add derived operators to features, fixed composition export

Former-commit-id: 4d57e83fdf [formerly f392ca2925]
Former-commit-id: 555084f8b0

src/storage/jani/JSONExporter.cpp

@@ -60,11 +60,7 @@ namespace storm {
                 for (auto const& subcomp : composition.getSubcompositions()) {
                     modernjson::json elemDecl;
                     if (subcomp->isAutomaton()) {
-                        modernjson::json autDecl;
-                        autDecl["automaton"] = std::static_pointer_cast<AutomatonComposition>(subcomp)->getAutomatonName();
-                        std::vector<modernjson::json> elements;
-                        elements.push_back(autDecl);
-                        elemDecl["elements"] = elements;
+                        elemDecl["automaton"] = std::static_pointer_cast<AutomatonComposition>(subcomp)->getAutomatonName();
                     } else {
                         STORM_LOG_THROW(allowRecursion, storm::exceptions::InvalidJaniException, "Nesting composition " << *subcomp << " is not supported by JANI.");
                         elemDecl = boost::any_cast<modernjson::json>(subcomp->accept(*this, boost::none));
@@ -691,10 +687,14 @@ namespace storm {
             jsonStruct["restrict-initial"]["exp"] = buildExpression(janiModel.getInitialStatesRestriction());
             jsonStruct["automata"] = buildAutomataArray(janiModel.getAutomata(), janiModel.getActionIndexToNameMap());
             jsonStruct["system"] = CompositionJsonExporter::translate(janiModel.getSystemComposition());
+            std::vector<std::string> standardFeatureVector = {"derived-operators"};
+            jsonStruct["features"] = standardFeatureVector;
             
         }
         
         
+        
+        
         std::string janiFilterTypeString(storm::modelchecker::FilterType const& ft) {
             switch(ft) {
                 case storm::modelchecker::FilterType::MIN: