@Override
		public void run() {
			while (true) {
				if (shutdown) {
					if (this.id % 10 == 0) // every 10th thread
						logger.info("Thread #" + this.id + " increased the counter " + this.sum + "-times");
					else
						logger.info("Thread #" + this.id + " summed up to " + this.sum);
					return;
				}
				if (start) {
					if (this.id % 10 == 0) { // every 10th thread
						increaseCounter();
						this.sum++;
					} else {
						this.sum += getCounter();
					}
				}
			}
		}