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Proof step 5 from proof recovery (previous step)

avols = avols0, ebm-cons(avols1), ebm-cons(avols0), ebm-vol-inv(abs(avols1[default-volid])), default-volid ∈ avols1, avols1 ⊆ avols0 ⊦ ⟪fail_or_success#(; ; err); if err ≠ ESUCCESS then avols := ?; v := default-volid⟫ ( (err = ESUCCESS → (∃ avol. abs(avols1[default-volid]) ⊆ avol ∧ ⟨ebm_avol_recover#(; avol; err0)⟩ (avol = abs(avols[v]) ∧ ESUCCESS = err0))) ∧ (err ≠ ESUCCESS → (∀ avol. ⟨ebm_avol_recover#(; avol1; err0)⟩ (avol = avol1 ∧ err = err0))))

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 6:
avols = avols0, ebm-cons(avols0), ebm-cons(avols1), ebm-vol-inv(abs(avols1[default-volid])), default-volid ∈ avols1, avols1 ⊆ avols0 ⊦ ⟪choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err ≠ ESUCCESS then avols := ?; v := default-volid⟫ ( (err = ESUCCESS → (∃ avol. abs(avols1[default-volid]) ⊆ avol ∧ ⟨ebm_avol_recover#(; avol; err0)⟩ (avol = abs(avols[v]) ∧ ESUCCESS = err0))) ∧ (err ≠ ESUCCESS → (∀ avol. ⟨ebm_avol_recover#(; avol1; err0)⟩ (avol = avol1 ∧ err = err0))))

Rule argument

pos: right 1

Additional information

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