Attempt Number: 4
Error Message: The action and resulting child state have already been explored.

Action Reasoning:
The last action taken was "change-color," where Robot1 changed its paint color to white. According to the logical conclusions, after changing the color of the paint gun, the next action should be to paint the tile directly above the robot. Robot1 is currently positioned on tile_1-3 and is holding white paint, which matches the required color for tile_0-3 in the goal state. Therefore, the best action is to paint the tile above Robot1, tile_0-3, using the white paint it is holding.

New State Description:
Tile_0-3 is now painted white. Robot1 remains on tile_1-3, holding white paint.

Action Chosen:
paint-up(robot1, tile_0-3, tile_1-3, white)
