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Started refactoring explicit model generator of PRISM models 

Former-commit-id: 4ea82670d0
main
dehnert 11 years ago
parent
4758ef73ec
commit
91e177028d
7 changed files with 870 additions and 796 deletions
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  1. 2
      CMakeLists.txt
  2. 791
      src/adapters/ExplicitModelAdapter.h
  3. 616
      src/builder/ExplicitPrismModelBuilder.cpp
  4. 248
      src/builder/ExplicitPrismModelBuilder.h
  5. 1
      src/counterexamples/SMTMinimalCommandSetGenerator.h
  6. 2
      src/storage/BitVectorHashMap.cpp
  7. 6
      src/utility/cli.h

2
CMakeLists.txt
View File

@ -252,6 +252,7 @@ file(GLOB_RECURSE STORM_SOURCES_WITHOUT_MAIN ${PROJECT_SOURCE_DIR}/src/*/*.cpp)
file(GLOB_RECURSE STORM_MAIN_FILE ${PROJECT_SOURCE_DIR}/src/storm.cpp)
set(STORM_SOURCES "${STORM_SOURCES_WITHOUT_MAIN};${STORM_MAIN_FILE}")
file(GLOB_RECURSE STORM_ADAPTERS_FILES ${PROJECT_SOURCE_DIR}/src/adapters/*.h ${PROJECT_SOURCE_DIR}/src/adapters/*.cpp)
file(GLOB_RECURSE STORM_BUILDER_FILES ${PROJECT_SOURCE_DIR}/src/builder/*.h ${PROJECT_SOURCE_DIR}/src/builder/*.cpp)
file(GLOB_RECURSE STORM_EXCEPTIONS_FILES ${PROJECT_SOURCE_DIR}/src/exceptions/*.h ${PROJECT_SOURCE_DIR}/src/exceptions/*.cpp)
file(GLOB STORM_PROPERTIES_FILES ${PROJECT_SOURCE_DIR}/src/properties/*.h ${PROJECT_SOURCE_DIR}/src/properties/*.cpp)
file(GLOB_RECURSE STORM_PROPERTIES_CSL_FILES ${PROJECT_SOURCE_DIR}/src/properties/csl/*.h ${PROJECT_SOURCE_DIR}/src/properties/csl/*.cpp)
@ -286,6 +287,7 @@ file(GLOB_RECURSE STORM_BUILD_HEADERS ${PROJECT_BINARY_DIR}/include/*.h)
# Group the headers and sources
source_group(main FILES ${STORM_MAIN_FILE})
source_group(adapters FILES ${STORM_ADAPTERS_FILES})
source_group(builder FILES ${STORM_BUILDER_FILES})
source_group(exceptions FILES ${STORM_EXCEPTIONS_FILES})
source_group(properties FILES ${STORM_PROPERTIES_FILES})
source_group(properties\\csl FILES ${STORM_PROPERTIES_CSL_FILES})

791
src/adapters/ExplicitModelAdapter.h
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@ -1,791 +0,0 @@
#ifndef STORM_ADAPTERS_EXPLICITMODELADAPTER_H
#define STORM_ADAPTERS_EXPLICITMODELADAPTER_H
#include <memory>
#include <unordered_map>
#include <utility>
#include <vector>
#include <queue>
#include <cstdint>
#include <boost/functional/hash.hpp>
#include <boost/container/flat_set.hpp>
#include <boost/algorithm/string.hpp>
#include "src/storage/prism/Program.h"
#include "src/storage/expressions/SimpleValuation.h"
#include "src/storage/expressions/ExprtkExpressionEvaluator.h"
#include "src/storage/BitVectorHashMap.h"
#include "src/utility/PrismUtility.h"
#include "src/models/AbstractModel.h"
#include "src/models/Dtmc.h"
#include "src/models/Ctmc.h"
#include "src/models/Mdp.h"
#include "src/models/Ctmdp.h"
#include "src/models/AtomicPropositionsLabeling.h"
#include "src/storage/SparseMatrix.h"
#include "src/settings/SettingsManager.h"
#include "src/utility/macros.h"
#include "src/exceptions/WrongFormatException.h"
namespace storm {
namespace adapters {
using namespace storm::utility::prism;
template<typename ValueType>
class ExplicitModelAdapter {
public:
typedef storm::storage::BitVector StateType;
// A structure holding information about the reachable state space.
struct StateInformation {
StateInformation(uint64_t bitsPerState) : bitsPerState(bitsPerState), reachableStates(), stateToIndexMap(bitsPerState, 1000000) {
// Intentionally left empty.
}
// The number of bits of each state.
uint64_t bitsPerState;
// A list of reachable states as indices in the stateToIndexMap.
std::vector<storm::storage::BitVector> reachableStates;
// A list of initial states in terms of their global indices.
std::vector<uint32_t> initialStateIndices;
// A mapping from reachable states to their indices.
storm::storage::BitVectorHashMap<uint32_t> stateToIndexMap;
};
// A structure storing information about the used variables of the program.
struct VariableInformation {
struct BooleanVariableInformation {
BooleanVariableInformation(storm::expressions::Variable const& variable, bool initialValue, uint_fast64_t bitOffset) : variable(variable), initialValue(initialValue), bitOffset(bitOffset) {
// Intentionally left empty.
}
storm::expressions::Variable variable;
bool initialValue;
uint_fast64_t bitOffset;
};
struct IntegerVariableInformation {
IntegerVariableInformation(storm::expressions::Variable const& variable, int_fast64_t initialValue, int_fast64_t lowerBound, int_fast64_t upperBound, uint_fast64_t bitOffset, uint_fast64_t bitWidth) : variable(variable), initialValue(initialValue), lowerBound(lowerBound), upperBound(upperBound), bitOffset(bitOffset), bitWidth(bitWidth) {
// Intentionally left empty.
}
storm::expressions::Variable variable;
int_fast64_t initialValue;
int_fast64_t lowerBound;
int_fast64_t upperBound;
uint_fast64_t bitOffset;
uint_fast64_t bitWidth;
};
uint_fast64_t getBitOffset(storm::expressions::Variable const& variable) const {
auto const& booleanIndex = booleanVariableToIndexMap.find(variable);
if (booleanIndex != booleanVariableToIndexMap.end()) {
return booleanVariables[booleanIndex].bitOffset;
}
auto const& integerIndex = integerVariableToIndexMap.find(variable);
if (integerIndex != integerVariableToIndexMap.end()) {
return integerVariables[integerIndex].bitOffset;
}
STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Cannot look-up bit index of unknown variable.");
}
uint_fast64_t getBitWidth(storm::expressions::Variable const& variable) const {
auto const& integerIndex = integerVariableToIndexMap.find(variable);
if (integerIndex != integerVariableToIndexMap.end()) {
return integerVariables[integerIndex].bitWidth;
}
STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Cannot look-up bit width of unknown variable.");
}
// The list of boolean variables.
std::map<storm::expressions::Variable, uint_fast64_t> booleanVariableToIndexMap;
std::vector<BooleanVariableInformation> booleanVariables;
// The list of integer variables.
std::map<storm::expressions::Variable, uint_fast64_t> integerVariableToIndexMap;
std::vector<IntegerVariableInformation> integerVariables;
};
// A structure holding the individual components of a model.
struct ModelComponents {
ModelComponents() : transitionMatrix(), stateLabeling(), stateRewards(), transitionRewardMatrix(), choiceLabeling() {
// Intentionally left empty.
}
// The transition matrix.
storm::storage::SparseMatrix<ValueType> transitionMatrix;
// The state labeling.
storm::models::AtomicPropositionsLabeling stateLabeling;
// The state reward vector.
std::vector<ValueType> stateRewards;
// A matrix storing the reward for particular transitions.
storm::storage::SparseMatrix<ValueType> transitionRewardMatrix;
// A vector that stores a labeling for each choice.
std::vector<boost::container::flat_set<uint_fast64_t>> choiceLabeling;
};
/*!
* 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 program The program to translate.
* @param constantDefinitionString A string that contains a comma-separated definition of all undefined
* constants in the model.
* @param rewardModel The reward model that is to be built.
* @return The explicit model that was given by the probabilistic program.
*/
static std::unique_ptr<storm::models::AbstractModel<ValueType>> translateProgram(storm::prism::Program program, bool rewards = true, std::string const& rewardModelName = "", std::string const& constantDefinitionString = "") {
// Start by defining the undefined constants in the model.
// First, we need to parse the constant definition string.
std::map<storm::expressions::Variable, storm::expressions::Expression> constantDefinitions = storm::utility::prism::parseConstantDefinitionString(program, constantDefinitionString);
storm::prism::Program preparedProgram = program.defineUndefinedConstants(constantDefinitions);
STORM_LOG_THROW(!preparedProgram.hasUndefinedConstants(), storm::exceptions::InvalidArgumentException, "Program still contains undefined constants.");
// Now that we have defined all the constants in the program, we need to substitute their appearances in
// 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 rewardModel = storm::prism::RewardModel();
// Select the appropriate reward model.
if (rewards) {
// If a specific reward model was selected or one with the empty name exists, select it.
if (rewardModelName != "" || preparedProgram.hasRewardModel(rewardModelName)) {
rewardModel = preparedProgram.getRewardModel(rewardModelName);
} else if (preparedProgram.hasRewardModel()) {
// Otherwise, we select the first one.
rewardModel = preparedProgram.getRewardModel(0);
}
}
ModelComponents modelComponents = buildModelComponents(preparedProgram, rewardModel);
std::unique_ptr<storm::models::AbstractModel<ValueType>> result;
switch (program.getModelType()) {
case storm::prism::Program::ModelType::DTMC:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Dtmc<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
case storm::prism::Program::ModelType::CTMC:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Ctmc<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
case storm::prism::Program::ModelType::MDP:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Mdp<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
case storm::prism::Program::ModelType::CTMDP:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Ctmdp<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
default:
LOG4CPLUS_ERROR(logger, "Error while creating model from probabilistic program: cannot handle this model type.");
throw storm::exceptions::WrongFormatException() << "Error while creating model from probabilistic program: cannot handle this model type.";
break;
}
return result;
}
private:
static void unpackStateIntoEvaluator(storm::storage::BitVector const& currentState, VariableInformation const& variableInformation, storm::expressions::ExprtkExpressionEvaluator& evaluator) {
for (auto const& booleanVariable : variableInformation.booleanVariables) {
evaluator.setBooleanValue(booleanVariable.variable, currentState.get(booleanVariable.bitOffset));
}
for (auto const& integerVariable : variableInformation.integerVariables) {
evaluator.setIntegerValue(integerVariable.variable, currentState.getAsInt(integerVariable.bitOffset, integerVariable.bitWidth) + integerVariable.lowerBound);
}
}
/*!
* Applies an update to the given state and returns the resulting new state object. This methods does not
* modify the given state but returns a new one.
*
* @params state The state to which to apply the update.
* @params update The update to apply.
* @return The resulting state.
*/
static StateType applyUpdate(VariableInformation const& variableInformation, StateType const& state, storm::prism::Update const& update, storm::expressions::ExprtkExpressionEvaluator const& evaluator) {
return applyUpdate(variableInformation, state, state, update, evaluator);
}
/*!
* Applies an update to the given state and returns the resulting new state object. The update is evaluated
* over the variable values of the given base state. This methods does not modify the given state but
* returns a new one.
*
* @param state The state to which to apply the update.
* @param baseState The state used for evaluating the update.
* @param update The update to apply.
* @return The resulting state.
*/
static StateType applyUpdate(VariableInformation const& variableInformation, StateType const& state, StateType const& baseState, storm::prism::Update const& update, storm::expressions::ExprtkExpressionEvaluator const& evaluator) {
StateType newState(state);
auto assignmentIt = update.getAssignments().begin();
auto assignmentIte = update.getAssignments().end();
// Iterate over all boolean assignments and carry them out.
auto boolIt = variableInformation.booleanVariables.begin();
for (; assignmentIt != assignmentIte && assignmentIt->getExpression().hasBooleanType(); ++assignmentIt) {
while (assignmentIt->getVariable() != boolIt->variable) {
++boolIt;
}
newState.set(boolIt->bitOffset, evaluator.asBool(assignmentIt->getExpression()));
}
// Iterate over all integer assignments and carry them out.
auto integerIt = variableInformation.integerVariables.begin();
for (; assignmentIt != assignmentIte && assignmentIt->getExpression().hasIntegerType(); ++assignmentIt) {
while (assignmentIt->getVariable() != integerIt->variable) {
++integerIt;
}
newState.setFromInt(integerIt->bitOffset, integerIt->bitWidth, evaluator.asInt(assignmentIt->getExpression()) - integerIt->lowerBound);
}
// Check that we processed all assignments.
STORM_LOG_ASSERT(assignmentIt == assignmentIte, "Not all assignments were consumed.");
return newState;
}
/*!
* Retrieves the state id of the given state. If the state has not been encountered yet, it will be added to
* the lists of all states with a new id. If the state was already known, the object that is pointed to by
* the given state pointer is deleted and the old state id is returned. Note that the pointer should not be
* used after invoking this method.
*
* @param state A pointer to a state for which to retrieve the index. This must not be used after the call.
* @param stateInformation The information about the already explored part of the reachable state space.
* @return A pair indicating whether the state was already discovered before and the state id of the state.
*/
static uint32_t getOrAddStateIndex(StateType const& state, StateInformation& stateInformation, std::queue<storm::storage::BitVector>& stateQueue) {
uint32_t newIndex = stateInformation.reachableStates.size();
// Check, if the state was already registered.
std::pair<uint32_t, std::size_t> actualIndexBucketPair = stateInformation.stateToIndexMap.findOrAddAndGetBucket(state, newIndex);
if (actualIndexBucketPair.first == newIndex) {
stateQueue.push(state);
stateInformation.reachableStates.push_back(state);
}
return actualIndexBucketPair.first;
}
/*!
* Retrieves all commands that are labeled with the given label and enabled in the given state, grouped by
* modules.
*
* This function will iterate over all modules and retrieve all commands that are labeled with the given
* action and active (i.e. enabled) in the current state. The result is a list of lists of commands in which
* the inner lists contain all commands of exactly one module. If a module does not have *any* (including
* disabled) commands, there will not be a list of commands of that module in the result. If, however, the
* module has a command with a relevant label, but no enabled one, nothing is returned to indicate that there
* is no legal transition possible.
*
* @param The program in which to search for active commands.
* @param state The current state.
* @param actionIndex The index of the action label to select.
* @return A list of lists of active commands or nothing.
*/
static boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> getActiveCommandsByActionIndex(storm::prism::Program const& program,storm::expressions::ExprtkExpressionEvaluator const& evaluator, uint_fast64_t const& actionIndex) {
boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> result((std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>()));
// Iterate over all modules.
for (uint_fast64_t i = 0; i < program.getNumberOfModules(); ++i) {
storm::prism::Module const& module = program.getModule(i);
// If the module has no command labeled with the given action, we can skip this module.
if (!module.hasActionIndex(actionIndex)) {
continue;
}
std::set<uint_fast64_t> const& commandIndices = module.getCommandIndicesByActionIndex(actionIndex);
// If the module contains the action, but there is no command in the module that is labeled with
// this action, we don't have any feasible command combinations.
if (commandIndices.empty()) {
return boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>>();
}
std::vector<std::reference_wrapper<storm::prism::Command const>> commands;
// Look up commands by their indices and add them if the guard evaluates to true in the given state.
for (uint_fast64_t commandIndex : commandIndices) {
storm::prism::Command const& command = module.getCommand(commandIndex);
if (evaluator.asBool(command.getGuardExpression())) {
commands.push_back(command);
}
}
// If there was no enabled command although the module has some command with the required action label,
// we must not return anything.
if (commands.size() == 0) {
return boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>>();
}
result.get().push_back(std::move(commands));
}
return result;
}
static std::vector<Choice<ValueType>> getUnlabeledTransitions(storm::prism::Program const& program, StateInformation& stateInformation, VariableInformation const& variableInformation, storm::storage::BitVector const& currentState, storm::expressions::ExprtkExpressionEvaluator const& evaluator, std::queue<storm::storage::BitVector>& stateQueue) {
std::vector<Choice<ValueType>> result;
// Iterate over all modules.
for (uint_fast64_t i = 0; i < program.getNumberOfModules(); ++i) {
storm::prism::Module const& module = program.getModule(i);
// Iterate over all commands.
for (uint_fast64_t j = 0; j < module.getNumberOfCommands(); ++j) {
storm::prism::Command const& command = module.getCommand(j);
// Only consider unlabeled commands.
if (command.isLabeled()) continue;
// Skip the command, if it is not enabled.
if (!evaluator.asBool(command.getGuardExpression())) {
continue;
}
result.push_back(Choice<ValueType>());
Choice<ValueType>& choice = result.back();
choice.addChoiceLabel(command.getGlobalIndex());
// Iterate over all updates of the current command.
double probabilitySum = 0;
for (uint_fast64_t k = 0; k < command.getNumberOfUpdates(); ++k) {
storm::prism::Update const& update = command.getUpdate(k);
// Obtain target state index and add it to the list of known states. If it has not yet been
// seen, we also add it to the set of states that have yet to be explored.
uint32_t stateIndex = getOrAddStateIndex(applyUpdate(variableInformation, currentState, update, evaluator), stateInformation, stateQueue);
// Update the choice by adding the probability/target state to it.
ValueType probability = evaluator.asDouble(update.getLikelihoodExpression());
choice.addProbability(stateIndex, probability);
probabilitySum += probability;
}
// Check that the resulting distribution is in fact a distribution.
STORM_LOG_THROW(std::abs(1 - probabilitySum) < storm::settings::generalSettings().getPrecision(), storm::exceptions::WrongFormatException, "Probabilities do not sum to one for command '" << command << "' (actually sum to " << probabilitySum << ").");
}
}
return result;
}
static std::vector<Choice<ValueType>> getLabeledTransitions(storm::prism::Program const& program, StateInformation& stateInformation, VariableInformation const& variableInformation, storm::storage::BitVector const& currentState, storm::expressions::ExprtkExpressionEvaluator const& evaluator, std::queue<storm::storage::BitVector>& stateQueue) {
std::vector<Choice<ValueType>> result;
for (uint_fast64_t actionIndex : program.getActionIndices()) {
boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> optionalActiveCommandLists = getActiveCommandsByActionIndex(program, evaluator, actionIndex);
// Only process this action label, if there is at least one feasible solution.
if (optionalActiveCommandLists) {
std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>> const& activeCommandList = optionalActiveCommandLists.get();
std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>::const_iterator> iteratorList(activeCommandList.size());
// Initialize the list of iterators.
for (size_t i = 0; i < activeCommandList.size(); ++i) {
iteratorList[i] = activeCommandList[i].cbegin();
}
// As long as there is one feasible combination of commands, keep on expanding it.
bool done = false;
while (!done) {
std::unordered_map<StateType, ValueType>* currentTargetStates = new std::unordered_map<StateType, ValueType>();
std::unordered_map<StateType, ValueType>* newTargetStates = new std::unordered_map<StateType, ValueType>();
currentTargetStates->emplace(currentState, storm::utility::one<ValueType>());
// FIXME: This does not check whether a global variable is written multiple times. While the
// behaviour for this is undefined anyway, a warning should be issued in that case.
for (uint_fast64_t i = 0; i < iteratorList.size(); ++i) {
storm::prism::Command const& command = *iteratorList[i];
for (uint_fast64_t j = 0; j < command.getNumberOfUpdates(); ++j) {
storm::prism::Update const& update = command.getUpdate(j);
for (auto const& stateProbabilityPair : *currentTargetStates) {
// Compute the new state under the current update and add it to the set of new target states.
StateType newTargetState = applyUpdate(variableInformation, stateProbabilityPair.first, currentState, update, evaluator);
newTargetStates->emplace(newTargetState, stateProbabilityPair.second * evaluator.asDouble(update.getLikelihoodExpression()));
}
}
// If there is one more command to come, shift the target states one time step back.
if (i < iteratorList.size() - 1) {
delete currentTargetStates;
currentTargetStates = newTargetStates;
newTargetStates = new std::unordered_map<StateType, ValueType>();
}
}
// At this point, we applied all commands of the current command combination and newTargetStates
// contains all target states and their respective probabilities. That means we are now ready to
// add the choice to the list of transitions.
result.push_back(Choice<ValueType>(actionIndex));
// Now create the actual distribution.
Choice<ValueType>& choice = result.back();
// Add the labels of all commands to this choice.
for (uint_fast64_t i = 0; i < iteratorList.size(); ++i) {
choice.addChoiceLabel(iteratorList[i]->get().getGlobalIndex());
}
double probabilitySum = 0;
for (auto const& stateProbabilityPair : *newTargetStates) {
uint32_t actualIndex = getOrAddStateIndex(stateProbabilityPair.first, stateInformation, stateQueue);
choice.addProbability(actualIndex, stateProbabilityPair.second);
probabilitySum += stateProbabilityPair.second;
}
// Check that the resulting distribution is in fact a distribution.
STORM_LOG_THROW(std::abs(1 - probabilitySum) <= storm::settings::generalSettings().getPrecision(), storm::exceptions::WrongFormatException, "Sum of update probabilities do not some to one for some command (actually sum to " << probabilitySum << ").");
// Dispose of the temporary maps.
delete currentTargetStates;
delete newTargetStates;
// Now, check whether there is one more command combination to consider.
bool movedIterator = false;
for (int_fast64_t j = iteratorList.size() - 1; j >= 0; --j) {
++iteratorList[j];
if (iteratorList[j] != activeCommandList[j].end()) {
movedIterator = true;
} else {
// Reset the iterator to the beginning of the list.
iteratorList[j] = activeCommandList[j].begin();
}
}
done = !movedIterator;
}
}
}
return result;
}
/*!
* Builds the transition matrix and the transition reward matrix based for the given program.
*
* @param program The program for which to build the matrices.
* @param variableInformation A structure containing information about the variables in the program.
* @param transitionRewards A list of transition rewards that are to be considered in the transition reward
* matrix.
* @param stateInformation A structure containing information about the states of the program.
* @param deterministicModel A flag indicating whether the model is supposed to be deterministic or not.
* @param transitionMatrix A reference to an initialized matrix which is filled with all transitions by this
* function.
* @param transitionRewardMatrix A reference to an initialized matrix which is filled with all transition
* rewards by this function.
* @return A tuple containing a vector with all rows at which the nondeterministic choices of each state begin
* and a vector containing the labels associated with each choice.
*/
static std::vector<boost::container::flat_set<uint_fast64_t>> buildMatrices(storm::prism::Program const& program, VariableInformation const& variableInformation, std::vector<storm::prism::TransitionReward> const& transitionRewards, StateInformation& stateInformation, bool deterministicModel, storm::storage::SparseMatrixBuilder<ValueType>& transitionMatrixBuilder, storm::storage::SparseMatrixBuilder<ValueType>& transitionRewardMatrixBuilder) {
std::vector<boost::container::flat_set<uint_fast64_t>> choiceLabels;
// Initialize a queue and insert the initial state.
std::queue<storm::storage::BitVector> stateQueue;
StateType initialState(stateInformation.bitsPerState);
// We need to initialize the values of the variables to their initial value.
for (auto const& booleanVariable : variableInformation.booleanVariables) {
initialState.set(booleanVariable.bitOffset, booleanVariable.initialValue);
}
for (auto const& integerVariable : variableInformation.integerVariables) {
initialState.setFromInt(integerVariable.bitOffset, integerVariable.bitWidth, static_cast<uint_fast64_t>(integerVariable.initialValue - integerVariable.lowerBound));
}
// Insert the initial state in the global state to index mapping and state queue.
uint32_t stateIndex = getOrAddStateIndex(initialState, stateInformation, stateQueue);
stateInformation.initialStateIndices.push_back(stateIndex);
// Now explore the current state until there is no more reachable state.
uint_fast64_t currentRow = 0;
storm::expressions::ExprtkExpressionEvaluator evaluator(program.getManager());
while (!stateQueue.empty()) {
// Get the current state and unpack it.
storm::storage::BitVector currentState = stateQueue.front();
stateQueue.pop();
ValueType stateIndex = stateInformation.stateToIndexMap.getValue(currentState);
unpackStateIntoEvaluator(currentState, variableInformation, evaluator);
// Retrieve all choices for the current state.
std::vector<Choice<ValueType>> allUnlabeledChoices = getUnlabeledTransitions(program, stateInformation, variableInformation, currentState, evaluator, stateQueue);
std::vector<Choice<ValueType>> allLabeledChoices = getLabeledTransitions(program, stateInformation, variableInformation, currentState, evaluator, stateQueue);
uint_fast64_t totalNumberOfChoices = allUnlabeledChoices.size() + allLabeledChoices.size();
// If the current state does not have a single choice, we equip it with a self-loop if that was
// requested and issue an error otherwise.
if (totalNumberOfChoices == 0) {
if (!storm::settings::generalSettings().isDontFixDeadlocksSet()) {
// Insert empty choice labeling for added self-loop transitions.
choiceLabels.push_back(boost::container::flat_set<uint_fast64_t>());
transitionMatrixBuilder.addNextValue(currentRow, stateIndex, storm::utility::one<ValueType>());
++currentRow;
} else {
LOG4CPLUS_ERROR(logger, "Error while creating sparse matrix from probabilistic program: found deadlock state. For fixing these, please provide the appropriate option.");
throw storm::exceptions::WrongFormatException() << "Error while creating sparse matrix from probabilistic program: found deadlock state. For fixing these, please provide the appropriate option.";
}
} else {
// Then, based on whether the model is deterministic or not, either add the choices individually
// or compose them to one choice.
if (deterministicModel) {
Choice<ValueType> globalChoice;
std::map<uint32_t, ValueType> stateToRewardMap;
// Combine all the choices and scale them with the total number of choices of the current state.
for (auto const& choice : allUnlabeledChoices) {
globalChoice.addChoiceLabels(choice.getChoiceLabels());
for (auto const& stateProbabilityPair : choice) {
globalChoice.getOrAddEntry(stateProbabilityPair.first) += stateProbabilityPair.second / totalNumberOfChoices;
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (!transitionReward.isLabeled() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
}
for (auto const& choice : allLabeledChoices) {
globalChoice.addChoiceLabels(choice.getChoiceLabels());
for (auto const& stateProbabilityPair : choice) {
globalChoice.getOrAddEntry(stateProbabilityPair.first) += stateProbabilityPair.second / totalNumberOfChoices;
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (transitionReward.getActionIndex() == choice.getActionIndex() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
}
// Now add the resulting distribution as the only choice of the current state.
choiceLabels.push_back(globalChoice.getChoiceLabels());
for (auto const& stateProbabilityPair : globalChoice) {
transitionMatrixBuilder.addNextValue(currentRow, stateProbabilityPair.first, stateProbabilityPair.second);
}
// Add all transition rewards to the matrix and add dummy entry if there is none.
if (stateToRewardMap.size() > 0) {
for (auto const& stateRewardPair : stateToRewardMap) {
transitionRewardMatrixBuilder.addNextValue(currentRow, stateRewardPair.first, stateRewardPair.second);
}
}
++currentRow;
} else {
// If the model is nondeterministic, we add all choices individually.
transitionMatrixBuilder.newRowGroup(currentRow);
transitionRewardMatrixBuilder.newRowGroup(currentRow);
// First, process all unlabeled choices.
for (auto const& choice : allUnlabeledChoices) {
std::map<uint_fast64_t, ValueType> stateToRewardMap;
choiceLabels.emplace_back(std::move(choice.getChoiceLabels()));
for (auto const& stateProbabilityPair : choice) {
transitionMatrixBuilder.addNextValue(currentRow, stateProbabilityPair.first, stateProbabilityPair.second);
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (!transitionReward.isLabeled() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
// Add all transition rewards to the matrix and add dummy entry if there is none.
if (stateToRewardMap.size() > 0) {
for (auto const& stateRewardPair : stateToRewardMap) {
transitionRewardMatrixBuilder.addNextValue(currentRow, stateRewardPair.first, stateRewardPair.second);
}
}
++currentRow;
}
// Then, process all labeled choices.
for (auto const& choice : allLabeledChoices) {
std::map<uint_fast64_t, ValueType> stateToRewardMap;
choiceLabels.emplace_back(std::move(choice.getChoiceLabels()));
for (auto const& stateProbabilityPair : choice) {
transitionMatrixBuilder.addNextValue(currentRow, stateProbabilityPair.first, stateProbabilityPair.second);
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (transitionReward.getActionIndex() == choice.getActionIndex() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
// Add all transition rewards to the matrix and add dummy entry if there is none.
if (stateToRewardMap.size() > 0) {
for (auto const& stateRewardPair : stateToRewardMap) {
transitionRewardMatrixBuilder.addNextValue(currentRow, stateRewardPair.first, stateRewardPair.second);
}
}
++currentRow;
}
}
}
}
return choiceLabels;
}
/*!
* Explores the state space of the given program and returns the components of the model as a result.
*
* @param program The program whose state space to explore.
* @param rewardModel The reward model that is to be considered.
* @return A structure containing the components of the resulting model.
*/
static ModelComponents buildModelComponents(storm::prism::Program const& program, storm::prism::RewardModel const& rewardModel) {
ModelComponents modelComponents;
uint_fast64_t bitOffset = 0;
VariableInformation variableInformation;
for (auto const& booleanVariable : program.getGlobalBooleanVariables()) {
variableInformation.booleanVariables.emplace_back(booleanVariable.getExpressionVariable(), booleanVariable.getInitialValueExpression().evaluateAsBool(), bitOffset);
++bitOffset;
variableInformation.booleanVariableToIndexMap[booleanVariable.getExpressionVariable()] = variableInformation.booleanVariables.size() - 1;
}
for (auto const& integerVariable : program.getGlobalIntegerVariables()) {
int_fast64_t lowerBound = integerVariable.getLowerBoundExpression().evaluateAsInt();
int_fast64_t upperBound = integerVariable.getUpperBoundExpression().evaluateAsInt();
uint_fast64_t bitwidth = static_cast<uint_fast64_t>(std::ceil(std::log2(upperBound - lowerBound + 1)));
variableInformation.integerVariables.emplace_back(integerVariable.getExpressionVariable(), integerVariable.getInitialValueExpression().evaluateAsInt(), lowerBound, upperBound, bitOffset, bitwidth);
bitOffset += bitwidth;
variableInformation.integerVariableToIndexMap[integerVariable.getExpressionVariable()] = variableInformation.integerVariables.size() - 1;
}
for (auto const& module : program.getModules()) {
for (auto const& booleanVariable : module.getBooleanVariables()) {
variableInformation.booleanVariables.emplace_back(booleanVariable.getExpressionVariable(), booleanVariable.getInitialValueExpression().evaluateAsBool(), bitOffset);
++bitOffset;
variableInformation.booleanVariableToIndexMap[booleanVariable.getExpressionVariable()] = variableInformation.booleanVariables.size() - 1;
}
for (auto const& integerVariable : module.getIntegerVariables()) {
int_fast64_t lowerBound = integerVariable.getLowerBoundExpression().evaluateAsInt();
int_fast64_t upperBound = integerVariable.getUpperBoundExpression().evaluateAsInt();
uint_fast64_t bitwidth = static_cast<uint_fast64_t>(std::ceil(std::log2(upperBound - lowerBound + 1)));
variableInformation.integerVariables.emplace_back(integerVariable.getExpressionVariable(), integerVariable.getInitialValueExpression().evaluateAsInt(), lowerBound, upperBound, bitOffset, bitwidth);
bitOffset += bitwidth;
variableInformation.integerVariableToIndexMap[integerVariable.getExpressionVariable()] = variableInformation.integerVariables.size() - 1;
}
}
// Create the structure for storing the reachable state space.
uint64_t bitsPerState = ((bitOffset / 64) + 1) * 64;
StateInformation stateInformation(bitsPerState);
// Determine whether we have to combine different choices to one or whether this model can have more than
// one choice per state.
bool deterministicModel = program.getModelType() == storm::prism::Program::ModelType::DTMC || program.getModelType() == storm::prism::Program::ModelType::CTMC;
// Build the transition and reward matrices.
storm::storage::SparseMatrixBuilder<ValueType> transitionMatrixBuilder(0, 0, 0, false, !deterministicModel, 0);
storm::storage::SparseMatrixBuilder<ValueType> transitionRewardMatrixBuilder(0, 0, 0, false, !deterministicModel, 0);
modelComponents.choiceLabeling = buildMatrices(program, variableInformation, rewardModel.getTransitionRewards(), stateInformation, deterministicModel, transitionMatrixBuilder, transitionRewardMatrixBuilder);
// Finalize the resulting matrices.
modelComponents.transitionMatrix = transitionMatrixBuilder.build();
modelComponents.transitionRewardMatrix = transitionRewardMatrixBuilder.build(modelComponents.transitionMatrix.getRowCount(), modelComponents.transitionMatrix.getColumnCount(), modelComponents.transitionMatrix.getRowGroupCount());
// Now build the state labeling.
modelComponents.stateLabeling = buildStateLabeling(program, variableInformation, stateInformation);
// Finally, construct the state rewards.
modelComponents.stateRewards = buildStateRewards(program, variableInformation, rewardModel.getStateRewards(), stateInformation);
return modelComponents;
}
/*!
* Builds the state labeling for the given program.
*
* @param program The program for which to build the state labeling.
* @param variableInformation Information about the variables in the program.
* @param stateInformation Information about the state space of the program.
* @return The state labeling of the given program.
*/
static storm::models::AtomicPropositionsLabeling buildStateLabeling(storm::prism::Program const& program, VariableInformation const& variableInformation, StateInformation const& stateInformation) {
storm::expressions::ExprtkExpressionEvaluator evaluator(program.getManager());
std::vector<storm::prism::Label> const& labels = program.getLabels();
storm::models::AtomicPropositionsLabeling result(stateInformation.reachableStates.size(), labels.size() + 1);
// Initialize labeling.
for (auto const& label : labels) {
result.addAtomicProposition(label.getName());
}
for (uint_fast64_t index = 0; index < stateInformation.reachableStates.size(); index++) {
unpackStateIntoEvaluator(stateInformation.reachableStates[index], variableInformation, evaluator);
for (auto const& label : labels) {
// Add label to state, if the corresponding expression is true.
if (evaluator.asBool(label.getStatePredicateExpression())) {
result.addAtomicPropositionToState(label.getName(), index);
}
}
}
// Also label the initial state with the special label "init".
result.addAtomicProposition("init");
for (auto index : stateInformation.initialStateIndices) {
result.addAtomicPropositionToState("init", index);
}
return result;
}
/*!
* Builds the state rewards for the given state space.
*
* @param rewards A vector of state rewards to consider.
* @param stateInformation Information about the state space.
* @return A vector containing the state rewards for the state space.
*/
static std::vector<ValueType> buildStateRewards(storm::prism::Program const& program, VariableInformation const& variableInformation, std::vector<storm::prism::StateReward> const& rewards, StateInformation const& stateInformation) {
storm::expressions::ExprtkExpressionEvaluator evaluator(program.getManager());
std::vector<ValueType> result(stateInformation.reachableStates.size());
for (uint_fast64_t index = 0; index < stateInformation.reachableStates.size(); index++) {
result[index] = storm::utility::zero<ValueType>();
unpackStateIntoEvaluator(stateInformation.reachableStates[index], variableInformation, evaluator);
for (auto const& reward : rewards) {
// Add this reward to the state if the state is included in the state reward.
if (evaluator.asBool(reward.getStatePredicateExpression())) {
result[index] += ValueType(evaluator.asDouble(reward.getRewardValueExpression()));
}
}
}
return result;
}
};
} // namespace adapters
} // namespace storm
#endif /* STORM_ADAPTERS_EXPLICITMODELADAPTER_H */

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#include "src/builder/ExplicitPrismModelBuilder.h"
namespace storm {
namespace builder {
template <typename ValueType, typename IndexType>
ExplicitPrismModelBuilder<ValueType, IndexType>::StateInformation::StateInformation(uint64_t bitsPerState) : stateStorage(bitsPerState, 1000000), bitsPerState(bitsPerState), reachableStates() {
// Intentionally left empty.
}
template <typename ValueType, typename IndexType>
ExplicitPrismModelBuilder<ValueType, IndexType>::VariableInformation::BooleanVariableInformation::BooleanVariableInformation(storm::expressions::Variable const& variable, bool initialValue, uint_fast64_t bitOffset) : variable(variable), initialValue(initialValue), bitOffset(bitOffset) {
// Intentionally left empty.
}
template <typename ValueType, typename IndexType>
ExplicitPrismModelBuilder<ValueType, IndexType>::VariableInformation::IntegerVariableInformation::IntegerVariableInformation(storm::expressions::Variable const& variable, int_fast64_t initialValue, int_fast64_t lowerBound, int_fast64_t upperBound, uint_fast64_t bitOffset, uint_fast64_t bitWidth) : variable(variable), initialValue(initialValue), lowerBound(lowerBound), upperBound(upperBound), bitOffset(bitOffset), bitWidth(bitWidth) {
// Intentionally left empty.
}
template <typename ValueType, typename IndexType>
uint_fast64_t ExplicitPrismModelBuilder<ValueType, IndexType>::VariableInformation::getBitOffset(storm::expressions::Variable const& variable) const {
auto const& booleanIndex = booleanVariableToIndexMap.find(variable);
if (booleanIndex != booleanVariableToIndexMap.end()) {
return booleanVariables[booleanIndex].bitOffset;
}
auto const& integerIndex = integerVariableToIndexMap.find(variable);
if (integerIndex != integerVariableToIndexMap.end()) {
return integerVariables[integerIndex].bitOffset;
}
STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Cannot look-up bit index of unknown variable.");
}
template <typename ValueType, typename IndexType>
uint_fast64_t ExplicitPrismModelBuilder<ValueType, IndexType>::VariableInformation::getBitWidth(storm::expressions::Variable const& variable) const {
auto const& integerIndex = integerVariableToIndexMap.find(variable);
if (integerIndex != integerVariableToIndexMap.end()) {
return integerVariables[integerIndex].bitWidth;
}
STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Cannot look-up bit width of unknown variable.");
}
template <typename ValueType, typename IndexType>
ExplicitPrismModelBuilder<ValueType, IndexType>::ModelComponents::ModelComponents() : transitionMatrix(), stateLabeling(), stateRewards(), transitionRewardMatrix(), choiceLabeling() {
// Intentionally left empty.
}
template <typename ValueType, typename IndexType>
std::unique_ptr<storm::models::AbstractModel<ValueType>> ExplicitPrismModelBuilder<ValueType, IndexType>::translateProgram(storm::prism::Program program, bool rewards, std::string const& rewardModelName, std::string const& constantDefinitionString) {
// Start by defining the undefined constants in the model.
// First, we need to parse the constant definition string.
std::map<storm::expressions::Variable, storm::expressions::Expression> constantDefinitions = storm::utility::prism::parseConstantDefinitionString(program, constantDefinitionString);
storm::prism::Program preparedProgram = program.defineUndefinedConstants(constantDefinitions);
STORM_LOG_THROW(!preparedProgram.hasUndefinedConstants(), storm::exceptions::InvalidArgumentException, "Program still contains undefined constants.");
// Now that we have defined all the constants in the program, we need to substitute their appearances in
// 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 rewardModel = storm::prism::RewardModel();
// Select the appropriate reward model.
if (rewards) {
// If a specific reward model was selected or one with the empty name exists, select it.
if (rewardModelName != "" || preparedProgram.hasRewardModel(rewardModelName)) {
rewardModel = preparedProgram.getRewardModel(rewardModelName);
} else if (preparedProgram.hasRewardModel()) {
// Otherwise, we select the first one.
rewardModel = preparedProgram.getRewardModel(0);
}
}
ModelComponents modelComponents = buildModelComponents(preparedProgram, rewardModel);
std::unique_ptr<storm::models::AbstractModel<ValueType>> result;
switch (program.getModelType()) {
case storm::prism::Program::ModelType::DTMC:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Dtmc<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
case storm::prism::Program::ModelType::CTMC:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Ctmc<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
case storm::prism::Program::ModelType::MDP:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Mdp<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
case storm::prism::Program::ModelType::CTMDP:
result = std::unique_ptr<storm::models::AbstractModel<ValueType>>(new storm::models::Ctmdp<ValueType>(std::move(modelComponents.transitionMatrix), std::move(modelComponents.stateLabeling), rewardModel.hasStateRewards() ? std::move(modelComponents.stateRewards) : boost::optional<std::vector<ValueType>>(), rewardModel.hasTransitionRewards() ? std::move(modelComponents.transitionRewardMatrix) : boost::optional<storm::storage::SparseMatrix<ValueType>>(), std::move(modelComponents.choiceLabeling)));
break;
default:
LOG4CPLUS_ERROR(logger, "Error while creating model from probabilistic program: cannot handle this model type.");
throw storm::exceptions::WrongFormatException() << "Error while creating model from probabilistic program: cannot handle this model type.";
break;
}
return result;
}
template <typename ValueType, typename IndexType>
void ExplicitPrismModelBuilder<ValueType, IndexType>::unpackStateIntoEvaluator(storm::storage::BitVector const& currentState, VariableInformation const& variableInformation, storm::expressions::ExprtkExpressionEvaluator& evaluator) {
for (auto const& booleanVariable : variableInformation.booleanVariables) {
evaluator.setBooleanValue(booleanVariable.variable, currentState.get(booleanVariable.bitOffset));
}
for (auto const& integerVariable : variableInformation.integerVariables) {
evaluator.setIntegerValue(integerVariable.variable, currentState.getAsInt(integerVariable.bitOffset, integerVariable.bitWidth) + integerVariable.lowerBound);
}
}
template <typename ValueType, typename IndexType>
typename ExplicitPrismModelBuilder<ValueType, IndexType>::CompressedState ExplicitPrismModelBuilder<ValueType, IndexType>::applyUpdate(VariableInformation const& variableInformation, CompressedState const& state, storm::prism::Update const& update, storm::expressions::ExprtkExpressionEvaluator const& evaluator) {
return applyUpdate(variableInformation, state, state, update, evaluator);
}
template <typename ValueType, typename IndexType>
typename ExplicitPrismModelBuilder<ValueType, IndexType>::CompressedState ExplicitPrismModelBuilder<ValueType, IndexType>::applyUpdate(VariableInformation const& variableInformation, CompressedState const& state, CompressedState const& baseState, storm::prism::Update const& update, storm::expressions::ExprtkExpressionEvaluator const& evaluator) {
CompressedState newState(state);
auto assignmentIt = update.getAssignments().begin();
auto assignmentIte = update.getAssignments().end();
// Iterate over all boolean assignments and carry them out.
auto boolIt = variableInformation.booleanVariables.begin();
for (; assignmentIt != assignmentIte && assignmentIt->getExpression().hasBooleanType(); ++assignmentIt) {
while (assignmentIt->getVariable() != boolIt->variable) {
++boolIt;
}
newState.set(boolIt->bitOffset, evaluator.asBool(assignmentIt->getExpression()));
}
// Iterate over all integer assignments and carry them out.
auto integerIt = variableInformation.integerVariables.begin();
for (; assignmentIt != assignmentIte && assignmentIt->getExpression().hasIntegerType(); ++assignmentIt) {
while (assignmentIt->getVariable() != integerIt->variable) {
++integerIt;
}
newState.setFromInt(integerIt->bitOffset, integerIt->bitWidth, evaluator.asInt(assignmentIt->getExpression()) - integerIt->lowerBound);
}
// Check that we processed all assignments.
STORM_LOG_ASSERT(assignmentIt == assignmentIte, "Not all assignments were consumed.");
return newState;
}
template <typename ValueType, typename IndexType>
IndexType ExplicitPrismModelBuilder<ValueType, IndexType>::getOrAddStateIndex(CompressedState const& state, StateInformation& stateInformation, std::queue<storm::storage::BitVector>& stateQueue) {
uint32_t newIndex = stateInformation.reachableStates.size();
// Check, if the state was already registered.
std::pair<uint32_t, std::size_t> actualIndexBucketPair = stateInformation.stateStorage.findOrAddAndGetBucket(state, newIndex);
if (actualIndexBucketPair.first == newIndex) {
stateQueue.push(state);
stateInformation.reachableStates.push_back(state);
}
return actualIndexBucketPair.first;
}
template <typename ValueType, typename IndexType>
boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> ExplicitPrismModelBuilder<ValueType, IndexType>::getActiveCommandsByActionIndex(storm::prism::Program const& program,storm::expressions::ExprtkExpressionEvaluator const& evaluator, uint_fast64_t const& actionIndex) {
boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> result((std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>()));
// Iterate over all modules.
for (uint_fast64_t i = 0; i < program.getNumberOfModules(); ++i) {
storm::prism::Module const& module = program.getModule(i);
// If the module has no command labeled with the given action, we can skip this module.
if (!module.hasActionIndex(actionIndex)) {
continue;
}
std::set<uint_fast64_t> const& commandIndices = module.getCommandIndicesByActionIndex(actionIndex);
// If the module contains the action, but there is no command in the module that is labeled with
// this action, we don't have any feasible command combinations.
if (commandIndices.empty()) {
return boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>>();
}
std::vector<std::reference_wrapper<storm::prism::Command const>> commands;
// Look up commands by their indices and add them if the guard evaluates to true in the given state.
for (uint_fast64_t commandIndex : commandIndices) {
storm::prism::Command const& command = module.getCommand(commandIndex);
if (evaluator.asBool(command.getGuardExpression())) {
commands.push_back(command);
}
}
// If there was no enabled command although the module has some command with the required action label,
// we must not return anything.
if (commands.size() == 0) {
return boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>>();
}
result.get().push_back(std::move(commands));
}
return result;
}
template <typename ValueType, typename IndexType>
static std::vector<Choice<ValueType>> ExplicitPrismModelBuilder<ValueType, IndexType>::getUnlabeledTransitions(storm::prism::Program const& program, StateInformation& stateInformation, VariableInformation const& variableInformation, storm::storage::BitVector const& currentState, storm::expressions::ExprtkExpressionEvaluator const& evaluator, std::queue<storm::storage::BitVector>& stateQueue) {
std::vector<Choice<ValueType>> result;
// Iterate over all modules.
for (uint_fast64_t i = 0; i < program.getNumberOfModules(); ++i) {
storm::prism::Module const& module = program.getModule(i);
// Iterate over all commands.
for (uint_fast64_t j = 0; j < module.getNumberOfCommands(); ++j) {
storm::prism::Command const& command = module.getCommand(j);
// Only consider unlabeled commands.
if (command.isLabeled()) continue;
// Skip the command, if it is not enabled.
if (!evaluator.asBool(command.getGuardExpression())) {
continue;
}
result.push_back(Choice<ValueType>());
Choice<ValueType>& choice = result.back();
choice.addChoiceLabel(command.getGlobalIndex());
// Iterate over all updates of the current command.
double probabilitySum = 0;
for (uint_fast64_t k = 0; k < command.getNumberOfUpdates(); ++k) {
storm::prism::Update const& update = command.getUpdate(k);
// Obtain target state index and add it to the list of known states. If it has not yet been
// seen, we also add it to the set of states that have yet to be explored.
uint32_t stateIndex = getOrAddStateIndex(applyUpdate(variableInformation, currentState, update, evaluator), stateInformation, stateQueue);
// Update the choice by adding the probability/target state to it.
ValueType probability = evaluator.asDouble(update.getLikelihoodExpression());
choice.addProbability(stateIndex, probability);
probabilitySum += probability;
}
// Check that the resulting distribution is in fact a distribution.
STORM_LOG_THROW(std::abs(1 - probabilitySum) < storm::settings::generalSettings().getPrecision(), storm::exceptions::WrongFormatException, "Probabilities do not sum to one for command '" << command << "' (actually sum to " << probabilitySum << ").");
}
}
return result;
}
static std::vector<Choice<ValueType>> getLabeledTransitions(storm::prism::Program const& program, StateInformation& stateInformation, VariableInformation const& variableInformation, storm::storage::BitVector const& currentState, storm::expressions::ExprtkExpressionEvaluator const& evaluator, std::queue<storm::storage::BitVector>& stateQueue) {
std::vector<Choice<ValueType>> result;
for (uint_fast64_t actionIndex : program.getActionIndices()) {
boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> optionalActiveCommandLists = getActiveCommandsByActionIndex(program, evaluator, actionIndex);
// Only process this action label, if there is at least one feasible solution.
if (optionalActiveCommandLists) {
std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>> const& activeCommandList = optionalActiveCommandLists.get();
std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>::const_iterator> iteratorList(activeCommandList.size());
// Initialize the list of iterators.
for (size_t i = 0; i < activeCommandList.size(); ++i) {
iteratorList[i] = activeCommandList[i].cbegin();
}
// As long as there is one feasible combination of commands, keep on expanding it.
bool done = false;
while (!done) {
std::unordered_map<CompressedState, ValueType>* currentTargetStates = new std::unordered_map<CompressedState, ValueType>();
std::unordered_map<CompressedState, ValueType>* newTargetStates = new std::unordered_map<CompressedState, ValueType>();
currentTargetStates->emplace(currentState, storm::utility::one<ValueType>());
// FIXME: This does not check whether a global variable is written multiple times. While the
// behaviour for this is undefined anyway, a warning should be issued in that case.
for (uint_fast64_t i = 0; i < iteratorList.size(); ++i) {
storm::prism::Command const& command = *iteratorList[i];
for (uint_fast64_t j = 0; j < command.getNumberOfUpdates(); ++j) {
storm::prism::Update const& update = command.getUpdate(j);
for (auto const& stateProbabilityPair : *currentTargetStates) {
// Compute the new state under the current update and add it to the set of new target states.
CompressedState newTargetState = applyUpdate(variableInformation, stateProbabilityPair.first, currentState, update, evaluator);
newTargetStates->emplace(newTargetState, stateProbabilityPair.second * evaluator.asDouble(update.getLikelihoodExpression()));
}
}
// If there is one more command to come, shift the target states one time step back.
if (i < iteratorList.size() - 1) {
delete currentTargetStates;
currentTargetStates = newTargetStates;
newTargetStates = new std::unordered_map<CompressedState, ValueType>();
}
}
// At this point, we applied all commands of the current command combination and newTargetStates
// contains all target states and their respective probabilities. That means we are now ready to
// add the choice to the list of transitions.
result.push_back(Choice<ValueType>(actionIndex));
// Now create the actual distribution.
Choice<ValueType>& choice = result.back();
// Add the labels of all commands to this choice.
for (uint_fast64_t i = 0; i < iteratorList.size(); ++i) {
choice.addChoiceLabel(iteratorList[i]->get().getGlobalIndex());
}
double probabilitySum = 0;
for (auto const& stateProbabilityPair : *newTargetStates) {
uint32_t actualIndex = getOrAddStateIndex(stateProbabilityPair.first, stateInformation, stateQueue);
choice.addProbability(actualIndex, stateProbabilityPair.second);
probabilitySum += stateProbabilityPair.second;
}
// Check that the resulting distribution is in fact a distribution.
STORM_LOG_THROW(std::abs(1 - probabilitySum) <= storm::settings::generalSettings().getPrecision(), storm::exceptions::WrongFormatException, "Sum of update probabilities do not some to one for some command (actually sum to " << probabilitySum << ").");
// Dispose of the temporary maps.
delete currentTargetStates;
delete newTargetStates;
// Now, check whether there is one more command combination to consider.
bool movedIterator = false;
for (int_fast64_t j = iteratorList.size() - 1; j >= 0; --j) {
++iteratorList[j];
if (iteratorList[j] != activeCommandList[j].end()) {
movedIterator = true;
} else {
// Reset the iterator to the beginning of the list.
iteratorList[j] = activeCommandList[j].begin();
}
}
done = !movedIterator;
}
}
}
return result;
}
static std::vector<boost::container::flat_set<uint_fast64_t>> buildMatrices(storm::prism::Program const& program, VariableInformation const& variableInformation, std::vector<storm::prism::TransitionReward> const& transitionRewards, StateInformation& stateInformation, bool deterministicModel, storm::storage::SparseMatrixBuilder<ValueType>& transitionMatrixBuilder, storm::storage::SparseMatrixBuilder<ValueType>& transitionRewardMatrixBuilder) {
std::vector<boost::container::flat_set<uint_fast64_t>> choiceLabels;
// Initialize a queue and insert the initial state.
std::queue<storm::storage::BitVector> stateQueue;
CompressedState initialState(stateInformation.bitsPerState);
// We need to initialize the values of the variables to their initial value.
for (auto const& booleanVariable : variableInformation.booleanVariables) {
initialState.set(booleanVariable.bitOffset, booleanVariable.initialValue);
}
for (auto const& integerVariable : variableInformation.integerVariables) {
initialState.setFromInt(integerVariable.bitOffset, integerVariable.bitWidth, static_cast<uint_fast64_t>(integerVariable.initialValue - integerVariable.lowerBound));
}
// Insert the initial state in the global state to index mapping and state queue.
uint32_t stateIndex = getOrAddStateIndex(initialState, stateInformation, stateQueue);
stateInformation.initialStateIndices.push_back(stateIndex);
// Now explore the current state until there is no more reachable state.
uint_fast64_t currentRow = 0;
storm::expressions::ExprtkExpressionEvaluator evaluator(program.getManager());
while (!stateQueue.empty()) {
// Get the current state and unpack it.
storm::storage::BitVector currentState = stateQueue.front();
stateQueue.pop();
ValueType stateIndex = stateInformation.stateToIndexMap.getValue(currentState);
unpackStateIntoEvaluator(currentState, variableInformation, evaluator);
// Retrieve all choices for the current state.
std::vector<Choice<ValueType>> allUnlabeledChoices = getUnlabeledTransitions(program, stateInformation, variableInformation, currentState, evaluator, stateQueue);
std::vector<Choice<ValueType>> allLabeledChoices = getLabeledTransitions(program, stateInformation, variableInformation, currentState, evaluator, stateQueue);
uint_fast64_t totalNumberOfChoices = allUnlabeledChoices.size() + allLabeledChoices.size();
// If the current state does not have a single choice, we equip it with a self-loop if that was
// requested and issue an error otherwise.
if (totalNumberOfChoices == 0) {
if (!storm::settings::generalSettings().isDontFixDeadlocksSet()) {
// Insert empty choice labeling for added self-loop transitions.
choiceLabels.push_back(boost::container::flat_set<uint_fast64_t>());
transitionMatrixBuilder.addNextValue(currentRow, stateIndex, storm::utility::one<ValueType>());
++currentRow;
} else {
LOG4CPLUS_ERROR(logger, "Error while creating sparse matrix from probabilistic program: found deadlock state. For fixing these, please provide the appropriate option.");
throw storm::exceptions::WrongFormatException() << "Error while creating sparse matrix from probabilistic program: found deadlock state. For fixing these, please provide the appropriate option.";
}
} else {
// Then, based on whether the model is deterministic or not, either add the choices individually
// or compose them to one choice.
if (deterministicModel) {
Choice<ValueType> globalChoice;
std::map<uint32_t, ValueType> stateToRewardMap;
// Combine all the choices and scale them with the total number of choices of the current state.
for (auto const& choice : allUnlabeledChoices) {
globalChoice.addChoiceLabels(choice.getChoiceLabels());
for (auto const& stateProbabilityPair : choice) {
globalChoice.getOrAddEntry(stateProbabilityPair.first) += stateProbabilityPair.second / totalNumberOfChoices;
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (!transitionReward.isLabeled() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
}
for (auto const& choice : allLabeledChoices) {
globalChoice.addChoiceLabels(choice.getChoiceLabels());
for (auto const& stateProbabilityPair : choice) {
globalChoice.getOrAddEntry(stateProbabilityPair.first) += stateProbabilityPair.second / totalNumberOfChoices;
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (transitionReward.getActionIndex() == choice.getActionIndex() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
}
// Now add the resulting distribution as the only choice of the current state.
choiceLabels.push_back(globalChoice.getChoiceLabels());
for (auto const& stateProbabilityPair : globalChoice) {
transitionMatrixBuilder.addNextValue(currentRow, stateProbabilityPair.first, stateProbabilityPair.second);
}
// Add all transition rewards to the matrix and add dummy entry if there is none.
if (stateToRewardMap.size() > 0) {
for (auto const& stateRewardPair : stateToRewardMap) {
transitionRewardMatrixBuilder.addNextValue(currentRow, stateRewardPair.first, stateRewardPair.second);
}
}
++currentRow;
} else {
// If the model is nondeterministic, we add all choices individually.
transitionMatrixBuilder.newRowGroup(currentRow);
transitionRewardMatrixBuilder.newRowGroup(currentRow);
// First, process all unlabeled choices.
for (auto const& choice : allUnlabeledChoices) {
std::map<uint_fast64_t, ValueType> stateToRewardMap;
choiceLabels.emplace_back(std::move(choice.getChoiceLabels()));
for (auto const& stateProbabilityPair : choice) {
transitionMatrixBuilder.addNextValue(currentRow, stateProbabilityPair.first, stateProbabilityPair.second);
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (!transitionReward.isLabeled() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
// Add all transition rewards to the matrix and add dummy entry if there is none.
if (stateToRewardMap.size() > 0) {
for (auto const& stateRewardPair : stateToRewardMap) {
transitionRewardMatrixBuilder.addNextValue(currentRow, stateRewardPair.first, stateRewardPair.second);
}
}
++currentRow;
}
// Then, process all labeled choices.
for (auto const& choice : allLabeledChoices) {
std::map<uint_fast64_t, ValueType> stateToRewardMap;
choiceLabels.emplace_back(std::move(choice.getChoiceLabels()));
for (auto const& stateProbabilityPair : choice) {
transitionMatrixBuilder.addNextValue(currentRow, stateProbabilityPair.first, stateProbabilityPair.second);
// Now add all rewards that match this choice.
for (auto const& transitionReward : transitionRewards) {
if (transitionReward.getActionIndex() == choice.getActionIndex() && evaluator.asBool(transitionReward.getStatePredicateExpression())) {
stateToRewardMap[stateProbabilityPair.first] += ValueType(evaluator.asDouble(transitionReward.getRewardValueExpression()));
}
}
}
// Add all transition rewards to the matrix and add dummy entry if there is none.
if (stateToRewardMap.size() > 0) {
for (auto const& stateRewardPair : stateToRewardMap) {
transitionRewardMatrixBuilder.addNextValue(currentRow, stateRewardPair.first, stateRewardPair.second);
}
}
++currentRow;
}
}
}
}
return choiceLabels;
}
static ModelComponents buildModelComponents(storm::prism::Program const& program, storm::prism::RewardModel const& rewardModel) {
ModelComponents modelComponents;
uint_fast64_t bitOffset = 0;
VariableInformation variableInformation;
for (auto const& booleanVariable : program.getGlobalBooleanVariables()) {
variableInformation.booleanVariables.emplace_back(booleanVariable.getExpressionVariable(), booleanVariable.getInitialValueExpression().evaluateAsBool(), bitOffset);
++bitOffset;
variableInformation.booleanVariableToIndexMap[booleanVariable.getExpressionVariable()] = variableInformation.booleanVariables.size() - 1;
}
for (auto const& integerVariable : program.getGlobalIntegerVariables()) {
int_fast64_t lowerBound = integerVariable.getLowerBoundExpression().evaluateAsInt();
int_fast64_t upperBound = integerVariable.getUpperBoundExpression().evaluateAsInt();
uint_fast64_t bitwidth = static_cast<uint_fast64_t>(std::ceil(std::log2(upperBound - lowerBound + 1)));
variableInformation.integerVariables.emplace_back(integerVariable.getExpressionVariable(), integerVariable.getInitialValueExpression().evaluateAsInt(), lowerBound, upperBound, bitOffset, bitwidth);
bitOffset += bitwidth;
variableInformation.integerVariableToIndexMap[integerVariable.getExpressionVariable()] = variableInformation.integerVariables.size() - 1;
}
for (auto const& module : program.getModules()) {
for (auto const& booleanVariable : module.getBooleanVariables()) {
variableInformation.booleanVariables.emplace_back(booleanVariable.getExpressionVariable(), booleanVariable.getInitialValueExpression().evaluateAsBool(), bitOffset);
++bitOffset;
variableInformation.booleanVariableToIndexMap[booleanVariable.getExpressionVariable()] = variableInformation.booleanVariables.size() - 1;
}
for (auto const& integerVariable : module.getIntegerVariables()) {
int_fast64_t lowerBound = integerVariable.getLowerBoundExpression().evaluateAsInt();
int_fast64_t upperBound = integerVariable.getUpperBoundExpression().evaluateAsInt();
uint_fast64_t bitwidth = static_cast<uint_fast64_t>(std::ceil(std::log2(upperBound - lowerBound + 1)));
variableInformation.integerVariables.emplace_back(integerVariable.getExpressionVariable(), integerVariable.getInitialValueExpression().evaluateAsInt(), lowerBound, upperBound, bitOffset, bitwidth);
bitOffset += bitwidth;
variableInformation.integerVariableToIndexMap[integerVariable.getExpressionVariable()] = variableInformation.integerVariables.size() - 1;
}
}
// Create the structure for storing the reachable state space.
uint64_t bitsPerState = ((bitOffset / 64) + 1) * 64;
StateInformation stateInformation(bitsPerState);
// Determine whether we have to combine different choices to one or whether this model can have more than
// one choice per state.
bool deterministicModel = program.getModelType() == storm::prism::Program::ModelType::DTMC || program.getModelType() == storm::prism::Program::ModelType::CTMC;
// Build the transition and reward matrices.
storm::storage::SparseMatrixBuilder<ValueType> transitionMatrixBuilder(0, 0, 0, false, !deterministicModel, 0);
storm::storage::SparseMatrixBuilder<ValueType> transitionRewardMatrixBuilder(0, 0, 0, false, !deterministicModel, 0);
modelComponents.choiceLabeling = buildMatrices(program, variableInformation, rewardModel.getTransitionRewards(), stateInformation, deterministicModel, transitionMatrixBuilder, transitionRewardMatrixBuilder);
// Finalize the resulting matrices.
modelComponents.transitionMatrix = transitionMatrixBuilder.build();
modelComponents.transitionRewardMatrix = transitionRewardMatrixBuilder.build(modelComponents.transitionMatrix.getRowCount(), modelComponents.transitionMatrix.getColumnCount(), modelComponents.transitionMatrix.getRowGroupCount());
// Now build the state labeling.
modelComponents.stateLabeling = buildStateLabeling(program, variableInformation, stateInformation);
// Finally, construct the state rewards.
modelComponents.stateRewards = buildStateRewards(program, variableInformation, rewardModel.getStateRewards(), stateInformation);
return modelComponents;
}
static storm::models::AtomicPropositionsLabeling buildStateLabeling(storm::prism::Program const& program, VariableInformation const& variableInformation, StateInformation const& stateInformation) {
storm::expressions::ExprtkExpressionEvaluator evaluator(program.getManager());
std::vector<storm::prism::Label> const& labels = program.getLabels();
storm::models::AtomicPropositionsLabeling result(stateInformation.reachableStates.size(), labels.size() + 1);
// Initialize labeling.
for (auto const& label : labels) {
result.addAtomicProposition(label.getName());
}
for (uint_fast64_t index = 0; index < stateInformation.reachableStates.size(); index++) {
unpackStateIntoEvaluator(stateInformation.reachableStates[index], variableInformation, evaluator);
for (auto const& label : labels) {
// Add label to state, if the corresponding expression is true.
if (evaluator.asBool(label.getStatePredicateExpression())) {
result.addAtomicPropositionToState(label.getName(), index);
}
}
}
// Also label the initial state with the special label "init".
result.addAtomicProposition("init");
for (auto index : stateInformation.initialStateIndices) {
result.addAtomicPropositionToState("init", index);
}
return result;
}
static std::vector<ValueType> buildStateRewards(storm::prism::Program const& program, VariableInformation const& variableInformation, std::vector<storm::prism::StateReward> const& rewards, StateInformation const& stateInformation) {
storm::expressions::ExprtkExpressionEvaluator evaluator(program.getManager());
std::vector<ValueType> result(stateInformation.reachableStates.size());
for (uint_fast64_t index = 0; index < stateInformation.reachableStates.size(); index++) {
result[index] = storm::utility::zero<ValueType>();
unpackStateIntoEvaluator(stateInformation.reachableStates[index], variableInformation, evaluator);
for (auto const& reward : rewards) {
// Add this reward to the state if the state is included in the state reward.
if (evaluator.asBool(reward.getStatePredicateExpression())) {
result[index] += ValueType(evaluator.asDouble(reward.getRewardValueExpression()));
}
}
}
return result;
}
// Explicitly instantiate the class.
template class ExplicitPrismModelBuilder<double, uint32_t>;
}
}

248
src/builder/ExplicitPrismModelBuilder.h
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@ -0,0 +1,248 @@
#ifndef STORM_ADAPTERS_EXPLICITPRISMMODELBUILDER_H
#define STORM_ADAPTERS_EXPLICITPRISMMODELBUILDER_H
#include <memory>
#include <unordered_map>
#include <utility>
#include <vector>
#include <queue>
#include <cstdint>
#include <boost/functional/hash.hpp>
#include <boost/container/flat_set.hpp>
#include <boost/container/flat_map.hpp>
#include <boost/algorithm/string.hpp>
#include "src/storage/prism/Program.h"
#include "src/storage/expressions/SimpleValuation.h"
#include "src/storage/expressions/ExprtkExpressionEvaluator.h"
#include "src/storage/BitVectorHashMap.h"
#include "src/utility/PrismUtility.h"
#include "src/models/AbstractModel.h"
#include "src/models/Dtmc.h"
#include "src/models/Ctmc.h"
#include "src/models/Mdp.h"
#include "src/models/Ctmdp.h"
#include "src/models/AtomicPropositionsLabeling.h"
#include "src/storage/SparseMatrix.h"
#include "src/settings/SettingsManager.h"
#include "src/utility/macros.h"
#include "src/exceptions/WrongFormatException.h"
namespace storm {
namespace builder {
using namespace storm::utility::prism;
template<typename ValueType, typename IndexType = uint32_t>
class ExplicitPrismModelBuilder {
public:
typedef storm::storage::BitVector CompressedState;
// A structure holding information about the reachable state space.
struct StateInformation {
StateInformation(uint64_t bitsPerState);
// This member stores all the states and maps them to their unique indices.
storm::storage::BitVectorHashMap<IndexType> stateStorage;
// A list of initial states in terms of their global indices.
std::vector<IndexType> initialStateIndices;
// The number of bits of each state.
uint64_t bitsPerState;
// A list of reachable states as indices in the stateToIndexMap.
std::vector<storm::storage::BitVector> reachableStates;
};
// A structure storing information about the used variables of the program.
struct VariableInformation {
struct BooleanVariableInformation {
BooleanVariableInformation(storm::expressions::Variable const& variable, bool initialValue, uint_fast64_t bitOffset);
// The boolean variable.
storm::expressions::Variable variable;
// Its initial value.
bool initialValue;
// Its bit offset in the compressed state.
uint_fast64_t bitOffset;
};
struct IntegerVariableInformation {
IntegerVariableInformation(storm::expressions::Variable const& variable, int_fast64_t initialValue, int_fast64_t lowerBound, int_fast64_t upperBound, uint_fast64_t bitOffset, uint_fast64_t bitWidth);
// The integer variable.
storm::expressions::Variable variable;
// Its initial value.
int_fast64_t initialValue;
// The lower bound of its range.
int_fast64_t lowerBound;
// The upper bound of its range.
int_fast64_t upperBound;
// Its bit offset in the compressed state.
uint_fast64_t bitOffset;
// Its bit width in the compressed state.
uint_fast64_t bitWidth;
};
// Provide methods to access the bit offset and width of variables in the compressed state.
uint_fast64_t getBitOffset(storm::expressions::Variable const& variable) const;
uint_fast64_t getBitWidth(storm::expressions::Variable const& variable) const;
// The known boolean variables.
boost::container::flat_map<storm::expressions::Variable, uint_fast64_t> booleanVariableToIndexMap;
std::vector<BooleanVariableInformation> booleanVariables;
// The known integer variables.
boost::container::flat_map<storm::expressions::Variable, uint_fast64_t> integerVariableToIndexMap;
std::vector<IntegerVariableInformation> integerVariables;
};
// A structure holding the individual components of a model.
struct ModelComponents {
ModelComponents();
// The transition matrix.
storm::storage::SparseMatrix<ValueType> transitionMatrix;
// The state labeling.
storm::models::AtomicPropositionsLabeling stateLabeling;
// The state reward vector.
std::vector<ValueType> stateRewards;
// A matrix storing the reward for particular transitions.
storm::storage::SparseMatrix<ValueType> transitionRewardMatrix;
// A vector that stores a labeling for each choice.
std::vector<boost::container::flat_set<uint_fast64_t>> choiceLabeling;
};
/*!
* 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 program The program to translate.
* @param constantDefinitionString A string that contains a comma-separated definition of all undefined
* constants in the model.
* @param rewardModel The reward model that is to be built.
* @return The explicit model that was given by the probabilistic program.
*/
static std::unique_ptr<storm::models::AbstractModel<ValueType>> translateProgram(storm::prism::Program program, bool rewards = true, std::string const& rewardModelName = "", std::string const& constantDefinitionString = "");
private:
static void unpackStateIntoEvaluator(storm::storage::BitVector const& currentState, VariableInformation const& variableInformation, storm::expressions::ExprtkExpressionEvaluator& evaluator);
/*!
* Applies an update to the given state and returns the resulting new state object. This methods does not
* modify the given state but returns a new one.
*
* @params state The state to which to apply the update.
* @params update The update to apply.
* @return The resulting state.
*/
static CompressedState applyUpdate(VariableInformation const& variableInformation, CompressedState const& state, storm::prism::Update const& update, storm::expressions::ExprtkExpressionEvaluator const& evaluator);
/*!
* Applies an update to the given state and returns the resulting new state object. The update is evaluated
* over the variable values of the given base state. This methods does not modify the given state but
* returns a new one.
*
* @param state The state to which to apply the update.
* @param baseState The state used for evaluating the update.
* @param update The update to apply.
* @return The resulting state.
*/
static CompressedState applyUpdate(VariableInformation const& variableInformation, CompressedState const& state, CompressedState const& baseState, storm::prism::Update const& update, storm::expressions::ExprtkExpressionEvaluator const& evaluator);
/*!
* Retrieves the state id of the given state. If the state has not been encountered yet, it will be added to
* the lists of all states with a new id. If the state was already known, the object that is pointed to by
* the given state pointer is deleted and the old state id is returned. Note that the pointer should not be
* used after invoking this method.
*
* @param state A pointer to a state for which to retrieve the index. This must not be used after the call.
* @param stateInformation The information about the already explored part of the reachable state space.
* @return A pair indicating whether the state was already discovered before and the state id of the state.
*/
static IndexType getOrAddStateIndex(CompressedState const& state, StateInformation& stateInformation, std::queue<storm::storage::BitVector>& stateQueue);
/*!
* Retrieves all commands that are labeled with the given label and enabled in the given state, grouped by
* modules.
*
* This function will iterate over all modules and retrieve all commands that are labeled with the given
* action and active (i.e. enabled) in the current state. The result is a list of lists of commands in which
* the inner lists contain all commands of exactly one module. If a module does not have *any* (including
* disabled) commands, there will not be a list of commands of that module in the result. If, however, the
* module has a command with a relevant label, but no enabled one, nothing is returned to indicate that there
* is no legal transition possible.
*
* @param The program in which to search for active commands.
* @param state The current state.
* @param actionIndex The index of the action label to select.
* @return A list of lists of active commands or nothing.
*/
static boost::optional<std::vector<std::vector<std::reference_wrapper<storm::prism::Command const>>>> getActiveCommandsByActionIndex(storm::prism::Program const& program,storm::expressions::ExprtkExpressionEvaluator const& evaluator, uint_fast64_t const& actionIndex);
static std::vector<Choice<ValueType>> getUnlabeledTransitions(storm::prism::Program const& program, StateInformation& stateInformation, VariableInformation const& variableInformation, storm::storage::BitVector const& currentState, storm::expressions::ExprtkExpressionEvaluator const& evaluator, std::queue<storm::storage::BitVector>& stateQueue);
static std::vector<Choice<ValueType>> getLabeledTransitions(storm::prism::Program const& program, StateInformation& stateInformation, VariableInformation const& variableInformation, storm::storage::BitVector const& currentState, storm::expressions::ExprtkExpressionEvaluator const& evaluator, std::queue<storm::storage::BitVector>& stateQueue);
/*!
* Builds the transition matrix and the transition reward matrix based for the given program.
*
* @param program The program for which to build the matrices.
* @param variableInformation A structure containing information about the variables in the program.
* @param transitionRewards A list of transition rewards that are to be considered in the transition reward
* matrix.
* @param stateInformation A structure containing information about the states of the program.
* @param deterministicModel A flag indicating whether the model is supposed to be deterministic or not.
* @param transitionMatrix A reference to an initialized matrix which is filled with all transitions by this
* function.
* @param transitionRewardMatrix A reference to an initialized matrix which is filled with all transition
* rewards by this function.
* @return A tuple containing a vector with all rows at which the nondeterministic choices of each state begin
* and a vector containing the labels associated with each choice.
*/
static std::vector<boost::container::flat_set<uint_fast64_t>> buildMatrices(storm::prism::Program const& program, VariableInformation const& variableInformation, std::vector<storm::prism::TransitionReward> const& transitionRewards, StateInformation& stateInformation, bool deterministicModel, storm::storage::SparseMatrixBuilder<ValueType>& transitionMatrixBuilder, storm::storage::SparseMatrixBuilder<ValueType>& transitionRewardMatrixBuilder);
/*!
* Explores the state space of the given program and returns the components of the model as a result.
*
* @param program The program whose state space to explore.
* @param rewardModel The reward model that is to be considered.
* @return A structure containing the components of the resulting model.
*/
static ModelComponents buildModelComponents(storm::prism::Program const& program, storm::prism::RewardModel const& rewardModel);
/*!
* Builds the state labeling for the given program.
*
* @param program The program for which to build the state labeling.
* @param variableInformation Information about the variables in the program.
* @param stateInformation Information about the state space of the program.
* @return The state labeling of the given program.
*/
static storm::models::AtomicPropositionsLabeling buildStateLabeling(storm::prism::Program const& program, VariableInformation const& variableInformation, StateInformation const& stateInformation);
/*!
* Builds the state rewards for the given state space.
*
* @param rewards A vector of state rewards to consider.
* @param stateInformation Information about the state space.
* @return A vector containing the state rewards for the state space.
*/
static std::vector<ValueType> buildStateRewards(storm::prism::Program const& program, VariableInformation const& variableInformation, std::vector<storm::prism::StateReward> const& rewards, StateInformation const& stateInformation);
};
} // namespace adapters
} // namespace storm
#endif /* STORM_ADAPTERS_EXPLICITPRISMMODELBUILDER_H */

1
src/counterexamples/SMTMinimalCommandSetGenerator.h
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@ -8,7 +8,6 @@
#include "src/storage/prism/Program.h"
#include "src/storage/expressions/Expression.h"
#include "src/adapters/ExplicitModelAdapter.h"
#include "src/modelchecker/prctl/SparseMdpPrctlModelChecker.h"
#include "src/solver/GmmxxNondeterministicLinearEquationSolver.h"

2
src/storage/BitVectorHashMap.cpp
View File

@ -63,7 +63,7 @@ namespace storm {
uint_fast64_t failCount = 0;
while (fail) {
++failCount;
STORM_LOG_ASSERT(failCount < 10, "Increasing size failed too often.");
STORM_LOG_ASSERT(failCount < 2, "Increasing size failed too often.");
++currentSizeIterator;
STORM_LOG_ASSERT(currentSizeIterator != sizes.end(), "Hash map became to big.");

6
src/utility/cli.h
View File

@ -45,8 +45,8 @@ log4cplus::Logger logger;
// Model headers.
#include "src/models/AbstractModel.h"
// Headers of adapters.
#include "src/adapters/ExplicitModelAdapter.h"
// Headers of builders.
#include "src/builder/ExplicitPrismModelBuilder.h"
// Headers for model processing.
#include "src/storage/NaiveDeterministicModelBisimulationDecomposition.h"
@ -266,7 +266,7 @@ namespace storm {
storm::prism::Program program = storm::parser::PrismParser::parse(programFile);
// Then, build the model from the symbolic description.
result = storm::adapters::ExplicitModelAdapter<double>::translateProgram(program, true, settings.isSymbolicRewardModelNameSet() ? settings.getSymbolicRewardModelName() : "", constants);
result = storm::adapters::ExplicitPrismModelBuilder<double>::translateProgram(program, true, settings.isSymbolicRewardModelNameSet() ? settings.getSymbolicRewardModelName() : "", constants);
} else {
STORM_LOG_THROW(false, storm::exceptions::InvalidSettingsException, "No input model.");
}

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