output: #fixed code
                                  public static void main(String[] args) throws JDOMException, IOException, AnalysisException {
          if (args.length != 3) {
              System.err.println("USAGE: ReferenceParsingEvaluator <foldness> <model_path> <test_path>");
              System.exit(1);
          }
          
          int foldness = Integer.parseInt(args[0]);
          String modelPathSuffix = args[1];
          String testPathSuffix = args[2];
  
          Map<String, List<Result>> results = new HashMap<String, List<Result>>();
          
          for (int i = 0; i < foldness; i++) {
              System.out.println("Fold "+i);
              String modelPath = modelPathSuffix + i;
              CRFBibReferenceParser parser = new CRFBibReferenceParser(modelPath);
              
              String testPath = testPathSuffix + i;
  
              File testFile = new File(testPath);
              List<Citation> testCitations;
          
              InputStream testIS = null;
              try {
                  testIS = new FileInputStream(testFile);
                  InputSource testSource = new InputSource(testIS);
                  testCitations = NlmCitationExtractor.extractCitations(testSource);
              } finally {
                  if (testIS != null) {
                      testIS.close();
                  }
              }
              
              System.out.println(testCitations.size());
              
              List<BibEntry> testEntries = new ArrayList<BibEntry>();
  
              for (Citation c : testCitations) {
                  BibEntry entry = CitationUtils.citationToBibref(c);
                  testEntries.add(entry);
                  for (String key : entry.getFieldKeys()) {
                      if (results.get(key) == null) {
                          results.put(key, new ArrayList<Result>());
                      }
                  }
              }
              
              int j = 0;
              for (BibEntry orig : testEntries) {
                  BibEntry test = parser.parseBibReference(orig.getText());
  
                  System.out.println();
                  System.out.println();
                  System.out.println(orig.toBibTeX());
                  System.out.println(test.toBibTeX());
              
                  Map<String, Result> map = new HashMap<String, Result>();
                  for (String s : orig.getFieldKeys()) {
                      if (map.get(s) == null) {
                          map.put(s, new Result());
                      }
                      map.get(s).addOrig(orig.getAllFieldValues(s).size());
                  }
                  for (String s : test.getFieldKeys()) {
                      if (map.get(s) == null) {
                          map.put(s, new Result());
                      }
                      map.get(s).addExtr(test.getAllFieldValues(s).size());
                  }
                  for (String s : test.getFieldKeys()) {
                      List<String> origVals = orig.getAllFieldValues(s);
                      for (String testVal : test.getAllFieldValues(s)) {
                          boolean found = false;
                          if (origVals.contains(testVal)) {
                              map.get(s).addSuccess();
                              origVals.remove(testVal);
                              found = true;
                          }
                          if (!found) {
                              System.out.println("WRONG "+s);
                          }
                      }
                  }
                  
                  for (Map.Entry<String, Result> s : map.entrySet()) {
                      System.out.println("");
                      System.out.println(s.getKey());
                      System.out.println(s.getValue());
                      System.out.println(s.getValue().getPrecision());
                      System.out.println(s.getValue().getRecall());
                      results.get(s.getKey()).add(s.getValue());
                  }
                  
                  j++;
                  System.out.println("Tested "+j+" out of "+testEntries.size());
              }
              
          }
          
          for (Map.Entry<String, List<Result>> e : results.entrySet()) {
              System.out.println("");
              System.out.println(e.getKey());
              System.out.println(e.getValue().size());
              double precision = 0;
              int precisionCount = 0;
              double recall = 0;
              int recallCount = 0;
              for (Result r : e.getValue()) {
                  if (r.getPrecision() != null) {
                      precision += r.getPrecision();
                      precisionCount++;
                  }
                  if (r.getRecall() != null) {
                      recall += r.getRecall();
                      recallCount++;
                  }
              }
              System.out.println("Precision count "+precisionCount);
              System.out.println("Mean precision "+(precision / precisionCount));
              System.out.println("Recall count "+recallCount);
              System.out.println("Mean recall "+(recall / recallCount));
          }
      }
input: #vulnerable code 
                                  public static void main(String[] args) throws JDOMException, IOException, AnalysisException {
          if (args.length != 3) {
              System.err.println("USAGE: ReferenceParsingEvaluator <foldness> <model_path> <test_path>");
              System.exit(1);
          }
          
          int foldness = Integer.parseInt(args[0]);
          String modelPathSuffix = args[1];
          String testPathSuffix = args[2];
  
          Map<String, List<Result>> results = new HashMap<String, List<Result>>();
          
          for (int i = 0; i < foldness; i++) {
              System.out.println("Fold "+i);
              String modelPath = modelPathSuffix + i;
              CRFBibReferenceParser parser = new CRFBibReferenceParser(modelPath);
              
              String testPath = testPathSuffix + i;
  
              File testFile = new File(testPath);
              List<Citation> testCitations;
          
              InputStream testIS = null;
              try {
                  testIS = new FileInputStream(testFile);
                  InputSource testSource = new InputSource(testIS);
                  testCitations = NlmCitationExtractor.extractCitations(testSource);
              } finally {
                  if (testIS != null) {
                      testIS.close();
                  }
              }
              
              System.out.println(testCitations.size());
              
              List<BibEntry> testEntries = new ArrayList<BibEntry>();
  
              for (Citation c : testCitations) {
                  BibEntry entry = CitationUtils.citationToBibref(c);
                  testEntries.add(entry);
                  for (String key : entry.getFieldKeys()) {
                      if (results.get(key) == null) {
                          results.put(key, new ArrayList<Result>());
                      }
                  }
              }
              
              int j = 0;
              for (BibEntry orig : testEntries) {
                  BibEntry test = parser.parseBibReference(orig.getText());
  
                  System.out.println();
                  System.out.println();
                  System.out.println(orig.toBibTeX());
                  System.out.println(test.toBibTeX());
              
                  Map<String, Result> map = new HashMap<String, Result>();
                  for (String s : orig.getFieldKeys()) {
                      if (map.get(s) == null) {
                          map.put(s, new Result());
                      }
                      map.get(s).addOrig(orig.getAllFieldValues(s).size());
                  }
                  for (String s : test.getFieldKeys()) {
                      if (map.get(s) == null) {
                          map.put(s, new Result());
                      }
                      map.get(s).addExtr(test.getAllFieldValues(s).size());
                  }
                  for (String s : test.getFieldKeys()) {
                      List<String> origVals = orig.getAllFieldValues(s);
                      for (String testVal : test.getAllFieldValues(s)) {
                          boolean found = false;
                          if (origVals.contains(testVal)) {
                              map.get(s).addSuccess();
                              origVals.remove(testVal);
                              found = true;
                          }
                          if (!found) {
                              System.out.println("WRONG "+s);
                          }
                      }
                  }
                  
                  for (Map.Entry<String, Result> s : map.entrySet()) {
                      System.out.println("");
                      System.out.println(s.getKey());
                      System.out.println(s.getValue());
                      System.out.println(s.getValue().getPrecision());
                      System.out.println(s.getValue().getRecall());
                      results.get(s.getKey()).add(s.getValue());
                  }
                  
                  j++;
                  System.out.println("Tested "+j+" out of "+testEntries.size());
              }
              
          }
          
          for (String s : results.keySet()) {
              System.out.println("");
              System.out.println(s);
              System.out.println(results.get(s).size());
              double precision = 0;
              int precisionCount = 0;
              double recall = 0;
              int recallCount = 0;
              for (Result r : results.get(s)) {
                  if (r.getPrecision() != null) {
                      precision += r.getPrecision();
                      precisionCount++;
                  }
                  if (r.getRecall() != null) {
                      recall += r.getRecall();
                      recallCount++;
                  }
              }
              System.out.println("Precision count "+precisionCount);
              System.out.println("Mean precision "+(precision / precisionCount));
              System.out.println("Recall count "+recallCount);
              System.out.println("Mean recall "+(recall / recallCount));
              
          }
      } 
                              #location 103 
                              #vulnerability type NULL_DEREFERENCE