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