From 075e3d97974c89dcbd4cf6c7a1c3b37cbb27403d Mon Sep 17 00:00:00 2001
From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Thu, 13 Dec 2018 20:17:50 -0600
Subject:  Fix extended rewriter for binary associative operators. (#2751)

This was causing assertion failures when using Sets + Sygus.
---
 test/regress/CMakeLists.txt               |  1 +
 test/regress/regress0/sets/sets-extr.smt2 | 15 +++++++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 test/regress/regress0/sets/sets-extr.smt2

(limited to 'test')

diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt
index 9e942aae1..95e4b8875 100644
--- a/test/regress/CMakeLists.txt
+++ b/test/regress/CMakeLists.txt
@@ -776,6 +776,7 @@ set(regress_0_tests
   regress0/sets/pre-proc-univ.smt2
   regress0/sets/rec_copy_loop_check_heap_access_43_4.smt2
   regress0/sets/sets-equal.smt2
+  regress0/sets/sets-extr.smt2
   regress0/sets/sets-inter.smt2
   regress0/sets/sets-of-sets-subtypes.smt2
   regress0/sets/sets-poly-int-real.smt2
diff --git a/test/regress/regress0/sets/sets-extr.smt2 b/test/regress/regress0/sets/sets-extr.smt2
new file mode 100644
index 000000000..c497ff189
--- /dev/null
+++ b/test/regress/regress0/sets/sets-extr.smt2
@@ -0,0 +1,15 @@
+; COMMAND-LINE: --ext-rew-prep --ext-rew-prep-agg
+; EXPECT: sat
+(set-logic ALL)
+(declare-sort Atom 0)
+
+(declare-fun a () Atom)
+(declare-fun b () Atom)
+(declare-fun c () Atom)
+(declare-fun S () (Set Atom))
+
+
+(assert (= S (union (singleton a) (union (singleton c) (singleton b)))))
+
+(check-sat)
+
-- 
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