⊦ adr ∈ (as ++ @(m0, m1, m2)) | m0 ↔ adr = @(m0, m1, m2) ∨ adr ∈ as | m0
Used simplifier rules: ⊦ adr ∈ as ++ adr0 ↔ adr = adr0 ∨ adr ∈ as; (s)