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 curb_3 to have car_3, curb_2 to have car_2, curb_1 to have car_1, and curb_0 to have car_0. We will first ensure curb_2 is clear by moving car_1 to the vacant curb_1. This frees curb_2 for car_2.

New State Description:
Curb_0 contains car_0 and is clear. Curb_1 contains car_2 and is clear, as car_2 moved there. Curb_2 contains car_1, and is now clear since car_2 moved. Curb_3 has car_3 parked and clear. Car_0 is parked and clear. Car_1 is parked and was cleared by this move. Car_2 is parked alone on curb_1 and is clear. Car_3 is parked and clear.

Action Chosen:
(move-car-to-curb car_2 car_1 curb_1)
