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Proof step 3 from proof is-encoded-emptypage (previous step)

is-encoded(rnd, emptypage) ⊦

User applied rule apply lemma

And obtained the following new goals

Proof step 4:
⊦ is-encoded-nonempty(rnd, buf) ↔ is-encoded-empty(rnd, buf) ∧ ¬ isempty(buf)
Proof step 5:
is-encoded-nonempty(rnd, emptypage) ↔ is-encoded-empty(rnd, emptypage) ∧ ¬ isempty(emptypage), is-encoded(rnd, emptypage) ⊦

Rule argument

spec: encoding-fixed-size-nonempty, inst: encoding-ref-node name: is-encoded-nonempty seq: ⊦ is-encoded-nonempty(rnd, buf) ↔ is-encoded-empty(rnd, buf) ∧ ¬ isempty(buf) subst: [rnd, buf] → [rnd, emptypage]

Additional information

Used terms: rnd, emptypage