3 files changed, 27 insertions, 0 deletions
diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt
index 441327b3a..19513ada3 100644
--- a/test/regress/CMakeLists.txt
+++ b/test/regress/CMakeLists.txt
@@ -1585,6 +1585,7 @@ set(regress_1_tests
   regress1/sygus/icfp_28_10.sy
   regress1/sygus/icfp_easy-ite.sy
   regress1/sygus/inv-example.sy
+  regress1/sygus/inv-missed-sol-true.sy
   regress1/sygus/inv-unused.sy
   regress1/sygus/large-const-simp.sy
   regress1/sygus/let-bug-simp.sy
diff --git a/test/regress/Makefile.tests b/test/regress/Makefile.tests
index 4e9837c36..5bd187e8f 100644
--- a/test/regress/Makefile.tests
+++ b/test/regress/Makefile.tests
@@ -1582,6 +1582,7 @@ REG1_TESTS = \
 	regress1/sygus/icfp_28_10.sy \
 	regress1/sygus/icfp_easy-ite.sy \
 	regress1/sygus/inv-example.sy \
+	regress1/sygus/inv-missed-sol-true.sy \
 	regress1/sygus/inv-unused.sy \
 	regress1/sygus/large-const-simp.sy \
 	regress1/sygus/let-bug-simp.sy \
diff --git a/test/regress/regress1/sygus/inv-missed-sol-true.sy b/test/regress/regress1/sygus/inv-missed-sol-true.sy
new file mode 100644
index 000000000..b04022766
--- /dev/null
+++ b/test/regress/regress1/sygus/inv-missed-sol-true.sy
@@ -0,0 +1,25 @@
+; EXPECT: unsat
+; COMMAND-LINE: --sygus-out=status
+(set-logic LIA)
+
+(synth-inv inv-f ((x Int) (z Int)))
+
+(declare-primed-var x Int)
+(declare-primed-var z Int)
+
+(define-fun pre-f ((x Int) (z Int)) Bool
+  (and (> x (- 0 100)) (< x 200)
+       (> z 100) (< z 200)))
+
+(define-fun trans-f ((x Int) (z Int) (x! Int) (z! Int)) Bool
+  (and (< x 100) (> z 100)
+       (or (and (= x! (+ x 1)) (= z! z))
+           (and (= x! (- x 1)) (= z! (- z 1))))))
+
+(define-fun post-f ((x Int) (z Int)) Bool
+  (or (and (< x 100) (> z 100))
+      (or (>= x 100) (<= z 100))))
+
+(inv-constraint inv-f pre-f trans-f post-f)
+
+(check-synth)
+\ No newline at end of file