Parent State ID: 1
State Depth: 2
Action Taken: stack(d, c)
Action Reasoning: To achieve the goal state, block d should be placed on block c. Since the hand is currently holding block d, the next logical step is to stack d on c, which aligns with the goal configuration.
State Description: Block d is on top of block c, block a is clear and on top of block c, block c is on top of block b, and block b is on the table. The hand is empty. The diagram now shows block d on top of block c, with block a still on top of block c.
Action Path: ['unstack(d, a)', 'stack(d, c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: Block c is not clear, so the stack action is invalid.
