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Proof step 17 from proof synced-commit (previous step)

⟨ns := ns0; ns0 := ?⟩ (ns0 = ns2 ∧ adr0 = adr2 ∧ m0 = m2 ∧ [] = nx1 ∧ lpt0 = lpt2 ∧ ns = ns3 ∧ (isbuf ↔ isbuf0) ∧ err2 = err1), ⟨fail_or_success#(; ; err)⟩ (err = err2), # lpt3 = # avol, # lpt1 = # avol, adr = adr1, adr0 = adr3, err2 = ESUCCESS, lpt = lpt1, lpt0 = lpt3, m = m1, m0 = m3, ns = ns1, ns0 = ns4, awbuf-inv(avol, bleb), synced(avol), avol0 ↓ avol ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then {adr1 := adr3; m1 := m3; nx := []; lpt1 := lpt3; ns1 := ns4} else isbuf := true; ns4 := ?⟩ (adr2 = adr1 ∧ m2 = m1 ∧ nx1 = nx ∧ lpt2 = lpt1 ∧ ns3 = ns1), adr2 = adr1 ∧ m2 = m1 ∧ nx1 = nx ∧ lpt2 = lpt1 ∧ ns3 = ns1

Heuristic symbolic execution applied rule assign left

And obtained the following new goals

Proof step 18:
⟨ns1 := ?⟩ (ns1 = ns2 ∧ adr0 = adr2 ∧ m0 = m2 ∧ [] = nx1 ∧ lpt0 = lpt2 ∧ ns0 = ns3 ∧ (isbuf ↔ isbuf0) ∧ err2 = err1), ⟨fail_or_success#(; ; err)⟩ (err = err2), # lpt1 = # avol, # lpt3 = # avol, adr = adr1, adr0 = adr3, err2 = ESUCCESS, lpt = lpt1, lpt0 = lpt3, m = m1, m0 = m3, ns = ns1, ns0 = ns4, awbuf-inv(avol, bleb), synced(avol), avol0 ↓ avol ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then {adr1 := adr3; m1 := m3; nx := []; lpt1 := lpt3; ns1 := ns4} else isbuf := true; ns4 := ?⟩ (adr2 = adr1 ∧ m2 = m1 ∧ nx1 = nx ∧ lpt2 = lpt1 ∧ ns3 = ns1), adr2 = adr1 ∧ m2 = m1 ∧ nx1 = nx ∧ lpt2 = lpt1 ∧ ns3 = ns1

Proof step 17 from proof synced-commit (previous step)

Heuristic symbolic execution applied rule assign left

And obtained the following new goals

Rule argument

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