| ⊦ ( ctrok(gs.fctr, gs.fwriters) ∧ writersOk(gs.bq, gs.pq, gs.fwriters) ∧ pendingOk(gs.bq, gs.pq) ∧ SFTrailing(gs.bq) ∧ readFOsOk(gs.rfo, gs.fwriters)) ∧ FLITLInv(gs, lsf(t), pcf(t)) ∧ (gs.bq(tid) ≠ [] ∧ gs.bq(tid).head = SF ∧ (∀ l. ¬ FO(tid) ∈ gs.pq(l))) ∧ gs0 = gs.bq:= gs.bq(tid := gs.bq(tid).tail) → ctrok(gs0.fctr, gs0.fwriters) ∧ writersOk(gs0.bq, gs0.pq, gs0.fwriters) ∧ pendingOk(gs0.bq, gs0.pq) ∧ SFTrailing(gs0.bq) ∧ readFOsOk(gs0.rfo, gs0.fwriters) |