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Proof step 17 from proof inv-read-echdr (previous step)

# buf1 = EB_PAGE_SIZE, pebs[m0] = mkpeb(buf0, m1, false), err = ESUCCESS, m0 < # pebs, mtd-cons(pebs), EB_PAGE_SIZE ≤ PEB_SIZE, err = ESUCCESS → buf1 = subarray(buf0, 0, EB_PAGE_SIZE), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪let ehdr = ? in {decode_echeader#(EB_PAGE_SIZE, buf1; ehdr; err); if err = ESUCCESS then aehdr := aechdr(ehdr.ec)}⟫ true, buf1 = emptypage

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Proof step 18:
# buf1 = EB_PAGE_SIZE, pebs[m0] = mkpeb(buf0, m1, false), err = ESUCCESS, m0 < # pebs, mtd-cons(pebs), EB_PAGE_SIZE ≤ PEB_SIZE, err = ESUCCESS → buf1 = subarray(buf0, 0, EB_PAGE_SIZE), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪decode_echeader#(EB_PAGE_SIZE, buf1; ehdr; err); if err = ESUCCESS then aehdr := aechdr(ehdr.ec)⟫ true, buf1 = emptypage

Proof step 17 from proof inv-read-echdr (previous step)

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Rule argument

Additional information