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

Action Reasoning:
The last action was changing the color of the paint gun from white to black. According to the rules, after changing the color, the next action should be to paint the tile above the robot. Robot1 is currently on tile_1-1, holding black paint. The tile directly above, tile_0-1, is already painted white, so the robot should move to the next unpainted tile in the row above. The next unpainted tile in row 0 is tile_0-2, which is directly above tile_1-2. Therefore, the best action is to move Robot1 to tile_1-2.

New State Description:
Robot1 moves from tile_1-1 to tile_1-2. The tile_1-1 becomes clear, and tile_1-2 is now occupied by Robot1, holding black paint.

Action Chosen:
right(robot1, tile_1-1, tile_1-2)
