From 161c83795fe697ecbb47c6849e478cc6dc169472 Mon Sep 17 00:00:00 2001
From: Nikolaj Bjorner <nbjorner@microsoft.com>
Date: Tue, 15 Jan 2019 08:34:55 -0800
Subject: [PATCH] remember inconsistent states when cloning

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
---
 src/sat/sat_solver.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/sat/sat_solver.cpp b/src/sat/sat_solver.cpp
index 66655e2aa..f6a8698f4 100644
--- a/src/sat/sat_solver.cpp
+++ b/src/sat/sat_solver.cpp
@@ -120,6 +120,11 @@ namespace sat {
         m_qhead = 0;
         m_trail.reset();
         m_scopes.reset();
+
+        if (src.inconsistent()) {
+            set_conflict(justification());
+            return;
+        }
         
         // create new vars
         for (bool_var v = num_vars(); v < src.num_vars(); v++) {