Program: 39027
Project: 39027
Buggy source:
@Override public Server provision(Base base) throws UnableToProvisionServerException {
  logger.debug("String_Node_Str",base.getName());
synchronized (this) {
    if (!dhcp_done) {
      DoRuntime.exec("String_Node_Str","String_Node_Str","String_Node_Str",this.hostonlyif_name,"String_Node_Str","String_Node_Str");
      DoRuntime.exec("String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str",this.hostonlyif_name,"String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str");
      dhcp_done=true;
    }
  }
  String res;
synchronized (this) {
    res=DoRuntime.exec("String_Node_Str","String_Node_Str",base.getAttributes().get("String_Node_Str"));
    logger.trace("String_Node_Str" + res);
  }
  Pattern p=Pattern.compile("String_Node_Str");
  Matcher m=p.matcher(res);
  if (m.find())   this.vmname=m.group(1);
  logger.info("String_Node_Str",this.vmname);
  this.sshport=this.port_start + portCounter.getAndIncrement();
  logger.info("String_Node_Str",this.sshport);
  logger.trace(DoRuntime.exec("String_Node_Str","String_Node_Str",this.vmname,"String_Node_Str" + VBoxProvisioner.NET_HOSTONLY_ADAPTER,this.hostonlyif_name,"String_Node_Str" + VBoxProvisioner.NET_BRIDGED_ADAPTER,this.bridgedif_name));
  logger.trace(DoRuntime.exec("String_Node_Str","String_Node_Str",this.vmname,"String_Node_Str" + VBoxProvisioner.NET_NAT,"String_Node_Str" + sshport + "String_Node_Str"));
  logger.trace(DoRuntime.exec("String_Node_Str","String_Node_Str",this.vmname));
  String public_key;
  try {
    FileReader input=null;
    input=new FileReader(this.pub_key_file);
    BufferedReader bufRead=new BufferedReader(input);
    String line;
    StringBuilder sb=new StringBuilder();
    String newLine="String_Node_Str";
    while ((line=bufRead.readLine()) != null) {
      sb.append(line).append(newLine);
    }
    public_key=sb.toString();
    logger.info("String_Node_Str");
    logger.trace("String_Node_Str",public_key);
  }
 catch (  Exception e) {
    throw new UnableToProvisionServerException("String_Node_Str" + e.toString());
  }
  try {
    logger.info("String_Node_Str",VBoxProvisioner.BOOTUP_TIME);
    Thread.sleep(VBoxProvisioner.BOOTUP_TIME * 1000);
  }
 catch (  InterruptedException e) {
    throw new UnableToProvisionServerException("String_Node_Str" + e.toString());
  }
  logger.info("String_Node_Str");
  SSH ssh=null;
  String ifconfig="String_Node_Str";
  try {
    logger.info("String_Node_Str");
    ssh=new SSH(this.password,this.username,"String_Node_Str",sshport);
    logger.info("String_Node_Str",sshport);
    ssh.exec("String_Node_Str" + public_key + "String_Node_Str");
    ifconfig=ssh.exec("String_Node_Str");
    logger.trace("String_Node_Str" + ifconfig);
    ssh.close();
  }
 catch (  IOException e) {
    throw new UnableToProvisionServerException("String_Node_Str" + e.toString());
  }
  String internalIp=null, externalIp=null;
  String[] sections=ifconfig.split("String_Node_Str");
  Pattern pat_ip=Pattern.compile("String_Node_Str",Pattern.MULTILINE | Pattern.DOTALL);
  for (  String section : sections) {
    Matcher m_ip=pat_ip.matcher(section);
    if (m_ip.find()) {
      String ethX=m_ip.group(1);
      if (ethX.equals("String_Node_Str" + (VBoxProvisioner.NET_HOSTONLY_ADAPTER - 1))) {
        internalIp=m_ip.group(2);
      }
 else       if (ethX.equals("String_Node_Str" + (VBoxProvisioner.NET_BRIDGED_ADAPTER - 1))) {
        externalIp=m_ip.group(2);
      }
    }
  }
  if (internalIp == null || externalIp == null) {
    throw new UnableToProvisionServerException("String_Node_Str");
  }
 else {
    logger.info("String_Node_Str",internalIp);
    logger.info("String_Node_Str",externalIp);
  }
  return new VBoxServer(base,this.vmname,internalIp,externalIp,sshport);
}

Fixed version (ground truth):
@Override public Server provision(Base base) throws UnableToProvisionServerException {
  String vmname=null;
  int sshport;
  logger.debug("String_Node_Str",base.getName());
  String res;
synchronized (this) {
    res=DoRuntime.exec("String_Node_Str","String_Node_Str",base.getAttributes().get("String_Node_Str"));
    logger.trace("String_Node_Str" + res);
  }
  Pattern p=Pattern.compile("String_Node_Str");
  Matcher m=p.matcher(res);
  if (m.find())   vmname=m.group(1);
  logger.info("String_Node_Str",vmname);
  sshport=this.port_start + portCounter.getAndIncrement();
  logger.info("String_Node_Str",sshport);
  logger.trace(DoRuntime.exec("String_Node_Str","String_Node_Str",vmname,"String_Node_Str" + VBoxProvisioner.NET_HOSTONLY_ADAPTER,this.hostonlyif_name,"String_Node_Str" + VBoxProvisioner.NET_BRIDGED_ADAPTER,this.bridgedif_name));
  logger.trace(DoRuntime.exec("String_Node_Str","String_Node_Str",vmname,"String_Node_Str" + VBoxProvisioner.NET_NAT,"String_Node_Str" + sshport + "String_Node_Str"));
  logger.trace(DoRuntime.exec("String_Node_Str","String_Node_Str",vmname));
  try {
    logger.info("String_Node_Str",VBoxProvisioner.BOOTUP_TIME);
    Thread.sleep(VBoxProvisioner.BOOTUP_TIME * 1000);
  }
 catch (  InterruptedException e) {
    throw new UnableToProvisionServerException("String_Node_Str" + e.toString());
  }
  logger.info("String_Node_Str");
  SSH ssh=null;
  String ifconfig="String_Node_Str";
  try {
    logger.info("String_Node_Str");
    ssh=new SSH(this.password,this.username,"String_Node_Str",sshport);
    logger.info("String_Node_Str",sshport);
    ssh.exec("String_Node_Str" + public_key + "String_Node_Str");
    ssh.exec("String_Node_Str" + (NET_BRIDGED_ADAPTER - 1));
    ifconfig=ssh.exec("String_Node_Str");
    logger.trace("String_Node_Str" + ifconfig);
    String hostcheck="String_Node_Str";
    String ping=ssh.exec("String_Node_Str" + hostcheck);
    if (!ping.toLowerCase().contains("String_Node_Str")) {
      throw new UnableToProvisionServerException("String_Node_Str" + hostcheck + "String_Node_Str"+ ping);
    }
    ssh.close();
  }
 catch (  IOException e) {
    throw new UnableToProvisionServerException("String_Node_Str" + e.toString());
  }
  String internalIp=null, externalIp=null;
  String[] sections=ifconfig.split("String_Node_Str");
  Pattern pat_ip=Pattern.compile("String_Node_Str",Pattern.MULTILINE | Pattern.DOTALL);
  for (  String section : sections) {
    Matcher m_ip=pat_ip.matcher(section);
    if (m_ip.find()) {
      String ethX=m_ip.group(1);
      if (ethX.equals("String_Node_Str" + (VBoxProvisioner.NET_HOSTONLY_ADAPTER - 1))) {
        internalIp=m_ip.group(2);
      }
 else       if (ethX.equals("String_Node_Str" + (VBoxProvisioner.NET_BRIDGED_ADAPTER - 1))) {
        externalIp=m_ip.group(2);
      }
    }
  }
  if (internalIp == null || externalIp == null) {
    throw new UnableToProvisionServerException("String_Node_Str");
  }
 else {
    logger.info("String_Node_Str",internalIp);
    logger.info("String_Node_Str",externalIp);
  }
  return new VBoxServer(base,vmname,internalIp,externalIp,sshport);
}