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Proof step 50 from proof refine-read (previous step)

# buf2 = (n4 + n2) + n3, LEB_SIZE = n0 + n1, avols[default-volid][m2] = mapped(buf0, n1), n = n5 + n3, n3 < # buf2, n3 + n2 < # buf2, m2 < # avols[default-volid], n < # buf2, ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols, n3 ≤ n, n3 + n2 ≤ n, m1 + n2 ≤ LEB_SIZE, n1 ≤ LEB_SIZE ⊦ n4 + n2 = 0, buf2[n] = subarray(buf2, n3 + n2, n4)[n5 - n2], n4 = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 51:
# buf2 = (n4 + n2) + n3, LEB_SIZE = n0 + n1, avols[default-volid][m2] = mapped(buf0, n1), n5 < n4 + n2, m2 < # avols[default-volid], n3 + n2 < # buf2, n3 < # buf2, ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols, n1 ≤ LEB_SIZE, m1 + n2 ≤ LEB_SIZE, n2 ≤ n5 ⊦ buf2[n5 + n3] = subarray(buf2, n3 + n2, n4)[n5 - n2], n4 = 0

Rule argument

Additional information

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