diff --git a/examples/dtmc/synchronous_leader/leader3_5.pm b/examples/dtmc/synchronous_leader/leader3_5.pm
index 2a5e200dc..0703e733d 100644
--- a/examples/dtmc/synchronous_leader/leader3_5.pm
+++ b/examples/dtmc/synchronous_leader/leader3_5.pm
@@ -15,15 +15,15 @@ module counter
 	c : [1..N-1];
 	
 	// reading
-	[read] c<N-1 -> (c'=c+1);
+	[read] c<N-1 -> 1:(c'=c+1);
 	// finished reading
-	[read] c=N-1 -> (c'=c);
+	[read] c=N-1 -> 1:(c'=c);
 	//decide
-	[done] u1|u2|u3 -> (c'=c);
+	[done] u1|u2|u3 -> 1:(c'=c);
 	// pick again reset counter 
-	[retry] !(u1|u2|u3) -> (c'=1);
+	[retry] !(u1|u2|u3) -> 1:(c'=1);
 	// loop (when finished to avoid deadlocks)
-	[loop] s1=3 -> (c'=c);
+	[loop] s1=3 -> 1:(c'=c);
 	
 endmodule
 
@@ -56,18 +56,18 @@ module process1
 	             + 1/K : (s1'=1) & (p1'=3) & (v1'=3) & (u1'=true)
 	             + 1/K : (s1'=1) & (p1'=4) & (v1'=4) & (u1'=true);
 	// read
-	[read] s1=1 &  u1 & c<N-1 -> (u1'=(p1!=v2)) & (v1'=v2);
-	[read] s1=1 & !u1 & c<N-1 -> (u1'=false) & (v1'=v2) & (p1'=0);
+	[read] s1=1 &  u1 & c<N-1 -> 1:(u1'=(p1!=v2)) & (v1'=v2);
+	[read] s1=1 & !u1 & c<N-1 -> 1:(u1'=false) & (v1'=v2) & (p1'=0);
 	// read and move to decide
-	[read] s1=1 &  u1 & c=N-1 -> (s1'=2) & (u1'=(p1!=v2)) & (v1'=0) & (p1'=0);
-	[read] s1=1 & !u1 & c=N-1 -> (s1'=2) & (u1'=false) & (v1'=0);
+	[read] s1=1 &  u1 & c=N-1 -> 1:(s1'=2) & (u1'=(p1!=v2)) & (v1'=0) & (p1'=0);
+	[read] s1=1 & !u1 & c=N-1 -> 1:(s1'=2) & (u1'=false) & (v1'=0);
 	// deciding
 	// done
-	[done] s1=2 -> (s1'=3) & (u1'=false) & (v1'=0) & (p1'=0);
+	[done] s1=2 -> 1:(s1'=3) & (u1'=false) & (v1'=0) & (p1'=0);
 	//retry
-	[retry] s1=2 -> (s1'=0) & (u1'=false) & (v1'=0) & (p1'=0);
+	[retry] s1=2 -> 1:(s1'=0) & (u1'=false) & (v1'=0) & (p1'=0);
 	// loop (when finished to avoid deadlocks)
-	[loop] s1=3 -> (s1'=3);
+	[loop] s1=3 -> 1:(s1'=3);
 	
 endmodule
 
diff --git a/src/ir/Variable.cpp b/src/ir/Variable.cpp
index 4edc93b2f..082011655 100644
--- a/src/ir/Variable.cpp
+++ b/src/ir/Variable.cpp
@@ -25,8 +25,12 @@ Variable::Variable(uint_fast64_t index, std::string variableName, std::shared_pt
 	// Nothing to do here.
 }
 
-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)) {
+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) {
+	this->index = var.index;
+	this->variableName = newName;
+	if (var.initialValue != nullptr) {
+		this->initialValue = var.initialValue->clone(renaming, bools, ints);
+	}
 }
 
 // Return the name of the variable.