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

Action Reasoning:
To move towards the goal state, we should first clear curb_3 where car_3 and car_1 are currently double parked. Since curb_2 is empty, we can move car_1 from being double parked behind car_3 to curb_2. This matches our needs because car_2 should remain clear after moving car_1 in ambiguous configurations with a single unit.

New State Description:
Curb_0 contains car_0, clear. Curb_1 contains car_2, clear. Curb_2 contains car_1, clear. Curb_3 contains car_3, clear. Car_0 is parked and clear. Car_1 is parked and clear. Car_2 is parked and clear. Car_3 is parked and clear.

Action Chosen:
(move-car-to-curb car_1 car_3 curb_2)
