Program: 61502
Project: 61502
Buggy source:
public TestResult execute(String jvmPath,String classpath,List<String> classesToExecute,int waitTime){
  Process p=null;
  jvmPath+=File.separator + "String_Node_Str";
  String systemcp=defineInitialClasspath();
  classpath=systemcp + File.pathSeparator + classpath;
  List<String> cls=new ArrayList<>(classesToExecute);
  try {
    List<String> command=new ArrayList<String>();
    command.add(jvmPath);
    command.add("String_Node_Str");
    command.add("String_Node_Str");
    command.add("String_Node_Str");
    command.add(classpath);
    command.add(classNameToCall());
    command.addAll(cls);
    printCommandToExecute(command);
    ProcessBuilder pb=new ProcessBuilder("String_Node_Str");
    pb.redirectOutput();
    pb.redirectErrorStream(true);
    pb.directory(new File((ConfigurationProperties.getProperty("String_Node_Str"))));
    long t_start=System.currentTimeMillis();
    p=pb.start();
    BufferedWriter p_stdin=new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
    try {
      String timeZone=ConfigurationProperties.getProperty("String_Node_Str");
      p_stdin.write("String_Node_Str" + timeZone + "String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write("String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write("String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write(toString(command));
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write("String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
    }
 catch (    IOException e) {
      log.error(e);
    }
    p.waitFor(waitTime,TimeUnit.MILLISECONDS);
    long t_end=System.currentTimeMillis();
    log.debug("String_Node_Str" + ((t_end - t_start) / 1000) + "String_Node_Str");
    if (!avoidInterruption) {
      log.debug("String_Node_Str");
      p.exitValue();
    }
    TestResult tr=getTestResult(p);
    p.destroy();
    return tr;
  }
 catch (  IOException|InterruptedException|IllegalThreadStateException ex) {
    log.info("String_Node_Str" + ex.getMessage());
    if (p != null)     p.destroy();
  }
  return null;
}

Fixed version (ground truth):
public TestResult execute(String jvmPath,String classpath,List<String> classesToExecute,int waitTime){
  Process p=null;
  jvmPath+=File.separator + "String_Node_Str";
  String systemcp=defineInitialClasspath();
  classpath=systemcp + File.pathSeparator + classpath;
  List<String> cls=new ArrayList<>(classesToExecute);
  try {
    List<String> command=new ArrayList<String>();
    command.add(jvmPath);
    command.add("String_Node_Str");
    command.add("String_Node_Str");
    command.add(classpath);
    command.add(classNameToCall());
    command.addAll(cls);
    printCommandToExecute(command);
    ProcessBuilder pb=new ProcessBuilder("String_Node_Str");
    pb.redirectOutput();
    pb.redirectErrorStream(true);
    pb.directory(new File((ConfigurationProperties.getProperty("String_Node_Str"))));
    long t_start=System.currentTimeMillis();
    p=pb.start();
    BufferedWriter p_stdin=new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
    try {
      String timeZone=ConfigurationProperties.getProperty("String_Node_Str");
      p_stdin.write("String_Node_Str" + timeZone + "String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write("String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write("String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write(toString(command));
      p_stdin.newLine();
      p_stdin.flush();
      p_stdin.write("String_Node_Str");
      p_stdin.newLine();
      p_stdin.flush();
    }
 catch (    IOException e) {
      log.error(e);
    }
    p.waitFor(waitTime,TimeUnit.MILLISECONDS);
    long t_end=System.currentTimeMillis();
    log.debug("String_Node_Str" + ((t_end - t_start) / 1000) + "String_Node_Str");
    if (!avoidInterruption) {
      log.debug("String_Node_Str");
      p.exitValue();
    }
    TestResult tr=getTestResult(p);
    p.destroy();
    return tr;
  }
 catch (  IOException|InterruptedException|IllegalThreadStateException ex) {
    log.info("String_Node_Str" + ex.getMessage());
    if (p != null)     p.destroy();
  }
  return null;
}