| adr ∈ referenced-adrs(ax0, ri), adr0 ∈ ri, ∀ adr, ri. adr ∈ referenced-adrs(ax0, ri) ↔ adr ∈ ax0 ∧ adr ∈ ri ⊦ adr = adr0, adr ∈ ax0, adr ∈ ax0 ∧ adr ∈ ri |
adr0 ∈ ri, adr ∈ referenced-adrs(ax0, ri), ∀ adr, ri. adr ∈ referenced-adrs(ax0, ri) ↔ adr ∈ ax0 ∧ adr ∈ ri ⊦ adr = adr0, adr ∈ ax0