Several fixes and additions to IR. Modifications to CMakeLists.txt of log4cplus to enable proper compilation under Mac OS. Fixes to coin2.nm. Added global variables to grammar and IR. Established basis for defining undefined constants of the model. Started to write MinimalLabelSetGenerator.

Former-commit-id: b65bb063fa

examples/mdp/consensus/coin2.nm

@@ -29,18 +29,18 @@ module process1
 	// flip coin
 	[] (pc1=0)  -> 0.5 : (coin1'=0) & (pc1'=1) + 0.5 : (coin1'=1) & (pc1'=1);
 	// write tails -1  (reset coin to add regularity)
-	[] (pc1=1) & (coin1=0) & (counter>0) -> (counter'=counter-1) & (pc1'=2) & (coin1'=0);
+	[] (pc1=1) & (coin1=0) & (counter>0) -> 1 : (counter'=counter-1) & (pc1'=2) & (coin1'=0);
 	// write heads +1 (reset coin to add regularity)
-	[] (pc1=1) & (coin1=1) & (counter<range) -> (counter'=counter+1) & (pc1'=2) & (coin1'=0);
+	[] (pc1=1) & (coin1=1) & (counter<range) -> 1 : (counter'=counter+1) & (pc1'=2) & (coin1'=0);
 	// check
 	// decide tails
-	[] (pc1=2) & (counter<=left) -> (pc1'=3) & (coin1'=0);
+	[] (pc1=2) & (counter<=left) -> 1 : (pc1'=3) & (coin1'=0);
 	// decide heads
-	[] (pc1=2) & (counter>=right) -> (pc1'=3) & (coin1'=1);
+	[] (pc1=2) & (counter>=right) -> 1 : (pc1'=3) & (coin1'=1);
 	// flip again
-	[] (pc1=2) & (counter>left) & (counter<right) -> (pc1'=0);
+	[] (pc1=2) & (counter>left) & (counter<right) -> 1 : (pc1'=0);
 	// loop (all loop together when done)
-	[done] (pc1=3) -> (pc1'=3);
+	[done] (pc1=3) -> 1 : (pc1'=3);
 
 endmodule
 

resources/3rdparty/log4cplus-1.1.2-rc2/CMakeLists.txt

@@ -33,9 +33,17 @@ endif (WIN32)
 
 if (MSVC)
   set (LOG4CPLUS_WORKING_LOCALE_DEFAULT ON)
-else (MSVC)
+elseif(CMAKE_COMPILER_IS_GNUCC)
   set (CMAKE_CXX_FLAGS "-std=c++11")
   set (LOG4CPLUS_WORKING_LOCALE_DEFAULT OFF)
+else(CLANG)
+	set (CLANG ON)
+    if(UNIX AND NOT APPLE)
+      set(CLANG_STDLIB libstdc++)
+    else()
+      set(CLANG_STDLIB libc++)
+    endif()
+    set (CMAKE_CXX_FLAGS "-std=c++11 -stdlib=${CLANG_STDLIB}")
 endif (MSVC)
 
 option(LOG4CPLUS_WORKING_LOCALE "Define for compilers/standard libraries that support more than just the C locale."

src/adapters/ExplicitModelAdapter.cpp

@@ -15,6 +15,8 @@
 #include "src/models/Mdp.h"
 #include "src/models/Ctmdp.h"
 
+#include <boost/algorithm/string.hpp>
+
 #include <sstream>
 
 #include "log4cplus/logger.h"
@@ -37,7 +39,60 @@ namespace storm {
             this->clearInternalState();
         }
         
-        std::shared_ptr<storm::models::AbstractModel<double>> ExplicitModelAdapter::getModel(std::string const& rewardModelName) {
+        std::shared_ptr<storm::models::AbstractModel<double>> ExplicitModelAdapter::getModel(std::string const& constantDefinitionString, std::string const& rewardModelName) {
+            // Parse the string that defines the undefined constants of the model and make sure that it contains exactly
+            // one value for each undefined constant of the model.
+            std::vector<std::string> definitions;
+            boost::split(definitions, constantDefinitionString, boost::is_any_of(","));
+            for (auto& definition : definitions) {
+                boost::trim(definition);
+                
+                // Check whether the token could be a legal constant definition.
+                uint_fast64_t positionOfAssignmentOperator = definition.find('=');
+                if (positionOfAssignmentOperator == std::string::npos) {
+                    throw storm::exceptions::InvalidArgumentException() << "Illegal constant definition string: syntax error.";
+                }
+
+                // Now extract the variable name and the value from the string.
+                std::string constantName = definition.substr(0, positionOfAssignmentOperator);
+                boost::trim(constantName);
+                std::string value = definition.substr(positionOfAssignmentOperator + 1);
+                boost::trim(value);
+                
+                // Check whether the constant is a legal undefined constant of the program and if so, of what type it is.
+                if (program.hasUndefinedBooleanConstant(constantName)) {
+                    if (value == "true") {
+                        program.getUndefinedBooleanConstantExpression(constantName)->define(true);
+                    } else if (value == "false") {
+                        program.getUndefinedBooleanConstantExpression(constantName)->define(false);
+                    } else {
+                        throw storm::exceptions::InvalidArgumentException() << "Illegal value for boolean constant: " << value << ".";
+                    }
+                } else if (program.hasUndefinedIntegerConstant(constantName)) {
+                    try {
+                        int_fast64_t integerValue = std::stoi(value);
+                        program.getUndefinedIntegerConstantExpression(constantName)->define(integerValue);
+                    } catch (std::invalid_argument const& e) {
+                        throw storm::exceptions::InvalidArgumentException() << "Illegal value of integer constant: " << value << ".";
+                    } catch (std::out_of_range const& e) {
+                        throw storm::exceptions::InvalidArgumentException() << "Illegal value of integer constant: " << value << " (value too big).";
+                    }
+                } else if (program.hasUndefinedDoubleConstant(constantName)) {
+                    try {
+                        double doubleValue = std::stod(value);
+                        program.getUndefinedDoubleConstantExpression(constantName)->define(doubleValue);
+                    } catch (std::invalid_argument const& e) {
+                        throw storm::exceptions::InvalidArgumentException() << "Illegal value of double constant: " << value << ".";
+                    } catch (std::out_of_range const& e) {
+                        throw storm::exceptions::InvalidArgumentException() << "Illegal value of double constant: " << value << " (value too big).";
+                    }
+
+                } else {
+                    throw storm::exceptions::InvalidArgumentException() << "Illegal constant definition string: unknown undefined constant " << constantName << ".";
+                }
+                
+            }
+            
             // Initialize reward model.
             this->rewardModel = nullptr;
             if (rewardModelName != "") {
@@ -149,15 +204,27 @@ namespace storm {
             uint_fast64_t numberOfBooleanVariables = 0;
             
             // Count number of variables.
+            numberOfBooleanVariables += program.getNumberOfGlobalBooleanVariables();
+            numberOfIntegerVariables += program.getNumberOfGlobalIntegerVariables();
             for (uint_fast64_t i = 0; i < program.getNumberOfModules(); ++i) {
-                numberOfIntegerVariables += program.getModule(i).getNumberOfIntegerVariables();
                 numberOfBooleanVariables += program.getModule(i).getNumberOfBooleanVariables();
+                numberOfIntegerVariables += program.getModule(i).getNumberOfIntegerVariables();
             }
             
             this->booleanVariables.resize(numberOfBooleanVariables);
             this->integerVariables.resize(numberOfIntegerVariables);
             
             // Create variables.
+            for (uint_fast64_t i = 0; i < program.getNumberOfGlobalBooleanVariables(); ++i) {
+                storm::ir::BooleanVariable var = program.getGlobalBooleanVariable(i);
+                this->booleanVariables[var.getGlobalIndex()] = var;
+                this->booleanVariableToIndexMap[var.getName()] = var.getGlobalIndex();
+            }
+            for (uint_fast64_t i = 0; i < program.getNumberOfGlobalIntegerVariables(); ++i) {
+                storm::ir::IntegerVariable var = program.getGlobalIntegerVariable(i);
+                this->integerVariables[var.getGlobalIndex()] = var;
+                this->integerVariableToIndexMap[var.getName()] = var.getGlobalIndex();
+            }
             for (uint_fast64_t i = 0; i < program.getNumberOfModules(); ++i) {
                 storm::ir::Module const& module = program.getModule(i);
                 

src/adapters/ExplicitModelAdapter.h

@@ -75,12 +75,14 @@ namespace storm {
              * Convert the program given at construction time to an abstract model. The type of the model is the one
              * specified in the program. The given reward model name selects the rewards that the model will contain.
              *
+             * @param constantDefinitionString A string that contains a comma-separated definition of all undefined
+             * constants in the model.
              * @param rewardModelName The name of reward model to be added to the model. This must be either a reward
              * model of the program or the empty string. In the latter case, the constructed model will contain no 
              * rewards.
              * @return The explicit model that was given by the probabilistic program.
              */
-            std::shared_ptr<storm::models::AbstractModel<double>> getModel(std::string const& rewardModelName = "");
+            std::shared_ptr<storm::models::AbstractModel<double>> getModel(std::string const& constantDefinitionString = "", std::string const& rewardModelName = "");
             
         private:
             // Copying/Moving is disabled for this class

src/counterexamples/MinimalLabelSetGenerator.h

@@ -14,8 +14,7 @@
 
 #include "src/models/Mdp.h"
 #include "src/exceptions/NotImplementedException.h"
-#include "src/storage/SparseMatrix.h"
-#include "src/storage/BitVector.h"
+#include "src/exceptions/InvalidArgumentException.h"
 
 namespace storm {
     namespace counterexamples {
@@ -27,10 +26,50 @@ namespace storm {
         template <class T>
         class MinimalLabelSetGenerator {
 
+        public:
+            
             static std::unordered_set<uint_fast64_t> getMinimalLabelSet(storm::models::Mdp<T> const& labeledMdp, storm::storage::BitVector const& phiStates, storm::storage::BitVector const& psiStates, T lowerProbabilityBound, bool checkThresholdFeasible = false) {
 #ifdef HAVE_GUROBI
-                // (1) Check whether its possible to exceed the threshold if checkThresholdFeasible is set.
-                // (2) Identify relevant labels and states.
+                // (0) Check whether the MDP is indeed labeled.
+                if (!labeledMdp.hasChoiceLabels()) {
+                    throw storm::exceptions::InvalidArgumentException() << "Minimal label set generation is impossible for unlabeled model.";
+                }
+                
+                // (1) TODO: check whether its possible to exceed the threshold if checkThresholdFeasible is set.
+                
+                // (2) Identify relevant and problematic states.
+                storm::storage::SparseMatrix<bool> backwardTransitions = labeledMdp.getBackwardTransitions();
+                storm::storage::BitVector relevantStates = storm::utility::graph::performProbGreater0A(labeledMdp, backwardTransitions, phiStates, psiStates);
+                relevantStates.complement();
+                storm::storage::BitVector problematicStates = storm::utility::graph::performProbGreater0E(labeledMdp, backwardTransitions, phiStates, psiStates);
+                problematicStates &= relevantStates;
+                
+                // (3) Determine set of relevant labels.
+                std::unordered_set<uint_fast64_t> relevantLabels;
+                storm::storage::SparseMatrix<T> const& transitionMatrix = labeledMdp.getTransitionMatrix();
+                std::vector<uint_fast64_t> const& nondeterministicChoiceIndices = labeledMdp.getNondeterministicChoiceIndices();
+                std::vector<std::list<uint_fast64_t>> const& choiceLabeling = labeledMdp.getChoiceLabeling();
+                // Now traverse all choices of all relevant states and check whether there is a relevant target state.
+                // If so, the associated labels become relevant.
+                for (auto state : relevantStates) {
+                    for (uint_fast64_t row = nondeterministicChoiceIndices[state]; row < nondeterministicChoiceIndices[state - 1]; ++row) {
+                        for (typename storm::storage::SparseMatrix<T>::ConstIndexIterator successorIt = transitionMatrix.constColumnIteratorBegin(row); successorIt != transitionMatrix.constColumnIteratorEnd(row); ++successorIt) {
+                            // If there is a relevant successor, we need to add the labels of the current choice.
+                            if (relevantStates.get(*successorIt)) {
+                                for (auto const& label : choiceLabeling[row]) {
+                                    relevantLabels.insert(label);
+                                }
+                            }
+                        }
+                    }
+                }
+                std::cout << "relevant labels: " << std::endl;
+                for (auto const& label : relevantLabels) {
+                    std::cout << "label: " << label << std::endl;
+                }
+                
+                return relevantLabels;
+                
                 // (3) Encode resulting system as MILP problem.
                 //  (3.1) Initialize MILP solver.
                 //  (3.2) Create variables.

src/ir/Module.h

@@ -51,8 +51,8 @@ namespace storm {
              * @param moduleName The name of the module.
              * @param booleanVariables The boolean variables defined by the module.
              * @param integerVariables The integer variables defined by the module.
-             * @param booleanVariableToLocalIndexMap A mapping of boolean variables to global (i.e. module-local) indices.
-             * @param integerVariableToLocalIndexMap A mapping of integer variables to global (i.e. module-local) indices.
+             * @param booleanVariableToLocalIndexMap A mapping of boolean variables to local (i.e. module-local) indices.
+             * @param integerVariableToLocalIndexMap A mapping of integer variables to local (i.e. module-local) indices.
              * @param commands The commands of the module.
              */
             Module(std::string const& moduleName, std::vector<storm::ir::BooleanVariable> const& booleanVariables,

src/ir/Program.cpp

@@ -23,8 +23,18 @@ namespace storm {
             // Nothing to do here.
         }
         
-        Program::Program(ModelType modelType, std::map<std::string, std::shared_ptr<storm::ir::expressions::BooleanConstantExpression>> booleanUndefinedConstantExpressions, std::map<std::string, std::shared_ptr<storm::ir::expressions::IntegerConstantExpression>> integerUndefinedConstantExpressions, std::map<std::string, std::shared_ptr<storm::ir::expressions::DoubleConstantExpression>> doubleUndefinedConstantExpressions, std::vector<storm::ir::Module> modules, std::map<std::string, storm::ir::RewardModel> rewards, std::map<std::string, std::shared_ptr<storm::ir::expressions::BaseExpression>> labels)
-        : modelType(modelType), booleanUndefinedConstantExpressions(booleanUndefinedConstantExpressions), integerUndefinedConstantExpressions(integerUndefinedConstantExpressions), doubleUndefinedConstantExpressions(doubleUndefinedConstantExpressions), modules(modules), rewards(rewards), labels(labels), actionsToModuleIndexMap(), variableToModuleIndexMap() {
+        Program::Program(ModelType modelType,
+                         std::map<std::string, std::shared_ptr<storm::ir::expressions::BooleanConstantExpression>> const& booleanUndefinedConstantExpressions,
+                         std::map<std::string, std::shared_ptr<storm::ir::expressions::IntegerConstantExpression>> const& integerUndefinedConstantExpressions,
+                         std::map<std::string, std::shared_ptr<storm::ir::expressions::DoubleConstantExpression>> const& doubleUndefinedConstantExpressions,
+                         std::vector<BooleanVariable> const& globalBooleanVariables,
+                         std::vector<IntegerVariable> const& globalIntegerVariables,
+                         std::map<std::string, uint_fast64_t> const& globalBooleanVariableToIndexMap,
+                         std::map<std::string, uint_fast64_t> const& globalIntegerVariableToIndexMap,
+                         std::vector<storm::ir::Module> const& modules,
+                         std::map<std::string, storm::ir::RewardModel> const& rewards,
+                         std::map<std::string, std::shared_ptr<storm::ir::expressions::BaseExpression>> const& labels)
+        : modelType(modelType), booleanUndefinedConstantExpressions(booleanUndefinedConstantExpressions), integerUndefinedConstantExpressions(integerUndefinedConstantExpressions), doubleUndefinedConstantExpressions(doubleUndefinedConstantExpressions), globalBooleanVariables(globalBooleanVariables), globalIntegerVariables(globalIntegerVariables), globalBooleanVariableToIndexMap(globalBooleanVariableToIndexMap), globalIntegerVariableToIndexMap(globalIntegerVariableToIndexMap), modules(modules), rewards(rewards), labels(labels), actionsToModuleIndexMap(), variableToModuleIndexMap() {
             // Now build the mapping from action names to module indices so that the lookup can later be performed quickly.
             for (unsigned int moduleIndex = 0; moduleIndex < this->modules.size(); moduleIndex++) {
                 Module const& module = this->modules[moduleIndex];
@@ -88,6 +98,14 @@ namespace storm {
             return result.str();
         }
         
+        storm::ir::BooleanVariable const& Program::getGlobalBooleanVariable(uint_fast64_t index) const {
+            return this->globalBooleanVariables[index];
+        }
+        
+        storm::ir::IntegerVariable const& Program::getGlobalIntegerVariable(uint_fast64_t index) const {
+            return this->globalIntegerVariables[index];
+        }
+        
         uint_fast64_t Program::getNumberOfModules() const {
             return this->modules.size();
         }
@@ -117,6 +135,14 @@ namespace storm {
             throw storm::exceptions::OutOfRangeException() << "Variable '" << variableName << "' does not exist.";
         }
         
+        uint_fast64_t Program::getNumberOfGlobalBooleanVariables() const {
+            return this->globalBooleanVariables.size();
+        }
+        
+        uint_fast64_t Program::getNumberOfGlobalIntegerVariables() const {
+            return this->globalIntegerVariables.size();
+        }
+        
         storm::ir::RewardModel const& Program::getRewardModel(std::string const& name) const {
             auto nameRewardModelPair = this->rewards.find(name);
             if (nameRewardModelPair == this->rewards.end()) {
@@ -130,5 +156,44 @@ namespace storm {
             return this->labels;
         }
         
+        bool Program::hasUndefinedBooleanConstant(std::string const& constantName) const {
+            return this->booleanUndefinedConstantExpressions.find(constantName) != this->booleanUndefinedConstantExpressions.end();
+        }
+        
+        std::shared_ptr<storm::ir::expressions::BooleanConstantExpression> Program::getUndefinedBooleanConstantExpression(std::string const& constantName) const {
+            auto constantExpressionPair = this->booleanUndefinedConstantExpressions.find(constantName);
+            if (constantExpressionPair != this->booleanUndefinedConstantExpressions.end()) {
+                return constantExpressionPair->second;
+            } else {
+                throw storm::exceptions::InvalidArgumentException() << "Unknown undefined boolean constant " << constantName << ".";
+            }
+        }
+        
+        bool Program::hasUndefinedIntegerConstant(std::string const& constantName) const {
+            return this->integerUndefinedConstantExpressions.find(constantName) != this->integerUndefinedConstantExpressions.end();
+        }
+        
+        std::shared_ptr<storm::ir::expressions::IntegerConstantExpression> Program::getUndefinedIntegerConstantExpression(std::string const& constantName) const {
+            auto constantExpressionPair = this->integerUndefinedConstantExpressions.find(constantName);
+            if (constantExpressionPair != this->integerUndefinedConstantExpressions.end()) {
+                return constantExpressionPair->second;
+            } else {
+                throw storm::exceptions::InvalidArgumentException() << "Unknown undefined integer constant " << constantName << ".";
+            }
+        }
+        
+        bool Program::hasUndefinedDoubleConstant(std::string const& constantName) const {
+            return this->doubleUndefinedConstantExpressions.find(constantName) != this->doubleUndefinedConstantExpressions.end();
+        }
+        
+        std::shared_ptr<storm::ir::expressions::DoubleConstantExpression> Program::getUndefinedDoubleConstantExpression(std::string const& constantName) const {
+            auto constantExpressionPair = this->doubleUndefinedConstantExpressions.find(constantName);
+            if (constantExpressionPair != this->doubleUndefinedConstantExpressions.end()) {
+                return constantExpressionPair->second;
+            } else {
+                throw storm::exceptions::InvalidArgumentException() << "Unknown undefined double constant " << constantName << ".";
+            }
+        }
+        
     } // namespace ir
 } // namepsace storm

src/ir/Program.h

@@ -49,17 +49,27 @@ namespace storm {
              * expression nodes.
              * @param doubleUndefinedConstantExpressions A map of undefined double constants to their
              * expression nodes.
+             * @param globalBooleanVariables A list of global boolean variables.
+             * @param globalIntegerVariables A list of global integer variables.
+             * @param globalBooleanVariableToIndexMap A mapping from global boolean variable names to the index in the
+             * list of global boolean variables.
+             * @param globalIntegerVariableToIndexMap A mapping from global integer variable names to the index in the
+             * list of global integer variables.
              * @param modules The modules of the program.
              * @param rewards The reward models of the program.
              * @param labels The labels defined for this model.
              */
             Program(ModelType modelType,
-                    std::map<std::string, std::shared_ptr<storm::ir::expressions::BooleanConstantExpression>> booleanUndefinedConstantExpressions,
-                    std::map<std::string, std::shared_ptr<storm::ir::expressions::IntegerConstantExpression>> integerUndefinedConstantExpressions,
-                    std::map<std::string, std::shared_ptr<storm::ir::expressions::DoubleConstantExpression>> doubleUndefinedConstantExpressions,
-                    std::vector<storm::ir::Module> modules,
-                    std::map<std::string, storm::ir::RewardModel> rewards,
-                    std::map<std::string, std::shared_ptr<storm::ir::expressions::BaseExpression>> labels);
+                    std::map<std::string, std::shared_ptr<storm::ir::expressions::BooleanConstantExpression>> const& booleanUndefinedConstantExpressions,
+                    std::map<std::string, std::shared_ptr<storm::ir::expressions::IntegerConstantExpression>> const& integerUndefinedConstantExpressions,
+                    std::map<std::string, std::shared_ptr<storm::ir::expressions::DoubleConstantExpression>> const& doubleUndefinedConstantExpressions,
+                    std::vector<BooleanVariable> const& globalBooleanVariables,
+                    std::vector<IntegerVariable> const& globalIntegerVariables,
+                    std::map<std::string, uint_fast64_t> const& globalBooleanVariableToIndexMap,
+                    std::map<std::string, uint_fast64_t> const& globalIntegerVariableToIndexMap,
+                    std::vector<storm::ir::Module> const& modules,
+                    std::map<std::string, storm::ir::RewardModel> const& rewards,
+                    std::map<std::string, std::shared_ptr<storm::ir::expressions::BaseExpression>> const& labels);
             
             /*!
              * Retrieves the number of modules in the program.
@@ -90,6 +100,20 @@ namespace storm {
              */
             std::string toString() const;
             
+            /*!
+             * Retrieves a reference to the global boolean variable with the given index.
+             *
+             * @return A reference to the global boolean variable with the given index.
+             */
+            storm::ir::BooleanVariable const& getGlobalBooleanVariable(uint_fast64_t index) const;
+            
+            /*!
+             * Retrieves a reference to the global integer variable with the given index.
+             *
+             * @return A reference to the global integer variable with the given index.
+             */
+            storm::ir::IntegerVariable const& getGlobalIntegerVariable(uint_fast64_t index) const;
+            
             /*!
              * Retrieves the set of actions present in this module.
              *
@@ -114,6 +138,20 @@ namespace storm {
              */
             uint_fast64_t getModuleIndexForVariable(std::string const& variableName) const;
             
+            /*!
+             * Retrieves the number of global boolean variables of the program.
+             *
+             * @return The number of global boolean variables of the program.
+             */
+            uint_fast64_t getNumberOfGlobalBooleanVariables() const;
+            
+            /*!
+             * Retrieves the number of global integer variables of the program.
+             *
+             * @return The number of global integer variables of the program.
+             */
+            uint_fast64_t getNumberOfGlobalIntegerVariables() const;
+            
             /*!
              * Retrieves the reward model with the given name.
              *
@@ -129,6 +167,51 @@ namespace storm {
              */
             std::map<std::string, std::shared_ptr<storm::ir::expressions::BaseExpression>> const& getLabels() const;
             
+            /*!
+             * Retrieves whether the given constant name is an undefined boolean constant of the program.
+             *
+             * @return True if the given constant name is an undefined boolean constant of the program.
+             */
+            bool hasUndefinedBooleanConstant(std::string const& constantName) const;
+            
+            /*!
+             * Retrieves the expression associated with the given undefined boolean constant.
+             *
+             * @param constantName The name of the undefined boolean constant for which to retrieve the expression.
+             * @return The expression associated with the given undefined boolean constant.
+             */
+            std::shared_ptr<storm::ir::expressions::BooleanConstantExpression> getUndefinedBooleanConstantExpression(std::string const& constantName) const;
+            
+            /*!
+             * Retrieves whether the given constant name is an undefined integer constant of the program.
+             *
+             * @return True if the given constant name is an undefined integer constant of the program.
+             */
+            bool hasUndefinedIntegerConstant(std::string const& constantName) const;
+            
+            /*!
+             * Retrieves the expression associated with the given undefined integer constant.
+             *
+             * @param constantName The name of the undefined integer constant for which to retrieve the expression.
+             * @return The expression associated with the given undefined integer constant.
+             */
+            std::shared_ptr<storm::ir::expressions::IntegerConstantExpression> getUndefinedIntegerConstantExpression(std::string const& constantName) const;
+
+            /*!
+             * Retrieves whether the given constant name is an undefined double constant of the program.
+             *
+             * @return True if the given constant name is an undefined double constant of the program.
+             */
+            bool hasUndefinedDoubleConstant(std::string const& constantName) const;
+            
+            /*!
+             * Retrieves the expression associated with the given undefined double constant.
+             *
+             * @param constantName The name of the undefined double constant for which to retrieve the expression.
+             * @return The expression associated with the given undefined double constant.
+             */
+            std::shared_ptr<storm::ir::expressions::DoubleConstantExpression> getUndefinedDoubleConstantExpression(std::string const& constantName) const;
+            
         private:
             // The type of the model.
             ModelType modelType;
@@ -142,6 +225,18 @@ namespace storm {
             // A map of undefined double constants to their expressions nodes.
             std::map<std::string, std::shared_ptr<storm::ir::expressions::DoubleConstantExpression>> doubleUndefinedConstantExpressions;
             
+            // A list of global boolean variables.
+            std::vector<BooleanVariable> globalBooleanVariables;
+            
+            // A list of global integer variables.
+            std::vector<IntegerVariable> globalIntegerVariables;
+            
+            // A mapping from global boolean variable names to their indices.
+            std::map<std::string, uint_fast64_t> globalBooleanVariableToIndexMap;
+            
+            // A mapping from global integer variable names to their indices.
+            std::map<std::string, uint_fast64_t> globalIntegerVariableToIndexMap;
+            
             // The modules associated with the program.
             std::vector<storm::ir::Module> modules;
             

src/ir/expressions/IntegerConstantExpression.cpp

@@ -6,7 +6,7 @@
  */
 
 #include <sstream>
-
+#include <iostream>
 #include "IntegerConstantExpression.h"
 
 namespace storm {
@@ -14,11 +14,13 @@ namespace storm {
         namespace expressions {
             
             IntegerConstantExpression::IntegerConstantExpression(std::string const& constantName) : ConstantExpression(int_, constantName), value(0), defined(false) {
+                std::cout << "Creating constant integer expression with constant name " << constantName << "[" << this << "]" << std::endl;
                 // Nothing to do here.
             }
             
             IntegerConstantExpression::IntegerConstantExpression(IntegerConstantExpression const& integerConstantExpression)
             : ConstantExpression(integerConstantExpression), value(integerConstantExpression.value), defined(integerConstantExpression.defined) {
+                std::cout << "Creating constant integer expression as copy of " << integerConstantExpression.toString() << "[" << this << "]" << std::endl;
                 // Nothing to do here.
             }
             

src/models/AbstractModel.h

@@ -18,7 +18,7 @@ namespace models {
  *  @brief  Enumeration of all supported types of models.
  */
 enum ModelType {
-    Unknown, DTMC, CTMC, MDP, UPDATE_LABELED_MDP, CTMDP
+    Unknown, DTMC, CTMC, MDP, CTMDP
 };
 
 /*!
@@ -346,6 +346,14 @@ class AbstractModel: public std::enable_shared_from_this<AbstractModel<T>> {
 			return stateRewardVector.get();
 		}
     
+        /*!
+         * Returns the labels for the choices of the model, if there are any.
+         * @return The labels for the choices of the model.
+         */
+        std::vector<std::list<uint_fast64_t>> const& getChoiceLabeling() const {
+            return choiceLabeling.get();
+        }
+
 		/*!
 		 * Returns the set of labels with which the given state is labeled.
          *
@@ -380,6 +388,14 @@ class AbstractModel: public std::enable_shared_from_this<AbstractModel<T>> {
 			return transitionRewardMatrix;
 		}
     
+        /*!
+         * Retrieves whether this model has a labeling for the choices.
+         * @return True if this model has a labeling.
+         */
+        bool hasChoiceLabels() const {
+            return choiceLabeling;
+        }
+
 		/*!
 		 * Retrieves the size of the internal representation of the model in memory.
 		 * @return the size of the internal representation of the model in memory

src/parser/prismparser/PrismGrammar.cpp

@@ -50,16 +50,16 @@ void PrismGrammar::addLabel(std::string const& name, std::shared_ptr<BaseExpress
 }
     
 void PrismGrammar::addIntegerAssignment(std::string const& variable, std::shared_ptr<BaseExpression> const& value, std::map<std::string, Assignment>& variableToAssignmentMap) {
-	this->state->assignedLocalIntegerVariables_.add(variable, variable);
+	this->state->assignedIntegerVariables_.add(variable, variable);
 	variableToAssignmentMap[variable] = Assignment(variable, value);
 }
     
 void PrismGrammar::addBooleanAssignment(std::string const& variable, std::shared_ptr<BaseExpression> const& value, std::map<std::string, Assignment>& variableToAssigmentMap) {
-	this->state->assignedLocalBooleanVariables_.add(variable, variable);
+	this->state->assignedBooleanVariables_.add(variable, variable);
 	variableToAssigmentMap[variable] = Assignment(variable, value);
 }
     
-Module PrismGrammar::renameModule(std::string const& newName, std::string const& oldName, std::map<std::string, std::string>& renaming) {
+Module PrismGrammar::renameModule(std::string const& newName, std::string const& oldName, std::map<std::string, std::string> const& renaming) {
 	this->state->moduleNames_.add(newName, newName);
 	Module* old = this->moduleMap_.find(oldName);
 	if (old == nullptr) {
@@ -78,34 +78,40 @@ Module PrismGrammar::createModule(std::string const& name, std::vector<BooleanVa
 	return res;
 }
 
-void PrismGrammar::createIntegerVariable(std::string const& name, std::shared_ptr<BaseExpression> const& lower, std::shared_ptr<BaseExpression> const& upper, std::shared_ptr<BaseExpression> const& init, std::vector<IntegerVariable>& vars, std::map<std::string, uint_fast64_t>& varids) {
+void PrismGrammar::createIntegerVariable(std::string const& name, std::shared_ptr<BaseExpression> const& lower, std::shared_ptr<BaseExpression> const& upper, std::shared_ptr<BaseExpression> const& init, std::vector<IntegerVariable>& vars, std::map<std::string, uint_fast64_t>& varids, bool isGlobalVariable) {
 	uint_fast64_t id = this->state->addIntegerVariable(name);
     uint_fast64_t newLocalIndex = this->state->nextLocalIntegerVariableIndex;
 	vars.emplace_back(newLocalIndex, id, name, lower, upper, init);
 	varids[name] = newLocalIndex;
     ++this->state->nextLocalIntegerVariableIndex;
 	this->state->localIntegerVariables_.add(name, name);
+    if (isGlobalVariable) {
+        this->state->globalIntegerVariables_.add(name, name);
+    }
 }
     
-void PrismGrammar::createBooleanVariable(std::string const& name, std::shared_ptr<BaseExpression> const& init, std::vector<BooleanVariable>& vars, std::map<std::string, uint_fast64_t>& varids) {
+void PrismGrammar::createBooleanVariable(std::string const& name, std::shared_ptr<BaseExpression> const& init, std::vector<BooleanVariable>& vars, std::map<std::string, uint_fast64_t>& varids, bool isGlobalVariable) {
 	uint_fast64_t id = this->state->addBooleanVariable(name);
     uint_fast64_t newLocalIndex = this->state->nextLocalBooleanVariableIndex;
 	vars.emplace_back(newLocalIndex, id, name, init);
 	varids[name] = newLocalIndex;
     ++this->state->nextLocalBooleanVariableIndex;
 	this->state->localBooleanVariables_.add(name, name);
+    if (isGlobalVariable) {
+        this->state->globalBooleanVariables_.add(name, name);
+    }
 }
 
 StateReward createStateReward(std::shared_ptr<BaseExpression> guard, std::shared_ptr<BaseExpression> reward) {
 	return StateReward(guard, reward);
 }
-TransitionReward createTransitionReward(std::string label, std::shared_ptr<BaseExpression> guard, std::shared_ptr<BaseExpression> reward) {
+TransitionReward createTransitionReward(std::string const& label, std::shared_ptr<BaseExpression> guard, std::shared_ptr<BaseExpression> reward) {
 	return TransitionReward(label, guard, reward);
 }
-void createRewardModel(std::string name, std::vector<StateReward>& stateRewards, std::vector<TransitionReward>& transitionRewards, std::map<std::string, RewardModel>& mapping) {
+void createRewardModel(std::string const& name, std::vector<StateReward>& stateRewards, std::vector<TransitionReward>& transitionRewards, std::map<std::string, RewardModel>& mapping) {
 	mapping[name] = RewardModel(name, stateRewards, transitionRewards);
 }
-Update createUpdate(std::shared_ptr<BaseExpression> likelihood, std::map<std::string, Assignment>& bools, std::map<std::string, Assignment> ints) {
+Update createUpdate(std::shared_ptr<BaseExpression> likelihood, std::map<std::string, Assignment> const& bools, std::map<std::string, Assignment> const& ints) {
 	return Update(likelihood, bools, ints);
 }
 Command PrismGrammar::createCommand(std::string const& label, std::shared_ptr<BaseExpression> guard, std::vector<Update> const& updates) {
@@ -114,13 +120,17 @@ Command PrismGrammar::createCommand(std::string const& label, std::shared_ptr<Ba
 }
 Program createProgram(
 		Program::ModelType modelType,
-		std::map<std::string, std::shared_ptr<BooleanConstantExpression>> undefBoolConst,
-		std::map<std::string, std::shared_ptr<IntegerConstantExpression>> undefIntConst,
-		std::map<std::string, std::shared_ptr<DoubleConstantExpression>> undefDoubleConst,
-		std::vector<Module> modules,
-		std::map<std::string, RewardModel> rewards,
-		std::map<std::string, std::shared_ptr<BaseExpression>> labels) {
-	return Program(modelType, undefBoolConst, undefIntConst, undefDoubleConst, modules, rewards, labels);
+		std::map<std::string, std::shared_ptr<BooleanConstantExpression>> const& undefBoolConst,
+		std::map<std::string, std::shared_ptr<IntegerConstantExpression>> const& undefIntConst,
+		std::map<std::string, std::shared_ptr<DoubleConstantExpression>> const& undefDoubleConst,
+        GlobalVariableInformation const& globalVariableInformation,
+		std::vector<Module> const& modules,
+		std::map<std::string, RewardModel> const& rewards,
+		std::map<std::string, std::shared_ptr<BaseExpression>> const& labels) {
+	return Program(modelType, undefBoolConst, undefIntConst, undefDoubleConst,
+                   globalVariableInformation.booleanVariables, globalVariableInformation.integerVariables,
+                   globalVariableInformation.booleanVariableToIndexMap,
+                   globalVariableInformation.integerVariableToIndexMap, modules, rewards, labels);
 }
 
 PrismGrammar::PrismGrammar() : PrismGrammar::base_type(start), state(new VariableState()) {
@@ -144,10 +154,10 @@ PrismGrammar::PrismGrammar() : PrismGrammar::base_type(start), state(new Variabl
 
 	commandName %= this->state->commandNames_;
 	commandName.name("command name");
-	unassignedLocalBooleanVariableName %= this->state->localBooleanVariables_ - this->state->assignedLocalBooleanVariables_;
-	unassignedLocalBooleanVariableName.name("unassigned local boolean variable");
-	unassignedLocalIntegerVariableName %= this->state->localIntegerVariables_ - this->state->assignedLocalIntegerVariables_;
-	unassignedLocalIntegerVariableName.name("unassigned local integer variable");
+	unassignedLocalBooleanVariableName %= (this->state->localBooleanVariables_ | this->state->globalBooleanVariables_) - this->state->assignedBooleanVariables_;
+	unassignedLocalBooleanVariableName.name("unassigned local/global boolean variable");
+	unassignedLocalIntegerVariableName %= (this->state->localIntegerVariables_ | this->state->globalIntegerVariables_) - this->state->assignedIntegerVariables_;
+	unassignedLocalIntegerVariableName.name("unassigned local/global integer variable");
 
 	// This block defines all entities that are needed for parsing a single command.
 	assignmentDefinition =
@@ -157,7 +167,7 @@ PrismGrammar::PrismGrammar() : PrismGrammar::base_type(start), state(new Variabl
 	assignmentDefinitionList = assignmentDefinition(qi::_r1, qi::_r2) % "&";
 	assignmentDefinitionList.name("assignment list");
 	updateDefinition = (
-			ConstDoubleExpressionGrammar::instance(this->state) > qi::lit(":")[phoenix::clear(phoenix::ref(this->state->assignedLocalBooleanVariables_)), phoenix::clear(phoenix::ref(this->state->assignedLocalIntegerVariables_))] > assignmentDefinitionList(qi::_a, qi::_b))[qi::_val = phoenix::bind(&createUpdate, qi::_1, qi::_a, qi::_b)];
+			ConstDoubleExpressionGrammar::instance(this->state) > qi::lit(":")[phoenix::clear(phoenix::ref(this->state->assignedBooleanVariables_)), phoenix::clear(phoenix::ref(this->state->assignedIntegerVariables_))] > assignmentDefinitionList(qi::_a, qi::_b))[qi::_val = phoenix::bind(&createUpdate, qi::_1, qi::_a, qi::_b)];
 	updateDefinition.name("update");
 	updateListDefinition = +updateDefinition % "+";
 	updateListDefinition.name("update list");
@@ -170,17 +180,13 @@ PrismGrammar::PrismGrammar() : PrismGrammar::base_type(start), state(new Variabl
 
 	// This block defines all entities that are needed for parsing variable definitions.
 	booleanVariableDefinition = (FreeIdentifierGrammar::instance(this->state) >> qi::lit(":") >> qi::lit("bool") > -(qi::lit("init") > ConstBooleanExpressionGrammar::instance(this->state)[qi::_b = phoenix::construct<std::shared_ptr<BaseExpression>>(qi::_1)]) > qi::lit(";"))
-		[
-			phoenix::bind(&PrismGrammar::createBooleanVariable, this, qi::_1, qi::_b, qi::_r1, qi::_r2)
-		];
+		[phoenix::bind(&PrismGrammar::createBooleanVariable, this, qi::_1, qi::_b, qi::_r1, qi::_r2, qi::_r3)];
 	booleanVariableDefinition.name("boolean variable declaration");
 
 	integerVariableDefinition = (FreeIdentifierGrammar::instance(this->state) >> qi::lit(":") >> qi::lit("[") > ConstIntegerExpressionGrammar::instance(this->state) > qi::lit("..") > ConstIntegerExpressionGrammar::instance(this->state) > qi::lit("]") > -(qi::lit("init") > ConstIntegerExpressionGrammar::instance(this->state)[qi::_b = phoenix::construct<std::shared_ptr<BaseExpression>>(qi::_1)]) > qi::lit(";"))
-		[
-			phoenix::bind(&PrismGrammar::createIntegerVariable, this, qi::_1, qi::_2, qi::_3, qi::_b, qi::_r1, qi::_r2)
-		];
+        [phoenix::bind(&PrismGrammar::createIntegerVariable, this, qi::_1, qi::_2, qi::_3, qi::_b, qi::_r1, qi::_r2, qi::_r3)];
 	integerVariableDefinition.name("integer variable declaration");
-	variableDefinition = (booleanVariableDefinition(qi::_r1, qi::_r3) | integerVariableDefinition(qi::_r2, qi::_r4));
+	variableDefinition = (booleanVariableDefinition(qi::_r1, qi::_r3, false) | integerVariableDefinition(qi::_r2, qi::_r4, false));
 	variableDefinition.name("variable declaration");
 
 	// This block defines all entities that are needed for parsing a module.
@@ -198,6 +204,10 @@ PrismGrammar::PrismGrammar() : PrismGrammar::base_type(start), state(new Variabl
 	moduleDefinitionList %= +(moduleDefinition | moduleRenaming);
 	moduleDefinitionList.name("module list");
 
+    // This block defines all entities that are needed for parsing global variable definitions.
+    globalVariableDefinitionList = *(qi::lit("global") > (booleanVariableDefinition(bind(&GlobalVariableInformation::booleanVariables, qi::_r1), bind(&GlobalVariableInformation::booleanVariableToIndexMap, qi::_r1), true) | integerVariableDefinition(bind(&GlobalVariableInformation::integerVariables, qi::_r1), bind(&GlobalVariableInformation::integerVariableToIndexMap, qi::_r1), true)));
+    globalVariableDefinitionList.name("global variable declaration list");
+    
 	// This block defines all entities that are needed for parsing constant definitions.
 	definedBooleanConstantDefinition = (qi::lit("const") >> qi::lit("bool") >> FreeIdentifierGrammar::instance(this->state) >> qi::lit("=") > ConstBooleanExpressionGrammar::instance(this->state) > qi::lit(";"))[phoenix::bind(this->state->booleanConstants_.add, qi::_1, qi::_2), phoenix::bind(this->state->allConstantNames_.add, qi::_1, qi::_1), qi::_val = qi::_2];
 	definedBooleanConstantDefinition.name("defined boolean constant declaration");
@@ -227,10 +237,10 @@ PrismGrammar::PrismGrammar() : PrismGrammar::base_type(start), state(new Variabl
 	start = (
 			modelTypeDefinition >
 			constantDefinitionList(qi::_a, qi::_b, qi::_c) >
+            globalVariableDefinitionList(qi::_d) >
 			moduleDefinitionList >
-			rewardDefinitionList(qi::_d) >
-			labelDefinitionList(qi::_e)
-		)[qi::_val = phoenix::bind(&createProgram, qi::_1, qi::_a, qi::_b, qi::_c, qi::_2, qi::_d, qi::_e)];
+			rewardDefinitionList(qi::_e) >
+			labelDefinitionList(qi::_f))[qi::_val = phoenix::bind(&createProgram, qi::_1, qi::_a, qi::_b, qi::_c, qi::_d, qi::_2, qi::_e, qi::_f)];
 	start.name("probabilistic program declaration");
 }
 

src/parser/prismparser/PrismGrammar.h

@@ -31,6 +31,13 @@ namespace prism {
 using namespace storm::ir;
 using namespace storm::ir::expressions;
 
+struct GlobalVariableInformation {
+    std::vector<BooleanVariable> booleanVariables;
+    std::vector<IntegerVariable> integerVariables;
+    std::map<std::string, uint_fast64_t> booleanVariableToIndexMap;
+    std::map<std::string, uint_fast64_t> integerVariableToIndexMap;
+};
+    
 /*!
  * The Boost spirit grammar for the PRISM language. Returns the intermediate representation of
  * the input that complies with the PRISM syntax.
@@ -42,6 +49,7 @@ class PrismGrammar : public qi::grammar<
 		std::map<std::string, std::shared_ptr<BooleanConstantExpression>>,
 		std::map<std::string, std::shared_ptr<IntegerConstantExpression>>,
 		std::map<std::string, std::shared_ptr<DoubleConstantExpression>>,
+        GlobalVariableInformation,
 		std::map<std::string, RewardModel>,
 		std::map<std::string, std::shared_ptr<BaseExpression>>
 	>,
@@ -77,6 +85,7 @@ private:
 				std::map<std::string, std::shared_ptr<BooleanConstantExpression>>,
 				std::map<std::string, std::shared_ptr<IntegerConstantExpression>>,
 				std::map<std::string, std::shared_ptr<DoubleConstantExpression>>,
+                GlobalVariableInformation,
 				std::map<std::string, RewardModel>,
 				std::map<std::string, std::shared_ptr<BaseExpression>>
 			>,
@@ -85,14 +94,17 @@ private:
 	qi::rule<Iterator, qi::unused_type(std::map<std::string, std::shared_ptr<BooleanConstantExpression>>&, std::map<std::string, std::shared_ptr<IntegerConstantExpression>>&, std::map<std::string, std::shared_ptr<DoubleConstantExpression>>&), Skipper> constantDefinitionList;
 	qi::rule<Iterator, std::vector<Module>(), Skipper> moduleDefinitionList;
         
+    // Rules for global variable definitions
+    qi::rule<Iterator, qi::unused_type(GlobalVariableInformation&), Skipper> globalVariableDefinitionList;
+
 	// Rules for module definition.
 	qi::rule<Iterator, Module(), qi::locals<std::vector<BooleanVariable>, std::vector<IntegerVariable>, std::map<std::string, uint_fast64_t>, std::map<std::string, uint_fast64_t>>, Skipper> moduleDefinition;
 	qi::rule<Iterator, Module(), qi::locals<std::map<std::string, std::string>>, Skipper> moduleRenaming;
 
 	// Rules for variable definitions.
 	qi::rule<Iterator, qi::unused_type(std::vector<BooleanVariable>&, std::vector<IntegerVariable>&, std::map<std::string, uint_fast64_t>&, std::map<std::string, uint_fast64_t>&), Skipper> variableDefinition;
-	qi::rule<Iterator, qi::unused_type(std::vector<BooleanVariable>&, std::map<std::string, uint_fast64_t>&), qi::locals<uint_fast64_t, std::shared_ptr<BaseExpression>>, Skipper> booleanVariableDefinition;
-	qi::rule<Iterator, qi::unused_type(std::vector<IntegerVariable>&, std::map<std::string, uint_fast64_t>&), qi::locals<uint_fast64_t, std::shared_ptr<BaseExpression>>, Skipper> integerVariableDefinition;
+	qi::rule<Iterator, qi::unused_type(std::vector<BooleanVariable>&, std::map<std::string, uint_fast64_t>&, bool), qi::locals<uint_fast64_t, std::shared_ptr<BaseExpression>>, Skipper> booleanVariableDefinition;
+	qi::rule<Iterator, qi::unused_type(std::vector<IntegerVariable>&, std::map<std::string, uint_fast64_t>&, bool), qi::locals<uint_fast64_t, std::shared_ptr<BaseExpression>>, Skipper> integerVariableDefinition;
 
 	// Rules for command definitions.
 	qi::rule<Iterator, Command(), qi::locals<std::string>, Skipper> commandDefinition;
@@ -180,7 +192,7 @@ private:
      * @param oldName The name of the module that is to be copied (modulo renaming).
      * @param renaming A mapping from identifiers to their new names.
      */
-	Module renameModule(std::string const& name, std::string const& oldName, std::map<std::string, std::string>& renaming);
+	Module renameModule(std::string const& name, std::string const& oldName, std::map<std::string, std::string> const& renaming);
         
     /*!
      * Creates a new module with the given name, boolean and integer variables and commands.
@@ -203,8 +215,9 @@ private:
      * @param upper The expression that defines the upper bound of the domain.
      * @param init The expression that defines the initial value of the variable.
      * @param integerVariableToGlobalIndexMap A mapping of integer variables to global indices.
+     * @param isGlobalVariable A flag indicating whether the variable is supposed to be global or not.
      */
-	void createIntegerVariable(std::string const& name, std::shared_ptr<BaseExpression> const& lower, std::shared_ptr<BaseExpression> const& upper, std::shared_ptr<BaseExpression> const& init, std::vector<IntegerVariable>& integerVariables, std::map<std::string, uint_fast64_t>& integerVariableToGlobalIndexMap);
+	void createIntegerVariable(std::string const& name, std::shared_ptr<BaseExpression> const& lower, std::shared_ptr<BaseExpression> const& upper, std::shared_ptr<BaseExpression> const& init, std::vector<IntegerVariable>& integerVariables, std::map<std::string, uint_fast64_t>& integerVariableToGlobalIndexMap, bool isGlobalVariable);
         
     /*!
     * Creates an boolean variable with the given name and initial value and adds it to the
@@ -213,8 +226,9 @@ private:
     * @param name The name of the boolean variable.
     * @param init The expression that defines the initial value of the variable.
     * @param booleanVariableToGlobalIndexMap A mapping of boolean variables to global indices.
+    * @param isGlobalVariable A flag indicating whether the variable is supposed to be global or not.
     */
-	void createBooleanVariable(std::string const& name, std::shared_ptr<BaseExpression> const& init, std::vector<BooleanVariable>& booleanVariables, std::map<std::string, uint_fast64_t>& booleanVariableToGlobalIndexMap);
+	void createBooleanVariable(std::string const& name, std::shared_ptr<BaseExpression> const& init, std::vector<BooleanVariable>& booleanVariables, std::map<std::string, uint_fast64_t>& booleanVariableToGlobalIndexMap, bool isGlobalVariable);
     
     /*!
      * Creates a command with the given label, guard and updates.

src/parser/prismparser/VariableState.h

@@ -119,7 +119,8 @@ public:
 	// A structure representing the identity function over identifier names.
 	struct variableNamesStruct : qi::symbols<char, std::string> { }
             integerVariableNames_, booleanVariableNames_, commandNames_, labelNames_, allConstantNames_, moduleNames_,
-			localBooleanVariables_, localIntegerVariables_, assignedLocalBooleanVariables_, assignedLocalIntegerVariables_;
+			localBooleanVariables_, localIntegerVariables_, assignedBooleanVariables_, assignedIntegerVariables_,
+            globalBooleanVariables_, globalIntegerVariables_;
 	
 	/*!
 	 * Adds a new boolean variable with the given name.

src/storm.cpp

@@ -332,8 +332,16 @@ int main(const int argc, const char* argv[]) {
 		} else if (s->isSet("symbolic")) {
 			std::string const arg = s->getOptionByLongName("symbolic").getArgument(0).getValueAsString();
 			storm::adapters::ExplicitModelAdapter adapter(storm::parser::PrismParserFromFile(arg));
-			std::shared_ptr<storm::models::AbstractModel<double>> model = adapter.getModel();
+			std::shared_ptr<storm::models::AbstractModel<double>> model = adapter.getModel("K=2");
 			model->printModelInformationToStream(std::cout);
+            
+            if (model->getType() == storm::models::MDP) {
+                std::shared_ptr<storm::models::Mdp<double>> labeledMdp = model->as<storm::models::Mdp<double>>();
+                storm::storage::BitVector const& finishedStates = labeledMdp->getLabeledStates("finished");
+                storm::storage::BitVector const& allCoinsEqualStates = labeledMdp->getLabeledStates("agree");
+                storm::storage::BitVector targetStates = finishedStates & allCoinsEqualStates;
+                storm::counterexamples::MinimalLabelSetGenerator<double>::getMinimalLabelSet(*labeledMdp, storm::storage::BitVector(labeledMdp->getNumberOfStates(), true), targetStates, 0.4, true);
+            }
 		}
 
         // Perform clean-up and terminate.