Parent State ID: 33
State Depth: 9
Action Taken: stack(d, b)
Action Reasoning: To achieve the goal state, block 'd' needs to be on top of block 'b'. Since block 'd' is clear and on the table, and block 'b' is clear, we can stack 'd' on 'b' to move closer to the goal.
State Description: The hand is now empty. Block 'd' is on block 'b' and is clear. Block 'b' is not clear. Block 'a' is on block 'c' and is not clear. Block 'c' remains under block 'a' and is not clear.
Action Path: ['unstack(c, d)', 'put-down(c)', 'unstack(d, a)', 'put-down(d)', 'pick-up(a)', 'stack(a, c)', 'pick-up(b)', 'stack(b, a)', 'stack(d, b)']

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