Parent State ID: 146
State Depth: 15
Action Taken: board(p4, slow0-0, n1, 0, 1)
Action Reasoning: We need to get passenger p4 from floor 1 to floor 3 while minimizing elevator occupancy. Boarding p4 into slow0-0 minimizes capacity use because it only holds one passenger max.
State Description: - fast0: Fast elevator at floor 3 (n3), 0/2 passengers, empty.- fast1: Fast elevator at floor 4 (n4), 0/2 passengers, empty.- slow0-0: Slow elevator at floor 1 (n1), 1/1 passengers, full with p4.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers, empty.- p0: On floor 1 (n1), waiting.- p1: On floor 3 (n3), at destination.- p2: On floor 2 (n2), at destination.- p3: On floor 4 (n4), ready to board.- p4: On board slow0-0 at floor 1 (n1).- p5: On floor 2 (n2), at destination.
Action Path: ['board(p5, fast1, n3, 0, 1)', 'move-down-fast(fast1, n3, n2)', 'move-up-fast(fast0, n0, n1)', 'board(p1, fast0, n1, 0, 1)', 'move-up-fast(fast0, n1, n3)', 'leave(p1, fast0, n3, 1, 0)', 'leave(p5, fast1, n2, 1, 0)', 'move-up-fast(fast1, n2, n4)', 'board(p2, fast1, n4, 0, 1)', 'move-down-fast(fast1, n4, n2)', 'leave(p2, fast1, n2, 1, 0)', 'move-up-fast(fast1, n2, n4)', 'move-down-fast(fast1, n4, n0)', 'move-up-fast(fast1, n0, n4)', 'board(p4, slow0-0, n1, 0, 1)']

successfully verified the action of new state 159 with the path: The last action `board(p4, slow0-0, n1, 0, 1)` is valid because all preconditions are satisfied: `slow0-0` is at floor `n1`, `p4` is at floor `n1`, and the elevator has capacity. The effects of the action are correctly reflected in the current state. The natural language description and visualization of the current state are accurate, with all objects correctly represented.

INACTIVE REASON: Pruned in beam search
