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Proof step 31 from proof refine-change (previous step)

# apebs = # wlar, # apebs0 = # wlar0, LEB_SIZE = n1 + n, apebs0[n0] = mkpeb(aehdr, avhdr, buf0, m, boolvar), err = err1, vtblpnum < # avols[v], vtblpnum < # vols[v], abs(avols, apebs, vols, q), bflipset-cons(bflipset, wlar), bflipset-cons(bflipset0, wlar0), ebm-cons(avols), is-aligned(n, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-inv(apebs0), unique-sqns(apebs), unique-sqns(apebs0), valid-ebatbl(apebs, wlar, vols, vtblpnum0), valid-ebatbl(apebs0, wlar0, vols0, vtblpnum1), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-eraseq(apebs0, q0), valid-eraseq(wlar0, q0), valid-eraseq(q0), valid-global-sqn(apebs, sqnum), valid-global-sqn(apebs0, sqnum0), valid-vtbl(apebs, vols, wlar, vtblpnum0), valid-vtbl(apebs0, vols0, wlar0, vtblpnum1), valid-wl(apebs, wlar), valid-wl(apebs0, wlar0), v ∈ avols, v ∈ vols, n ≤ LEB_SIZE, n ≤ # buf, err1 = ESUCCESS → q0.lebrefs ⊆ q.lebrefs ++ (v × vtblpnum) ∧ (vols[v][vtblpnum] ≠ unmapped → id(apebs0, apebs, mapped-pebs(vols) -- vols[v][vtblpnum].pnum)) ∧ (vols[v][vtblpnum] = unmapped → id(apebs0, apebs, mapped-pebs(vols))) ∧ vols0 = vols[v, vols[v][vtblpnum, ⌜n0⌝ ]] ∧ buf0 = subarray(buf, 0, n) + mkempbuf(n1) ∧ m = align↑(datasize(buf, n), EB_PAGE_SIZE), err1 ≠ ESUCCESS → vols0 = vols ∧ id(apebs0, apebs, mapped-pebs(vols)) ∧ q0.lebrefs ⊆ q.lebrefs, err1 = ESUCCESS ∨ ⌊err1⌋ ⊦ ⟨skip⟩ (abs(avols, apebs0, vols0, q0) ∧ err1 = err), err = ESUCCESS, VTBL_VOLID ∈ vols, VTBL_VOLID ∈ vols0

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)%abs-idset-fwd: ⊦ id(apebs1, apebs0, mapped-pebs(vols)) ∧ valid-ebatbl(apebs0, wlar, vols, n0) ∧ abs(avols, apebs0, vols, q) → abs(avols, apebs1, vols, q); (forward) from specification ubi-abs%⊦ q1.lebrefs ⊆ q0.lebrefs ∧ abs(avols, apebs, vols, q0) → abs(avols, apebs, vols, q1); (ss)