Program: 4293
Project: 4293
Buggy source:
/** 
 * If date is not match, will return previous closest match. If date is match, will return this date.
 * @param date - reference DateTime instance - never null;
 * @return DateTime instance, never null. Value obeys logic specified above.
 * @throws NoSuchValueException
 */
DateTime previousClosestMatch(DateTime date) throws NoSuchValueException {
  List<Integer> year=yearsValueGenerator.generateCandidates(date.getYear(),date.getYear());
  TimeNode days=generateDays(cronDefinition,date);
  int highestMonth=months.getValues().get(months.getValues().size() - 1);
  int highestDay=days.getValues().get(days.getValues().size() - 1);
  int highestHour=hours.getValues().get(hours.getValues().size() - 1);
  int highestMinute=minutes.getValues().get(minutes.getValues().size() - 1);
  int highestSecond=seconds.getValues().get(seconds.getValues().size() - 1);
  NearestValue nearestValue;
  DateTime newDate;
  if (year.isEmpty()) {
    return initDateTime(yearsValueGenerator.generatePreviousValue(date.getYear()),highestMonth,highestDay,highestHour,highestMinute,highestSecond);
  }
  if (!months.getValues().contains(date.getMonthOfYear())) {
    nearestValue=months.getPreviousValue(date.getMonthOfYear(),0);
    int previousMonths=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),12,31,23,59,59).minusYears(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),previousMonths,highestDay,highestHour,highestMinute,highestSecond);
  }
  if (!days.getValues().contains(date.getDayOfMonth())) {
    nearestValue=days.getPreviousValue(date.getDayOfMonth(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),1,23,59,59).minusMonths(nearestValue.getShifts()).dayOfMonth().withMaximumValue();
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),nearestValue.getValue(),highestHour,highestMinute,highestSecond);
  }
  if (!hours.getValues().contains(date.getHourOfDay())) {
    nearestValue=hours.getPreviousValue(date.getHourOfDay(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),23,59,59).minusDays(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),nearestValue.getValue(),highestMinute,highestSecond);
  }
  if (!minutes.getValues().contains(date.getMinuteOfHour())) {
    nearestValue=minutes.getPreviousValue(date.getMinuteOfHour(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),59,59).minusHours(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),nearestValue.getValue(),highestSecond);
  }
  if (!seconds.getValues().contains(date.getSecondOfMinute())) {
    nearestValue=seconds.getPreviousValue(date.getSecondOfMinute(),0);
    int previousSeconds=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),date.getMinuteOfHour(),59).minusMinutes(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),date.getMinuteOfHour(),previousSeconds);
  }
  return date;
}

Fixed version (ground truth):
/** 
 * If date is not match, will return previous closest match. If date is match, will return this date.
 * @param date - reference DateTime instance - never null;
 * @return DateTime instance, never null. Value obeys logic specified above.
 * @throws NoSuchValueException
 */
DateTime previousClosestMatch(DateTime date) throws NoSuchValueException {
  List<Integer> year=yearsValueGenerator.generateCandidates(date.getYear(),date.getYear());
  TimeNode days=generateDays(cronDefinition,date);
  int highestMonth=months.getValues().get(months.getValues().size() - 1);
  int highestDay=days.getValues().get(days.getValues().size() - 1);
  int highestHour=hours.getValues().get(hours.getValues().size() - 1);
  int highestMinute=minutes.getValues().get(minutes.getValues().size() - 1);
  int highestSecond=seconds.getValues().get(seconds.getValues().size() - 1);
  NearestValue nearestValue;
  DateTime newDate;
  if (year.isEmpty()) {
    return initDateTime(yearsValueGenerator.generatePreviousValue(date.getYear()),highestMonth,highestDay,highestHour,highestMinute,highestSecond,date.getZone());
  }
  if (!months.getValues().contains(date.getMonthOfYear())) {
    nearestValue=months.getPreviousValue(date.getMonthOfYear(),0);
    int previousMonths=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),12,31,23,59,59).minusYears(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),previousMonths,highestDay,highestHour,highestMinute,highestSecond,date.getZone());
  }
  if (!days.getValues().contains(date.getDayOfMonth())) {
    nearestValue=days.getPreviousValue(date.getDayOfMonth(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),1,23,59,59).minusMonths(nearestValue.getShifts()).dayOfMonth().withMaximumValue();
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),nearestValue.getValue(),highestHour,highestMinute,highestSecond,date.getZone());
  }
  if (!hours.getValues().contains(date.getHourOfDay())) {
    nearestValue=hours.getPreviousValue(date.getHourOfDay(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),23,59,59).minusDays(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),nearestValue.getValue(),highestMinute,highestSecond,date.getZone());
  }
  if (!minutes.getValues().contains(date.getMinuteOfHour())) {
    nearestValue=minutes.getPreviousValue(date.getMinuteOfHour(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),59,59).minusHours(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),nearestValue.getValue(),highestSecond,date.getZone());
  }
  if (!seconds.getValues().contains(date.getSecondOfMinute())) {
    nearestValue=seconds.getPreviousValue(date.getSecondOfMinute(),0);
    int previousSeconds=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=new DateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),date.getMinuteOfHour(),59).minusMinutes(nearestValue.getShifts());
      return previousClosestMatch(newDate);
    }
    return initDateTime(date.getYear(),date.getMonthOfYear(),date.getDayOfMonth(),date.getHourOfDay(),date.getMinuteOfHour(),previousSeconds,date.getZone());
  }
  return date;
}