Attempt Number: 3
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Passenger p3 is already on fast1, so the best immediate action is to move-down-fast(fast1, n4, n0) to get closer to the goal state for p0 and p3.

New State Description:
- fast0: Fast elevator at floor 3 (n3), 0/2 passengers, available.- fast1: Fast elevator at floor 0 (n0), 1/2 passengers, with passenger p3 on board.- slow0-0: Slow elevator at floor 1 (n1), 0/1 passengers, available.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers, available.- p0: On floor 1 (n1), not on any elevator.- p1: On floor 3 (n3), not on any elevator.- p2: On floor 2 (n2), not on any elevator.- p3: On board fast1 at floor 0 (n0).- p4: On floor 3 (n3), not on any elevator.- p5: On floor 2 (n2), not on any elevator.

Action Chosen:
move-down-fast(fast1, n4, n0)
