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Proof step 4 from proof refine-remap (previous step)

avol = abs(avols[default-volid]), v = default-volid, m < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols ⊦ ⟪if m < # avols[v] then {ebm_vol_unmap#(m, v; avols); ebm_map#(v, m; avols; err)} else abort⟫ ⟨ebm_avol_remap#(m; avol; err0)⟩ (avol = abs(avols[default-volid]) ∧ err = err0)

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Rule argument

pos: right 1

Additional information