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Proof step 4 from proof inv-recover (previous step)

# lpt2 = # avol1, adr0 = adr1, avol = avol0, lpt = lpt2, lpt0 = lpt1, m0 = m1, ns0 = ns1, ebm-vol-inv(avol1), avol1 ⊆ avol0 ⊦ ⟪fail_or_success#(; ; err); if err = ESUCCESS then adr0 := adr, m0 := m, log := plog, lpt0 := lpt, ns0 := ns else avol := ?, adr := ?, m := ?, plog := ?, lpt := ?, adr0 := ?, m0 := ?, log := ?, lpt0 := ?, ns0 := ?, ns := ?⟫ (err = ESUCCESS → ebm-vol-inv(avol) ∧ # lpt = # avol)

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 5:
# lpt2 = # avol1, adr0 = adr1, avol = avol0, lpt = lpt2, lpt0 = lpt1, m0 = m1, ns0 = ns1, ebm-vol-inv(avol1), avol1 ⊆ avol0 ⊦ ⟪choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then adr0 := adr, m0 := m, log := plog, lpt0 := lpt, ns0 := ns else avol := ?, adr := ?, m := ?, plog := ?, lpt := ?, adr0 := ?, m0 := ?, log := ?, lpt0 := ?, ns0 := ?, ns := ?⟫ (err = ESUCCESS → ebm-vol-inv(avol) ∧ # lpt = # avol)

Rule argument

pos: right 1

Additional information

Used simplifier rules: fail_or_success#(; ; ERR) {choose ERR0 with ⌊ERR0⌋ ∨ ERR0 = ESUCCESS in ERR := ERR0};