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Experiments with SAT-based collapsing.

This commit is contained in:
Alan Mishchenko 2015-09-03 21:56:29 -07:00
parent 5ca86b65ad
commit 5bcde4be2b
5 changed files with 129 additions and 8 deletions
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4
abclib.dsp
View File

@ -1819,6 +1819,10 @@ SOURCE=.\src\sat\bmc\bmcChain.c
# End Source File
# Begin Source File
SOURCE=.\src\sat\bmc\bmcClp.c
# End Source File
# Begin Source File
SOURCE=.\src\sat\bmc\bmcEco.c
# End Source File
# Begin Source File

73
src/base/abci/abc.c
View File

@ -445,6 +445,7 @@ static int Abc_CommandAbc9FFTest ( Abc_Frame_t * pAbc, int argc, cha
static int Abc_CommandAbc9Qbf ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GenQbf ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatFx ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatClp ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Inse ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Maxi ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Bmci ( Abc_Frame_t * pAbc, int argc, char ** argv );
@ -1059,6 +1060,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
Cmd_CommandAdd( pAbc, "ABC9", "&qbf", Abc_CommandAbc9Qbf, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&genqbf", Abc_CommandAbc9GenQbf, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&satfx", Abc_CommandAbc9SatFx, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&satclp", Abc_CommandAbc9SatClp, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&inse", Abc_CommandAbc9Inse, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&maxi", Abc_CommandAbc9Maxi, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&bmci", Abc_CommandAbc9Bmci, 0 );
@ -37120,6 +37122,77 @@ usage:
return 1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_CommandAbc9SatClp( Abc_Frame_t * pAbc, int argc, char ** argv )
{
extern int Bmc_CollapseOne( Gia_Man_t * p, int nCubeLim, int nBTLimit, int fVerbose );
int nCubeLim = 1000;
int nBTLimit = 1000000;
int c, fVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "LCvh" ) ) != EOF )
{
switch ( c )
{
case 'L':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
goto usage;
}
nCubeLim = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nCubeLim < 0 )
goto usage;
break;
case 'C':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
goto usage;
}
nBTLimit = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nBTLimit < 0 )
goto usage;
break;
case 'v':
fVerbose ^= 1;
break;
case 'h':
goto usage;
default:
goto usage;
}
}
if ( pAbc->pGia == NULL )
{
Abc_Print( -1, "Abc_CommandAbc9SatClp(): There is no AIG.\n" );
return 0;
}
Bmc_CollapseOne( pAbc->pGia, nCubeLim, nBTLimit, fVerbose );
return 0;
usage:
Abc_Print( -2, "usage: &satclp [-LC num] [-vh]\n" );
Abc_Print( -2, "\t performs SAT based collapsing\n" );
Abc_Print( -2, "\t-L num : the limit on the SOP size of one output [default = %d]\n", nCubeLim );
Abc_Print( -2, "\t-C num : the limit on the number of conflicts in one call [default = %d]\n", nBTLimit );
Abc_Print( -2, "\t-v : toggles printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
Abc_Print( -2, "\t-h : print the command usage\n");
return 1;
}
/**Function*************************************************************

1
src/sat/bmc/module.make
View File

@ -11,6 +11,7 @@ SRC += src/sat/bmc/bmcBCore.c \
src/sat/bmc/bmcCexMin2.c \
src/sat/bmc/bmcCexTools.c \
src/sat/bmc/bmcChain.c \
src/sat/bmc/bmcClp.c \
src/sat/bmc/bmcEco.c \
src/sat/bmc/bmcFault.c \
src/sat/bmc/bmcFx.c \

48
src/sat/bsat/satSolver.c
View File

@ -556,6 +556,8 @@ static void sat_solver_canceluntil(sat_solver* s, int level) {
s->qhead = s->qtail = bound;
veci_resize(&s->trail_lim,level);
// update decision level
s->iDeciVar = level;
}
static void sat_solver_canceluntil_rollback(sat_solver* s, int NewBound) {
@ -1156,6 +1158,7 @@ void sat_solver_delete(sat_solver* s)
veci_delete(&s->pivot_vars);
veci_delete(&s->temp_clause);
veci_delete(&s->conf_final);
veci_delete(&s->vDeciVars);
// delete arrays
if (s->reasons != 0){
@ -1577,8 +1580,8 @@ static lbool sat_solver_search(sat_solver* s, ABC_INT64_T nof_conflicts)
// double var_decay = 0.95;
// double clause_decay = 0.999;
double random_var_freq = s->fNotUseRandom ? 0.0 : 0.02;
ABC_INT64_T conflictC = 0;
int fGuided = (veci_size(&s->vDeciVars) > 0);
ABC_INT64_T conflictC = 0;
veci learnt_clause;
int i;
@ -1591,6 +1594,15 @@ static lbool sat_solver_search(sat_solver* s, ABC_INT64_T nof_conflicts)
// veci_resize(&s->model,0);
veci_new(&learnt_clause);
// update variable polarity
if ( fGuided )
{
int * pVars = veci_begin(&s->vDeciVars);
for ( i = 0; i < veci_size(&s->vDeciVars); i++ )
var_set_polar( s, pVars[i], 0 );
s->iDeciVar = 0;
}
// use activity factors in every even restart
if ( (s->nRestarts & 1) && veci_size(&s->act_vars) > 0 )
// if ( veci_size(&s->act_vars) > 0 )
@ -1639,11 +1651,14 @@ static lbool sat_solver_search(sat_solver* s, ABC_INT64_T nof_conflicts)
int next;
// Reached bound on number of conflicts:
if ((nof_conflicts >= 0 && conflictC >= nof_conflicts) || (s->nRuntimeLimit && (s->stats.conflicts & 63) == 0 && Abc_Clock() > s->nRuntimeLimit)){
s->progress_estimate = sat_solver_progress(s);
sat_solver_canceluntil(s,s->root_level);
veci_delete(&learnt_clause);
return l_Undef; }
if ( !fGuided )
{
if ((nof_conflicts >= 0 && conflictC >= nof_conflicts) || (s->nRuntimeLimit && (s->stats.conflicts & 63) == 0 && Abc_Clock() > s->nRuntimeLimit)){
s->progress_estimate = sat_solver_progress(s);
sat_solver_canceluntil(s,s->root_level);
veci_delete(&learnt_clause);
return l_Undef; }
}
// Reached bound on number of conflicts:
if ( (s->nConfLimit && s->stats.conflicts > s->nConfLimit) ||
@ -1666,7 +1681,24 @@ static lbool sat_solver_search(sat_solver* s, ABC_INT64_T nof_conflicts)
// New variable decision:
s->stats.decisions++;
next = order_select(s,(float)random_var_freq);
if ( fGuided )
{
int nVars = veci_size(&s->vDeciVars);
int * pVars = veci_begin(&s->vDeciVars);
next = var_Undef;
assert( s->iDeciVar <= nVars );
while ( s->iDeciVar < nVars )
{
int iVar = pVars[s->iDeciVar++];
if ( var_value(s, iVar) == varX )
{
next = iVar;
break;
}
}
}
else
next = order_select(s,(float)random_var_freq);
if (next == var_Undef){
// Model found:

11
src/sat/bsat/satSolver.h
View File

@ -179,6 +179,9 @@ struct sat_solver_t
// clause store
void * pStore;
int fSolved;
// decision variables
veci vDeciVars;
int iDeciVar;
// trace recording
FILE * pFile;
@ -223,6 +226,14 @@ static void sat_solver_compress(sat_solver* s)
(void) RetValue;
}
}
static void sat_solver_prepare_enum(sat_solver* s, int * pVars, int nVars )
{
int v;
assert( veci_size(&s->vDeciVars) == 0 );
veci_new(&s->vDeciVars);
for ( v = 0; v < nVars; v++ )
veci_push(&s->vDeciVars,pVars[v]);
}
static int sat_solver_final(sat_solver* s, int ** ppArray)
{