aesop
Worlds : Finset (Finset Formula)
MG : ModelGraph Worlds
β : Program
m : ℕ
YS : Vector { x // x ∈ Worlds } (m + 1).succ
i : Fin m
relSteps : relate (↑MG) β (YS.get i.succ.castSucc) (YS.get i.succ.succ)
⊢ YS.tail.get i.castSucc = YS.get i.succ.castSucc
no goals