intros t es ρ
⊢ ∀ (t : TraceRel') (es : vset F SysEl) (ρ : Config F), (trace' t es | ρ) = trace (t | ρ) (es | ρ)
t : TraceRel'
es : vset F SysEl
ρ : Config F
⊢ (trace' t es | ρ) = trace (t | ρ) (es | ρ)