Theorem: Execution.Step.Skip.progress_eq (ReactorModel/Execution/Theorems/Step/Skip.lean)

State before:
α : Type
inst✝ : Hierarchical α
s₁ s₂ : State α
e : s₁ ↓ₛ s₂
⊢ s₂.progress = Set.insert (rcn e) s₁.progress
Tactic:
simp [e.dst_eq, State.record_progress_eq]
State after:
no goals