simp_all
case exec.skip
α : Type
inst✝ : Readable α
s s₁ s₂ : State α
e✝ : s ↓ₑ s₁
s✝ : s ↓ₛ s₂
h : Step.Exec.rcn e✝ = Step.Skip.rcn s✝
this✝ : ¬State.Triggers s (Step.Skip.rcn s✝)
this : State.Triggers s (Step.Exec.rcn e✝)
⊢ s₁ = s₂
no goals