diff --git a/src/storm-pars-cli/storm-pars.cpp b/src/storm-pars-cli/storm-pars.cpp
index cd6a20712..03665fe25 100644
--- a/src/storm-pars-cli/storm-pars.cpp
+++ b/src/storm-pars-cli/storm-pars.cpp
@@ -652,7 +652,7 @@ namespace storm {
             }
 
 
-            if (monSettings.isSccEliminationSet()) {
+            if (model && monSettings.isSccEliminationSet()) {
                 storm::utility::Stopwatch eliminationWatch(true);
                 // TODO: check for correct Model type
                 STORM_PRINT("Applying scc elimination" << std::endl);
@@ -720,12 +720,15 @@ namespace storm {
                 std::vector<std::shared_ptr<storm::logic::Formula const>> formulas = storm::api::extractFormulasFromProperties(input.properties);
                 // Monotonicity
                 storm::utility::Stopwatch monotonicityWatch(true);
-                auto monotonicityChecker = storm::analysis::MonotonicityChecker<ValueType>(model, formulas, monSettings.isValidateAssumptionsSet(), monSettings.getNumberOfSamples(), monSettings.getMonotonicityAnalysisPrecision());
+                std::vector<storm::storage::ParameterRegion<ValueType>> regions = parseRegions<ValueType>(model);
+
+                STORM_LOG_THROW(regions.size() > 1, storm::exceptions::InvalidArgumentException, "Monotonicity analysis only allowed on single region");
+                storm::analysis::MonotonicityChecker<ValueType> monotonicityChecker = storm::analysis::MonotonicityChecker<ValueType>(model, formulas, regions, monSettings.isValidateAssumptionsSet(), monSettings.getNumberOfSamples(), monSettings.getMonotonicityAnalysisPrecision());
                 monotonicityChecker.checkMonotonicity();
                 monotonicityWatch.stop();
                 STORM_PRINT(std::endl << "Total time for monotonicity checking: " << monotonicityWatch << "." << std::endl
                                     << std::endl);
-return;
+                return;
             }
 
             std::vector<storm::storage::ParameterRegion<ValueType>> regions = parseRegions<ValueType>(model);
diff --git a/src/storm-pars/analysis/AssumptionChecker.cpp b/src/storm-pars/analysis/AssumptionChecker.cpp
index 3aca39f31..5fe86eff5 100644
--- a/src/storm-pars/analysis/AssumptionChecker.cpp
+++ b/src/storm-pars/analysis/AssumptionChecker.cpp
@@ -20,9 +20,10 @@
 namespace storm {
     namespace analysis {
         template <typename ValueType>
-        AssumptionChecker<ValueType>::AssumptionChecker(std::shared_ptr<logic::Formula const> formula, std::shared_ptr<models::sparse::Dtmc<ValueType>> model, uint_fast64_t numberOfSamples) {
+        AssumptionChecker<ValueType>::AssumptionChecker(std::shared_ptr<logic::Formula const> formula, std::shared_ptr<models::sparse::Dtmc<ValueType>> model, storm::storage::ParameterRegion<ValueType> region, uint_fast64_t numberOfSamples) {
             this->formula = formula;
             this->matrix = model->getTransitionMatrix();
+            this->region = region;
 
             // Create sample points
             auto instantiator = utility::ModelInstantiator<models::sparse::Dtmc<ValueType>, models::sparse::Dtmc<double>>(*model);
@@ -31,9 +32,15 @@ namespace storm {
 
             for (auto i = 0; i < numberOfSamples; ++i) {
                 auto valuation = utility::parametric::Valuation<ValueType>();
-                for (auto itr = variables.begin(); itr != variables.end(); ++itr) {
-                    // Creates samples between 0 and 1, 1/(#samples+2), 2/(#samples+2), ..., (#samples+1)/(#samples+2)
-                    auto val = std::pair<typename utility::parametric::VariableType<ValueType>::type, typename utility::parametric::CoefficientType<ValueType>::type>((*itr), utility::convertNumber<typename utility::parametric::CoefficientType<ValueType>::type>(boost::lexical_cast<std::string>((i+1)/(double (numberOfSamples + 2)))));
+                // TODO: samplen over de region
+                for (auto var: variables) {
+
+                    auto lb = region.getLowerBoundary(var.name());
+                    auto ub = region.getUpperBoundary(var.name());
+                    // Creates samples between lb and ub, that is: lb, lb + (ub-lb)/(#samples -1), lb + 2* (ub-lb)/(#samples -1), ..., ub
+                    auto val =
+                            std::pair<typename utility::parametric::VariableType<ValueType>::type, typename utility::parametric::CoefficientType<ValueType>::type>
+                                    (var,utility::convertNumber<typename utility::parametric::CoefficientType<ValueType>::type>(lb + i*(ub-lb)/(numberOfSamples-1)));
                     valuation.insert(val);
                 }
                 models::sparse::Dtmc<double> sampleModel = instantiator.instantiate(valuation);
@@ -61,6 +68,7 @@ namespace storm {
 
         template <typename ValueType>
         AssumptionChecker<ValueType>::AssumptionChecker(std::shared_ptr<logic::Formula const> formula, std::shared_ptr<models::sparse::Mdp<ValueType>> model, uint_fast64_t numberOfSamples) {
+            STORM_LOG_THROW(false, exceptions::NotImplementedException, "Assumption checking for mdps not yet implemented");
             this->formula = formula;
             this->matrix = model->getTransitionMatrix();
 
@@ -166,8 +174,10 @@ namespace storm {
                             && lattice->compare(state1succ1->getColumn(), state1succ2->getColumn()) != Lattice::NodeComparison::UNKNOWN) {
                             // The assumption should be the greater assumption
                             // If the result is unknown, we cannot compare, also SMTSolver will not help
-                            result = validateAssumptionFunction(lattice, state1succ1, state1succ2, state2succ1,
-                                                                state2succ2);
+                            result = validateAssumptionSMTSolver(assumption, lattice);
+
+//                            result = validateAssumptionFunction(lattice, state1succ1, state1succ2, state2succ1,
+//                                                                state2succ2);
                         } else if (assumption->getRelationType() == expressions::BinaryRelationExpression::RelationType::Equal) {
                             // The assumption is equal, the successors are the same,
                             // so if the probability of reaching the successors is the same, we have a valid assumption
@@ -216,7 +226,7 @@ namespace storm {
             // This will give the smallest result
             std::map<typename utility::parametric::VariableType<ValueType>::type, typename utility::parametric::CoefficientType<ValueType>::type> substitutions;
             for (auto var : vars) {
-                auto monotonicity = MonotonicityChecker<ValueType>::checkDerivative(prob.derivative(var));
+                auto monotonicity = MonotonicityChecker<ValueType>::checkDerivative(prob.derivative(var), region);
                 if (monotonicity.first) {
                     // monotone increasing
                     substitutions[var] = 0;
@@ -301,7 +311,7 @@ namespace storm {
                 } else {
                     assert (assumption->getRelationType() ==
                         expressions::BinaryRelationExpression::RelationType::Equal);
-                    exprToCheck = expr1 > expr2;
+                    exprToCheck = expr1 != expr2 ;
                 }
 
                 auto variables = manager->getVariables();
@@ -313,7 +323,9 @@ namespace storm {
                         exprBounds = exprBounds && manager->rational(0) <= var && var <= manager->rational(1);
                     } else {
                         // the var is a parameter
-                        exprBounds = exprBounds && manager->rational(0) < var && var < manager->rational(1);
+                        auto lb = storm::utility::convertNumber<storm::RationalNumber>(region.getLowerBoundary(var.getName()));
+                        auto ub = storm::utility::convertNumber<storm::RationalNumber>(region.getUpperBoundary(var.getName()));
+                        exprBounds = exprBounds && manager->rational(lb) < var && var < manager->rational(ub);
                     }
                 }
 
diff --git a/src/storm-pars/analysis/AssumptionChecker.h b/src/storm-pars/analysis/AssumptionChecker.h
index 3f98189ae..c1e58dd69 100644
--- a/src/storm-pars/analysis/AssumptionChecker.h
+++ b/src/storm-pars/analysis/AssumptionChecker.h
@@ -6,6 +6,7 @@
 #include "storm/models/sparse/Mdp.h"
 #include "storm/environment/Environment.h"
 #include "storm/storage/expressions/BinaryRelationExpression.h"
+#include "storm-pars/storage/ParameterRegion.h"
 #include "Lattice.h"
 
 namespace storm {
@@ -29,7 +30,7 @@ namespace storm {
              * @param model The dtmc model to check the formula on.
              * @param numberOfSamples Number of sample points.
              */
-            AssumptionChecker(std::shared_ptr<logic::Formula const> formula, std::shared_ptr<models::sparse::Dtmc<ValueType>> model, uint_fast64_t numberOfSamples);
+            AssumptionChecker(std::shared_ptr<logic::Formula const> formula, std::shared_ptr<models::sparse::Dtmc<ValueType>> model, storm::storage::ParameterRegion<ValueType> region, uint_fast64_t numberOfSamples);
 
             /*!
              * Constructs an AssumptionChecker based on the number of samples, for the given formula and model.
@@ -81,6 +82,8 @@ namespace storm {
                     typename storage::SparseMatrix<ValueType>::iterator state2succ1,
                     typename storage::SparseMatrix<ValueType>::iterator state2succ2);
 
+            storm::storage::ParameterRegion<ValueType> region;
+
         };
     }
 }
diff --git a/src/storm-pars/analysis/LatticeExtender.h b/src/storm-pars/analysis/LatticeExtender.h
index 7497aa594..4899fdf46 100644
--- a/src/storm-pars/analysis/LatticeExtender.h
+++ b/src/storm-pars/analysis/LatticeExtender.h
@@ -6,6 +6,7 @@
 #include "storm-pars/analysis/Lattice.h"
 #include "storm/api/storm.h"
 
+
 namespace storm {
     namespace analysis {
 
diff --git a/src/storm-pars/analysis/MonotonicityChecker.cpp b/src/storm-pars/analysis/MonotonicityChecker.cpp
index 93a70c46b..f451f7df7 100644
--- a/src/storm-pars/analysis/MonotonicityChecker.cpp
+++ b/src/storm-pars/analysis/MonotonicityChecker.cpp
@@ -23,7 +23,7 @@
 namespace storm {
     namespace analysis {
         template <typename ValueType>
-        MonotonicityChecker<ValueType>::MonotonicityChecker(std::shared_ptr<storm::models::ModelBase> model, std::vector<std::shared_ptr<storm::logic::Formula const>> formulas, bool validate, uint_fast64_t numberOfSamples, double const& precision) {
+        MonotonicityChecker<ValueType>::MonotonicityChecker(std::shared_ptr<storm::models::ModelBase> model, std::vector<std::shared_ptr<storm::logic::Formula const>> formulas,  std::vector<storm::storage::ParameterRegion<ValueType>> regions, bool validate, uint_fast64_t numberOfSamples, double const& precision) {
             assert (model != nullptr);
             this->model = model;
             this->formulas = formulas;
@@ -46,6 +46,24 @@ namespace storm {
             }
 
             std::shared_ptr<storm::models::sparse::Model<ValueType>> sparseModel = model->as<storm::models::sparse::Model<ValueType>>();
+
+            if (regions.size() == 1) {
+                region = *(regions.begin());
+            } else {
+                assert (regions.size() == 0);
+                typename storm::storage::ParameterRegion<ValueType>::Valuation lowerBoundaries;
+                typename storm::storage::ParameterRegion<ValueType>::Valuation upperBoundaries;
+                std::set<typename storm::storage::ParameterRegion<ValueType>::VariableType> vars;
+                vars = storm::models::sparse::getProbabilityParameters(*sparseModel);
+                for (auto var : vars) {
+                    typename storm::storage::ParameterRegion<ValueType>::CoefficientType lb = storm::utility::convertNumber<typename storm::storage::ParameterRegion<ValueType>::CoefficientType>(0 + precision);
+                    typename storm::storage::ParameterRegion<ValueType>::CoefficientType ub = storm::utility::convertNumber<typename storm::storage::ParameterRegion<ValueType>::CoefficientType>(1 - precision);
+                    lowerBoundaries.insert(std::make_pair(var, lb));
+                    upperBoundaries.insert(std::make_pair(var, ub));
+                }
+                region =  storm::storage::ParameterRegion<ValueType>(std::move(lowerBoundaries), std::move(upperBoundaries));
+            }
+
             this->extender = new storm::analysis::LatticeExtender<ValueType>(sparseModel);
         }
 
@@ -173,7 +191,7 @@ namespace storm {
                 storm::analysis::AssumptionChecker<ValueType> *assumptionChecker;
                 if (model->isOfType(storm::models::ModelType::Dtmc)) {
                     auto dtmc = model->as<storm::models::sparse::Dtmc<ValueType>>();
-                    assumptionChecker = new storm::analysis::AssumptionChecker<ValueType>(formulas[0], dtmc, 3);
+                    assumptionChecker = new storm::analysis::AssumptionChecker<ValueType>(formulas[0], dtmc, region, 3);
                 } else if (model->isOfType(storm::models::ModelType::Mdp)) {
                     auto mdp = model->as<storm::models::sparse::Mdp<ValueType>>();
                     assumptionChecker = new storm::analysis::AssumptionChecker<ValueType>(formulas[0], mdp, 3);
@@ -348,7 +366,7 @@ namespace storm {
                                             // As the first state (itr2) is above the second state (itr3) it
                                             // is sufficient to look at the derivative of itr2.
                                             std::pair<bool, bool> mon2;
-                                            mon2 = checkDerivative(derivative2);
+                                            mon2 = checkDerivative(derivative2, region);
                                             value->first &= mon2.first;
                                             value->second &= mon2.second;
                                         } else if (compare == Lattice::BELOW) {
@@ -356,7 +374,7 @@ namespace storm {
                                             // is sufficient to look at the derivative of itr3.
                                             std::pair<bool, bool> mon3;
 
-                                            mon3 = checkDerivative(derivative3);
+                                            mon3 = checkDerivative(derivative3, region);
                                             value->first &= mon3.first;
                                             value->second &= mon3.second;
                                         } else if (compare == Lattice::SAME) {
@@ -381,7 +399,7 @@ namespace storm {
                             std::pair<bool, bool> *value = &varsMonotone.find(var)->second;
                             bool change = false;
                             for (auto const &i : sortedStates) {
-                                auto res = checkDerivative(getDerivative(transitions[i], var));
+                                auto res = checkDerivative(getDerivative(transitions[i], var), region);
                                 change = change || (!(value->first && value->second) // they do not hold both
                                                     && ((value->first && !res.first)
                                                         || (value->second && !res.second)));
@@ -466,7 +484,7 @@ namespace storm {
                                         // As the first state (itr2) is above the second state (itr3) it
                                         // is sufficient to look at the derivative of itr2.
                                         std::pair<bool, bool> mon2;
-                                        mon2 = checkDerivative(derivative2);
+                                        mon2 = checkDerivative(derivative2, region);
                                         value->first &= mon2.first;
                                         value->second &= mon2.second;
                                     } else if (compare == Lattice::BELOW) {
@@ -474,7 +492,7 @@ namespace storm {
                                         // is sufficient to look at the derivative of itr3.
                                         std::pair<bool, bool> mon3;
 
-                                        mon3 = checkDerivative(derivative3);
+                                        mon3 = checkDerivative(derivative3, region);
                                         value->first &= mon3.first;
                                         value->second &= mon3.second;
                                     } else if (compare == Lattice::SAME) {
diff --git a/src/storm-pars/analysis/MonotonicityChecker.h b/src/storm-pars/analysis/MonotonicityChecker.h
index 5d6b60ba4..0ef738154 100644
--- a/src/storm-pars/analysis/MonotonicityChecker.h
+++ b/src/storm-pars/analysis/MonotonicityChecker.h
@@ -30,12 +30,13 @@ namespace storm {
              * Constructor of MonotonicityChecker
              * @param model the model considered
              * @param formula the formula considered
+             * @param regions the regions to consider
              * @param validate whether or not assumptions are to be validated
              * @param numberOfSamples number of samples taken for monotonicity checking, default 0,
-             *          if 0then no check on samples is executed
+             *          if 0 then no check on samples is executed
              * @param precision precision on which the samples are compared
              */
-            MonotonicityChecker(std::shared_ptr<storm::models::ModelBase> model, std::vector<std::shared_ptr<storm::logic::Formula const>> formulas, bool validate, uint_fast64_t numberOfSamples=0, double const& precision=0.000001);
+            MonotonicityChecker(std::shared_ptr<storm::models::ModelBase> model, std::vector<std::shared_ptr<storm::logic::Formula const>> formulas, std::vector<storm::storage::ParameterRegion<ValueType>> regions, bool validate, uint_fast64_t numberOfSamples=0, double const& precision=0.000001);
 
             /*!
              * Checks for model and formula as provided in constructor for monotonicity
@@ -52,7 +53,7 @@ namespace storm {
              * @param derivative The derivative you want to check
              * @return pair of bools, >= 0 and <= 0
              */
-            static std::pair<bool, bool> checkDerivative(ValueType derivative) {
+            static std::pair<bool, bool> checkDerivative(ValueType derivative, storm::storage::ParameterRegion<ValueType> reg) {
                 bool monIncr = false;
                 bool monDecr = false;
 
@@ -80,7 +81,9 @@ namespace storm {
                     storm::expressions::Expression exprBounds = manager->boolean(true);
                     auto managervars = manager->getVariables();
                     for (auto var : managervars) {
-                        exprBounds = exprBounds && manager->rational(0) < var && var < manager->rational(1);
+                        auto lb = storm::utility::convertNumber<storm::RationalNumber>(reg.getLowerBoundary(var.getName()));
+                        auto ub = storm::utility::convertNumber<storm::RationalNumber>(reg.getUpperBoundary(var.getName()));
+                        exprBounds = exprBounds && manager->rational(lb) < var && var < manager->rational(ub);
                     }
                     assert (s.check() == storm::solver::SmtSolver::CheckResult::Sat);
 
@@ -112,7 +115,6 @@ namespace storm {
         private:
             std::map<storm::analysis::Lattice*, std::map<typename utility::parametric::VariableType<ValueType>::type, std::pair<bool, bool>>> checkMonotonicity(std::map<storm::analysis::Lattice*, std::vector<std::shared_ptr<storm::expressions::BinaryRelationExpression>>> map, storm::storage::SparseMatrix<ValueType> matrix);
 
-            //TODO: variabele type
             std::map<typename utility::parametric::VariableType<ValueType>::type, std::pair<bool, bool>> analyseMonotonicity(uint_fast64_t i, Lattice* lattice, storm::storage::SparseMatrix<ValueType> matrix) ;
 
             std::map<Lattice*, std::vector<std::shared_ptr<storm::expressions::BinaryRelationExpression>>> createLattice();
@@ -144,6 +146,8 @@ namespace storm {
             std::string filename = "monotonicity.txt";
 
             double precision;
+
+            storm::storage::ParameterRegion<ValueType> region;
         };
     }
 }
diff --git a/src/storm-pars/storage/ParameterRegion.cpp b/src/storm-pars/storage/ParameterRegion.cpp
index 3d9e36c93..68d6e94dc 100644
--- a/src/storm-pars/storage/ParameterRegion.cpp
+++ b/src/storm-pars/storage/ParameterRegion.cpp
@@ -48,6 +48,16 @@ namespace storm {
             return (*result).second;
         }
 
+        template<typename ParametricType>
+        typename ParameterRegion<ParametricType>::CoefficientType const& ParameterRegion<ParametricType>::getLowerBoundary(const std::string varName) const {
+            for (auto itr = lowerBoundaries.begin(); itr != lowerBoundaries.end(); ++itr) {
+                if (itr->first.name().compare(varName) == 0) {
+                    return (*itr).second;
+                }
+            }
+            STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Tried to find a lower boundary for variableName " << varName << " which is not specified by this region");
+        }
+
         template<typename ParametricType>
         typename ParameterRegion<ParametricType>::CoefficientType const& ParameterRegion<ParametricType>::getUpperBoundary(VariableType const& variable) const {
             auto const& result = upperBoundaries.find(variable);
@@ -55,6 +65,16 @@ namespace storm {
             return (*result).second;
         }
 
+        template<typename ParametricType>
+        typename ParameterRegion<ParametricType>::CoefficientType const& ParameterRegion<ParametricType>::getUpperBoundary(const std::string varName) const {
+            for (auto itr = upperBoundaries.begin(); itr != upperBoundaries.end(); ++itr) {
+                if (itr->first.name().compare(varName) == 0) {
+                    return (*itr).second;
+                }
+            }
+            STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Tried to find an upper boundary for variableName " << varName << " which is not specified by this region");
+        }
+
         template<typename ParametricType>
         typename ParameterRegion<ParametricType>::Valuation const& ParameterRegion<ParametricType>::getUpperBoundaries() const {
             return upperBoundaries;
diff --git a/src/storm-pars/storage/ParameterRegion.h b/src/storm-pars/storage/ParameterRegion.h
index bcdd86ccb..d4f3ce457 100644
--- a/src/storm-pars/storage/ParameterRegion.h
+++ b/src/storm-pars/storage/ParameterRegion.h
@@ -24,7 +24,9 @@ namespace storm {
 
             std::set<VariableType> const& getVariables() const;
             CoefficientType const& getLowerBoundary(VariableType const& variable) const;
+            CoefficientType const& getLowerBoundary(const std::string varName) const;
             CoefficientType const& getUpperBoundary(VariableType const& variable) const;
+            CoefficientType const& getUpperBoundary(const std::string varName) const;
             Valuation const& getLowerBoundaries() const;
             Valuation const& getUpperBoundaries() const;
 
diff --git a/src/test/storm-pars/analysis/AssumptionCheckerTest.cpp b/src/test/storm-pars/analysis/AssumptionCheckerTest.cpp
index 93fc5955b..08e7319a6 100644
--- a/src/test/storm-pars/analysis/AssumptionCheckerTest.cpp
+++ b/src/test/storm-pars/analysis/AssumptionCheckerTest.cpp
@@ -1,8 +1,3 @@
-//
-// Created by Jip Spel on 19.09.18.
-//
-
-// TODO: cleanup includes
 #include "gtest/gtest.h"
 #include "storm-config.h"
 #include "test/storm_gtest.h"
@@ -21,12 +16,16 @@
 #include "storm-pars/analysis/Lattice.h"
 #include "storm/storage/expressions/BinaryRelationExpression.h"
 #include "storm-pars/transformer/SparseParametricDtmcSimplifier.h"
+#include "storm-pars/storage/ParameterRegion.h"
 
 #include "storm-pars/api/storm-pars.h"
 #include "storm/api/storm.h"
 
 #include "storm-parsers/api/storm-parsers.h"
 
+#include "storm-pars/api/region.h"
+
+
 TEST(AssumptionCheckerTest, Brp_no_bisimulation) {
     std::string programFile = STORM_TEST_RESOURCES_DIR "/pdtmc/brp16_2.pm";
     std::string formulaAsString = "P=? [F s=4 & i=N ]";
@@ -47,7 +46,13 @@ TEST(AssumptionCheckerTest, Brp_no_bisimulation) {
     ASSERT_EQ(dtmc->getNumberOfStates(), 193ull);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 383ull);
 
-    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    // Create the region
+    storm::storage::ParameterRegion<storm::RationalFunction>::Valuation lowerBoundaries;
+    storm::storage::ParameterRegion<storm::RationalFunction>::Valuation upperBoundaries;
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= pK <= 0.00001, 0.00001 <= pL <= 0.99999", vars);
+
+    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
 
     // Check on samples
     auto expressionManager = std::make_shared<storm::expressions::ExpressionManager>(storm::expressions::ExpressionManager());
@@ -126,7 +131,11 @@ TEST(AssumptionCheckerTest, Simple1) {
     ASSERT_EQ(dtmc->getNumberOfStates(), 5);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 8);
 
-    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= p <= 0.99999", vars);
+
+    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
 
     auto expressionManager = std::make_shared<storm::expressions::ExpressionManager>(storm::expressions::ExpressionManager());
     expressionManager->declareRationalVariable("1");
@@ -174,7 +183,11 @@ TEST(AssumptionCheckerTest, Simple2) {
     ASSERT_EQ(dtmc->getNumberOfStates(), 5);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 8);
 
-    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= p <= 0.99999", vars);
+
+    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
 
     auto expressionManager = std::make_shared<storm::expressions::ExpressionManager>(storm::expressions::ExpressionManager());
     expressionManager->declareRationalVariable("1");
@@ -234,7 +247,11 @@ TEST(AssumptionCheckerTest, Simple3) {
     ASSERT_EQ(6, dtmc->getNumberOfStates());
     ASSERT_EQ(12, dtmc->getNumberOfTransitions());
 
-    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= p <= 0.99999", vars);
+
+    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
 
     auto expressionManager = std::make_shared<storm::expressions::ExpressionManager>(storm::expressions::ExpressionManager());
     expressionManager->declareRationalVariable("1");
@@ -278,4 +295,70 @@ TEST(AssumptionCheckerTest, Simple3) {
     EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.validateAssumptionSMTSolver(assumption, lattice));
 }
 
+TEST(AssumptionCheckerTest, Simple4) {
+    std::string programFile = STORM_TEST_RESOURCES_DIR "/pdtmc/simple4.pm";
+    std::string formulaAsString = "P=? [F s=3]";
+    std::string constantsAsString = ""; //e.g. pL=0.9,TOACK=0.5
 
+    // Program and formula
+    storm::prism::Program program = storm::api::parseProgram(programFile);
+    program = storm::utility::prism::preprocess(program, constantsAsString);
+    std::vector<std::shared_ptr<const storm::logic::Formula>> formulas = storm::api::extractFormulasFromProperties(storm::api::parsePropertiesForPrismProgram(formulaAsString, program));
+    std::shared_ptr<storm::models::sparse::Dtmc<storm::RationalFunction>> model = storm::api::buildSparseModel<storm::RationalFunction>(program, formulas)->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
+    std::shared_ptr<storm::models::sparse::Dtmc<storm::RationalFunction>> dtmc = model->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
+    auto simplifier = storm::transformer::SparseParametricDtmcSimplifier<storm::models::sparse::Dtmc<storm::RationalFunction>>(*dtmc);
+    ASSERT_TRUE(simplifier.simplify(*(formulas[0])));
+    model = simplifier.getSimplifiedModel();
+    dtmc = model->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
+
+    ASSERT_EQ(dtmc->getNumberOfStates(), 5);
+    ASSERT_EQ(dtmc->getNumberOfTransitions(), 8);
+
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= p <= 0.4", vars);
+
+    auto checker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
+
+    auto expressionManager = std::make_shared<storm::expressions::ExpressionManager>(storm::expressions::ExpressionManager());
+    expressionManager->declareRationalVariable("1");
+    expressionManager->declareRationalVariable("2");
+
+    // Lattice
+    storm::storage::BitVector above(5);
+    above.set(3);
+    storm::storage::BitVector below(5);
+    below.set(4);
+    storm::storage::BitVector initialMiddle(5);
+    auto lattice = new storm::analysis::Lattice(&above, &below, &initialMiddle, 5);
+    
+    auto assumption = std::make_shared<storm::expressions::BinaryRelationExpression>(
+            storm::expressions::BinaryRelationExpression(*expressionManager, expressionManager->getBooleanType(),
+                                                         expressionManager->getVariable("1").getExpression().getBaseExpressionPointer(),
+                                                         expressionManager->getVariable("2").getExpression().getBaseExpressionPointer(),
+                                                         storm::expressions::BinaryRelationExpression::RelationType::Greater));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.checkOnSamples(assumption));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.validateAssumption(assumption, lattice));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.validateAssumptionSMTSolver(assumption, lattice));
+
+    assumption = std::make_shared<storm::expressions::BinaryRelationExpression>(
+            storm::expressions::BinaryRelationExpression(*expressionManager, expressionManager->getBooleanType(),
+                                                         expressionManager->getVariable("2").getExpression().getBaseExpressionPointer(),
+                                                         expressionManager->getVariable("1").getExpression().getBaseExpressionPointer(),
+                                                         storm::expressions::BinaryRelationExpression::RelationType::Greater));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::UNKNOWN, checker.checkOnSamples(assumption));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::VALID, checker.validateAssumption(assumption, lattice));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::VALID, checker.validateAssumptionSMTSolver(assumption, lattice));
+
+    assumption = std::make_shared<storm::expressions::BinaryRelationExpression>(
+            storm::expressions::BinaryRelationExpression(*expressionManager, expressionManager->getBooleanType(),
+                                                         expressionManager->getVariable("1").getExpression().getBaseExpressionPointer(),
+                                                         expressionManager->getVariable("2").getExpression().getBaseExpressionPointer(),
+                                                         storm::expressions::BinaryRelationExpression::RelationType::Equal));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.checkOnSamples(assumption));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.validateAssumption(assumption, lattice));
+    EXPECT_EQ(storm::analysis::AssumptionStatus::INVALID, checker.validateAssumptionSMTSolver(assumption, lattice));
+
+
+
+}
diff --git a/src/test/storm-pars/analysis/AssumptionMakerTest.cpp b/src/test/storm-pars/analysis/AssumptionMakerTest.cpp
index bcdac1227..71b7b1e7f 100644
--- a/src/test/storm-pars/analysis/AssumptionMakerTest.cpp
+++ b/src/test/storm-pars/analysis/AssumptionMakerTest.cpp
@@ -28,7 +28,6 @@
 
 #include "storm-parsers/api/storm-parsers.h"
 
-//TODO: voor als validate uit staat
 TEST(AssumptionMakerTest, Brp_without_bisimulation) {
     std::string programFile = STORM_TEST_RESOURCES_DIR "/pdtmc/brp16_2.pm";
     std::string formulaAsString = "P=? [F s=4 & i=N ]";
@@ -45,6 +44,10 @@ TEST(AssumptionMakerTest, Brp_without_bisimulation) {
     model = simplifier.getSimplifiedModel();
     dtmc = model->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
 
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= pK <= 0.999999, 0.00001 <= pL <= 0.999999", vars);
+
     ASSERT_EQ(dtmc->getNumberOfStates(), 193ull);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 383ull);
 
@@ -53,7 +56,7 @@ TEST(AssumptionMakerTest, Brp_without_bisimulation) {
     ASSERT_EQ(183, std::get<1>(criticalTuple));
     ASSERT_EQ(186, std::get<2>(criticalTuple));
 
-    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
     auto assumptionMaker = storm::analysis::AssumptionMaker<storm::RationalFunction>(&assumptionChecker, dtmc->getNumberOfStates(), true);
     auto result = assumptionMaker.createAndCheckAssumption(std::get<1>(criticalTuple), std::get<2>(criticalTuple), std::get<0>(criticalTuple));
 
@@ -111,6 +114,10 @@ TEST(AssumptionMakerTest, Brp_without_bisimulation_no_validation) {
     model = simplifier.getSimplifiedModel();
     dtmc = model->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
 
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= pK <= 0.999999, 0.00001 <= pL <= 0.999999", vars);
+
     ASSERT_EQ(dtmc->getNumberOfStates(), 193ull);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 383ull);
 
@@ -119,7 +126,7 @@ TEST(AssumptionMakerTest, Brp_without_bisimulation_no_validation) {
     ASSERT_EQ(183, std::get<1>(criticalTuple));
     ASSERT_EQ(186, std::get<2>(criticalTuple));
 
-    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
     // This one does not validate the assumptions!
     auto assumptionMaker = storm::analysis::AssumptionMaker<storm::RationalFunction>(&assumptionChecker, dtmc->getNumberOfStates(), false);
     auto result = assumptionMaker.createAndCheckAssumption(std::get<1>(criticalTuple), std::get<2>(criticalTuple), std::get<0>(criticalTuple));
@@ -177,6 +184,10 @@ TEST(AssumptionMakerTest, Simple1) {
     model = simplifier.getSimplifiedModel();
     dtmc = model->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
 
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= p <= 0.999999", vars);
+
     ASSERT_EQ(dtmc->getNumberOfStates(), 5);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 8);
 
@@ -188,7 +199,7 @@ TEST(AssumptionMakerTest, Simple1) {
 
     auto lattice = new storm::analysis::Lattice(&above, &below, &initialMiddle, 5);
 
-    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
     auto assumptionMaker = storm::analysis::AssumptionMaker<storm::RationalFunction>(&assumptionChecker, dtmc->getNumberOfStates(), true);
     auto result = assumptionMaker.createAndCheckAssumption(1, 2, lattice);
 
@@ -244,6 +255,9 @@ TEST(AssumptionMakerTest, Simple2) {
     ASSERT_TRUE(simplifier.simplify(*(formulas[0])));
     model = simplifier.getSimplifiedModel();
     dtmc = model->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
+    // Create the region
+    auto vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    auto region = storm::api::parseRegion<storm::RationalFunction>("0.00001 <= p <= 0.999999", vars);
 
     ASSERT_EQ(dtmc->getNumberOfStates(), 5);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 8);
@@ -256,7 +270,7 @@ TEST(AssumptionMakerTest, Simple2) {
 
     auto lattice = new storm::analysis::Lattice(&above, &below, &initialMiddle, 5);
 
-    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, 3);
+    auto assumptionChecker = storm::analysis::AssumptionChecker<storm::RationalFunction>(formulas[0], dtmc, region, 3);
     auto assumptionMaker = storm::analysis::AssumptionMaker<storm::RationalFunction>(&assumptionChecker, dtmc->getNumberOfStates(), true);
     auto result = assumptionMaker.createAndCheckAssumption(1, 2, lattice);
 
diff --git a/src/test/storm-pars/analysis/MonotonicityCheckerTest.cpp b/src/test/storm-pars/analysis/MonotonicityCheckerTest.cpp
index 27ba61483..4dfc2e38b 100644
--- a/src/test/storm-pars/analysis/MonotonicityCheckerTest.cpp
+++ b/src/test/storm-pars/analysis/MonotonicityCheckerTest.cpp
@@ -27,55 +27,83 @@
 
 #include "storm-parsers/api/storm-parsers.h"
 TEST(MonotonicityCheckerTest, Derivative_checker) {
+
+    // Create the region
+    typename storm::storage::ParameterRegion<storm::RationalFunction>::Valuation lowerBoundaries;
+    typename storm::storage::ParameterRegion<storm::RationalFunction>::Valuation upperBoundaries;
+    auto region =  storm::storage::ParameterRegion<storm::RationalFunction>(std::move(lowerBoundaries), std::move(upperBoundaries));
+
     // Derivative 0
     auto constFunction = storm::RationalFunction(0);
-    auto constFunctionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(constFunction);
+    auto constFunctionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(constFunction, region);
     EXPECT_TRUE(constFunctionRes.first);
     EXPECT_TRUE(constFunctionRes.second);
 
     // Derivative 5
     constFunction = storm::RationalFunction(5);
-    constFunctionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(constFunction);
+    constFunctionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(constFunction, region);
     EXPECT_TRUE(constFunctionRes.first);
     EXPECT_FALSE(constFunctionRes.second);
 
     // Derivative -4
     constFunction = storm::RationalFunction(storm::RationalFunction(1)-constFunction);
-    constFunctionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(constFunction);
+    constFunctionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(constFunction, region);
     EXPECT_FALSE(constFunctionRes.first);
     EXPECT_TRUE(constFunctionRes.second);
 
     std::shared_ptr<storm::RawPolynomialCache> cache = std::make_shared<storm::RawPolynomialCache>();
     carl::StringParser parser;
     parser.setVariables({"p", "q"});
+
+    // Create the region
+    auto functionP = storm::RationalFunction(storm::Polynomial(parser.template parseMultivariatePolynomial<storm::RationalFunctionCoefficient>("p"), cache));
+    auto functionQ = storm::RationalFunction(storm::Polynomial(parser.template parseMultivariatePolynomial<storm::RationalFunctionCoefficient>("q"), cache));
+
+    auto varsP = functionP.gatherVariables();
+    auto varsQ = functionQ.gatherVariables();
+    storm::utility::parametric::Valuation<storm::RationalFunction> lowerBoundaries2;
+    storm::utility::parametric::Valuation<storm::RationalFunction> upperBoundaries2;
+    for (auto var : varsP) {
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType lb = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(0 + 0.000001);
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType ub = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(1 - 0.000001);
+        lowerBoundaries2.emplace(std::make_pair(var, lb));
+        upperBoundaries2.emplace(std::make_pair(var, ub));
+    }
+    for (auto var : varsQ) {
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType lb = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(0 + 0.000001);
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType ub = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(1 - 0.000001);
+        lowerBoundaries2.emplace(std::make_pair(var, lb));
+        upperBoundaries2.emplace(std::make_pair(var, ub));
+    }
+    region = storm::storage::ParameterRegion<storm::RationalFunction>(std::move(lowerBoundaries2), std::move(upperBoundaries2));
+
     // Derivative p
-    auto function = storm::RationalFunction(storm::Polynomial(parser.template parseMultivariatePolynomial<storm::RationalFunctionCoefficient>("p"), cache));
-    auto functionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(function);
+    auto function = functionP;
+    auto functionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(function, region);
     EXPECT_TRUE(functionRes.first);
     EXPECT_FALSE(functionRes.second);
 
     // Derivative 1-p
     auto functionDecr = storm::RationalFunction(storm::RationalFunction(1)-function);
-    auto functionDecrRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(functionDecr);
+    auto functionDecrRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(functionDecr, region);
     EXPECT_TRUE(functionDecrRes.first);
     EXPECT_FALSE(functionDecrRes.second);
 
     // Derivative 1-2p
     auto functionNonMonotonic = storm::RationalFunction(storm::RationalFunction(1)-storm::RationalFunction(2)*function);
-    auto functionNonMonotonicRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(functionNonMonotonic);
+    auto functionNonMonotonicRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(functionNonMonotonic, region);
     EXPECT_FALSE(functionNonMonotonicRes.first);
     EXPECT_FALSE(functionNonMonotonicRes.second);
 
     // Derivative -p
     functionDecr = storm::RationalFunction(storm::RationalFunction(0)-function);
-    functionDecrRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(functionDecr);
+    functionDecrRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(functionDecr, region);
     EXPECT_FALSE(functionDecrRes.first);
     EXPECT_TRUE(functionDecrRes.second);
 
     // Derivative p*q
-    function = storm::RationalFunction(storm::Polynomial(parser.template parseMultivariatePolynomial<storm::RationalFunctionCoefficient>("p"), cache))
-               * storm::RationalFunction(storm::Polynomial(parser.template parseMultivariatePolynomial<storm::RationalFunctionCoefficient>("q"), cache))  ;
-    functionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(function);
+    function = functionP * functionQ ;
+    functionRes = storm::analysis::MonotonicityChecker<storm::RationalFunction>::checkDerivative(function, region);
     EXPECT_TRUE(functionRes.first);
     EXPECT_FALSE(functionRes.second);
 }
@@ -103,10 +131,24 @@ TEST(MonotonicityCheckerTest, Brp_with_bisimulation_no_samples) {
 
     dtmc = storm::api::performBisimulationMinimization<storm::RationalFunction>(model, formulas, bisimType)->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
 
+
+    // Create the region
+    typename storm::storage::ParameterRegion<storm::RationalFunction>::Valuation lowerBoundaries;
+    typename storm::storage::ParameterRegion<storm::RationalFunction>::Valuation upperBoundaries;
+    std::set<typename storm::storage::ParameterRegion<storm::RationalFunction>::VariableType> vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    for (auto var : vars) {
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType lb = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(0 + 0.000001);
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType ub = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(1 - 0.000001);
+        lowerBoundaries.emplace(std::make_pair(var, lb));
+        upperBoundaries.emplace(std::make_pair(var, ub));
+    }
+    auto region =  storm::storage::ParameterRegion<storm::RationalFunction>(std::move(lowerBoundaries), std::move(upperBoundaries));
+std::vector<storm::storage::ParameterRegion<storm::RationalFunction>> regions = {region};
+
     ASSERT_EQ(dtmc->getNumberOfStates(), 99ull);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 195ull);
 
-    storm::analysis::MonotonicityChecker<storm::RationalFunction> monotonicityChecker = storm::analysis::MonotonicityChecker<storm::RationalFunction>(dtmc, formulas, true);
+    storm::analysis::MonotonicityChecker<storm::RationalFunction> monotonicityChecker = storm::analysis::MonotonicityChecker<storm::RationalFunction>(dtmc, formulas, regions, true);
     auto result = monotonicityChecker.checkMonotonicity();
     EXPECT_EQ(1, result.size());
     EXPECT_EQ(2, result.begin()->second.size());
@@ -138,10 +180,23 @@ TEST(MonotonicityCheckerTest, Brp_with_bisimulation_samples) {
 
     dtmc = storm::api::performBisimulationMinimization<storm::RationalFunction>(model, formulas, bisimType)->as<storm::models::sparse::Dtmc<storm::RationalFunction>>();
 
+    // Create the region
+    typename storm::storage::ParameterRegion<storm::RationalFunction>::Valuation lowerBoundaries;
+    typename storm::storage::ParameterRegion<storm::RationalFunction>::Valuation upperBoundaries;
+    std::set<typename storm::storage::ParameterRegion<storm::RationalFunction>::VariableType> vars = storm::models::sparse::getProbabilityParameters(*dtmc);
+    for (auto var : vars) {
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType lb = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(0 + 0.000001);
+        typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType ub = storm::utility::convertNumber<typename storm::storage::ParameterRegion<storm::RationalFunction>::CoefficientType>(1 - 0.000001);
+        lowerBoundaries.emplace(std::make_pair(var, lb));
+        upperBoundaries.emplace(std::make_pair(var, ub));
+    }
+    auto region =  storm::storage::ParameterRegion<storm::RationalFunction>(std::move(lowerBoundaries), std::move(upperBoundaries));
+    std::vector<storm::storage::ParameterRegion<storm::RationalFunction>> regions = {region};
+
     ASSERT_EQ(dtmc->getNumberOfStates(), 99ull);
     ASSERT_EQ(dtmc->getNumberOfTransitions(), 195ull);
 
-    storm::analysis::MonotonicityChecker<storm::RationalFunction> monotonicityChecker = storm::analysis::MonotonicityChecker<storm::RationalFunction>(dtmc, formulas, true, 50);
+    auto monotonicityChecker = storm::analysis::MonotonicityChecker<storm::RationalFunction>(dtmc, formulas, regions, true, 50);
     auto result = monotonicityChecker.checkMonotonicity();
     EXPECT_EQ(1, result.size());
     EXPECT_EQ(2, result.begin()->second.size());