⊦ as = as0 ↔ (∀ adr. adr ∈ as ↔ adr ∈ as0)
⊦ ∀ adr. adr ∈ (as ++ @(m0, m1, m2)) | m0 ↔ adr ∈ (as | m0) ++ @(m0, m1, m2)
Used terms: (as | m0) ++ @(m0, m1, m2), (as ++ @(m0, m1, m2)) | m0