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-rw-r--r--test/regress/CMakeLists.txt1
-rw-r--r--test/regress/regress0/strings/issue6643-ctn-decompose-conflict.smt27
2 files changed, 8 insertions, 0 deletions
diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt
index 3adb3ebbb..daa28580a 100644
--- a/test/regress/CMakeLists.txt
+++ b/test/regress/CMakeLists.txt
@@ -1150,6 +1150,7 @@ set(regress_0_tests
regress0/strings/issue6520.smt2
regress0/strings/issue6560-indexof-reduction.smt2
regress0/strings/issue6604-re-elim.smt2
+ regress0/strings/issue6643-ctn-decompose-conflict.smt2
regress0/strings/itos-entail.smt2
regress0/strings/large-model.smt2
regress0/strings/leadingzero001.smt2
diff --git a/test/regress/regress0/strings/issue6643-ctn-decompose-conflict.smt2 b/test/regress/regress0/strings/issue6643-ctn-decompose-conflict.smt2
new file mode 100644
index 000000000..41a515640
--- /dev/null
+++ b/test/regress/regress0/strings/issue6643-ctn-decompose-conflict.smt2
@@ -0,0 +1,7 @@
+; COMMAND-LINE: --strings-exp
+(set-logic QF_SLIA)
+(declare-fun y () String)
+(declare-fun z () String)
+(assert (not (= (str.contains y (str.replace "A" "" z)) (str.contains y "A"))))
+(set-info :status sat)
+(check-sat)
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