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Proof step 6 from proof unmodified-clean-fwd-zbrar (previous step)

# zbrar0 = BRANCH_SIZE, BRANCH_SIZE = # zbrar1, iast[adr] = indexnode(save(zbrar1, 0, nused), bv, nused), zbrar0[n] = mkzbranch(key, adr0, r2), indexnode(save(zbrar1, 0, nused), bv, nused) = save(mkznode(rp0, zbrar0, bv, false, nused)), n < BRANCH_SIZE, n < nused, adr ∈ iast, nused ≤ BRANCH_SIZE ⊦ ∃ r0. zbrar1[n] = mkzbranch(key, adr0, r0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 7:
⊦ save(znd) = indexnode(save(znd.zbranches, 0, znd.usedsize), znd.leaf, znd.usedsize)
Proof step 8:
# zbrar0 = BRANCH_SIZE, BRANCH_SIZE = # zbrar1, zbrar0[n] = mkzbranch(key, adr0, r2), iast[adr] = indexnode(save(zbrar1, 0, nused), bv, nused), indexnode(save(zbrar1, 0, nused), bv, nused) = indexnode (save(mkznode(rp0, zbrar0, bv, false, nused).zbranches, 0, mkznode(rp0, zbrar0, bv, false, nused).usedsize), mkznode(rp0, zbrar0, bv, false, nused).leaf, mkznode(rp0, zbrar0, bv, false, nused).usedsize), n < nused, n < BRANCH_SIZE, adr ∈ iast, nused ≤ BRANCH_SIZE ⊦ ∃ r0. zbrar1[n] = mkzbranch(key, adr0, r0)

Rule argument

spec: znode-ops name: save-node seq: ⊦ save(znd) = indexnode (save(znd.zbranches, 0, znd.usedsize), znd.leaf, znd.usedsize) subst: [znd] → [mkznode(rp0, zbrar0, bv, false, nused)] flags: <all paths>

Additional information

Used terms: mkznode(rp0, zbrar0, bv, false, nused)