}
        };
    List<Callable<?>> allTasks = new ArrayList<>();
    allTasks.add(completeSuccessfullyRunnable);
    allTasks.add(completeExceptionallyRunnable);
    allTasks.add(cancelRunnable);
    allTasks.add(setFutureCompleteSuccessfullyRunnable);
    allTasks.add(setFutureCompleteExceptionallyRunnable);
    allTasks.add(setFutureCancelRunnable);
    for (int k = 0; k < 50; k++) {