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Proof step 11 from proof refine-unmap (previous step)

avol = abs(avols[default-volid]), m < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols ⊦ ⟨if m < # avol then avol[m] := unmapped else abort⟩ (avol = abs(avols[default-volid][m, unmapped]))

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Proof step 12:
avol = abs(avols[default-volid]), m < # avols[default-volid], ebm-cons(avols), ebm-vol-inv(abs(avols[default-volid])), default-volid ∈ avols ⊦ ⟨avol[m] := unmapped⟩ (avol = abs(avols[default-volid][m, unmapped]))

Rule argument

pos: right 1

Additional information

Used simplifier rules: ⊦ # abs(evol) = # evol; (s)% ⊦ m < n ↔ ¬ n ≤ m; (ss)% ⊦ m < n → (n ≤ m ↔ false); (s)