Added command 'cexcut' and 'cexmerge'.

1 files changed, 51 insertions, 16 deletions

diff --git a/src/sat/bmc/bmcCexCut.c b/src/sat/bmc/bmcCexCut.c
index 96d46fb3..bbb1bc73 100644
--- a/src/sat/bmc/bmcCexCut.c
+++ b/src/sat/bmc/bmcCexCut.c
@@ -6,7 +6,7 @@
 
   PackageName [SAT-based bounded model checking.]
 
-  Synopsis    []
+  Synopsis    [Derives characterization of bad states.]
 
   Author      [Alan Mishchenko]
   
@@ -19,6 +19,7 @@
 ***********************************************************************/
 
 #include "bmc.h"
+#include "aig/gia/giaAig.h"
 
 ABC_NAMESPACE_IMPL_START
 
@@ -47,7 +48,7 @@ Gia_Man_t * Bmc_GiaTargetStates( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, in
     Gia_Man_t * pNew, * pTemp;
     Gia_Obj_t * pObj, * pObjRo, * pObjRi;
     Vec_Bit_t * vInitNew;
-    int i, k, iBit = 0;
+    int i, k, iBit = 0, fCompl0, fCompl1;
 
     if ( iFrBeg < 0 )
         { printf( "Starting frame is less than 0.\n" ); return NULL; }
@@ -57,7 +58,7 @@ Gia_Man_t * Bmc_GiaTargetStates( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, in
         { printf( "Starting frame is more than the last frame of CEX (%d).\n", pCex->iFrame ); return NULL; }
     if ( iFrEnd > pCex->iFrame )
         { printf( "Stopping frame is more than the last frame of CEX (%d).\n", pCex->iFrame ); return NULL; }
-    if ( iFrBeg >= iFrEnd )
+    if ( iFrBeg > iFrEnd )
         { printf( "Starting frame (%d) should be less than stopping frame (%d).\n", iFrBeg, iFrEnd ); return NULL; }
     assert( iFrBeg >= 0 && iFrBeg <= pCex->iFrame );
     assert( iFrEnd >= 0 && iFrEnd <= pCex->iFrame );
@@ -65,7 +66,7 @@ Gia_Man_t * Bmc_GiaTargetStates( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, in
 
     // skip trough the first iFrEnd frames
     Gia_ManCleanMark0(p);
-    Gia_ManForEachRo( p, pObj, i )
+    Gia_ManForEachRo( p, pObj, k )
         pObj->fMark0 = Abc_InfoHasBit(pCex->pData, iBit++);
     vInitNew = Vec_BitStart( Gia_ManRegNum(p) );
     for ( i = 0; i < iFrEnd; i++ )
@@ -90,35 +91,39 @@ Gia_Man_t * Bmc_GiaTargetStates( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, in
 
     // create new AIG manager
     pNew = Gia_ManStart( 10000 );
+    pNew->pName = Abc_UtilStrsav( p->pName );
     Gia_ManConst0(p)->Value = 1;
     Gia_ManForEachPi( p, pObj, k )
         pObj->Value = 1;
-    Gia_ManForEachRo( p, pObjRo, i )
-        pObj->Value = Abc_LitNotCond( Gia_ManAppendCi(pNew), !pObjRo->fMark0 );
-    Gia_ManHashStart( p );
+    Gia_ManForEachRo( p, pObjRo, k )
+        pObjRo->Value = Abc_LitNotCond( Gia_ManAppendCi(pNew), !pObjRo->fMark0 );
+    Gia_ManHashStart( pNew );
     for ( i = iFrEnd; i <= pCex->iFrame; i++ )
     {
         Gia_ManForEachPi( p, pObj, k )
             pObj->fMark0 = Abc_InfoHasBit(pCex->pData, iBit++);
         Gia_ManForEachAnd( p, pObj, k )
         {
-            pObj->fMark0 = (Gia_ObjFanin0(pObj)->fMark0 ^ Gia_ObjFaninC0(pObj)) & 
-                           (Gia_ObjFanin1(pObj)->fMark0 ^ Gia_ObjFaninC1(pObj));
+            fCompl0 = Gia_ObjFanin0(pObj)->fMark0 ^ Gia_ObjFaninC0(pObj);
+            fCompl1 = Gia_ObjFanin1(pObj)->fMark0 ^ Gia_ObjFaninC1(pObj);
+            pObj->fMark0 = fCompl0 & fCompl1;
             if ( pObj->fMark0 )
-                pObj->Value = Gia_ManHashAnd( p, Gia_ObjFanin0(pObj)->Value, Gia_ObjFanin1(pObj)->Value );
-            else if ( !Gia_ObjFanin0(pObj)->fMark0 && !Gia_ObjFanin1(pObj)->fMark0 )
-                pObj->Value = Gia_ManHashOr( p, Gia_ObjFanin0(pObj)->Value, Gia_ObjFanin1(pObj)->Value );
-            else if ( !Gia_ObjFanin0(pObj)->fMark0 )
+                pObj->Value = Gia_ManHashAnd( pNew, Gia_ObjFanin0(pObj)->Value, Gia_ObjFanin1(pObj)->Value );
+            else if ( !fCompl0 && !fCompl1 )
+                pObj->Value = Gia_ManHashOr( pNew, Gia_ObjFanin0(pObj)->Value, Gia_ObjFanin1(pObj)->Value );
+            else if ( !fCompl0 )
                 pObj->Value = Gia_ObjFanin0(pObj)->Value;
-            else if ( !Gia_ObjFanin1(pObj)->fMark0 )
+            else if ( !fCompl1 )
                 pObj->Value = Gia_ObjFanin1(pObj)->Value;
             else assert( 0 );
+            assert( pObj->Value > 0 );
         }
         Gia_ManForEachCo( p, pObj, k )
         {
             pObj->fMark0 = Gia_ObjFanin0(pObj)->fMark0 ^ Gia_ObjFaninC0(pObj);
             pObj->Value = Gia_ObjFanin0(pObj)->Value;
-        }
+            assert( pObj->Value > 0 );
+        } 
         if ( i == pCex->iFrame )
             break;
         Gia_ManForEachRiRo( p, pObjRi, pObjRo, k )
@@ -127,7 +132,7 @@ Gia_Man_t * Bmc_GiaTargetStates( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, in
             pObjRo->Value = pObjRi->Value;
         }
     }
-    Gia_ManHashStop( p );
+    Gia_ManHashStop( pNew );
     assert( iBit == pCex->nBits );
 
     // create PO
@@ -143,10 +148,40 @@ Gia_Man_t * Bmc_GiaTargetStates( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, in
     // create new initial state
     pNew = Gia_ManDupFlip( pTemp = pNew, Vec_BitArray(vInitNew) );
     Gia_ManStop( pTemp );
+
     Vec_BitFree( vInitNew );
     return pNew;
 }
 
+/**Function*************************************************************
+
+  Synopsis    [Generate AIG for target bad states.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Aig_Man_t * Bmc_AigTargetStates( Aig_Man_t * p, Abc_Cex_t * pCex, int iFrBeg, int iFrEnd, int fVerbose )
+{
+    Aig_Man_t * pAig;
+    Gia_Man_t * pGia, * pRes;
+    pGia = Gia_ManFromAigSimple( p );
+    if ( !Gia_ManVerifyCex( pGia, pCex, 0 ) )
+    {
+        Abc_Print( 1, "Current CEX does not fail AIG \"%s\".\n", p->pName );
+        Gia_ManStop( pGia );
+        return NULL;
+    }
+    pRes = Bmc_GiaTargetStates( pGia, pCex, iFrBeg, iFrEnd, fVerbose );
+    pAig = Gia_ManToAigSimple( pRes );
+    Gia_ManStop( pGia );
+    Gia_ManStop( pRes );
+    return pAig;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////