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Proof step 25 from proof btree-clean-fwd-strong (previous step)

((bnode(r2, zbrar0, 0, nused, nused, height + 1, false, ri0, iast0, alladrs0 -- adr, alladrs0 -- adr) * P0))(zh), ((bnode(r, zbrar, 0, nused, nused, height0 + 1, false, ri1, iast1, alladrs1 -- adr, alladrs1 -- adr) * P1))(zh3), ((r2 => mkznode(rp0, zbrar0, false, false, nused)))(zh5), ((r => mkznode(rp1, zbrar, false, false, nused)))(zh4), nsize(nused, nstat), unmodified(adr, mkznode(rp1, zbrar, false, false, nused), iast1), unmodified(adr, mkznode(rp0, zbrar0, false, false, nused), iast0), adr ∈ iast1, adr ∈ alladrs1, adr ∈ iast0, adr ∈ alladrs0, alladrs1 ⊆ dom iast1, alladrs0 ⊆ dom iast0, iast0 ⊆ iast1, zh5 ⊥ zh, zh4 ⊥ zh3, (r0 = null ⊃ P0(zh0);r2 = r0 ∧ zh5 ∪ zh = zh0), (r1 = null ⊃ P1(zh1);r = r1 ∧ zh4 ∪ zh3 = zh1), ∀ rp1, r1, adr, height1, ri1, iast1, alladrs1, nstat, P1, zh1, rp0, r0, ri0, iast0, alladrs0, P0, zh0. ((btree(rp1, r1, adr, height1, false, ri1, iast1, alladrs1, alladrs1, nstat) * P1))(zh1) ∧ ((btree(rp0, r0, adr, height, false, ri0, iast0, alladrs0, alladrs0, nstat) * P0))(zh0) ∧ alladrs1 ⊆ dom iast1 ∧ alladrs0 ⊆ dom iast0 ∧ iast0 ⊆ iast1 → height = height1 ∧ ri0 = ri1 ∧ alladrs0 = alladrs1 ⊦ # alladrs1 = 0, # alladrs0 = 0, alladrs0 = ∅, alladrs1 = ∅, height = height0 ∧ ri0 = ri1 ∧ alladrs0 = alladrs1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 26:
⊦ bnode(rp, zbrar, m, len, nused, height + 1, dirty, ri, iast, as, alladrs) = ( ⌜m + len ≤ nused ∧ nused ≤ # zbrar ∧ # zbrar = BRANCH_SIZE⌝ ∧ ⌜nused ≠ 0 ∧ sorted(zbrar, 0, nused - 1)⌝ ∧ _∃ (λ asar. _∃ (λ asar0. ⌜ # asar = nused ∧ disj(asar, 0, nused) ∧ union(asar, m, len) = as ∧ # asar0 = nused ∧ disj(asar0, 0, nused) ∧ union(asar0, m, len) = alladrs ⌝ ∧ (λ n. ⌜zbrar[n].branch?⌝ ∧ btree(rp, zbrar[n].child, zbrar[n].adr, height, dirty, key-range(zbrar, n, nused, ri), iast, asar[n], asar0[n], ok) )⊗_ (m, len ))))
Proof step 27:
((bnode(r, zbrar, 0, nused, nused, height0 + 1, false, ri1, iast1, alladrs1 -- adr, alladrs1 -- adr) * P1))(zh3), (( ( ⌜0 + nused ≤ nused ∧ nused ≤ # zbrar0 ∧ # zbrar0 = BRANCH_SIZE⌝ ∧ ⌜nused ≠ 0 ∧ sorted(zbrar0, 0, nused - 1)⌝ ∧ _∃ (λ asar. _∃ (λ asar0. ⌜ # asar = nused ∧ disj(asar, 0, nused) ∧ union(asar, 0, nused) = alladrs0 -- adr ∧ # asar0 = nused ∧ disj(asar0, 0, nused) ∧ union(asar0, 0, nused) = alladrs0 -- adr ⌝ ∧ (λ n. ⌜zbrar0[n].branch?⌝ ∧ btree(r2, zbrar0[n].child, zbrar0[n].adr, height, false, key-range(zbrar0, n, nused, ri0), iast0, asar[n], asar0[n], ok) )⊗_ (0, nused )))) * P0) )(zh), ((r => mkznode(rp1, zbrar, false, false, nused)))(zh4), ((r2 => mkznode(rp0, zbrar0, false, false, nused)))(zh5), nsize(nused, nstat), unmodified(adr, mkznode(rp0, zbrar0, false, false, nused), iast0), unmodified(adr, mkznode(rp1, zbrar, false, false, nused), iast1), adr ∈ alladrs0, adr ∈ iast0, adr ∈ alladrs1, adr ∈ iast1, iast0 ⊆ iast1, alladrs0 ⊆ dom iast0, alladrs1 ⊆ dom iast1, zh4 ⊥ zh3, zh5 ⊥ zh, (r1 = null ⊃ P1(zh1);r = r1 ∧ zh4 ∪ zh3 = zh1), (r0 = null ⊃ P0(zh0);r2 = r0 ∧ zh5 ∪ zh = zh0), ∀ rp1, r1, adr, height1, ri1, iast1, alladrs1, nstat, P1, zh1, rp0, r0, ri0, iast0, alladrs0, P0, zh0. ((btree(rp1, r1, adr, height1, false, ri1, iast1, alladrs1, alladrs1, nstat) * P1))(zh1) ∧ ((btree(rp0, r0, adr, height, false, ri0, iast0, alladrs0, alladrs0, nstat) * P0))(zh0) ∧ alladrs1 ⊆ dom iast1 ∧ alladrs0 ⊆ dom iast0 ∧ iast0 ⊆ iast1 → height = height1 ∧ ri0 = ri1 ∧ alladrs0 = alladrs1 ⊦ # alladrs0 = 0, # alladrs1 = 0, alladrs0 = ∅, alladrs1 = ∅, height = height0 ∧ ri0 = ri1 ∧ alladrs0 = alladrs1

Rule argument

spec: <toplevel> name: bnode seq: ⊦ bnode (rp, zbrar, m, len, nused, height + 1, dirty, ri, iast, as, alladrs) = ( ⌜ m + len ≤ nused ∧ nused ≤ # zbrar ∧ # zbrar = BRANCH_SIZE ⌝ ∧ ⌜nused ≠ 0 ∧ sorted(zbrar, 0, nused - 1)⌝ ∧ _∃ (λ asar. _∃ (λ asar0. ⌜ # asar = nused ∧ disj(asar, 0, nused) ∧ union(asar, m, len) = as ∧ # asar0 = nused ∧ disj(asar0, 0, nused) ∧ union(asar0, m, len) = alladrs ⌝ ∧ (λ n. ⌜zbrar[n].branch?⌝ ∧ btree (rp, zbrar[n].child, zbrar[n].adr, height, dirty, key-range(zbrar, n, nused, ri), iast, asar[n], asar0[n], ok) )⊗_ (m, len )))) subst: [alladrs, as, iast, ri, dirty, height, nused, len, m, zbrar, rp] → [alladrs0 -- adr, alladrs0 -- adr, iast0, ri0, false, height, nused, nused, 0, zbrar0, r2] flags: <all paths>

Additional information

Used terms: alladrs0 -- adr, alladrs0 -- adr, iast0, ri0, false, height, nused, nused, 0, zbrar0, r2