Parent State ID: 61
State Depth: 10
Action Taken: stack(block_d, block_c)
Action Reasoning: Block D should be placed on Block C as per the goal configuration. Since the hand is holding Block D and Block C is clear, the best next action is to stack Block D on Block C.
State Description: Block A is on the table and clear. Block B is on the table and clear. Block C is on the table and not clear as it supports Block D. Block D is on Block C and clear. The hand is empty.
Action Path: ['unstack(block_b, block_c)', 'stack(block_b, block_d)', 'unstack(block_b, block_d)', 'stack(block_b, block_d)', 'unstack(block_b, block_d)', 'stack(block_b, block_c)', 'unstack(block_b, block_c)', 'put-down(block_b)', 'pick-up(block_d)', 'stack(block_d, block_c)']

INACTIVE REASON: action path invalid: The last action `stack(block_d, block_c)` is invalid because the preconditions are not met: the hand is not holding `block_d`, and `block_c` is not clear. The current state's description and visualization are accurate, but the action sequence is incorrect.
