int main (int argc, char ** argv) {
int i, len, ch, close = 0, res, arg;
char buffer[80], * tok, * opt;
FILE * file;
char * cmd;
LGL * lgl;
for (i = 1; i < argc; i++) {
if (!strcmp (argv[i], "-h")) {
printf ("usage: lgluntrace [-h][-v][-e][<trace>[.gz]]\n");
exit (0);
} else if (!strcmp (argv[i], "-v")) verbose = 1;
else if (!strcmp (argv[i], "-e")) exitonabort = 1;
else if (argv[i][0] == '-')
die ("invalid command line option '%s' (try '-h')", argv[i]);
else if (name)
die ("two traces '%s' and '%s' specified (try '-h')", name, argv[i]);
else name = argv[i];
}
if(name) {
len = strlen (name);
if (len >= 3 && !strcmp (name + len - 3, ".gz")) {
cmd = malloc (len + 20);
sprintf (cmd, "gunzip -c %s", name);
file = popen (cmd, "r");
free (cmd);
if (file) close = 2;
} else {
file = fopen (name, "r");
if (file) close = 1;
}
if (!file) die ("can not read '%s'", name);
} else name = "<stdin>", file = stdin;
if (exitonabort) {
msg ("setting signal handlers since '-e' specified");
signal (SIGINT, exitonsig);
signal (SIGSEGV, exitonsig);
signal (SIGABRT, exitonsig);
signal (SIGTERM, exitonsig);
}
msg ("reading %s", name);
buffer[len = 0] = 0;
lineno = 1;
res = 0;
lgl = 0;
NEXT:
ch = getc (file);
if (ch == EOF) goto DONE;
if (ch == '\r') goto NEXT;
if (ch != '\n') {
if (len + 1 >= sizeof (buffer)) perr ("line buffer exceeded");
buffer[len++] = ch;
buffer[len] = 0;
goto NEXT;
}
msg ("line %d : %s", lineno, buffer);
if (!(tok = strtok (buffer, " "))) perr ("empty line");
else if (!strcmp (tok, "add")) lgladd (lgl, intarg ("add"));
else if (!strcmp (tok, "return")) {
arg = intarg ("return");
if (arg != res)
die ("expected return value %d but got %d", arg, res);
} else if (!strcmp (tok, "deref")) res = lglderef (lgl, intarg ("deref"));
else if (!strcmp (tok, "failed")) res = lglfailed (lgl, intarg ("failed"));
else if (!strcmp (tok, "fixed")) res = lglfixed (lgl, intarg ("fixed"));
else if (!strcmp (tok, "repr")) res = lglrepr (lgl, intarg ("repr"));
else if (noarg (tok, "incvar")) res = lglincvar (lgl);
else if (noarg (tok, "maxvar")) res = lglmaxvar (lgl);
else if (noarg (tok, "changed")) res = lglchanged (lgl);
else if (noarg (tok, "inconsistent")) res = lglinconsistent (lgl);
else if (noarg (tok, "lkhd")) res = lglookahead (lgl);
else if (noarg (tok, "fixate")) lglfixate (lgl);
else if (noarg (tok, "reduce")) lglreducecache (lgl);
else if (noarg (tok, "flush")) lglflushcache (lgl);
else if (noarg (tok, "chkclone")) lglchkclone (lgl);
else if (!strcmp (tok, "assume")) lglassume (lgl, intarg ("assume"));
else if (noarg (tok, "init")) lgl = lglinit ();
else if (noarg (tok, "sat")) res = lglsat (lgl);
else if (!strcmp (tok, "simp")) res = lglsimp (lgl, intarg ("simp"));
else if (noarg (tok, "stats")) lglstats (lgl);
else if (!strcmp (tok, "freeze")) lglfreeze (lgl, intarg ("freeze"));
else if (!strcmp (tok, "melt")) lglmelt (lgl, intarg ("melt"));
else if (!strcmp (tok, "reuse")) lglreuse (lgl, intarg ("reuse"));
else if (!strcmp (tok, "frozen")) res = lglfrozen (lgl, intarg ("frozen"));
else if (!strcmp (tok, "usable")) res = lglusable (lgl, intarg ("usable"));
else if (!strcmp (tok, "reusable"))
res = lglreusable (lgl, intarg ("reusable"));
else if (noarg (tok, "setphases")) lglsetphases (lgl);
else if (!strcmp (tok, "setphase")) lglsetphase (lgl, intarg ("setphase"));
else if (!strcmp (tok, "resetphase"))
lglresetphase (lgl, intarg ("resetphase"));
else if (!strcmp (tok, "option")) {
if (!(opt = strtok (0, " "))) perr ("option name missing");
lglsetopt (lgl, opt, intarg ("option"));
} else if (noarg (tok, "release")) lglrelease (lgl);
else perr ("invalid command '%s'", tok);
lineno++;
len = 0;
goto NEXT;
DONE:
if(close == 1) fclose (file);
if(close == 2) pclose (file);
msg ("done %s", name);
return 0;
}
static void
btor_lingeling_enable_verbosity (BtorSATMgr * smgr)
{
BtorLGL * blgl = smgr->solver;
lglsetopt (blgl->lgl, "verbose", 1);
}
static int
btor_passdown_lingeling_options (BtorSATMgr * smgr,
const char * optstr,
LGL * external_lgl)
{
char * str, * p, * next, * eq, * opt, * val;
LGL * lgl = external_lgl ? external_lgl : 0;
int len, valid, res = 1;
assert (optstr);
len = strlen (optstr);
BTOR_NEWN (smgr->mm, str, len + 1);
strcpy (str, optstr);
res = 1;
for (p = str; *p; p = next)
{
if (*p == ',')
next = p + 1;
else
{
opt = p;
while (*p != ',' && *p)
p++;
if (*p)
{
assert (*p == ',');
*p = 0;
next = p + 1;
}
else next = p;
val = eq = 0;
if (!isalpha (*opt))
valid = 0;
else
{
for (p = opt + 1; isalnum (*p); p++)
;
if (*p == '=')
{
*(eq = p++) = 0;
val = p;
if (*p == '-') p++;
if (isdigit (*p))
{
while (isdigit (*p))
p++;
valid = !*p;
}
else
valid = 0;
}
else
valid = 0;
}
if (valid)
{
if (!lgl)
{
assert (!external_lgl);
lgl = lglinit ();
}
if (lglhasopt (lgl, opt))
{
if (external_lgl && val)
{
assert (lgl == external_lgl);
btor_msg_sat (smgr, 2,
"setting Lingeling option --%s=%s", opt, val);
lglsetopt (lgl, opt, atoi (val));
}
}
else
valid = 0;
}
if (!valid) res = 0;
if (valid || external_lgl) continue;
if (eq) *eq = '=';
btor_msg_sat (smgr, 0,
"*** can not pass down to Lingeling invalid option '%s'", optstr);
}
}
BTOR_DELETEN (smgr->mm, str, len + 1);
if (lgl && !external_lgl) lglrelease (lgl);
return res;
}
static int
btor_lingeling_sat (BtorSATMgr * smgr, int limit)
{
BtorLGL * blgl = smgr->solver;
LGL * lgl = blgl->lgl, * bforked;
const int clone = 1; // TODO?
const char * str;
int res, bfres;
char name[80];
if (!smgr->inc_required)
{
lglsetopt (lgl, "clim", -1);
res = lglsat (lgl);
return res;
}
lglsetopt (lgl, "flipping", 0);
if (smgr->nofork || (0 <= limit && limit < blgl->blimit))
{
if (limit < INT_MAX) lglsetopt (lgl, "clim", limit);
res = lglsat (lgl);
}
else
{
btor_msg_sat (smgr, 1, "blimit = %d", blgl->blimit);
lglsetopt (lgl, "clim", blgl->blimit);
// if (smgr->inc_required) lglsetopt (lgl, "plain", 1);
if (!(res = lglsat (lgl)))
{
lglsetopt (lgl, "plain", 0);
blgl->blimit *= 2;
if (blgl->blimit > BTOR_LGL_MAX_BLIMIT)
blgl->blimit = BTOR_LGL_MAX_BLIMIT;
blgl->nforked++;
if (clone) {
bforked = lglclone (lgl);
lglfixate (bforked);
lglmeltall (bforked);
str = "clone";
} else bforked = lglbrutefork (lgl, 0), str = "fork";
lglsetopt (bforked, "seed", blgl->nforked);
lglsetopt (bforked, "flipping", 1);
sprintf (name, "[lgl%s%d] ", str, blgl->nforked);
lglsetprefix (bforked, name);
lglsetout (bforked, smgr->output);
if (lglgetopt (lgl, "verbose")) lglsetopt (bforked, "verbose", 1);
lglsetopt (bforked, "clim", limit);
res = lglsat (bforked);
if (smgr->verbosity > 0) lglstats (bforked);
if (clone) {
bfres = lglunclone (lgl, bforked);
lglrelease (bforked);
} else bfres = lgljoin (lgl, bforked);
assert (!res || bfres == res);
res = bfres;
}
else
{
blgl->blimit = 9*(blgl->blimit/10);
if (blgl->blimit < BTOR_LGL_MIN_BLIMIT)
blgl->blimit = BTOR_LGL_MIN_BLIMIT;
}
}
return res;
}
void
btor_process_skeleton (Btor * btor)
{
BtorPtrHashTable * ids;
BtorNodePtrStack unmark_stack;
int count, fixed;
BtorNodePtrStack work_stack;
BtorMemMgr * mm = btor->mm;
BtorHashTableIterator it;
double start, delta;
int res, lit, val;
BtorNode * exp;
LGL * lgl;
start = btor_time_stamp ();
ids = btor_new_ptr_hash_table (mm,
(BtorHashPtr) btor_hash_exp_by_id,
(BtorCmpPtr) btor_compare_exp_by_id);
lgl = lglinit ();
lglsetprefix (lgl, "[lglskel] ");
if (btor->options.verbosity.val >= 2)
{
lglsetopt (lgl, "verbose", btor->options.verbosity.val - 1);
lglbnr ("Lingeling", "[lglskel] ", stdout);
fflush (stdout);
}
else
lglsetopt (lgl, "verbose", -1);
count = 0;
BTOR_INIT_STACK (work_stack);
BTOR_INIT_STACK (unmark_stack);
btor_init_node_hash_table_iterator (&it, btor->synthesized_constraints);
btor_queue_node_hash_table_iterator (&it, btor->unsynthesized_constraints);
while (btor_has_next_node_hash_table_iterator (&it))
{
count++;
exp = btor_next_node_hash_table_iterator (&it);
assert (btor_get_exp_width (btor, exp) == 1);
process_skeleton_tseitin (btor, lgl,
&work_stack, &unmark_stack, ids, exp);
lgladd (lgl, process_skeleton_tseitin_lit (ids, exp));
lgladd (lgl, 0);
}
BTOR_RELEASE_STACK (mm, work_stack);
while (!BTOR_EMPTY_STACK (unmark_stack))
{
exp = BTOR_POP_STACK (unmark_stack);
assert (!BTOR_IS_INVERTED_NODE (exp));
assert (exp->mark);
exp->mark = 0;
}
BTOR_RELEASE_STACK (mm, unmark_stack);
BTOR_MSG (btor->msg, 1, "found %u skeleton literals in %d constraints",
ids->count, count);
res = lglsimp (lgl, 0);
if (btor->options.verbosity.val)
{
BTOR_MSG (btor->msg, 1, "skeleton preprocessing result %d", res);
lglstats (lgl);
}
fixed = 0;
if (res == 20)
{
BTOR_MSG (btor->msg, 1, "skeleton inconsistent");
btor->inconsistent = 1;
}
else
{
assert (res == 0 || res == 10);
btor_init_node_hash_table_iterator (&it, ids);
while (btor_has_next_node_hash_table_iterator (&it))
{
exp = btor_next_node_hash_table_iterator (&it);
assert (!BTOR_IS_INVERTED_NODE (exp));
lit = process_skeleton_tseitin_lit (ids, exp);
val = lglfixed (lgl, lit);
if (val)
{
if (!btor_find_in_ptr_hash_table (
btor->synthesized_constraints, exp) &&
!btor_find_in_ptr_hash_table (
btor->unsynthesized_constraints, exp))
{
if (val < 0)
exp = BTOR_INVERT_NODE (exp);
btor_assert_exp (btor, exp);
btor->stats.skeleton_constraints++;
fixed++;
}
}
else
{
assert (!btor_find_in_ptr_hash_table (
btor->synthesized_constraints, exp));
assert (!btor_find_in_ptr_hash_table (
btor->unsynthesized_constraints, exp));
}
}
}
btor_delete_ptr_hash_table (ids);
lglrelease (lgl);
delta = btor_time_stamp () - start;
btor->time.skel += delta;
BTOR_MSG (btor->msg, 1,
"skeleton preprocessing produced %d new constraints in %.1f seconds",
fixed, delta);
assert (btor_check_id_table_mark_unset_dbg (btor));
}