3 files changed, 4 insertions, 2 deletions
diff --git a/src/proof/pdr/pdr.h b/src/proof/pdr/pdr.h
index 51b04606..d8a548d5 100644
--- a/src/proof/pdr/pdr.h
+++ b/src/proof/pdr/pdr.h
@@ -83,6 +83,7 @@ struct Pdr_Par_t_
     int(*pFuncOnFail)(int,Abc_Cex_t*); // called for a failed output in MO mode
     abctime timeLastSolved; // the time when the last output was solved
     Vec_Int_t * vOutMap;  // in the multi-output mode, contains status for each PO (0 = sat; 1 = unsat; negative = undecided)
+    char * pInvFileName;  // invariable file name
 };
 
 ////////////////////////////////////////////////////////////////////////
diff --git a/src/proof/pdr/pdrCore.c b/src/proof/pdr/pdrCore.c
index 4e206b9a..f71569a3 100644
--- a/src/proof/pdr/pdrCore.c
+++ b/src/proof/pdr/pdrCore.c
@@ -79,6 +79,7 @@ void Pdr_ManSetDefaultParams( Pdr_Par_t * pPars )
     pPars->nFailOuts      =       0;  // the number of disproved outputs
     pPars->nDropOuts      =       0;  // the number of timed out outputs
     pPars->timeLastSolved =       0;  // last one solved
+    pPars->pInvFileName   =    NULL;  // invariant file name
 }
 
 /**Function*************************************************************
@@ -1424,7 +1425,7 @@ int Pdr_ManSolve( Aig_Man_t * pAig, Pdr_Par_t * pPars )
     }
     if ( p->pPars->fDumpInv )
     {
-        char * pFileName = Extra_FileNameGenericAppend(p->pAig->pName, "_inv.pla");
+        char * pFileName = pPars->pInvFileName ? pPars->pInvFileName : Extra_FileNameGenericAppend(p->pAig->pName, "_inv.pla");
         Abc_FrameSetInv( Pdr_ManDeriveInfinityClauses( p, RetValue!=1 ) );
         Pdr_ManDumpClauses( p, pFileName, RetValue==1 );
         printf( "Dumped inductive invariant in file \"%s\".\n", pFileName );
diff --git a/src/proof/pdr/pdrIncr.c b/src/proof/pdr/pdrIncr.c
index 186791b2..f4f2c8c8 100644
--- a/src/proof/pdr/pdrIncr.c
+++ b/src/proof/pdr/pdrIncr.c
@@ -843,7 +843,7 @@ int IPdr_ManSolve( Aig_Man_t * pAig, Pdr_Par_t * pPars )
         }
         if ( p->pPars->fDumpInv )
         {
-            char * pFileName = Extra_FileNameGenericAppend(p->pAig->pName, "_inv.pla");
+            char * pFileName = pPars->pInvFileName ? pPars->pInvFileName : Extra_FileNameGenericAppend(p->pAig->pName, "_inv.pla");
                 Abc_FrameSetInv( Pdr_ManDeriveInfinityClauses( p, RetValue!=1 ) );
                 Pdr_ManDumpClauses( p, pFileName, RetValue==1 );
         }