diff --git a/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationHunkParser.java b/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationHunkParser.java
index 6989548..a400421 100644
--- a/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationHunkParser.java
+++ b/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationHunkParser.java
@@ -32,14 +32,7 @@ public class FixedViolationHunkParser extends FixedViolationParser {
 	@SuppressWarnings("unused")
 	private static Logger log = LoggerFactory.getLogger(FixedViolationHunkParser.class);
 	public String testingInfo = "";
-	/*
-	 * ResultType:
-	 * 0: normal GumTree results.
-	 * 1: null GumTree result.
-	 * 2: No source code changes.
-	 * 3: useless violations
-	 */
-	public int resultType = 0;
+	
 	public int nullMappingGumTreeResult = 0;
 	public int pureDeletions = 0;
 	public int largeHunk = 0;
@@ -59,14 +52,10 @@ public class FixedViolationHunkParser extends FixedViolationParser {
 		// TODO remove the modification of variable names or not? FIXME
 		List<HierarchicalActionSet> actionSets = parseChangedSourceCodeWithGumTree2(prevFile, revFile); // only remove non-statement source code, eg. method declaration 
 		
-		if (actionSets == null) {
-			this.resultType = 1;
-		} else if (actionSets.size() == 0) {
-			this.resultType = 2;
-		} else {
+		if (actionSets != null && actionSets.size() != 0) {
 			List<Violation> violations = readViolations(revFile.getName());
 			if (violations.size() == 0) {
-				this.resultType = 3;
+				this.resultType = 4;
 				return;
 			}
 //			List<DiffEntryHunk> diffentryHunks1 = new DiffEntryReader().readHunks2(diffentryFile);
diff --git a/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationParser.java b/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationParser.java
index fe13d9b..d1ab8b5 100644
--- a/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationParser.java
+++ b/src/main/java/edu/lu/uni/serval/FixPatternParser/violations/FixedViolationParser.java
@@ -29,6 +29,16 @@ public class FixedViolationParser extends Parser {
 	
 	private static Logger log = LoggerFactory.getLogger(FixedViolationParser.class);
 	
+	/*
+	 * ResultType:
+	 * 0: normal GumTree results.
+	 * 1: null GumTree result.
+	 * 2: No source code changes.
+	 * 3: No Statement Change.
+	 * 4: useless violations
+	 */
+	public int resultType = 0;
+	
 	private File positionFile = null;
 	protected String alarmTypes = "";
 	protected List<Violation> uselessViolations;
@@ -53,9 +63,11 @@ public class FixedViolationParser extends Parser {
 		// GumTree results
 		List<Action> gumTreeResults = new GumTreeComparer().compareTwoFilesWithGumTree(prevFile, revFile);
 		if (gumTreeResults == null) {
+			this.resultType = 1;
 			return null;
 		} else if (gumTreeResults.size() == 0){
 			System.err.println("#NoSourceCodeChange: " + revFile.getName());
+			this.resultType = 2;
 			return actionSets;
 		} else {
 			// Regroup GumTre results.
@@ -75,6 +87,7 @@ public class FixedViolationParser extends Parser {
 			actionSets = sorter.sortAscending();
 			
 			if (actionSets.size() == 0) {
+				this.resultType = 3;
 				System.err.println("#NoStatementChange: " + revFile.getName());
 			}
 			
diff --git a/src/main/java/edu/lu/uni/serval/MultipleThreadsParser/ParseFixPatternWorker.java b/src/main/java/edu/lu/uni/serval/MultipleThreadsParser/ParseFixPatternWorker.java
index a954aee..96f6a6e 100644
--- a/src/main/java/edu/lu/uni/serval/MultipleThreadsParser/ParseFixPatternWorker.java
+++ b/src/main/java/edu/lu/uni/serval/MultipleThreadsParser/ParseFixPatternWorker.java
@@ -77,6 +77,7 @@ public class ParseFixPatternWorker extends UntypedActor {
 			int nullGumTreeResults = 0;
 			int nullMappingGumTreeResults = 0;
 			int noSourceCodeChanges = 0;
+			int noStatementChanges = 0;
 			int pureDeletion = 0;
 			int expNums = 0;
 			int largeHunk = 0;
@@ -124,6 +125,8 @@ public class ParseFixPatternWorker extends UntypedActor {
 							System.err.println("#NullGumTreeResult: " + revFile.getName());
 						} else if (parser.resultType == 2) {
 							noSourceCodeChanges += countAlarms(positionFile);
+						} else if (parser.resultType == 3) {
+							noStatementChanges += countAlarms(positionFile);
 						}
 					} else {
 						editScripts.append(editScript);
@@ -185,7 +188,7 @@ public class ParseFixPatternWorker extends UntypedActor {
 			}
 			String statistic = "testAlarms: " + testAlarms + "\nnullGumTreeResults: " + nullGumTreeResults + "\nnullMappingGumTreeResults: " + nullMappingGumTreeResults +
 					"\nnoSourceCodeChanges: " + noSourceCodeChanges + "\npureDeletion: " + pureDeletion + "\nTimeout: " + expNums +
-					"\nlargeHunk: " + largeHunk + "\nnullSourceCode: " + nullSourceCode;
+					"\nlargeHunk: " + largeHunk + "\nnullSourceCode: " + nullSourceCode + "\nnoStatementChanges: " + noStatementChanges;
 			FileHelper.outputToFile("OUTPUT/statistic_" + id + ".list", statistic, false);
 
 			log.info("Worker #" + id +"Finish of parsing " + counter + " files...");
diff --git a/src/main/java/edu/lu/uni/serval/statistics/Statistic.java b/src/main/java/edu/lu/uni/serval/statistics/Statistic.java
index a558ef3..f49d27f 100644
--- a/src/main/java/edu/lu/uni/serval/statistics/Statistic.java
+++ b/src/main/java/edu/lu/uni/serval/statistics/Statistic.java
@@ -63,6 +63,7 @@ public class Statistic {
 		int noSourceCodeChagnes = 0;
 		int largeHunk = 0;
 		int nullSourceCode = 0;
+		int noStatementChanges = 0;
 		for (File file : files) {
 			String content = FileHelper.readFile(file);
 			BufferedReader reader = new BufferedReader(new StringReader(content));
@@ -85,7 +86,9 @@ public class Statistic {
 						largeHunk += Integer.parseInt(line.substring(line.lastIndexOf(":") + 1).trim());
 					} else if (line.startsWith("nullSourceCode")) {
 						nullSourceCode += Integer.parseInt(line.substring(line.lastIndexOf(":") + 1).trim());
-					} 
+					} else if (line.startsWith("noStatementChanges")) {
+						noStatementChanges += Integer.parseInt(line.substring(line.lastIndexOf(":") + 1).trim());
+					}
 				}
 			} catch (IOException e) {
 				e.printStackTrace();
@@ -121,6 +124,7 @@ public class Statistic {
 		System.out.println("noSourceCodeChange: " + noSourceCodeChagnes);
 		System.out.println("largeHunk: " + largeHunk);
 		System.out.println("nullSourceCode: " + nullSourceCode);
+		System.out.println("noStatementChanges: " + noStatementChanges);
 	}
 
 	public static void statistics(String fileName, String type) throws IOException {