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Proof step 1 from proof refine-sync-device (conclusion)

avol = abs(avols[v]), ebm-vol-inv(avol), v ∈ avols, v = default-volid, ebm-cons(avols) ⊦ ⟪ebm_vol_sync_device#(avols; ; err)⟫ ⟨ebm_avol_sync_device#(avol; ; err0)⟩ (avol = abs(avols[v]) ∧ err = err0)

System applied rule normalize

And obtained the following new goals

Proof step 2:
avol = abs(avols[v]), v = default-volid, ebm-cons(avols), ebm-vol-inv(avol), v ∈ avols ⊦ ⟪ebm_vol_sync_device#(avols; ; err)⟫ ⟨ebm_avol_sync_device#(avol; ; err0)⟩ (avol = abs(avols[v]) ∧ err = err0)

Proof step 1 from proof refine-sync-device (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

Additional information