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Proof step 10 from proof leq-leninv (previous step)

leninv(nσ) = ⌜n0⌝ , n0 = n1 +1, ⌜n⌝ < # nσ, n0 < nσ[n], stutf(nσ) ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
leninv(nσ) = ⌜n1⌝ + ⌜1⌝ , ⌜n⌝ < # nσ, n1 + 1 < nσ[n], stutf(nσ) ⊦

Rule argument

Additional information

Used simplifier rules: c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ ⌜m + n⌝ = ⌜m⌝ + ⌜n⌝ ; (s)% ⊦ m +1 = m + 1; (s)