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-rw-r--r--src/aig/fra/fraCore.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/aig/fra/fraCore.c b/src/aig/fra/fraCore.c
index 444157f0..80799e3e 100644
--- a/src/aig/fra/fraCore.c
+++ b/src/aig/fra/fraCore.c
@@ -369,7 +369,7 @@ Aig_Man_t * Fra_FraigPerform( Aig_Man_t * pManAig, Fra_Par_t * pPars )
Aig_Man_t * pManAigNew;
int clk;
if ( Aig_ManNodeNum(pManAig) == 0 )
- return Aig_ManDup(pManAig, 1);
+ return Aig_ManDupOrdered(pManAig);
clk = clock();
p = Fra_ManStart( pManAig, pPars );
p->pManFraig = Fra_ManPrepareComb( p );