Support for POR (priority or)

Former-commit-id: f0e782bcb1

src/parser/DFTGalileoParser.cpp

@@ -100,6 +100,8 @@ namespace storm {
                         success = builder.addVotElement(name, threshold, childNames);
                     } else if (tokens[1] == "pand") {
                         success = builder.addPandElement(name, childNames);
+                    } else if (tokens[1] == "por") {
+                        success = builder.addPorElement(name, childNames);
                     } else if (tokens[1] == "wsp" || tokens[1] == "csp") {
                         success = builder.addSpareElement(name, childNames);
                     } else if (tokens[1] == "seq") {

src/storage/dft/elements/DFTPor.h

@@ -11,11 +11,27 @@ namespace storm {
             {}
 
             void checkFails(storm::storage::DFTState<ValueType>& state, DFTStateSpaceGenerationQueues<ValueType>& queues) const override {
-                 assert(false);
+                 if(state.isOperational(this->mId)) {
+                    if (state.hasFailed(this->mChildren.front()->id())) {
+                        // First child has failed before others
+                        this->fail(state, queues);
+                    } else {
+                        for (size_t i = 1; i < this->nrChildren(); ++i) {
+                            if (state.hasFailed(this->mChildren[i]->id())) {
+                                // Child has failed before first child
+                                this->failsafe(state, queues);
+                                this->childrenDontCare(state, queues);
+                            }
+                        }
+                    }
+                }
             }
 
             void checkFailsafe(storm::storage::DFTState<ValueType>& state, DFTStateSpaceGenerationQueues<ValueType>& queues) const override {
-                assert(false);
+                if (state.isFailsafe(this->mChildren.front()->id())) {
+                    this->failsafe(state, queues);
+                    this->childrenDontCare(state, queues);
+                }
             }
 
             virtual DFTElementType type() const override {