Simulating Elevators in TLA+ is a fun exercise. https://github.com/tlaplus/Examples/blob/master/specifications/MultiCarElevator/Elevator.tla https://github.com

Simulating Elevators in TLA+ is a fun exercise. https://github.com/tlaplus/Examples/blob/master/specifications/MultiCarElevator/Elevator.tla https://github.com/tlaplus/Examples/blob/master/specificatio... Another interesting, and underrated one: hotel keys.