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Proof step 31 from proof encode-contract (previous step)

# buf1 = # buf, subarray(buf1, n + encoding-size(a), # buf - n + encoding-size(a)) = subarray(buf, n + encoding-size(a), # buf - n + encoding-size(a)), subarray(buf1, 0, n) = subarray(buf, 0, n), n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf, n + encoding-size(a) ≤ # buf, err = ESUCCESS → is-encoded(a, subarray(buf1, n, encoding-size(a))) ∧ n0 = encoding-size(a), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪skip⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf1, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT))), err = ESUCCESS

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)