while(iter.hasNext()) {
String source = iter.next();
long hwm = _clock.getHWMScn(source) + _rand.nextInt(100) + 1;
_clock.updateHWMark(source, hwm);
assertTrue(_clock.getLWMScn(source) < _clock.getHWMScn(source));
assertTrue(clock.before(_clock.current()));
clock = _clock.current();
}
assertTrue(clock.compareTo(_clock.current()) == Occurred.EQUICONCURRENTLY);