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Proof step 3 from proof mk-last-01 (previous step)

⊦ mklist(a, m).last = a, m = 0

User applied rule structural induction

And obtained the following new goals

Proof step 4:
∀ a. mklist(a, m0).last = a ∨ m0 = 0 ⊦ m0 +1 = 0, mklist(a, m0 +1).last = a

Rule argument

indvar: m

Additional information

Used simplifier rules: nat freely generated by 0, +1;;