Intermediate commit.

Former-commit-id: d3c8fe1b9b

src/adapters/ExplicitModelAdapter.h

@@ -116,7 +116,7 @@ namespace storm {
                 // all expressions in the program so we can then evaluate them without having to store the values of the
                 // constants in the state (i.e., valuation).
                 preparedProgram = preparedProgram.substituteConstants();
-                storm::prism::RewardModel const& rewardModel = rewardModelName != "" ? preparedProgram.getRewardModel(rewardModelName) : storm::prism::RewardModel();
+                storm::prism::RewardModel const& rewardModel = rewardModelName != "" || preparedProgram.hasRewardModel(rewardModelName) ? preparedProgram.getRewardModel(rewardModelName) : storm::prism::RewardModel();
                 
                 ModelComponents modelComponents = buildModelComponents(preparedProgram, rewardModel);
                 

src/storage/prism/Program.cpp

@@ -149,6 +149,11 @@ namespace storm {
             return !this->rewardModels.empty();
         }
         
+        bool Program::hasRewardModel(std::string const& name) const {
+            auto const& nameIndexPair = this->rewardModelToIndexMap.find(name);
+            return nameIndexPair != this->rewardModelToIndexMap.end();
+        }
+        
         std::vector<storm::prism::RewardModel> const& Program::getRewardModels() const {
             return this->rewardModels;
         }

src/storage/prism/Program.h

@@ -226,6 +226,14 @@ namespace storm {
              */
             bool hasRewardModel() const;
             
+            /*!
+             * Retrieves whether the program has a reward model with the given name.
+             *
+             * @param name The name of the reward model to look for.
+             * @return True iff the program has a reward model with the given name.
+             */
+            bool hasRewardModel(std::string const& name) const;
+            
             /*!
              * Retrieves the reward models of the program.
              *