Attempt Number: 2
Error Message: The action and resulting child state have already been explored.

Action Reasoning:
The last action taken was "paint-up," where robot1 painted tile_0-3 black. According to the logical conclusions, after a "paint-up" action, the robot should move horizontally if there are unpainted tiles in the row above. Since tile_0-4 is not painted, the next best action is to move robot1 to the right from tile_1-3 to tile_1-4. This will position the robot to paint tile_0-4 in the next steps, aligning with the goal state pattern.

New State Description:
Robot1 moves from tile_1-3 to tile_1-4. Tile_1-3 is now clear, and tile_1-4 is occupied by robot1.

Action Chosen:
right(robot1, tile_1-3, tile_1-4)
