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Proof step 27 from proof refine-change (previous step)

LEB_SIZE = n0 + n, avol = abs(avols[default-volid]), err = ESUCCESS, 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 ⊦ ⟨avol[m] := mapped(subarray(buf, 0, n))⟩ (avol = abs(avols[default-volid][m, mapped(subarray(buf, 0, n) + mkempbuf(n0), n)]) ∧ ESUCCESS = err)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 28:
LEB_SIZE = n0 + n, avol = abs(avols[default-volid]), err = ESUCCESS, m < # avol, m < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), is-aligned(n, EB_PAGE_SIZE), default-volid ∈ avols, 0 + n ≤ # buf, n ≤ LEB_SIZE, n ≤ # buf ⊦ avol[m, mapped(subarray(buf, 0, n))] = abs(avols[default-volid][m, mapped(subarray(buf, 0, n) + mkempbuf(n0), n)]) ∧ ESUCCESS = err

Rule argument

Additional information

Used simplifier rules: ⊦ # abs(evol) = # evol; (s)% ⊦ n + 0 = n; (s)%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic%c: ⊦ m + n = n + m; from specification nat-basic