Parent State ID: 8
State Depth: 5
Action Taken: stack(d, c)
Action Reasoning: To achieve the goal state, we need to move block 'd' onto block 'c'. Since block 'd' is already clear and on the table, and block 'c' is clear, we can use the stack action to place 'd' on 'c'.
State Description: Block 'a' is on the table and clear. Block 'c' is supporting block 'd' and is on top of block 'b'. Block 'b' is on the table. Block 'd' is on top of block 'c' and clear. The hand is empty. In the diagram, 'd' is now on top of 'c', which is on 'b'.
Action Path: ['unstack(d, a)', 'put-down(d)', 'unstack(a, c)', 'put-down(a)', 'stack(d, c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: The precondition that the hand must be holding 'd' is not satisfied.
