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Proof step 12 from proof inv-read-vidhdr (previous step)

pebs[m0] = mkpeb(buf0, m1, false), buf = mkbuf(EB_PAGE_SIZE), m0 < # pebs, mtd-cons(pebs), 2 * EB_PAGE_SIZE ≤ PEB_SIZE ⊦ [ubi_io_read#(m0, EB_PAGE_SIZE, 0, EB_PAGE_SIZE, pebs; buf; bitflips, err)] ( # buf = EB_PAGE_SIZE ∧ EB_PAGE_SIZE ≤ # buf ∧ (err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → buf = subarray(pebs[m0].data, EB_PAGE_SIZE, EB_PAGE_SIZE)) → ⟪if err = ESUCCESS then if buf = mkempbuf(# buf) then avhdr := empty else let vhdr = ? in {decode_vidheader#(EB_PAGE_SIZE, buf; vhdr; err); if err = ESUCCESS then avhdr := avidhdr(vhdr.vol, vhdr.leb, vhdr.sqn, vhdr.size, vhdr.checksum)}⟫ true)

User applied rule skip call

And obtained the following new goals

Rule argument

pos: right 1

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