Parent State ID: 11
State Depth: 7
Action Taken: pick-up(b)
Action Reasoning: To reach the goal state, block `b` needs to be on top of block `c`. Since block `b` is clear and on the table, while the hand is empty, the best action is to pick up block `b` to stack it on block `c`.
State Description: Block `a` is on block `d` and clear. Block `b` is in the hand and not clear. Block `c` is on the table and clear. Block `d` is on the table and supporting block `a`. The hand is holding block `b`.
Action Path: ['unstack(d a)', 'put-down(d)', 'pick-up(a)', 'stack(a d)', 'unstack(c b)', 'put-down(c)', 'pick-up(b)']

successfully verified the action of new state 14 with the path: The last action, `pick-up(b)`, is valid because all preconditions are met: `b` is clear, on the table, and the hand is empty. The current state's description and visualization accurately reflect the effects of the actions taken, and all objects are correctly represented. The current state is closer to the goal state, with `a` on `d` and `b` ready to be placed on `c`.
