Parent State ID: 46
State Depth: 7
Action Taken: stack(block_d, block_c)
Action Reasoning: To achieve the goal state, block D needs to be on block C. Since block D is clear and the hand is empty, we can pick up block D and stack it on block C.
State Description: Block A is on the table and clear. Block B is on block C and clear. Block C is on the table and not clear. Block D is on block C and not 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)', 'stack(block_d, block_c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: Preconditions for stacking block_d on block_c are not met.
