Parent State ID: 69
State Depth: 8
Action Taken: down(robot1, tile_1-1, tile_2-1)
Action Reasoning: The robot is currently on tile_1-1 holding white, and the goal is to paint tile_2-1 black. The robot should move down to tile_2-1 to prepare for painting it black.
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 clear. Tile tile_1-2 is clear. Tile tile_1-3 is clear. Tile tile_2-1 is occupied by robot1 holding color white. Tile tile_2-2 is painted white. Tile tile_2-3 is painted black. Robot1 is on tile_2-1, 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)', 'change-color(robot1, white, black)', 'paint-down(robot1, tile_2-3, tile_1-2, black)', 'left(robot1, tile_1-2, tile_1-1)', 'change-color(robot1, black, white)', 'down(robot1, tile_1-1, tile_2-1)']

successfully verified the action of new state 89 with the path: The last action `down(robot1, tile_1-1, tile_2-1)` is valid as all preconditions are met, and the effects are correctly reflected in the current state. The action positions the robot to 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
