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

Action Reasoning:
The last action taken was "paint-up," meaning the robot is ready to move to the next tile horizontally. Since the current tile above (tile_0-2) is painted and the robot is at tile_1-2, we should move robot1 to the right, from tile_1-2 to tile_1-3, to continue painting the row above in the alternating pattern. Moving right aligns with our goal state pattern and adheres to the logical steps for painting the tiles. This move is crucial to position the robot correctly for the next painting action and avoids repeating any previously explored states.

New State Description:
Robot1 moves from tile_1-2 to tile_1-3, holding black paint. Tile_1-2 is now clear, and tile_1-3 is occupied by Robot1.

Action Chosen:
right(robot1, tile_1-2, tile_1-3)
