Some fixes to symmetry breaker (resolves bug 576).

1 files changed, 27 insertions, 0 deletions

diff --git a/test/regress/regress0/bug576.smt2 b/test/regress/regress0/bug576.smt2
new file mode 100644
index 000000000..c9ca241d7
--- /dev/null
+++ b/test/regress/regress0/bug576.smt2
@@ -0,0 +1,27 @@
+(set-logic QF_UF)
+(set-info :status sat)
+(declare-sort var 0)
+(declare-sort reg 0)
+(declare-fun var5_1 () var)
+(declare-fun b_1 () var)
+(declare-fun a_1 () var)
+(declare-fun r0 () reg)
+(declare-fun r1 () reg)
+(declare-fun r2 () reg)
+(declare-fun r3 () reg)
+(assert (not (= r0 r1)))
+(assert (not (= r0 r2)))
+(assert (not (= r0 r3)))
+(assert (not (= r1 r2)))
+(assert (not (= r1 r3)))
+(assert (not (= r2 r3)))
+(declare-fun assign (var) reg)
+(assert (or (= (assign var5_1) r0) (= (assign var5_1) r1) (= (assign var5_1) r2) (= (assign var5_1) r3) ))
+(assert (or (= (assign b_1) r1) ))
+(assert (or (= (assign a_1) r0) ))
+(assert (not (= (assign b_1) (assign a_1))))
+(assert (= (assign var5_1) r0))
+(assert (= (assign b_1) r1))
+(assert (= (assign a_1) r0))
+(check-sat)
+(exit)