Merge pull request #892 from diffblue/range_type7

SMV: two tests for range types

Author: kroening

regression/ebmc/range_type/range_type7.desc

@@ -0,0 +1,8 @@
+CORE broken-smt-backend
+range_type7.smv
+--bound 5
+^\[spec1\] G x != 1: REFUTED$
+^EXIT=10$
+^SIGNAL=0$
+--
+--

regression/ebmc/range_type/range_type7.smv

@@ -0,0 +1,14 @@
+MODULE main
+VAR x:1..6;
+
+ASSIGN
+  init(x) := 6;
+
+  next(x) :=
+    case
+      x!=1 : x - 1;
+      TRUE: 1;
+    esac;
+
+-- should fail
+LTLSPEC G x!=1

regression/ebmc/range_type/range_type8.desc

@@ -0,0 +1,9 @@
+KNOWNBUG broken-smt-backend
+range_type8.smv
+--bound 5
+^\[spec1\] G x != 1: REFUTED$
+^EXIT=10$
+^SIGNAL=0$
+--
+--
+We do not have type checking for unary minus.

regression/ebmc/range_type/range_type8.smv

@@ -0,0 +1,14 @@
+MODULE main
+VAR x:1..6;
+
+ASSIGN
+  init(x) := 6;
+
+  next(x) :=
+    case
+      x!=1 : x + -1; -- unary minus
+      TRUE: 1;
+    esac;
+
+-- should fail
+LTLSPEC G x!=1