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Proof step 3 from proof inv-sync (previous step)

afs-cons(dirs, files) ⊦ ⟪choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; asynced := err = ESUCCESS⟫ true

User applied rule choose right

And obtained the following new goals

Proof step 4:
afs-cons(dirs, files), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪err := err0; asynced := err = ESUCCESS⟫ true
Proof step 6:
afs-cons(dirs, files) ⊦ ∃ err0. ⌊err0⌋ ∨ err0 = ESUCCESS

Rule argument

pos: right 1

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