From d18cc5629a59d1e2f41ba883e30cca25b0153a4e Mon Sep 17 00:00:00 2001
From: Nikolaj Bjorner <nbjorner@microsoft.com>
Date: Mon, 26 Jan 2026 10:11:14 -0800
Subject: [PATCH] Update timestamp on variable flip in ddfw

---
 src/ast/sls/sat_ddfw.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ast/sls/sat_ddfw.cpp b/src/ast/sls/sat_ddfw.cpp
index 4d5c948d9..c5faa1c4e 100644
--- a/src/ast/sls/sat_ddfw.cpp
+++ b/src/ast/sls/sat_ddfw.cpp
@@ -270,6 +270,7 @@ namespace sat {
 
     void ddfw::flip(bool_var v) {
         ++m_flips;
+        m_vars[v].m_timestamp = m_flips;
         m_limit.inc();
         literal lit = literal(v, !value(v));
         literal nlit = ~lit;