| m < # apebs ⊦ apebs[m] = mkpeb(aehdr, avhdr, buf0, m0, boolvar0) ∧ valid-peb(mkpeb(aehdr, avhdr, buf0, m0, boolvar0)) ∧ valid-peb(mkpeb(aehdr, avhdr, buf1, m1, boolvar1)) → (unique-sqns(apebs[m, mkpeb(aehdr, avhdr, buf1, m1, boolvar1)]) ↔ unique-sqns(apebs)) |