Parent State ID: 2
State Depth: 3
Action Taken: stack(d, c)
Action Reasoning: The goal is to have block d on block c. Since both blocks c and d are clear and on the table, the best action is to stack d on c.
State Description: The hand is empty. Block a is on the table. Block b is on top of block a and is clear. Block c is on the table and is now supporting block d. Block d is on block c and is clear.
Action Path: ['unstack(c, b)', 'put-down(c)', 'stack(d, c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: The hand is not holding block d, violating the precondition for the stack action.
