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Added sharing of counter-examples across multiple failed properties in 'bmc3 -a'.

This commit is contained in:
Alan Mishchenko 2013-11-04 20:25:36 -08:00
parent a0529ec5c8
commit 2076d38ea3
1 changed files with 84 additions and 43 deletions
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127
src/sat/bmc/bmcBmc3.c
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@ -1348,6 +1348,26 @@ Abc_Cex_t * Saig_ManGenerateCex( Gia_ManBmc_t * p, int f, int i )
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Saig_ManCallSolver( Gia_ManBmc_t * p, int Lit )
{
if ( Lit == 0 )
return l_False;
if ( Lit == 1 )
return l_True;
return sat_solver_solve( p->pSat, &Lit, &Lit + 1, (ABC_INT64_T)p->pPars->nConfLimit, (ABC_INT64_T)0, (ABC_INT64_T)0, (ABC_INT64_T)0 );
}
/**Function*************************************************************
Synopsis [Bounded model checking engine.]
@ -1363,7 +1383,7 @@ int Saig_ManBmcScalable( Aig_Man_t * pAig, Saig_ParBmc_t * pPars )
{
Gia_ManBmc_t * p;
Aig_Obj_t * pObj;
Abc_Cex_t * pCexNew;
Abc_Cex_t * pCexNew, * pCexNew0;
unsigned * pInfo;
int RetValue = -1, fFirst = 1, nJumpFrame = 0, fUnfinished = 0;
int nOutDigits = Abc_Base10Log( Saig_ManPoNum(pAig) );
@ -1446,6 +1466,37 @@ int Saig_ManBmcScalable( Aig_Man_t * pAig, Saig_ParBmc_t * pPars )
}
if ( (pPars->nStart && f < pPars->nStart) || (nJumpFrame && f < nJumpFrame) )
continue;
// create CNF upfront
if ( pPars->fSolveAll )
{
Saig_ManForEachPo( pAig, pObj, i )
{
if ( i >= Saig_ManPoNum(pAig) )
break;
// check for timeout
if ( pPars->nTimeOutGap && pPars->timeLastSolved && Abc_Clock() > pPars->timeLastSolved + pPars->nTimeOutGap * CLOCKS_PER_SEC )
{
Abc_Print( 1, "Reached gap timeout (%d seconds).\n", pPars->nTimeOutGap );
goto finish;
}
if ( nTimeToStop && Abc_Clock() > nTimeToStop )
{
if ( !pPars->fSilent )
Abc_Print( 1, "Reached timeout (%d seconds).\n", pPars->nTimeOut );
goto finish;
}
// skip solved outputs
if ( p->vCexes && Vec_PtrEntry(p->vCexes, i) )
continue;
// skip output whose time has run out
if ( p->pTime4Outs && p->pTime4Outs[i] == 0 )
continue;
// add constraints for this output
clk2 = Abc_Clock();
Saig_ManBmcCreateCnf( p, pObj, f );
clkOther += Abc_Clock() - clk2;
}
}
// solve SAT
clk = Abc_Clock();
Saig_ManForEachPo( pAig, pObj, i )
@ -1474,45 +1525,6 @@ int Saig_ManBmcScalable( Aig_Man_t * pAig, Saig_ParBmc_t * pPars )
clk2 = Abc_Clock();
Lit = Saig_ManBmcCreateCnf( p, pObj, f );
clkOther += Abc_Clock() - clk2;
if ( Lit == 0 )
continue;
if ( Lit == 1 )
{
RetValue = 0;
if ( !pPars->fSolveAll )
{
Abc_Cex_t * pCex = Abc_CexMakeTriv( Aig_ManRegNum(pAig), Saig_ManPiNum(pAig), Saig_ManPoNum(pAig), f*Saig_ManPoNum(pAig)+i );
Abc_Print( 1, "Output %d is trivially SAT in frame %d.\n", i, f );
ABC_FREE( pAig->pSeqModel );
pAig->pSeqModel = pCex;
goto finish;
}
pPars->nFailOuts++;
if ( !pPars->fNotVerbose )
Abc_Print( 1, "Output %*d was asserted in frame %2d (solved %*d out of %*d outputs).\n",
nOutDigits, i, f, nOutDigits, pPars->nFailOuts, nOutDigits, Saig_ManPoNum(pAig) );
if ( p->vCexes == NULL )
p->vCexes = Vec_PtrStart( Saig_ManPoNum(pAig) );
pCexNew = (p->pPars->fUseBridge || pPars->fStoreCex) ? Abc_CexMakeTriv( Aig_ManRegNum(pAig), Saig_ManPiNum(pAig), Saig_ManPoNum(pAig), f*Saig_ManPoNum(pAig)+i ) : (Abc_Cex_t *)(ABC_PTRINT_T)1;
if ( p->pPars->fUseBridge )
{
Gia_ManToBridgeResult( stdout, 0, pCexNew, pCexNew->iPo );
Abc_CexFree( pCexNew );
pCexNew = (Abc_Cex_t *)(ABC_PTRINT_T)1;
}
Vec_PtrWriteEntry( p->vCexes, i, pCexNew );
if ( pPars->pFuncOnFail && pPars->pFuncOnFail(i, pPars->fStoreCex ? (Abc_Cex_t *)Vec_PtrEntry(p->vCexes, i) : NULL) )
{
Abc_Print( 1, "Quitting due to callback on fail.\n" );
goto finish;
}
// reset the timeout
pPars->timeLastSolved = Abc_Clock();
nTimeToStop = Saig_ManBmcTimeToStop( pPars, nTimeToStopNG );
if ( nTimeToStop )
sat_solver_set_runtime_limit( p->pSat, nTimeToStop );
continue;
}
// solve this output
fUnfinished = 0;
sat_solver_compress( p->pSat );
@ -1523,7 +1535,8 @@ clk2 = Abc_Clock();
clkOne = Abc_Clock();
sat_solver_set_runtime_limit( p->pSat, p->pTime4Outs[i] + Abc_Clock() );
}
status = sat_solver_solve( p->pSat, &Lit, &Lit + 1, (ABC_INT64_T)pPars->nConfLimit, (ABC_INT64_T)0, (ABC_INT64_T)0, (ABC_INT64_T)0 );
// status = sat_solver_solve( p->pSat, &Lit, &Lit + 1, (ABC_INT64_T)pPars->nConfLimit, (ABC_INT64_T)0, (ABC_INT64_T)0, (ABC_INT64_T)0 );
status = Saig_ManCallSolver( p, Lit );
if ( p->pTime4Outs )
{
abctime timeSince = Abc_Clock() - clkOne;
@ -1535,7 +1548,7 @@ clk2 = Abc_Clock();
if ( status == l_False )
{
nTimeUnsat += Abc_Clock() - clk2;
if ( 1 )
if ( Lit != 0 )
{
// add final unit clause
Lit = lit_neg( Lit );
@ -1591,15 +1604,18 @@ nTimeSat += Abc_Clock() - clk2;
if ( p->vCexes == NULL )
p->vCexes = Vec_PtrStart( Saig_ManPoNum(pAig) );
pCexNew = (p->pPars->fUseBridge || pPars->fStoreCex) ? Saig_ManGenerateCex( p, f, i ) : (Abc_Cex_t *)(ABC_PTRINT_T)1;
pCexNew0 = NULL;
if ( p->pPars->fUseBridge )
{
Gia_ManToBridgeResult( stdout, 0, pCexNew, pCexNew->iPo );
Abc_CexFree( pCexNew );
//Abc_CexFree( pCexNew );
pCexNew0 = pCexNew;
pCexNew = (Abc_Cex_t *)(ABC_PTRINT_T)1;
}
Vec_PtrWriteEntry( p->vCexes, i, pCexNew );
if ( pPars->pFuncOnFail && pPars->pFuncOnFail(i, pPars->fStoreCex ? (Abc_Cex_t *)Vec_PtrEntry(p->vCexes, i) : NULL) )
{
Abc_CexFreeP( &pCexNew0 );
Abc_Print( 1, "Quitting due to callback on fail.\n" );
goto finish;
}
@ -1608,6 +1624,31 @@ nTimeSat += Abc_Clock() - clk2;
nTimeToStop = Saig_ManBmcTimeToStop( pPars, nTimeToStopNG );
if ( nTimeToStop )
sat_solver_set_runtime_limit( p->pSat, nTimeToStop );
// check if other outputs failed under the same counter-example
Saig_ManForEachPo( pAig, pObj, k )
{
if ( k >= Saig_ManPoNum(pAig) )
break;
// skip solved outputs
if ( p->vCexes && Vec_PtrEntry(p->vCexes, k) )
continue;
// check if this output is solved
Lit = Saig_ManBmcCreateCnf( p, pObj, f );
if ( sat_solver_var_value(p->pSat, lit_var(Lit)) == Abc_LitIsCompl(Lit) )
continue;
// write entry
pPars->nFailOuts++;
if ( !pPars->fNotVerbose )
Abc_Print( 1, "Output %*d was asserted in frame %2d (solved %*d out of %*d outputs).\n",
nOutDigits, k, f, nOutDigits, pPars->nFailOuts, nOutDigits, Saig_ManPoNum(pAig) );
// report to the bridge
if ( p->pPars->fUseBridge )
Gia_ManToBridgeResult( stdout, 0, pCexNew0, pCexNew0->iPo );
// remember solved output
Vec_PtrWriteEntry( p->vCexes, k, pCexNew );
}
Abc_CexFreeP( &pCexNew0 );
}
else
{