Parent State ID: 7
State Depth: 5
Action Taken: pick-up(c)
Action Reasoning: To achieve the goal state, we need to move block c to the table and stack block d on top of it. Since block c is clear and the hand is empty, we can pick up block c.
State Description: Block a is on top of block b. Block c is held in the hand. Block b is on the table with block a on top of it. Block d is on the table and clear. The hand is holding block c.
Action Path: ['unstack(d, a)', 'put-down(d)', 'unstack(a, c)', 'stack(a, b)', 'pick-up(c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: 
