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Proof step 2 from proof to-unwind-end-fin (previous step)

m < # x ⊦ x to m + 1 = (x to m) + x[m] ', x = []

User applied rule structural induction

And obtained the following new goals

Proof step 3:
m < #(a + x0), ∀ m. m < # x0 → x0 to m + 1 = (x0 to m) + x0[m] ' ∨ x0 = [] ⊦ a + x0 = [], a + x0 to m + 1 = (a + x0 to m) + (a + x0)[m] '

Rule argument

indvar: x

Additional information

Used simplifier rules: list freely generated by [], +;;