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Proof step 183 from proof refine-write (previous step)

avols[default-volid][m2] = mapped(buf0, n2), m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), default-volid ∈ avols, n2 ≤ m1, n3 + n ≤ # buf, m1 + n ≤ LEB_SIZE, ⌊err1⌋ , ∀ n0. ¬ n0 < n ∨ ¬ is-aligned(n0, EB_PAGE_SIZE) ⊦ ⟨err := err1; avol := abs(avols[default-volid]); if err = ESUCCESS then if n ≠ 0 then avol[m2] := mapped(avol[m2].data + mkempbuf(m1 - # avol[m2].data) + subarray(buf, n3, n)) else choose n1 with n1 < n ∧ is-aligned(n1, EB_PAGE_SIZE) in if n1 ≠ 0 then avol[m2] := mapped(avol[m2].data + mkempbuf(m1 - # avol[m2].data) + subarray(buf, n3, n1)) ifnone skip⟩ (avol = abs(avols[default-volid]) ∧ err1 = err)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 184:
avols[default-volid][m2] = mapped(buf0, n2), err = err1, m2 < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(m1, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), default-volid ∈ avols, m1 + n ≤ LEB_SIZE, n3 + n ≤ # buf, n2 ≤ m1, ⌊err1⌋ , ∀ n0. ¬ n0 < n ∨ ¬ is-aligned(n0, EB_PAGE_SIZE) ⊦ ⟨avol := abs(avols[default-volid]); if err = ESUCCESS then if n ≠ 0 then avol[m2] := mapped(avol[m2].data + mkempbuf(m1 - # avol[m2].data) + subarray(buf, n3, n)) else choose n1 with n1 < n ∧ is-aligned(n1, EB_PAGE_SIZE) in if n1 ≠ 0 then avol[m2] := mapped(avol[m2].data + mkempbuf(m1 - # avol[m2].data) + subarray(buf, n3, n1)) ifnone skip⟩ (avol = abs(avols[default-volid]) ∧ err1 = err)

Proof step 183 from proof refine-write (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information