| ubi-io-read-echdr-pre(m, apebs), abs(pebs, apebs), ubi-io-inv(apebs), m0 = EB_PAGE_SIZE, mtd-cons(pebs), aehdr = aehdr0 ⊦ ⟪ubi_io_read_echdr#(m, m0, pebs; aehdr; bitflips, err)⟫ ⟨aubi_io_read_echdr#(m, apebs; aehdr0; isbad, err0)⟩ (abs(pebs, apebs) ∧ aehdr = aehdr0 ∧ (bitflips ↔ isbad) ∧ err = err0) |