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Proof step 43 from proof refine-change (previous step)

avol = abs(avols[default-volid]), 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, ⌊err0⌋ ⊦ ⟨if m < # avol ∧ n ≤ # buf ∧ n ≤ LEB_SIZE ∧ is-aligned(n, EB_PAGE_SIZE) then {fail_or_success#(; ; err); if err = ESUCCESS then avol[m] := mapped(subarray(buf, 0, n))} else abort⟩ (avol = abs(avols[default-volid]) ∧ err0 = err)

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Proof step 44:
avol = abs(avols[default-volid]), 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, ⌊err0⌋ ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then avol[m] := mapped(subarray(buf, 0, n))⟩ (avol = abs(avols[default-volid]) ∧ err0 = err)

Rule argument

pos: right 1

Additional information

Used simplifier rules: ⊦ # abs(evol) = # evol; (s)