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

Action Reasoning:
The next best action is to leave passenger p4 at floor 3 using fast0. This action will help to achieve the goal state where p4 needs to be on floor 3 and fast0 is currently holding p4 at floor 1, about to move it. This maintains minimal occupancy in elevators at each step.

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

Action Chosen:
move-up-fast(fast0, n1, n3)
