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Proof step 20 from proof refine-change (previous step)

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

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 21:
LEB_SIZE = n0 + n, 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 ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; avol := abs(avols[default-volid]); if err = ESUCCESS then avol[m] := mapped(subarray(buf, 0, n))⟩ (avol = abs(avols[default-volid][m, mapped(subarray(buf, 0, n) + mkempbuf(n0), n)]) ∧ ESUCCESS = err)

Rule argument

pos: right 1

Additional information

Used simplifier rules: fail_or_success#(; ; ERR) {choose ERR0 with ⌊ERR0⌋ ∨ ERR0 = ESUCCESS in ERR := ERR0};