Parent State ID: 8
State Depth: 5
Action Taken: stack(d, c)
Action Reasoning: To achieve the goal state, we need to place block 'd' on top of block 'c'. Since block 'd' is clear and on the table, and block 'c' is clear, we can perform the stack action to move closer to the goal.
State Description: Block 'a' is on the table and clear. Block 'c' is on top of block 'b' and supporting block 'd'. Block 'b' is on the table. Block 'd' is on top of block 'c' and clear. The hand is empty.
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 hand is not holding block 'd', violating the precondition for the stack action.
