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

Action Reasoning:
The last action taken was "change-color," so the next logical step is to paint the tile above the robot. The robot is currently holding the white paint gun and is on tile_1-1. The tile directly above, tile_0-1, needs to be painted white according to the goal state. This action will bring us closer to the goal state by painting tile_0-1 white, as required.

New State Description:
Tile_0-1 is now painted white. Robot1 is still holding the white paint gun while standing on tile_1-1. Tile_1-1 remains occupied by the robot.

Action Chosen:
paint-up(robot1, tile_0-1, tile_1-1, white)
