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

Action Reasoning:
The last action taken was a "paint-up" using robot1, which means the next best action is to move the robot horizontally if there are still tiles to be painted in the row above. Since tile_0-3 is not painted, the robot should move to the right to position itself under the next unpainted tile. This will allow the robot to paint tile_0-3 in the subsequent steps.

New State Description:
Robot1 moves from tile_1-2 to tile_1-3, preparing to paint the tile directly above it.

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