4 files changed, 27 insertions, 1 deletions
diff --git a/test/regress/regress0/model-core.smt2 b/test/regress/regress0/model-core.smt2
index 6729cb5e0..fca80a960 100644
--- a/test/regress/regress0/model-core.smt2
+++ b/test/regress/regress0/model-core.smt2
@@ -1,4 +1,5 @@
-; COMMAND-LINE: --produce-model-cores
+; COMMAND-LINE: --produce-models --model-cores=simple
+; COMMAND-LINE: --produce-models --model-core=non-implied
 ; EXPECT: sat
 (set-logic QF_UFLIA)
 (declare-fun x () Int)
diff --git a/test/regress/regress0/options/invalid_dump.smt2 b/test/regress/regress0/options/invalid_dump.smt2
new file mode 100644
index 000000000..ab6f6db31
--- /dev/null
+++ b/test/regress/regress0/options/invalid_dump.smt2
@@ -0,0 +1,5 @@
+; REQUIRES: dumping
+; COMMAND-LINE: --dump invalidDumpTag
+; ERROR-SCRUBBER: grep -o "unknown option for --dump"
+; EXPECT-ERROR: unknown option for --dump
+; EXIT: 1
diff --git a/test/regress/regress0/smtlib/reason-unknown.smt2 b/test/regress/regress0/smtlib/reason-unknown.smt2
new file mode 100644
index 000000000..a4eecf220
--- /dev/null
+++ b/test/regress/regress0/smtlib/reason-unknown.smt2
@@ -0,0 +1,5 @@
+; EXPECT: (error "Can't get-info :reason-unknown when the last result wasn't unknown!")
+; EXPECT: sat
+(set-logic QF_SAT)
+(get-info :reason-unknown)
+(check-sat)
diff --git a/test/regress/regress0/strings/ncontrib-rewrites.smt2 b/test/regress/regress0/strings/ncontrib-rewrites.smt2
new file mode 100644
index 000000000..6b2e68794
--- /dev/null
+++ b/test/regress/regress0/strings/ncontrib-rewrites.smt2
@@ -0,0 +1,15 @@
+(set-logic ALL)
+(set-info :status unsat)
+(declare-fun x () String)
+(declare-fun y () String)
+(declare-fun z () String)
+
+(assert (or
+
+(not (= (str.replace (str.++ x x) "A" "B") (str.replace x "" (str.replace x "A" "B"))))
+
+(not (= (str.replace (str.++ x y "B" x y) "A" z) (str.++ (str.replace (str.++ x y) "A" z) "B" x y)))
+
+))
+
+(check-sat)