From 7d1c5cbef46f316d044a73ad11fac8a64c864f2c Mon Sep 17 00:00:00 2001
From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Mon, 12 Jul 2021 14:18:17 -0500
Subject: Fix for learned rewrite pass, add regression (#6850)

Fixes #4791.
---
 src/preprocessing/passes/learned_rewrite.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/preprocessing')

diff --git a/src/preprocessing/passes/learned_rewrite.cpp b/src/preprocessing/passes/learned_rewrite.cpp
index fd3cf832b..81fbf1ea1 100644
--- a/src/preprocessing/passes/learned_rewrite.cpp
+++ b/src/preprocessing/passes/learned_rewrite.cpp
@@ -293,7 +293,7 @@ Node LearnedRewrite::rewriteLearned(Node n,
         || (!db.upper_value.isNull()
             && db.upper_value.getConst<Rational>().sgn() == -1))
     {
-      Rational bden = db.lower_value.isNull()
+      Rational bden = db.upper_value.isNull()
                           ? db.lower_value.getConst<Rational>()
                           : db.upper_value.getConst<Rational>().abs();
       // if 0 <= UB(num) < LB(den) or 0 <= UB(num) < -UB(den)
-- 
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