Timeout crash custom IO times examples for 32-point FFT and higher.

Timeout can be prevented by relaxing butterfly constraint to 2.

added Bug Scheduling labels

Setting input_times = {f"in{i}": 4*i for i in range(points)} will again make it crash though. First operation should be able to happen at time 65. Even 2*i will cause it.

assigned to @simbj106

mentioned in merge request !478 (merged)

closed with merge request !478 (merged)