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 to move car5 from being double parked behind car0 in curb_0 to be double parked again somewhere it does not interfere with achieving the target configuration of other cars. This can temporarily free car0 by parking car5 behind car4 in curb_4.

New State Description:
Curb_0: Contains car0, parked and clear.Curb_1: Contains car2, parked and clear.Curb_2: Contains car1, parked and clear.Curb_3: Contains car3, parked and clear.Curb_4: Contains car4 with car5 double parked behind it, car4 blocked; car5 is clear.Car0: Parked and clear in curb0.Car1: Parked and clear in curb2.Car2: Parked and clear in curb1.Car3: Parked and clear in curb3.Car4: Parked and blocked in curb4 with car5 behind it.Car5: Double parked behind car4 in curb4, clear.

Action Chosen:
(move-car-to-curb car5 car0 curb4)
