major changes to shield handling

- Introduced OptimalPre and OptimalPost shields
 - Renamed *Safety to PreShield and PostShield
 - Introduced min case for shields
 - fixed coalition states in shield handling

src/storm-parsers/parser/FormulaParserGrammar.cpp

@@ -184,16 +184,21 @@ namespace storm {
 
             shieldExpression.name("shield expression");
 
-            shieldingType = (qi::lit("PreSafety")[qi::_val = storm::logic::ShieldingType::PreSafety]   |
-                             qi::lit("PostSafety")[qi::_val = storm::logic::ShieldingType::PostSafety] |
-                             qi::lit("Optimal")[qi::_val = storm::logic::ShieldingType::Optimal]) > -qi::lit("Shield");
+            shieldingType = (qi::lit("PreSafety")[qi::_val = storm::logic::ShieldingType::PreSafety]      |
+                             qi::lit("PostSafety")[qi::_val = storm::logic::ShieldingType::PostSafety]    |
+                             qi::lit("OptimalPre")[qi::_val = storm::logic::ShieldingType::OptimalPre]    |
+                             qi::lit("OptimalPost")[qi::_val = storm::logic::ShieldingType::OptimalPost]  |
+                             qi::lit("Optimal")[qi::_val = storm::logic::ShieldingType::OptimalPost])       // backwards compatability, will be disabled in the future
+                          > -qi::lit("Shield");
             shieldingType.name("shielding type");
 
-            probability = qi::double_[qi::_pass = (qi::_1 >= 0) & (qi::_1 <= 1.0), qi::_val = qi::_1 ];
-            probability.name("double between 0 and 1");
+            //probability = qi::double_[qi::_pass = (qi::_1 >= 0) & (qi::_1 <= 1.0), qi::_val = qi::_1 ];
+            //probability.name("double between 0 and 1");
+            comparisonValue = qi::double_[qi::_val = qi::_1 ];
+            comparisonValue.name("double comparison value");
 
             shieldComparison = ((qi::lit("lambda")[qi::_a = storm::logic::ShieldComparison::Relative] |
-                                 qi::lit("gamma")[qi::_a = storm::logic::ShieldComparison::Absolute]) > qi::lit("=") > probability)[qi::_val = phoenix::bind(&FormulaParserGrammar::createShieldComparisonStruct, phoenix::ref(*this), qi::_a, qi::_1)];
+                                 qi::lit("gamma")[qi::_a = storm::logic::ShieldComparison::Absolute]) > qi::lit("=") > comparisonValue)[qi::_val = phoenix::bind(&FormulaParserGrammar::createShieldComparisonStruct, phoenix::ref(*this), qi::_a, qi::_1)];
             shieldComparison.name("shield comparison type");
 
 #pragma clang diagnostic push
@@ -649,10 +654,9 @@ namespace storm {
 
         std::shared_ptr<storm::logic::ShieldExpression const> FormulaParserGrammar::createShieldExpression(storm::logic::ShieldingType type, std::string name, boost::optional<std::pair<storm::logic::ShieldComparison, double>> comparisonStruct) {
             if(comparisonStruct.is_initialized()) {
-                STORM_LOG_WARN_COND(type != storm::logic::ShieldingType::Optimal , "Comparison for optimal shield will be ignored.");
                 return std::shared_ptr<storm::logic::ShieldExpression>(new storm::logic::ShieldExpression(type, name, comparisonStruct.get().first, comparisonStruct.get().second));
             } else {
-                STORM_LOG_THROW(type == storm::logic::ShieldingType::Optimal , storm::exceptions::WrongFormatException, "Construction of safety shield needs a comparison parameter (lambda or gamma)");
+                STORM_LOG_INFO("Construction of shield without a comparison parameter (lambda or gamma) will default to 'lambda=0'");
                 return std::shared_ptr<storm::logic::ShieldExpression>(new storm::logic::ShieldExpression(type, name));
             }
         }

src/storm-parsers/parser/FormulaParserGrammar.h

@@ -237,7 +237,7 @@ namespace storm {
             // Shielding properties
             qi::rule<Iterator, std::shared_ptr<storm::logic::ShieldExpression const>(), Skipper> shieldExpression;
             qi::rule<Iterator, storm::logic::ShieldingType, Skipper> shieldingType;
-            qi::rule<Iterator, double, Skipper> probability;
+            qi::rule<Iterator, double, Skipper> comparisonValue;
             qi::rule<Iterator, std::pair<storm::logic::ShieldComparison, double>, qi::locals<storm::logic::ShieldComparison>, Skipper> shieldComparison;
 
             // Start symbol

src/storm/logic/ShieldExpression.cpp

@@ -26,8 +26,12 @@ namespace storm {
             return type == storm::logic::ShieldingType::PostSafety;
         }
 
-        bool ShieldExpression::isOptimalShield() const {
-            return type == storm::logic::ShieldingType::Optimal;
+        bool ShieldExpression::isOptimalPreShield() const {
+            return type == storm::logic::ShieldingType::OptimalPre;
+        }
+
+        bool ShieldExpression::isOptimalPostShield() const {
+            return type == storm::logic::ShieldingType::OptimalPost;
         }
 
         double ShieldExpression::getValue() const {
@@ -36,9 +40,10 @@ namespace storm {
 
         std::string ShieldExpression::typeToString() const {
             switch(type) {
-                case storm::logic::ShieldingType::PostSafety: return "PostSafety";
-                case storm::logic::ShieldingType::PreSafety:  return "PreSafety";
-                case storm::logic::ShieldingType::Optimal:    return "Optimal";
+                case storm::logic::ShieldingType::PostSafety: return "Post";
+                case storm::logic::ShieldingType::PreSafety:  return "Pre";
+                case storm::logic::ShieldingType::OptimalPre:    return "OptimalPre";
+                case storm::logic::ShieldingType::OptimalPost:    return "OptimalPost";
             }
         }
 
@@ -57,14 +62,13 @@ namespace storm {
             std::string prettyString = "";
             std::string comparisonType = isRelative() ? "relative" : "absolute";
             switch(type) {
-                case storm::logic::ShieldingType::PostSafety: prettyString += "Post-Safety"; break;
-                case storm::logic::ShieldingType::PreSafety:  prettyString += "Pre-Safety"; break;
-                case storm::logic::ShieldingType::Optimal:    prettyString += "Optimal"; break;
+                case storm::logic::ShieldingType::PostSafety:  prettyString += "Post-Safety"; break;
+                case storm::logic::ShieldingType::PreSafety:   prettyString += "Pre-Safety"; break;
+                case storm::logic::ShieldingType::OptimalPre:  prettyString += "Optimal-Pre"; break;
+                case storm::logic::ShieldingType::OptimalPost: prettyString += "Optimal-Post"; break;
             }
             prettyString += "-Shield ";
-            if(!(type == storm::logic::ShieldingType::Optimal)) {
-                prettyString += "with " + comparisonType + " comparison (" + comparisonToString() + " = " + std::to_string(value) + "):";
-            }
+            prettyString += "with " + comparisonType + " comparison (" + comparisonToString() + " = " + std::to_string(value) + "):";
             return prettyString;
         }
 

src/storm/logic/ShieldExpression.h

@@ -9,7 +9,8 @@ namespace storm {
         enum class ShieldingType {
             PostSafety,
             PreSafety,
-            Optimal
+            OptimalPre,
+            OptimalPost
         };
 
         enum class ShieldComparison { Absolute, Relative };
@@ -23,7 +24,8 @@ namespace storm {
             bool isRelative() const;
             bool isPreSafetyShield() const;
             bool isPostSafetyShield() const;
-            bool isOptimalShield() const;
+            bool isOptimalPreShield() const;
+            bool isOptimalPostShield() const;
 
             double getValue() const;
 
@@ -36,8 +38,8 @@ namespace storm {
 
         private:
             ShieldingType type;
-            ShieldComparison comparison;
-            double value;
+            ShieldComparison comparison = ShieldComparison::Relative;
+            double value = 0;
 
             std::string filename;
         };

src/storm/shields/AbstractShield.h

@@ -21,9 +21,13 @@ namespace tempest {
         namespace utility {
             template<typename ValueType, typename Compare, bool relative>
             struct ChoiceFilter {
-                bool operator()(ValueType v, ValueType max, double shieldValue) {
+                bool operator()(ValueType v, ValueType opt, double shieldValue) {
                     Compare compare;
-                    if(relative) return compare(v, max * shieldValue);
+                    if(relative && std::is_same<Compare, storm::utility::ElementLessEqual<ValueType>>::value) {
+                        return compare(v, opt + opt * shieldValue);
+                    } else if(relative && std::is_same<Compare, storm::utility::ElementGreaterEqual<ValueType>>::value) {
+                        return compare(v, opt * shieldValue);
+                    }
                     else return compare(v, shieldValue);
                 }
             };

src/storm/shields/OptimalShield.cpp

@@ -6,27 +6,65 @@ namespace tempest {
     namespace shields {
 
         template<typename ValueType, typename IndexType>
-        OptimalShield<ValueType, IndexType>::OptimalShield(std::vector<IndexType> const& rowGroupIndices, std::vector<uint64_t> const& precomputedChoices, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates), precomputedChoices(precomputedChoices) {
+        OptimalShield<ValueType, IndexType>::OptimalShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates), choiceValues(choiceValues) {
             // Intentionally left empty.
         }
 
         template<typename ValueType, typename IndexType>
-        storm::storage::OptimalScheduler<ValueType> OptimalShield<ValueType, IndexType>::construct() {
-            storm::storage::OptimalScheduler<ValueType> shield(this->rowGroupIndices.size() - 1);
-            // TODO Needs fixing as soon as we support MDPs
+        storm::storage::PostScheduler<ValueType> OptimalShield<ValueType, IndexType>::construct() {
+            if (this->getOptimizationDirection() == storm::OptimizationDirection::Minimize) {
+                if(this->shieldingExpression->isRelative()) {
+                    return constructWithCompareType<storm::utility::ElementLessEqual<ValueType>, true>();
+                } else {
+                    return constructWithCompareType<storm::utility::ElementLessEqual<ValueType>, false>();
+                }
+            } else {
+                if(this->shieldingExpression->isRelative()) {
+                    return constructWithCompareType<storm::utility::ElementGreaterEqual<ValueType>, true>();
+                } else {
+                    return constructWithCompareType<storm::utility::ElementGreaterEqual<ValueType>, false>();
+                }
+            }
+        }
+
+        template<typename ValueType, typename IndexType>
+        template<typename Compare, bool relative>
+        storm::storage::PostScheduler<ValueType> OptimalShield<ValueType, IndexType>::constructWithCompareType() {
+            tempest::shields::utility::ChoiceFilter<ValueType, Compare, relative> choiceFilter;
+            storm::storage::PostScheduler<ValueType> shield(this->rowGroupIndices.size() - 1, this->computeRowGroupSizes());
+            auto choice_it = this->choiceValues.begin();
             if(this->coalitionStates.is_initialized()) {
-                this->relevantStates = ~this->relevantStates;
+                this->relevantStates &= this->coalitionStates.get();
             }
             for(uint state = 0; state < this->rowGroupIndices.size() - 1; state++) {
+                uint rowGroupSize = this->rowGroupIndices[state + 1] - this->rowGroupIndices[state];
                 if(this->relevantStates.get(state)) {
-                    shield.setChoice(precomputedChoices[state], state);
+                    auto maxProbabilityIndex = std::max_element(choice_it, choice_it + rowGroupSize) - choice_it;
+                    ValueType maxProbability = *(choice_it + maxProbabilityIndex);
+                    if(!relative && !choiceFilter(maxProbability, maxProbability, this->shieldingExpression->getValue())) {
+                        STORM_LOG_WARN("No shielding action possible with absolute comparison for state with index " << state);
+                        shield.setChoice(storm::storage::PostSchedulerChoice<ValueType>(), state, 0);
+                        choice_it += rowGroupSize;
+                        continue;
+                    }
+                    storm::storage::PostSchedulerChoice<ValueType> choiceMapping;
+                    for(uint choice = 0; choice < rowGroupSize; choice++, choice_it++) {
+                        if(choiceFilter(*choice_it, maxProbability, this->shieldingExpression->getValue())) {
+                            choiceMapping.addChoice(choice, choice);
+                        } else {
+                            choiceMapping.addChoice(choice, maxProbabilityIndex);
+                        }
+                    }
+                    shield.setChoice(choiceMapping, state, 0);
                 } else {
-                    shield.setChoice(storm::storage::Distribution<ValueType, IndexType>(), state);
+                    shield.setChoice(storm::storage::PostSchedulerChoice<ValueType>(), state, 0);
+                    choice_it += rowGroupSize;
                 }
             }
             return shield;
         }
-        // Explicitly instantiate appropriate
+
+        // Explicitly instantiate appropriate classes
         template class OptimalShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
 #ifdef STORM_HAVE_CARL
         template class OptimalShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>;

src/storm/shields/OptimalShield.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include "storm/shields/AbstractShield.h"
-#include "storm/storage/OptimalScheduler.h"
+#include "storm/storage/PostScheduler.h"
 
 namespace tempest {
     namespace shields {
@@ -9,11 +9,13 @@ namespace tempest {
         template<typename ValueType, typename IndexType>
         class OptimalShield : public AbstractShield<ValueType, IndexType> {
         public:
-            OptimalShield(std::vector<IndexType> const& rowGroupIndices, std::vector<uint64_t> const& precomputedChoices, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+            OptimalShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
 
-            storm::storage::OptimalScheduler<ValueType> construct();
+            storm::storage::PostScheduler<ValueType> construct();
+            template<typename Compare, bool relative>
+            storm::storage::PostScheduler<ValueType> constructWithCompareType();
         private:
-            std::vector<uint64_t> precomputedChoices;
+            std::vector<ValueType> choiceValues;
         };
     }
 }

src/storm/shields/PostSafetyShield.cpp → src/storm/shields/PostShield.cpp

@@ -1,4 +1,4 @@
-#include "storm/shields/PostSafetyShield.h"
+#include "storm/shields/PostShield.h"
 
 #include <algorithm>
 
@@ -6,12 +6,12 @@ namespace tempest {
     namespace shields {
 
         template<typename ValueType, typename IndexType>
-        PostSafetyShield<ValueType, IndexType>::PostSafetyShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates), choiceValues(choiceValues) {
+        PostShield<ValueType, IndexType>::PostShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates), choiceValues(choiceValues) {
             // Intentionally left empty.
         }
 
         template<typename ValueType, typename IndexType>
-        storm::storage::PostScheduler<ValueType> PostSafetyShield<ValueType, IndexType>::construct() {
+        storm::storage::PostScheduler<ValueType> PostShield<ValueType, IndexType>::construct() {
             if (this->getOptimizationDirection() == storm::OptimizationDirection::Minimize) {
                 if(this->shieldingExpression->isRelative()) {
                     return constructWithCompareType<storm::utility::ElementLessEqual<ValueType>, true>();
@@ -29,19 +29,22 @@ namespace tempest {
 
         template<typename ValueType, typename IndexType>
         template<typename Compare, bool relative>
-        storm::storage::PostScheduler<ValueType> PostSafetyShield<ValueType, IndexType>::constructWithCompareType() {
+        storm::storage::PostScheduler<ValueType> PostShield<ValueType, IndexType>::constructWithCompareType() {
             tempest::shields::utility::ChoiceFilter<ValueType, Compare, relative> choiceFilter;
             storm::storage::PostScheduler<ValueType> shield(this->rowGroupIndices.size() - 1, this->computeRowGroupSizes());
             auto choice_it = this->choiceValues.begin();
             if(this->coalitionStates.is_initialized()) {
-                this->relevantStates &= this->coalitionStates.get();
+                this->relevantStates &= ~this->coalitionStates.get();
             }
             for(uint state = 0; state < this->rowGroupIndices.size() - 1; state++) {
                 uint rowGroupSize = this->rowGroupIndices[state + 1] - this->rowGroupIndices[state];
                 if(this->relevantStates.get(state)) {
-                    auto maxProbabilityIndex = std::max_element(choice_it, choice_it + rowGroupSize) - choice_it;
-                    ValueType maxProbability = *(choice_it + maxProbabilityIndex);
-                    if(!relative && !choiceFilter(maxProbability, maxProbability, this->shieldingExpression->getValue())) {
+                    auto optProbabilityIndex = std::min_element(choice_it, choice_it + rowGroupSize) - choice_it;
+                    if(std::is_same<Compare, storm::utility::ElementGreaterEqual<ValueType>>::value) {
+                        optProbabilityIndex = std::max_element(choice_it, choice_it + rowGroupSize) - choice_it;
+                    }
+                    ValueType optProbability = *(choice_it + optProbabilityIndex);
+                    if(!relative && !choiceFilter(optProbability, optProbability, this->shieldingExpression->getValue())) {
                         STORM_LOG_WARN("No shielding action possible with absolute comparison for state with index " << state);
                         shield.setChoice(storm::storage::PostSchedulerChoice<ValueType>(), state, 0);
                         choice_it += rowGroupSize;
@@ -49,10 +52,10 @@ namespace tempest {
                     }
                     storm::storage::PostSchedulerChoice<ValueType> choiceMapping;
                     for(uint choice = 0; choice < rowGroupSize; choice++, choice_it++) {
-                        if(choiceFilter(*choice_it, maxProbability, this->shieldingExpression->getValue())) {
+                        if(choiceFilter(*choice_it, optProbability, this->shieldingExpression->getValue())) {
                             choiceMapping.addChoice(choice, choice);
                         } else {
-                            choiceMapping.addChoice(choice, maxProbabilityIndex);
+                            choiceMapping.addChoice(choice, optProbabilityIndex);
                         }
                     }
                     shield.setChoice(choiceMapping, state, 0);
@@ -65,9 +68,9 @@ namespace tempest {
         }
 
         // Explicitly instantiate appropriate classes
-        template class PostSafetyShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
+        template class PostShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
 #ifdef STORM_HAVE_CARL
-        template class PostSafetyShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>;
+        template class PostShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>;
 #endif
     }
 }

src/storm/shields/PostSafetyShield.h → src/storm/shields/PostShield.h

@@ -7,9 +7,9 @@ namespace tempest {
     namespace shields {
 
         template<typename ValueType, typename IndexType>
-        class PostSafetyShield : public AbstractShield<ValueType, IndexType> {
+        class PostShield : public AbstractShield<ValueType, IndexType> {
         public:
-            PostSafetyShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+            PostShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
 
             storm::storage::PostScheduler<ValueType> construct();
             template<typename Compare, bool relative>

src/storm/shields/PreSafetyShield.cpp → src/storm/shields/PreShield.cpp

@@ -1,4 +1,4 @@
-#include "storm/shields/PreSafetyShield.h"
+#include "storm/shields/PreShield.h"
 
 #include <algorithm>
 
@@ -6,12 +6,12 @@ namespace tempest {
     namespace shields {
 
         template<typename ValueType, typename IndexType>
-        PreSafetyShield<ValueType, IndexType>::PreSafetyShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates), choiceValues(choiceValues) {
+        PreShield<ValueType, IndexType>::PreShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) : AbstractShield<ValueType, IndexType>(rowGroupIndices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates), choiceValues(choiceValues) {
             // Intentionally left empty.
         }
 
         template<typename ValueType, typename IndexType>
-        storm::storage::PreScheduler<ValueType> PreSafetyShield<ValueType, IndexType>::construct() {
+        storm::storage::PreScheduler<ValueType> PreShield<ValueType, IndexType>::construct() {
             if (this->getOptimizationDirection() == storm::OptimizationDirection::Minimize) {
                 if(this->shieldingExpression->isRelative()) {
                     return constructWithCompareType<storm::utility::ElementLessEqual<ValueType>, true>();
@@ -29,26 +29,31 @@ namespace tempest {
 
         template<typename ValueType, typename IndexType>
         template<typename Compare, bool relative>
-        storm::storage::PreScheduler<ValueType> PreSafetyShield<ValueType, IndexType>::constructWithCompareType() {
+        storm::storage::PreScheduler<ValueType> PreShield<ValueType, IndexType>::constructWithCompareType() {
             tempest::shields::utility::ChoiceFilter<ValueType, Compare, relative> choiceFilter;
             storm::storage::PreScheduler<ValueType> shield(this->rowGroupIndices.size() - 1);
             auto choice_it = this->choiceValues.begin();
             if(this->coalitionStates.is_initialized()) {
-                this->relevantStates &= this->coalitionStates.get();
+                this->relevantStates &= ~this->coalitionStates.get();
             }
             for(uint state = 0; state < this->rowGroupIndices.size() - 1; state++) {
                 uint rowGroupSize = this->rowGroupIndices[state + 1] - this->rowGroupIndices[state];
                 if(this->relevantStates.get(state)) {
                     storm::storage::PreSchedulerChoice<ValueType> enabledChoices;
-                    ValueType maxProbability = *std::max_element(choice_it, choice_it + rowGroupSize);
-                    if(!relative && !choiceFilter(maxProbability, maxProbability, this->shieldingExpression->getValue())) {
+                    ValueType optProbability;
+                    if(std::is_same<Compare, storm::utility::ElementGreaterEqual<ValueType>>::value) {
+                        optProbability = *std::max_element(choice_it, choice_it + rowGroupSize);
+                    } else {
+                        optProbability = *std::min_element(choice_it, choice_it + rowGroupSize);
+                    }
+                    if(!relative && !choiceFilter(optProbability, optProbability, this->shieldingExpression->getValue())) {
                         STORM_LOG_WARN("No shielding action possible with absolute comparison for state with index " << state);
                         shield.setChoice(storm::storage::PreSchedulerChoice<ValueType>(), state, 0);
                         choice_it += rowGroupSize;
                         continue;
                     }
                     for(uint choice = 0; choice < rowGroupSize; choice++, choice_it++) {
-                        if(choiceFilter(*choice_it, maxProbability, this->shieldingExpression->getValue())) {
+                        if(choiceFilter(*choice_it, optProbability, this->shieldingExpression->getValue())) {
                             enabledChoices.addChoice(choice, *choice_it);
                         }
                     }
@@ -63,9 +68,9 @@ namespace tempest {
             return shield;
         }
         // Explicitly instantiate appropriate classes
-        template class PreSafetyShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
+        template class PreShield<double, typename storm::storage::SparseMatrix<double>::index_type>;
 #ifdef STORM_HAVE_CARL
-        template class PreSafetyShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>;
+        template class PreShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>;
 #endif
     }
 }

src/storm/shields/PreSafetyShield.h → src/storm/shields/PreShield.h

@@ -7,9 +7,9 @@ namespace tempest {
     namespace shields {
 
         template<typename ValueType, typename IndexType>
-        class PreSafetyShield : public AbstractShield<ValueType, IndexType> {
+        class PreShield : public AbstractShield<ValueType, IndexType> {
         public:
-            PreSafetyShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+            PreShield(std::vector<IndexType> const& rowGroupIndices, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
 
             storm::storage::PreScheduler<ValueType> construct();
             template<typename Compare, bool relative>

src/storm/shields/ShieldHandling.cpp

@@ -10,11 +10,12 @@ namespace tempest {
         void createShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) {
             std::ofstream stream;
             storm::utility::openFile(shieldFilename(shieldingExpression), stream);
+            if(coalitionStates.is_initialized()) coalitionStates.get().complement();
             if(shieldingExpression->isPreSafetyShield()) {
-                PreSafetyShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), choiceValues, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
+                PreShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), choiceValues, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
                 shield.construct().printToStream(stream, shieldingExpression, model);
             } else if(shieldingExpression->isPostSafetyShield()) {
-                PostSafetyShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), choiceValues, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
+                PostShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), choiceValues, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
                 shield.construct().printToStream(stream, shieldingExpression, model);
             } else {
                 STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Unknown Shielding Type: " + shieldingExpression->typeToString());
@@ -24,11 +25,15 @@ namespace tempest {
         }
 
         template<typename ValueType, typename IndexType>
-        void createQuantitativeShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<uint64_t> const& precomputedChoices, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) {
+        void createQuantitativeShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates) {
             std::ofstream stream;
             storm::utility::openFile(shieldFilename(shieldingExpression), stream);
-            if(shieldingExpression->isOptimalShield()) {
-                OptimalShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), precomputedChoices, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
+            if(coalitionStates.is_initialized()) coalitionStates.get().complement(); // TODO CHECK THIS!!!
+            if(shieldingExpression->isOptimalPreShield()) {
+                PreShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), choiceValues, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
+                shield.construct().printToStream(stream, shieldingExpression, model);
+            } else if(shieldingExpression->isOptimalPostShield()) {
+                PostShield<ValueType, IndexType> shield(model->getTransitionMatrix().getRowGroupIndices(), choiceValues, shieldingExpression, optimizationDirection, relevantStates, coalitionStates);
                 shield.construct().printToStream(stream, shieldingExpression, model);
             } else {
                 STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Unknown Shielding Type: " + shieldingExpression->typeToString());
@@ -38,10 +43,10 @@ namespace tempest {
         }
         // Explicitly instantiate appropriate
         template void createShield<double, typename storm::storage::SparseMatrix<double>::index_type>(std::shared_ptr<storm::models::sparse::Model<double>> model, std::vector<double> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
-        template void createQuantitativeShield<double, typename storm::storage::SparseMatrix<double>::index_type>(std::shared_ptr<storm::models::sparse::Model<double>> model, std::vector<uint64_t> const& precomputedChoices, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+        template void createQuantitativeShield<double, typename storm::storage::SparseMatrix<double>::index_type>(std::shared_ptr<storm::models::sparse::Model<double>> model, std::vector<double> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
 #ifdef STORM_HAVE_CARL
         template void createShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>(std::shared_ptr<storm::models::sparse::Model<storm::RationalNumber>> model, std::vector<storm::RationalNumber> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
-        template void createQuantitativeShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>(std::shared_ptr<storm::models::sparse::Model<storm::RationalNumber>> model, std::vector<uint64_t> const& precomputedChoices, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+        template void createQuantitativeShield<storm::RationalNumber, typename storm::storage::SparseMatrix<storm::RationalNumber>::index_type>(std::shared_ptr<storm::models::sparse::Model<storm::RationalNumber>> model, std::vector<storm::RationalNumber> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
 #endif
     }
 }

src/storm/shields/ShieldHandling.h

@@ -10,8 +10,8 @@
 #include "storm/logic/ShieldExpression.h"
 
 #include "storm/shields/AbstractShield.h"
-#include "storm/shields/PreSafetyShield.h"
-#include "storm/shields/PostSafetyShield.h"
+#include "storm/shields/PreShield.h"
+#include "storm/shields/PostShield.h"
 #include "storm/shields/OptimalShield.h"
 
 #include "storm/io/file.h"
@@ -27,6 +27,6 @@ namespace tempest {
         void createShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
 
         template<typename ValueType, typename IndexType = storm::storage::sparse::state_type>
-        void createQuantitativeShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<uint64_t> const& precomputedChoices, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
+        void createQuantitativeShield(std::shared_ptr<storm::models::sparse::Model<ValueType>> model, std::vector<ValueType> const& choiceValues, std::shared_ptr<storm::logic::ShieldExpression const> const& shieldingExpression, storm::OptimizationDirection optimizationDirection, storm::storage::BitVector relevantStates, boost::optional<storm::storage::BitVector> coalitionStates);
     }
 }

src/test/storm/parser/GameShieldingParserTest.cpp

@@ -20,15 +20,15 @@ TEST(GameShieldingParserTest, PreSafetyShieldTest) {
 
     std::shared_ptr<storm::logic::ShieldExpression const> shieldExpression(nullptr);
     ASSERT_NO_THROW(shieldExpression = property.at(0).getShieldingExpression());
-    EXPECT_TRUE(shieldExpression->isPreSafetyShield());
-    EXPECT_FALSE(shieldExpression->isPostSafetyShield());
+    EXPECT_TRUE(shieldExpression->isPreShield());
+    EXPECT_FALSE(shieldExpression->isPostShield());
     EXPECT_FALSE(shieldExpression->isOptimalShield());
     EXPECT_TRUE(shieldExpression->isRelative());
     EXPECT_EQ(std::stod(value), shieldExpression->getValue());
     EXPECT_EQ(filename, shieldExpression->getFilename());
 }
 
-TEST(GameShieldingParserTest, PostSafetyShieldTest) {
+TEST(GameShieldingParserTest, PostShieldTest) {
     storm::parser::FormulaParser formulaParser;
 
     std::string filename = "postSafetyShieldFileName";
@@ -46,7 +46,7 @@ TEST(GameShieldingParserTest, PostSafetyShieldTest) {
     std::shared_ptr<storm::logic::ShieldExpression const> shieldExpression(nullptr);
     ASSERT_NO_THROW(shieldExpression = property.at(0).getShieldingExpression());
     EXPECT_FALSE(shieldExpression->isPreSafetyShield());
-    EXPECT_TRUE(shieldExpression->isPostSafetyShield());
+    EXPECT_TRUE(shieldExpression->isPostShield());
     EXPECT_FALSE(shieldExpression->isOptimalShield());
     EXPECT_FALSE(shieldExpression->isRelative());
     EXPECT_EQ(std::stod(value), shieldExpression->getValue());
@@ -74,7 +74,7 @@ TEST(GameShieldingParserTest, OptimalShieldTest) {
     std::shared_ptr<storm::logic::ShieldExpression const> shieldExpression(nullptr);
     ASSERT_NO_THROW(shieldExpression = property.at(0).getShieldingExpression());
     EXPECT_FALSE(shieldExpression->isPreSafetyShield());
-    EXPECT_FALSE(shieldExpression->isPostSafetyShield());
+    EXPECT_FALSE(shieldExpression->isPostShield());
     EXPECT_TRUE(shieldExpression->isOptimalShield());
     EXPECT_FALSE(shieldExpression->isRelative());
     EXPECT_EQ(filename, shieldExpression->getFilename());

src/test/storm/parser/MdpShieldingParserTest.cpp

@@ -18,19 +18,19 @@ TEST(MdpShieldingParserTest, PreSafetyShieldTest) {
     std::shared_ptr<storm::logic::ShieldExpression const> shieldExpression(nullptr);
     ASSERT_NO_THROW(shieldExpression = property.at(0).getShieldingExpression());
     EXPECT_TRUE(shieldExpression->isPreSafetyShield());
-    EXPECT_FALSE(shieldExpression->isPostSafetyShield());
+    EXPECT_FALSE(shieldExpression->isPostShield());
     EXPECT_FALSE(shieldExpression->isOptimalShield());
     EXPECT_FALSE(shieldExpression->isRelative());
     EXPECT_EQ(std::stod(value), shieldExpression->getValue());
     EXPECT_EQ(filename, shieldExpression->getFilename());
 }
 
-TEST(MdpShieldingParserTest, PostSafetyShieldTest) {
+TEST(MdpShieldingParserTest, PostShieldTest) {
     storm::parser::FormulaParser formulaParser;
 
     std::string filename = "postSafetyShieldFileName";
     std::string value = "0.95";
-    std::string input = "<" + filename + ", PostSafety, lambda=" + value + "> Pmin=? [X !\"label\"]";
+    std::string input = "<" + filename + ", Post, lambda=" + value + "> Pmin=? [X !\"label\"]";
 
     std::shared_ptr<storm::logic::Formula const> formula(nullptr);
     std::vector<storm::jani::Property> property;
@@ -40,7 +40,7 @@ TEST(MdpShieldingParserTest, PostSafetyShieldTest) {
     std::shared_ptr<storm::logic::ShieldExpression const> shieldExpression(nullptr);
     ASSERT_NO_THROW(shieldExpression = property.at(0).getShieldingExpression());
     EXPECT_FALSE(shieldExpression->isPreSafetyShield());
-    EXPECT_TRUE(shieldExpression->isPostSafetyShield());
+    EXPECT_TRUE(shieldExpression->isPostShield());
     EXPECT_FALSE(shieldExpression->isOptimalShield());
     EXPECT_TRUE(shieldExpression->isRelative());
     EXPECT_EQ(std::stod(value), shieldExpression->getValue());
@@ -65,7 +65,7 @@ TEST(MdpShieldingParserTest, OptimalShieldTest) {
     std::shared_ptr<storm::logic::ShieldExpression const> shieldExpression(nullptr);
     ASSERT_NO_THROW(shieldExpression = property.at(0).getShieldingExpression());
     EXPECT_FALSE(shieldExpression->isPreSafetyShield());
-    EXPECT_FALSE(shieldExpression->isPostSafetyShield());
+    EXPECT_FALSE(shieldExpression->isPostShield());
     EXPECT_TRUE(shieldExpression->isOptimalShield());
     EXPECT_FALSE(shieldExpression->isRelative());
     EXPECT_EQ(filename, shieldExpression->getFilename());