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

Action Reasoning:
To progress towards the goal, we need to free car_3 by moving car_2 to curb_1 since it's clear. This will align with the end goal where car_2 is eventually positioned in curb_2.

New State Description:
Curb_0: Contains car_0, clear.  Curb_1: Contains car_2, clear.  Curb_2: Contains car_3, clear.  Curb_3: Contains car_1, clear.

Action Chosen:
(move-car-to-curb car_2 car_3 curb_1)
