Parent State ID: 11
State Depth: 4
Action Taken: change-color(robot1, black, white)
Action Reasoning: The robot is currently on tile_1-2 and holding the color black. The next tile to be painted is directly below, tile_2-2, which needs to be painted white. First, we need to change the robot's color from black to white.
State Description: (tile_0-1: clear, tile_0-2: clear, tile_0-3: clear, tile_1-1: clear, tile_1-2: occupied by robot1 holding color white, tile_1-3: clear, tile_2-1: clear, tile_2-2: clear, tile_2-3: clear, robot1: on tile_1-2 holding color white, color_white: available, color_black: available)
Action Path: ['down(robot1, tile_0-1, tile_1-1)', 'change-color(robot1, white, black)', 'right(robot1, tile_1-1, tile_1-2)', 'change-color(robot1, black, white)']

INACTIVE REASON: action path invalid: The last action `change-color(robot1, black, white)` is valid in terms of preconditions and effects, but it does not position the robot to paint the necessary tile for achieving the goal state. The robot is not in the correct position to paint down on tile_2-2, which is required for the goal. The current state description and visualization are accurate, but the action does not contribute to reaching the goal state.
