Program: 9990
Project: 9990
Buggy source:
@Override public void mouseClicked(MouseEvent arg0){
  if (panel.getEvaluateddescription() != null) {
    if (arg0.getX() >= panel.getX1() + panel.getShiftCovered() && arg0.getX() <= panel.getX2() + panel.getShiftCovered() && arg0.getY() >= panel.getY1() && arg0.getY() <= panel.getY2()) {
      individualComboBox.clear();
      Set<Individual> covInd=((EvaluatedDescriptionClass)description).getCoveredInstances();
      for (      Individual ind : covInd) {
        individualComboBox.add(ind.toString());
      }
      indiBox=new JComboBox(individualComboBox);
      scrollPopup=new BasicComboPopup(indiBox);
      scrollPopup.setAutoscrolls(true);
      scrollPopup.show(panel,arg0.getX(),arg0.getY());
    }
    if (arg0.getX() >= panel.getX1() + panel.getShiftNewConcept() && arg0.getX() <= panel.getX2() + panel.getShiftNewConcept() && arg0.getY() >= panel.getY1() && arg0.getY() <= panel.getY2() || arg0.getX() >= panel.getX1() + panel.getShiftNewConceptX() && arg0.getX() <= panel.getX2() + panel.getShiftNewConceptX() && arg0.getY() >= panel.getY1() + panel.getShiftNewConcept() && arg0.getY() <= panel.getY2() + panel.getShiftNewConcept()) {
      individualComboBox.clear();
      Set<Individual> addInd=((EvaluatedDescriptionClass)description).getAdditionalInstances();
      for (      Individual ind : addInd) {
        individualComboBox.add(ind.toString());
      }
      indiBox=new JComboBox(individualComboBox);
      scrollPopup=new BasicComboPopup(indiBox);
      scrollPopup.setAutoscrolls(true);
      scrollPopup.show(panel,arg0.getX(),arg0.getY());
    }
    if (arg0.getX() >= panel.getX1() - panel.getShiftOldConcept() && arg0.getX() <= panel.getX2() - panel.getShiftOldConcept() && arg0.getY() >= panel.getY1() && arg0.getY() <= panel.getY2()) {
      individualComboBox.clear();
      Set<Individual> notCovInd=model.getReasoner().getIndividuals(model.getCurrentConcept());
      notCovInd.removeAll(((EvaluatedDescriptionClass)description).getCoveredInstances());
      for (      Individual ind : notCovInd) {
        individualComboBox.add(ind.toString());
      }
      indiBox=new JComboBox(individualComboBox);
      scrollPopup=new BasicComboPopup(indiBox);
      scrollPopup.setAutoscrolls(true);
      scrollPopup.show(panel,arg0.getX(),arg0.getY());
    }
  }
}

Fixed version (ground truth):
@Override public void mouseClicked(MouseEvent arg0){
  if (panel.getEvaluateddescription() != null) {
    if (arg0.getX() >= panel.getX1() + panel.getShiftCovered() && arg0.getX() <= panel.getX2() + panel.getShiftCovered() && arg0.getY() >= panel.getY1() && arg0.getY() <= panel.getY2()) {
      individualComboBox.clear();
      Set<Individual> covInd=((EvaluatedDescriptionClass)description).getCoveredInstances();
      int i=covInd.size();
      if (i > 0) {
        for (        Individual ind : covInd) {
          individualComboBox.add(ind.toString());
        }
        indiBox=new JComboBox(individualComboBox);
        scrollPopup=new BasicComboPopup(indiBox);
        scrollPopup.setAutoscrolls(true);
        scrollPopup.show(panel,arg0.getX(),arg0.getY());
      }
    }
    if (arg0.getX() >= panel.getX1() + panel.getShiftNewConcept() && arg0.getX() <= panel.getX2() + panel.getShiftNewConcept() && arg0.getY() >= panel.getY1() && arg0.getY() <= panel.getY2() || arg0.getX() >= panel.getX1() + panel.getShiftNewConceptX() && arg0.getX() <= panel.getX2() + panel.getShiftNewConceptX() && arg0.getY() >= panel.getY1() + panel.getShiftNewConcept() && arg0.getY() <= panel.getY2() + panel.getShiftNewConcept()) {
      individualComboBox.clear();
      Set<Individual> addInd=((EvaluatedDescriptionClass)description).getAdditionalInstances();
      int i=addInd.size();
      if (i > 0) {
        for (        Individual ind : addInd) {
          individualComboBox.add(ind.toString());
        }
        indiBox=new JComboBox(individualComboBox);
        scrollPopup=new BasicComboPopup(indiBox);
        scrollPopup.setAutoscrolls(true);
        scrollPopup.show(panel,arg0.getX(),arg0.getY());
      }
    }
    if (arg0.getX() >= panel.getX1() - panel.getShiftOldConcept() && arg0.getX() <= panel.getX2() - panel.getShiftOldConcept() && arg0.getY() >= panel.getY1() && arg0.getY() <= panel.getY2()) {
      individualComboBox.clear();
      Set<Individual> notCovInd=model.getReasoner().getIndividuals(model.getCurrentConcept());
      notCovInd.removeAll(((EvaluatedDescriptionClass)description).getCoveredInstances());
      int i=notCovInd.size();
      if (i > 0) {
        for (        Individual ind : notCovInd) {
          individualComboBox.add(ind.toString());
        }
        indiBox=new JComboBox(individualComboBox);
        scrollPopup=new BasicComboPopup(indiBox);
        scrollPopup.setAutoscrolls(true);
        scrollPopup.show(panel,arg0.getX(),arg0.getY());
      }
    }
  }
}