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Proof step 1 from proof mk-rest-01 (conclusion)

⊦ m ≠ 0 → (mklist(a, m) + x).rest = mklist(a, m -1) + x

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ m = 0, (mklist(a, m) + x).rest = mklist(a, m - 1) + x

Rule argument

Additional information

Used simplifier rules: pred-03: ⊦ n -1 = n - 1; from specification nat