Parent State ID: 11
State Depth: 8
Action Taken: stack(block_a, block_c)
Action Reasoning: To achieve the goal state, block 'a' needs to be placed on block 'c'. Currently, the hand is holding block 'a', and block 'c' is clear. The best action is to stack block 'a' on block 'c'.
State Description: Block 'a' is on block 'c' and clear. Block 'b' is on the table and clear. Block 'c' is on the table and supporting block 'a'. Block 'd' is on the table and clear. The hand is empty.
Action Path: ['unstack(block_a, block_d)', 'put-down(block_a)', 'unstack(block_d, block_b)', 'put-down(block_d)', 'unstack(block_b, block_c)', 'put-down(block_b)', 'pick-up(block_a)', 'stack(block_a, block_c)']

successfully verified the action of new state 12 with the path: The last action `stack(block_a, block_c)` is valid because all preconditions are satisfied in the parent state, and the effects are correctly updated in the current state. The current state's description and visualization accurately reflect the sequence of actions taken, and the goal state is achieved.
