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Proof step 19 from proof refine-write-vidhdr (previous step)

# buf2 = EB_PAGE_SIZE, apebs[m2] = mkpeb(aehdr, empty, buf0, m1, false), pebs[m2] = mkpeb(buf1, EB_PAGE_SIZE, false), err = ESUCCESS, aehdr.valid?, m2 < # pebs, m2 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, EB_PAGE_SIZE, false), mkpeb(aehdr, empty, buf0, m1, false)), mtd-cons(pebs), ubi-io-inv(apebs), err = ESUCCESS → is-encoded(vidhdr(v, m, m0, m3, m4), buf2), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪mtd_asm_write#(m2, EB_PAGE_SIZE, 0, EB_PAGE_SIZE, buf2; pebs; err)⟫ ⟨aubi_io_write_vidhdr#(m2, avidhdr(v, m, m0, m3, m4); apebs; err0)⟩ (abs(pebs, apebs) ∧ err = err0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
# buf2 = EB_PAGE_SIZE, pebs[m2] = mkpeb(buf1, EB_PAGE_SIZE, false), apebs[m2] = mkpeb(aehdr, empty, buf0, m1, false), aehdr.valid?, m2 < # apebs, m2 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, EB_PAGE_SIZE, false), mkpeb(aehdr, empty, buf0, m1, false)), is-encoded(vidhdr(v, m, m0, m3, m4), buf2), mtd-cons(pebs), ubi-io-inv(apebs) ⊦ ⟪mtd_asm_write#(m2, EB_PAGE_SIZE, 0, EB_PAGE_SIZE, buf2; pebs; err)⟫ ⟨aubi_io_write_vidhdr#(m2, avidhdr(v, m, m0, m3, m4); apebs; err0)⟩ (abs(pebs, apebs) ∧ err = err0)

Rule argument

Additional information

Used simplifier rules: is-encoded-size: ⊦ is-encoded(vhdr, buf) → # buf = EB_PAGE_SIZE; (forward) from specification encoding-page-size-nonempty[encoding-vidheader]