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Proof step 13 from proof inv-read-data (previous step)

apebs[n6] = mkpeb(aehdr, avhdr, buf1, m, false), n6 < # apebs, ubi-io-inv(apebs), n5 + n3 ≤ LEB_SIZE, n4 + n3 ≤ # buf, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪choose buf1 with # buf1 = # buf ∧ range=(buf1, 0, buf, 0, n4) ∧ range=(buf1, n4 + n3, buf, n4 + n3, # buf - n4 + n3) in buf := buf1⟫ true, err0 = ESUCCESS

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 14:
# buf1 = # buf, apebs[n6] = mkpeb(aehdr, avhdr, buf0, m, false), n6 < # apebs, range=(buf1, 0, buf, 0, n4), range=(buf1, n4 + n3, buf, n4 + n3, # buf - n4 + n3), ubi-io-inv(apebs), n4 + n3 ≤ # buf, n5 + n3 ≤ LEB_SIZE, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪buf := buf1⟫ true, err0 = ESUCCESS
Proof step 15:
apebs[n6] = mkpeb(aehdr, avhdr, buf1, m, false), n6 < # apebs, ubi-io-inv(apebs), n4 + n3 ≤ # buf, n5 + n3 ≤ LEB_SIZE, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ err0 = ESUCCESS, ∃ buf1. # buf1 = # buf ∧ range=(buf1, 0, buf, 0, n4) ∧ range=(buf1, n4 + n3, buf, n4 + n3, # buf - n4 + n3)
Proof step 18:
apebs[n6] = mkpeb(aehdr, avhdr, buf1, m, false), n6 < # apebs, ubi-io-inv(apebs), n4 + n3 ≤ # buf, n5 + n3 ≤ LEB_SIZE, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ err0 = ESUCCESS, ∀ buf1. # buf1 = # buf → range=(buf1, 0, buf, 0, n4) → # buf ≥ n4 + n3

Proof step 13 from proof inv-read-data (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information