Current State ID: 55
Current State Description: - fast0: Fast elevator at floor 3 (n3), 0/2 passengers, empty.- fast1: Fast elevator at floor 2 (n2), 0/2 passengers, empty.- slow0-0: Slow elevator at floor 1 (n1), 0/1 passengers.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers.- p0: On floor 1 (n1).- p1: On floor 3 (n3), no longer on fast0.- p2: On floor 4 (n4).- p3: On floor 4 (n4).- p4: On floor 1 (n1).- p5: On floor 2 (n2), no longer on fast1.

Child State ID: 67
Action Taken: move-up-fast(fast1, n2, n4)
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), 0/1 passengers, empty.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers, empty.- p0: On floor 1 (n1).- p1: On floor 3 (n3), no longer on fast0.- p2: On floor 4 (n4).- p3: On floor 4 (n4).- p4: On floor 1 (n1).- p5: On floor 2 (n2).

Child State ID: 68
Action Taken: move-down-fast(fast0, n3, n1)
State Description: - fast0: Fast elevator now at floor 1 (n1), 0/2 passengers, empty.- fast1: Fast elevator at floor 2 (n2), 0/2 passengers, empty.- slow0-0: Slow elevator at floor 1 (n1), 0/1 passengers.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers.- p0: On floor 1 (n1).- p1: On floor 3 (n3).- p2: On floor 4 (n4).- p3: On floor 4 (n4).- p4: On floor 1 (n1).- p5: On floor 2 (n2).

