Bug fix in SOP balancing with structural choices.

src/map/if/ifMap.c

@@ -339,6 +339,8 @@ void If_ObjPerformMappingChoice( If_Man_t * p, If_Obj_t * pObj, int Mode, int fP
             // set the phase attribute
             assert( pCut->fCompl == 0 );
             pCut->fCompl ^= (pObj->fPhase ^ pTemp->fPhase); // why ^= ?
+            if ( p->pPars->fDelayOpt && pCut->fCompl )
+                continue;
             // compute area of the cut (this area may depend on the application specific cost)
             pCut->Area = (Mode == 2)? If_CutAreaDerefed( p, pCut ) : If_CutAreaFlow( p, pCut );
             if ( p->pPars->fEdge )