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#include "storm/builder/DftSmtBuilder.h"
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#include "storm/exceptions/NotImplementedException.h"
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namespace storm { |
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namespace builder { |
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template <typename ValueType> |
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DFTSMTBuilder<ValueType>::DFTSMTBuilder() : manager(std::make_shared<storm::expressions::ExpressionManager>()) { |
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solver = storm::utility::solver::SmtSolverFactory().create(*manager); |
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} |
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template <typename ValueType> |
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void DFTSMTBuilder<ValueType>::convertToSMT(storm::storage::DFT<ValueType> const& dft) { |
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std::cout << "Convert DFT to SMT" << std::endl; |
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timeMax = manager->integer(dft.nrBasicElements()); |
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timeFailSafe = manager->integer(dft.nrBasicElements() + 1); |
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timeZero = manager->integer(0); |
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// Convert all elements
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for (size_t i = 0; i < dft.nrElements(); ++i) { |
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std::shared_ptr<storm::storage::DFTElement<ValueType> const> element = dft.getElement(i); |
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std::cout << "Consider " << element->toString() << std::endl; |
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if (element->isBasicElement()) { |
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storm::expressions::Variable varBE = convert(std::static_pointer_cast<storm::storage::DFTBE<ValueType> const>(element)); |
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varsBE.push_back(varBE); |
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} else if (element->isGate()) { |
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storm::expressions::Variable varGate = convert(std::static_pointer_cast<storm::storage::DFTGate<ValueType> const>(element)); |
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if (dft.getTopLevelIndex() == i) { |
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topLevel = varGate; |
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} |
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} else if (element->isDependency()) { |
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convert(std::static_pointer_cast<storm::storage::DFTDependency<ValueType> const>(element)); |
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} else if (element->isRestriction()) { |
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convert(std::static_pointer_cast<storm::storage::DFTRestriction<ValueType> const>(element)); |
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} |
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} |
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// No simultaneous fails can occur
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for (size_t i = 0; i < varsBE.size() - 1; ++i) { |
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storm::expressions::Expression be = varsBE[i]; |
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for (size_t j = i + 1; j < varsBE.size(); ++j) { |
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storm::expressions::Expression assertion = be != varsBE[j]; |
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solver->add(assertion); |
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} |
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} |
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// For every time-point one BE must fail
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for (size_t time = 1; time <= dft.nrBasicElements(); ++time) { |
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storm::expressions::Expression exprTime = manager->integer(time); |
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storm::expressions::Expression assertion = varsBE[0] == exprTime; |
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for (size_t i = 1; i < varsBE.size(); ++i) { |
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assertion = assertion || varsBE[i] == exprTime; |
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} |
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assertion = assertion || topLevel <= exprTime; |
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solver->add(assertion); |
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} |
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} |
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template <typename ValueType> |
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storm::expressions::Variable DFTSMTBuilder<ValueType>::convert(std::shared_ptr<storm::storage::DFTBE<ValueType> const> const& be) { |
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storm::expressions::Variable var = manager->declareIntegerVariable(be->name()); |
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storm::expressions::Expression assertion = timeZero < var && var < timeFailSafe; |
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solver->add(assertion); |
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return var; |
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} |
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template <typename ValueType> |
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storm::expressions::Variable DFTSMTBuilder<ValueType>::convert(std::shared_ptr<storm::storage::DFTGate<ValueType> const> const& gate) { |
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storm::expressions::Variable var = manager->declareIntegerVariable(gate->name()); |
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storm::expressions::Expression assertion = timeZero < var && var <= timeFailSafe; |
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solver->add(assertion); |
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return var; |
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} |
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template <typename ValueType> |
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storm::expressions::Variable DFTSMTBuilder<ValueType>::convert(std::shared_ptr<storm::storage::DFTDependency<ValueType> const> const& dependency) { |
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STORM_LOG_THROW(false, storm::exceptions::NotImplementedException, "The dependency cannot be converted into SMT."); |
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} |
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template <typename ValueType> |
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storm::expressions::Variable DFTSMTBuilder<ValueType>::convert(std::shared_ptr<storm::storage::DFTRestriction<ValueType> const> const& restriction) { |
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STORM_LOG_THROW(false, storm::exceptions::NotImplementedException, "The restriction cannot be converted into SMT."); |
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} |
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template <typename ValueType> |
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bool DFTSMTBuilder<ValueType>::check() const { |
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std::cout << "Check" << std::endl; |
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storm::solver::SmtSolver::CheckResult result = solver->check(); |
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switch (result) { |
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case solver::SmtSolver::CheckResult::Sat: |
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{ |
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std::cout << "SAT with model:" << std::endl; |
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std::shared_ptr<storm::solver::SmtSolver::ModelReference> model = solver->getModel(); |
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for (auto const& pair : *manager) { |
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std::cout << pair.first.getName() << "->" << model->getIntegerValue(pair.first) << std::endl; |
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} |
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return true; |
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} |
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case solver::SmtSolver::CheckResult::Unsat: |
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return false; |
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case solver::SmtSolver::CheckResult::Unknown: |
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default: |
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STORM_LOG_ASSERT(false, "Result is unknown."); |
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return false; |
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} |
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} |
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// Explicitly instantiate the class.
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template class DFTSMTBuilder<double>; |
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#ifdef STORM_HAVE_CARL
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template class DFTSMTBuilder<storm::RationalFunction>; |
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#endif
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} // namespace builder
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} // namespace storm
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sjunges
9 years ago
Sebastian Junges
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