * z_handoff) +",
"#endif",
" mreached);",
" printf(\", errors: %%d\\n\", errors);",
" fflush(stdout);",
"#ifdef MA",
" if (done)",
" { extern void dfa_stats(void);",
" if (maxgs+a_cycles+2 < MA)",
" printf(\"MA stats: -DMA=%%d is sufficient\\n\",",
" maxgs+a_cycles+2);",
" dfa_stats();",
" }",
"#endif",
" wrap_stats();",
"#ifdef CHECK",
" printf(\"stackframes: %%d/%%d\\n\\n\", smax, svmax);",
" printf(\"stats: fa %%ld, fh %%ld, zh %%ld, zn %%ld - \",",
" Fa, Fh, Zh, Zn);",
" printf(\"check %%ld holds %%ld\\n\", Ccheck, Cholds);",
" printf(\"stack stats: puts %%ld, probes %%ld, zaps %%ld\\n\",",
" PUT, PROBE, ZAPS);",
"#else",
" printf(\"\\n\");",
"#endif",
"",
"#if !defined(BITSTATE) && defined(NOCOMP)",
" if (!verbose) { goto jump_here; }", /* added 5.2.0 */
"#endif",
"",
"#if 1", /* omitted 5.2.0: defined(BITSTATE) || !defined(NOCOMP) */
" nr1 = (nstates-nShadow)*",
" (double)(hmax+sizeof(H_el)-sizeof(unsigned));",
" #ifdef BFS",
" nr2 = 0.0;",
" #else",
" nr2 = (double) ((maxdepth+3)*sizeof(Trail));",
" #endif",

" #ifndef BITSTATE",
"#if !defined(MA) || defined(COLLAPSE)",
" nr3 = (double) (ONE_L<<ssize)*sizeof(H_el *);",
"#endif",
" #else",
" if (udmem)",
" nr3 = (double) (udmem);",
" else",
" nr3 = (double) (ONE_L<<(ssize-3));",
"#ifdef CNTRSTACK",
" nr5 = (double) (ONE_L<<(ssize-3));",
"#endif",
"#ifdef FULLSTACK",
" nr5 = (double) (maxdepth*sizeof(H_el *));",
"#endif",
" #endif",

" nr4 = (double) (svmax * (sizeof(Svtack) + hmax))",
" + (double) (smax * (sizeof(_Stack) + Maxbody * sizeof(char)));",
"#ifndef MA",
" if (1 /* verbose || memcnt < nr1+nr2+nr3+nr4+nr5 */)",
"#endif",
" { double remainder = memcnt;",
" double tmp_nr = memcnt-nr3-nr4-(nr2-fragment)-nr5;",
"",
" #if NCORE>1 && !defined(SEP_STATE)",
" tmp_nr -= ((double) NCORE * LWQ_SIZE) + GWQ_SIZE;",
" #endif",
" if (tmp_nr < 0.0) tmp_nr = 0.;",
" printf(\"Stats on memory usage (in Megabytes):\\n\");",
" printf(\"%%9.3f\tequivalent memory usage for states\",",
" nr1/1048576.); /* 1024*1024=1048576 */",
" printf(\" (stored*(State-vector + overhead))\\n\");",
" #if NCORE>1 && !defined(WIN32) && !defined(WIN64)",
" printf(\"%%9.3f\tshared memory reserved for state storage\\n\",",
" mem_reserved/1048576.);",
" #ifdef SEP_HEAP",
" printf(\"\t\tin %%d local heaps of %%7.3f MB each\\n\",",
" NCORE, mem_reserved/(NCORE*1048576.));",
" #endif",
" printf(\"\\n\");",
" #endif",
" #ifdef BITSTATE",
" if (udmem)",
" printf(\"%%9.3f\tmemory used for hash array (-M%%ld)\\n\",",
" nr3/1048576., udmem/(1024L*1024L));",
" else",
" printf(\"%%9.3f\tmemory used for hash array (-w%%d)\\n\",",
" nr3/1048576., ssize);",
" if (nr5 > 0.0)",
" printf(\"%%9.3f\tmemory used for bit stack\\n\",",
" nr5/1048576.);",
" remainder = remainder - nr3 - nr5;",
" #else",
" #ifndef USE_TDH",
" printf(\"%%9.3f\tactual memory usage for states\",",
" tmp_nr/1048576.);",
" remainder -= tmp_nr;",
" if (tmp_nr > 0.)",
" { if (tmp_nr < nr1) ",
" { printf(\" (compression: %%.2f%%%%)\\n\",",
" (100.0*tmp_nr)/nr1);",
" } else",
" { printf(\"\\n\");",
" }",
" } else",
" { printf(\" (less than 1k)\\n\");",
" }",
" #ifndef MA",
" if (tmp_nr > 0. && tmp_nr < nr1)",
" { printf(\" \tstate-vector as stored = %%.0f byte\",",
" (tmp_nr)/(nstates-nShadow) -",
" (double) (sizeof(H_el) - sizeof(unsigned)));",
" printf(\" + %%ld byte overhead\\n\",",
" (long int) sizeof(H_el)-sizeof(unsigned));",
" }",
" #endif",
" #endif",
" #if !defined(MA) || defined(COLLAPSE)",
" #ifdef BFS_PAR",
" printf(\"%%9.3f\tshared memory used for hash table (-w%%d)\\n\",",
" ((double) bfs_pre_allocated)/1048576., ssize);",
" #else",
" printf(\"%%9.3f\tmemory used for hash table (-w%%d)\\n\",",
" nr3/1048576., ssize);",
" remainder -= nr3;",
" #endif",
" #endif",
" #endif",
" #ifndef BFS",
" printf(\"%%9.3f\tmemory used for DFS stack (-m%%ld)\\n\",",
" nr2/1048576., maxdepth);",
" remainder -= nr2;",
" #endif",
" #if NCORE>1",
" remainder -= ((double) NCORE * LWQ_SIZE) + GWQ_SIZE;",
" printf(\"%%9.3f\tshared memory used for work-queues\\n\",",
" (GWQ_SIZE + (double) NCORE * LWQ_SIZE) /1048576.);",
" printf(\"\t\tin %%d queues of %%7.3f MB each\",",
" NCORE, (double) LWQ_SIZE /1048576.);",
" #ifndef NGQ",
" printf(\" + a global q of %%7.3f MB\\n\",",
" (double) GWQ_SIZE / 1048576.);",
" #else",
" printf(\"\\n\");",
" #endif",
" #endif",
" if (remainder - fragment > 1048576.)",
" { printf(\"%%9.3f\tother (proc and chan stacks)\\n\",",
" (remainder-fragment)/1048576.);",
" }",
" if (fragment > 1048576.)",
" { printf(\"%%9.3f\tmemory lost to fragmentation\\n\",",
" fragment/1048576.);",
" }",
" #ifdef BFS_PAR",
" printf(\"%%9.3f\ttotal non-shared memory usage\\n\\n\",",
" memcnt/1048576.);",
" #else",
" printf(\"%%9.3f\ttotal actual memory usage\\n\\n\",",
" memcnt/1048576.);",
" #endif",
" }",
" #ifndef MA",
" else",
" #endif",
"#endif",

"#if !defined(BITSTATE) && defined(NOCOMP)",
"jump_here:",
"#endif",
"#ifndef MA",
" printf(\"%%9.3f\tmemory usage (Mbyte)\\n\",",
" memcnt/1048576.);",
"#endif",
"#ifdef BFS_PAR",
" bfs_report_mem();",
"#else",
" printf(\"\\n\");",
"#endif",
"#ifdef COLLAPSE",
" printf(\"nr of templates: [ 0:globals 1:chans 2:procs ]\\n\");",
" printf(\"collapse counts: [ \");",
" { int i; for (i = 0; i < 256+2; i++)",
" if (ncomps[i] != 0)",
" printf(\"%%d:%%lu \", i, ncomps[i]);",
" printf(\"]\\n\");",
" }",
"#endif",
" #ifdef TRIX",
" if (verbose)",
" { int i;",
" printf(\"TRIX counts:\\n\");",
" printf(\" processes: \");",
" for (i = 0; i < MAXPROC; i++)",
" if (_p_count[i] != 0)",
" { printf(\"%%3d:%%ld \",",
" i, _p_count[i]);",
" }",
" printf(\"\\n channels : \");",
" for (i = 0; i < MAXQ; i++)",
" if (_c_count[i] != 0)",
" { printf(\"%%3d:%%ld \",",
" i, _c_count[i]);",
" }",
" printf(\"\\n\\n\");",
" }",
" #endif",

" if ((done || verbose) && !no_rck) do_reach();",
"#ifdef PEG",
" { int i;",
" printf(\"\\nPeg Counts (transitions executed):\\n\");",
" for (i = 1; i < NTRANS; i++)",
" { if (peg[i]) putpeg(i, peg[i]);",
" } }",
"#endif",
"#ifdef VAR_RANGES",
" dumpranges();",
"#endif",
"#ifdef SVDUMP",
" if (vprefix > 0) close(svfd);",
"#endif",
"#ifdef LOOPSTATE",
" printf(\"%%g loopstates hit\\n\", cnt_loops);",
"#endif",
"#ifdef NSUCC",
" dump_succ();",
"#endif",
"#if NCORE>1 && defined(T_ALERT)",
" crash_report();",
"#endif",
"#ifndef BFS_PAR",
" pan_exit(0);",
"#endif",
"}\n",
"void",
"stopped(int arg)",
"{",
"#ifdef BFS_PAR",
" bfs_shutdown(\"interrupted\");",
"#endif",
" printf(\"Interrupted\\n\");",
"#if NCORE>1",
" was_interrupted = 1;",
"#endif",
" wrapup();",
" pan_exit(0);",
"}",
"",
"/*",
" * super fast hash, based on Paul Hsieh's function",
" * http://www.azillionmonkeys.com/qed/hash.html",
" */",
"#include <stdint.h>", /* for uint32_t etc */
" #undef get16bits",
" #if defined(__GNUC__) && defined(__i386__)",
" #define get16bits(d) (*((const uint16_t *) (d)))",
" #else",
" #define get16bits(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8)\\",
" +(uint32_t)(((const uint8_t *)(d))[0]) )",
" #endif",
"",
"void",
"d_sfh(uchar *s, int len)", /* sets one 32-bit number, in K1 */
"{ uint32_t h = len, tmp;",
" int rem;",
"",
" rem = len & 3;",
" len >>= 2;",
"",
" for ( ; len > 0; len--)",
" { h += get16bits(s);",
" tmp = (get16bits(s+2) << 11) ^ h;",
" h = (h << 16) ^ tmp;",
" s += 2*sizeof(uint16_t);",
" h += h >> 11;",
" }",
" switch (rem) {",
" case 3: h += get16bits(s);",
" h ^= h << 16;",
" h ^= s[sizeof(uint16_t)] << 18;",
" h += h >> 11;",
" break;",
" case 2: h += get16bits(s);",
" h ^= h << 11;",
" h += h >> 17;",
" break;",
" case 1: h += *s;",
" h ^= h << 10;",
" h += h >> 1;",
" break;",
" }",
" h ^= h << 3;",
" h += h >> 5;",
" h ^= h << 4;",
" h += h >> 17;",
" h ^= h << 25;",
" h += h >> 6;",
"",
" K1 = h;",
"}",
"",
"#if WS>4",
"/* 64-bit Jenkins hash, 1997",
" * http://burtleburtle.net/bob/c/lookup8.c",
" */",
"#define mix(a,b,c) \\",
"{ a -= b; a -= c; a ^= (c>>43); \\",
" b -= c; b -= a; b ^= (a<<9); \\",
" c -= a; c -= b; c ^= (b>>8); \\",
" a -= b; a -= c; a ^= (c>>38); \\",
" b -= c; b -= a; b ^= (a<<23); \\",
" c -= a; c -= b; c ^= (b>>5); \\",
" a -= b; a -= c; a ^= (c>>35); \\",
" b -= c; b -= a; b ^= (a<<49); \\",
" c -= a; c -= b; c ^= (b>>11); \\",
" a -= b; a -= c; a ^= (c>>12); \\",
" b -= c; b -= a; b ^= (a<<18); \\",
" c -= a; c -= b; c ^= (b>>22); \\",
"}",
"#else",
"/* 32-bit Jenkins hash, 2006",
" * http://burtleburtle.net/bob/c/lookup3.c",
" */",
"#define rot(x,k) (((x)<<(k))|((x)>>(32-(k))))",
"",
"#define mix(a,b,c) \\",
"{ a -= c; a ^= rot(c, 4); c += b; \\",
" b -= a; b ^= rot(a, 6); a += c; \\",
" c -= b; c ^= rot(b, 8); b += a; \\",
" a -= c; a ^= rot(c,16); c += b; \\",
" b -= a; b ^= rot(a,19); a += c; \\",
" c -= b; c ^= rot(b, 4); b += a; \\",
"}",
"",
"#define final(a,b,c) \\",
"{ c ^= b; c -= rot(b,14); \\",
" a ^= c; a -= rot(c,11); \\",
" b ^= a; b -= rot(a,25); \\",
" c ^= b; c -= rot(b,16); \\",
" a ^= c; a -= rot(c,4); \\",
" b ^= a; b -= rot(a,14); \\",
" c ^= b; c -= rot(b,24); \\",
"}",
"#endif",
"",
"void",
"d_hash(uchar *kb, int nbytes)", /* sets two 64-bit or 32-bit nrs, depending on WS */
"{ uint8_t *bp;",
"#if WS>4",
" uint64_t a = 0, b, c, n;",
" const uint64_t *k = (uint64_t *) kb;",
"#else",
" uint32_t a = 0, b, c, n;",
" const uint32_t *k = (uint32_t *) kb;",
"#endif",
" n = nbytes/WS; /* nr of words */",
" /* extend to multiple of words, if needed */",
" a = WS - (nbytes %% WS);",
" if (a > 0 && a < WS)",
" { n++;",
" bp = kb + nbytes;",
" switch (a) {",
"#if WS>4",
" case 7: *bp++ = 0; /* fall thru */",
" case 6: *bp++ = 0; /* fall thru */",
" case 5: *bp++ = 0; /* fall thru */",
" case 4: *bp++ = 0; /* fall thru */",
"#endif",
" case 3: *bp++ = 0; /* fall thru */",
" case 2: *bp++ = 0; /* fall thru */",
" case 1: *bp = 0;",
" case 0: break;",
" } }",
"#if WS>4",
" b = HASH_CONST[HASH_NR];",
" c = 0x9e3779b97f4a7c13LL; /* arbitrary value */",
" while (n >= 3)",
" { a += k[0];",
" b += k[1];",
" c += k[2];",
" mix(a,b,c);",
" n -= 3;",
" k += 3;",
" }",
" c += (((uint64_t) nbytes)<<3);",
" switch (n) {",
" case 2: b += k[1];",
" case 1: a += k[0];",
" case 0: break;",
" }",
" mix(a,b,c);",
"#else", /* 32 bit version: */
" a = c = 0xdeadbeef + (n<<2);",
" b = HASH_CONST[HASH_NR];",
" while (n > 3)",
" { a += k[0];",
" b += k[1];",
" c += k[2];",
" mix(a,b,c);",
" n -= 3;",
" k += 3;",
" }",
" switch (n) { ",
" case 3: c += k[2];",
" case 2: b += k[1];",
" case 1: a += k[0];",
" final(a,b,c);",
" case 0: break;",
" }",
"#endif",
" j1_spin = c&nmask; j3_spin = a&7; /* 1st bit */",
" j2_spin = b&nmask; j4_spin = (a>>3)&7; /* 2nd bit */",
" K1 = c; K2 = b;",
"}",
"",
"#if defined(MURMUR) && (WS==8)",
"/* public-domain, 64-bit MurmurHash3, by Austin Appleby */",
"/* https://code.google.com/p/smhasher/wiki/MurmurHash3 */",
"void",
"m_hash(uchar *v, int len)",
"{ uint8_t *bp, *data = (uint8_t*) v;",
" int i, nblocks = len / 16;",
"",
" uint64_t h1 = HASH_CONST[HASH_NR];",
" uint64_t h2 = 0x9e3779b97f4a7c13LL;",
"",
" uint64_t c1 = 0x87c37b91114253d5;",
" uint64_t c2 = 0x4cf5ad432745937f;",
"",
" uint64_t *blocks = (uint64_t *)(data);",
"",
" /* guarantee a multiple of 16 bytes */",
" i = 16 - (len %% 16);",
" if (i > 0 && i < 16)",
" { nblocks++;",
" bp = v + len;",
" switch (i) {",
" case 15: *bp++ = 0; /* fall thru */",
" case 14: *bp++ = 0;",
" case 13: *bp++ = 0;",
" case 12: *bp++ = 0;",
" case 11: *bp++ = 0;",
" case 10: *bp++ = 0;",
" case 9: *bp++ = 0;",
" case 8: *bp++ = 0;",
" case 7: *bp++ = 0;",
" case 6: *bp++ = 0;",
" case 5: *bp++ = 0;",
" case 4: *bp++ = 0;",
" case 3: *bp++ = 0;",
" case 2: *bp++ = 0;",
" case 1: *bp = 0;",
" case 0: break;",
" } }",
"",
" for (i = 0; i < nblocks; i++)",
" { uint64_t k1 = blocks[i*2];",
" uint64_t k2 = blocks[i*2+1];",
"",
" k1 *= c1;",
" k1 = (k1 << 31) | (k1 >> 33);",
" k1 *= c2;",
" h1 ^= k1;",
"",
" h1 = (h1 << 27) | (h1 >> 37);",
" h1 += h2;",
" h1 = h1 * 5 + 0x52dce729;",
"",
" k2 *= c2;",
" k2 = (k2 << 33) | (k2 >> 31);",
" k2 *= c1;",
" h2 ^= k2;",
"",
" h2 = (h2 << 31) | (h2 >> 33);",
" h2 += h1;",
" h2 = h2 * 5 + 0x38495ab5;",
" }",
"",
" uint8_t *tail = (uint8_t*)(data + (nblocks * 16));",
"",
" uint64_t k1 = 0;",
" uint64_t k2 = 0;",
"",
" switch(len & 15) {",
" case 15: k2 ^= ((uint64_t) tail[14]) << 48; break;",
" case 14: k2 ^= ((uint64_t) tail[13]) << 40; break;",
" case 13: k2 ^= ((uint64_t) tail[12]) << 32; break;",
" case 12: k2 ^= ((uint64_t) tail[11]) << 24; break;",
" case 11: k2 ^= ((uint64_t) tail[10]) << 16; break;",
" case 10: k2 ^= ((uint64_t) tail[ 9]) << 8; break;",
" case 9: k2 ^= ((uint64_t) tail[ 8]) << 0; break;",
" k2 *= c2;",
" k2 = (k2 << 33) | (k2 >> 31);",
" k2 *= c1;",
" h2 ^= k2; break;",
" case 8: k1 ^= ((uint64_t) tail[7]) << 56; break;",
" case 7: k1 ^= ((uint64_t) tail[6]) << 48; break;",
" case 6: k1 ^= ((uint64_t) tail[5]) << 40; break;",
" case 5: k1 ^= ((uint64_t) tail[4]) << 32; break;",
" case 4: k1 ^= ((uint64_t) tail[3]) << 24; break;",
" case 3: k1 ^= ((uint64_t) tail[2]) << 16; break;",
" case 2: k1 ^= ((uint64_t) tail[1]) << 8; break;",
" case 1: k1 ^= ((uint64_t) tail[0]) << 0; break;",
" k1 *= c1;",
" k1 = (k1 << 31) | (k1 >> 33);",
" k1 *= c2;",
" h1 ^= k1;",
" };",
"",
" h1 ^= len; h2 ^= len;",
" h1 += h2;",
" h2 += h1;",
" h1 ^= h1 >> 33;",
" h1 *= 0xff51afd7ed558ccd;",
" h1 ^= h1 >> 33;",
" h1 *= 0xc4ceb9fe1a85ec53;",
" h1 ^= h1 >> 33;",
" h2 ^= h2 >> 33;",
" h2 *= 0xff51afd7ed558ccd;",
" h2 ^= h2 >> 33;",
" h2 *= 0xc4ceb9fe1a85ec53;",
" h2 ^= h2 >> 33;",
" h1 += h2;",
" h2 += h1;",
"",
" j1_spin = h1&nmask; j3_spin = (h1>>48)&7;",
" j2_spin = h2&nmask; j4_spin = (h2>>48)&7;",
" K1 = h1; K2 = h2;",
"}",
"#endif",
"",
"void",
"s_hash(uchar *cp, int om)", /* uses either d_sfh (1x32bit), or d_hash (2x64bit) */
"{", /* depending on ssize ie the -w parameter */
" hasher(cp, om); /* sets K1 */",
"#ifdef BITSTATE",
" if (S_Tab == H_tab)", /* state stack in bitstate search */
" j1_spin = K1 %% omaxdepth;",
" else",
"#endif",
" if (ssize < 8*WS)",
" j1_spin = K1&mask;",
" else",
" j1_spin = K1;",
"}",
"#ifndef RANDSTOR",
"int *prerand;",
"void",
"inirand(void)",
"{ int i;",
" srand(s_rand+HASH_NR);", /* inirand */
" prerand = (int *) emalloc((omaxdepth+3)*sizeof(int));",
" for (i = 0; i < omaxdepth+3; i++)",
" { prerand[i] = rand();",
" }",
"}",
"int",
"pan_rand(void)",
"{ if (!prerand) inirand();",
" return prerand[depth];",
"}",
"#endif",
"",
"void",
"set_masks(void)",
"{",
" if (WS == 4 && ssize >= 32)",
" { mask = 0xffffffff;",
"#ifdef BITSTATE",
" switch (ssize) {",
" case 34: nmask = (mask>>1); break;",
" case 33: nmask = (mask>>2); break;",
" default: nmask = (mask>>3); break;",
" }",
"#else",
" nmask = mask;",
"#endif",
" } else if (WS == 8)",
" { mask = ((ONE_L<<ssize)-1); /* hash init */",
"#ifdef BITSTATE",
" nmask = mask>>3;",
"#else",
" nmask = mask;",
"#endif",
" } else if (WS != 4)",
" { fprintf(stderr, \"pan: wordsize %%ld not supported\\n\", (long int) WS);",
" exit(1);",
" } else /* WS == 4 and ssize < 32 */",
" { mask = ((ONE_L<<ssize)-1); /* hash init */",
" nmask = (mask>>3);",
" }",
"}",
"",
"#if defined(AUTO_RESIZE) && !defined(BITSTATE) && !defined(MA)",
"#if NCORE>1",
" #error cannot combine AUTO_RESIZE with NCORE>1",
"#endif",
"static long reclaim_size;",
"static char *reclaim_mem;",
"static H_el **N_tab;",
"void",
"reverse_capture(H_el *p)",
"{ if (!p) return;",
" reverse_capture(p->nxt);",
" /* last element of list moves first */",
" /* to preserve list-order */",
" j2_spin = p->m_K1;",
" if (ssize < 8*WS) /* probably always true */",
" { j2_spin &= mask;",
" }",
" p->nxt = N_tab[j2_spin];",
" N_tab[j2_spin] = p;",
"}",
"void",
"resize_hashtable(void)",
"{",
"#ifndef BFS_PAR", /* ssize and mask/nmask are not in shared mem */
" if (WS == 4 && ssize >= 27 - 1)",
"#endif",
" { return; /* cannot increase further */",
" }",
"",
" ssize += 2; /* 4x size @htable ssize */",
"",
" printf(\"pan: resizing hashtable to -w%%d.. \", ssize);",
"",
" N_tab = (H_el **) emalloc((ONE_L<<ssize)*sizeof(H_el *));",
" set_masks(); /* they changed */",
"",
" for (j1_spin = 0; j1_spin < (ONE_L << (ssize - 2)); j1_spin++)",
" { reverse_capture(H_tab[j1_spin]);",
" }",
" reclaim_mem = (char *) H_tab;",
" reclaim_size = (ONE_L << (ssize - 2));",
" H_tab = N_tab;",
"",
" printf(\" done\\n\");",
"}",
"#endif",
"#if defined(ZAPH) && defined(BITSTATE)",
"void",
"zap_hashtable(void)",
"{ cpu_printf(\"pan: resetting hashtable\\n\");",
" if (udmem)",
" { memset(SS, 0, udmem);",
" } else",
" { memset(SS, 0, ONE_L<<(ssize-3));",
" }",
"}",
"#endif",
"",
"#if NCLAIMS>1",
"int",
"find_claim(char *s)",
"{ int i, j;",
" for (i = 0; strncmp(procname[i], \":np_:\", 5) != 0; i++)",
" { if (strcmp(s, procname[i]) == 0)",
" { for (j = 0; j < NCLAIMS; j++)",
" { if (spin_c_typ[j] == i)",
" { return j;",
" } }",
" break;",
" } }",
" printf(\"pan: error: cannot find claim '%%s'\\n\", s);",
" exit(1);",
" return -1; /* unreachable */",
"}",
"#endif",
"",
"#if defined(BFS_PAR) && defined(BFS_SEP_HASH)",
"int /* to avoid having to include <math.h> and compile with -lm */",
"blog2(int n) /* n >= 1 */",
"{ int m=1, r=2;",
" if (n == 1) { return 0; }",
" if (n == 2) { return 1; }",
" while (n > r) { m++; r *= 2; }",
" return m;",
"}",
"#endif",
"",
"uint pp[33];",
"",
"uint ",
"mul(uint a, uint b, uint p)",
"{ int c = 0;",
" while (a)",
" { if (a&1)",
" { a ^= 1;",
" c ^= b;",
" }",
" a = (a>>1);",
" if (b & 0x80000000)",
" { b += b;",
" b ^= p;",
" } else",
" { b += b;",
" } }",
" return c;",
"}",
"",
"uint",
"ppow(int n, uint p)",
"{ uint t = 1; int i;",
" for (i = 0; i < 32; i++)",
" { if (n & (1<<i))",
" { t = mul(t, pp[i], p);",
" } }",
" return t;",
"}",
"",
"void",
"hashgen(void) /* courtesy Jim Reeds, 1995 */",
"{ uint x, y, p; int i, cnt;",
" int ff[5] = { 3, 5, 17, 257, 65537 };",
" int nn[5];",
"",
" srand(s_rand); /* was: srandom(s_rand) */",
" nn[0] = ff[1]*ff[2]*ff[3]*ff[4];",
" nn[1] = ff[0]*ff[2]*ff[3]*ff[4];",
" nn[2] = ff[0]*ff[1]*ff[3]*ff[4];",
" nn[3] = ff[0]*ff[1]*ff[2]*ff[4];",
" nn[4] = ff[0]*ff[1]*ff[2]*ff[3];",
" for (cnt = 0; cnt < 5000; cnt++)",
" { x = 2;",
" p = ((rand()<<13)^rand()) | 1; /* used random() before */",
" pp[0] = x;",
" for (i = 0; i < 32; i++)",
" { pp[i+1] = mul(pp[i], pp[i], p);",
" }",
" if (pp[32] == x)",
" { for (i = 0; i < 5; i++)",
" { y = ppow(nn[i], p);",
" if (y == 1)",
" { break;",
" } }",
" if (y != 1)",
" { HASH_CONST[0] = p;", /* 32 bit */
" if (verbose)",
" { printf(\"polynomial: 0x%%.8x (%%d tries)\\n\",",
" p, cnt);",
" }",
" return;", /* success */
" } } }",
" fprintf(efd, \"pan: could not find a polynomial in %%d tries\\n\", cnt);",
" fprintf(efd, \"pan: try a different seed with -RSn\\n\");",
" exit(1);",
"}",
"",
"int",
"main(int argc, char *argv[])",
"{ void to_compile(void);\n",
" efd = stderr; /* default */",
"#if defined(BFS_PAR) && defined(BFS_SEP_HASH)",
" uchar used_w = 0;",
"#endif",
" if (G_long != sizeof(long)",
" || G_int != sizeof(int))",
" { printf(\"spin: error, the version of spin \");",
" printf(\"that generated this pan.c assumed a different \");",
" printf(\"wordsize (%%d iso %%d)\\n\", G_long, (int) sizeof(long));",
" exit(1);",
" }",
"",
"#if defined(T_RAND) && (T_RAND>0)",
" s_rand = T_RAND;", /* so that -RS can override */
"#elif defined(P_RAND) && (P_RAND>0)",
" s_rand = P_RAND;",
"#endif",
"",
"#ifdef PUTPID",
" { char *ptr = strrchr(argv[0], '/');",
" if (ptr == NULL)",
" { ptr = argv[0];",
" } else",
" { ptr++;",
" }",
" progname = emalloc(strlen(ptr));",
" strcpy(progname, ptr);",
" /* printf(\"progname: %%s\\n\", progname); */",
" }",
"#endif",
"",
"#ifdef BITSTATE",
" b_store = bstore_reg; /* default */",
"#endif",
"#if NCORE>1",
" { int i, j;",
" strcpy(o_cmdline, \"\");",
" for (j = 1; j < argc; j++)",
" { strcat(o_cmdline, argv[j]);",
" strcat(o_cmdline, \" \");",
" }",
" /* printf(\"Command Line: %%s\\n\", o_cmdline); */",
" if (strlen(o_cmdline) >= sizeof(o_cmdline))",
" { Uerror(\"option list too long\");",
" } }",
"#endif",
" while (argc > 1 && argv[1][0] == '-')",
" { switch (argv[1][1]) {",
"#ifndef SAFETY",
" #ifdef NP",
" case 'a': fprintf(efd, \"warning: -a is disabled by -DNP, ignored\");",
" break;",
" #else",
" case 'a': a_cycles = 1; break;",
" #endif",
"#else",
" #if defined(BFS_PAR) && defined(L_BOUND)",
" case 'a': if (isdigit(argv[1][2]))",
" { L_bound = atoi(&argv[1][2]);",
" if (L_bound < 1 || L_bound > 255)",
" { printf(\"usage: -aN with 0<N<256\\n\");",
" exit(1);",
" } }",
" break;",
" #endif",
"#endif",
" case 'A': noasserts = 1; break;",
" case 'b': bounded = 1; break;",
"#ifdef HAS_CODE",
" #if HAS_CODE>0",
" case 'C': coltrace = 1; goto samething;",
" #endif",
"#endif",
" case 'c': upto = atoi(&argv[1][2]); break;",
" case 'D': dodot++; state_tables++; break;",
" case 'd': state_tables++; break;",
" case 'e': every_error = 1; upto = 0; Nr_Trails = 1; break;",
" case 'E': noends = 1; break;",
"#ifdef SC",
" case 'F': if (strlen(argv[1]) > 2)",
" stackfile = &argv[1][2];",
" break;",
"#endif",
"#if !defined(SAFETY) && !defined(NOFAIR)",
" case 'f': fairness = 1; break;",
"#endif",
"#ifdef HAS_CODE",
" #if HAS_CODE>0",
" case 'g': gui = 1; goto samething;",
" #endif",
"#endif",
" case 'h':",
" if (strncmp(&argv[1][1], \"hash\", strlen(\"hash\")) == 0)",
" { do_hashgen = 1;",
" break;",
" }",
" if (!argv[1][2] || !isdigit((int) argv[1][2]))",
" { usage(efd); /* exits */",
" }",
" HASH_NR = atoi(&argv[1][2])%%(sizeof(HASH_CONST)/sizeof(uint));",
" break;",
" case 'I': iterative = 2; every_error = 1; break;",
" case 'i':",
" if (strncmp(&argv[1][1], \"i_reverse\", strlen(\"i_reverse\")) == 0)",
" { reversing |= 1;",
" } else",
" { iterative = 1;",
" every_error = 1;",
" }",
" break;",
" case 'J': like_java = 1; break; /* Klaus Havelund */",
"#ifdef BITSTATE",
" case 'k': hfns = atoi(&argv[1][2]); break;",
"#endif",
"#ifdef BCS",
" case 'L':",
" sched_max = atoi(&argv[1][2]);",
" if (sched_max > 255) /* stored as one byte */",
" { fprintf(efd, \"warning: using max bound (255)\\n\");",
" sched_max = 255;",
" }",
" #ifndef NOREDUCE",
" if (sched_max == 0)",
" { fprintf(efd, \"warning: with (default) bound -L0, \");",
" fprintf(efd, \"using -DNOREDUCE performs better\\n\");",
" }",
" #endif",
" break;",
"#endif",
"#ifndef SAFETY",
"#ifdef NP",
" case 'l': a_cycles = 1; break;",
"#else",
" case 'l': fprintf(efd, \"error: -l not available (compile with -DNP)\");",
" usage(efd); break;",
"#endif",
"#endif",
"#ifdef BITSTATE",
" case 'M': udmem = atoi(&argv[1][2]); break;",
" case 'G': udmem = atoi(&argv[1][2]); udmem *= 1024; break;",
"#else",
" case 'M': case 'G':",
" fprintf(stderr, \"-M and -G affect only -DBITSTATE\\n\");",
" break;",
"#endif",
" case 'm': maxdepth = atoi(&argv[1][2]); break;",
"#ifndef NOCLAIM",
" case 'N':",
" #if NCLAIMS>1",
" if (isdigit((int)argv[1][2]))",
" { whichclaim = atoi(&argv[1][2]);",
" } else if (isalpha((int)argv[1][2]))",
" { claimname = &argv[1][2];",
" } else if (argc > 2 && argv[2][0] != '-') /* check next arg */",
" { claimname = argv[2];",
" argc--; argv++; /* skip next arg */",
" }",
" #else",
" #if NCLAIMS==1",
" fprintf(stderr, \"warning: only one claim defined, -N ignored\\n\");",
" #else",
" fprintf(stderr, \"warning: no claims defined, -N ignored\\n\");",
" #endif",
" if (!isdigit((int)argv[1][2]) && argc > 2 && argv[2][0] != '-')",
" { argc--; argv++;",
" }",
" #endif",
"#endif",
" break;\n",
" case 'n': no_rck = 1; break;",
"",
" case 'P':",
" if (!readtrail",
" && isdigit((int) argv[1][2]))", /* was argv[1][2] == '_' */
" { int x = atoi(&argv[1][2]);",
" if (x != 0 && x != 1)",
" { fprintf(efd, \"pan: bad option -P[01], ignored\\n\");",
" }",
" if (x == 0)",
" { reversing &= ~1;",
" break;",
" }",
" if (x == 1)",
" { reversing |= 1;",
" break;",
" }",
" if (verbose)",
" fprintf(efd, \"pan: reversed *active* process creation %%s\\n\",",
" reversing&1?\"on\":\"off\");",
" break;",
" } /* else */",
"#ifdef HAS_CODE",
" #if HAS_CODE>0",
" readtrail = 1; onlyproc = atoi(&argv[1][2]);",
" if (argc > 2 && argv[2][0] != '-') /* check next arg */",
" { trailfilename = argv[2];",
" argc--; argv++; /* skip next arg */",
" }",
" #else",
" fprintf(efd, \"pan: option -P not recognized, ignored\\n\");",
" #endif",
"#else",
" fprintf(efd, \"pan: option -P not recognized, ignored\\n\");",
"#endif",
" break;",
"",
" case 'p':",
" #if !defined(BFS) && !defined(BFS_PAR)",
" #ifdef PERMUTED",
" if (strncmp(&argv[1][1], \"p_normal\", strlen(\"p_normal\")) == 0)",
" { reversing &= ~2;",
" break;",
" }",
" reversing |=2;",
" if (strncmp(&argv[1][1], \"p_permute\", strlen(\"p_permute\")) == 0)",
" { p_reorder = set_permuted;",
" break;",
" }",
" if (strncmp(&argv[1][1], \"p_rotate\", strlen(\"p_rotate\")) == 0)",
" { p_reorder = set_rotated;",
" if (isdigit((int) argv[1][9]))",
" { p_rotate = atoi(&argv[1][9]);",
" } else",
" { p_rotate = 1;",
" }",
" break;",
" }",
" if (strncmp(&argv[1][1], \"p_randrot\", strlen(\"p_randrot\")) == 0)",
" { p_reorder = set_randrot;",
" break;",
" }",
" if (strncmp(&argv[1][1], \"p_reverse\", strlen(\"p_reverse\")) == 0)",
" { p_reorder = set_reversed;",
" break;",
" }",
" #else",
" if (strncmp(&argv[1][1], \"p_permute\", strlen(\"p_permute\")) == 0",
" || strncmp(&argv[1][1], \"p_rotate\", strlen(\"p_rotate\")) == 0",
" || strncmp(&argv[1][1], \"p_randrot\", strlen(\"p_randrot\")) == 0",
" || strncmp(&argv[1][1], \"p_reverse\", strlen(\"p_reverse\")) == 0)",
" { fprintf(efd, \"option %%s required compilation with -DPERMUTED\\n\",",
" argv[1]);",
" exit(1);",
" }",
" #endif",
" #endif",
"#ifdef SVDUMP",
" vprefix = atoi(&argv[1][2]);",
"#else",
" fprintf(efd, \"invalid option '%%s' -- ignored\\n\", argv[1]);",
"#endif",
" break;",
"#if NCORE==1",
" case 'Q': quota = (double) 60.0 * (double) atoi(&argv[1][2]);",
" #ifndef FREQ",
" freq /= 10.; /* for better resolution */",
" #endif",
" break;",
"#endif",
" case 'q': strict = 1; break;",
" case 'R':",
" if (argv[1][2] == 'S') /* e.g., -RS76842 */",
" { s_rand = atoi(&argv[1][3]);", /* RS */
" break;",
" }",
"#ifdef BITSTATE",
" Nrun = atoi(&argv[1][2]);",
" if (Nrun > 100)",
" { Nrun = 100;",
" } else if (Nrun < 1)",
" { Nrun = 1;",
" }",
"#else",
" usage(efd);",
" break;",
"#endif",
" case 'r':",
" if (strncmp(&argv[1][1], \"rhash\", strlen(\"rhash\")) == 0)",
" { if (s_rand == 12345) /* default seed */",
" {",
"#if defined(WIN32) || defined(WIN64)",
" s_rand = (uint) clock();",
"#else",
" struct tms dummy_tm;",
" s_rand = (uint) times(&dummy_tm);",
"#endif",
" }",
" srand(s_rand++);",
" #ifdef PERMUTED",
" do_hashgen = 1;", /* + randomize p_rotate, p_reverse, p_permute */
" switch (rand()%%5) {",
" case 0: p_reorder = set_permuted;",
" reversing |=2;",
" break;",
" case 1: p_reorder = set_reversed;",
" reversing |=2;",
" break;",
" /* fully randomize p_rotate: */",
" case 2: p_reorder = set_randrot;",
" reversing |=2;",
" break;",
" /* choose once, then keep p_rotate fixed: */",
" case 3: p_reorder = set_rotated;",
" p_rotate = rand()%%3;",
" reversing |=2;",
" break;",
" default: /* standard search */ break;",
" }",
" if (rand()%%2 == 0)",
" { t_reverse = 1;",
" }",
" break;",
" #else",
" fprintf(efd, \"option -rhash requires compilation with -DPERMUTED\\n\");",
" exit(1);",
" #endif",
" }",
"#if defined(HAS_CODE) && HAS_CODE>0",
"samething: readtrail = 1;",
" if (isdigit((int)argv[1][2]))",
" whichtrail = atoi(&argv[1][2]);",
" else if (argc > 2 && argv[2][0] != '-') /* check next arg */",
" { trailfilename = argv[2];",
" argc--; argv++; /* skip next arg */",
" }",
" break;",
" case 'S': silent = 1; goto samething;",
"#else",
" fprintf(efd, \"options -r is for models with embedded C code\\n\");",
" break;",
"#endif",
" case 'T':",
" if (isdigit((int) argv[1][2]))", /* was argv[1][2] == '_' */
" { t_reverse = atoi(&argv[1][2]);",
" if (verbose)",
" printf(\"pan: reverse transition ordering %%s\\n\",",
" t_reverse?\"on\":\"off\");",
" break;",
" }",
" TMODE = 0444;",
" break;",
" case 't':",
" if (strncmp(&argv[1][1], \"t_reverse\", strlen(\"t_reverse\")) == 0)",
" { t_reverse = 1;",
" break;",
" }", /* i.e., a trail prefix cannot be '_reverse' */
" if (argv[1][2])",
" { tprefix = &argv[1][2];",
" }",
" break;",
" case 'u':",
" #ifdef BFS_PAR",
" ncores = atoi(&argv[1][2]);",
" #endif",
" break;",
" case 'V': start_timer(); printf(\"Generated by %%s\\n\", SpinVersion);",
" to_compile(); pan_exit(2); break;",
" case 'v': verbose++; break;",
" case 'w': ssize = atoi(&argv[1][2]);",
" #if defined(BFS_PAR) && defined(BFS_SEP_HASH)",
" used_w = 1;",
" #endif",
" break;",
" case 'Y': signoff = 1; break;",
" case 'X': efd = stdout; break;",
" case 'x': exclusive = 1; break;",
" #if NCORE>1",
" /* -B ip is passthru to proxy of remote ip address: */",
" case 'B': argc--; argv++; break;",
" case 'Q': worker_pids[0] = atoi(&argv[1][2]); break;",
" /* -Un means that the nth worker should be instantiated as a proxy */",
" case 'U': proxy_pid = atoi(&argv[1][2]); break;",
" /* -W means this copy is started by a cluster-server as a remote */",
" /* this flag is passed to ./pan_proxy, which interprets it */",
" case 'W': remote_party++; break;",
" case 'Z': core_id = atoi(&argv[1][2]);",
" if (verbose)",
" { printf(\"cpu%%d: pid %%d parent %%d\\n\",",
" core_id, getpid(), worker_pids[0]);",
" }",
" break;",
" case 'z': z_handoff = atoi(&argv[1][2]); break;",
" #else",
" case 'z': break; /* ignored for single-core */",
" #endif",
" default : fprintf(efd, \"saw option -%%c\\n\",",
" argv[1][1]); usage(efd); break;",
" }",
" argc--; argv++;",
" }",
"#if defined(BFS_PAR) && defined(BFS_SEP_HASH)",
" if (used_w == 0)",
" { if (ncores == 0) /* all cores used, by default */",
" { ssize -= blog2(BFS_MAXPROCS - 1);",
" } else",
" { ssize -= blog2(ncores);",
" } }",
"#endif",
" if (do_hashgen)",
" { hashgen();", /* placed here so that -RSn can appear after -hash */
" }",
"#ifndef SAFETY",
" if (fairness && !a_cycles)",
" { fprintf(efd, \"error: -f requires the use of -a or -l\\n\");",
" usage(efd);",
" }",
" #if ACCEPT_LAB==0",
" if (a_cycles)",
" { fprintf(efd, \"warning: no accept labels are defined, \");",
" fprintf(efd, \"so option -a has no effect (ignored)\\n\");",
" a_cycles = 0;",
" }",
" #endif",
"#endif",
"",
"#ifdef BFS_PAR",
" uerror = bfs_uerror;",
" Uerror = bfs_Uerror;",
"#else",
" uerror = dfs_uerror;",
" Uerror = dfs_Uerror;",
"#endif",
" if (ssize <= 32) /* 6.2.0 */",
" { hasher = d_sfh;",
"#if !defined(BITSTATE) && defined(USE_TDH)",
" o_hash = o_hash32;",
"#endif",
" } else",
" { hasher = d_hash;",
"#if !defined(BITSTATE) && defined(USE_TDH)",
" o_hash = o_hash64;",
"#endif",
" }",
" if (iterative && TMODE != 0666)",
" { TMODE = 0666;",
" fprintf(efd, \"warning: -T ignored when -i or -I is used\\n\");",
" }",
"#if defined(WIN32) || defined(WIN64)",
" #ifndef _S_IWRITE",
" #define S_IWRITE 0000200 /* write permission, owner */",
" #endif",
" #ifndef _S_IREAD",
" #define S_IREAD 0000400 /* read permission, owner */",
" #endif",
" if (TMODE == 0666)",
" TMODE = S_IWRITE | S_IREAD;",
" else",
" TMODE = S_IREAD;",
"#endif",
"#if NCORE>1",
" store_proxy_pid = proxy_pid; /* for checks in mem_file() and someone_crashed() */",
" if (core_id != 0) { proxy_pid = 0; }",
" #ifndef SEP_STATE",
" if (core_id == 0 && a_cycles)",
" { fprintf(efd, \"hint: this search may be more efficient \");",
" fprintf(efd, \"if pan.c is compiled -DSEP_STATE\\n\");",
" }",
" #endif",
" if (z_handoff < 0)",
" { z_handoff = 20; /* conservative default - for non-liveness checks */",
" }",
"#if defined(NGQ) || defined(LWQ_FIXED)",
" LWQ_SIZE = (double) (128.*1048576.);",
"#else",
" LWQ_SIZE = (double) ( z_handoff + 2.) * (double) sizeof(SM_frame);",
/* the added margin of +2 is not really necessary */
"#endif",
" #if NCORE>2",
" if (a_cycles)",
" { fprintf(efd, \"warning: the intended nr of cores to be used in liveness mode is 2\\n\");",
" #ifndef SEP_STATE",
" fprintf(efd, \"warning: without -DSEP_STATE there is no guarantee that all liveness violations are found\\n\");",
" #endif",
" }", /* it still works though, the later cores get states from the global q */
" #endif",
" #ifdef HAS_HIDDEN",
" #error cannot use hidden variables when compiling multi-core",
" #endif",
"#endif",
"#if defined(T_RAND) && defined(ELSE_IN_GUARD)",
" #error cannot hide 'else' as guard in d_step, when using -DT_RAND",
"#endif",
"#ifdef BITSTATE",
" if (hfns <= 0)",
" { hfns = 1;",
" fprintf(efd, \"warning: using -k%%d as minimal usable value\\n\", hfns);",
" }",
"#endif",
" omaxdepth = maxdepth;",
"#ifdef BITSTATE",
" if (WS == 4 && ssize > 34)", /* 32-bit word size */
" { ssize = 34;",
" fprintf(efd, \"warning: using -w%%d as max usable value\\n\", ssize);",
"/*",
" * -w35 would not work: 35-3 = 32 but 1^31 is the largest",
" * power of 2 that can be represented in an ulong",
" */",
" }",
"#else",
" if (WS == 4 && ssize > 27)",
" { ssize = 27;",
" fprintf(efd, \"warning: using -w%%d as max usable value\\n\", ssize);",
"/*",
" * for emalloc, the lookup table size multiplies by 4 for the pointers",
" * the largest power of 2 that can be represented in a ulong is 1^31",
" * hence the largest number of lookup table slots is 31-4 = 27",
" */",
" }",

"#endif",
"#ifdef SC",
" hiwater = HHH = maxdepth-10;",
" DDD = HHH/2;",
" if (!stackfile)",
" { stackfile = (char *) emalloc(strlen(PanSource)+4+1);",
" sprintf(stackfile, \"%%s._s_\", PanSource);",
" }",
" if (iterative)",
" { fprintf(efd, \"error: cannot use -i or -I with -DSC\\n\");",
" pan_exit(1);",
" }",
"#endif",

"#if (defined(R_XPT) || defined(W_XPT)) && !defined(MA)",
" #warning -DR_XPT and -DW_XPT assume -DMA (ignored)",
"#endif",

" if (iterative && a_cycles)",
" fprintf(efd, \"warning: -i or -I work for safety properties only\\n\");",

"#ifdef BFS",
" #ifdef SC",
" #error -DBFS not compatible with -DSC",
" #endif",
" #ifdef HAS_LAST",
" #error -DBFS not compatible with _last",
" #endif",
" #ifdef HAS_STACK",
" #error cannot use c_track UnMatched with BFS",
" #endif",
" #ifdef BCS",
" #error -DBFS not compatible with -DBCS",
" #endif",
" #ifdef REACH",
" #warning -DREACH is redundant when -DBFS is used",
" #endif",
"#endif",

"#ifdef TRIX",
" #ifdef BITSTATE",
" #error cannot combine -DTRIX and -DBITSTATE",
" #endif",
" #ifdef COLLAPSE",
" #error cannot combine -DTRIX and -DCOLLAPSE",
" #endif",
" #ifdef MA",
" #error cannot combine -DTRIX and -DMA",
" #endif",
" #if defined(BFS_PAR) && defined(BFS_SEP_HEAP)",
" #error cannot combined -DBFS_SEP_HEAP with -DTRIX",
" #endif",
"#endif",

"#ifdef BFS_PAR",
" #ifdef NP",
" #error cannot combine -DBFS_PAR and -DNP",
" #undef NP",
" #endif",
"#endif",

"#ifdef NOCLAIM",
" #ifdef NP",
" #warning using -DNP overrides -DNOCLAIM",
" #undef NOCLAIM",
" #endif",
"#endif",

"#ifdef BCS",
" #ifdef P_RAND",
" #error cannot combine -DBCS and -DP_RAND",
" #endif",
" #ifdef BFS",
" #error cannot combine -DBCS and -DBFS",
" #endif",
"#endif",

"#if defined(MERGED) && defined(PEG)",
" #error to use -DPEG use: spin -o3 -a",
"#endif",
"#if defined(HC) && !defined(BFS_PAR)",
" #ifdef NOCOMP",
" #error cannot combine -DHC and -DNOCOMP",
" #endif",
" #ifdef BITSTATE",
" #error cannot combine -DHC and -DBITSTATE",
" #endif",
"#endif",
"#if defined(SAFETY) && defined(NP)",
" #error cannot combine -DNP and -DBFS or -DSAFETY",
"#endif",
"#ifdef MA",
" #ifdef BITSTATE",
" #error cannot combine -DMA and -DBITSTATE",
" #endif",
" #if MA <= 0",
" #error usage: -DMA=N with N > 0 and N < VECTORSZ",
" #endif",
"#endif",
"#ifdef COLLAPSE",
" #ifdef BITSTATE",
" #error cannot combine -DBITSTATE and -DCOLLAPSE",
" #endif",
" #ifdef NOCOMP",
" #error cannot combine -DCOLLAPSE and -DNOCOMP",
" #endif",
"#endif",
" if (maxdepth <= 0 || ssize <= 1) usage(efd);",
"#if SYNC>0 && !defined(NOREDUCE)",
" if (a_cycles && fairness)",
" { fprintf(efd, \"error: p.o. reduction not compatible with \");",
" fprintf(efd, \"fairness (-f) in models\\n\");",
" fprintf(efd, \" with rendezvous operations: \");",
" fprintf(efd, \"recompile with -DNOREDUCE\\n\");",
" pan_exit(1);",
" }",
"#endif",
"#if defined(REM_VARS) && !defined(NOREDUCE)",
" #warning p.o. reduction not compatible with remote varrefs (use -DNOREDUCE)",
"#endif",
"#if defined(NOCOMP) && !defined(BITSTATE)",
" if (a_cycles)",
" { fprintf(efd, \"error: use of -DNOCOMP voids -l and -a\\n\");",
" pan_exit(1);",
" }",
"#endif",
"#ifdef MEMLIM",
" memlim = ((double) MEMLIM) * (double) (1<<20); /* size in Mbyte */",
"#endif",
"#if SYNC>0",
" #ifdef HAS_PRIORITY",
" #error use of priorities cannot be combined with rendezvous",
" #elif HAS_ENABLED",
" #error use of enabled() cannot be combined with rendezvous",
" #endif",
"#endif",
"#ifndef NOREDUCE",
" #ifdef HAS_PRIORITY",
" #warning use of priorities requires -DNOREDUCE",
" #elif HAS_ENABLED",
" #error use of enabled() requires -DNOREDUCE",
" #endif",
" #ifdef HAS_PCVALUE",
" #error use of pcvalue() requires -DNOREDUCE",
" #endif",
" #ifdef HAS_BADELSE",
" #error use of 'else' combined with i/o stmnts requires -DNOREDUCE",
" #endif",
" #if defined(HAS_LAST) && !defined(BCS)",
" #error use of _last requires -DNOREDUCE",
" #endif",
"#endif",

"#if SYNC>0 && !defined(NOREDUCE)",
" #ifdef HAS_UNLESS",
" fprintf(efd, \"warning: use of a rendezvous stmnts in the escape\\n\");",
" fprintf(efd, \"\tof an unless clause, if present, could make p.o. reduction\\n\");",
" fprintf(efd, \"\tinvalid (use -DNOREDUCE to avoid this)\\n\");",
" #ifdef BFS",
" fprintf(efd, \"\t(this type of rv is also not compatible with -DBFS)\\n\");",
" #endif",
" #endif",
"#endif",
"#if SYNC>0 && defined(BFS)",
" if (!noends)",
" fprintf(efd, \"warning: use of rendezvous with BFS does not preserve all invalid endstates\\n\");",
"#endif",
"#if !defined(REACH) && !defined(BITSTATE)",
" if (iterative != 0 && a_cycles == 0)",
" { fprintf(efd, \"warning: -i and -I need -DREACH to work accurately\\n\");",
" }",
"#endif",
"#if defined(BITSTATE) && defined(REACH)",
" #warning -DREACH is voided by -DBITSTATE",
"#endif",
"#if defined(MA) && defined(REACH)",
" #warning -DREACH is voided by -DMA",
"#endif",
"#if defined(FULLSTACK) && defined(CNTRSTACK)",
" #error cannot combine -DFULLSTACK and -DCNTRSTACK",
"#endif",
"#if defined(VERI)",
" #if ACCEPT_LAB>0",
" #ifndef BFS",
" if (!a_cycles",
" #ifdef HAS_CODE",
" && !readtrail",
" #endif",
" #if NCORE>1",
" && core_id == 0",
" #endif",
" && !state_tables)",
" { fprintf(efd, \"warning: never claim + accept labels \");",
" fprintf(efd, \"requires -a flag to fully verify\\n\");",
" }",
" #else",
" if (verbose && !state_tables",
" #ifdef HAS_CODE",
" && !readtrail",
" #endif",
" )",
" { fprintf(efd, \"warning: verification in BFS mode \");",
" fprintf(efd, \"is restricted to safety properties\\n\");",
" }",
" #endif",
" #endif",
"#endif",
"#ifndef SAFETY",
" #if 0",
" if (!a_cycles",
" #ifdef HAS_CODE",
" && !readtrail",
" #endif",
" #if NCORE>1",
" && core_id == 0",
" #endif",
" && !state_tables)",
" { fprintf(efd, \"hint: this search is more efficient \");",
" fprintf(efd, \"if pan.c is compiled -DSAFETY\\n\");",
" }",
" #endif",
" #ifndef NOCOMP",
" if (!a_cycles)",
" { S_A = 0;",
" } else",
" { if (!fairness)",
" { S_A = 1; /* _a_t */",
" #ifndef NOFAIR",
" } else /* _a_t and _cnt[NFAIR] */",
" { S_A = (&(now._cnt[0]) - (uchar *) &now) + NFAIR - 2;",
" /* -2 because first two uchars in now are masked */",
" #endif",
" } }",
" #endif",
"#endif",
" signal(SIGINT, stopped);",
" set_masks();",
"#if defined(BFS) || defined(BFS_PAR)",
" trail = (Trail *) emalloc(6*sizeof(Trail));",
" trail += 3;",
"#else",
" trail = (Trail *) emalloc((maxdepth+3)*sizeof(Trail));",
" trail++; /* protect trpt-1 refs at depth 0 */",
"#endif",
" trpt = &trail[0]; /* precaution -- in case uerror is called early */",
"#ifdef BFS",
" ntrpt = trpt;",
"#endif",
"#ifdef SVDUMP",
" if (vprefix > 0)",
" { char nm[64];",
" sprintf(nm, \"%%s.svd\", PanSource);",
" if ((svfd = creat(nm, TMODE)) < 0)",
" { fprintf(efd, \"couldn't create %%s\\n\", nm);",
" vprefix = 0;",
" } }",
"#endif",
"#ifdef RANDSTOR",
" srand(s_rand+HASH_NR);", /* main - RANDSTOR */
"#endif",
"#if SYNC>0 && ASYNC==0",
" set_recvs();",
"#endif",
" run();",
" done = 1;",
" wrapup();",
" return 0;",
"}", /* end of main() */
"",
"void",
"usage(FILE *fd)",
"{",
" fprintf(fd, \"%%s\\n\", SpinVersion);",
" fprintf(fd, \"Valid Options are:\\n\");",
"#ifndef SAFETY",
"#ifdef NP",
" fprintf(fd, \"\t-a -> is disabled by -DNP \");",
" fprintf(fd, \"(-DNP compiles for -l only)\\n\");",
"#else",
" fprintf(fd, \"\t-a find acceptance cycles\\n\");",
"#endif",
"#else",
" fprintf(fd, \"\t-a,-l,-f -> are disabled by -DSAFETY\\n\");",
"#endif",
" fprintf(fd, \"\t-A ignore assert() violations\\n\");",
" fprintf(fd, \"\t-b consider it an error to exceed the depth-limit\\n\");",
" fprintf(fd, \"\t-cN stop at Nth error \");",
" fprintf(fd, \"(defaults to -c1)\\n\");",
" fprintf(fd, \"\t-D print state tables in dot-format and stop\\n\");",
" fprintf(fd, \"\t-d print state tables and stop\\n\");",
" fprintf(fd, \"\t-e create trails for all errors\\n\");",
" fprintf(fd, \"\t-E ignore invalid end states\\n\");",
"#ifdef SC",
" fprintf(fd, \"\t-Ffile use 'file' to store disk-stack\\n\");",
"#endif",
"#ifndef NOFAIR",
" fprintf(fd, \"\t-f add weak fairness (to -a or -l)\\n\");",
"#endif",
" fprintf(fd, \"\t-hN use different hash-seed N:0..499 (defaults to -h0)\\n\");",
" fprintf(fd, \"\t-hash generate a random hash-polynomial for -h0 (see also -rhash)\\n\");",
" fprintf(fd, \"\t using a seed set with -RSn (default %%u)\\n\", s_rand);",
" fprintf(fd, \"\t-i search for shortest path to error\\n\");",
" fprintf(fd, \"\t-I like -i, but approximate and faster\\n\");",
" fprintf(fd, \"\t-J reverse eval order of nested unlesses\\n\");",
"#ifdef BITSTATE",
" fprintf(fd, \"\t-kN set N bits per state (defaults to 3)\\n\");",
"#endif",
"#ifdef BCS",
" fprintf(fd, \"\t-LN set scheduling restriction to N (default 0)\\n\");",
"#endif",
"#ifndef SAFETY",
"#ifdef NP",
" fprintf(fd, \"\t-l find non-progress cycles\\n\");",
"#else",
" fprintf(fd, \"\t-l find non-progress cycles -> \");",
" fprintf(fd, \"disabled, requires \");",
" fprintf(fd, \"compilation with -DNP\\n\");",
"#endif",
"#endif",
"#ifdef BITSTATE",
" fprintf(fd, \"\t-MN use N Megabytes for bitstate hash array\\n\");",
" fprintf(fd, \"\t-GN use N Gigabytes for bitstate hash array\\n\");",
"#endif",
" fprintf(fd, \"\t-mN max depth N steps (default=10k)\\n\");",
"#if NCLAIMS>1",
" fprintf(fd, \"\t-N cn -- use the claim named cn\\n\");",
" fprintf(fd, \"\t-Nn -- use claim number n\\n\");",
"#endif",
" fprintf(fd, \"\t-n no listing of unreached states\\n\");",
"#ifdef PERMUTED",
" fprintf(fd, \"\t-p_permute randomize order in which processes are scheduled (see also -rhash)\\n\");",
" fprintf(fd, \"\t-p_reverse reverse order in which processes are scheduled (see also -rhash)\\n\");",
" fprintf(fd, \"\t-p_rotateN rotate by N the process scheduling order (see also -rhash)\\n\");",
"#endif",
"#ifdef SVDUMP",
" fprintf(fd, \"\t-pN create svfile (save N bytes per state)\\n\");",
"#endif",
" fprintf(fd, \"\t-QN set time-limit on execution of N minutes\\n\");",
" fprintf(fd, \"\t-q require empty chans in valid end states\\n\");",
"#ifdef HAS_CODE",
" fprintf(fd, \"\t-r read and execute trail - can add -v,-n,-PN,-g,-C\\n\");",
" fprintf(fd, \"\t-r trailfilename read and execute trail in file\\n\");",
" fprintf(fd, \"\t-rN read and execute N-th error trail\\n\");",
" fprintf(fd, \"\t-C read and execute trail - columnated output (can add -v,-n)\\n\");",
" fprintf(fd, \"\t-r -PN read and execute trail - restrict trail output to proc N\\n\");",
" fprintf(fd, \"\t-g read and execute trail + msc gui support\\n\");",
" fprintf(fd, \"\t-S silent replay: only user defined printfs show\\n\");",
"#endif",
" fprintf(fd, \"\t-RSn use randomization seed n\\n\");",
" fprintf(fd, \"\t-rhash use random hash-polynomial and randomly choose -p_rotateN, -p_permute, or p_reverse\\n\");",
"#ifdef BITSTATE",
" fprintf(fd, \"\t-Rn run n times n: [1..100] using n \");",
" fprintf(fd, \" different hash functions\\n\");",
"#endif",
" fprintf(fd, \"\t-T create trail files in read-only mode\\n\");",
" fprintf(fd, \"\t-t_reverse reverse order in which transitions are explored\\n\");",
" fprintf(fd, \"\t-tsuf replace .trail with .suf on trailfiles\\n\");",
" fprintf(fd, \"\t-V print SPIN version number\\n\");",
" fprintf(fd, \"\t-v verbose -- filenames in unreached state listing\\n\");",
" fprintf(fd, \"\t-wN hashtable of 2^N entries \");",
" fprintf(fd, \"(defaults to -w%%d)\\n\", ssize);",
" fprintf(fd, \"\t-x do not overwrite an existing trail file\\n\");",
"#if NCORE>1",
" fprintf(fd, \"\t-zN handoff states below depth N to 2nd cpu (multi_core)\\n\");",
"#endif",
"#ifdef HAS_CODE",
" fprintf(fd, \"\\n\toptions -r, -C, -PN, -g, and -S can optionally be followed by\\n\");",
" fprintf(fd, \"\ta filename argument, as in \'-r filename\', naming the trailfile\\n\");",
"#endif",
"#if NCORE>1",
" multi_usage(fd);",
"#endif",
" exit(1);",
"}",
"",
"char *",
"Malloc(ulong n)",
"{ char *tmp;",
"#ifdef MEMLIM",
" if (memcnt + (double) n > memlim)",
" { printf(\"pan: reached -DMEMLIM bound\\n\");",
" goto err;",
" }",
"#endif",
" tmp = (char *) malloc(n);",
" if (!tmp)",
" {",
"#ifdef BFS_PAR",
" Uerror(\"out of non-shared memory\");",
"#endif",
" printf(\"pan: out of memory\\n\");",
"#ifdef MEMLIM",
"err:",
" printf(\"\t%%g bytes used\\n\", memcnt);",
" printf(\"\t%%g bytes more needed\\n\", (double) n);",
" printf(\"\t%%g bytes limit\\n\", memlim);",
"#endif",
"#ifdef COLLAPSE",
" printf(\"hint: to reduce memory, recompile with\\n\");",
"#ifndef MA",
" printf(\" -DMA=%%d # better/slower compression, or\\n\", hmax);",
"#endif",
" printf(\" -DBITSTATE # supertrace, approximation\\n\");",
"#else",
"#ifndef BITSTATE",
" printf(\"hint: to reduce memory, recompile with\\n\");",
"#ifndef HC",
" printf(\" -DCOLLAPSE # good, fast compression, or\\n\");",
"#ifndef MA",
" printf(\" -DMA=%%d # better/slower compression, or\\n\", hmax);",
"#endif",
" printf(\" -DHC # hash-compaction, approximation\\n\");",
"#endif",
" printf(\" -DBITSTATE # supertrace, approximation\\n\");",
"#endif",
"#endif",
"#if NCORE>1",
" #ifdef FULL_TRAIL",
" printf(\" omit -DFULL_TRAIL or use pan -c0 to reduce memory\\n\");",
" #endif",
" #ifdef SEP_STATE",
" printf(\"hint: to reduce memory, recompile without\\n\");",
" printf(\" -DSEP_STATE # may be faster, but uses more memory\\n\");",
" #endif",
"#endif",
" wrapup();",
" }",
" memcnt += (double) n;",
" return tmp;",
"}",
"",
"#define CHUNK (100*VECTORSZ)",
"",
"char *",
"emalloc(ulong n) /* never released or reallocated */",
"{ char *tmp;",
" if (n == 0)",
" return (char *) NULL;",
" if (n&(sizeof(void *)-1)) /* for proper alignment */",
" n += sizeof(void *)-(n&(sizeof(void *)-1));",
" if ((ulong) left < n)", /* was: (left < (long)n) */
" { grow = (n < CHUNK) ? CHUNK : n;",
#if 1
" have = Malloc(grow);",
#else
" /* gcc's sbrk can give non-aligned result */",
" grow += sizeof(void *); /* allow realignment */",
" have = Malloc(grow);",
" if (((unsigned) have)&(sizeof(void *)-1))",
" { have += (long) (sizeof(void *) ",
" - (((unsigned) have)&(sizeof(void *)-1)));",
" grow -= sizeof(void *);",
" }",
#endif
" fragment += (double) left;",
" left = grow;",
" }",
" tmp = have;",
" have += (long) n;",
" left -= (long) n;",
" memset(tmp, 0, n);",
" return tmp;",
"}",

"void",
"dfs_Uerror(char *str)",
"{ /* always fatal */",
" uerror(str);",
"#if NCORE>1",
" sudden_stop(\"Uerror\");",
"#endif",
"#ifdef BFS_PAR",
" bfs_shutdown(\"Uerror\");",
"#endif",
" wrapup();",
"}\n",
"#if defined(MA) && !defined(SAFETY)",
"int",
"Unwind(void)",
"{ Trans *t; uchar ot, _m; int tt; short II;",
"#ifdef VERBOSE",
" int i;",
"#endif",
" uchar oat = now._a_t;",
" now._a_t &= ~(1|16|32);",
" memcpy((char *) &comp_now, (char *) &now, vsize);",
" now._a_t = oat;",
"Up:",
"#ifdef SC",
" trpt = getframe(depth);",
"#endif",
"#ifdef VERBOSE",
" printf(\"%%ld State: \", depth);",
"#if !defined(NOCOMP) && !defined(HC)",
" for (i = 0; i < vsize; i++) printf(\"%%d%%s,\",",
" ((char *)&now)[i], Mask[i]?\"*\":\"\");",
"#else",
" for (i = 0; i < vsize; i++)",
" printf(\"%%d,\", ((char *)&now)[i]);",
"#endif",
" printf(\"\\n\");",
"#endif",
"#ifndef NOFAIR",
" if (trpt->o_pm&128) /* fairness alg */",
" { now._cnt[now._a_t&1] = trpt->bup.oval;",
" depth--;",
"#ifdef SC",
" trpt = getframe(depth);",
"#else",
" trpt--;",
"#endif",
" goto Q999;",
" }",
"#endif",
"#ifdef HAS_LAST",
"#ifdef VERI",
" { long d; Trail *trl;",
" now._last = 0;",
" for (d = 1; d < depth; d++)",
" { trl = getframe(depth-d); /* was trl = (trpt-d); */",
" if (trl->pr != 0)",
" { now._last = trl->pr - BASE;",
" break;",
" } } }",
"#else",
" now._last = (depth<1)?0:(trpt-1)->pr;",
"#endif",
"#endif",
"#ifdef EVENT_TRACE",
" now._event = trpt->o_event;",
"#endif",
" if ((now._a_t&1) && depth <= A_depth)",
" { now._a_t &= ~(1|16|32);",
" if (fairness) now._a_t |= 2; /* ? */",
" A_depth = 0;",
" goto CameFromHere; /* checkcycles() */",
" }",
" t = trpt->o_t;",
" ot = trpt->o_ot; II = trpt->pr;",
" tt = trpt->o_tt; this = pptr(II);",
" _m = do_reverse(t, II, trpt->o_m);",
"#ifdef VERBOSE",
" printf(\"%%3ld: proc %%d \", depth, II);",
" printf(\"reverses %%d, %%d to %%d,\",",
" t->forw, tt, t->st);",
" printf(\" %%s [abit=%%d,adepth=%%ld,\", ",
" t->tp, now._a_t, A_depth);",
" printf(\"tau=%%d,%%d] <unwind>\\n\", ",
" trpt->tau, (trpt-1)->tau);",
"#endif",
" depth--;",
"#ifdef SC",
" trpt = getframe(depth);",
"#else",
" trpt--;",
"#endif",
" /* reached[ot][t->st] = 1; 3.4.13 */",
" ((P0 *)this)->_p = tt;",
"#ifndef NOFAIR",
" if ((trpt->o_pm&32))",
" {",
"#ifdef VERI",
" if (now._cnt[now._a_t&1] == 0)",
" now._cnt[now._a_t&1] = 1;",
"#endif",
" now._cnt[now._a_t&1] += 1;",
" }",
"Q999:",
" if (trpt->o_pm&8)",
" { now._a_t &= ~2;",
" now._cnt[now._a_t&1] = 0;",
" }",
" if (trpt->o_pm&16)",
" now._a_t |= 2;",
"#endif",
"CameFromHere:",
" if (memcmp((char *) &now, (char *) &comp_now, vsize) == 0)",
" return depth;",
" if (depth > 0) goto Up;",
" return 0;",
"}",
"#endif",
"static char unwinding;",
"void",
"dfs_uerror(char *str)",
"{ static char laststr[256];",
" int is_cycle;",
"",
" if (unwinding) return; /* 1.4.2 */",
" if (strncmp(str, laststr, 254))",
"#if NCORE>1",
" cpu_printf(\"pan:%%d: %%s (at depth %%ld)\\n\", errors+1, str,",
"#else",
" printf(\"pan:%%d: %%s (at depth %%ld)\\n\", errors+1, str,",
"#endif",
"#if NCORE>1",
" (nr_handoffs * z_handoff) + ",
"#endif",
" ((depthfound == -1)?depth:depthfound));",
" strncpy(laststr, str, 254);",
" errors++;",
"#ifdef HAS_CODE",
" if (readtrail) { wrap_trail(); return; }",
"#endif",
" is_cycle = (strstr(str, \" cycle\") != (char *) 0);",
" if (!is_cycle)",
" { depth++; trpt++;", /* include failed step */
" }",
" if ((every_error != 0)",
" || errors == upto)",
" {",
"#if defined(MA) && !defined(SAFETY)",
" if (is_cycle)",
" { int od = depth;",
" unwinding = 1;",
" depthfound = Unwind();",
" unwinding = 0;",
" depth = od;",
" }",
"#endif",
"#if NCORE>1",
" writing_trail = 1;",
"#endif",
"#ifdef BFS",
" if (depth > 1) trpt--;",
" nuerror();",
" if (depth > 1) trpt++;",
"#else",
" putrail();",
"#endif",
"#if defined(MA) && !defined(SAFETY)",
" if (strstr(str, \" cycle\"))",
" { if (every_error)",
" printf(\"sorry: MA writes 1 trail max\\n\");",
" wrapup(); /* no recovery from unwind */",
" }",
"#endif",
"#if NCORE>1",
" if (search_terminated != NULL)",
" { *search_terminated |= 4; /* uerror */",
" }",
" writing_trail = 0;",
"#endif",
" }",
" if (!is_cycle)",
" { depth--; trpt--; /* undo */",
" }",
"#ifndef BFS",
" if (iterative != 0 && maxdepth > 0)",
" { if (maxdepth > depth)",
" { maxdepth = (iterative == 1)?(depth+1):(depth/2);",
" }",
" warned = 1;",
" printf(\"pan: reducing search depth to %%ld\\n\",",
" maxdepth);",
" } else",
"#endif",
" if (errors >= upto && upto != 0)",
" {",
"#ifdef BFS_PAR",
" bfs_shutdown(\"uerror\"); /* no return */",
"#endif",
"#if NCORE>1",
" sudden_stop(\"uerror\");",
"#endif",
" wrapup();",
" }",
" depthfound = -1;",
"}\n",
"int",
"xrefsrc(int lno, S_F_MAP *mp, int M, int i)",
"{ Trans *T; int j, retval=1;",
" for (T = trans[M][i]; T; T = T->nxt)",
" if (T && T->tp)",
" { if (strcmp(T->tp, \".(goto)\") == 0",
" || strncmp(T->tp, \"goto :\", 6) == 0)",
" return 1; /* not reported */",
"",
" for (j = 0; j < sizeof(mp); j++)",
" if (i >= mp[j].from && i <= mp[j].upto)",
" { printf(\"\\t%%s:%%d\", mp[j].fnm, lno);",
" break;",
" }",
" if (j >= sizeof(mp)) /* fnm not found in list */",
" { printf(\"\\t%%s:%%d\", PanSource, lno); /* use default */",
" }",
" printf(\", state %%d\", i);",
" if (strcmp(T->tp, \"\") != 0)",
" { char *q;",
" q = transmognify(T->tp);",
" printf(\", \\\"%%s\\\"\", q?q:\"\");",
" } else if (stopstate[M][i])",
" printf(\", -end state-\");",
" printf(\"\\n\");",
" retval = 0; /* reported */",
" }",
" return retval;",
"}\n",
"void",
"r_ck(uchar *which, int N, int M, short *src, S_F_MAP *mp)",
"{ int i, m=0;",
"",
" if ((enum btypes) Btypes[M] == N_CLAIM",
" && claimname != NULL && strcmp(claimname, procname[M]) != 0)",
" { return;",
" }",
"",
" switch ((enum btypes) Btypes[M]) {",
" case P_PROC:",
" case A_PROC:",
" printf(\"unreached in proctype %%s\\n\", procname[M]);",
" break;",
" case I_PROC:",
" printf(\"unreached in init\\n\");",
" break;",
" case E_TRACE:",
" case N_TRACE:",
" case N_CLAIM:",
" default:",
" printf(\"unreached in claim %%s\\n\", procname[M]);",
" break;",
" }",
" for (i = 1; i < N; i++)",
" { if (which[i] == 0",
" && (mapstate[M][i] == 0",
" || which[mapstate[M][i]] == 0))",
" { m += xrefsrc((int) src[i], mp, M, i);",
" } else",
" { m++;",
" } }",
" printf(\"\t(%%d of %%d states)\\n\", N-1-m, N-1);",
"}",
"#if NCORE>1 && !defined(SEP_STATE)",
"static long rev_trail_cnt;",
"",
"#ifdef FULL_TRAIL",
"void",
"rev_trail(int fd, volatile Stack_Tree *st_tr)",
"{ long j; char snap[64];",
"",
" if (!st_tr)",
" { return;",
" }",
" rev_trail(fd, st_tr->prv);",
"#ifdef VERBOSE",
" printf(\"%%d (%%d) LRT [%%d,%%d] -- %%9u (root %%9u)\\n\",",
" depth, rev_trail_cnt, st_tr->pr, st_tr->t_id, st_tr, stack_last[core_id]);",
"#endif",
" if (st_tr->pr != 255)", /* still needed? */
" { sprintf(snap, \"%%ld:%%d:%%d\\n\", ",
" rev_trail_cnt++, st_tr->pr, st_tr->t_id);",
" j = strlen(snap);",
" if (write(fd, snap, j) != j)",
" { printf(\"pan: error writing trailfile\\n\");",
" close(fd);",
" wrapup();",
" return;",
" }",
" } else /* handoff point */",
" { if (a_cycles)",
" { (void) write(fd, \"-1:-1:-1\\n\", 9);",
" } }",
"}",
"#endif", /* FULL_TRAIL */
"#endif", /* NCORE>1 */
"",
"void",
"putrail(void)",
"{ int fd;",
"#if defined VERI || defined(MERGED)",
" char snap[64];",
"#endif",
"#if NCORE==1 || defined(SEP_STATE) || !defined(FULL_TRAIL)",
" long i, j;",
" Trail *trl;",
"#endif",
" fd = make_trail();",
" if (fd < 0) return;",
"#ifdef VERI",
" sprintf(snap, \"-2:%%d:-2\\n\", (uchar) ((P0 *)pptr(0))->_t);",
" if (write(fd, snap, strlen(snap)) < 0) return;",
"#endif",
"#ifdef MERGED",
" sprintf(snap, \"-4:-4:-4\\n\");",
" if (write(fd, snap, strlen(snap)) < 0) return;",
"#endif",
"#ifdef PERMUTED",
" sprintf(snap, \"-5:%%d:%%d\\n\", t_reverse, reversing&2);",
" if (write(fd, snap, strlen(snap)) < 0) return;",
"",
" sprintf(snap, \"-6:%%d:%%d\\n\", p_reorder==set_permuted, p_reorder==set_reversed);",
" if (write(fd, snap, strlen(snap)) < 0) return;",
"",
" sprintf(snap, \"-7:%%d:%%d\\n\", p_reorder==set_rotated, p_rotate);",
" if (write(fd, snap, strlen(snap)) < 0) return;",
"",
" sprintf(snap, \"-8:%%d:%%d\\n\", p_reorder==set_randrot, --s_rand);",
" if (write(fd, snap, strlen(snap)) < 0) return;",
"#endif",
"#if NCORE>1 && !defined(SEP_STATE) && defined(FULL_TRAIL)",
" rev_trail_cnt = 1;",
" enter_critical(GLOBAL_LOCK);",
" rev_trail(fd, stack_last[core_id]);",
" leave_critical(GLOBAL_LOCK);",
"#else",
" i = 1; /* trail starts at position 1 */",
" #if NCORE>1 && defined(SEP_STATE)",
" if (cur_Root.m_vsize > 0) { i++; depth++; }",
" #endif",
" for ( ; i <= depth; i++)",
" { if (i == depthfound+1)",
" { if (write(fd, \"-1:-1:-1\\n\", 9) != 9)",
" { goto notgood;",
" } }",
" trl = getframe(i);",
" if (!trl->o_t) continue;",
" if (trl->o_pm&128) continue;",
" sprintf(snap, \"%%ld:%%d:%%d\\n\", ",
" i, trl->pr, trl->o_t->t_id);",
" j = strlen(snap);",
" if (write(fd, snap, j) != j)",
" {",
"notgood: printf(\"pan: error writing trailfile\\n\");",
" close(fd);",
" wrapup();",
" } }",
"#endif",
" close(fd);",
"#if NCORE>1",
" cpu_printf(\"pan: wrote trailfile\\n\");",
"#endif",
"}\n",
"void",
"sv_save(void) /* push state vector onto save stack */",
"{ if (!svtack->nxt)",
" { svtack->nxt = (Svtack *) emalloc(sizeof(Svtack));",
" svtack->nxt->body = emalloc(vsize*sizeof(char));",
" svtack->nxt->lst = svtack;",
" svtack->nxt->m_delta = vsize;",
" svmax++;",
" } else if (vsize > svtack->nxt->m_delta)",
" { svtack->nxt->body = emalloc(vsize*sizeof(char));",
" svtack->nxt->lst = svtack;",
" svtack->nxt->m_delta = vsize;",
" svmax++;",
" }",
" svtack = svtack->nxt;",
"#if SYNC",
" svtack->o_boq = boq;",
"#endif",
"#ifdef TRIX",
" sv_populate();",
"#endif",
" svtack->o_delta = vsize; /* don't compress */",
" memcpy((char *)(svtack->body), (char *) &now, vsize);",
"#if defined(C_States) && defined(HAS_STACK) && (HAS_TRACK==1)",
" c_stack((uchar *) &(svtack->c_stack[0]));",
"#endif",
"#ifdef DEBUG",
" cpu_printf(\"%%d: sv_save\\n\", depth);",
"#endif",
"}\n",
"void",
"sv_restor(void) /* pop state vector from save stack */",
"{",
" memcpy((char *)&now, svtack->body, svtack->o_delta);",
"#if SYNC",
" boq = svtack->o_boq;",
"#endif",
"#ifdef TRIX",
" re_populate();",
"#endif",
"#if defined(C_States) && (HAS_TRACK==1)",
"#ifdef HAS_STACK",
" c_unstack((uchar *) &(svtack->c_stack[0]));",
"#endif",
" c_revert((uchar *) &(now.c_state[0]));",
"#endif",

" if (vsize != svtack->o_delta)",
" Uerror(\"sv_restor\");",
" if (!svtack->lst)",
" Uerror(\"error: sv_restor\");",
" svtack = svtack->lst;",
"#ifdef DEBUG",
" cpu_printf(\" sv_restor\\n\");",
"#endif",
"}",
"",
"void",
"p_restor(int h)",
"{ int i;",
" char *z = (char *) &now;\n",
"",
"#ifdef BFS_PAR",
" bfs_prepmask(1); /* p_restor */",
"#endif",
"#ifndef TRIX",
" proc_offset[h] = stack->o_offset;",
" proc_skip[h] = (uchar) stack->o_skip;",
"#else",
" char *oi;",
" #ifdef V_TRIX",
" printf(\"%%4d: p_restor %%d\\n\", depth, h);",
" #endif",
"#endif",
"#ifndef XUSAFE",
" p_name[h] = stack->o_name;",
"#endif",
"#ifdef TRIX",
" vsize += sizeof(char *);",
" #ifndef BFS",
" if (processes[h] != NULL || freebodies == NULL)",
" { Uerror(\"processes error\");",
" }",
" processes[h] = freebodies;",
" freebodies = freebodies->nxt;",
" processes[h]->nxt = (TRIX_v6 *) 0;",
" processes[h]->modified = 1; /* p_restor */",
" #endif",
" processes[h]->parent_pid = stack->parent;",
" processes[h]->psize = stack->o_delta;",
" memcpy((char *)pptr(h), stack->b_ptr, stack->o_delta);",
" oi = stack->b_ptr;",
"#else",
" #if !defined(NOCOMP) && !defined(HC)",
" for (i = vsize + stack->o_skip; i > vsize; i--)",
" Mask[i-1] = 1; /* align */",
" #endif",
" vsize += stack->o_skip;",
" memcpy(z+vsize, stack->body, stack->o_delta);",
" vsize += stack->o_delta;",
" #if !defined(NOCOMP) && !defined(HC)",
" for (i = 1; i <= Air[((P0 *)pptr(h))->_t]; i++)",
" Mask[vsize - i] = 1; /* pad */",
" Mask[proc_offset[h]] = 1; /* _pid */",
" #endif",
" if (BASE > 0 && h > 0)",
" ((P0 *)pptr(h))->_pid = h-BASE;",
" else",
" ((P0 *)pptr(h))->_pid = h;",
" #ifdef BFS_PAR",
" bfs_fixmask(1); /* p_restor */",
" #endif",
"#endif",
" now._nr_pr += 1;",
"#ifndef NOVSZ",
" now._vsz = vsize;",
"#endif",
" i = stack->o_delqs;",
" if (!stack->lst)",
" Uerror(\"error: p_restor\");",
" stack = stack->lst;",
" this = pptr(h);",
" while (i-- > 0)",
" q_restor();",
"#ifdef TRIX",
" re_mark_all(1); /* p_restor - all chans move up in _ids_ */",
" now._ids_[h] = oi; /* restor the original contents */",
"#endif",
"}\n",
"void",
"q_restor(void)",
"{ int h = now._nr_qs;",
"#ifdef TRIX",
" #ifdef V_TRIX",
" printf(\"%%4d: q_restor %%d\\n\", depth, h);",
" #endif",
" vsize += sizeof(char *);",
" #ifndef BFS",
" if (channels[h] != NULL || freebodies == NULL)",
" { Uerror(\"channels error\");",
" }",
" channels[h] = freebodies;",
" freebodies = freebodies->nxt;",
" channels[h]->nxt = (TRIX_v6 *) 0;",
" channels[h]->modified = 1; /* q_restor */",
" #endif",
" channels[h]->parent_pid = stack->parent;",
" channels[h]->psize = stack->o_delta;",
" memcpy((char *)qptr(h), stack->b_ptr, stack->o_delta);",
" now._ids_[now._nr_pr + h] = stack->b_ptr;",
"#else",
" char *z = (char *) &now;",
" #ifndef NOCOMP",
" int k, k_end;",
" #endif",
" #ifdef BFS_PAR",
" bfs_prepmask(2); /* q_restor */",
" #endif",
" q_offset[h] = stack->o_offset;",
" q_skip[h] = (uchar) stack->o_skip;",
" vsize += stack->o_skip;",
" memcpy(z+vsize, stack->body, stack->o_delta);",
" vsize += stack->o_delta;",
"#endif",
"#ifndef XUSAFE",
" q_name[h] = stack->o_name;",
"#endif",
"#ifndef NOVSZ",
" now._vsz = vsize;",
"#endif",
" now._nr_qs += 1;",
"#ifndef TRIX",
" #if !defined(NOCOMP) && !defined(HC)",
" k_end = stack->o_offset;",
" k = k_end - stack->o_skip;",
" #if SYNC",
" #ifndef BFS",
" if (q_zero(now._nr_qs)) k_end += stack->o_delta;",
" #endif",
" #endif",
" for ( ; k < k_end; k++)",
" Mask[k] = 1;",
" #endif",
" #ifdef BFS_PAR",
" bfs_fixmask(2); /* q_restor */",
" #endif",
"#endif",
" if (!stack->lst)",
" Uerror(\"error: q_restor\");",
" stack = stack->lst;",
"}",

"typedef struct IntChunks {",
" int *ptr;",
" struct IntChunks *nxt;",
"} IntChunks;",
"IntChunks *filled_chunks[512];",
"IntChunks *empty_chunks[512];",

"int *",
"grab_ints(int nr)",
"{ IntChunks *z;",
" if (nr >= 512) Uerror(\"cannot happen grab_int\");",
" if (filled_chunks[nr])",
" { z = filled_chunks[nr];",
" filled_chunks[nr] = filled_chunks[nr]->nxt;",
" } else ",
" { z = (IntChunks *) emalloc(sizeof(IntChunks));",
" z->ptr = (int *) emalloc(nr * sizeof(int));",
" }",
" z->nxt = empty_chunks[nr];",
" empty_chunks[nr] = z;",
" return z->ptr;",
"}",
"void",
"ungrab_ints(int *p, int nr)",
"{ IntChunks *z;",
" if (!empty_chunks[nr]) Uerror(\"cannot happen ungrab_int\");",
" z = empty_chunks[nr];",
" empty_chunks[nr] = empty_chunks[nr]->nxt;",
" z->ptr = p;",
" z->nxt = filled_chunks[nr];",
" filled_chunks[nr] = z;",
"}",
"int",
"delproc(int sav, int h)",
"{ int d, i=0;",
"#ifndef NOCOMP",
" int o_vsize = vsize;",
"#endif",
" if (h+1 != (int) now._nr_pr)",
" { return 0;",
" }",
"#ifdef TRIX",
" #ifdef V_TRIX",
" printf(\"%%4d: delproc %%d -- parent %%d\\n\", depth, h, processes[h]->parent_pid);",
" if (now._nr_qs > 0)",
" printf(\" top channel: %%d -- parent %%d\\n\", now._nr_qs-1, channels[now._nr_qs-1]->parent_pid);",
" #endif",
" while (now._nr_qs > 0",
" && channels[now._nr_qs-1]->parent_pid == processes[h]->parent_pid)",
" { delq(sav);",
" i++;",
" }",
" d = processes[h]->psize;",
" if (sav)",
" { if (!stack->nxt)",
" { stack->nxt = (_Stack *) emalloc(sizeof(_Stack));",
" stack->nxt->lst = stack;",
" smax++;",
" }",
" stack = stack->nxt;",
" #ifndef XUSAFE",
" stack->o_name = p_name[h];",
" #endif",
" stack->parent = processes[h]->parent_pid;",
" stack->o_delta = d;",
" stack->o_delqs = i;",
" stack->b_ptr = now._ids_[h];", /* new 6.1 */
" }",
" memset((char *)pptr(h), 0, d);",
" #ifndef BFS",
" processes[h]->nxt = freebodies;",
" freebodies = processes[h];",
" processes[h] = (TRIX_v6 *) 0;",
" #endif",
" vsize -= sizeof(char *);",
" now._nr_pr -= 1;",
" re_mark_all(-1); /* delproc - all chans move down in _ids_ */",
"#else",
" while (now._nr_qs",
" && q_offset[now._nr_qs-1] > proc_offset[h])",
" { delq(sav);",
" i++;",
" }",
" d = vsize - proc_offset[h];",
" if (sav)",
" { if (!stack->nxt)",
" { stack->nxt = (_Stack *) emalloc(sizeof(_Stack));",
" stack->nxt->body = emalloc(Maxbody * sizeof(char));",
" stack->nxt->lst = stack;",
" smax++;",
" }",
" stack = stack->nxt;",
" stack->o_offset = proc_offset[h];",
" #if VECTORSZ>32000",
" stack->o_skip = (int) proc_skip[h];",
" #else",
" stack->o_skip = (short) proc_skip[h];",
" #endif",
" #ifndef XUSAFE",
" stack->o_name = p_name[h];",
" #endif",
" stack->o_delta = d;",
" stack->o_delqs = i;",
" memcpy(stack->body, (char *)pptr(h), d);",
" }",
" vsize = proc_offset[h];",
" now._nr_pr -= 1;",
" memset((char *)pptr(h), 0, d);",
" vsize -= (int) proc_skip[h];",
" #if !defined(NOCOMP) && !defined(HC)",
" #ifdef BFS_PAR",
" bfs_prepmask(3); /* delproc - no chance in proc_offset or proc_skip */",
" #endif",
" for (i = vsize; i < o_vsize; i++)",
" Mask[i] = 0; /* reset */",
" #ifdef BFS_PAR",
" bfs_fixmask(3); /* delproc */",
" #endif",
" #endif",
"#endif",
"#ifndef NOVSZ",
" now._vsz = vsize;",
"#endif",
" return 1;",
"}\n",
"void",
"delq(int sav)",
"{ int h = now._nr_qs - 1;",
"#ifdef TRIX",
" int d = channels[now._nr_qs - 1]->psize;",
"#else",
" int d = vsize - q_offset[now._nr_qs - 1];",
"#endif",
"#ifndef NOCOMP",
" int k, o_vsize = vsize;",
"#endif",
" if (sav)",
" { if (!stack->nxt)",
" { stack->nxt = (_Stack *) emalloc(sizeof(_Stack));",
"#ifndef TRIX",
" stack->nxt->body = emalloc(Maxbody * sizeof(char));",
"#endif",
" stack->nxt->lst = stack;",
" smax++;",
" }",
" stack = stack->nxt;",
"#ifdef TRIX",
" stack->parent = channels[h]->parent_pid;",
" stack->b_ptr = now._ids_[h];", /* new 6.1 */
"#else",
" stack->o_offset = q_offset[h];",
" #if VECTORSZ>32000",
" stack->o_skip = (int) q_skip[h];",
" #else",
" stack->o_skip = (short) q_skip[h];",
" #endif",
"#endif",
" #ifndef XUSAFE",
" stack->o_name = q_name[h];",
" #endif",
" stack->o_delta = d;",
"#ifndef TRIX",
" memcpy(stack->body, (char *)qptr(h), d);",
"#endif",
" }",
"#ifdef TRIX",
" vsize -= sizeof(char *);",
" #ifdef V_TRIX",
" printf(\"%%4d: delq %%d parent %%d\\n\", depth, h, channels[h]->parent_pid);",
" #endif",
"#else",
" vsize = q_offset[h];",
" vsize -= (int) q_skip[h];",
" #if !defined(NOCOMP) && !defined(HC)",
" #ifdef BFS_PAR",
" bfs_prepmask(3); /* delq - no change in q_offset or q_skip */",
" #endif",
" for (k = vsize; k < o_vsize; k++)",
" Mask[k] = 0; /* reset */",
" #ifdef BFS_PAR",
" bfs_fixmask(3); /* delq */",
" #endif",
" #endif",
"#endif",
" now._nr_qs -= 1;",
" memset((char *)qptr(h), 0, d);",
"#ifdef TRIX",
" #ifndef BFS",
" channels[h]->nxt = freebodies;",
" freebodies = channels[h];",
" channels[h] = (TRIX_v6 *) 0;",
" #endif",
"#endif",
"#ifndef NOVSZ",
" now._vsz = vsize;",
"#endif",
"}\n",
"int",
"qs_empty(void)",
"{ int i;",
" for (i = 0; i < (int) now._nr_qs; i++)",
" { if (q_sz(i) > 0)",
" return 0;",
" }",
" return 1;",
"}\n",
"int",
"endstate(void)",
"{ int i; P0 *ptr;",
" for (i = BASE; i < (int) now._nr_pr; i++)",
" { ptr = (P0 *) pptr(i);",
" if (!stopstate[ptr->_t][ptr->_p])",
" return 0;",
" }",
" if (strict) return qs_empty();",
"#if defined(EVENT_TRACE)",
" if (!stopstate[EVENT_TRACE][now._event] && !a_cycles)",
" { printf(\"pan: event_trace not completed\\n\");",
" return 0;",
" }",
"#endif",
" return 1;",
"}\n",
"#if !defined(SAFETY) && !defined(BFS)",
"void",
"checkcycles(void)",
"{ uchar o_a_t = now._a_t;",
" #ifndef NOFAIR",
" uchar o_cnt = now._cnt[1];",
" #endif",
" #ifdef FULLSTACK",
" #ifndef MA",
" H_el *sv = trpt->ostate; /* save */",
" #else",
" uchar prov = trpt->proviso; /* save */",
" #endif",
" #endif",
" #ifdef DEBUG",
" { int i; uchar *v = (uchar *) &now;",
" printf(\" set Seed state \");",
" #ifndef NOFAIR",
" if (fairness)",
" printf(\"(cnt = %%d:%%d, nrpr=%%d) \",",
" now._cnt[0], now._cnt[1], now._nr_pr);",
" #endif",
" /* for (i = 0; i < n; i++) printf(\"%%d,\", v[i]); */",
" printf(\"\\n\");",
" }",
" printf(\"%%ld: cycle check starts\\n\", depth);",
" #endif",
" now._a_t |= (1|16|32);",
" /* 1 = 2nd DFS; (16|32) to improve hashing */",
" #ifndef NOFAIR",
" now._cnt[1] = now._cnt[0];",
" #endif",
" memcpy((char *)&A_Root, (char *)&now, vsize);",
" A_depth = depthfound = depth;",

" #if NCORE>1",
" mem_put_acc();", /* handoff accept states */
" #else",
" new_state(); /* start 2nd DFS */",
" #endif",

" now._a_t = o_a_t;",
" #ifndef NOFAIR",
" now._cnt[1] = o_cnt;",
" #endif",
" A_depth = 0; depthfound = -1;",
"#ifdef DEBUG",
" printf(\"%%ld: cycle check returns\\n\", depth);",
"#endif",
"#ifdef FULLSTACK",
"#ifndef MA",
" trpt->ostate = sv; /* restore */",
"#else",
" trpt->proviso = prov;",
"#endif",
"#endif",
"}",
"#endif",
"",
"#if defined(FULLSTACK) && defined(BITSTATE)",
"H_el *Free_list = (H_el *) 0;",
"void",
"onstack_init(void) /* to store stack states in a bitstate search */",
"{ S_Tab = (H_el **) emalloc(maxdepth*sizeof(H_el *));",
"}",
"#endif",

"#if !defined(BFS_PAR)",
" #if defined(FULLSTACK) && defined(BITSTATE)",
"H_el *",
"grab_state(int n)",
"{ H_el *v, *last = 0;",
" if (H_tab == S_Tab)",
" { for (v = Free_list; v && ((int) v->tagged >= n); v=v->nxt)",
" { if ((int) v->tagged == n)",
" { if (last)",
" last->nxt = v->nxt;",
" else",
"gotcha: Free_list = v->nxt;",
" v->tagged = 0;",
" v->nxt = 0;",
" #ifdef COLLAPSE",
" v->ln = 0;",
" #endif",
" return v;",
" }",
" Fh++; last=v;",
" }",
" /* new: second try */",
" v = Free_list;", /* try to avoid emalloc */
" if (v && ((int) v->tagged >= n))",
" goto gotcha;",
" ngrabs++;",
" }",
" return (H_el *) emalloc(sizeof(H_el)+n-sizeof(unsigned));",
"}",
" #else", /* !FULLSTACK || !BITSTATE */
"#if NCORE>1",
"H_el *",
"grab_state(int n)",
"{ H_el *grab_shared(int);",
" return grab_shared(sizeof(H_el)+n-sizeof(unsigned));",
"}",
"#else", /* ! NCORE>1 */
"#ifndef AUTO_RESIZE",
" #define grab_state(n) (H_el *) \\",
" emalloc(sizeof(H_el)+n-sizeof(ulong));",
"#else", /* AUTO_RESIZE */
"H_el *",
"grab_state(int n)",
"{ H_el *p;",
" int cnt = sizeof(H_el)+n-sizeof(ulong);",
"#ifndef MA",
" if (reclaim_size >= cnt+WS)",
" { if ((cnt & (WS-1)) != 0) /* alignment */",
" { cnt += WS - (cnt & (WS-1));",
" }",
" p = (H_el *) reclaim_mem;",
" reclaim_mem += cnt;",
" reclaim_size -= cnt;",
" memset(p, 0, cnt);",
" } else",
"#endif",
" { p = (H_el *) emalloc(cnt);",
" }",
" return p;",
"}",
"#endif", /* AUTO_RESIZE */
"#endif", /* NCORE>1 */
" #endif", /* FULLSTACK && !BITSTATE */
"#else", /* BFS_PAR */
" extern volatile uchar *sh_pre_malloc(ulong);",
" extern volatile uchar *sh_malloc(ulong);",
" H_el *",
" grab_state(int n) /* bfs_par */",
" { volatile uchar *rval = NULL;",
" int m = sizeof(H_el) + n - sizeof(unsigned);",
"",
" if (n == 0) m = m/n;",
" #ifdef BFS_SEP_HASH",
" rval = emalloc((ulong) m);",
" #else",
" rval = sh_malloc((ulong) m);",
" #endif",
" memset((void *) rval, 0, (size_t) m);",
"",
" return (H_el *) rval;",
" }",
"#endif", /* BFS_PAR */

"#ifdef COLLAPSE",
"ulong",
"ordinal(char *v, long n, short tp)",
"{ H_el *tmp, *ntmp; long m;",
" H_el *olst = (H_el *) 0;",
" s_hash((uchar *)v, n);",

"#if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" e_critical(BFS_ID); /* bfs_par / collapse */",
"#endif",
"#if NCORE>1 && !defined(SEP_STATE)",
" enter_critical(CS_ID); /* uses spinlock - 1..128 */",
"#endif",
" tmp = H_tab[j1_spin];",
" if (!tmp)",
" { tmp = grab_state(n);",
" H_tab[j1_spin] = tmp;",
" } else",
" for ( ;; olst = tmp, tmp = tmp->nxt)",
" { if (n == tmp->ln)",
" { m = memcmp(((char *)&(tmp->state)), v, n);",
" if (m == 0)",
" goto done;",
" if (m < 0)",
" {",
"Insert: ntmp = grab_state(n);",
" ntmp->nxt = tmp;",
" if (!olst)",
" H_tab[j1_spin] = ntmp;",
" else",
" olst->nxt = ntmp;",
" tmp = ntmp;",
" break;",
" } else if (!tmp->nxt)",
" {",
"Append: tmp->nxt = grab_state(n);",
" tmp = tmp->nxt;",
" break;",
" }",
" continue;",
" }",
" if (n < tmp->ln)",
" goto Insert;",
" else if (!tmp->nxt)",
" goto Append;",
" }",
"#if NCORE>1 && !defined(SEP_STATE)",
" enter_critical(GLOBAL_LOCK);",
"#endif",
"#ifdef BFS_PAR",
" e_critical(BFS_ORD); /* bfs_par */",
"#endif",
" m = ++ncomps[tp];",
"#ifdef BFS_PAR",
" x_critical(BFS_ORD);",
"#endif",
"#if NCORE>1 && !defined(SEP_STATE)",
" leave_critical(GLOBAL_LOCK);",
"#endif",
"#ifdef FULLSTACK",
" tmp->tagged = m;",
"#else",
" tmp->st_id = m;",
"#endif",
"#if defined(AUTO_RESIZE) && !defined(BITSTATE)",
" tmp->m_K1 = K1;",
"#endif",
" memcpy(((char *)&(tmp->state)), v, n);",
" tmp->ln = n;",
"done:",

"#if NCORE>1 && !defined(SEP_STATE)",
" leave_critical(CS_ID);",
"#endif",
"#if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
"#endif",

"#ifdef FULLSTACK",
" return tmp->tagged;",
"#else",
" return tmp->st_id;",
"#endif",
"}",
"",
"int",
"compress(char *vin, int nin) /* collapse compression */",
"{ char *w, *v = (char *) &comp_now;",
" int i, j;",
" ulong n;",
" static char *x;",
" static uchar nbytes[513]; /* 1 + 256 + 256 */",
" static unsigned short nbytelen;",
" long col_q(int, char *);",
" long col_p(int, char *);",
"#ifndef SAFETY",
" if (a_cycles)",
" *v++ = now._a_t;",
"#ifndef NOFAIR",
" if (fairness)",
" for (i = 0; i < NFAIR; i++)",
" *v++ = now._cnt[i];",
"#endif",
"#endif",
" nbytelen = 0;",

"#ifndef JOINPROCS",
" for (i = 0; i < (int) now._nr_pr; i++)",
" { n = col_p(i, (char *) 0);",
"#ifdef NOFIX",
" nbytes[nbytelen] = 0;",
"#else",
" nbytes[nbytelen] = 1;",
" *v++ = ((P0 *) pptr(i))->_t;",
"#endif",
" *v++ = n&255;",
" if (n >= (1<<8))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>8)&255;",
" }",
" if (n >= (1<<16))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>16)&255;",
" }",
" if (n >= (1<<24))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>24)&255;",
" }",
" nbytelen++;",
" }",
"#else",
" x = scratch;",
" for (i = 0; i < (int) now._nr_pr; i++)",
" x += col_p(i, x);",
" n = ordinal(scratch, x-scratch, 2); /* procs */",
" *v++ = n&255;",
" nbytes[nbytelen] = 0;",
" if (n >= (1<<8))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>8)&255;",
" }",
" if (n >= (1<<16))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>16)&255;",
" }",
" if (n >= (1<<24))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>24)&255;",
" }",
" nbytelen++;",
"#endif",
"#ifdef SEPQS",
" for (i = 0; i < (int) now._nr_qs; i++)",
" { n = col_q(i, (char *) 0);",
" nbytes[nbytelen] = 0;",
" *v++ = n&255;",
" if (n >= (1<<8))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>8)&255;",
" }",
" if (n >= (1<<16))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>16)&255;",
" }",
" if (n >= (1<<24))",
" { nbytes[nbytelen]++;",
" *v++ = (n>>24)&255;",
" }",
" nbytelen++;",
" }",
"#endif",

"#ifdef NOVSZ",
" /* 3 = _a_t, _nr_pr, _nr_qs */",
" w = (char *) &now + 3 * sizeof(uchar);",
"#ifndef NOFAIR",
" w += NFAIR;",
"#endif",
"#else",
"#if VECTORSZ<65536",
" w = (char *) &(now._vsz) + sizeof(unsigned short);",
"#else",
" w = (char *) &(now._vsz) + sizeof(ulong);",
"#endif",
"#endif",
" x = scratch;",
" *x++ = now._nr_pr;",
" *x++ = now._nr_qs;",

" if (now._nr_qs > 0 && qptr(0) < pptr(0))",
" n = qptr(0) - (uchar *) w;",
" else",
" n = pptr(0) - (uchar *) w;",
" j = w - (char *) &now;",
"",
"#if !defined(NOCOMP) && !defined(HC)",
" for (i = 0; i < (int) n; i++, w++)",
" if (!Mask[j++]) *x++ = *w;",
"#else",
" memcpy(x, w, n); x += n;",
"#endif",
"",
"#ifndef SEPQS",
" for (i = 0; i < (int) now._nr_qs; i++)",
" x += col_q(i, x);",
"#endif",

" x--;",
" for (i = 0, j = 6; i < nbytelen; i++)",
" { if (j == 6)",
" { j = 0;",
" *(++x) = 0;",
" } else",
" j += 2;",
" *x |= (nbytes[i] << j);",
" }",
" x++;",
" for (j = 0; j < WS-1; j++)",
" *x++ = 0;",
" x -= j; j = 0;",
" n = ordinal(scratch, x-scratch, 0); /* globals */",
" *v++ = n&255;",
" if (n >= (1<< 8)) { *v++ = (n>> 8)&255; j++; }",
" if (n >= (1<<16)) { *v++ = (n>>16)&255; j++; }",
" if (n >= (1<<24)) { *v++ = (n>>24)&255; j++; }",
" *v++ = j; /* add last count as a byte */",

" for (i = 0; i < WS-1; i++)",
" *v++ = 0;",
" v -= i;",
"#if 0",
" printf(\"collapse %%d -> %%d\\n\",",
" vsize, v - (char *)&comp_now);",
"#endif",
" return v - (char *)&comp_now;",
"}",

"#else", /* !COLLAPSE */
"#if !defined(NOCOMP)",
"int",
"compress(char *vin, int n) /* default compression */",
"{",
"#ifdef HC",
" int delta = 0;",
" s_hash((uchar *)vin, n); /* sets K1 and K2 */",
"#ifndef SAFETY",
" if (S_A)",
" { delta++; /* _a_t */",
"#ifndef NOFAIR",
" if (S_A > NFAIR)",
" delta += NFAIR; /* _cnt[] */",
"#endif",
" }",
"#endif",
" memcpy((char *) &comp_now + delta, (char *) &K1, WS);",
" delta += WS;",
"#if HC>0",
" memcpy((char *) &comp_now + delta, (char *) &K2, HC);",
" delta += HC;",
"#endif",
" return delta;",
"#else",
" char *vv = vin;",
" char *v = (char *) &comp_now;",
" int i;",
" #ifndef NO_FAST_C", /* disable faster compress */
" int r = 0, unroll = n/8;", /* most sv are much longer */
" if (unroll > 0)",
" { i = 0;",
" while (r++ < unroll)",
" { /* unroll 8 times, avoid ifs */",
" /* 1 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 2 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 3 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 4 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 5 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 6 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 7 */ *v = *vv++; v += 1 - Mask[i++];",
" /* 8 */ *v = *vv++; v += 1 - Mask[i++];",
" }",
" r = n - i; /* the rest, at most 7 */",
" switch (r) {",
" case 7: *v = *vv++; v += 1 - Mask[i++];",
" case 6: *v = *vv++; v += 1 - Mask[i++];",
" case 5: *v = *vv++; v += 1 - Mask[i++];",
" case 4: *v = *vv++; v += 1 - Mask[i++];",
" case 3: *v = *vv++; v += 1 - Mask[i++];",
" case 2: *v = *vv++; v += 1 - Mask[i++];",
" case 1: *v = *vv++; v += 1 - Mask[i++];",
" case 0: break;",
" }",
" n = i = v - (char *)&comp_now; /* bytes written so far */",
" r = (n+WS-1)/WS; /* in words, rounded up */",
" r *= WS; /* total bytes to fill */",
" i = r - i; /* remaining bytes */",
" switch (i) {", /* fill word */
" case 7: *v++ = 0; /* fall thru */",
" case 6: *v++ = 0;",
" case 5: *v++ = 0;",
" case 4: *v++ = 0;",
" case 3: *v++ = 0;",
" case 2: *v++ = 0;",
" case 1: *v++ = 0;",
" case 0: break;",
" default: Uerror(\"unexpected wordsize\");",
" }",
" v -= i;",
" } else",
" #endif",
" { for (i = 0; i < n; i++, vv++)",
" if (!Mask[i]) *v++ = *vv;",
" for (i = 0; i < WS-1; i++)",
" *v++ = 0;",
" v -= i;",
" }",
"#if 0",
" printf(\"compress %%d -> %%d\\n\",",
" n, v - (char *)&comp_now);",
"#endif",
" return v - (char *)&comp_now;",
"#endif",
"}",
"#endif",
"#endif", /* COLLAPSE */
"#if defined(FULLSTACK) && defined(BITSTATE)",
"#if defined(MA)",
"#if !defined(onstack_now)",
"int onstack_now(void) {}", /* to suppress compiler errors */
"#endif",
"#if !defined(onstack_put)",
"void onstack_put(void) {}", /* for this invalid combination */
"#endif",
"#if !defined(onstack_zap)",
"void onstack_zap(void) {}", /* of directives */
"#endif",
"#else",
"void",
"onstack_zap(void)",
"{ H_el *v, *w, *last = 0;",
" H_el **tmp = H_tab;",
" char *nv; int n, m;",
" static char warned = 0;",
"#if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" uchar was_last = now._last;",
" now._last = 0;",
"#endif",
"",
" H_tab = S_Tab;",
"#ifndef NOCOMP",
" nv = (char *) &comp_now;",
" n = compress((char *)&now, vsize);",
"#else",
"#if defined(BITSTATE) && defined(LC)",
" nv = (char *) &comp_now;",
" n = compact_stack((char *)&now, vsize);",
"#else",
" nv = (char *) &now;",
" n = vsize;",
"#endif",
"#endif",
"#if !defined(HC) && !(defined(BITSTATE) && defined(LC))",
" s_hash((uchar *)nv, n);",
"#endif",
" H_tab = tmp;",
" for (v = S_Tab[j1_spin]; v; Zh++, last=v, v=v->nxt)",
" { m = memcmp(&(v->state), nv, n);",
" if (m == 0)",
" goto Found;",
" if (m < 0)",
" break;",
" }",
"/* NotFound: */",
"#ifndef ZAPH",
" /* seen this happen, likely harmless in multicore */",
" if (warned == 0)",
" { /* Uerror(\"stack out of wack - zap\"); */",
" cpu_printf(\"pan: warning, stack incomplete\\n\");",
" warned = 1;",
" }",
"#endif",
" goto done;",
"Found:",
" ZAPS++;",
" if (last)",
" last->nxt = v->nxt;",
" else",
" S_Tab[j1_spin] = v->nxt;",
" v->tagged = (unsigned) n;",
"#if !defined(NOREDUCE) && !defined(SAFETY)",
" v->proviso = 0;",
"#endif",
" v->nxt = last = (H_el *) 0;",
" for (w = Free_list; w; Fa++, last=w, w = w->nxt)",
" { if ((int) w->tagged <= n)",
" { if (last)",
" { v->nxt = w;",
" last->nxt = v;",
" } else",
" { v->nxt = Free_list;",
" Free_list = v;",
" }",
" goto done;",
" }",
" if (!w->nxt)",
" { w->nxt = v;",
" goto done;",
" } }",
" Free_list = v;",
"done:",
"#if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" now._last = was_last;",
"#endif",
" return;",
"}",
"",
"#ifndef BFS_PAR",
" void",
" onstack_put(void)",
" { H_el **tmp = H_tab;",
" #if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" uchar was_last = now._last;",
" now._last = 0;",
" #endif",
" H_tab = S_Tab;",
" if (h_store((char *)&now, vsize) != 0)",
" #if defined(BITSTATE) && defined(LC)",
" printf(\"pan: warning, double stack entry\\n\");",
" #else",
" #ifndef ZAPH",
" Uerror(\"cannot happen - unstack_put\");",
" #endif",
" #endif",
" H_tab = tmp;",
" trpt->ostate = Lstate;",
" PUT++;",
" #if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" now._last = was_last;",
" #endif",
" }",
" int",
" onstack_now(void)",
" { H_el *tmp;",
" H_el **tmp2 = H_tab;",
" char *v; int n, m = 1;\n",
" #if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" uchar was_last = now._last;",
" now._last = 0;",
" #endif",
" H_tab = S_Tab;",
" #ifdef NOCOMP",
" #if defined(BITSTATE) && defined(LC)",
" v = (char *) &comp_now;",
" n = compact_stack((char *)&now, vsize);",
" #else",
" v = (char *) &now;",
" n = vsize;",
" #endif",
" #else",
" v = (char *) &comp_now;",
" n = compress((char *)&now, vsize);",
" #endif",
" #if !defined(HC) && !(defined(BITSTATE) && defined(LC))",
" s_hash((uchar *)v, n);",
" #endif",
" H_tab = tmp2;",
" for (tmp = S_Tab[j1_spin]; tmp; Zn++, tmp = tmp->nxt)",
" { m = memcmp(((char *)&(tmp->state)),v,n);",
" if (m <= 0)",
" { Lstate = (H_el *) tmp; /* onstack_now */",
" break;",
" } }",
" PROBE++;",
" #if defined(BCS) && defined(NO_LAST) && defined(HAS_LAST)",
" now._last = was_last;",
" #endif",
" return (m == 0);",
" }",
"#endif", /* !BFS_PAR */
"#endif", /* !MA */
"#endif", /* FULLSTACK && BITSTATE */

"#ifdef BITSTATE",
"void init_SS(ulong);",
"",
"void",
"sinit(void)",
"{",
" if (udmem)",
" { udmem *= 1024L*1024L;",
" #if NCORE>1",
" if (!readtrail)",
" { init_SS((ulong) udmem);",
" } else",
" #endif",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" SS = (uchar *) sh_pre_malloc((ulong) udmem);",
" #else",
" SS = (uchar *) emalloc(udmem);",
" #endif",
" b_store = bstore_mod;",
" } else",
" {",
" #if NCORE>1",
" init_SS(ONE_L<<(ssize-3));",
" #else",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" SS = (uchar *) sh_pre_malloc((ulong)(ONE_L<<(ssize-3)));",
" #else",
" SS = (uchar *) emalloc(ONE_L<<(ssize-3));",
" #endif",
" #endif",
" }",
"}",
"#else",
" #if !defined(MA) || defined(COLLAPSE)",
" void",
" set_H_tab(void)",
" {",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" H_tab = (H_el **) sh_pre_malloc((ulong)((ONE_L<<ssize)*sizeof(H_el *)));",
" #else",
" H_tab = (H_el **) emalloc((ONE_L<<ssize)*sizeof(H_el *));",
" #endif",
" }",
" #endif",
"void",
"hinit(void)",
"{",
" #ifdef MA",
" #ifdef R_XPT",
" { void r_xpoint(void);",
" r_xpoint();",
" }",
" #else",
" dfa_init((unsigned short) (MA+a_cycles));",
" #if NCORE>1 && !defined(COLLAPSE)",
" if (!readtrail)",
" { void init_HT(ulong);",
" init_HT(0L);",
" }",
" #endif",
" #endif",
" #endif",
" #if !defined(MA) || defined(COLLAPSE)",
" #if NCORE>1 || (defined(BFS_PAR) && defined(USE_TDH) && !defined(WIN32) && !defined(WIN64))",
" if (!readtrail)",
" { void init_HT(ulong);",
" init_HT((ulong) (ONE_L<<ssize)*sizeof(H_el *));",
" #if defined(TRIX) || (defined(BFS_PAR) && defined(COLLAPSE))",
" set_H_tab(); /* need both */",
" #endif",
" } else",
" #endif",
" { set_H_tab(); /* @htable ssize */",
" }",
" #endif", /* !defined(MA) || defined(COLLAPSE) */
"}",
"#endif\n",

"#if !defined(BITSTATE) || defined(FULLSTACK)",

"#ifdef DEBUG",
"void",
"dumpstate(int wasnew, char *v, int n, int tag)",
"{ int i;",
"#ifndef SAFETY",
" if (S_A)",
" { printf(\"\tstate tags %%d (%%d::%%d): \",",
" V_A, wasnew, v[0]);",
"#ifdef FULLSTACK",
" printf(\" %%d \", tag);",
"#endif",
" printf(\"\\n\");",
" }",
"#endif",
"#ifdef SDUMP",
" printf(\"\t State: \");",
"#if !defined(NOCOMP) && !defined(HC)",
" for (i = 0; i < vsize; i++) printf(\"%%d%%s,\",",
" ((char *)&now)[i], Mask[i]?\"*\":\"\");",
"#else",
" for (i = 0; i < vsize; i++)",
" printf(\"%%d,\", ((char *)&now)[i]);",
"#endif",
" printf(\"\\n\tVector: \");",
" for (i = 0; i < n; i++)",
" printf(\"%%d,\", v[i]);",
" printf(\"\\n\");",
"#endif",
"}",
"#endif",

"#ifdef MA",
"int",
"g_store(char *vin, int nin, uchar pbit)",
"{ int n, i;",
" int ret_val = 1;",
" uchar *v;",
" static uchar Info[MA+1];",
"#ifndef NOCOMP",
" n = compress(vin, nin);",
" v = (uchar *) &comp_now;",
"#else",
" n = nin;",
" v = (uchar *) vin;",
"#endif",
" if (n >= MA)",
" { printf(\"pan: error, MA too small, recompile pan.c\");",
" printf(\" with -DMA=N with N>%%d\\n\", n);",
" Uerror(\"aborting\");",
" }",
" if (n > (int) maxgs)",
" { maxgs = (uint) n;",
" }",
" for (i = 0; i < n; i++)",
" { Info[i] = v[i];",
" }",
" for ( ; i < MA-1; i++)",
" { Info[i] = 0;",
" }",
" Info[MA-1] = pbit;",
" if (a_cycles) /* place _a_t at the end */",
" { Info[MA] = Info[0];",
" Info[0] = 0;",
" }",
"",
"#ifdef BFS_PAR",
" e_critical(BFS_STATE); /* bfs_par / g_store */",
"#endif",
"#if NCORE>1 && !defined(SEP_STATE)",
" enter_critical(GLOBAL_LOCK); /* crude, but necessary */",
" /* to make this mode work, also replace emalloc with grab_shared inside store MA routines */",
"#endif",
"",
" if (!dfa_store(Info))",
" { if (pbit == 0",
" && (now._a_t&1)",
" && depth > A_depth)",
" { Info[MA] &= ~(1|16|32); /* _a_t */",
" if (dfa_member(MA))", /* was !dfa_member(MA) */
" { Info[MA-1] = 4; /* off-stack bit */",
" nShadow++;",
" if (!dfa_member(MA-1))",
" { ret_val = 3;",
" #ifdef VERBOSE",
" printf(\"intersected 1st dfs stack\\n\");",
" #endif",
" goto done;",
" } } }",
" ret_val = 0;",
" #ifdef VERBOSE",
" printf(\"new state\\n\");",
" #endif",
" goto done;",
" }",
"#ifdef FULLSTACK",
" if (pbit == 0)",
" { Info[MA-1] = 1; /* proviso bit */",
"#ifndef BFS",
" trpt->proviso = dfa_member(MA-1);",
"#endif",
" Info[MA-1] = 4; /* off-stack bit */",
" if (dfa_member(MA-1))",
" { ret_val = 1; /* off-stack */",
" #ifdef VERBOSE",
" printf(\"old state\\n\");",
" #endif",
" } else",
" { ret_val = 2; /* on-stack */",
" #ifdef VERBOSE",
" printf(\"on-stack\\n\");",
" #endif",
" }",
" goto done;",
" }",
"#endif",
" ret_val = 1;",
"#ifdef VERBOSE",
" printf(\"old state\\n\");",
"#endif",
"done:",
"#ifdef BFS_PAR",
" x_critical(BFS_STATE);",
"#endif",
"#if NCORE>1 && !defined(SEP_STATE)",
" leave_critical(GLOBAL_LOCK);",
"#endif",
" return ret_val; /* old state */",
"}",
"#endif",

"#if defined(BITSTATE) && defined(LC)",
"int",
"compact_stack(char *vin, int n)", /* special case of HC4 */
"{ int delta = 0;",
" s_hash((uchar *)vin, n); /* sets K1 and K2 */",
"#ifndef SAFETY",
" delta++; /* room for state[0] |= 128 */",
"#endif",
" memcpy((char *) &comp_now + delta, (char *) &K1, WS);",
" delta += WS;",
" memcpy((char *) &comp_now + delta, (char *) &K2, WS);",
" delta += WS; /* use all available bits */",
" return delta;",
"}",
"#endif",

"#ifdef TRIX",
"void",
"sv_populate(void)",
"{ int i, cnt = 0;",
" TRIX_v6 **base = processes;",
" int bound = now._nr_pr; /* MAXPROC+1; */",
"#ifdef V_TRIX",
" printf(\"%%4d: sv_populate\\n\", depth);",
"#endif",
"again:",
" for (i = 0; i < bound; i++)",
" { if (base[i] != NULL)",
" { H_el *tmp;",
" int m, n; uchar *v;",
"#ifndef BFS",
" if (base[i]->modified == 0)",
" { cnt++;",
" #ifdef V_TRIX",
" printf(\"%%4d: %%s %%d not modified\\n\",",
" depth, (base == processes)?\"proc\":\"chan\", i);",
" #endif",
" continue;",
" }",
" #ifndef V_MOD",
" base[i]->modified = 0;",
" #endif",
"#endif",
"#ifdef TRIX_RIX",
" if (base == processes)",
" { ((P0 *)pptr(i))->_pid = 0;",
" }",
"#endif",
" n = base[i]->psize;",
" v = base[i]->body;",
" s_hash(v, n); /* sets j1_spin */",
" tmp = H_tab[j1_spin];",
" if (!tmp) /* new */",
" { tmp = grab_state(n);",
" H_tab[j1_spin] = tmp;",
" m = 1; /* non-zero */",
" } else",
" { H_el *ntmp, *olst = (H_el *) 0;",
" for (;; hcmp++, olst = tmp, tmp = tmp->nxt)",
" { m = memcmp(((char *)&(tmp->state)), v, n);",
" if (m == 0) /* match */",
" { break;",
" } else if (m < 0) /* insert */",
" { ntmp = grab_state(n);",
" ntmp->nxt = tmp;",
" if (!olst)",
" H_tab[j1_spin] = ntmp;",
" else",
" olst->nxt = ntmp;",
" tmp = ntmp;",
" break;",
" } else if (!tmp->nxt) /* append */",
" { tmp->nxt = grab_state(n);",
" tmp = tmp->nxt;",
" break;",
" } } }",
" if (m != 0)",
" { memcpy((char *)&(tmp->state), v, n);",
"#if defined(AUTO_RESIZE) && !defined(BITSTATE)",
" tmp->m_K1 = K1; /* set via s_hash */",
"#endif",
" if (verbose)",
" { if (base == processes)",
" { _p_count[i]++;",
" } else",
" { _c_count[i]++;",
" } } }",
" now._ids_[cnt++] = (char *)&(tmp->state);",
"#ifdef TRIX_RIX",
" if (base == processes)",
" { ((P0 *)pptr(i))->_pid = i;",
" if (BASE > 0 && i > 0)",
" { ((P0 *)pptr(i))->_pid -= BASE;",
" } }",
"#endif",
" } }",
#if 0
if a process appears or disappears: always secure a full sv_populate
(channels come and go only with a process)

only one process can disappear per step
but any nr of channels can be removed at the same time
if a process disappears, all subsequent entries
are then in the wrong place in the _ids_ list
and need to be recomputed
but we do not need to fill out with zeros
because vsize prevents them being used
#endif
" /* do the same for all channels */",
" if (base == processes)",
" { base = channels;",
" bound = now._nr_qs; /* MAXQ+1; */",
" goto again;",
" }",
"}",
"#endif\n",
"#if !defined(BFS_PAR) || (!defined(BITSTATE) && !defined(USE_TDH))",
"int",
"h_store(char *vin, int nin) /* hash table storage */",
"{ H_el *ntmp;",
" H_el *tmp, *olst = (H_el *) 0;",
" char *v; int n, m=0;",
" #ifdef HC",
" uchar rem_a;",
" #endif",
" #ifdef TRIX",
" sv_populate(); /* update proc and chan ids */",
" #endif",
" #ifdef NOCOMP", /* defined by BITSTATE */
" #if defined(BITSTATE) && defined(LC)",
" if (S_Tab == H_tab)",
" { v = (char *) &comp_now;",
" n = compact_stack(vin, nin);",
" } else",
" { v = vin; n = nin;",
" }",
" #else",
" v = vin; n = nin;",
" #endif",
" #else",
" v = (char *) &comp_now;",
" #ifdef HC",
" rem_a = now._a_t;", /* new 5.0 */
" now._a_t = 0;", /* for hashing/state matching to work right */
" #endif",
" n = compress(vin, nin);", /* with HC, this calls s_hash -- but on vin, not on v... */
" #ifdef HC",
" now._a_t = rem_a;", /* new 5.0 */
" #endif",
/* with HC4 -a, compress copies K1 and K2 into v[], leaving v[0] free for the a-bit */
"#ifndef SAFETY",
" if (S_A)",
" { v[0] = 0; /* _a_t */",
"#ifndef NOFAIR",
" if (S_A > NFAIR)",
" for (m = 0; m < NFAIR; m++)",
" v[m+1] = 0; /* _cnt[] */",
"#endif",
" m = 0;",
" }",
" #endif",
" #endif",
" #if !defined(HC) && !(defined(BITSTATE) && defined(LC))",
" s_hash((uchar *)v, n);",
" #endif",
" /* for BFS_PAR we can only get here in BITSTATE mode */",
" /* and in that case we don't use locks */",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" e_critical(BFS_ID); /* bfs_par / h_store */",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" enter_critical(CS_ID);",
" #endif",
" tmp = H_tab[j1_spin];",
" if (!tmp)",
" { tmp = grab_state(n);", /* no zero-returns with bfs_par */
" #if NCORE>1",
" if (!tmp)",
" { /* if we get here -- we've already issued a warning */",
" /* but we want to allow the normal distributed termination */",
" /* to collect the stats on all cpus in the wrapup */",
" #if !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 1; /* allow normal termination */",
" }",
" #endif",
" H_tab[j1_spin] = tmp;",
" } else",
" { for (;; hcmp++, olst = tmp, tmp = tmp->nxt)",
" { /* skip the _a_t and the _cnt bytes */",
" #ifdef COLLAPSE",
" if (tmp->ln != 0)",
" { if (!tmp->nxt) goto Append;",
" continue;",
" }",
" #endif",
" m = memcmp(((char *)&(tmp->state)) + S_A, ",
" v + S_A, n - S_A);",
" if (m == 0) {",
" #ifdef SAFETY",
"#define wasnew 0",
" #else",
" int wasnew = 0;",
" #endif",

" #if !defined(SAFETY) && !defined(NOCOMP)",
" if (S_A)",
" { if ((((char *)&(tmp->state))[0] & V_A) != V_A)",
" { wasnew = 1; nShadow++;",
" ((char *)&(tmp->state))[0] |= V_A;",
" }",
"#ifndef NOFAIR",
" if (S_A > NFAIR)",
" { /* 0 <= now._cnt[now._a_t&1] < MAXPROC */",
" uint ci, bp; /* index, bit pos */",
" ci = (now._cnt[now._a_t&1] / 8);",
" bp = (now._cnt[now._a_t&1] - 8*ci);",
" if (now._a_t&1) /* use tail-bits in _cnt */",
" { ci = (NFAIR - 1) - ci;",
" bp = 7 - bp; /* bp = 0..7 */",
" }",
" ci++; /* skip over _a_t */",
" bp = 1 << bp; /* the bit mask */",
" if ((((char *)&(tmp->state))[ci] & bp)==0)",
" { if (!wasnew)",
" { wasnew = 1;",
" nShadow++;",
" }",
" ((char *)&(tmp->state))[ci] |= bp;",
" }",
" }",
" /* else: wasnew == 0, i.e., old state */",
"#endif",
" }",
" #endif",

" #if NCORE>1",
" Lstate = (H_el *) tmp; /* h_store */",
" #endif",

"#ifdef FULLSTACK",
"#ifndef SAFETY", /* or else wasnew == 0 */
" if (wasnew)",
" { Lstate = (H_el *) tmp; /* h_store */",
" tmp->tagged |= V_A;",
" if ((now._a_t&1)",
" && (tmp->tagged&A_V)",
" && depth > A_depth)",
" {",
"intersect:",
"#ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"1st dfs-stack intersected on state %%d+\\n\",",
" (int) tmp->st_id);",
"#endif",

" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",

" return 3;",
" }",
"#ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"\tNew state %%d+\\n\", (int) tmp->st_id);",
"#endif",
"#ifdef DEBUG",
" dumpstate(1, (char *)&(tmp->state),n,tmp->tagged);",
"#endif",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 0;",
" } else",
"#endif",
" if ((S_A)?(tmp->tagged&V_A):tmp->tagged)",
" { Lstate = (H_el *) tmp; /* h_store */",
"#ifndef SAFETY",
" /* already on current dfs stack */",
" /* but may also be on 1st dfs stack */",
" if ((now._a_t&1)",
" && (tmp->tagged&A_V)",

" && depth > A_depth",
/* new (Zhang's example) */
"#ifndef NOFAIR",
" && (!fairness || now._cnt[1] <= 1)",
"#endif",
" )",

" goto intersect;",
"#endif",
"#ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"\tStack state %%d\\n\", (int) tmp->st_id);",
"#endif",
"#ifdef DEBUG",
" dumpstate(0, (char *)&(tmp->state),n,tmp->tagged);",
"#endif",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 2; /* match on stack */",
" }",
"#else",
" if (wasnew)",
" {",
"#ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"\tNew state %%d+\\n\", (int) tmp->st_id);",
"#endif",
"#ifdef DEBUG",
" dumpstate(1, (char *)&(tmp->state), n, 0);",
"#endif",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 0;",
" }",
"#endif",
"#ifdef CHECK",
"#if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
"#endif",
" printf(\"\tOld state %%d\\n\", (int) tmp->st_id);",
"#endif",
"#ifdef DEBUG",
" dumpstate(0, (char *)&(tmp->state), n, 0);",
"#endif",
"#if defined(BCS)",
" #ifdef CONSERVATIVE",
" if (tmp->ctx_low > trpt->sched_limit)",
" { tmp->ctx_low = trpt->sched_limit;",
" tmp->ctx_pid[(now._last)/8] = 1 << ((now._last)%%8); /* new */",
" #ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"\t\tRevisit with fewer context switches\\n\");",
" #endif",
" nstates--;",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 0;",
" } else if ((tmp->ctx_low == trpt->sched_limit",
" && (tmp->ctx_pid[(now._last)/8] & ( 1 << ((now._last)%%8) )) == 0 ))",
" { tmp->ctx_pid[(now._last)/8] |= 1 << ((now._last)%%8); /* add */",
" #ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"\t\tRevisit with same nr of context switches\\n\");",
" #endif",
" nstates--;",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 0;",
" }",
" #endif",
"#endif",
" #ifdef REACH",
" if (tmp->D > depth)",
" { tmp->D = depth;",
" #ifdef CHECK",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
" printf(\"\t\tReVisiting (from smaller depth)\\n\");",
" #endif",
" nstates--;",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
#if 0
a possible variation of iterative search for shortest counter-example
(pan -i and pan -I) suggested by Pierre Moro (for safety properties):
state revisits on shorter depths do not start until after
the first counter-example is found. this assumes that the max search
depth is set large enough that a first (possibly long) counter-example
can be found
if set too short, this variant can miss the counter-example, even if
it would otherwise be shorter than the depth-limit.
(p.m. unsure if this preserves the guarantee of finding the
shortest counter-example - so not enabled by default)
" if (errors > 0 && iterative)", /* Moro */
#endif
" return 0;",
" }",
" #endif",
" #if (defined(BFS) && defined(Q_PROVISO)) || NCORE>1",
" Lstate = (H_el *) tmp; /* h_store */",
" #endif",
" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1 && !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 1; /* match outside stack */",
" } else if (m < 0)",
" { /* insert state before tmp */",
" ntmp = grab_state(n);",
" #if NCORE>1",
" if (!ntmp)",
" {",
" #if !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 1; /* allow normal termination */",
" }",
" #endif",
" ntmp->nxt = tmp;",
" if (!olst)",
" H_tab[j1_spin] = ntmp;",
" else",
" olst->nxt = ntmp;",
" tmp = ntmp;",
" break;",
" } else if (!tmp->nxt)",
" { /* append after tmp */",
" #ifdef COLLAPSE",
"Append:",
" #endif",
" tmp->nxt = grab_state(n);",
" #if NCORE>1",
" if (!tmp->nxt)",
" {",
" #if !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" return 1; /* allow normal termination */",
" }",
" #endif",
" tmp = tmp->nxt;",
" break;",
" } }",
" }",
" #ifdef CHECK",
" tmp->st_id = (unsigned) nstates;",
" #if NCORE>1",
" printf(\"cpu%%d: \", core_id);",
" #endif",
"#ifdef BITSTATE",
" printf(\" Push state %%d\\n\", ((int) nstates) - 1);",
"#else",
" printf(\" New state %%d\\n\", (int) nstates);",
"#endif",
"#endif",
" #if defined(BCS)",
" tmp->ctx_low = trpt->sched_limit;",
" #ifdef CONSERVATIVE",
" tmp->ctx_pid[(now._last)/8] = 1 << ((now._last)%%8); /* new limit */",
" #endif",
" #endif",
" #if !defined(SAFETY) || defined(REACH)",
" tmp->D = depth;",
" #endif",
" #if !defined(SAFETY) && !defined(NOCOMP)",
" if (S_A)",
" { v[0] = V_A;",
"#ifndef NOFAIR",
" if (S_A > NFAIR)",
" { uint ci, bp; /* as above */",
" ci = (now._cnt[now._a_t&1] / 8);",
" bp = (now._cnt[now._a_t&1] - 8*ci);",
" if (now._a_t&1)",
" { ci = (NFAIR - 1) - ci;",
" bp = 7 - bp; /* bp = 0..7 */",
" }",
" v[1+ci] = 1 << bp;",
" }",
"#endif",
" }",
" #endif",
" #if defined(AUTO_RESIZE) && !defined(BITSTATE)",
" tmp->m_K1 = K1;",
" #endif",
" memcpy(((char *)&(tmp->state)), v, n);",
" #ifdef FULLSTACK",
" tmp->tagged = (S_A)?V_A:(depth+1);",
"#ifdef DEBUG",
" dumpstate(-1, v, n, tmp->tagged);",
"#endif",
" Lstate = (H_el *) tmp; /* end of h_store */",
" #else",
" #ifdef DEBUG",
" dumpstate(-1, v, n, 0);",
" #endif",
" #if NCORE>1",
" Lstate = (H_el *) tmp; /* end of h_store */",
" #endif",
" #endif",

" #if defined(BFS_PAR) && !defined(BFS_SEP_HASH)",
" x_critical(BFS_ID);",
" #endif",
" #if NCORE>1",
" #ifdef V_PROVISO",
" tmp->cpu_id = core_id;",
" #endif",
" #if !defined(SEP_STATE) && !defined(BITSTATE)",
" leave_critical(CS_ID);",
" #endif",
" #endif",

" return 0;",
"}", /* end of h_store */
"#endif", /* !BFS_PAR || !USE_TDH */
"",
"void",
"o_hash32(uchar *s, int len, int h) /* 32-bit, like d_sfh, but with seed */",
"{ uint32_t tmp;",
" int rem;",
"",
" rem = len & 3;",
" len >>= 2;",
"",
" for ( ; len > 0; len--)",
" { h += get16bits(s);",
" tmp = (get16bits(s+2) << 11) ^ h;",
" h = (h << 16) ^ tmp;",
" s += 2*sizeof(uint16_t);",
" h += h >> 11;",
" }",
" switch (rem) {",
" case 3: h += get16bits(s);",
" h ^= h << 16;",
" h ^= s[sizeof(uint16_t)] << 18;",
" h += h >> 11;",
" break;",
" case 2: h += get16bits(s);",
" h ^= h << 11;",
" h += h >> 17;",
" break;",
" case 1: h += *s;",
" h ^= h << 10;",
" h += h >> 1;",
" break;",
" }",
" h ^= h << 3;",
" h += h >> 5;",
" h ^= h << 4;",
" h += h >> 17;",
" h ^= h << 25;",
" h += h >> 6;",
"",
" K1 = h;",
"}",
"void",
"o_hash64(uchar *kb, int nbytes, int seed)", /* 64-bit hash */
"{ uint8_t *bp;",
" uint64_t a, b, c, n;",
" const uint64_t *k = (uint64_t *) kb;",
" n = nbytes/WS; /* nr of 8-byte chunks */",
" /* extend to multiple of words, if needed */",
" a = WS - (nbytes %% WS);",
" if (a > 0 && a < WS)",
" { n++;",
" bp = kb + nbytes;",
" switch (a) {",
" case 7: *bp++ = 0; /* fall thru */",
" case 6: *bp++ = 0; /* fall thru */",
" case 5: *bp++ = 0; /* fall thru */",
" case 4: *bp++ = 0; /* fall thru */",
" case 3: *bp++ = 0; /* fall thru */",
" case 2: *bp++ = 0; /* fall thru */",
" case 1: *bp = 0;",
" case 0: break;",
" } }",
" a = (uint64_t) seed;",
" b = HASH_CONST[HASH_NR];",
" c = 0x9e3779b97f4a7c13LL; /* arbitrary */",
" while (n >= 3)",
" { a += k[0];",
" b += k[1];",
" c += k[2];",
" mix(a,b,c);",
" n -= 3;",
" k += 3;",
" }",
" c += (((uint64_t) nbytes)<<3);",
" switch (n) {",
" case 2: b += k[1];",
" case 1: a += k[0];",
" case 0: break;",
" }",
" mix(a,b,c);",
"",
" K1 = a;",
"}",
"",
"#if defined(USE_TDH) && !defined(WIN32) && !defined(WIN64)",
#if 0
some problems with this storage mode:

0. pre-allocates full hash-table with slots equal to max statevector size
e.g. with -w26 we allocate 2^26 (64 M) slots of VECTORSZ large
which can accomodate up to 64 M states
once you get close to or exceed the max, the search aborts
with a 'hashtable full' message
in HC mode the max storage needed per state is more modest and independent
of the maximum vectorsize; which makes this mode attractive as a default

1. does not support PO reduction through the Lstate->ostate->tagged
to distinguish open from closed states - this can reduce states by 50%
could add this as another bit from the hash value
e.g., could add it in HC mode to the first hash?

2. the same state may be stored multiple times
#endif
"#ifdef HC",
" #ifndef T_HC",
" #ifdef BFS_HC",
" #define T_HC BFS_HC",
" #else",
" #define T_HC 2",
" #endif",
" #endif",
" #if T_HC<1 || T_HC>4",
" #error \"BFS_HC must be 1, 2, 3, or 4 (default is 2)\"",
" #endif",
"#endif",
"",
"#define T_ROW 6", /* related to cache line size */
"#define T_ROW_SIZE (1<<T_ROW)",
"#define T_ROW_MASK -(1<<T_ROW)",
"#define T_FREE 0",
"#define T_STAT 1 /* status bit */",
"#ifndef T_VSZ",
" #define T_VSZ VECTORSZ/4 /* compressed vectorsize */",
"#endif",
"",
"static volatile char *ohash_sd; /* state data */",
"static volatile uint32_t *ohash_hv; /* hash values */",
"static ulong ohash_max;",
"static ulong ohash_mask;",
"",
"#if defined(USE_TDH) && defined(Q_PROVISO)",
" static volatile uchar *ohash_inq; /* open/closed flag BFS_INQ */",
"#endif",
"#ifdef HC",
" static uint32_t ohash_hc[T_HC];",
" static ulong ohash_hc_sz;",
"#endif",
"",
"void",
"init_HT(ulong x) /* USE_TDH cygwin/linux */",
"{ x = x / (ulong) sizeof(H_el *); /* room for x pointers */",
" #ifdef DEBUG",
" printf(\"prealloc x %%lu v %%d x*v %%lu\\n\",",
" x, T_VSZ, (ulong) (x * (ulong)T_VSZ));",
" #endif",
"#ifndef HC",
" if (!(x * (ulong) T_VSZ > x))",
" { Uerror(\"assertion x * (ulong) T_VSZ > x fails\");",
" }",
" #ifdef BFS_SEP_HASH",
" ohash_sd = (char *) emalloc(x * (ulong) T_VSZ);",
" #else",
" ohash_sd = (volatile char *) sh_pre_malloc(x * (ulong) T_VSZ);",
" #endif",
"#else", /* assume T_HC >= 1, and normally 2 */
" ohash_hc_sz = (ulong) (T_HC * (ulong) sizeof(uint32_t));",
" if (!(x * ohash_hc_sz > x))", /* watch for overflow */
" { Uerror(\"assertion x * ohash_hc_sz > x fails\");",
" }",
" #ifdef BFS_SEP_HASH",
" ohash_sd = (char *) emalloc(x * ohash_hc_sz);",
" #else",
" ohash_sd = (volatile char *) sh_pre_malloc(x * ohash_hc_sz);",
" #endif",
"#endif",
"#ifdef BFS_SEP_HASH",
" ohash_hv = (uint32_t *) emalloc(x * (ulong) sizeof(uint32_t));",
"#else",
" ohash_hv = (volatile uint32_t *) sh_pre_malloc(x * (ulong) sizeof(uint32_t));",
"#endif",
" ohash_mask = (((ulong)1)<<ssize)-1;",
" ohash_max = (((ulong)1)<<ssize)/100;",
"#if defined(USE_TDH) && defined(Q_PROVISO)",
" #ifdef BFS_SEP_HASH",
" ohash_inq = (uchar *) emalloc(x * (ulong) sizeof(uchar));",
" #else",
" ohash_inq = (volatile uchar *) sh_pre_malloc(x * (ulong) sizeof(uchar));",
" #endif",
"#endif",
"}",
"",
"static int h_table_full;",
"#ifdef L_BOUND",
"void",
"bfs_mark_live(void)",
"{ int i;",
"",
" trpt->o_pm &= ~2;",
"#ifdef VERBOSE",
" bfs_printf(\"check to mark\\n\");",
"#endif",
" for (i = 0; i < (int) now._nr_pr; i++)",
" { P0 *ptr = (P0 *) pptr(i);",
" if (accpstate[ptr->_t][ptr->_p])",
" { trpt->o_pm |= 2;",
" now._l_bnd = L_bound;",
" now._l_sds = (uchar *) 0;",
"#ifdef VERBOSE",
" bfs_printf(\"mark state live\\n\");",
"#endif",
" break;",
" } }",
"}",
"void",
"bfs_check_live(uchar b, uchar *s)",
"{ /* assert(b>0); */",
" now._l_bnd = b-1; /* decrease bound */",
"#ifdef VERBOSE",
" bfs_printf(\"check live %%d\\n\", b);",
"#endif",
" if (b == L_bound && boq == -1)", /* never mid rv */
" { now._l_sds = (uchar *) Lstate; /* new target */",
" } else",
" { now._l_sds = s; /* restore target */",
" if (s == (uchar *) Lstate)",
" { depthfound = depth - (BASE+1)*(L_bound - now._l_bnd - 1);",
" uerror(\"accept cycle found\");",
" depthfound = -1;",
" now._l_bnd = 0;",
" now._l_sds = (uchar *) 0;",
" } }",
"#ifdef VERBOSE",
" bfs_printf(\"set l_bound to %%d -- sds %%p\\n\", b-1, (void *) now._l_sds);",
"#endif",
"}",
"#endif",
"/* closed hashing with locality - similar to ltsmin */",
"int",
"o_store(const char *vin, int nin)",
"{ int i, seed = 0;",
" ulong hash_v, ix, ex;",
" uint32_t T_BUSY, T_DONE;",
" volatile uint32_t *t_entry;",
"#ifdef HC",
" ulong vs = ohash_hc_sz;",
"#else",
" ulong vs = (ulong) T_VSZ;",
"#endif",
"#ifdef L_BOUND",
" uchar o_bnd, *o_sds;",
"#endif",
"#ifndef STOP_ON_FULL",
" if (h_table_full)",
" { goto done;",
" }",
"#endif",
"#ifdef L_BOUND",
" if (now._l_bnd == 0)",
" { bfs_mark_live();",
" }",
" #ifdef VERBOSE",
" else",
" { bfs_printf(\"non-markable state %%d\\n\", now._l_bnd);",
" }",
" #endif",
" o_bnd = now._l_bnd;",
" o_sds = now._l_sds;",
" now._l_bnd = (o_bnd)?1:0; /* mark nested phase of bounded search */",
" now._l_sds = (uchar *) 0;",
"#endif",
"#if !defined(HC) && !defined(T_NOCOMP)",
" nin = compress((char *)vin, nin);",
" vin = (char *) &comp_now;",
"#endif",
" do { o_hash((uchar *)vin, nin, seed++);",
" hash_v = K1;",
" } while (hash_v == T_FREE || hash_v == T_STAT); /* unlikely, hash_v 0 or 1 */",
"",
" T_BUSY = ((uint32_t) hash_v & ~((uint32_t) T_STAT)); /* hash with status bit 0 */",
" T_DONE = ((uint32_t) hash_v | ((uint32_t) T_STAT)); /* hash with status bit 1 */",
"#ifdef HC",
" d_hash((uchar *)vin, nin);", /* HC */
" ohash_hc[0] = (uint32_t) K1;",
" #if T_HC>1",
" ohash_hc[1] = (uint32_t) (K1>>32);", /* assumes ulong = 64 bits */
" #endif",
" #if T_HC>2",
" ohash_hc[2] = (uint32_t) K2;",
" #endif",
" #if T_HC>3",
" ohash_hc[3] = (uint32_t) (K2>>32);",
" #endif",
"#endif",
" while (seed < ohash_max)",
" { ix = hash_v & ohash_mask;",
" ex = (ix & T_ROW_MASK) + T_ROW_SIZE;",
" for (i = 0; i < T_ROW_SIZE; i++)",
" { t_entry = (uint32_t *) &ohash_hv[ix];",
" if (*t_entry == T_FREE && cas(t_entry, T_FREE, T_BUSY))",
" {",
"#ifndef HC",
" memcpy((char *) &ohash_sd[ix * vs], vin, nin);",
"#else",
" memcpy((char *) &ohash_sd[ix * vs], (char *) ohash_hc, vs);",
"#endif",
"#if defined(USE_TDH) && defined(Q_PROVISO)",
" ohash_inq[ix] = (uchar) BFS_INQ;",
" Lstate = (H_el *) &ohash_inq[ix];",
"#endif",
" *t_entry = T_DONE;",
"#ifdef VERBOSE",
" #ifdef L_BOUND",
" bfs_printf(\"New state %%p [%%p]\\n\",",
" (void *) Lstate, (void *) o_sds);",
" #else",
" bfs_printf(\"New state %%p\\n\", (void *) Lstate);",
" #endif",
"#endif",
"#ifdef L_BOUND",
" if (o_bnd) { bfs_check_live(o_bnd, o_sds); }",
"#endif",
" return 0; /* New State */",
" }",
" while (*t_entry == T_BUSY)",
" { usleep(2); /* wait */",
" }",
" if (*t_entry == T_DONE /* (first) hash matches, check data */",
"#ifndef HC",
" && memcmp((char *) &ohash_sd[ix * vs], vin, nin) == 0)",
"#else",
" && memcmp((char *) &ohash_sd[ix * vs], (char *) ohash_hc, vs) == 0)",
"#endif",
" {",
"#if defined(USE_TDH) && defined(Q_PROVISO)",
" Lstate = (H_el *) &ohash_inq[ix];",
"#endif",
"#ifdef VERBOSE",
" #ifdef L_BOUND",
" bfs_printf(\"Old state %%p [%%p]\\n\",",
" (void *) Lstate, (void *) o_sds);",
" #else",
" bfs_printf(\"Old state %%p\\n\", (void *) Lstate);",
" #endif",
"#endif",
"#ifdef L_BOUND",
" if (o_bnd) { bfs_check_live(o_bnd, o_sds); }",
"#endif",
" return 1; /* Old State */",
" }",
" hcmp++; ix++;",
" ix = (ix==ex) ? ex - T_ROW_SIZE : ix;",
" }",
" /* find a new slot: */",
" do { o_hash((uchar *)vin, nin, (int) (hash_v + seed++));",
" hash_v = K1;",
" } while (hash_v == T_FREE || hash_v == T_STAT);",
" T_BUSY = ((uint32_t) hash_v & ~((uint32_t) T_STAT));",
" T_DONE = ((uint32_t) hash_v | ((uint32_t) T_STAT));",
" }",
"#ifdef STOP_ON_FULL",
" Uerror(\"hash table full\");",
" /* no return from Uerror */",
"#else",
" if (!h_table_full)",
" { h_table_full++;",
" if (who_am_i == 0)",
" { bfs_printf(\"hash table is full\\n\");",
" } }",
"done:",
" bfs_punt++; /* counts this as a lost state */",
"#endif",
"#ifdef L_BOUND",
" now._l_bnd = 0; /* no more checking */",
" now._l_sds = (uchar *) 0;",
"#endif",
" return 1; /* technically should be 0, but we want to throttle down */",
"}",
"#endif", /* USE_TDH && !WIN32 && !WIN64 */
"#endif", /* !BITSTATE || FULLSTACK */
"#include TRANSITIONS",
0,
};