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-rw-r--r--src/sat/fraig/fraigNode.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/sat/fraig/fraigNode.c b/src/sat/fraig/fraigNode.c
index 84509e9e..6e3d3c7d 100644
--- a/src/sat/fraig/fraigNode.c
+++ b/src/sat/fraig/fraigNode.c
@@ -176,6 +176,7 @@ Fraig_Node_t * Fraig_NodeCreate( Fraig_Man_t * p, Fraig_Node_t * p1, Fraig_Node_
// compute the level of this node
pNode->Level = 1 + FRAIG_MAX(Fraig_Regular(p1)->Level, Fraig_Regular(p2)->Level);
pNode->fInv = Fraig_NodeIsSimComplement(p1) & Fraig_NodeIsSimComplement(p2);
+ pNode->fFailTfo = Fraig_Regular(p1)->fFailTfo | Fraig_Regular(p2)->fFailTfo;
// derive the simulation info
clk = clock();