Parent State ID: 48
State Depth: 10
Action Taken: stack(a, c)
Action Reasoning: To achieve the goal state, we need to place block 'a' on block 'c'. Since the hand is currently holding block 'a' and block 'c' is clear, the best action is to stack 'a' on 'c'.
State Description: The hand is now empty. Block 'a' is on block 'c', and block 'c' is supporting block 'a' and is no longer clear. Block 'b' is supporting block 'd' and is not clear. Block 'd' is on block 'b' and is clear.
Action Path: ['unstack(c, d)', 'put-down(c)', 'unstack(d, a)', 'stack(d, b)', 'pick-up(a)', 'stack(a, c)', 'unstack(d, b)', 'stack(d, b)', 'unstack(a, c)', 'stack(a, c)']

INACTIVE REASON: Pruned in beam search
