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Proof step 2 from proof restr-empty-notin (previous step)

as | n = ∅, @(n, m0, m1) ∈ as ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
as | n = ∅, @(n, m0, m1) ∈ as ⊦ # as = 0, as = ∅

Rule argument

Additional information

Used simplifier rules: size-zero-01: ⊦ as ≠ ∅ → # as ≠ 0; (forward) from specification set-basic[node-store]%ne-01: ⊦ adr ∈ as → as ≠ ∅; (forward) from specification set-basic[node-store]