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allowed for more fine grained solver requirements

tempestpy_adaptions
TimQu 7 years ago
parent
9559a96fd7
commit
3310f51857
19 changed files with 299 additions and 140 deletions
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  1. 6
      src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp
  2. 6
      src/storm/modelchecker/csl/helper/SparseCtmcCslHelper.cpp
  3. 8
      src/storm/modelchecker/csl/helper/SparseMarkovAutomatonCslHelper.cpp
  4. 4
      src/storm/modelchecker/multiobjective/pcaa/RewardBoundedMdpPcaaWeightVectorChecker.cpp
  5. 2
      src/storm/modelchecker/multiobjective/pcaa/StandardMaPcaaWeightVectorChecker.cpp
  6. 9
      src/storm/modelchecker/multiobjective/pcaa/StandardPcaaWeightVectorChecker.cpp
  7. 6
      src/storm/modelchecker/prctl/helper/HybridDtmcPrctlHelper.cpp
  8. 34
      src/storm/modelchecker/prctl/helper/HybridMdpPrctlHelper.cpp
  9. 6
      src/storm/modelchecker/prctl/helper/SparseDtmcPrctlHelper.cpp
  10. 16
      src/storm/modelchecker/prctl/helper/SparseMdpPrctlHelper.cpp
  11. 16
      src/storm/modelchecker/prctl/helper/SymbolicMdpPrctlHelper.cpp
  12. 64
      src/storm/solver/LinearEquationSolverRequirements.cpp
  13. 29
      src/storm/solver/LinearEquationSolverRequirements.h
  14. 103
      src/storm/solver/MinMaxLinearEquationSolverRequirements.cpp
  15. 41
      src/storm/solver/MinMaxLinearEquationSolverRequirements.h
  16. 32
      src/storm/solver/SolverRequirement.cpp
  17. 39
      src/storm/solver/SolverRequirement.h
  18. 16
      src/storm/solver/TopologicalMinMaxLinearEquationSolver.cpp
  19. 2
      src/test/storm/solver/MinMaxLinearEquationSolverTest.cpp

6
src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp
View File

@ -152,7 +152,7 @@ namespace storm {
// The solution of the min-max equation system will always be unique (assuming graph-preserving instantiations).
auto req = solverFactory->getRequirements(env, true, boost::none, true);
req.clearBounds();
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "Unchecked solver requirement.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
solverFactory->setRequirementsChecked(true);
}
@ -191,11 +191,11 @@ namespace storm {
// The solution of the min-max equation system will always be unique (assuming graph-preserving instantiations).
auto req = solverFactory->getRequirements(env, true, boost::none, true);
req.clearLowerBounds();
if (req.requiresUpperBounds()) {
if (req.upperBounds()) {
solvingRequiresUpperRewardBounds = true;
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "Unchecked solver requirement.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
solverFactory->setRequirementsChecked(true);

6
src/storm/modelchecker/csl/helper/SparseCtmcCslHelper.cpp
View File

@ -492,7 +492,8 @@ namespace storm {
{
// Check solver requirements
storm::solver::GeneralLinearEquationSolverFactory<ValueType> linearEquationSolverFactory;
STORM_LOG_THROW(linearEquationSolverFactory.getRequirements(env).empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement of the linear equation solver could not be matched.");
auto requirements = linearEquationSolverFactory.getRequirements(env);
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
// Check whether we have the right input format for the solver.
STORM_LOG_THROW(linearEquationSolverFactory.getEquationProblemFormat(env) == storm::solver::LinearEquationSolverProblemFormat::EquationSystem, storm::exceptions::FormatUnsupportedBySolverException, "The selected solver does not support the required format.");
std::unique_ptr<storm::solver::LinearEquationSolver<ValueType>> solver = linearEquationSolverFactory.create(env, std::move(bsccEquationSystem));
@ -565,7 +566,8 @@ namespace storm {
{
storm::solver::GeneralLinearEquationSolverFactory<ValueType> linearEquationSolverFactory;
// Check solver requirements
STORM_LOG_THROW(linearEquationSolverFactory.getRequirements(env).empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement of the linear equation solver could not be matched.");
auto requirements = linearEquationSolverFactory.getRequirements(env);
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
// Check whether we have the right input format for the solver.
STORM_LOG_THROW(linearEquationSolverFactory.getEquationProblemFormat(env) == storm::solver::LinearEquationSolverProblemFormat::EquationSystem, storm::exceptions::FormatUnsupportedBySolverException, "The selected solver does not support the required format.");
std::unique_ptr<storm::solver::LinearEquationSolver<ValueType>> solver = linearEquationSolverFactory.create(env, std::move(rewardEquationSystemMatrix));

8
src/storm/modelchecker/csl/helper/SparseMarkovAutomatonCslHelper.cpp
View File

@ -287,7 +287,7 @@ namespace storm {
storm::solver::GeneralMinMaxLinearEquationSolverFactory<ValueType> minMaxLinearEquationSolverFactory;
storm::solver::MinMaxLinearEquationSolverRequirements requirements = minMaxLinearEquationSolverFactory.getRequirements(env, true, dir);
requirements.clearBounds();
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
if (numberOfProbabilisticChoices > 0) {
solver = minMaxLinearEquationSolverFactory.create(env, probMatrix);
@ -449,7 +449,7 @@ namespace storm {
storm::solver::GeneralMinMaxLinearEquationSolverFactory<ValueType> minMaxLinearEquationSolverFactory;
storm::solver::MinMaxLinearEquationSolverRequirements requirements = minMaxLinearEquationSolverFactory.getRequirements(env, true, dir);
requirements.clearBounds();
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
std::unique_ptr<storm::solver::MinMaxLinearEquationSolver<ValueType>> solver = minMaxLinearEquationSolverFactory.create(env, aProbabilistic);
solver->setHasUniqueSolution();
@ -757,7 +757,7 @@ namespace storm {
storm::solver::GeneralMinMaxLinearEquationSolverFactory<ValueType> minMaxLinearEquationSolverFactory;
storm::solver::MinMaxLinearEquationSolverRequirements requirements = minMaxLinearEquationSolverFactory.getRequirements(env, true, dir);
requirements.clearBounds();
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
std::unique_ptr<storm::solver::MinMaxLinearEquationSolver<ValueType>> solver = minMaxLinearEquationSolverFactory.create(env, sspMatrix);
solver->setHasUniqueSolution();
@ -971,7 +971,7 @@ namespace storm {
storm::solver::GeneralMinMaxLinearEquationSolverFactory<ValueType> minMaxLinearEquationSolverFactory;
storm::solver::MinMaxLinearEquationSolverRequirements requirements = minMaxLinearEquationSolverFactory.getRequirements(env, true, dir);
requirements.clearLowerBounds();
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
auto solver = minMaxLinearEquationSolverFactory.create(env, std::move(aProbabilistic));
solver->setLowerBound(storm::utility::zero<ValueType>());

4
src/storm/modelchecker/multiobjective/pcaa/RewardBoundedMdpPcaaWeightVectorChecker.cpp
View File

@ -295,7 +295,7 @@ namespace storm {
cachedData.linEqSolver->setUpperBound(*obj.upperResultBound);
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement was not checked.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
cachedData.linEqSolver->solveEquations(env, x, cachedData.bLinEq);
auto resultIt = result.begin();
for (auto const& state : epochModel.epochInStates) {
@ -331,7 +331,7 @@ namespace storm {
cachedData.minMaxSolver->setUpperBound(upperBound.get());
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement was not checked.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
cachedData.minMaxSolver->setRequirementsChecked(true);
cachedData.minMaxSolver->setOptimizationDirection(storm::solver::OptimizationDirection::Maximize);

2
src/storm/modelchecker/multiobjective/pcaa/StandardMaPcaaWeightVectorChecker.cpp
View File

@ -314,7 +314,7 @@ namespace storm {
result->solver->setUpperBound(upperBound.get());
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement of the MinMaxSolver was not met.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
result->solver->setRequirementsChecked(true);
result->solver->setOptimizationDirection(storm::solver::OptimizationDirection::Maximize);

9
src/storm/modelchecker/multiobjective/pcaa/StandardPcaaWeightVectorChecker.cpp
View File

@ -180,14 +180,14 @@ namespace storm {
solver->setHasUniqueSolution(true);
solver->setOptimizationDirection(storm::solver::OptimizationDirection::Maximize);
auto req = solver->getRequirements(env, storm::solver::OptimizationDirection::Maximize);
setBoundsToSolver(*solver, req.requiresLowerBounds(), req.requiresUpperBounds(), weightVector, objectivesWithNoUpperTimeBound, ecQuotient->matrix, ecQuotient->rowsWithSumLessOne, ecQuotient->auxChoiceValues);
setBoundsToSolver(*solver, req.lowerBounds(), req.upperBounds(), weightVector, objectivesWithNoUpperTimeBound, ecQuotient->matrix, ecQuotient->rowsWithSumLessOne, ecQuotient->auxChoiceValues);
if (solver->hasLowerBound()) {
req.clearLowerBounds();
}
if (solver->hasUpperBound()) {
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement was not checked.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
solver->setRequirementsChecked(true);
// Use the (0...0) vector as initial guess for the solution.
@ -266,15 +266,14 @@ namespace storm {
solver->clearBounds();
storm::storage::BitVector submatrixRowsWithSumLessOne = deterministicMatrix.getRowFilter(maybeStates, maybeStates) % maybeStates;
submatrixRowsWithSumLessOne.complement();
this->setBoundsToSolver(*solver, req.requiresLowerBounds(), req.requiresUpperBounds(), objIndex, submatrix, submatrixRowsWithSumLessOne, b);
this->setBoundsToSolver(*solver, req.lowerBounds(), req.upperBounds(), objIndex, submatrix, submatrixRowsWithSumLessOne, b);
if (solver->hasLowerBound()) {
req.clearLowerBounds();
}
if (solver->hasUpperBound()) {
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement of the LinearEquationSolver was not met.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
solver->solveEquations(env, x, b);
// Set the result for this objective accordingly
storm::utility::vector::setVectorValues<ValueType>(objectiveResults[objIndex], maybeStates, x);

6
src/storm/modelchecker/prctl/helper/HybridDtmcPrctlHelper.cpp
View File

@ -72,7 +72,7 @@ namespace storm {
auto req = linearEquationSolverFactory.getRequirements(env);
req.clearLowerBounds();
req.clearUpperBounds();
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement of the linear equation solver could not be matched.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
// Check whether we need to create an equation system.
bool convertToEquationSystem = linearEquationSolverFactory.getEquationProblemFormat(env) == storm::solver::LinearEquationSolverProblemFormat::EquationSystem;
@ -285,14 +285,14 @@ namespace storm {
storm::solver::GeneralLinearEquationSolverFactory<ValueType> linearEquationSolverFactory;
auto req = linearEquationSolverFactory.getRequirements(env);
req.clearLowerBounds();
if (req.requiresUpperBounds()) {
if (req.upperBounds()) {
storm::dd::Add<DdType, ValueType> targetStatesAsColumn = targetStates.template toAdd<ValueType>();
targetStatesAsColumn = targetStatesAsColumn.swapVariables(model.getRowColumnMetaVariablePairs());
oneStepTargetProbs = submatrix * targetStatesAsColumn;
oneStepTargetProbs = oneStepTargetProbs->sumAbstract(model.getColumnVariables());
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement of the linear equation solver could not be matched.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
// Check whether we need to create an equation system.
bool convertToEquationSystem = linearEquationSolverFactory.getEquationProblemFormat(env) == storm::solver::LinearEquationSolverProblemFormat::EquationSystem;

34
src/storm/modelchecker/prctl/helper/HybridMdpPrctlHelper.cpp
View File

@ -155,18 +155,18 @@ namespace storm {
SolverRequirementsData<ValueType> solverRequirementsData;
bool extendMaybeStates = false;
if (!clearedRequirements.empty()) {
if (clearedRequirements.requiresNoEndComponents()) {
if (clearedRequirements.hasEnabledRequirement()) {
if (clearedRequirements.noEndComponents()) {
STORM_LOG_DEBUG("Scheduling EC elimination, because the solver requires it.");
extendMaybeStates = true;
clearedRequirements.clearNoEndComponents();
}
if (clearedRequirements.requiresValidInitialScheduler()) {
if (clearedRequirements.validInitialScheduler()) {
STORM_LOG_DEBUG("Scheduling valid scheduler computation, because the solver requires it.");
clearedRequirements.clearValidInitialScheduler();
}
clearedRequirements.clearBounds();
STORM_LOG_THROW(clearedRequirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!clearedRequirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + clearedRequirements.getEnabledRequirementsAsString() + " not checked.");
}
storm::dd::Bdd<DdType> extendedMaybeStates = maybeStates;
@ -228,7 +228,7 @@ namespace storm {
explicitRepresentation = submatrix.toMatrixVector(subvector, model.getNondeterminismVariables(), odd, odd);
conversionWatch.stop();
if (requirements.requiresValidInitialScheduler()) {
if (requirements.validInitialScheduler()) {
solverRequirementsData.initialScheduler = computeValidInitialSchedulerForUntilProbabilities<ValueType>(explicitRepresentation.first, explicitRepresentation.second);
}
}
@ -251,7 +251,7 @@ namespace storm {
solver->solveEquations(env, dir, x, explicitRepresentation.second);
// If we included some target and non-filter states in the ODD, we need to expand the result from the solver.
if (requirements.requiresNoEndComponents() && solverRequirementsData.ecInformation) {
if (requirements.noEndComponents() && solverRequirementsData.ecInformation) {
std::vector<ValueType> extendedVector(solverRequirementsData.properMaybeStates.getNumberOfSetBits());
solverRequirementsData.ecInformation.get().setValues(extendedVector, solverRequirementsData.properMaybeStates, x);
x = std::move(extendedVector);
@ -549,24 +549,24 @@ namespace storm {
storm::solver::MinMaxLinearEquationSolverRequirements requirements = linearEquationSolverFactory.getRequirements(env, uniqueSolution, dir);
storm::solver::MinMaxLinearEquationSolverRequirements clearedRequirements = requirements;
bool extendMaybeStates = false;
if (!clearedRequirements.empty()) {
if (clearedRequirements.requiresNoEndComponents()) {
if (clearedRequirements.hasEnabledRequirement()) {
if (clearedRequirements.noEndComponents()) {
STORM_LOG_DEBUG("Scheduling EC elimination, because the solver requires it.");
extendMaybeStates = true;
clearedRequirements.clearNoEndComponents();
}
if (clearedRequirements.requiresValidInitialScheduler()) {
if (clearedRequirements.validInitialScheduler()) {
STORM_LOG_DEBUG("Computing valid scheduler, because the solver requires it.");
extendMaybeStates = true;
clearedRequirements.clearValidInitialScheduler();
}
clearedRequirements.clearLowerBounds();
if (clearedRequirements.requiresUpperBounds()) {
if (clearedRequirements.upperBounds()) {
STORM_LOG_DEBUG("Computing upper bounds, because the solver requires it.");
extendMaybeStates = true;
clearedRequirements.clearUpperBounds();
}
STORM_LOG_THROW(clearedRequirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!clearedRequirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + clearedRequirements.getEnabledRequirementsAsString() + " not checked.");
}
// Compute the set of maybe states that we are required to keep in the translation to explicit.
@ -611,17 +611,17 @@ namespace storm {
storm::storage::BitVector targetStates = computeTargetStatesForReachabilityRewardsFromExplicitRepresentation(explicitRepresentation.first);
solverRequirementsData.properMaybeStates = ~targetStates;
if (requirements.requiresNoEndComponents()) {
eliminateEndComponentsAndTargetStatesReachabilityRewards(explicitRepresentation, solverRequirementsData, targetStates, requirements.requiresUpperBounds());
if (requirements.noEndComponents()) {
eliminateEndComponentsAndTargetStatesReachabilityRewards(explicitRepresentation, solverRequirementsData, targetStates, requirements.upperBounds());
// The solution becomes unique after end components have been eliminated.
uniqueSolution = true;
} else {
if (requirements.requiresValidInitialScheduler()) {
if (requirements.validInitialScheduler()) {
// Compute a valid initial scheduler.
solverRequirementsData.initialScheduler = computeValidInitialSchedulerForReachabilityRewards<ValueType>(explicitRepresentation.first, solverRequirementsData.properMaybeStates, targetStates);
}
if (requirements.requiresUpperBounds()) {
if (requirements.upperBounds()) {
solverRequirementsData.oneStepTargetProbabilities = computeOneStepTargetProbabilitiesFromExtendedExplicitRepresentation(explicitRepresentation.first, solverRequirementsData.properMaybeStates, targetStates);
}
@ -641,7 +641,7 @@ namespace storm {
solver->setHasUniqueSolution(uniqueSolution);
// If the solver requires upper bounds, compute them now.
if (requirements.requiresUpperBounds()) {
if (requirements.upperBounds()) {
setUpperRewardBounds(*solver, dir, explicitRepresentation.first, explicitRepresentation.second, solverRequirementsData.oneStepTargetProbabilities.get());
}
@ -657,7 +657,7 @@ namespace storm {
solver->solveEquations(env, dir, x, explicitRepresentation.second);
// If we eliminated end components, we need to extend the solution vector.
if (requirements.requiresNoEndComponents() && solverRequirementsData.ecInformation) {
if (requirements.noEndComponents() && solverRequirementsData.ecInformation) {
std::vector<ValueType> extendedVector(solverRequirementsData.properMaybeStates.getNumberOfSetBits());
solverRequirementsData.ecInformation.get().setValues(extendedVector, solverRequirementsData.properMaybeStates, x);
x = std::move(extendedVector);

6
src/storm/modelchecker/prctl/helper/SparseDtmcPrctlHelper.cpp
View File

@ -128,7 +128,7 @@ namespace storm {
linEqSolver->setUpperBound(upperBound.get());
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement was not checked.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
}
// Prepare the right hand side of the equation system
@ -487,11 +487,11 @@ namespace storm {
storm::solver::LinearEquationSolverRequirements requirements = linearEquationSolverFactory.getRequirements(env);
boost::optional<std::vector<ValueType>> upperRewardBounds;
requirements.clearLowerBounds();
if (requirements.requiresUpperBounds()) {
if (requirements.upperBounds()) {
upperRewardBounds = computeUpperRewardBounds(submatrix, b, transitionMatrix.getConstrainedRowSumVector(maybeStates, rew0States));
requirements.clearUpperBounds();
}
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "There are unchecked requirements of the solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
// If necessary, convert the matrix from the fixpoint notation to the form needed for the equation system.
if (convertToEquationSystem) {

16
src/storm/modelchecker/prctl/helper/SparseMdpPrctlHelper.cpp
View File

@ -158,7 +158,7 @@ namespace storm {
minMaxSolver->setUpperBound(upperBound.get());
req.clearUpperBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UncheckedRequirementException, "At least one requirement was not checked.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
minMaxSolver->setRequirementsChecked();
} else {
auto choicesTmp = minMaxSolver->getSchedulerChoices();
@ -437,10 +437,9 @@ namespace storm {
bool hasSchedulerHint = hint.isExplicitModelCheckerHint() && hint.template asExplicitModelCheckerHint<ValueType>().hasSchedulerHint();
storm::solver::GeneralMinMaxLinearEquationSolverFactory<ValueType> minMaxLinearEquationSolverFactory;
storm::solver::MinMaxLinearEquationSolverRequirements requirements = minMaxLinearEquationSolverFactory.getRequirements(env, result.uniqueSolution, dir, hasSchedulerHint);
if (!requirements.empty()) {
if (requirements.hasEnabledRequirement()) {
// If the solver still requires no end-components, we have to eliminate them later.
if (requirements.requiresNoEndComponents()) {
if (requirements.noEndComponents()) {
STORM_LOG_ASSERT(!result.hasUniqueSolution(), "The solver requires to eliminate the end components although the solution is already assumed to be unique.");
STORM_LOG_DEBUG("Scheduling EC elimination, because the solver requires it.");
result.eliminateEndComponents = true;
@ -450,7 +449,7 @@ namespace storm {
}
// If the solver requires an initial scheduler, compute one now.
if (requirements.requires(storm::solver::MinMaxLinearEquationSolverRequirements::Element::ValidInitialScheduler)) {
if (requirements.validInitialScheduler()) {
STORM_LOG_DEBUG("Computing valid scheduler, because the solver requires it.");
result.schedulerHint = computeValidSchedulerHint(env, type, transitionMatrix, backwardTransitions, maybeStates, phiStates, targetStates);
requirements.clearValidInitialScheduler();
@ -462,11 +461,11 @@ namespace storm {
} else if (type == SolutionType::ExpectedRewards) {
requirements.clearLowerBounds();
}
if (requirements.requiresUpperBounds()) {
if (requirements.upperBounds()) {
result.computeUpperBounds = true;
requirements.clearUpperBounds();
}
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "There are unchecked requirements of the solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
} else {
STORM_LOG_DEBUG("Solver has no requirements.");
}
@ -1343,7 +1342,8 @@ namespace storm {
storm::solver::GeneralMinMaxLinearEquationSolverFactory<ValueType> minMaxLinearEquationSolverFactory;
storm::solver::MinMaxLinearEquationSolverRequirements requirements = minMaxLinearEquationSolverFactory.getRequirements(env, true, goal.direction());
requirements.clearBounds();
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Cannot establish requirements for solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
std::vector<ValueType> sspResult(numberOfSspStates);
goal.restrictRelevantValues(statesNotContainedInAnyMec);

16
src/storm/modelchecker/prctl/helper/SymbolicMdpPrctlHelper.cpp
View File

@ -75,20 +75,20 @@ namespace storm {
// Check requirements of solver.
storm::solver::MinMaxLinearEquationSolverRequirements requirements = solver->getRequirements(env, dir);
boost::optional<storm::dd::Bdd<DdType>> initialScheduler;
if (!requirements.empty()) {
if (requirements.requires(storm::solver::MinMaxLinearEquationSolverRequirements::Element::ValidInitialScheduler)) {
if (requirements.hasEnabledRequirement()) {
if (requirements.validInitialScheduler()) {
STORM_LOG_DEBUG("Computing valid scheduler, because the solver requires it.");
initialScheduler = computeValidSchedulerHint(EquationSystemType::UntilProbabilities, model, transitionMatrix, maybeStates, statesWithProbability1);
requirements.clearValidInitialScheduler();
}
requirements.clearBounds();
if (requirements.requiresNoEndComponents()) {
if (requirements.noEndComponents()) {
// Check whether there are end components
if (storm::utility::graph::performProb0E(model, transitionMatrix.notZero(), maybeStates, !maybeStates && model.getReachableStates()).isZero()) {
requirements.clearNoEndComponents();
}
}
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Could not establish requirements of solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
}
if (initialScheduler) {
solver->setInitialScheduler(initialScheduler.get());
@ -246,20 +246,20 @@ namespace storm {
// Check requirements of solver.
storm::solver::MinMaxLinearEquationSolverRequirements requirements = solver->getRequirements(env, dir);
boost::optional<storm::dd::Bdd<DdType>> initialScheduler;
if (!requirements.empty()) {
if (requirements.requires(storm::solver::MinMaxLinearEquationSolverRequirements::Element::ValidInitialScheduler)) {
if (requirements.hasEnabledRequirement()) {
if (requirements.validInitialScheduler()) {
STORM_LOG_DEBUG("Computing valid scheduler, because the solver requires it.");
initialScheduler = computeValidSchedulerHint(EquationSystemType::ExpectedRewards, model, transitionMatrix, maybeStates, targetStates);
requirements.clearValidInitialScheduler();
}
requirements.clearLowerBounds();
if (requirements.requiresNoEndComponents()) {
if (requirements.noEndComponents()) {
// Check whether there are end components
if (storm::utility::graph::performProb0E(model, transitionMatrixBdd, maybeStates, !maybeStates && model.getReachableStates()).isZero()) {
requirements.clearNoEndComponents();
}
}
STORM_LOG_THROW(requirements.empty(), storm::exceptions::UncheckedRequirementException, "Could not establish requirements of solver.");
STORM_LOG_THROW(!requirements.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + requirements.getEnabledRequirementsAsString() + " not checked.");
}
if (initialScheduler) {
solver->setInitialScheduler(initialScheduler.get());

64
src/storm/solver/LinearEquationSolverRequirements.cpp
View File

@ -3,52 +3,78 @@
namespace storm {
namespace solver {
LinearEquationSolverRequirements::LinearEquationSolverRequirements() : lowerBounds(false), upperBounds(false) {
LinearEquationSolverRequirements::LinearEquationSolverRequirements() {
// Intentionally left empty.
}
LinearEquationSolverRequirements& LinearEquationSolverRequirements::requireLowerBounds() {
lowerBounds = true;
LinearEquationSolverRequirements& LinearEquationSolverRequirements::requireLowerBounds(bool critical) {
lowerBoundsRequirement.enable(critical);
return *this;
}
LinearEquationSolverRequirements& LinearEquationSolverRequirements::requireUpperBounds() {
upperBounds = true;
LinearEquationSolverRequirements& LinearEquationSolverRequirements::requireUpperBounds(bool critical) {
upperBoundsRequirement.enable(critical);
return *this;
}
LinearEquationSolverRequirements& LinearEquationSolverRequirements::requireBounds() {
requireLowerBounds();
requireUpperBounds();
LinearEquationSolverRequirements& LinearEquationSolverRequirements::requireBounds(bool critical) {
requireLowerBounds(critical);
requireUpperBounds(critical);
return *this;
}
bool LinearEquationSolverRequirements::requiresLowerBounds() const {
return lowerBounds;
SolverRequirement const& LinearEquationSolverRequirements::lowerBounds() const {
return lowerBoundsRequirement;
}
bool LinearEquationSolverRequirements::requiresUpperBounds() const {
return upperBounds;
SolverRequirement const& LinearEquationSolverRequirements::upperBounds() const {
return upperBoundsRequirement;
}
bool LinearEquationSolverRequirements::requires(Element const& element) const {
SolverRequirement const& LinearEquationSolverRequirements::get(Element const& element) const {
switch (element) {
case Element::LowerBounds: return lowerBounds; break;
case Element::UpperBounds: return upperBounds; break;
case Element::LowerBounds: return lowerBounds(); break;
case Element::UpperBounds: return upperBounds(); break;
}
}
void LinearEquationSolverRequirements::clearLowerBounds() {
lowerBounds = false;
lowerBoundsRequirement.clear();
}
void LinearEquationSolverRequirements::clearUpperBounds() {
upperBounds = false;
upperBoundsRequirement.clear();
}
bool LinearEquationSolverRequirements::empty() const {
return !lowerBounds && !upperBounds;
bool LinearEquationSolverRequirements::hasEnabledRequirement() const {
return lowerBoundsRequirement || upperBoundsRequirement;
}
bool LinearEquationSolverRequirements::hasEnabledCriticalRequirement() const {
return lowerBoundsRequirement.isCritical() || upperBoundsRequirement.isCritical();
}
std::string LinearEquationSolverRequirements::getEnabledRequirementsAsString() const {
std::string res = "[";
bool first = true;
if (lowerBounds()) {
if (!first) { res += ", "; } else {first = false;}
res += "lowerBounds";
if (lowerBounds().isCritical()) {
res += "(mandatory)";
}
}
if (upperBounds()) {
if (!first) { res += ", "; } else {first = false;}
res += "upperBounds";
if (upperBounds().isCritical()) {
res += "(mandatory)";
}
}
res += "]";
return res;
}
}
}

29
src/storm/solver/LinearEquationSolverRequirements.h
View File

@ -1,5 +1,9 @@
#pragma once
#include <string>
#include "storm/solver/SolverRequirement.h"
namespace storm {
namespace solver {
@ -14,22 +18,29 @@ namespace storm {
LinearEquationSolverRequirements();
LinearEquationSolverRequirements& requireLowerBounds();
LinearEquationSolverRequirements& requireUpperBounds();
LinearEquationSolverRequirements& requireBounds();
LinearEquationSolverRequirements& requireLowerBounds(bool critical = true);
LinearEquationSolverRequirements& requireUpperBounds(bool critical = true);
LinearEquationSolverRequirements& requireBounds(bool critical = true);
bool requiresLowerBounds() const;
bool requiresUpperBounds() const;
bool requires(Element const& element) const;
SolverRequirement const& lowerBounds() const;
SolverRequirement const& upperBounds() const;
SolverRequirement const& get(Element const& element) const;
void clearLowerBounds();
void clearUpperBounds();
bool empty() const;
bool hasEnabledRequirement() const;
bool hasEnabledCriticalRequirement() const;
/*!
* Checks whether there are no critical requirements left.
* In case there is a critical requirement left an exception is thrown.
*/
std::string getEnabledRequirementsAsString() const;
private:
bool lowerBounds;
bool upperBounds;
SolverRequirement lowerBoundsRequirement;
SolverRequirement upperBoundsRequirement;
};
}

103
src/storm/solver/MinMaxLinearEquationSolverRequirements.cpp
View File

@ -3,76 +3,76 @@
namespace storm {
namespace solver {
MinMaxLinearEquationSolverRequirements::MinMaxLinearEquationSolverRequirements(LinearEquationSolverRequirements const& linearEquationSolverRequirements) : noEndComponents(false), validInitialScheduler(false), lowerBounds(linearEquationSolverRequirements.requiresLowerBounds()), upperBounds(linearEquationSolverRequirements.requiresUpperBounds()) {
MinMaxLinearEquationSolverRequirements::MinMaxLinearEquationSolverRequirements(LinearEquationSolverRequirements const& linearEquationSolverRequirements) : lowerBoundsRequirement(linearEquationSolverRequirements.lowerBounds()), upperBoundsRequirement(linearEquationSolverRequirements.upperBounds()) {
// Intentionally left empty.
}
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireNoEndComponents() {
noEndComponents = true;
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireNoEndComponents(bool critical) {
noEndComponentsRequirement.enable(critical);
return *this;
}
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireValidInitialScheduler() {
validInitialScheduler = true;
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireValidInitialScheduler(bool critical) {
validInitialSchedulerRequirement.enable(critical);
return *this;
}
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireLowerBounds() {
lowerBounds = true;
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireLowerBounds(bool critical) {
lowerBoundsRequirement.enable(critical);
return *this;
}
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireUpperBounds() {
upperBounds = true;
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireUpperBounds(bool critical) {
upperBoundsRequirement.enable(critical);
return *this;
}
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireBounds() {
requireLowerBounds();
requireUpperBounds();
MinMaxLinearEquationSolverRequirements& MinMaxLinearEquationSolverRequirements::requireBounds(bool critical) {
requireLowerBounds(critical);
requireUpperBounds(critical);
return *this;
}
bool MinMaxLinearEquationSolverRequirements::requiresNoEndComponents() const {
return noEndComponents;
SolverRequirement const& MinMaxLinearEquationSolverRequirements::noEndComponents() const {
return noEndComponentsRequirement;
}
bool MinMaxLinearEquationSolverRequirements::requiresValidInitialScheduler() const {
return validInitialScheduler;
SolverRequirement const& MinMaxLinearEquationSolverRequirements::validInitialScheduler() const {
return validInitialSchedulerRequirement;
}
bool MinMaxLinearEquationSolverRequirements::requiresLowerBounds() const {
return lowerBounds;
SolverRequirement const& MinMaxLinearEquationSolverRequirements::lowerBounds() const {
return lowerBoundsRequirement;
}
bool MinMaxLinearEquationSolverRequirements::requiresUpperBounds() const {
return upperBounds;
SolverRequirement const& MinMaxLinearEquationSolverRequirements::upperBounds() const {
return upperBoundsRequirement;
}
bool MinMaxLinearEquationSolverRequirements::requires(Element const& element) const {
SolverRequirement const& MinMaxLinearEquationSolverRequirements::get(Element const& element) const {
switch (element) {
case Element::NoEndComponents: return noEndComponents; break;
case Element::ValidInitialScheduler: return validInitialScheduler; break;
case Element::LowerBounds: return lowerBounds; break;
case Element::UpperBounds: return upperBounds; break;
case Element::NoEndComponents: return noEndComponents(); break;
case Element::ValidInitialScheduler: return validInitialScheduler(); break;
case Element::LowerBounds: return lowerBounds(); break;
case Element::UpperBounds: return upperBounds(); break;
}
}
void MinMaxLinearEquationSolverRequirements::clearNoEndComponents() {
noEndComponents = false;
validInitialScheduler = false;
noEndComponentsRequirement.clear();
validInitialSchedulerRequirement.clear();
}
void MinMaxLinearEquationSolverRequirements::clearValidInitialScheduler() {
validInitialScheduler = false;
validInitialSchedulerRequirement.clear();
}
void MinMaxLinearEquationSolverRequirements::clearLowerBounds() {
lowerBounds = false;
lowerBoundsRequirement.clear();
}
void MinMaxLinearEquationSolverRequirements::clearUpperBounds() {
upperBounds = false;
upperBoundsRequirement.clear();
}
void MinMaxLinearEquationSolverRequirements::clearBounds() {
@ -80,8 +80,47 @@ namespace storm {
clearUpperBounds();
}
bool MinMaxLinearEquationSolverRequirements::empty() const {
return !noEndComponents && !validInitialScheduler && !lowerBounds && !upperBounds;
bool MinMaxLinearEquationSolverRequirements::hasEnabledRequirement() const {
return noEndComponentsRequirement || validInitialSchedulerRequirement || lowerBoundsRequirement || upperBoundsRequirement;
}
bool MinMaxLinearEquationSolverRequirements::hasEnabledCriticalRequirement() const {
return noEndComponentsRequirement.isCritical() || validInitialSchedulerRequirement.isCritical() || lowerBoundsRequirement.isCritical() || upperBoundsRequirement.isCritical();
}
std::string MinMaxLinearEquationSolverRequirements::getEnabledRequirementsAsString() const {
std::string res = "[";
bool first = true;
if (noEndComponents()) {
if (!first) { res += ", "; } else {first = false;}
res += "NoEndComponents";
if (noEndComponents().isCritical()) {
res += "(mandatory)";
}
}
if (validInitialScheduler()) {
if (!first) { res += ", "; } else {first = false;}
res += "validInitialScheduler";
if (validInitialScheduler().isCritical()) {
res += "(mandatory)";
}
}
if (lowerBounds()) {
if (!first) { res += ", "; } else {first = false;}
res += "lowerBounds";
if (lowerBounds().isCritical()) {
res += "(mandatory)";
}
}
if (upperBounds()) {
if (!first) { res += ", "; } else {first = false;}
res += "upperBounds";
if (upperBounds().isCritical()) {
res += "(mandatory)";
}
}
res += "]";
return res;
}
}

41
src/storm/solver/MinMaxLinearEquationSolverRequirements.h
View File

@ -1,6 +1,9 @@
#pragma once
#include <string>
#include "storm/solver/LinearEquationSolverRequirements.h"
#include "storm/solver/SolverRequirement.h"
namespace storm {
namespace solver {
@ -20,19 +23,21 @@ namespace storm {
UpperBounds
};
// The type of a requirement.
MinMaxLinearEquationSolverRequirements(LinearEquationSolverRequirements const& linearEquationSolverRequirements = LinearEquationSolverRequirements());
MinMaxLinearEquationSolverRequirements& requireNoEndComponents();
MinMaxLinearEquationSolverRequirements& requireValidInitialScheduler();
MinMaxLinearEquationSolverRequirements& requireLowerBounds();
MinMaxLinearEquationSolverRequirements& requireUpperBounds();
MinMaxLinearEquationSolverRequirements& requireBounds();
MinMaxLinearEquationSolverRequirements& requireNoEndComponents(bool critical = true);
MinMaxLinearEquationSolverRequirements& requireValidInitialScheduler(bool critical = true);
MinMaxLinearEquationSolverRequirements& requireLowerBounds(bool critical = true);
MinMaxLinearEquationSolverRequirements& requireUpperBounds(bool critical = true);
MinMaxLinearEquationSolverRequirements& requireBounds(bool critical = true);
bool requiresNoEndComponents() const;
bool requiresValidInitialScheduler() const;
bool requiresLowerBounds() const;
bool requiresUpperBounds() const;
bool requires(Element const& element) const;
SolverRequirement const& noEndComponents() const;
SolverRequirement const& validInitialScheduler() const;
SolverRequirement const& lowerBounds() const;
SolverRequirement const& upperBounds() const;
SolverRequirement const& get(Element const& element) const;
void clearNoEndComponents();
void clearValidInitialScheduler();
@ -40,13 +45,19 @@ namespace storm {
void clearUpperBounds();
void clearBounds();
bool empty() const;
bool hasEnabledRequirement() const;
bool hasEnabledCriticalRequirement() const;
/*!
* Returns a string that enumerates the enabled requirements
*/
std::string getEnabledRequirementsAsString() const;
private:
bool noEndComponents;
bool validInitialScheduler;
bool lowerBounds;
bool upperBounds;
SolverRequirement noEndComponentsRequirement;
SolverRequirement validInitialSchedulerRequirement;
SolverRequirement lowerBoundsRequirement;
SolverRequirement upperBoundsRequirement;
};
}

32
src/storm/solver/SolverRequirement.cpp
View File

@ -0,0 +1,32 @@
#include "storm/solver/SolverRequirement.h"
#include <vector>
#include "storm/utility/vector.h"
namespace storm {
namespace solver {
SolverRequirement::SolverRequirement() : enabled(false), critical(false) {
// Intentionally left empty
}
SolverRequirement::operator bool() const {
return enabled;
}
void SolverRequirement::enable(bool critical) {
this->enabled = true;
this->critical = critical;
}
void SolverRequirement::clear() {
enabled = false;
critical = false;
}
bool SolverRequirement::isCritical() const {
return this->critical;
}
}
}

39
src/storm/solver/SolverRequirement.h
View File

@ -0,0 +1,39 @@
#pragma once
namespace storm {
namespace solver {
class SolverRequirement {
public:
SolverRequirement();
SolverRequirement(SolverRequirement const& other) = default;
/*!
* Returns true if this is a requirement of the considered solver.
*/
operator bool() const;
/*!
* Enables this requirement.
* @param critical if set, it is assumed that the solver will fail in case this requirement is not met
*/
void enable(bool critical = true);
/*!
* Clears this requirement.
*/
void clear();
/*!
* Returns true if the solver fails in case this requirement is not met.
*/
bool isCritical() const;
private:
bool enabled;
bool critical;
};
}
}

16
src/storm/solver/TopologicalMinMaxLinearEquationSolver.cpp
View File

@ -8,7 +8,7 @@
#include "storm/exceptions/InvalidStateException.h"
#include "storm/exceptions/InvalidEnvironmentException.h"
#include "storm/exceptions/UnexpectedException.h"
#include "storm/exceptions/UnmetRequirementException.h"
#include "storm/exceptions/UncheckedRequirementException.h"
namespace storm {
namespace solver {
@ -184,13 +184,13 @@ namespace storm {
this->sccSolver->setInitialScheduler(std::move(choices));
}
auto req = this->sccSolver->getRequirements(sccSolverEnvironment, dir);
if (req.requiresUpperBounds() && this->hasUpperBound()) {
if (req.upperBounds() && this->hasUpperBound()) {
req.clearUpperBounds();
}
if (req.requiresLowerBounds() && this->hasLowerBound()) {
if (req.lowerBounds() && this->hasLowerBound()) {
req.clearLowerBounds();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UnmetRequirementException, "Requirements of underlying solver not met.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
this->sccSolver->setRequirementsChecked(true);
bool res = this->sccSolver->solveEquations(sccSolverEnvironment, dir, x, b);
@ -252,16 +252,16 @@ namespace storm {
// Requirements
auto req = this->sccSolver->getRequirements(sccSolverEnvironment, dir);
if (req.requiresUpperBounds() && this->hasUpperBound()) {
if (req.upperBounds() && this->hasUpperBound()) {
req.clearUpperBounds();
}
if (req.requiresLowerBounds() && this->hasLowerBound()) {
if (req.lowerBounds() && this->hasLowerBound()) {
req.clearLowerBounds();
}
if (req.requiresValidInitialScheduler() && this->hasInitialScheduler()) {
if (req.validInitialScheduler() && this->hasInitialScheduler()) {
req.clearValidInitialScheduler();
}
STORM_LOG_THROW(req.empty(), storm::exceptions::UnmetRequirementException, "Requirements of underlying solver not met.");
STORM_LOG_THROW(!req.hasEnabledCriticalRequirement(), storm::exceptions::UncheckedRequirementException, "Solver requirements " + req.getEnabledRequirementsAsString() + " not checked.");
this->sccSolver->setRequirementsChecked(true);
// Invoke scc solver

2
src/test/storm/solver/MinMaxLinearEquationSolverTest.cpp
View File

@ -152,7 +152,7 @@ namespace {
solver->setBounds(this->parseNumber("0"), this->parseNumber("2"));
storm::solver::MinMaxLinearEquationSolverRequirements req = solver->getRequirements(this->env());
req.clearBounds();
ASSERT_TRUE(req.empty());
ASSERT_FALSE(req.hasEnabledRequirement());
ASSERT_NO_THROW(solver->solveEquations(this->env(), storm::OptimizationDirection::Minimize, x, b));
EXPECT_NEAR(x[0], this->parseNumber("0.5"), this->precision());

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