remove constant from model, e.g. for constants that do not appear in the model

src/storm/storage/jani/Model.cpp

@@ -638,6 +638,22 @@ namespace storm {
             return constantToIndex.find(name) != constantToIndex.end();
         }
 
+
+        void Model::removeConstant(std::string const& name) {
+            auto pos = constantToIndex.find(name);
+            if (pos != constantToIndex.end()) {
+                uint64_t index = pos->second;
+                constants.erase(constants.begin() + index);
+                constantToIndex.erase(pos);
+                for (auto& entry : constantToIndex) {
+                    if(entry.second > index) {
+                        entry.second--;
+                    }
+                }
+            }
+
+        }
+        
         Constant const& Model::getConstant(std::string const& name) const {
             auto it = constantToIndex.find(name);
             STORM_LOG_THROW(it != constantToIndex.end(), storm::exceptions::WrongFormatException, "Unable to retrieve unknown constant '" << name << "'.");

src/storm/storage/jani/Model.h

@@ -170,6 +170,11 @@ namespace storm {
              */
             bool hasConstant(std::string const& name) const;
 
+            /*!
+             * Removes (without checks) a constant from the model.
+             */
+            void removeConstant(std::string const& name);
+            
             /*!
              * Retrieves the constants of the model.
              */