diff --git a/src/storm-pars-cli/storm-pars.cpp b/src/storm-pars-cli/storm-pars.cpp
index 5aa2d6af9..c66ec582a 100644
--- a/src/storm-pars-cli/storm-pars.cpp
+++ b/src/storm-pars-cli/storm-pars.cpp
@@ -567,7 +567,6 @@ namespace storm {
 
                 auto parametricSettings = storm::settings::getModule<storm::settings::modules::ParametricSettings>();
                 auto regionSettings = storm::settings::getModule<storm::settings::modules::RegionSettings>();
-                auto engine = regionSettings.getRegionCheckEngine();
 
                 std::function<std::unique_ptr<storm::modelchecker::CheckResult>(std::shared_ptr<storm::logic::Formula const> const& formula)> verificationCallback;
                 std::function<void(std::unique_ptr<storm::modelchecker::CheckResult> const&)> postprocessingCallback;
diff --git a/src/storm-pars/analysis/AssumptionChecker.cpp b/src/storm-pars/analysis/AssumptionChecker.cpp
index e83c323df..0d8d87cf9 100644
--- a/src/storm-pars/analysis/AssumptionChecker.cpp
+++ b/src/storm-pars/analysis/AssumptionChecker.cpp
@@ -74,8 +74,8 @@ namespace storm {
         template <typename ValueType, typename ConstantType>
         AssumptionStatus AssumptionChecker<ValueType, ConstantType>::validateAssumption(uint_fast64_t val1, uint_fast64_t val2,std::shared_ptr<expressions::BinaryRelationExpression> assumption, std::shared_ptr<Order> order, storage::ParameterRegion<ValueType> region, std::vector<ConstantType>const minValues, std::vector<ConstantType>const maxValues) const {
             // First check if based on sample points the assumption can be discharged
-            assert (val1 == std::stoi(assumption->getFirstOperand()->asVariableExpression().getVariableName()));
-            assert (val2 == std::stoi(assumption->getSecondOperand()->asVariableExpression().getVariableName()));
+            assert (val1 == std::stoull(assumption->getFirstOperand()->asVariableExpression().getVariableName()));
+            assert (val2 == std::stoull(assumption->getSecondOperand()->asVariableExpression().getVariableName()));
             AssumptionStatus result = AssumptionStatus::UNKNOWN;
             if (useSamples) {
                 result = checkOnSamples(assumption);
diff --git a/src/storm-pars/analysis/LocalMonotonicityResult.cpp b/src/storm-pars/analysis/LocalMonotonicityResult.cpp
index 8a5bb7f18..20a9a7ca3 100644
--- a/src/storm-pars/analysis/LocalMonotonicityResult.cpp
+++ b/src/storm-pars/analysis/LocalMonotonicityResult.cpp
@@ -57,7 +57,7 @@ namespace storm {
         template <typename VariableType>
         std::shared_ptr<LocalMonotonicityResult<VariableType>> LocalMonotonicityResult<VariableType>::copy() {
             std::shared_ptr<LocalMonotonicityResult<VariableType>> copy = std::make_shared<LocalMonotonicityResult<VariableType>>(stateMonRes.size());
-            for (auto state = 0; state < stateMonRes.size(); state++) {
+            for (size_t state = 0; state < stateMonRes.size(); state++) {
                 if (stateMonRes[state] != nullptr) {
                     copy->setMonotonicityResult(state, stateMonRes[state]->copy());
                 }
@@ -138,7 +138,7 @@ namespace storm {
         template <typename VariableType>
         std::string LocalMonotonicityResult<VariableType>::toString() const {
             std::string result = "Local Monotonicity Result: \n";
-            for (auto i = 0; i < stateMonRes.size(); ++i) {
+            for (size_t i = 0; i < stateMonRes.size(); ++i) {
                 result += "state ";
                 result += std::to_string(i);
                 if (stateMonRes[i] != nullptr) {
diff --git a/src/storm-pars/analysis/MonotonicityHelper.cpp b/src/storm-pars/analysis/MonotonicityHelper.cpp
index 07cf5eb04..34406067d 100644
--- a/src/storm-pars/analysis/MonotonicityHelper.cpp
+++ b/src/storm-pars/analysis/MonotonicityHelper.cpp
@@ -60,7 +60,7 @@ namespace storm {
 
             this->extender = new analysis::OrderExtender<ValueType, ConstantType>(model, formulas[0]);
 
-            for (auto i = 0; i < matrix.getRowCount(); ++i) {
+            for (size_t i = 0; i < matrix.getRowCount(); ++i) {
                 std::set<VariableType> occurringVariables;
 
                 for (auto &entry : matrix.getRow(i)) {
diff --git a/src/storm-pars/modelchecker/region/RegionModelChecker.cpp b/src/storm-pars/modelchecker/region/RegionModelChecker.cpp
index e97005830..324e332c4 100644
--- a/src/storm-pars/modelchecker/region/RegionModelChecker.cpp
+++ b/src/storm-pars/modelchecker/region/RegionModelChecker.cpp
@@ -115,8 +115,6 @@ namespace storm {
                                                                      RegionResult::Unknown);
 
                                 currentRegion.split(currentRegion.getCenterPoint(), newRegions);
-
-                                bool first = true;
                                 for (auto& newRegion : newRegions) {
                                     unprocessedRegions.emplace(std::move(newRegion), initResForNewRegions);
                                     refinementDepths.push(currentDepth + 1);
diff --git a/src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp b/src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp
index 44fa2f689..9fec51ff5 100644
--- a/src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp
+++ b/src/storm-pars/modelchecker/region/SparseDtmcParameterLiftingModelChecker.cpp
@@ -317,7 +317,7 @@ namespace storm {
 
                     // TODO: this only works since we decided to keep all columns
                     auto const & occuringVariables = parameterLifter->getOccurringVariablesAtState();
-                    for (auto state = 0; state < parameterLifter->getRowGroupCount(); ++state) {
+                    for (uint_fast64_t state = 0; state < parameterLifter->getRowGroupCount(); ++state) {
                         auto oldStateNumber = parameterLifter->getOriginalStateNumber(state);
                         auto& variables = occuringVariables.at(oldStateNumber);
                         // point at which we start with rows for this state
@@ -410,10 +410,6 @@ namespace storm {
             auto const& matrix = parameterLifter->getMatrix();
             auto const& vector = parameterLifter->getVector();
 
-            auto i = 0;
-            for (auto & x : vector) {
-                ++i;
-            }
             std::vector<ConstantType> stateResults;
             for (uint64_t state = 0; state < schedulerChoices.size(); ++state) {
                 uint64_t rowOffset = matrix.getRowGroupIndices()[state];
@@ -591,7 +587,6 @@ namespace storm {
                 bool done = true;
                 for (auto const& state : states) {
                     done &= order->contains(state) && localMonotonicityResult->getMonotonicity(state, var) != Monotonicity::Unknown;
-                    auto check = localMonotonicityResult->getMonotonicity(state, var);
                     if (!done) {
                         break;
                     }
diff --git a/src/storm-pars/modelchecker/region/SparseParameterLiftingModelChecker.cpp b/src/storm-pars/modelchecker/region/SparseParameterLiftingModelChecker.cpp
index 14856299b..d43cd23ea 100644
--- a/src/storm-pars/modelchecker/region/SparseParameterLiftingModelChecker.cpp
+++ b/src/storm-pars/modelchecker/region/SparseParameterLiftingModelChecker.cpp
@@ -508,7 +508,6 @@ namespace storm {
                                                                                                              std::set<VariableType>& possibleNotMonotoneParameters,
                                                                                                              std::set<VariableType>const& consideredVariables,
                                                                                                              storm::solver::OptimizationDirection const& dir) {
-            bool minimize = storm::solver::minimize(dir);
             typedef typename storm::storage::ParameterRegion<typename SparseModelType::ValueType>::Valuation Valuation;
             typedef typename storm::storage::ParameterRegion<typename SparseModelType::ValueType>::CoefficientType CoefficientType;
             ConstantType value = storm::solver::minimize(dir) ? 1 : 0;
diff --git a/src/storm-pars/storage/ParameterRegion.cpp b/src/storm-pars/storage/ParameterRegion.cpp
index ba64bf30e..a6c1f16ee 100644
--- a/src/storm-pars/storage/ParameterRegion.cpp
+++ b/src/storm-pars/storage/ParameterRegion.cpp
@@ -283,12 +283,12 @@ namespace storm {
         }
 
         template <typename ParametricType>
-        void ParameterRegion<ParametricType>::setSplitThreshold(int splitThreshold) {
+        void ParameterRegion<ParametricType>::setSplitThreshold(size_t splitThreshold) {
             this->splitThreshold = splitThreshold;
         }
 
         template <typename ParametricType>
-        int ParameterRegion<ParametricType>::getSplitThreshold() const {
+        size_t ParameterRegion<ParametricType>::getSplitThreshold() const {
             return splitThreshold;
         }
 
diff --git a/src/storm-pars/storage/ParameterRegion.h b/src/storm-pars/storage/ParameterRegion.h
index 7545bb2ab..ded2515b0 100644
--- a/src/storm-pars/storage/ParameterRegion.h
+++ b/src/storm-pars/storage/ParameterRegion.h
@@ -57,8 +57,8 @@ namespace storm {
              */
             Valuation getCenterPoint() const;
 
-            void setSplitThreshold(int splitThreshold);
-            int getSplitThreshold() const;
+            void setSplitThreshold(size_t splitThreshold);
+            size_t getSplitThreshold() const;
 
             /*!
              * Returns the area of this region
@@ -89,7 +89,7 @@ namespace storm {
             void init();
 
             bool lastSplitMonotone = false;
-            int splitThreshold;
+            size_t splitThreshold;
             
             Valuation lowerBoundaries;
             Valuation upperBoundaries;