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Proof step 5 from proof spawn-rg-total-correct-strng (
previous step
)
□ (Rton(n)(S', S'') ∧ GInv(S) ∧ GInv(S')), [:Inpf, S, Outf | SPAWN#(n; Inpf, S, Outf)], GInv(S'') -+-> (Gton(n)(S, S') ∧ ¬ blocked), GInit(S) ⊦ ◇ last, □ GInv(S'')
User applied rule weakening
And obtained the following new goals
Proof step 6
:
□ (Rton(n)(S', S'') ∧ GInv(S) ∧ GInv(S')) ⊦ ◇ last, □ GInv(S'')
Rule argument
poslist: left 2, left 3, left 4
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