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Proof step 2 from proof inv-get (previous step)

# xs = xs_len, # xs < h, # ys = 0 ∨ # ys = h ⊦ ⟪caterpillar_get#(h, xs, ys; ; x)⟫ true

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
# xs < h, ys = [] ∨ # ys = h ⊦ ⟪caterpillar_get#(h, xs, ys; ; x)⟫ true

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0; (s)%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic% ⊦ # x = 0 ↔ x = []; (s)