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Corner-case bug in PDR.

This commit is contained in:
Alan Mishchenko 2011-11-11 19:29:15 -08:00
parent 8e6d4d3fe9
commit 9fe4c74952
2 changed files with 9 additions and 2 deletions
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8
src/sat/pdr/pdrCore.c
View File

@ -443,7 +443,13 @@ int Pdr_ManBlockCube( Pdr_Man_t * p, Pdr_Set_t * pCube )
p->tContain += clock() - clk;
// check if the cube is already contained
if ( Pdr_ManCheckCubeCs( p, pThis->iFrame, pThis->pState ) ) // cube is blocked by clauses in this frame
RetValue = Pdr_ManCheckCubeCs( p, pThis->iFrame, pThis->pState );
if ( RetValue == -1 ) // cube is blocked by clauses in this frame
{
Pdr_OblDeref( pThis );
return -1;
}
if ( RetValue ) // cube is blocked by clauses in this frame
{
Pdr_OblDeref( pThis );
continue;

3
src/sat/pdr/pdrSat.c
View File

@ -246,7 +246,8 @@ int Pdr_ManCheckCubeCs( Pdr_Man_t * p, int k, Pdr_Set_t * pCube )
pSat = Pdr_ManFetchSolver( p, k );
vLits = Pdr_ManCubeToLits( p, k, pCube, 0, 0 );
RetValue = sat_solver_solve( pSat, Vec_IntArray(vLits), Vec_IntArray(vLits) + Vec_IntSize(vLits), 0, 0, 0, 0 );
assert( RetValue != l_Undef );
if ( RetValue == l_Undef )
return -1;
return (RetValue == l_False);
}