From dcc4d6e90be3ad349eb6497adf6dbe2781e8bd57 Mon Sep 17 00:00:00 2001
From: Jannis Harder <me@jix.one>
Date: Fri, 9 Jun 2023 15:21:22 +0200
Subject: [PATCH] yosys-witness: Don't treat aiw x-bits as don't change

While treating initialization only bits as don't change during later
cycles is correct, actual x-bits should be kept as x-bits.
---
 backends/smt2/witness.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backends/smt2/witness.py b/backends/smt2/witness.py
index 8d0cc8112..7d5a2469e 100644
--- a/backends/smt2/witness.py
+++ b/backends/smt2/witness.py
@@ -194,7 +194,7 @@ def aiw2yw(input, mapfile, output):
 
         values = WitnessValues()
         for i, v in enumerate(inline):
-            if v == "x" or outyw.t > 0 and i in aiger_map.init_inputs:
+            if outyw.t > 0 and i in aiger_map.init_inputs:
                 continue
 
             try: