From 11d5b508be5c7e2ee3d81fcd656f9784b9119d35 Mon Sep 17 00:00:00 2001
From: Nikolaj Bjorner <nbjorner@microsoft.com>
Date: Wed, 12 Aug 2020 10:14:39 -0700
Subject: [PATCH] fix #4625

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
---
 src/smt/theory_str_regex.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/smt/theory_str_regex.cpp b/src/smt/theory_str_regex.cpp
index 1b376dfbf3b..fdad98b46ed 100644
--- a/src/smt/theory_str_regex.cpp
+++ b/src/smt/theory_str_regex.cpp
@@ -844,8 +844,6 @@ namespace smt {
             return false;
         } else if (u.re.is_intersection(re)) {
             return false;
-        } else if (u.re.is_complement(re)) {
-            return false;
         } else if (u.re.is_loop(re, sub1, lo, hi) || u.re.is_loop(re, sub1, lo)) {
             return check_regex_length_linearity_helper(sub1, already_star);
         } else {