Program: 96723
Project: 96723
Buggy source:
/** 
 * create a relation change item who's artifact and other attributes and relations need to be introduced
 */
private static Object[] testCase_missingRelation(){
  List<ChangeItem> changes=new LinkedList<>();
  final int ci1AttrId=22;
  final long missingGamma=9L;
  long artGamma=7L;
  RelationId relId=RelationId.valueOf(6);
  int artA=65;
  int artB=2;
  GammaId srcGamma=GammaId.valueOf(7L);
  HashMap<Long,ApplicabilityToken> applicMap=new HashMap<>();
  applicMap.put(1L,ApplicabilityToken.BASE);
  ChangeItem ci1=ChangeItemUtil.newRelationChange(relId,RelationTypeId.valueOf(0),srcGamma,ModificationType.NEW,ArtifactId.valueOf(artA),ArtifactId.valueOf(artB),"String_Node_Str",ApplicabilityToken.BASE);
  changes.add(ci1);
  List<AttributeData> attrDatas=new LinkedList<>();
  AttributeData attrData1=createAttributeData(artA,ci1AttrId,1L,ModificationType.MODIFIED);
  AttributeData attrData2=createAttributeData(artA,ci1AttrId + 1,missingGamma,ModificationType.INTRODUCED);
  attrDatas.add(attrData1);
  attrDatas.add(attrData2);
  List<ArtifactData> artData=new LinkedList<>();
  ArtifactData artData1=createArtifactData(artA,artGamma,ModificationType.NEW);
  artData.add(artData1);
  List<RelationData> relDatas=new LinkedList<>();
  RelationData relData1=createRelationData(11,artA,artB + 1,88,ModificationType.NEW);
  relDatas.add(relData1);
  List<ArtifactData> destArtData=new LinkedList<>();
  ArtifactData destArt=createArtifactData(artB + 1,99,ModificationType.NEW);
  destArtData.add(destArt);
  List<ChangeItem> expected=new LinkedList<>();
  expected.add(createExpected(attrData1));
  expected.add(createExpected(attrData2));
  expected.add(createExpected(artData1));
  expected.add(createExpected(relData1));
  return new Object[]{changes,expected,attrDatas,artData,relDatas,destArtData,applicMap};
}

Fixed version (ground truth):
/** 
 * create a relation change item who's artifact and other attributes and relations need to be introduced
 */
private static Object[] testCase_missingRelation(){
  List<ChangeItem> changes=new LinkedList<>();
  final int ci1AttrId=22;
  final long missingGamma=9L;
  long artGamma=7L;
  RelationId relId=RelationId.valueOf(6L);
  int artA=65;
  int artB=2;
  GammaId srcGamma=GammaId.valueOf(7L);
  HashMap<Long,ApplicabilityToken> applicMap=new HashMap<>();
  applicMap.put(1L,ApplicabilityToken.BASE);
  ChangeItem ci1=ChangeItemUtil.newRelationChange(relId,RelationTypeId.SENTINEL,srcGamma,ModificationType.NEW,ArtifactId.valueOf(artA),ArtifactId.valueOf(artB),"String_Node_Str",ApplicabilityToken.BASE);
  changes.add(ci1);
  List<AttributeData> attrDatas=new LinkedList<>();
  AttributeData attrData1=createAttributeData(artA,ci1AttrId,1L,ModificationType.MODIFIED);
  AttributeData attrData2=createAttributeData(artA,ci1AttrId + 1,missingGamma,ModificationType.INTRODUCED);
  attrDatas.add(attrData1);
  attrDatas.add(attrData2);
  List<ArtifactData> artData=new LinkedList<>();
  ArtifactData artData1=createArtifactData(artA,artGamma,ModificationType.NEW);
  artData.add(artData1);
  List<RelationData> relDatas=new LinkedList<>();
  RelationData relData1=createRelationData(11,artA,artB + 1,88,ModificationType.NEW);
  relDatas.add(relData1);
  List<ArtifactData> destArtData=new LinkedList<>();
  ArtifactData destArt=createArtifactData(artB + 1,99,ModificationType.NEW);
  destArtData.add(destArt);
  List<ChangeItem> expected=new LinkedList<>();
  expected.add(createExpected(attrData1));
  expected.add(createExpected(attrData2));
  expected.add(createExpected(artData1));
  expected.add(createExpected(relData1));
  return new Object[]{changes,expected,attrDatas,artData,relDatas,destArtData,applicMap};
}