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Proof step 5 from proof inos-greater-del (previous step)

∀ n0. n0 ∈ ri.inos → n0 < maxino ⊦ (ri -- key).inos < maxino

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
∀ n. inodekey(n) ∈ ri → n < maxino ⊦ (ri -- key).inos < maxino

Rule argument

Additional information

Used simplifier rules: inos-node-store-def: ⊦ n ∈ ri.inos ↔ inodekey(n) ∈ ri;