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Proof step 64 from proof refine-write-echdr (previous step)

# buf2 = EB_PAGE_SIZE, apebs[m2] = mkpeb(empty, avhdr, buf0, m1, false), pebs[m2] = mkpeb(buf1, 0, false), err = err0, m = 0, m0 = m2, n0 = EB_PAGE_SIZE, n1 = 0, m2 < # pebs, m2 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 0, false), mkpeb(empty, avhdr, buf0, m1, false)), is-aligned(n, EB_PAGE_SIZE), is-encoded(echdr(m3), buf2), mtd-cons(pebs), ubi-io-inv(apebs), ⌊err0⌋ ∨ err0 = ESUCCESS, n < n0 ∨ n = 0 ∧ n0 = 0 ⊦ ⟪pebs[m0].data := copy(buf2, n1, pebs[m0].data, m, n); pebs[m0].fill := m + n⟫ ⟨aubi_io_write_echdr#(m2, aechdr(m3); apebs; err1)⟩ (abs(pebs, apebs) ∧ err = err1), err = ESUCCESS, n = 0

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)% ⊦ EB_PAGE_SIZE ≠ 0; (s)%m ≠ 0 ⊦ is-aligned(n, m) → (n < m ↔ n = 0); (s)% ⊦ n + 0 = n; (s)%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic%c: ⊦ m + n = n + m; from specification nat-basic