Attempt Number: 2
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
To achieve the goal state, we need to clear Curb_3 by moving Car_1, which is currently double parked. The best choice is to move Car_1 to Curb_0 since it is clear, opening up Curb_3 for Car_3.

New State Description:
Curb_0: Car_1 parked and clear. Curb_1: Car_3 parked and clear. Curb_2: Car_2 parked and clear. Curb_3: Car_0 parked and clear.

Action Chosen:
(move-car-to-curb car1 car0 curb_0)
