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Proof step 1 from proof refine-unmap (conclusion)

m < # avol, avol = abs(avols[v]), ebm-vol-inv(avol), v ∈ avols, v = default-volid, ebm-cons(avols) ⊦ ⟪ebm_vol_unmap#(m, v; avols)⟫ ⟨ebm_avol_unmap#(m; avol)⟩ (avol = abs(avols[v]))

System applied rule normalize

And obtained the following new goals

Proof step 2:
avol = abs(avols[v]), v = default-volid, m < # avol, ebm-cons(avols), ebm-vol-inv(avol), v ∈ avols ⊦ ⟪ebm_vol_unmap#(m, v; avols)⟫ ⟨ebm_avol_unmap#(m; avol)⟩ (avol = abs(avols[v]))

Proof step 1 from proof refine-unmap (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

Additional information