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Proof step 5 from proof unmodified-payload (previous step)

BRANCH_SIZE = # zbrar, iast[adr] = indexnode(brar, bv1, nused), indexnode(brar, bv1, nused) = save(mkznode(rp, zbrar, bv1, false, nused)), sorted(zbrar, 0, nused), adr ∈ iast, nused ≤ BRANCH_SIZE ⊦ ∀ key. (key ∈ payload(load(brar, 0, nused), 0, nused) ↔ key ∈ payload(zbrar, 0, nused)) ∧ (key ∈ payload(load(brar, 0, nused), 0, nused) → payload(load(brar, 0, nused), 0, nused)[key] = payload(zbrar, 0, nused)[key])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
BRANCH_SIZE = # zbrar, iast[adr] = indexnode(brar, bv1, nused), indexnode(brar, bv1, nused) = save(mkznode(rp, zbrar, bv1, false, nused)), sorted(zbrar, 0, nused), adr ∈ iast, nused ≤ BRANCH_SIZE ⊦ (key ∈ payload(load(brar, 0, nused), 0, nused) ↔ key ∈ payload(zbrar, 0, nused)) ∧ (key ∈ payload(load(brar, 0, nused), 0, nused) → payload(load(brar, 0, nused), 0, nused)[key] = payload(zbrar, 0, nused)[key])

Proof step 5 from proof unmodified-payload (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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