Attempt Number: 2
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Robot1 should paint the tile directly below its current position, tile_2-2, with black, as it aligns with the goal state and follows the constraint of painting downwards.

New State Description:
- Robot1 is on tile_1-2, holding the color black.- Tiles Status:  - Row 0: tile_0-1, tile_0-2, tile_0-3 are clear.  - Row 1: tile_1-1 is clear, tile_1-2 is occupied by robot1, tile_1-3 is clear.  - Row 2: tile_2-1 is clear, tile_2-2 is painted black, tile_2-3 is clear.  - Row 3: tile_3-1 is painted white, tile_3-2 is painted black, tile_3-3 is painted white.- Available Colors:  - White and black are available for switching.

Action Chosen:
paint-down(robot1, tile_2-2, tile_1-2, black)
