Attempt Number: 4
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Passenger p4 on floor 1 (n1) needs to go to floor 3 (n3). The fast0 elevator is currently at floor 3 and is empty, while the slow0-0 elevator is on floor 1 and can carry p4 to floor 2, and then to floor 3. First, board p4 onto slow0-0.

New State Description:
- Elevator fast0 is at floor 3 (n3), empty, capacity 2.- Elevator fast1 remains at floor 2 (n2), empty, capacity 2.- Elevator slow0-0 is at floor 1 (n1), with passenger p4 onboard, capacity 0/1.- Elevator slow1-0 remains at floor 2 (n2), empty, capacity 1.- Passenger p0 is on floor 0 (n0).- Passenger p1 is on floor 3 (n3).- Passenger p2 is on floor 2 (n2).- Passenger p3 is on floor 0 (n0).- Passenger p4 is onboard slow0-0 at floor 1 (n1).- Passenger p5 is on floor 2 (n2).

Action Chosen:
board(p4, slow0-0, n1, 0, 1)
