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Proof step 2 from proof size-inf-to (previous step)

∀ nf. #(nf to n0) = n0 ⊦ #(nf to n0 +1) = n0 +1

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
∀ nf. #(nf to n0) = n0 ⊦ #(nf to n0 + 1) = n0 + 1

Rule argument

Additional information

Used simplifier rules: succ: ⊦ m +1 = m + 1; from specification nat-basic2