Program: 60252
Project: 60252
Buggy source:
public static Test suite(){
  TestSuite suite=new TestSuite();
  suite.addTest(MultisetTestSuiteBuilder.using(hashMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.ALLOWS_NULL_VALUES,CollectionFeature.GENERAL_PURPOSE).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(unmodifiableMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.KNOWN_ORDER,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(SortedMultisetTestSuiteBuilder.using(new TestStringMultisetGenerator(){
    @Override protected Multiset<String> create(    String[] elements){
      return TreeMultiset.create(Arrays.asList(elements));
    }
    @Override public List<String> order(    List<String> insertionOrder){
      return Ordering.natural().sortedCopy(insertionOrder);
    }
  }
).withFeatures(CollectionSize.ANY,CollectionFeature.KNOWN_ORDER,CollectionFeature.GENERAL_PURPOSE,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(SortedMultisetTestSuiteBuilder.using(new TestStringMultisetGenerator(){
    @Override protected Multiset<String> create(    String[] elements){
      Multiset<String> result=TreeMultiset.create(Ordering.natural().nullsFirst());
      result.addAll(Arrays.asList(elements));
      return result;
    }
    @Override public List<String> order(    List<String> insertionOrder){
      return Ordering.natural().nullsFirst().sortedCopy(insertionOrder);
    }
  }
).withFeatures(CollectionSize.ANY,CollectionFeature.KNOWN_ORDER,CollectionFeature.GENERAL_PURPOSE,CollectionFeature.ALLOWS_NULL_VALUES).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(forSetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.ALLOWS_NULL_VALUES,CollectionFeature.REMOVE_OPERATIONS).suppressing(getReadsDuplicateInitializingMethods()).suppressing(getSetCountDuplicateInitializingMethods()).suppressing(getIteratorDuplicateInitializingMethods()).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(concurrentMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.GENERAL_PURPOSE,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(enumMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.KNOWN_ORDER,CollectionFeature.GENERAL_PURPOSE,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(intersectionGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.ALLOWS_NULL_VALUES,CollectionFeature.KNOWN_ORDER).named("String_Node_Str").createTestSuite());
  return suite;
}

Fixed version (ground truth):
public static Test suite(){
  TestSuite suite=new TestSuite();
  suite.addTest(MultisetTestSuiteBuilder.using(hashMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.ALLOWS_NULL_VALUES,CollectionFeature.GENERAL_PURPOSE).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(unmodifiableMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.KNOWN_ORDER,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(forSetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.ALLOWS_NULL_VALUES,CollectionFeature.REMOVE_OPERATIONS).suppressing(getReadsDuplicateInitializingMethods()).suppressing(getSetCountDuplicateInitializingMethods()).suppressing(getIteratorDuplicateInitializingMethods()).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(concurrentMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.GENERAL_PURPOSE,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(enumMultisetGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.KNOWN_ORDER,CollectionFeature.GENERAL_PURPOSE,CollectionFeature.ALLOWS_NULL_QUERIES).named("String_Node_Str").createTestSuite());
  suite.addTest(MultisetTestSuiteBuilder.using(intersectionGenerator()).withFeatures(CollectionSize.ANY,CollectionFeature.ALLOWS_NULL_VALUES,CollectionFeature.KNOWN_ORDER).named("String_Node_Str").createTestSuite());
  return suite;
}