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Proof step 2 from proof spawn-sat-rg (
previous step
)
[:Inpf, S, Outf | SPAWN#(n; Inpf, S, Outf)], GInv(S), Prton(n)(S) ⊦ (Rton(n)(S', S'') ∧ (GInv(S') → GInv(S''))) -+-> (last ⊃ Poton(n)(S) ∧ GInv(S);Gton(n)(S, S') ∧ ¬ blocked ∧ (GInv(S) → GInv(S')))
Lemma
spawn-sat-rg-strnger