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

Action Reasoning:
The last action taken was a color change, so the next logical step is to paint the tile directly above the robot. The robot is currently on tile_1-4 and holding black paint. According to the goal state, tile_0-4 should be painted black. Therefore, the best action is to paint-up from tile_1-4 to tile_0-4 with the black color.

New State Description:
Tile_0-4 is now painted black, and robot1 remains on tile_1-4 holding black paint.

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