check if the expression contains execution.removeVariable*s

Testgenerator/src/main/java/de/fhmuenster/masterthesis/Testgenerator/bpmn/processfragmentation/BPMNVariableIOScanner.java

@@ -173,10 +173,13 @@ public class BPMNVariableIOScanner {
 						{						
 							case "delegateExpression":
 								String strExpression = expression.getValue(currentElement).toString();
-								Pattern pattern = Pattern.compile("\"(.*?)\"", Pattern.DOTALL);
-								Matcher matcher = pattern.matcher(strExpression);
-								while (matcher.find()) {
-									removeVars.add(matcher.group(1));	// Contains String with all variables from removeVar Expression
+								if(strExpression.contains("execution.removeVariable"))		// check the String for a removeVariable*s Expression	
+								{
+									Pattern pattern = Pattern.compile("\"(.*?)\"", Pattern.DOTALL);
+									Matcher matcher = pattern.matcher(strExpression);
+									while (matcher.find()) {
+										removeVars.add(matcher.group(1));					// Contains String with all variables from removeVar Expression
+									}
 								}
 								break;
 							default: