Attempt Number: 3
Error Message: The action and resulting child state have already been explored.

Action Reasoning:
The last action taken was a color change, where the robot changed its paint gun color to white. According to the problem's instructions, after a color change, the next logical step is to paint the tile directly above the robot. The robot is currently on tile_1-4, holding white paint. The tile above, tile_0-4, is not painted yet. Therefore, the best action is to paint tile_0-4 with the white color the robot is currently holding.

New State Description:
Tile_0-4 is now painted white. Robot1 is still on tile_1-4, holding white paint. The tile above tile_1-4 is no longer clear because it is now painted.

Action Chosen:
paint-up(robot1, tile_0-4, tile_1-4, white)
