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

Action Reasoning:
The highest priority is to move Robot1 to tile_1-0, which is the starting point for painting the tiles above. Since Robot1 is currently at tile_1-2, the next step is to continue moving it left towards tile_1-0. We haven't yet explored moving left from tile_1-2 to tile_1-1 in this current session of actions, so this action will move us closer to our goal without repeating previous actions.

New State Description:
Robot1 has moved to tile_1-1, making tile_1-2 clear. Robot1 is still holding the white paint gun. Tile_1-1 is now occupied by Robot1.

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