Guard setInitialStates with hasInitialStatesRestriction

src/storm/storage/jani/Automaton.cpp

@@ -445,7 +445,9 @@ namespace storm {
                 location.substitute(substitution);
             }
 
-            this->setInitialStatesRestriction(substituteJaniExpression(this->getInitialStatesRestriction(), substitution));
+            if (hasInitialStatesRestriction()) {
+                this->setInitialStatesRestriction(substituteJaniExpression(this->getInitialStatesRestriction(), substitution));
+            }
 
             edges.substitute(substitution);
         }