Program: 143875
Project: 143875
Buggy source:
/** 
 * Copies a file to a new location. <p> This method copies the contents of the specified source file to the specified destination file. The directory holding the destination file is created if it does not exist. If the destination file exists, then this method will overwrite it.
 * @param srcFile  an existing file to copy, must not be null
 * @param destFile  the new file, must not be null
 * @param preserveFileDate  true if the file date of the copyshould be the same as the original
 * @throws NullPointerException if source or destination is null
 * @throws IOException if source or destination is invalid
 * @throws IOException if an IO error occurs during copying
 * @see #copyFileToDirectory
 */
public static void copyFile(File srcFile,File destFile,boolean preserveFileDate) throws IOException {
  if (srcFile == null) {
    throw new NullPointerException("String_Node_Str");
  }
  if (destFile == null) {
    throw new NullPointerException("String_Node_Str");
  }
  if (srcFile.exists() == false) {
    throw new FileNotFoundException("String_Node_Str" + srcFile + "String_Node_Str");
  }
  if (srcFile.isDirectory()) {
    throw new IOException("String_Node_Str" + srcFile + "String_Node_Str");
  }
  if (srcFile.getCanonicalPath().equals(destFile.getCanonicalPath())) {
    throw new IOException("String_Node_Str" + srcFile + "String_Node_Str"+ destFile+ "String_Node_Str");
  }
  if (destFile.getParentFile() != null && destFile.getParentFile().exists() == false) {
    if (destFile.getParentFile().mkdirs() == false) {
      throw new IOException("String_Node_Str" + destFile + "String_Node_Str");
    }
  }
  if (destFile.exists() && destFile.canWrite() == false) {
    throw new IOException("String_Node_Str" + destFile + "String_Node_Str");
  }
  doCopyFile(srcFile,destFile,preserveFileDate);
}

Fixed version (ground truth):
/** 
 * Copies a file to a new location. <p> This method copies the contents of the specified source file to the specified destination file. The directory holding the destination file is created if it does not exist. If the destination file exists, then this method will overwrite it.
 * @param srcFile  an existing file to copy, must not be null
 * @param destFile  the new file, must not be null
 * @param preserveFileDate  true if the file date of the copyshould be the same as the original
 * @throws NullPointerException if source or destination is null
 * @throws IOException if source or destination is invalid
 * @throws IOException if an IO error occurs during copying
 * @see #copyFileToDirectory
 */
public static void copyFile(File srcFile,File destFile,boolean preserveFileDate) throws IOException {
  if (srcFile == null) {
    throw new NullPointerException("String_Node_Str");
  }
  if (destFile == null) {
    throw new NullPointerException("String_Node_Str");
  }
  if (!srcFile.exists()) {
    throw new FileNotFoundException("String_Node_Str" + srcFile + "String_Node_Str");
  }
  if (srcFile.isDirectory()) {
    throw new IOException("String_Node_Str" + srcFile + "String_Node_Str");
  }
  if (srcFile.getCanonicalPath().equals(destFile.getCanonicalPath())) {
    throw new IOException("String_Node_Str" + srcFile + "String_Node_Str"+ destFile+ "String_Node_Str");
  }
  if (destFile.getParentFile() != null && !destFile.getParentFile().exists() && !destFile.getParentFile().mkdirs()) {
    throw new IOException("String_Node_Str" + destFile + "String_Node_Str");
  }
  if (destFile.exists() && !destFile.canWrite()) {
    throw new IOException("String_Node_Str" + destFile + "String_Node_Str");
  }
  doCopyFile(srcFile,destFile,preserveFileDate);
}