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merging of equivalent states as preprocessing #1016

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c54ce9f
merging of equivalent states as preprocessing
tquatmann Aug 14, 2026
588933c
Fix unused variable.
tquatmann Aug 14, 2026
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15 changes: 15 additions & 0 deletions src/storm-cli-utilities/model-handling.h
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Original file line number Diff line number Diff line change
Expand Up @@ -735,6 +735,21 @@ std::pair<std::shared_ptr<storm::models::ModelBase>, bool> preprocessModel(std::
STORM_PRINT_AND_LOG("Transition matrix hash after permuting: " << result.first->getTransitionMatrix().hash() << ".\n");
}

// Merging of states should be done before applying bisimulation as this order leads to the smallest quotient
if (transformationSettings.isMergeEquivalentStatesSet()) {
auto formulas = createFormulasToRespect(input.properties);
if (formulas.size() != 1) {
STORM_LOG_WARN("Skipping merging of equivalent states as it requires exactly one input property. " << formulas.size()
<< " properties given instead.");
} else if (auto mergedModel = storm::api::mergeEquivalentStatesForFormula<ValueType>(result.first, *formulas.front())) {
STORM_LOG_INFO("Merged target/sink states relevant for the considered property '" << *formulas.front() << "'.");
result.first = mergedModel;
result.second = true;
} else {
STORM_LOG_INFO("Merging equivalent states is not applicable for the considered property '" << *formulas.front() << "'.");
}
}

if (result.first->isOfType(storm::models::ModelType::MarkovAutomaton)) {
result.first = preprocessSparseMarkovAutomaton(result.first->template as<storm::models::sparse::MarkovAutomaton<ValueType>>());
result.second = true;
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2 changes: 0 additions & 2 deletions src/storm-pars-cli/sampling.h
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Expand Up @@ -24,8 +24,6 @@
#include "storm-pars/settings/modules/RegionSettings.h"

#include "storm-pars/derivative/GradientDescentMethod.h"
#include "storm-pars/transformer/SparseParametricDtmcSimplifier.h"
#include "storm-pars/transformer/SparseParametricMdpSimplifier.h"

#include "storm-pars/utility/parametric.h"

Expand Down
7 changes: 3 additions & 4 deletions src/storm-pars-cli/storm-pars.cpp
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Expand Up @@ -19,8 +19,7 @@
#include "storm-pars/settings/modules/SamplingSettings.h"
#include "storm-pars/transformer/BigStep.h"
#include "storm-pars/transformer/BinaryDtmcTransformer.h"
#include "storm-pars/transformer/SparseParametricDtmcSimplifier.h"
#include "storm-pars/transformer/SparseParametricMdpSimplifier.h"
#include "storm-pars/transformer/SparseParametricModelSimplifier.h"
#include "storm-pars/utility/parametric.h"
#include "storm/api/storm.h"
#include "storm/exceptions/BaseException.h"
Expand Down Expand Up @@ -159,7 +158,7 @@ std::shared_ptr<storm::models::ModelBase> simplifyModel(std::shared_ptr<storm::m
storm::utility::Stopwatch simplifyingWatch(true);
std::shared_ptr<storm::models::ModelBase> result;
if (model->isOfType(storm::models::ModelType::Dtmc)) {
storm::transformer::SparseParametricDtmcSimplifier<storm::models::sparse::Dtmc<ValueType>> simplifier(
storm::transformer::SparseParametricModelSimplifier<storm::models::sparse::Dtmc<ValueType>> simplifier(
*(model->template as<storm::models::sparse::Dtmc<ValueType>>()));

std::vector<std::shared_ptr<storm::logic::Formula const>> formulas = storm::api::extractFormulasFromProperties(input.properties);
Expand All @@ -168,7 +167,7 @@ std::shared_ptr<storm::models::ModelBase> simplifyModel(std::shared_ptr<storm::m
STORM_LOG_THROW(simplifier.simplify(*(formulas[0])), storm::exceptions::UnexpectedException, "Simplifying the model was not successfull.");
result = simplifier.getSimplifiedModel();
} else if (model->isOfType(storm::models::ModelType::Mdp)) {
storm::transformer::SparseParametricMdpSimplifier<storm::models::sparse::Mdp<ValueType>> simplifier(
storm::transformer::SparseParametricModelSimplifier<storm::models::sparse::Mdp<ValueType>> simplifier(
*(model->template as<storm::models::sparse::Mdp<ValueType>>()));

std::vector<std::shared_ptr<storm::logic::Formula const>> formulas = storm::api::extractFormulasFromProperties(input.properties);
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4 changes: 2 additions & 2 deletions src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp
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Expand Up @@ -9,7 +9,7 @@
#include "storm-pars/modelchecker/region/monotonicity/OrderBasedMonotonicityBackend.h"
#include "storm-pars/transformer/BigStep.h"
#include "storm-pars/transformer/IntervalEndComponentPreserver.h"
#include "storm-pars/transformer/SparseParametricDtmcSimplifier.h"
#include "storm-pars/transformer/SparseParametricModelSimplifier.h"
#include "storm/adapters/RationalFunctionAdapter.h"
#include "storm/adapters/RationalFunctionForward.h"
#include "storm/environment/Environment.h"
Expand Down Expand Up @@ -93,7 +93,7 @@ void SparseDtmcParameterLiftingModelChecker<SparseModelType, ConstantType, Robus
reset();

if (allowModelSimplifications && graphPreserving) {
auto simplifier = storm::transformer::SparseParametricDtmcSimplifier<SparseModelType>(*dtmc);
auto simplifier = storm::transformer::SparseParametricModelSimplifier<SparseModelType>(*dtmc);
simplifier.setPreserveParametricTransitions(true);
STORM_LOG_THROW(simplifier.simplify(checkTask.getFormula()), storm::exceptions::UnexpectedException, "Simplifying the model was not successfull.");
this->parametricModel = simplifier.getSimplifiedModel();
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4 changes: 2 additions & 2 deletions src/storm-pars/modelchecker/region/SparseMdpParameterLiftingModelChecker.cpp
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Expand Up @@ -2,7 +2,7 @@

#include "storm-pars/modelchecker/region/AnnotatedRegion.h"
#include "storm-pars/modelchecker/region/monotonicity/MonotonicityBackend.h"
#include "storm-pars/transformer/SparseParametricMdpSimplifier.h"
#include "storm-pars/transformer/SparseParametricModelSimplifier.h"
#include "storm/adapters/RationalFunctionAdapter.h"
#include "storm/exceptions/InvalidPropertyException.h"
#include "storm/exceptions/NotImplementedException.h"
Expand Down Expand Up @@ -68,7 +68,7 @@ void SparseMdpParameterLiftingModelChecker<SparseModelType, ConstantType>::speci
reset();

if (allowModelSimplifications) {
auto simplifier = storm::transformer::SparseParametricMdpSimplifier<SparseModelType>(*mdp);
auto simplifier = storm::transformer::SparseParametricModelSimplifier<SparseModelType>(*mdp);
STORM_LOG_THROW(simplifier.simplify(checkTask.getFormula()), storm::exceptions::UnexpectedException, "Simplifying the model was not successfull.");
this->parametricModel = simplifier.getSimplifiedModel();
this->specifyFormula(env, checkTask.substituteFormula(*simplifier.getSimplifiedFormula()));
Expand Down
18 changes: 5 additions & 13 deletions src/storm-pars/modelchecker/region/ValidatingSparseParameterLiftingModelChecker.cpp
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Expand Up @@ -2,8 +2,7 @@

#include "storm-pars/modelchecker/region/AnnotatedRegion.h"
#include "storm-pars/modelchecker/region/monotonicity/MonotonicityBackend.h"
#include "storm-pars/transformer/SparseParametricDtmcSimplifier.h"
#include "storm-pars/transformer/SparseParametricMdpSimplifier.h"
#include "storm-pars/transformer/SparseParametricModelSimplifier.h"
#include "storm/adapters/RationalFunctionAdapter.h"
#include "storm/exceptions/NotImplementedException.h"
#include "storm/exceptions/NotSupportedException.h"
Expand Down Expand Up @@ -50,17 +49,10 @@ void ValidatingSparseParameterLiftingModelChecker<SparseModelType, ImpreciseType

if (allowModelSimplifications) {
auto dtmcOrMdp = parametricModel->template as<SparseModelType>();
if constexpr (IsMDP) {
auto simplifier = storm::transformer::SparseParametricMdpSimplifier<SparseModelType>(*dtmcOrMdp);
STORM_LOG_THROW(simplifier.simplify(checkTask.getFormula()), storm::exceptions::UnexpectedException, "Simplifying the model was not successfull.");
auto simplifiedTask = checkTask.substituteFormula(*simplifier.getSimplifiedFormula());
specifyUnderlyingCheckers(simplifier.getSimplifiedModel(), simplifiedTask);
} else {
auto simplifier = storm::transformer::SparseParametricDtmcSimplifier<SparseModelType>(*dtmcOrMdp);
STORM_LOG_THROW(simplifier.simplify(checkTask.getFormula()), storm::exceptions::UnexpectedException, "Simplifying the model was not successfull.");
auto simplifiedTask = checkTask.substituteFormula(*simplifier.getSimplifiedFormula());
specifyUnderlyingCheckers(simplifier.getSimplifiedModel(), simplifiedTask);
}
auto simplifier = storm::transformer::SparseParametricModelSimplifier<SparseModelType>(*dtmcOrMdp);
STORM_LOG_THROW(simplifier.simplify(checkTask.getFormula()), storm::exceptions::UnexpectedException, "Simplifying the model was not successfull.");
auto simplifiedTask = checkTask.substituteFormula(*simplifier.getSimplifiedFormula());
specifyUnderlyingCheckers(simplifier.getSimplifiedModel(), simplifiedTask);
} else {
specifyUnderlyingCheckers(parametricModel, checkTask);
}
Expand Down
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