Parent State ID: 11
State Depth: 6
Action Taken: unstack(c, b)
Action Reasoning: Block b is not clear, so I need to make it clear before stacking anything on it. The block c on b is clear, meaning I can pick it up to clear block b.
State Description: Block `a` is on the table and clear. Block `b` is on the table and clear. Block `c` is held by the hand and not clear. Block `d` is in the hand and supported by the hand. The hand is not empty.
Action Path: ['unstack(d, a)', 'put-down(d)', 'unstack(a, c)', 'put-down(a)', 'pick-up(d)', 'unstack(c, b)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: The hand is not empty, violating the precondition for unstacking.
