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Proof step 6 from proof inv-unmap (previous step)

m < # avols[default-volid], ebm-cons(avols), default-volid ∈ avols ⊦ ⟪ebm_unmap#(default-volid, m; avols)⟫ (default-volid ∈ avols ∧ ebm-cons(avols))

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 7:
v = default-volid, m < # avols[default-volid], ebm-cons(avols), default-volid ∈ avols ⊦ ⟪if v ∈ avols ∧ m < # avols[v] then avols[v][m] := unmapped else abort⟫ (default-volid ∈ avols ∧ ebm-cons(avols))

Rule argument

pos: right 1

Additional information

Used simplifier rules: ebm_unmap#(VOLID, LNUM; AVOLS) {if VOLID ∈ AVOLS ∧ LNUM < # AVOLS[VOLID] then AVOLS[VOLID][LNUM] := unmapped else abort };