Parent State ID: 120
State Depth: 13
Action Taken: (move-up-fast fast1 n1 n4)
Action Reasoning: Move fast1 up to floor 4 and board p0 and p3; this utilizes fast1 efficiently to transport two passengers towards their destinations, reducing waiting time.
State Description: - **fast0**: At floor 5 (n5), 0/2 passengers.- **fast1**: At floor 4 (n4), 0/2 passengers.- **slow0-0**: At floor 2 (n2), 1/1 passenger with p4 on board.- **p0**: On floor 4 (n4).- **p1**: On floor 1 (n1).- **p2**: On floor 5 (n5).- **p3**: On floor 4 (n4).- **p4**: On board slow0-0.- **p5**: On floor 0 (n0).- **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)', '(leave p2 fast1 n5 1 0)', '(board p5 fast1 n5 0 1)', '(move-down-fast fast1 n5 n0)', '(leave p5 fast1 n0 1 0)', '(move-up-fast fast0 n1 n2)', '(move-up-fast fast0 n2 n4)', '(move-up-fast fast1 n0 n1)', '(board p4 slow0-0 n2 0 1)', '(move-up-fast fast0 n4 n5)', '(move-up-fast fast1 n1 n4)']

successfully verified the action of new state 141 with the path: The last action `(move-up-fast fast1 n1 n4)` is valid as all preconditions are met, and the effects are correctly reflected in the current state. The natural language description, diagram encoding, and visualization accurately represent the current state, and the action moves us closer to the goal state.

INACTIVE REASON: Pruned in beam search
