Parent State ID: 50
State Depth: 7
Action Taken: paint-down(robot1, tile_2-1, tile_1-1, black)
Action Reasoning: The robot is currently on tile_1-1 holding black, and tile_2-1 is clear and needs to be painted black. The best action is to paint-down to achieve the goal state for tile_2-1.
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 painted black. 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)', 'paint-down(robot1, tile_2-1, tile_1-1, black)']

INACTIVE REASON: action path invalid: The last action is invalid because the precondition that `tile_2-1` must be clear is not satisfied, as it is already painted black. The current state's natural language description and visualization are accurate, but the action does not logically progress towards the goal state.
