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Proof step 19 from proof crash-neutral-read-data (previous step)

# buf = n0 + n4 + n3, apebs[n6] = mkpeb(aehdr, avhdr, buf0, m, false), n6 < # apebs, ubi-io-inv(apebs), n5 + n3 ≤ LEB_SIZE, n4 + n3 ≤ # buf ⊦ # buf = # buf ∧ range=(buf, 0, buf, 0, n4) ∧ range=(buf, n4 + n3, buf, n4 + n3, n0) ∧ ⟨buf0 := buf⟩ true

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
# buf = n0 + n4 + n3, apebs[n6] = mkpeb(aehdr, avhdr, buf0, m, false), n6 < # apebs, ubi-io-inv(apebs), n5 + n3 ≤ LEB_SIZE, n4 + n3 ≤ # buf, n4 ≤ # buf ⊦ ⟨buf0 := buf⟩ true

Rule argument

Additional information

Used simplifier rules: ⊦ m + m0 < n → ¬ n + n0 < m; (s)% ⊦ m < n → n ≠ 0; (s)%fle-01: ⊦ m ≤ n ∧ n < n0 → m < n0; (forward) from specification nat%lf-02: ⊦ m < n ∧ m = n0 → n0 < n; (forward) from specification nat-basic%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic% ⊦ m ≤ n ↔ ¬ n < m; (ss)% ⊦ m ≤ m; (s)%c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ n + 0 = n; (s)% ⊦ range=(buf, n, buf, n, m) ↔ n + m ≤ # buf; (s)