Program: 123693
Project: 123693
Buggy source:
private void createInputLoopTable(OutputTreeNode targetOutputNode,OutputTreeNodeEditPart treeNodeEditPart){
  OutputTreeNodeEditPart outputTreeNodeEditPart=null;
  if (treeNodeEditPart instanceof OutputTreeNodeEditPart) {
    outputTreeNodeEditPart=XmlMapUtil.getParentLoopNodeEditPart(treeNodeEditPart);
  }
  if (loopParentTreeNode != null) {
    InputLoopNodesTable inputLoopNodesTable=null;
    AbstractInOutTree abstractTree=XmlMapUtil.getAbstractInOutTree(targetOutputNode);
    if (abstractTree != null && abstractTree instanceof OutputXmlTree) {
      listInputLoopNodesTablesEntry=((OutputXmlTree)abstractTree).getInputLoopNodesTables();
      if (!XmlMapUtil.hasDocument(abstractTree)) {
        if (listInputLoopNodesTablesEntry != null && listInputLoopNodesTablesEntry.size() == 0) {
          inputLoopNodesTable=XmlmapFactory.eINSTANCE.createInputLoopNodesTable();
          inputLoopNodesTable.getInputloopnodes().add(loopParentTreeNode);
          listInputLoopNodesTablesEntry.add(inputLoopNodesTable);
        }
 else         if (listInputLoopNodesTablesEntry != null && listInputLoopNodesTablesEntry.size() == 1) {
          inputLoopNodesTable=listInputLoopNodesTablesEntry.get(0);
          boolean isContain=false;
          for (          TreeNode treeNode : inputLoopNodesTable.getInputloopnodes()) {
            if (treeNode.getXpath().equals(loopParentTreeNode.getXpath())) {
              isContain=true;
            }
          }
          if (!isContain) {
            inputLoopNodesTable.getInputloopnodes().add(loopParentTreeNode);
          }
        }
      }
 else {
        OutputTreeNode loopParentOutputTreeNode=(OutputTreeNode)XmlMapUtil.getLoopParentNode(targetOutputNode);
        if (loopParentOutputTreeNode != null) {
          if (loopParentOutputTreeNode.getInputLoopNodesTable() == null) {
            inputLoopNodesTable=XmlmapFactory.eINSTANCE.createInputLoopNodesTable();
            if (outputTreeNodeEditPart != null) {
              inputLoopNodesTable.eAdapters().add(outputTreeNodeEditPart);
            }
            inputLoopNodesTable.getInputloopnodes().add(loopParentTreeNode);
            loopParentOutputTreeNode.setInputLoopNodesTable(inputLoopNodesTable);
            listInputLoopNodesTablesEntry.add(inputLoopNodesTable);
          }
 else {
            if (outputTreeNodeEditPart != null) {
              loopParentOutputTreeNode.getInputLoopNodesTable().eAdapters().add(outputTreeNodeEditPart);
            }
            loopParentOutputTreeNode.getInputLoopNodesTable().getInputloopnodes().add(loopParentTreeNode);
          }
        }
      }
    }
  }
}

Fixed version (ground truth):
private void createInputLoopTable(TreeNode sourceNode,OutputTreeNode targetOutputNode){
  TreeNode loopParentTreeNode=XmlMapUtil.getLoopParentNode((TreeNode)sourceNode);
  InputLoopNodesTable inputLoopNodesTable=null;
  AbstractInOutTree abstractTree=XmlMapUtil.getAbstractInOutTree(targetOutputNode);
  if (abstractTree != null && abstractTree instanceof OutputXmlTree) {
    List<InputLoopNodesTable> listInputLoopNodesTablesEntry=((OutputXmlTree)abstractTree).getInputLoopNodesTables();
    if (!XmlMapUtil.hasDocument(abstractTree)) {
      if (listInputLoopNodesTablesEntry != null && listInputLoopNodesTablesEntry.size() == 0) {
        inputLoopNodesTable=XmlmapFactory.eINSTANCE.createInputLoopNodesTable();
        listInputLoopNodesTablesEntry.add(inputLoopNodesTable);
      }
 else       if (listInputLoopNodesTablesEntry != null && listInputLoopNodesTablesEntry.size() == 1) {
        inputLoopNodesTable=listInputLoopNodesTablesEntry.get(0);
      }
    }
 else {
      OutputTreeNode loopParentOutputTreeNode=(OutputTreeNode)XmlMapUtil.getLoopParentNode(targetOutputNode);
      if (loopParentOutputTreeNode != null) {
        inputLoopNodesTable=loopParentOutputTreeNode.getInputLoopNodesTable();
        if (inputLoopNodesTable == null) {
          inputLoopNodesTable=XmlmapFactory.eINSTANCE.createInputLoopNodesTable();
          loopParentOutputTreeNode.setInputLoopNodesTable(inputLoopNodesTable);
          listInputLoopNodesTablesEntry.add(inputLoopNodesTable);
        }
      }
    }
    if (inputLoopNodesTable == null) {
      return;
    }
    List<TreeNode> soruceLoops=new ArrayList<TreeNode>();
    if (loopParentTreeNode != null) {
      soruceLoops.add(loopParentTreeNode);
    }
    if (loopParentTreeNode == null) {
      InputXmlTree inputTree=(InputXmlTree)XmlMapUtil.getAbstractInOutTree(sourceNode);
      if (inputTree != null) {
        if (!inputTree.isLookup() && inputLoopNodesTable.getInputloopnodes().isEmpty()) {
          loopParentTreeNode=XmlMapUtil.getFirstLoopOfATree(inputTree);
          if (loopParentTreeNode != null) {
            soruceLoops.add(loopParentTreeNode);
          }
        }
 else {
          inputTree=null;
          for (          InputXmlTree input : xmlMapData.getInputTrees()) {
            if (!input.isLookup()) {
              inputTree=input;
              break;
            }
          }
          if (inputTree != null) {
            EList<LookupConnection> lookupIncomingConnections=sourceNode.getLookupIncomingConnections();
            boolean atLeastOneLookupFromMain=false;
            for (            LookupConnection lookupConn : lookupIncomingConnections) {
              TreeNode sourceTreeNode=(TreeNode)lookupConn.getSource();
              AbstractInOutTree sourceTree=XmlMapUtil.getAbstractInOutTree(sourceTreeNode);
              if (sourceTree == inputTree) {
                atLeastOneLookupFromMain=true;
                loopParentTreeNode=XmlMapUtil.getLoopParentNode(sourceTreeNode);
                if (loopParentTreeNode != null && !soruceLoops.contains(loopParentTreeNode)) {
                  soruceLoops.add(loopParentTreeNode);
                }
              }
            }
            if (soruceLoops.isEmpty() && atLeastOneLookupFromMain) {
              loopParentTreeNode=XmlMapUtil.getFirstLoopOfATree(inputTree);
              if (loopParentTreeNode != null) {
                soruceLoops.add(loopParentTreeNode);
              }
            }
          }
        }
      }
    }
    for (    TreeNode sourceLoop : soruceLoops) {
      if (!inputLoopNodesTable.getInputloopnodes().contains(sourceLoop)) {
        inputLoopNodesTable.getInputloopnodes().add(sourceLoop);
      }
    }
  }
}