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Proof step 20 from proof inv-write (previous step)

err0 = ESUCCESS, m2 < # avols[default-volid], ebm-cons(avols), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), default-volid ∈ avols, n + n2 ≤ # buf, m1 + n ≤ LEB_SIZE, avols[default-volid][m2].mapped? → avols[default-volid][m2].fill ≤ m1, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ [avols[default-volid][m2] := mapped(mkempbuf(m1) + subarray(buf, n2, n) + mkempbuf(LEB_SIZE - m1 - n), m1 + n)] (ebm-cons(avols) → default-volid ∈ avols), avols[default-volid][m2].mapped?

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ n ≥ m ↔ m ≤ n; (s)% ⊦ m ≤ n ↔ ¬ n < m; (ss)% ⊦ m ≤ n → (n < m ↔ false); (s)%n0 ≤ n ⊦ m ≤ n - n0 ↔ m + n0 ≤ n; (s)% ⊦ v ∈ avols[v0, evol] ↔ v = v0 ∨ v ∈ avols; (ws)