Fixed possible infinite recursion

Former-commit-id: 5fdbae4203

src/logic/BinaryStateFormula.cpp

@@ -43,7 +43,7 @@ namespace storm {
         }
         
         bool BinaryStateFormula::containsNestedRewardOperators() const {
-            return this->containsNestedRewardOperators() || this->getRightSubformula().containsNestedRewardOperators();
+            return this->getLeftSubformula().containsNestedRewardOperators() || this->getRightSubformula().containsNestedRewardOperators();
         }
         
         Formula const& BinaryStateFormula::getLeftSubformula() const {
@@ -69,4 +69,4 @@ namespace storm {
             this->getRightSubformula().gatherReferencedRewardModels(referencedRewardModels);
         }
     }
-}
+}