Parent State ID: 3
State Depth: 3
Action Taken: stack(a, c)
Action Reasoning: To achieve the goal state, we need to stack blocks in the correct order. The next logical step is to stack block 'a' on block 'c', as both are clear and this aligns with the goal configuration.
State Description: There are four blocks: a, b, c, and d. The hand is empty. Block a is on top of block c and is clear. Block b is on the table and is clear. Block c is on the table and is supporting block a. Block d is on top of block a and is clear.
Action Path: ['unstack(c, d)', 'put-down(c)', 'stack(a, c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: Preconditions for the action stack(a, c) are not met; the hand is not holding block 'a'.
