Parent State ID: 13
State Depth: 4
Action Taken: left(robot1, tile_1-2, tile_1-1)
Action Reasoning: Since robot1 is standing on tile_1-2 and holding the color white, it can paint tile_2-2 directly below. I will move robot1 left to tile_1-1 to prepare to paint the black tiles.
State Description: Tile tile_0-1 is clear.Tile tile_0-2 is clear.Tile tile_0-3 is clear.Tile tile_1-1 is occupied by robot1.Tile tile_1-2 is clear.Tile tile_1-3 is clear.Tile tile_2-1 is clear.Tile tile_2-2 is painted white.Tile tile_2-3 is clear.Robot1 is on tile_1-1, holding color white.Colors white and black are available for switching.
Action Path: ['right(robot1, tile_0-1, tile_0-2)', 'down(robot1, tile_0-2, tile_1-2)', 'paint-down(robot1, tile_2-2, tile_1-2, white)', 'left(robot1, tile_1-2, tile_1-1)']

successfully verified the action of new state 21 with the path: The last action `left(robot1, tile_1-2, tile_1-1)` is valid as all preconditions are met, and the effects are correctly reflected in the current state. The action positions the robot to potentially paint `tile_2-1`, aligning with the goal state requirements. The natural language description and visualization accurately represent the current state.

INACTIVE REASON: Pruned in beam search
