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Proof step 28 from proof prepost-read-lebs (previous step)

# buf = (n2 + n1) * LEB_SIZE, avol[n3 + n1] = mapped(buf0), err = err0, n0 = n1 * LEB_SIZE, subarray(buf, 0, n1 * LEB_SIZE) = lebs(avol, n3, n1), n3 + n1 < # avol, ebm-vol-inv(avol), mapped-full?(avol, n3, n2 + n1), n3 + n2 + n1 ≤ # avol, n1 * LEB_SIZE + LEB_SIZE ≤ # buf, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪n := LEB_SIZE; choose buf1 with # buf1 = # buf ∧ range=(buf, 0, buf1, 0, n0) ∧ range=(buf, n0 + n, buf1, n0 + n, # buf - n0 + n) in buf := buf1; n := n1 + 1⟫ ( n ≤ n2 + n1 ∧ # buf = (n2 + n1) * LEB_SIZE ∧ (err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → subarray(buf, 0, n * LEB_SIZE) = lebs(avol, n3, n)) ∧ n1 < n), err = ESUCCESS, n2 = 0

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 29:
# buf = (n2 + n1) * LEB_SIZE, avol[n3 + n1] = mapped(buf0), err = err0, n = LEB_SIZE, n0 = n1 * LEB_SIZE, subarray(buf, 0, n1 * LEB_SIZE) = lebs(avol, n3, n1), n3 + n1 < # avol, ebm-vol-inv(avol), mapped-full?(avol, n3, n2 + n1), n1 * LEB_SIZE + LEB_SIZE ≤ # buf, n3 + n2 + n1 ≤ # avol, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪choose buf1 with # buf1 = # buf ∧ range=(buf, 0, buf1, 0, n0) ∧ range=(buf, n0 + n, buf1, n0 + n, # buf - n0 + n) in buf := buf1; n := n1 + 1⟫ ( n ≤ n2 + n1 ∧ # buf = (n2 + n1) * LEB_SIZE ∧ (err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → subarray(buf, 0, n * LEB_SIZE) = lebs(avol, n3, n)) ∧ n1 < n), err = ESUCCESS, n2 = 0

Proof step 28 from proof prepost-read-lebs (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information