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Proof step 49 from proof refine-change (previous step)

m < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(n, EB_PAGE_SIZE), default-volid ∈ avols, n ≤ LEB_SIZE, n ≤ # buf, ⌊err1⌋ ⊦ ⟨err := err1; avol := abs(avols[default-volid]); if err = ESUCCESS then avol[m] := mapped(subarray(buf, 0, n))⟩ (avol = abs(avols[default-volid]) ∧ err1 = err)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 50:
err = err1, m < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(n, EB_PAGE_SIZE), default-volid ∈ avols, n ≤ # buf, n ≤ LEB_SIZE, ⌊err1⌋ ⊦ ⟨avol := abs(avols[default-volid]); if err = ESUCCESS then avol[m] := mapped(subarray(buf, 0, n))⟩ (avol = abs(avols[default-volid]) ∧ err1 = err)

Proof step 49 from proof refine-change (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information