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Added generation of counter-examples in &reachm.

This commit is contained in:
Alan Mishchenko 2011-02-27 17:05:44 -08:00
parent 2f874d27fc
commit 02081dba67
4 changed files with 265 additions and 62 deletions
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1
src/aig/llb/llb1Core.c
View File

@ -208,6 +208,7 @@ int Llb_ManModelCheckGia( Gia_Man_t * pGia, Gia_ParLlb_t * pPars )
RetValue = Llb_ManModelCheckAig( pAig, pPars, NULL, NULL ); RetValue = Llb_ManModelCheckAig( pAig, pPars, NULL, NULL );
else else
RetValue = Llb_ManModelCheckAigWithHints( pAig, pPars ); RetValue = Llb_ManModelCheckAigWithHints( pAig, pPars );
pGia->pCexSeq = pAig->pSeqModel; pAig->pSeqModel = NULL;
Aig_ManStop( pAig ); Aig_ManStop( pAig );
return RetValue; return RetValue;
} }

51
src/aig/llb/llb1Man.c
View File

@ -47,9 +47,13 @@ void Llb_ManPrepareVarMap( Llb_Man_t * p )
Aig_Obj_t * pObjLi, * pObjLo; Aig_Obj_t * pObjLi, * pObjLo;
int i, iVarLi, iVarLo; int i, iVarLi, iVarLo;
assert( p->vNs2Glo == NULL ); assert( p->vNs2Glo == NULL );
assert( p->vCs2Glo == NULL );
assert( p->vGlo2Cs == NULL ); assert( p->vGlo2Cs == NULL );
assert( p->vGlo2Ns == NULL );
p->vNs2Glo = Vec_IntStartFull( Vec_IntSize(p->vVar2Obj) ); p->vNs2Glo = Vec_IntStartFull( Vec_IntSize(p->vVar2Obj) );
p->vCs2Glo = Vec_IntStartFull( Vec_IntSize(p->vVar2Obj) );
p->vGlo2Cs = Vec_IntStartFull( Aig_ManRegNum(p->pAig) ); p->vGlo2Cs = Vec_IntStartFull( Aig_ManRegNum(p->pAig) );
p->vGlo2Ns = Vec_IntStartFull( Aig_ManRegNum(p->pAig) );
Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i ) Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
{ {
iVarLi = Vec_IntEntry(p->vObj2Var, Aig_ObjId(pObjLi)); iVarLi = Vec_IntEntry(p->vObj2Var, Aig_ObjId(pObjLi));
@ -57,7 +61,16 @@ void Llb_ManPrepareVarMap( Llb_Man_t * p )
assert( iVarLi >= 0 && iVarLi < Vec_IntSize(p->vVar2Obj) ); assert( iVarLi >= 0 && iVarLi < Vec_IntSize(p->vVar2Obj) );
assert( iVarLo >= 0 && iVarLo < Vec_IntSize(p->vVar2Obj) ); assert( iVarLo >= 0 && iVarLo < Vec_IntSize(p->vVar2Obj) );
Vec_IntWriteEntry( p->vNs2Glo, iVarLi, i ); Vec_IntWriteEntry( p->vNs2Glo, iVarLi, i );
Vec_IntWriteEntry( p->vCs2Glo, iVarLo, i );
Vec_IntWriteEntry( p->vGlo2Cs, i, iVarLo ); Vec_IntWriteEntry( p->vGlo2Cs, i, iVarLo );
Vec_IntWriteEntry( p->vGlo2Ns, i, iVarLi );
}
// add mapping of the PIs
Saig_ManForEachPi( p->pAig, pObjLo, i )
{
iVarLo = Vec_IntEntry(p->vObj2Var, Aig_ObjId(pObjLo));
Vec_IntWriteEntry( p->vCs2Glo, iVarLo, Aig_ManRegNum(p->pAig)+i );
Vec_IntWriteEntry( p->vNs2Glo, iVarLo, Aig_ManRegNum(p->pAig)+i );
} }
} }
@ -117,6 +130,7 @@ void Llb_ManPrepareVarLimits( Llb_Man_t * p )
void Llb_ManStop( Llb_Man_t * p ) void Llb_ManStop( Llb_Man_t * p )
{ {
Llb_Grp_t * pGrp; Llb_Grp_t * pGrp;
DdNode * bTemp;
int i; int i;
// Vec_IntFreeP( &p->vMem ); // Vec_IntFreeP( &p->vMem );
@ -128,25 +142,39 @@ void Llb_ManStop( Llb_Man_t * p )
Llb_MtrFree( p->pMatrix ); Llb_MtrFree( p->pMatrix );
Vec_PtrForEachEntry( Llb_Grp_t *, p->vGroups, pGrp, i ) Vec_PtrForEachEntry( Llb_Grp_t *, p->vGroups, pGrp, i )
Llb_ManGroupStop( pGrp ); Llb_ManGroupStop( pGrp );
if ( p->dd )
{
// printf( "Manager dd\n" );
Extra_StopManager( p->dd );
}
if ( p->ddG )
{
// printf( "Manager ddG\n" );
if ( p->ddG->bFunc )
Cudd_RecursiveDeref( p->ddG, p->ddG->bFunc );
Extra_StopManager( p->ddG );
}
if ( p->ddR )
{
// printf( "Manager ddR\n" );
if ( p->ddR->bFunc )
Cudd_RecursiveDeref( p->ddR, p->ddR->bFunc );
Vec_PtrForEachEntry( DdNode *, p->vRings, bTemp, i )
Cudd_RecursiveDeref( p->ddR, bTemp );
Extra_StopManager( p->ddR );
}
Aig_ManStop( p->pAig );
Vec_PtrFreeP( &p->vGroups ); Vec_PtrFreeP( &p->vGroups );
Vec_IntFreeP( &p->vVar2Obj ); Vec_IntFreeP( &p->vVar2Obj );
Vec_IntFreeP( &p->vObj2Var ); Vec_IntFreeP( &p->vObj2Var );
Vec_IntFreeP( &p->vVarBegs ); Vec_IntFreeP( &p->vVarBegs );
Vec_IntFreeP( &p->vVarEnds ); Vec_IntFreeP( &p->vVarEnds );
Vec_PtrFreeP( &p->vRings );
Vec_IntFreeP( &p->vNs2Glo ); Vec_IntFreeP( &p->vNs2Glo );
Vec_IntFreeP( &p->vCs2Glo );
Vec_IntFreeP( &p->vGlo2Cs ); Vec_IntFreeP( &p->vGlo2Cs );
Vec_IntFreeP( &p->vGlo2Ns );
// Vec_IntFreeP( &p->vHints ); // Vec_IntFreeP( &p->vHints );
if ( p->dd )
{
Extra_StopManager( p->dd );
}
if ( p->ddG )
{
if ( p->ddG->bFunc )
Cudd_RecursiveDeref( p->ddG, p->ddG->bFunc );
Extra_StopManager( p->ddG );
}
Aig_ManStop( p->pAig );
ABC_FREE( p ); ABC_FREE( p );
} }
@ -172,6 +200,7 @@ Llb_Man_t * Llb_ManStart( Aig_Man_t * pAigGlo, Aig_Man_t * pAig, Gia_ParLlb_t *
p->pAig = pAig; p->pAig = pAig;
p->vVar2Obj = Llb_ManMarkPivotNodes( p->pAig, pPars->fUsePivots ); p->vVar2Obj = Llb_ManMarkPivotNodes( p->pAig, pPars->fUsePivots );
p->vObj2Var = Vec_IntInvert( p->vVar2Obj, -1 ); p->vObj2Var = Vec_IntInvert( p->vVar2Obj, -1 );
p->vRings = Vec_PtrAlloc( 100 );
Llb_ManPrepareVarMap( p ); Llb_ManPrepareVarMap( p );
Llb_ManPrepareGroups( p ); Llb_ManPrepareGroups( p );
Aig_ManCleanMarkA( pAig ); Aig_ManCleanMarkA( pAig );

267
src/aig/llb/llb1Reach.c
View File

@ -152,7 +152,7 @@ DdNode * Llb_ManConstructGroupBdd( Llb_Man_t * p, Llb_Grp_t * pGroup )
SeeAlso [] SeeAlso []
***********************************************************************/ ***********************************************************************/
DdNode * Llb_ManConstructQuantCubeIntern( Llb_Man_t * p, Llb_Grp_t * pGroup, int iGrpPlace ) DdNode * Llb_ManConstructQuantCubeIntern( Llb_Man_t * p, Llb_Grp_t * pGroup, int iGrpPlace, int fBackward )
{ {
Aig_Obj_t * pObj; Aig_Obj_t * pObj;
DdNode * bRes, * bTemp, * bVar; DdNode * bRes, * bTemp, * bVar;
@ -162,6 +162,8 @@ DdNode * Llb_ManConstructQuantCubeIntern( Llb_Man_t * p, Llb_Grp_t * pGroup, int
bRes = Cudd_ReadOne( p->dd ); Cudd_Ref( bRes ); bRes = Cudd_ReadOne( p->dd ); Cudd_Ref( bRes );
Vec_PtrForEachEntry( Aig_Obj_t *, pGroup->vIns, pObj, i ) Vec_PtrForEachEntry( Aig_Obj_t *, pGroup->vIns, pObj, i )
{ {
if ( fBackward && Saig_ObjIsPi(p->pAig, pObj) )
continue;
iGroupFirst = Vec_IntEntry(p->vVarBegs, Aig_ObjId(pObj)); iGroupFirst = Vec_IntEntry(p->vVarBegs, Aig_ObjId(pObj));
iGroupLast = Vec_IntEntry(p->vVarEnds, Aig_ObjId(pObj)); iGroupLast = Vec_IntEntry(p->vVarEnds, Aig_ObjId(pObj));
assert( iGroupFirst <= iGroupLast ); assert( iGroupFirst <= iGroupLast );
@ -173,6 +175,8 @@ DdNode * Llb_ManConstructQuantCubeIntern( Llb_Man_t * p, Llb_Grp_t * pGroup, int
} }
Vec_PtrForEachEntry( Aig_Obj_t *, pGroup->vOuts, pObj, i ) Vec_PtrForEachEntry( Aig_Obj_t *, pGroup->vOuts, pObj, i )
{ {
if ( fBackward && Saig_ObjIsPi(p->pAig, pObj) )
continue;
iGroupFirst = Vec_IntEntry(p->vVarBegs, Aig_ObjId(pObj)); iGroupFirst = Vec_IntEntry(p->vVarBegs, Aig_ObjId(pObj));
iGroupLast = Vec_IntEntry(p->vVarEnds, Aig_ObjId(pObj)); iGroupLast = Vec_IntEntry(p->vVarEnds, Aig_ObjId(pObj));
assert( iGroupFirst <= iGroupLast ); assert( iGroupFirst <= iGroupLast );
@ -198,7 +202,7 @@ DdNode * Llb_ManConstructQuantCubeIntern( Llb_Man_t * p, Llb_Grp_t * pGroup, int
SeeAlso [] SeeAlso []
***********************************************************************/ ***********************************************************************/
DdNode * Llb_ManConstructQuantCube( Llb_Man_t * p, Llb_Grp_t * pGroup, int iGrpPlace ) DdNode * Llb_ManConstructQuantCubeFwd( Llb_Man_t * p, Llb_Grp_t * pGroup, int iGrpPlace )
{ {
Aig_Obj_t * pObj; Aig_Obj_t * pObj;
DdNode * bRes, * bTemp, * bVar; DdNode * bRes, * bTemp, * bVar;
@ -230,6 +234,53 @@ DdNode * Llb_ManConstructQuantCube( Llb_Man_t * p, Llb_Grp_t * pGroup, int iGrpP
return bRes; return bRes;
} }
/**Function*************************************************************
Synopsis [Derives quantification cube.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
DdNode * Llb_ManConstructQuantCubeBwd( Llb_Man_t * p, Llb_Grp_t * pGroup, int iGrpPlace )
{
Aig_Obj_t * pObj;
DdNode * bRes, * bTemp, * bVar;
int i, iGroupFirst, TimeStop;
TimeStop = p->dd->TimeStop; p->dd->TimeStop = 0;
bRes = Cudd_ReadOne( p->dd ); Cudd_Ref( bRes );
Vec_PtrForEachEntry( Aig_Obj_t *, pGroup->vIns, pObj, i )
{
if ( Saig_ObjIsPi(p->pAig, pObj) )
continue;
iGroupFirst = Vec_IntEntry(p->vVarBegs, Aig_ObjId(pObj));
assert( iGroupFirst <= iGrpPlace );
if ( iGroupFirst < iGrpPlace )
continue;
bVar = Cudd_bddIthVar( p->dd, Vec_IntEntry(p->vObj2Var, Aig_ObjId(pObj)) );
bRes = Cudd_bddAnd( p->dd, bTemp = bRes, bVar ); Cudd_Ref( bRes );
Cudd_RecursiveDeref( p->dd, bTemp );
}
Vec_PtrForEachEntry( Aig_Obj_t *, pGroup->vOuts, pObj, i )
{
if ( Saig_ObjIsPi(p->pAig, pObj) )
continue;
iGroupFirst = Vec_IntEntry(p->vVarBegs, Aig_ObjId(pObj));
assert( iGroupFirst <= iGrpPlace );
if ( iGroupFirst < iGrpPlace )
continue;
bVar = Cudd_bddIthVar( p->dd, Vec_IntEntry(p->vObj2Var, Aig_ObjId(pObj)) );
bRes = Cudd_bddAnd( p->dd, bTemp = bRes, bVar ); Cudd_Ref( bRes );
Cudd_RecursiveDeref( p->dd, bTemp );
}
Cudd_Deref( bRes );
p->dd->TimeStop = TimeStop;
return bRes;
}
/**Function************************************************************* /**Function*************************************************************
Synopsis [] Synopsis []
@ -271,17 +322,22 @@ DdNode * Llb_ManComputeInitState( Llb_Man_t * p, DdManager * dd )
SeeAlso [] SeeAlso []
***********************************************************************/ ***********************************************************************/
DdNode * Llb_ManComputeImage( Llb_Man_t * p, DdNode * bInit ) DdNode * Llb_ManComputeImage( Llb_Man_t * p, DdNode * bInit, int fBackward )
{ {
int fCheckSupport = 0; int fCheckSupport = 0;
Llb_Grp_t * pGroup; Llb_Grp_t * pGroup;
DdNode * bImage, * bGroup, * bCube, * bTemp; DdNode * bImage, * bGroup, * bCube, * bTemp;
int i; int k, Index;
bImage = bInit; Cudd_Ref( bImage ); bImage = bInit; Cudd_Ref( bImage );
for ( i = 1; i < p->pMatrix->nCols-1; i++ ) for ( k = 1; k < p->pMatrix->nCols-1; k++ )
{ {
if ( fBackward )
Index = p->pMatrix->nCols - 1 - k;
else
Index = k;
// compute group BDD // compute group BDD
pGroup = p->pMatrix->pColGrps[i]; pGroup = p->pMatrix->pColGrps[Index];
bGroup = Llb_ManConstructGroupBdd( p, pGroup ); bGroup = Llb_ManConstructGroupBdd( p, pGroup );
if ( bGroup == NULL ) if ( bGroup == NULL )
{ {
@ -290,7 +346,7 @@ DdNode * Llb_ManComputeImage( Llb_Man_t * p, DdNode * bInit )
} }
Cudd_Ref( bGroup ); Cudd_Ref( bGroup );
// quantify variables appearing only in this group // quantify variables appearing only in this group
bCube = Llb_ManConstructQuantCubeIntern( p, pGroup, i ); Cudd_Ref( bCube ); bCube = Llb_ManConstructQuantCubeIntern( p, pGroup, Index, fBackward ); Cudd_Ref( bCube );
bGroup = Cudd_bddExistAbstract( p->dd, bTemp = bGroup, bCube ); bGroup = Cudd_bddExistAbstract( p->dd, bTemp = bGroup, bCube );
if ( bGroup == NULL ) if ( bGroup == NULL )
{ {
@ -302,7 +358,11 @@ DdNode * Llb_ManComputeImage( Llb_Man_t * p, DdNode * bInit )
Cudd_RecursiveDeref( p->dd, bTemp ); Cudd_RecursiveDeref( p->dd, bTemp );
Cudd_RecursiveDeref( p->dd, bCube ); Cudd_RecursiveDeref( p->dd, bCube );
// perform partial product // perform partial product
bCube = Llb_ManConstructQuantCube( p, pGroup, i ); Cudd_Ref( bCube ); if ( fBackward )
bCube = Llb_ManConstructQuantCubeBwd( p, pGroup, Index );
else
bCube = Llb_ManConstructQuantCubeFwd( p, pGroup, Index );
Cudd_Ref( bCube );
// bImage = Extra_bddAndAbstractTime( p->dd, bTemp = bImage, bGroup, bCube, p->pPars->TimeTarget ); // bImage = Extra_bddAndAbstractTime( p->dd, bTemp = bImage, bGroup, bCube, p->pPars->TimeTarget );
bImage = Cudd_bddAndAbstract( p->dd, bTemp = bImage, bGroup, bCube ); bImage = Cudd_bddAndAbstract( p->dd, bTemp = bImage, bGroup, bCube );
if ( bImage == NULL ) if ( bImage == NULL )
@ -393,7 +453,7 @@ DdNode * Llb_ManCreateConstraints( Llb_Man_t * p, Vec_Int_t * vHints, int fUseNs
/**Function************************************************************* /**Function*************************************************************
Synopsis [] Synopsis [Perform reachability with hints and returns reached states in ppGlo.]
Description [] Description []
@ -402,9 +462,106 @@ DdNode * Llb_ManCreateConstraints( Llb_Man_t * p, Vec_Int_t * vHints, int fUseNs
SeeAlso [] SeeAlso []
***********************************************************************/ ***********************************************************************/
Abc_Cex_t * Llb_ManDeriveCex( Llb_Man_t * p, DdNode * bInter, int iOutFail, int iIter ) Abc_Cex_t * Llb_ManReachDeriveCex( Llb_Man_t * p )
{ {
return NULL; Abc_Cex_t * pCex;
Aig_Obj_t * pObj;
DdNode * bState, * bImage, * bOneCube, * bTemp, * bRing;
int i, v, RetValue, nPiOffset;
char * pValues = ABC_ALLOC( char, Cudd_ReadSize(p->ddR) );
assert( Vec_PtrSize(p->vRings) > 0 );
p->dd->TimeStop = 0;
p->ddR->TimeStop = 0;
/*
Saig_ManForEachLo( p->pAig, pObj, i )
printf( "%d ", pObj->Id );
printf( "\n" );
Saig_ManForEachLi( p->pAig, pObj, i )
printf( "%d(%d) ", pObj->Id, Aig_ObjFaninId0(pObj) );
printf( "\n" );
*/
// allocate room for the counter-example
pCex = Abc_CexAlloc( Saig_ManRegNum(p->pAig), Saig_ManPiNum(p->pAig), Vec_PtrSize(p->vRings) );
pCex->iFrame = Vec_PtrSize(p->vRings) - 1;
pCex->iPo = -1;
// get the last cube
bOneCube = Cudd_bddIntersect( p->ddR, (DdNode *)Vec_PtrEntryLast(p->vRings), p->ddR->bFunc ); Cudd_Ref( bOneCube );
RetValue = Cudd_bddPickOneCube( p->ddR, bOneCube, pValues );
Cudd_RecursiveDeref( p->ddR, bOneCube );
assert( RetValue );
// write PIs of counter-example
nPiOffset = Saig_ManRegNum(p->pAig) + Saig_ManPiNum(p->pAig) * (Vec_PtrSize(p->vRings) - 1);
Saig_ManForEachPi( p->pAig, pObj, i )
if ( pValues[Saig_ManRegNum(p->pAig)+i] == 1 )
Aig_InfoSetBit( pCex->pData, nPiOffset + i );
// write state in terms of NS variables
if ( Vec_PtrSize(p->vRings) > 1 )
{
bState = Llb_CoreComputeCube( p->dd, p->vGlo2Ns, 1, pValues ); Cudd_Ref( bState );
}
// perform backward analysis
Vec_PtrForEachEntryReverse( DdNode *, p->vRings, bRing, v )
{
if ( v == Vec_PtrSize(p->vRings) - 1 )
continue;
//Extra_bddPrintSupport( p->dd, bState ); printf( "\n" );
//Extra_bddPrintSupport( p->dd, bRing ); printf( "\n" );
// compute the next states
bImage = Llb_ManComputeImage( p, bState, 1 );
assert( bImage != NULL );
Cudd_Ref( bImage );
Cudd_RecursiveDeref( p->dd, bState );
//Extra_bddPrintSupport( p->dd, bImage ); printf( "\n" );
// move reached states into ring manager
bImage = Extra_TransferPermute( p->dd, p->ddR, bTemp = bImage, Vec_IntArray(p->vCs2Glo) ); Cudd_Ref( bImage );
Cudd_RecursiveDeref( p->dd, bTemp );
//Extra_bddPrintSupport( p->ddR, bImage ); printf( "\n" );
// intersect with the previous set
bOneCube = Cudd_bddIntersect( p->ddR, bImage, bRing ); Cudd_Ref( bOneCube );
Cudd_RecursiveDeref( p->ddR, bImage );
// find any assignment of the BDD
RetValue = Cudd_bddPickOneCube( p->ddR, bOneCube, pValues );
Cudd_RecursiveDeref( p->ddR, bOneCube );
assert( RetValue );
/*
for ( i = 0; i < p->ddR->size; i++ )
printf( "%d ", pValues[i] );
printf( "\n" );
*/
// write PIs of counter-example
nPiOffset -= Saig_ManPiNum(p->pAig);
Saig_ManForEachPi( p->pAig, pObj, i )
if ( pValues[Saig_ManRegNum(p->pAig)+i] == 1 )
Aig_InfoSetBit( pCex->pData, nPiOffset + i );
// check that we get the init state
if ( v == 0 )
{
Saig_ManForEachLo( p->pAig, pObj, i )
assert( pValues[i] == 0 );
break;
}
// write state in terms of NS variables
bState = Llb_CoreComputeCube( p->dd, p->vGlo2Ns, 1, pValues ); Cudd_Ref( bState );
}
assert( nPiOffset == Saig_ManRegNum(p->pAig) );
// update the output number
//Abc_CexPrint( pCex );
RetValue = Saig_ManFindFailedPoCex( p->pAigGlo, pCex );
assert( RetValue >= 0 && RetValue < Saig_ManPoNum(p->pAigGlo) ); // invalid CEX!!!
pCex->iPo = RetValue;
// cleanup
ABC_FREE( pValues );
return pCex;
} }
/**Function************************************************************* /**Function*************************************************************
@ -420,12 +577,12 @@ Abc_Cex_t * Llb_ManDeriveCex( Llb_Man_t * p, DdNode * bInter, int iOutFail, int
***********************************************************************/ ***********************************************************************/
int Llb_ManReachability( Llb_Man_t * p, Vec_Int_t * vHints, DdManager ** pddGlo ) int Llb_ManReachability( Llb_Man_t * p, Vec_Int_t * vHints, DdManager ** pddGlo )
{ {
int fCheckOutputs = !p->pPars->fSkipOutCheck;
int * pNs2Glo = Vec_IntArray( p->vNs2Glo ); int * pNs2Glo = Vec_IntArray( p->vNs2Glo );
int * pCs2Glo = Vec_IntArray( p->vCs2Glo );
int * pGlo2Cs = Vec_IntArray( p->vGlo2Cs ); int * pGlo2Cs = Vec_IntArray( p->vGlo2Cs );
DdNode * bCurrent, * bReached, * bNext, * bTemp, * bCube; DdNode * bCurrent, * bReached, * bNext, * bTemp, * bCube;
DdNode * bConstrCs, * bConstrNs; DdNode * bConstrCs, * bConstrNs;
int clk2, clk = clock(), nIters, nBddSize = 0, iOutFail = -1; int clk2, clk = clock(), nIters, nBddSize = 0;
int nThreshold = 10000; int nThreshold = 10000;
// compute time to stop // compute time to stop
@ -440,7 +597,9 @@ int Llb_ManReachability( Llb_Man_t * p, Vec_Int_t * vHints, DdManager ** pddGlo
// start the managers // start the managers
assert( p->dd == NULL ); assert( p->dd == NULL );
assert( p->ddG == NULL ); assert( p->ddG == NULL );
assert( p->ddR == NULL );
p->dd = Cudd_Init( Vec_IntSize(p->vVar2Obj), 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 ); p->dd = Cudd_Init( Vec_IntSize(p->vVar2Obj), 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
p->ddR = Cudd_Init( Aig_ManPiNum(p->pAig), 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
if ( pddGlo && *pddGlo ) if ( pddGlo && *pddGlo )
p->ddG = *pddGlo, *pddGlo = NULL; p->ddG = *pddGlo, *pddGlo = NULL;
else else
@ -450,16 +609,29 @@ int Llb_ManReachability( Llb_Man_t * p, Vec_Int_t * vHints, DdManager ** pddGlo
{ {
Cudd_AutodynEnable( p->dd, CUDD_REORDER_SYMM_SIFT ); Cudd_AutodynEnable( p->dd, CUDD_REORDER_SYMM_SIFT );
Cudd_AutodynEnable( p->ddG, CUDD_REORDER_SYMM_SIFT ); Cudd_AutodynEnable( p->ddG, CUDD_REORDER_SYMM_SIFT );
Cudd_AutodynEnable( p->ddR, CUDD_REORDER_SYMM_SIFT );
} }
else else
{ {
Cudd_AutodynDisable( p->dd ); Cudd_AutodynDisable( p->dd );
Cudd_AutodynDisable( p->ddG ); Cudd_AutodynDisable( p->ddG );
Cudd_AutodynDisable( p->ddR );
} }
// set the stop time parameter // set the stop time parameter
p->dd->TimeStop = p->pPars->TimeTarget; p->dd->TimeStop = p->pPars->TimeTarget;
p->ddG->TimeStop = p->pPars->TimeTarget; p->ddG->TimeStop = p->pPars->TimeTarget;
p->ddR->TimeStop = p->pPars->TimeTarget;
// create bad state in the ring manager
p->ddR->bFunc = Llb_BddComputeBad( p->pAigGlo, p->ddR, p->pPars->TimeTarget );
if ( p->ddR->bFunc == NULL )
{
if ( !p->pPars->fSilent )
printf( "Reached timeout (%d seconds) during constructing the bad states.\n", p->pPars->TimeLimit );
return -1;
}
Cudd_Ref( p->ddR->bFunc );
// derive constraints // derive constraints
bConstrCs = Llb_ManCreateConstraints( p, vHints, 0 ); Cudd_Ref( bConstrCs ); bConstrCs = Llb_ManCreateConstraints( p, vHints, 0 ); Cudd_Ref( bConstrCs );
@ -499,44 +671,41 @@ int Llb_ManReachability( Llb_Man_t * p, Vec_Int_t * vHints, DdManager ** pddGlo
return -1; return -1;
} }
// check outputs // save the onion ring
if ( fCheckOutputs ) bTemp = Extra_TransferPermute( p->dd, p->ddR, bCurrent, pCs2Glo );
{ if ( bTemp == NULL )
Aig_Obj_t * pObj;
int i;
Aig_ManConst1( p->pAigGlo )->pData = Cudd_ReadOne( p->dd );
Aig_ManForEachPi( p->pAig, pObj, i )
pObj->pData = Cudd_bddIthVar( p->dd, Vec_IntEntry(p->vObj2Var,Aig_ObjId(pObj)) );
Aig_ManForEachPi( p->pAigGlo, pObj, i )
pObj->pData = Aig_ManPi(p->pAig, i)->pData;
//Extra_bddPrintSupport( p->dd, bCurrent ); printf( "\n" );
for ( iOutFail = 0; iOutFail < Saig_ManPoNum(p->pAig); iOutFail++ )
{
DdNode * bFunc, * bInter;
bFunc = Llb_ManConstructOutBdd( p->pAigGlo, Aig_ManPo(p->pAigGlo, iOutFail), p->dd ); Cudd_Ref( bFunc );
//Extra_bddPrint( p->dd, bFunc ); printf( "\n" );
if ( Cudd_bddLeq( p->dd, bCurrent, Cudd_Not(bFunc) ) ) // no cex
{
Cudd_RecursiveDeref( p->dd, bFunc );
continue;
}
bInter = Cudd_bddIntersect( p->dd, bCurrent, bFunc ); Cudd_Ref( bInter );
assert( p->pAig->pSeqModel == NULL );
p->pAig->pSeqModel = Llb_ManDeriveCex( p, bInter, iOutFail, nIters );
Cudd_RecursiveDeref( p->dd, bInter );
Cudd_RecursiveDeref( p->dd, bFunc );
break;
}
if ( iOutFail < Saig_ManPoNum(p->pAig) )
{ {
if ( !p->pPars->fSilent ) if ( !p->pPars->fSilent )
printf( "Output %d was asserted in frame %d (use \"write_counter\" to dump a witness). ", iOutFail, nIters ); printf( "Reached timeout (%d seconds) during ring transfer.\n", p->pPars->TimeLimit );
Cudd_RecursiveDeref( p->ddG, bReached ); bReached = NULL; p->pPars->iFrame = nIters - 1;
Cudd_RecursiveDeref( p->dd, bCurrent ); bCurrent = NULL; Cudd_RecursiveDeref( p->dd, bCurrent ); bCurrent = NULL;
p->pPars->iFrame = nIters; Cudd_RecursiveDeref( p->dd, bConstrCs ); bConstrCs = NULL;
break; Cudd_RecursiveDeref( p->dd, bConstrNs ); bConstrNs = NULL;
Cudd_RecursiveDeref( p->ddG, bReached ); bReached = NULL;
return -1;
} }
Cudd_Ref( bTemp );
Vec_PtrPush( p->vRings, bTemp );
// check it for bad states
if ( !p->pPars->fSkipOutCheck && !Cudd_bddLeq( p->ddR, bTemp, Cudd_Not(p->ddR->bFunc) ) )
{
assert( p->pAigGlo->pSeqModel == NULL );
if ( !p->pPars->fBackward )
p->pAigGlo->pSeqModel = Llb_ManReachDeriveCex( p );
if ( !p->pPars->fSilent )
{
if ( !p->pPars->fBackward )
printf( "Output %d was asserted in frame %d (use \"write_counter\" to dump a witness). ", p->pAigGlo->pSeqModel->iPo, nIters );
else
printf( "Output ??? was asserted in frame %d (counter-example is not produced). ", nIters );
Abc_PrintTime( 1, "Time", clock() - clk );
}
Cudd_RecursiveDeref( p->dd, bCurrent ); bCurrent = NULL;
Cudd_RecursiveDeref( p->dd, bConstrCs ); bConstrCs = NULL;
Cudd_RecursiveDeref( p->dd, bConstrNs ); bConstrNs = NULL;
Cudd_RecursiveDeref( p->ddG, bReached ); bReached = NULL;
return 0;
} }
// restrict reachable states using constraints // restrict reachable states using constraints
@ -547,13 +716,13 @@ int Llb_ManReachability( Llb_Man_t * p, Vec_Int_t * vHints, DdManager ** pddGlo
} }
// quantify variables appearing only in the init state // quantify variables appearing only in the init state
bCube = Llb_ManConstructQuantCubeIntern( p, (Llb_Grp_t *)Vec_PtrEntry(p->vGroups,0), 0 ); Cudd_Ref( bCube ); bCube = Llb_ManConstructQuantCubeIntern( p, (Llb_Grp_t *)Vec_PtrEntry(p->vGroups,0), 0, 0 ); Cudd_Ref( bCube );
bCurrent = Cudd_bddExistAbstract( p->dd, bTemp = bCurrent, bCube ); Cudd_Ref( bCurrent ); bCurrent = Cudd_bddExistAbstract( p->dd, bTemp = bCurrent, bCube ); Cudd_Ref( bCurrent );
Cudd_RecursiveDeref( p->dd, bTemp ); Cudd_RecursiveDeref( p->dd, bTemp );
Cudd_RecursiveDeref( p->dd, bCube ); Cudd_RecursiveDeref( p->dd, bCube );
// compute the next states // compute the next states
bNext = Llb_ManComputeImage( p, bCurrent ); bNext = Llb_ManComputeImage( p, bCurrent, 0 );
if ( bNext == NULL ) if ( bNext == NULL )
{ {
if ( !p->pPars->fSilent ) if ( !p->pPars->fSilent )

4
src/aig/llb/llbInt.h
View File

@ -55,16 +55,20 @@ struct Llb_Man_t_
Aig_Man_t * pAig; // derived AIG manager (created in this package) Aig_Man_t * pAig; // derived AIG manager (created in this package)
DdManager * dd; // BDD manager DdManager * dd; // BDD manager
DdManager * ddG; // BDD manager DdManager * ddG; // BDD manager
DdManager * ddR; // BDD manager
Vec_Int_t * vObj2Var; // mapping AIG ObjId into BDD var index Vec_Int_t * vObj2Var; // mapping AIG ObjId into BDD var index
Vec_Int_t * vVar2Obj; // mapping BDD var index into AIG ObjId Vec_Int_t * vVar2Obj; // mapping BDD var index into AIG ObjId
Vec_Ptr_t * vGroups; // group Id into group pointer Vec_Ptr_t * vGroups; // group Id into group pointer
Llb_Mtr_t * pMatrix; // dependency matrix Llb_Mtr_t * pMatrix; // dependency matrix
// image computation // image computation
Vec_Ptr_t * vRings; // onion rings
Vec_Int_t * vVarBegs; // the first group where the var appears Vec_Int_t * vVarBegs; // the first group where the var appears
Vec_Int_t * vVarEnds; // the last group where the var appears Vec_Int_t * vVarEnds; // the last group where the var appears
// variable mapping // variable mapping
Vec_Int_t * vNs2Glo; // next state variables into global variables Vec_Int_t * vNs2Glo; // next state variables into global variables
Vec_Int_t * vCs2Glo; // next state variables into global variables
Vec_Int_t * vGlo2Cs; // global variables into current state variables Vec_Int_t * vGlo2Cs; // global variables into current state variables
Vec_Int_t * vGlo2Ns; // global variables into current state variables
// flow computation // flow computation
// Vec_Int_t * vMem; // Vec_Int_t * vMem;
// Vec_Ptr_t * vTops; // Vec_Ptr_t * vTops;