Parent State ID: 69
State Depth: 8
Action Taken: change-color(robot1, white, black)
Action Reasoning: The robot is on tile_1-1, holding white, and needs to paint tile_2-1 black. First, the robot should change color to black to prepare for painting the correct color.
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 holding color black. 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 painted black. Robot1 is on tile_1-1, holding color black. 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)', 'change-color(robot1, white, black)']

successfully verified the action of new state 90 with the path: The last action `change-color(robot1, white, black)` is valid because all preconditions are met, and the effects are correctly updated in the current state. The action is logical for achieving the goal state as it prepares the robot to paint the next required tile. The natural language description and visualization of the current state are accurate and consistent with the sequence of actions taken.

INACTIVE REASON: Pruned in beam search
