diff --git a/lib/Analysis/SimpleConstraintManager.cpp b/lib/Analysis/SimpleConstraintManager.cpp
index a4d59be..e6f940e 100644
--- a/lib/Analysis/SimpleConstraintManager.cpp
+++ b/lib/Analysis/SimpleConstraintManager.cpp
@@ -29,6 +29,17 @@
       case BinaryOperator::Or:
       case BinaryOperator::Xor:
         return false;
+        // We don't reason yet about arithmetic constraints on symbolic values.
+      case BinaryOperator::Mul:
+      case BinaryOperator::Div:
+      case BinaryOperator::Rem:
+      case BinaryOperator::Add:
+      case BinaryOperator::Sub:
+      case BinaryOperator::Shl:
+      case BinaryOperator::Shr:
+        return false;
+
+        // All other cases.
       default:
         return true;
     }