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Proof step 30 from proof synced-remap (previous step)

⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0⟩ (err = err2), # lpt = # avol, m2 < # avol, awbuf-inv(avol, bleb), synced(avol), avol0 ↓ avol[m2, unmapped] ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then avol[m2] := mapped(mkbuf(0)) else {skip or avol[m2] := unmapped}⟩ (synced(avol) ∧ avol0 ↓ avol), buffered(m2) = bleb, err2 = ESUCCESS, avol0[m2] ↓ avol[m2]

Heuristic symbolic execution applied rule choose left

And obtained the following new goals

Proof step 31:
⟨err := err0⟩ (err = err2), # lpt = # avol, m2 < # avol, awbuf-inv(avol, bleb), synced(avol), avol0 ↓ avol[m2, unmapped], ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then avol[m2] := mapped(mkbuf(0)) else {skip or avol[m2] := unmapped}⟩ (synced(avol) ∧ avol0 ↓ avol), buffered(m2) = bleb, err2 = ESUCCESS, avol0[m2] ↓ avol[m2]

Proof step 30 from proof synced-remap (previous step)

Heuristic symbolic execution applied rule choose left

And obtained the following new goals

Rule argument

Additional information