diff --git a/src/aig/gia/giaMini.c b/src/aig/gia/giaMini.c
index 6ba85706d..c0473fea3 100644
--- a/src/aig/gia/giaMini.c
+++ b/src/aig/gia/giaMini.c
@@ -813,6 +813,13 @@ int * Abc_FrameReadMiniAigEquivClasses( Abc_Frame_t * pAbc )
         printf( "Equivalence classes of internal GIA are not available.\n" );
         return NULL;
     }
+    else if ( 0 )
+    {
+        int i;
+        for ( i = 1; i < Gia_ManObjNum(pAbc->pGia2); i++ )
+            if ( Gia_ObjHasRepr(pAbc->pGia2, i) )
+                printf( "Obj %3d : Repr %3d   Proved %d   Failed %d\n", i, Gia_ObjRepr(pAbc->pGia2, i), Gia_ObjProved(pAbc->pGia2, i), Gia_ObjFailed(pAbc->pGia2, i) );
+    }
     if ( Gia_ManObjNum(pAbc->pGia2) != Gia_ManObjNum(pAbc->pGiaMiniAig) )
         printf( "Internal GIA with equivalence classes is not directly derived from MiniAig.\n" );
     // derive the set of equivalent node pairs
diff --git a/src/proof/cec/cecSatG2.c b/src/proof/cec/cecSatG2.c
index 00673c165..462064399 100644
--- a/src/proof/cec/cecSatG2.c
+++ b/src/proof/cec/cecSatG2.c
@@ -1731,7 +1731,21 @@ Gia_Obj_t * Cec4_ManFindRepr( Gia_Man_t * p, Cec4_Man_t * pMan, int iObj )
 }
 void Gia_ManRemoveWrongChoices( Gia_Man_t * p )
 {
-    int i, iObj, iPrev, Counter = 0;
+    int i = 0, iObj, iPrev, Counter = 0;
+    for ( iPrev = i, iObj = Gia_ObjNext(p, i); -1 < iObj; iObj = Gia_ObjNext(p, iPrev) )
+    {
+        Gia_Obj_t * pRepr = Gia_ObjReprObj(p, iObj);
+        assert( pRepr = Gia_ManConst0(p) );
+        if( !Gia_ObjFailed(p,iObj) && Abc_Lit2Var(Gia_ManObj(p,iObj)->Value) == Abc_Lit2Var(pRepr->Value) )
+        {
+            iPrev = iObj;
+            continue;
+        }
+        Gia_ObjSetRepr( p, iObj, GIA_VOID );
+        Gia_ObjSetNext( p, iPrev, Gia_ObjNext(p, iObj) );
+        Gia_ObjSetNext( p, iObj, 0 );
+        Counter++;
+    }
     Gia_ManForEachClass( p, i )
     {
         for ( iPrev = i, iObj = Gia_ObjNext(p, i); -1 < iObj; iObj = Gia_ObjNext(p, iPrev) )