sp
/
tempest
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

new bisimulation-based abstraction-refinement model checker that uses the new abstraction-refinement framework

main
dehnert 8 years ago
parent
330dfb96c7
commit
57a6115beb
5 changed files with 159 additions and 71 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 6
      src/storm/api/verification.h
  2. 61
      src/storm/modelchecker/abstraction/AbstractAbstractionRefinementModelChecker.cpp
  3. 142
      src/storm/modelchecker/abstraction/BisimulationAbstractionRefinementModelChecker.cpp
  4. 19
      src/storm/modelchecker/abstraction/BisimulationAbstractionRefinementModelChecker.h
  5. 2
      src/storm/modelchecker/abstraction/PartialBisimulationMdpModelChecker.cpp

6
src/storm/api/verification.h
View File

@ -12,7 +12,7 @@
#include "storm/modelchecker/prctl/SymbolicMdpPrctlModelChecker.h"
#include "storm/modelchecker/csl/SparseMarkovAutomatonCslModelChecker.h"
#include "storm/modelchecker/abstraction/GameBasedMdpModelChecker.h"
#include "storm/modelchecker/abstraction/PartialBisimulationMdpModelChecker.h"
#include "storm/modelchecker/abstraction/BisimulationAbstractionRefinementModelChecker.h"
#include "storm/modelchecker/exploration/SparseExplorationModelChecker.h"
#include "storm/modelchecker/reachability/SparseDtmcEliminationModelChecker.h"
@ -68,12 +68,12 @@ namespace storm {
typename std::enable_if<std::is_same<ValueType, double>::value, std::unique_ptr<storm::modelchecker::CheckResult>>::type verifyWithAbstractionRefinementEngine(std::shared_ptr<storm::models::symbolic::Model<DdType, ValueType>> const& model, storm::modelchecker::CheckTask<storm::logic::Formula, ValueType> const& task) {
std::unique_ptr<storm::modelchecker::CheckResult> result;
if (model->getType() == storm::models::ModelType::Dtmc) {
storm::modelchecker::PartialBisimulationMdpModelChecker<storm::models::symbolic::Dtmc<DdType, ValueType>> modelchecker(*model->template as<storm::models::symbolic::Dtmc<DdType, double>>());
storm::modelchecker::BisimulationAbstractionRefinementModelChecker<storm::models::symbolic::Dtmc<DdType, ValueType>> modelchecker(*model->template as<storm::models::symbolic::Dtmc<DdType, double>>());
if (modelchecker.canHandle(task)) {
result = modelchecker.check(task);
}
} else if (model->getType() == storm::models::ModelType::Mdp) {
storm::modelchecker::PartialBisimulationMdpModelChecker<storm::models::symbolic::Mdp<DdType, ValueType>> modelchecker(*model->template as<storm::models::symbolic::Mdp<DdType, double>>());
storm::modelchecker::BisimulationAbstractionRefinementModelChecker<storm::models::symbolic::Mdp<DdType, ValueType>> modelchecker(*model->template as<storm::models::symbolic::Mdp<DdType, double>>());
if (modelchecker.canHandle(task)) {
result = modelchecker.check(task);
}

61
src/storm/modelchecker/abstraction/AbstractAbstractionRefinementModelChecker.cpp
View File

@ -168,7 +168,8 @@ namespace storm {
// Phase (2): solve quantitatively.
if (!doSkipQuantitativeSolution) {
lastBounds = computeQuantitativeResult(abstractModel, *constraintAndTargetStates.first, *constraintAndTargetStates.second, *lastQualitativeResults);
STORM_LOG_ASSERT(lastBounds.first && lastBounds.second, "Expected both bounds.");
result = std::make_pair(lastBounds.first->clone(), lastBounds.second->clone());
filterInitialStates(abstractModel, result);
printBoundsInformation(result);
@ -176,8 +177,7 @@ namespace storm {
// Check whether the answer can be given after the quantitative solution.
if (checkForResultAfterQuantitativeCheck(abstractModel, true, result.first->asQuantitativeCheckResult<ValueType>())) {
result.second = nullptr;
}
if (checkForResultAfterQuantitativeCheck(abstractModel, false, result.second->asQuantitativeCheckResult<ValueType>())) {
} else if (checkForResultAfterQuantitativeCheck(abstractModel, false, result.second->asQuantitativeCheckResult<ValueType>())) {
result.first = nullptr;
}
} else {
@ -193,27 +193,37 @@ namespace storm {
}
template<typename ModelType>
bool AbstractAbstractionRefinementModelChecker<ModelType>::checkForResultAfterQuantitativeCheck(storm::models::Model<ValueType> const& abstractModel, bool lowerBounds, QuantitativeCheckResult<ValueType> const& result) {
storm::logic::ComparisonType comparisonType = checkTask->getBoundComparisonType();
ValueType threshold = checkTask->getBoundThreshold();
bool AbstractAbstractionRefinementModelChecker<ModelType>::checkForResultAfterQuantitativeCheck(storm::models::Model<ValueType> const& abstractModel, bool lowerBounds, QuantitativeCheckResult<ValueType> const& quantitativeResult) {
if (lowerBounds) {
if (storm::logic::isLowerBound(comparisonType)) {
ValueType minimalLowerBound = result.getMin();
return (storm::logic::isStrict(comparisonType) && minimalLowerBound > threshold) || (!storm::logic::isStrict(comparisonType) && minimalLowerBound >= threshold);
bool result = false;
if (checkTask->isBoundSet()) {
storm::logic::ComparisonType comparisonType = checkTask->getBoundComparisonType();
ValueType threshold = checkTask->getBoundThreshold();
if (lowerBounds) {
if (storm::logic::isLowerBound(comparisonType)) {
ValueType minimalLowerBound = quantitativeResult.getMin();
result = (storm::logic::isStrict(comparisonType) && minimalLowerBound > threshold) || (!storm::logic::isStrict(comparisonType) && minimalLowerBound >= threshold);
} else {
ValueType maximalLowerBound = quantitativeResult.getMax();
result = (storm::logic::isStrict(comparisonType) && maximalLowerBound >= threshold) || (!storm::logic::isStrict(comparisonType) && maximalLowerBound > threshold);
}
} else {
ValueType maximalLowerBound = result.getMax();
return (storm::logic::isStrict(comparisonType) && maximalLowerBound >= threshold) || (!storm::logic::isStrict(comparisonType) && maximalLowerBound > threshold);
if (storm::logic::isLowerBound(comparisonType)) {
ValueType minimalUpperBound = quantitativeResult.getMin();
result = (storm::logic::isStrict(comparisonType) && minimalUpperBound <= threshold) || (!storm::logic::isStrict(comparisonType) && minimalUpperBound < threshold);
} else {
ValueType maximalUpperBound = quantitativeResult.getMax();
result = (storm::logic::isStrict(comparisonType) && maximalUpperBound < threshold) || (!storm::logic::isStrict(comparisonType) && maximalUpperBound <= threshold);
}
}
} else {
if (storm::logic::isLowerBound(comparisonType)) {
ValueType minimalUpperBound = result.getMin();
return (storm::logic::isStrict(comparisonType) && minimalUpperBound <= threshold) || (!storm::logic::isStrict(comparisonType) && minimalUpperBound < threshold);
} else {
ValueType maximalUpperBound = result.getMax();
return (storm::logic::isStrict(comparisonType) && maximalUpperBound < threshold) || (!storm::logic::isStrict(comparisonType) && maximalUpperBound <= threshold);
if (result) {
STORM_LOG_TRACE("Check for result after quantiative check positive.");
}
}
return result;
}
template<typename ModelType>
@ -458,7 +468,7 @@ namespace storm {
states = storm::utility::graph::performProb1E(abstractModel, transitionMatrixBdd, constraintStates.getStates(), targetStates.getStates(), lastQualitativeResults ? lastQualitativeResults->asSymbolicQualitativeResultMinMax<DdType>().getProb1Min().getStates() : storm::utility::graph::performProbGreater0E(abstractModel, transitionMatrixBdd, constraintStates.getStates(), targetStates.getStates()));
result->prob1Max = storm::abstraction::QualitativeMdpResult<DdType>(states);
states = storm::utility::graph::performProb1A(abstractModel, transitionMatrixBdd, lastQualitativeResults ? lastQualitativeResults->asSymbolicQualitativeResultMinMax<DdType>().getProb1Min().getStates() : targetStates.getStates(), states);
states = storm::utility::graph::performProb1A(abstractModel, transitionMatrixBdd, lastQualitativeResults ? lastQualitativeResults->asSymbolicQualitativeResultMinMax<DdType>().getProb1Min().getStates() : targetStates.getStates(), storm::utility::graph::performProbGreater0A(abstractModel, transitionMatrixBdd, constraintStates.getStates(), targetStates.getStates()));
result->prob1Min = storm::abstraction::QualitativeMdpResult<DdType>(states);
states = storm::utility::graph::performProb0E(abstractModel, transitionMatrixBdd, constraintStates.getStates(), targetStates.getStates());
@ -482,6 +492,13 @@ namespace storm {
auto end = std::chrono::high_resolution_clock::now();
auto timeInMilliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count();
if (isRewardFormula) {
STORM_LOG_TRACE("Min: " << result->getProb1Min().getStates().getNonZeroCount() << " states with probability 1.");
STORM_LOG_TRACE("Max: " << result->getProb1Max().getStates().getNonZeroCount() << " states with probability 1.");
} else {
STORM_LOG_TRACE("Min: " << result->getProb0Min().getStates().getNonZeroCount() << " states with probability 0, " << result->getProb1Min().getStates().getNonZeroCount() << " states with probability 1.");
STORM_LOG_TRACE("Max: " << result->getProb0Max().getStates().getNonZeroCount() << " states with probability 0, " << result->getProb1Max().getStates().getNonZeroCount() << " states with probability 1.");
}
STORM_LOG_DEBUG("Computed qualitative solution in " << timeInMilliseconds << "ms.");
return result;
@ -617,6 +634,10 @@ namespace storm {
}
}
if (result) {
STORM_LOG_TRACE("Check for result after qualitative check positive.");
}
return result;
}

142
src/storm/modelchecker/abstraction/BisimulationAbstractionRefinementModelChecker.cpp
View File

@ -2,6 +2,17 @@
#include "storm/models/symbolic/Dtmc.h"
#include "storm/models/symbolic/Mdp.h"
#include "storm/models/symbolic/StochasticTwoPlayerGame.h"
#include "storm/abstraction/SymbolicStateSet.h"
#include "storm/storage/dd/BisimulationDecomposition.h"
#include "storm/modelchecker/propositional/SymbolicPropositionalModelChecker.h"
#include "storm/modelchecker/results/SymbolicQualitativeCheckResult.h"
#include "storm/utility/macros.h"
#include "storm/exceptions/NotSupportedException.h"
namespace storm {
namespace modelchecker {
@ -19,45 +30,98 @@ namespace storm {
// Intentionally left empty.
}
// template<typename ModelType>
// bool BisimulationAbstractionRefinementModelChecker<ModelType>::supportsReachabilityRewards() const {
// return true;
// }
//
// template<typename ModelType>
// std::string const& BisimulationAbstractionRefinementModelChecker<ModelType>::getName() const {
// return name;
// }
//
// template<typename ModelType>
// void BisimulationAbstractionRefinementModelChecker<ModelType>::initializeAbstractionRefinement() {
//
// }
//
// template<typename ModelType>
// std::shared_ptr<storm::models::Model<typename BisimulationAbstractionRefinementModelChecker<ModelType>::ValueType>> BisimulationAbstractionRefinementModelChecker<ModelType>::getAbstractModel() {
//
// }
//
// template<typename ModelType>
// std::pair<std::unique_ptr<storm::abstraction::StateSet>, std::unique_ptr<storm::abstraction::StateSet>> BisimulationAbstractionRefinementModelChecker<ModelType>::getConstraintAndTargetStates(storm::models::Model<ValueType> const& abstractModel) {
//
// }
//
// template<typename ModelType>
// uint64_t BisimulationAbstractionRefinementModelChecker<ModelType>::getAbstractionPlayer() const {
// return 1;
// }
//
// template<typename ModelType>
// bool BisimulationAbstractionRefinementModelChecker<ModelType>::requiresSchedulerSynthesis() const {
// return false;
// }
//
// template<typename ModelType>
// void BisimulationAbstractionRefinementModelChecker<ModelType>::refineAbstractModel() {
//
// }
template<typename ModelType>
bool BisimulationAbstractionRefinementModelChecker<ModelType>::supportsReachabilityRewards() const {
return true;
}
template<typename ModelType>
std::string const& BisimulationAbstractionRefinementModelChecker<ModelType>::getName() const {
return name;
}
template<typename ModelType>
void BisimulationAbstractionRefinementModelChecker<ModelType>::initializeAbstractionRefinement() {
// Create the appropriate preservation information.
auto const& checkTask = this->getCheckTask();
storm::dd::bisimulation::PreservationInformation<DdType, ValueType> preservationInformation(model, {checkTask.getFormula().asSharedPointer()});
if (checkTask.getFormula().isEventuallyFormula() && checkTask.getFormula().asEventuallyFormula().getContext() == storm::logic::FormulaContext::Reward) {
if (!checkTask.isRewardModelSet() || model.hasUniqueRewardModel()) {
preservationInformation.addRewardModel(model.getUniqueRewardModelName());
} else if (checkTask.isRewardModelSet()) {
preservationInformation.addRewardModel(checkTask.getRewardModel());
}
}
// Create the bisimulation object.
this->bisimulation = std::make_unique<storm::dd::BisimulationDecomposition<DdType, ValueType>>(this->model, storm::storage::BisimulationType::Strong, preservationInformation);
}
template<typename ModelType>
std::shared_ptr<storm::models::Model<typename BisimulationAbstractionRefinementModelChecker<ModelType>::ValueType>> BisimulationAbstractionRefinementModelChecker<ModelType>::getAbstractModel() {
lastAbstractModel = this->bisimulation->getQuotient();
return lastAbstractModel;
}
template<typename ModelType>
std::pair<std::unique_ptr<storm::abstraction::StateSet>, std::unique_ptr<storm::abstraction::StateSet>> BisimulationAbstractionRefinementModelChecker<ModelType>::getConstraintAndTargetStates(storm::models::Model<ValueType> const& abstractModel) {
STORM_LOG_ASSERT(lastAbstractModel, "Expected abstract model.");
std::pair<storm::dd::Bdd<DdType>, storm::dd::Bdd<DdType>> ddResult;
if (lastAbstractModel->isOfType(storm::models::ModelType::Dtmc)) {
ddResult = this->getConstraintAndTargetStates(*lastAbstractModel->template as<storm::models::symbolic::Dtmc<DdType, ValueType>>());
} else if (lastAbstractModel->isOfType(storm::models::ModelType::Mdp)) {
ddResult = this->getConstraintAndTargetStates(*lastAbstractModel->template as<storm::models::symbolic::Mdp<DdType, ValueType>>());
} else {
ddResult = this->getConstraintAndTargetStates(*lastAbstractModel->template as<storm::models::symbolic::StochasticTwoPlayerGame<DdType, ValueType>>());
}
std::pair<std::unique_ptr<storm::abstraction::StateSet>, std::unique_ptr<storm::abstraction::StateSet>> result;
result.first = std::make_unique<storm::abstraction::SymbolicStateSet<DdType>>(ddResult.first);
result.second = std::make_unique<storm::abstraction::SymbolicStateSet<DdType>>(ddResult.second);
return result;
}
template<typename ModelType>
template<typename QuotientModelType>
std::pair<storm::dd::Bdd<BisimulationAbstractionRefinementModelChecker<ModelType>::DdType>, storm::dd::Bdd<BisimulationAbstractionRefinementModelChecker<ModelType>::DdType>> BisimulationAbstractionRefinementModelChecker<ModelType>::getConstraintAndTargetStates(QuotientModelType const& quotient) {
std::pair<storm::dd::Bdd<DdType>, storm::dd::Bdd<DdType>> result;
auto const& checkTask = this->getCheckTask();
SymbolicPropositionalModelChecker<QuotientModelType> checker(quotient);
if (checkTask.getFormula().isUntilFormula()) {
std::unique_ptr<CheckResult> subresult = checker.check(checkTask.getFormula().asUntilFormula().getLeftSubformula());
result.first = subresult->asSymbolicQualitativeCheckResult<DdType>().getTruthValuesVector();
subresult = checker.check(checkTask.getFormula().asUntilFormula().getRightSubformula());
result.second = subresult->asSymbolicQualitativeCheckResult<DdType>().getTruthValuesVector();
} else if (checkTask.getFormula().isEventuallyFormula()) {
storm::logic::EventuallyFormula const& eventuallyFormula = checkTask.getFormula().asEventuallyFormula();
result.first = quotient.getReachableStates();
std::unique_ptr<CheckResult> subresult = checker.check(eventuallyFormula.getSubformula());
result.second = subresult->asSymbolicQualitativeCheckResult<DdType>().getTruthValuesVector();
} else {
STORM_LOG_THROW(false, storm::exceptions::NotSupportedException, "The given formula is not supported by this model checker.");
}
return result;
}
template<typename ModelType>
uint64_t BisimulationAbstractionRefinementModelChecker<ModelType>::getAbstractionPlayer() const {
return 1;
}
template<typename ModelType>
bool BisimulationAbstractionRefinementModelChecker<ModelType>::requiresSchedulerSynthesis() const {
return false;
}
template<typename ModelType>
void BisimulationAbstractionRefinementModelChecker<ModelType>::refineAbstractModel() {
STORM_LOG_ASSERT(bisimulation, "Bisimulation object required.");
this->bisimulation->compute(10);
}
template class BisimulationAbstractionRefinementModelChecker<storm::models::symbolic::Dtmc<storm::dd::DdType::CUDD, double>>;
template class BisimulationAbstractionRefinementModelChecker<storm::models::symbolic::Mdp<storm::dd::DdType::CUDD, double>>;

19
src/storm/modelchecker/abstraction/BisimulationAbstractionRefinementModelChecker.h
View File

@ -31,16 +31,19 @@ namespace storm {
virtual ~BisimulationAbstractionRefinementModelChecker();
protected:
// virtual bool supportsReachabilityRewards() const override;
// virtual std::string const& getName() const override;
// virtual void initializeAbstractionRefinement() override;
// virtual std::shared_ptr<storm::models::Model<ValueType>> getAbstractModel() override;
// virtual std::pair<std::unique_ptr<storm::abstraction::StateSet>, std::unique_ptr<storm::abstraction::StateSet>> getConstraintAndTargetStates(storm::models::Model<ValueType> const& abstractModel) override;
// virtual uint64_t getAbstractionPlayer() const override;
// virtual bool requiresSchedulerSynthesis() const override;
// virtual void refineAbstractModel() override;
virtual bool supportsReachabilityRewards() const override;
virtual std::string const& getName() const override;
virtual void initializeAbstractionRefinement() override;
virtual std::shared_ptr<storm::models::Model<ValueType>> getAbstractModel() override;
virtual std::pair<std::unique_ptr<storm::abstraction::StateSet>, std::unique_ptr<storm::abstraction::StateSet>> getConstraintAndTargetStates(storm::models::Model<ValueType> const& abstractModel) override;
virtual uint64_t getAbstractionPlayer() const override;
virtual bool requiresSchedulerSynthesis() const override;
virtual void refineAbstractModel() override;
private:
template<typename QuotientModelType>
std::pair<storm::dd::Bdd<DdType>, storm::dd::Bdd<DdType>> getConstraintAndTargetStates(QuotientModelType const& quotient);
ModelType const& model;
/// The bisimulation object that maintains and refines the model.

2
src/storm/modelchecker/abstraction/PartialBisimulationMdpModelChecker.cpp
View File

@ -122,7 +122,7 @@ namespace storm {
if (!converged) {
STORM_LOG_TRACE("Performing bisimulation step.");
bisimulation.compute(1);
bisimulation.compute(10);
}
}

Write Preview
Loading…
Cancel
Save