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Proof step 9 from proof decode-contract (previous step)

err = ESUCCESS, err = ESUCCESS → is-encoded(a, subarray(buf, n, encoding-size(a))) ∧ n + encoding-size(a) ≤ # buf ∧ n0 = encoding-size(a), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪n0 := align↑(n0, ENCODED_ELEM_ALIGNMENT); if ¬ n + n0 ≤ # buf then err := EINVAL⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT)))

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 10:
err = ESUCCESS, n0 = align↑(n1, ENCODED_ELEM_ALIGNMENT), err = ESUCCESS → is-encoded(a, subarray(buf, n, encoding-size(a))) ∧ n + encoding-size(a) ≤ # buf ∧ n1 = encoding-size(a), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪if ¬ n + n0 ≤ # buf then err := EINVAL⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT)))

Proof step 9 from proof decode-contract (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information