When I run demo , when successNum coming my process can not exit immediately

[minhuicn]

public static void main(String[] args) {
Retryer retryer = RetryerBuilder.newBuilder()
.retryIfException()
.retryIfResult(aBoolean -> Objects.equals(aBoolean, false))
.withWaitStrategy(WaitStrategies.fixedWait(1, TimeUnit.SECONDS))
.withStopStrategy(StopStrategies.stopAfterAttempt(20))
.withRetryListener(new RetryLogListener())
.withAttemptTimeLimiter(AttemptTimeLimiters.fixedTimeLimit(5, TimeUnit.SECONDS))
.build();
Callable callable = buildCallable(3, 10);
Boolean result = retryer.call(callable);
System.out.println("result = " + result);
}

public static final Callable<Boolean> buildCallable(int successNum, int maxCount) {
    Callable<Boolean> callable = new Callable<Boolean>() {
        int times = 0;

        @Override
        public Boolean call() throws Exception {
            times++;
            log.info("call times={}", times);
            if (successNum == times || times == maxCount) {
                return true;
            }
            if (times == 1) {
                throw new NullPointerException();
            } else if (times == 2) {
                throw new Exception();
            } else if (times == 3) {
                throw new RuntimeException();
            } else if (times == 4) {
                return false;
            } else {
                return false;
            }
        }
    };
    return callable;
}

where is wrong ?