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Proof step 7 from proof decode-contract (previous step)

⊦ ∀ a, n0, err. (err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → is-encoded(a, subarray(buf, n, encoding-size(a))) ∧ n + encoding-size(a) ≤ # buf ∧ n0 = encoding-size(a)) → ⟪if err = ESUCCESS then {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 simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
err = ESUCCESS → is-encoded(a, subarray(buf, n, encoding-size(a))) ∧ n + encoding-size(a) ≤ # buf ∧ n0 = encoding-size(a), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪if err = ESUCCESS then {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)))

Proof step 7 from proof decode-contract (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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