Program: 132103
Project: 132103
Buggy source:
/** 
 * delete flows for service function classifier The function returns true if successful. The function returns false if unsuccessful.
 * @param scf service function classifier
 * @return          delete result
 */
public boolean deletedServiceFunctionClassifier(ServiceFunctionClassifier scf){
  if (scf == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  LOG.debug("String_Node_Str",scf.getName(),scf.getAccessList(),scf.getSclServiceFunctionForwarder());
  Acl acl=SfcProviderAclAPI.readAccessList(scf.getAccessList());
  if (acl == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  String aclName=acl.getAclName();
  if (aclName == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  AccessListEntries accessListEntries=acl.getAccessListEntries();
  if (accessListEntries == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  List<Ace> acesList=accessListEntries.getAce();
  if (acesList == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  List<SclServiceFunctionForwarder> sfflist=scf.getSclServiceFunctionForwarder();
  if (sfflist == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  for (  SclServiceFunctionForwarder sclsff : sfflist) {
    for (    Ace ace : acesList) {
      String ruleName=ace.getRuleName();
      if (ruleName == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      Actions actions=ace.getActions();
      if (ruleName == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      Actions1 a1=actions.getAugmentation(Actions1.class);
      if (a1 == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      AclRenderedServicePath path=(AclRenderedServicePath)a1.getSfcAction();
      if (path == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      RspName rspName=new RspName(path.getRenderedServicePath());
      SfcNshHeader nsh=SfcNshHeader.getSfcNshHeader(rspName);
      SffName sffName=new SffName(sclsff.getName());
      ServiceFunctionForwarder sff=SfcProviderServiceForwarderAPI.readServiceFunctionForwarder(sffName);
      if (sff == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      SffOvsBridgeAugmentation ovsSff=sff.getAugmentation(SffOvsBridgeAugmentation.class);
      if (ovsSff == null) {
        LOG.debug("String_Node_Str");
        continue;
      }
      String nodeName=SfcOvsUtil.getOpenFlowNodeIdForSff(sff);
      if (nodeName == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      StringBuffer key=new StringBuffer();
      key.append(scf.getName()).append(aclName).append(ruleName).append("String_Node_Str");
      SfcScfOfUtils.deleteClassifierFlow(nodeName,key.toString());
      RspName reverseRspName=null;
      if (path.getRenderedServicePath().endsWith("String_Node_Str")) {
        reverseRspName=new RspName(path.getRenderedServicePath().replaceFirst("String_Node_Str","String_Node_Str"));
      }
 else {
        reverseRspName=new RspName(path.getRenderedServicePath() + "String_Node_Str");
      }
      SfcNshHeader reverseNsh=SfcNshHeader.getSfcNshHeader(reverseRspName);
      if (reverseNsh == null) {
        LOG.debug("String_Node_Str");
      }
 else {
        key=new StringBuffer();
        key.append(scf.getName()).append(aclName).append(ruleName).append("String_Node_Str");
        if (!SfcScfOfUtils.deleteClassifierFlow(nodeName,key.toString())) {
          LOG.error("String_Node_Str");
        }
        SffName lastSffName=reverseNsh.getSffName();
        if (lastSffName != null && !reverseNsh.getSffName().equals(sffName)) {
          ServiceFunctionForwarder lastSff=SfcProviderServiceForwarderAPI.readServiceFunctionForwarder(lastSffName);
          String lastNodeName=SfcOvsUtil.getOpenFlowNodeIdForSff(lastSff);
          if (lastNodeName == null) {
            LOG.error("String_Node_Str");
          }
 else {
            LOG.debug("String_Node_Str",lastNodeName);
          }
          key=new StringBuffer();
          key.append(scf.getName()).append(aclName).append(ruleName).append("String_Node_Str");
          if (!SfcScfOfUtils.deleteClassifierFlow(lastNodeName,key.toString())) {
            LOG.error("String_Node_Str");
          }
        }
      }
    }
  }
  return true;
}

Fixed version (ground truth):
/** 
 * delete flows for service function classifier The function returns true if successful. The function returns false if unsuccessful.
 * @param scf service function classifier
 * @return          delete result
 */
public boolean deletedServiceFunctionClassifier(ServiceFunctionClassifier scf){
  if (scf == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  LOG.debug("String_Node_Str",scf.getName(),scf.getAccessList(),scf.getSclServiceFunctionForwarder());
  Acl acl=SfcProviderAclAPI.readAccessList(scf.getAccessList());
  if (acl == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  String aclName=acl.getAclName();
  if (aclName == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  AccessListEntries accessListEntries=acl.getAccessListEntries();
  if (accessListEntries == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  List<Ace> acesList=accessListEntries.getAce();
  if (acesList == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  List<SclServiceFunctionForwarder> sfflist=scf.getSclServiceFunctionForwarder();
  if (sfflist == null) {
    LOG.error("String_Node_Str");
    return false;
  }
  for (  SclServiceFunctionForwarder sclsff : sfflist) {
    for (    Ace ace : acesList) {
      String ruleName=ace.getRuleName();
      if (ruleName == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      Actions actions=ace.getActions();
      if (actions == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      Actions1 a1=actions.getAugmentation(Actions1.class);
      if (a1 == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      AclRenderedServicePath path=(AclRenderedServicePath)a1.getSfcAction();
      if (path == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      RspName rspName=new RspName(path.getRenderedServicePath());
      SfcNshHeader nsh=SfcNshHeader.getSfcNshHeader(rspName);
      SffName sffName=new SffName(sclsff.getName());
      ServiceFunctionForwarder sff=SfcProviderServiceForwarderAPI.readServiceFunctionForwarder(sffName);
      if (sff == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      SffOvsBridgeAugmentation ovsSff=sff.getAugmentation(SffOvsBridgeAugmentation.class);
      if (ovsSff == null) {
        LOG.debug("String_Node_Str");
        continue;
      }
      String nodeName=SfcOvsUtil.getOpenFlowNodeIdForSff(sff);
      if (nodeName == null) {
        LOG.error("String_Node_Str");
        continue;
      }
      StringBuffer key=new StringBuffer();
      key.append(scf.getName()).append(aclName).append(ruleName).append("String_Node_Str");
      SfcScfOfUtils.deleteClassifierFlow(nodeName,key.toString());
      RspName reverseRspName=null;
      if (path.getRenderedServicePath().endsWith("String_Node_Str")) {
        reverseRspName=new RspName(path.getRenderedServicePath().replaceFirst("String_Node_Str","String_Node_Str"));
      }
 else {
        reverseRspName=new RspName(path.getRenderedServicePath() + "String_Node_Str");
      }
      SfcNshHeader reverseNsh=SfcNshHeader.getSfcNshHeader(reverseRspName);
      if (reverseNsh == null) {
        LOG.debug("String_Node_Str");
      }
 else {
        key=new StringBuffer();
        key.append(scf.getName()).append(aclName).append(ruleName).append("String_Node_Str");
        if (!SfcScfOfUtils.deleteClassifierFlow(nodeName,key.toString())) {
          LOG.error("String_Node_Str");
        }
        SffName lastSffName=reverseNsh.getSffName();
        if (lastSffName != null && !reverseNsh.getSffName().equals(sffName)) {
          ServiceFunctionForwarder lastSff=SfcProviderServiceForwarderAPI.readServiceFunctionForwarder(lastSffName);
          String lastNodeName=SfcOvsUtil.getOpenFlowNodeIdForSff(lastSff);
          if (lastNodeName == null) {
            LOG.error("String_Node_Str");
          }
 else {
            LOG.debug("String_Node_Str",lastNodeName);
          }
          key=new StringBuffer();
          key.append(scf.getName()).append(aclName).append(ruleName).append("String_Node_Str");
          if (!SfcScfOfUtils.deleteClassifierFlow(lastNodeName,key.toString())) {
            LOG.error("String_Node_Str");
          }
        }
      }
    }
  }
  return true;
}