diff --git a/src/storm/modelchecker/rpatl/SparseSmgRpatlModelChecker.cpp b/src/storm/modelchecker/rpatl/SparseSmgRpatlModelChecker.cpp
index 9239f0578..7fa177d2c 100644
--- a/src/storm/modelchecker/rpatl/SparseSmgRpatlModelChecker.cpp
+++ b/src/storm/modelchecker/rpatl/SparseSmgRpatlModelChecker.cpp
@@ -143,7 +143,28 @@ namespace storm {
             ExplicitQualitativeCheckResult const& leftResult = leftResultPointer->asExplicitQualitativeCheckResult();
             ExplicitQualitativeCheckResult const& rightResult = rightResultPointer->asExplicitQualitativeCheckResult();
 
-            auto ret = storm::modelchecker::helper::SparseSmgRpatlHelper<ValueType>::computeUntilProbabilitiesSound(env, storm::solver::SolveGoal<ValueType>(this->getModel(), checkTask), this->getModel().getTransitionMatrix(), this->getModel().getBackwardTransitions(), leftResult.getTruthValuesVector(), rightResult.getTruthValuesVector(), checkTask.isQualitativeSet(), statesOfCoalition, checkTask.isProduceSchedulersSet(), checkTask.getHint());
+            if (env.solver().isForceSoundness()) {
+                auto ret = storm::modelchecker::helper::SparseSmgRpatlHelper<ValueType>::computeUntilProbabilitiesSound(
+                    env, storm::solver::SolveGoal<ValueType>(this->getModel(), checkTask), this->getModel().getTransitionMatrix(),
+                    this->getModel().getBackwardTransitions(), leftResult.getTruthValuesVector(), rightResult.getTruthValuesVector(),
+                    checkTask.isQualitativeSet(), statesOfCoalition, checkTask.isProduceSchedulersSet(), checkTask.getHint());
+
+                std::unique_ptr<CheckResult> result(new ExplicitQuantitativeCheckResult<ValueType>(std::move(ret.values)));
+                if(checkTask.isShieldingTask()) {
+                    storm::storage::BitVector allStatesBv = storm::storage::BitVector(this->getModel().getTransitionMatrix().getRowGroupCount(), true);
+                    auto shield = tempest::shields::createShield<ValueType>(std::make_shared<storm::models::sparse::Smg<ValueType>>(this->getModel()), std::move(ret.choiceValues), checkTask.getShieldingExpression(), checkTask.getOptimizationDirection(), allStatesBv, ~statesOfCoalition);
+                    result->asExplicitQuantitativeCheckResult<ValueType>().setShield(std::move(shield));
+                }
+                if (checkTask.isProduceSchedulersSet() && ret.scheduler) {
+                    result->asExplicitQuantitativeCheckResult<ValueType>().setScheduler(std::move(ret.scheduler));
+                }
+                return result;
+            }
+
+            auto ret = storm::modelchecker::helper::SparseSmgRpatlHelper<ValueType>::computeUntilProbabilities(
+                    env, storm::solver::SolveGoal<ValueType>(this->getModel(), checkTask), this->getModel().getTransitionMatrix(),
+                    this->getModel().getBackwardTransitions(), leftResult.getTruthValuesVector(), rightResult.getTruthValuesVector(),
+                    checkTask.isQualitativeSet(), statesOfCoalition, checkTask.isProduceSchedulersSet(), checkTask.getHint());
             STORM_LOG_DEBUG(ret.values);
             std::unique_ptr<CheckResult> result(new ExplicitQuantitativeCheckResult<ValueType>(std::move(ret.values)));
             if(checkTask.isShieldingTask()) {
@@ -241,12 +262,28 @@ namespace storm {
         template<typename SparseSmgModelType>
         std::unique_ptr<CheckResult> SparseSmgRpatlModelChecker<SparseSmgModelType>::computeLongRunAverageRewards(Environment const& env, storm::logic::RewardMeasureType rewardMeasureType, CheckTask<storm::logic::LongRunAverageRewardFormula, ValueType> const& checkTask) {
             auto rewardModel = storm::utility::createFilteredRewardModel(this->getModel(), checkTask);
-            storm::modelchecker::helper::internal::SparseSmgLraHelper<ValueType> helper(this->getModel().getTransitionMatrix(), statesOfCoalition);
-            storm::modelchecker::helper::setInformationFromCheckTaskNondeterministic(helper, checkTask, this->getModel());
-            auto values = helper.computeLongRunAverageRewardsSound(env, rewardModel.get());
 
+            if (env.solver().isForceSoundness()) {
+                storm::modelchecker::helper::internal::SparseSmgLraHelper<ValueType> helper(this->getModel().getTransitionMatrix(), statesOfCoalition);
+                auto values = helper.computeLongRunAverageRewardsSound(env, rewardModel.get());
+                storm::modelchecker::helper::setInformationFromCheckTaskNondeterministic(helper, checkTask, this->getModel());
+                std::unique_ptr<CheckResult> result(new ExplicitQuantitativeCheckResult<ValueType>(std::move(values)));
+
+                if(checkTask.isShieldingTask()) {
+                    storm::storage::BitVector allStatesBv = storm::storage::BitVector(this->getModel().getTransitionMatrix().getRowGroupCount(), true);
+                    auto shield = tempest::shields::createQuantitativeShield<ValueType>(std::make_shared<storm::models::sparse::Smg<ValueType>>(this->getModel()), helper.getChoiceValues(), checkTask.getShieldingExpression(), checkTask.getOptimizationDirection(), allStatesBv, statesOfCoalition);
+                    result->asExplicitQuantitativeCheckResult<ValueType>().setShield(std::move(shield));
+                }
+                if (checkTask.isProduceSchedulersSet()) {
+                    result->asExplicitQuantitativeCheckResult<ValueType>().setScheduler(std::make_unique<storm::storage::Scheduler<ValueType>>(helper.extractScheduler()));
+                }
+                return result;
+            }
+
+            storm::modelchecker::helper::SparseNondeterministicGameInfiniteHorizonHelper<ValueType> helper(this->getModel().getTransitionMatrix(), statesOfCoalition);
+            auto values = helper.computeLongRunAverageRewards(env, rewardModel.get());
+            storm::modelchecker::helper::setInformationFromCheckTaskNondeterministic(helper, checkTask, this->getModel());
             std::unique_ptr<CheckResult> result(new ExplicitQuantitativeCheckResult<ValueType>(std::move(values)));
-            /*
             if(checkTask.isShieldingTask()) {
                 storm::storage::BitVector allStatesBv = storm::storage::BitVector(this->getModel().getTransitionMatrix().getRowGroupCount(), true);
                 auto shield = tempest::shields::createQuantitativeShield<ValueType>(std::make_shared<storm::models::sparse::Smg<ValueType>>(this->getModel()), helper.getChoiceValues(), checkTask.getShieldingExpression(), checkTask.getOptimizationDirection(), allStatesBv, statesOfCoalition);
@@ -255,7 +292,6 @@ namespace storm {
             if (checkTask.isProduceSchedulersSet()) {
                 result->asExplicitQuantitativeCheckResult<ValueType>().setScheduler(std::make_unique<storm::storage::Scheduler<ValueType>>(helper.extractScheduler()));
             }
-             */
             return result;
         }
 
diff --git a/src/storm/modelchecker/rpatl/helper/SparseSmgRpatlHelper.cpp b/src/storm/modelchecker/rpatl/helper/SparseSmgRpatlHelper.cpp
index ddf04ea90..e2a349a50 100644
--- a/src/storm/modelchecker/rpatl/helper/SparseSmgRpatlHelper.cpp
+++ b/src/storm/modelchecker/rpatl/helper/SparseSmgRpatlHelper.cpp
@@ -61,13 +61,10 @@ namespace storm {
 
             template<typename ValueType>
             SMGSparseModelCheckingHelperReturnType<ValueType> SparseSmgRpatlHelper<ValueType>::computeUntilProbabilitiesSound(Environment const& env, storm::solver::SolveGoal<ValueType>&& goal, storm::storage::SparseMatrix<ValueType> const& transitionMatrix, storm::storage::SparseMatrix<ValueType> const& backwardTransitions, storm::storage::BitVector const& phiStates, storm::storage::BitVector const& psiStates, bool qualitative, storm::storage::BitVector statesOfCoalition, bool produceScheduler, ModelCheckerHint const& hint) {
-
                 storm::storage::BitVector probGreater0 = storm::utility::graph::performProbGreater0(backwardTransitions, phiStates, psiStates);
                 std::unique_ptr<storm::storage::Scheduler<ValueType>> scheduler;
                 storm::storage::BitVector relevantStates = phiStates;
 
-                storm::storage::SparseMatrix<ValueType> submatrix = transitionMatrix.getSubmatrix(true, relevantStates, relevantStates, false);
-
                 // Initialize the x vector and solution vector result.
                 std::vector<ValueType> xL = std::vector<ValueType>(transitionMatrix.getRowGroupCount(), storm::utility::zero<ValueType>());
                 // assigning 1s to the xL vector for all Goal states
@@ -112,19 +109,24 @@ namespace storm {
                 clippedStatesOfCoalition.setClippedStatesOfCoalition(relevantStates, statesOfCoalition);
                 std::vector<ValueType> constrainedChoiceValues = std::vector<ValueType>(b.size(), storm::utility::zero<ValueType>());
 
-                storm::modelchecker::helper::internal::SoundGameViHelper<ValueType> viHelper(submatrix, submatrix.transpose(), b, clippedStatesOfCoalition, clippedPsiStates, goal.direction());
+                if (!relevantStates.empty()) {
+                    storm::storage::SparseMatrix<ValueType> submatrix = transitionMatrix.getSubmatrix(true, relevantStates, relevantStates, false);
+                    storm::modelchecker::helper::internal::SoundGameViHelper<ValueType> viHelper(submatrix, submatrix.transpose(), b, clippedStatesOfCoalition,
+                                                                                                 clippedPsiStates, goal.direction());
 
-                if (produceScheduler) {
-                    viHelper.setProduceScheduler(true);
-                }
+                    if (produceScheduler) {
+                        viHelper.setProduceScheduler(true);
+                    }
 
-                viHelper.performValueIteration(env, xL, xU, goal.direction(), constrainedChoiceValues);
+                    viHelper.performValueIteration(env, xL, xU, goal.direction(), constrainedChoiceValues);
 
-                viHelper.fillChoiceValuesVector(constrainedChoiceValues, relevantStates, transitionMatrix.getRowGroupIndices());
-                storm::utility::vector::setVectorValues(result, relevantStates, xL);
+                    viHelper.fillChoiceValuesVector(constrainedChoiceValues, relevantStates, transitionMatrix.getRowGroupIndices());
+                    storm::utility::vector::setVectorValues(result, relevantStates, xL);
 
-                if (produceScheduler) {
-                    scheduler = std::make_unique<storm::storage::Scheduler<ValueType>>(expandScheduler(viHelper.extractScheduler(), psiStates, ~phiStates));
+                    if (produceScheduler) {
+                        scheduler =
+                            std::make_unique<storm::storage::Scheduler<ValueType>>(expandScheduler(viHelper.extractScheduler(), psiStates, ~phiStates, true));
+                    }
                 }
 
                 return SMGSparseModelCheckingHelperReturnType<ValueType>(std::move(result), std::move(relevantStates), std::move(scheduler), std::move(constrainedChoiceValues));
@@ -160,7 +162,22 @@ namespace storm {
                 storm::storage::BitVector notPsiStates = ~psiStates;
                 statesOfCoalition.complement();
 
-                auto result = computeUntilProbabilitiesSound(env, std::move(goal), transitionMatrix, backwardTransitions, storm::storage::BitVector(transitionMatrix.getRowGroupCount(), true), notPsiStates, qualitative, statesOfCoalition, produceScheduler, hint);
+                if (env.solver().isForceSoundness()) {
+                    auto result = computeUntilProbabilitiesSound(env, std::move(goal), transitionMatrix, backwardTransitions,
+                                                                 storm::storage::BitVector(transitionMatrix.getRowGroupCount(), true), notPsiStates,
+                                                                 qualitative, statesOfCoalition, produceScheduler, hint);
+                    for (auto& element : result.values) {
+                        element = storm::utility::one<ValueType>() - element;
+                    }
+                    for (auto& element : result.choiceValues) {
+                        element = storm::utility::one<ValueType>() - element;
+                    }
+                    return result;
+                }
+
+                auto result = computeUntilProbabilities(env, std::move(goal), transitionMatrix, backwardTransitions,
+                                                             storm::storage::BitVector(transitionMatrix.getRowGroupCount(), true), notPsiStates,
+                                                             qualitative, statesOfCoalition, produceScheduler, hint);
                 for (auto& element : result.values) {
                     element = storm::utility::one<ValueType>() - element;
                 }
diff --git a/src/storm/modelchecker/rpatl/helper/internal/SoundGameViHelper.cpp b/src/storm/modelchecker/rpatl/helper/internal/SoundGameViHelper.cpp
index e42179764..a91fc03b6 100644
--- a/src/storm/modelchecker/rpatl/helper/internal/SoundGameViHelper.cpp
+++ b/src/storm/modelchecker/rpatl/helper/internal/SoundGameViHelper.cpp
@@ -42,7 +42,7 @@ namespace storm {
                     _x1U = xU;
                     _x2U = _x1U;
 
-                    if (this->isProduceSchedulerSet()) { // TODO Fabian scheduler !!!
+                    if (this->isProduceSchedulerSet()) {
                         if (!this->_producedOptimalChoices.is_initialized()) {
                             this->_producedOptimalChoices.emplace();
                         }