Attempt Number: 4
Error Message: The action paint-up(robot1, tile_0-4, tile_1-4, white) has already been explored.

Action Reasoning:
The last action taken was a color change from black to white. According to the strategy, after changing the color of the paint gun, the next step should be to perform a paint-up action. This means painting the tile directly above the robot's current position, which is tile_0-4. This action will incrementally lead us towards achieving the goal state by painting tile_0-4 white, aligning with the goal pattern. Additionally, it ensures variety in actions and state changes, avoiding redundancy.

New State Description:
Tile_0-4 is painted white by robot1, which is standing on tile_1-4. The robot remains on tile_1-4, now holding a white paint gun. Tile_0-4 is no longer clear.

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