Parent State ID: 26
State Depth: 5
Action Taken: (move-up-fast fast0 n2 n4)
Action Reasoning: Fast0 should move to floor 4 (n4) to pick up passengers p0 and p3, who need to get to floor 5, because this aligns floors and minimizes future costs.
State Description: - **fast0**: At floor 4 (n4), 0/2 passengers.- **fast1**: At floor 5 (n5), 1/2 passengers, p2 onboard.- **slow0-0**: At floor 2 (n2), 0/1 passengers.- **p0**: On floor 4 (n4).- **p1**: On floor 1 (n1).- **p2**: Onboard fast1 at floor 5 (n5).- **p3**: On floor 4 (n4).- **p4**: On floor 2 (n2).- **p5**: On floor 5 (n5).- **p6**: On floor 2 (n2).
Action Path: ['(board p2 fast1 n3 0 1)', '(move-up-fast fast1 n3 n5)', '(move-up-fast fast0 n0 n1)', '(move-up-fast fast0 n1 n2)', '(move-up-fast fast0 n2 n4)']

successfully verified the action of new state 40 with the path: The last action `(move-up-fast fast0 n2 n4)` is valid as all preconditions are satisfied, and the effects are correctly updated in the current state. The natural language description, diagram encoding, and visualization of the current state are accurate and consistent with the sequence of actions taken.

INACTIVE REASON: Pruned in beam search
