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

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

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Proof step 5:
m < # avol, ebm-vol-inv(avol) ⊦ ⟪fail_or_success#(; ; err); if err = ESUCCESS then avol[m] := mapped(mkbuf(0)) else {skip or avol[m] := unmapped}⟫ ebm-vol-inv(avol)

Rule argument

pos: right 1

Additional information

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