Attempt Number: 4
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 car2 on curb2 and car3 on curb3. We will move car2 from behind car3 on curb3 to the empty curb1. This frees curb3 and makes car3 clear, allowing further moves.

New State Description:
Curb_0 contains car_0, clear. Curb_1 now 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_2 car_3 curb_1)
