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Proof step 4 from proof crash-neutral-remap (previous step)

m < # avol, ebm-vol-inv(avol), avol ⊆ avol0 ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then avol[m] := mapped(mkbuf(0)) else {skip or avol[m] := unmapped}⟩ (avol ⊆ avol0)

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 5:
m < # avol, ebm-vol-inv(avol), avol ⊆ avol0 ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then avol[m] := mapped(mkbuf(0)) else {skip or avol[m] := unmapped}⟩ (avol ⊆ avol0)

Rule argument

pos: right 1

Additional information

Used simplifier rules: fail_or_success#(; ; ERR) {choose ERR0 with ⌊ERR0⌋ ∨ ERR0 = ESUCCESS in ERR := ERR0};