diff --git a/src/ir/IntegerVariable.cpp b/src/ir/IntegerVariable.cpp
index f98ff8861..0e6e2a4fe 100644
--- a/src/ir/IntegerVariable.cpp
+++ b/src/ir/IntegerVariable.cpp
@@ -46,7 +46,7 @@ std::shared_ptr<storm::ir::expressions::BaseExpression> IntegerVariable::getUppe
 // Build a string representation of the variable.
 std::string IntegerVariable::toString() const {
 	std::stringstream result;
-	result << "int_" << this->getName() << ": [" << lowerBound->toString() << ".." << upperBound->toString() << "]";
+	result << this->getName() << ": [" << lowerBound->toString() << ".." << upperBound->toString() << "]";
 	if (this->getInitialValue() != nullptr) {
 		result << " init " + this->getInitialValue()->toString();
 	}
diff --git a/src/ir/Module.cpp b/src/ir/Module.cpp
index 6bb8aa1aa..80aa288c3 100644
--- a/src/ir/Module.cpp
+++ b/src/ir/Module.cpp
@@ -32,16 +32,11 @@ Module::Module(std::string moduleName,
 	: moduleName(moduleName), booleanVariables(booleanVariables), integerVariables(integerVariables),
 	  booleanVariablesToIndexMap(booleanVariableToIndexMap),
 	  integerVariablesToIndexMap(integerVariableToIndexMap), commands(commands), actions(), actionsToCommandIndexMap() {
-	std::cout << "Created module " << this << ":" << std::endl << this->toString() << std::endl;
 	this->collectActions();
 }
 
 Module::Module(const Module& module, const std::string& moduleName, const std::map<std::string, std::string>& renaming, std::shared_ptr<VariableAdder> adder)
 	: moduleName(moduleName) {
-	std::cout << "Renaming module " << module.moduleName << " to " << moduleName << " with " << renaming.size() << " renamings:" << std::endl;
-	for (auto it: renaming) {
-		std::cout << "\t" << it.first << " -> " << it.second << std::endl;
-	}
 	this->booleanVariables.reserve(module.booleanVariables.size());
 	for (BooleanVariable it: module.booleanVariables) {
 		if (renaming.count(it.getName()) > 0) {
diff --git a/src/ir/Variable.cpp b/src/ir/Variable.cpp
index 1d762b4b4..4edc93b2f 100644
--- a/src/ir/Variable.cpp
+++ b/src/ir/Variable.cpp
@@ -27,7 +27,6 @@ Variable::Variable(uint_fast64_t index, std::string variableName, std::shared_pt
 
 Variable::Variable(const Variable& var, const std::string& newName, const std::map<std::string, std::string>& renaming, const std::map<std::string,uint_fast64_t>& bools, const std::map<std::string,uint_fast64_t>& ints)
 	: Variable(var.index, newName, var.initialValue->clone(renaming, bools, ints)) {
-	std::cout << "Cloning Variable " << var.variableName << " to " << newName << std::endl;
 }
 
 // Return the name of the variable.
diff --git a/src/ir/expressions/VariableExpression.h b/src/ir/expressions/VariableExpression.h
index d0fc4cf30..f7811e3e4 100644
--- a/src/ir/expressions/VariableExpression.h
+++ b/src/ir/expressions/VariableExpression.h
@@ -26,7 +26,6 @@ public:
 			std::shared_ptr<BaseExpression> upperBound = std::shared_ptr<storm::ir::expressions::BaseExpression>(nullptr))
 			: BaseExpression(type), index(index), variableName(variableName),
 			  lowerBound(lowerBound), upperBound(upperBound) {
-		std::cerr << "VariableExpression " << this->variableName << std::endl;
 	}
 
 	virtual ~VariableExpression() {
@@ -55,9 +54,7 @@ public:
 	}
 
 	virtual std::string toString() const {
-		std::stringstream result;
-		result << variableName << "(" << this->index << ")";
-		return result.str();
+		return this->variableName;
 	}
 	
 	virtual std::string dump(std::string prefix) const {
diff --git a/src/parser/PrismParser/VariableState.h b/src/parser/PrismParser/VariableState.h
index 58a716fd1..e6c99d9ab 100644
--- a/src/parser/PrismParser/VariableState.h
+++ b/src/parser/PrismParser/VariableState.h
@@ -135,7 +135,6 @@ public:
 	}
 
 	void prepareForSecondRun() {
-		std::cerr << "starting second run" << std::endl;
 		integerConstants_.clear();
 		booleanConstants_.clear();
 		doubleConstants_.clear();