Attempt Number: 6
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Moving car1 to curb2 makes curb1 match its goal state and frees up space in curb2 for future moves.

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

Action Chosen:
(move-car-to-curb car1 car2 curb2)
