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-rw-r--r--src/opt/sbd/sbdCore.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/opt/sbd/sbdCore.c b/src/opt/sbd/sbdCore.c
index 251a4deb..a36b4bd2 100644
--- a/src/opt/sbd/sbdCore.c
+++ b/src/opt/sbd/sbdCore.c
@@ -1883,7 +1883,7 @@ int Sbd_ManImplement2( Sbd_Man_t * p, int Pivot, int nStrs, Sbd_Str_t * pStrs )
}
// make sure delay reduction is achieved
iNewLev = Vec_IntEntry( p->vLutLevs, Abc_Lit2Var(iLit) );
- assert( iNewLev < iCurLev );
+ assert( !iNewLev || iNewLev < iCurLev );
// update delay of the initial node
assert( Vec_IntEntry(p->vLutLevs, Pivot) == iCurLev );
Vec_IntWriteEntry( p->vLutLevs, Pivot, iNewLev );