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Theorem step-absstep-M1-M2-tau-same

# gs.ar ≠ 0 ∧ htok(gs.ar), # gs0.ar ≠ 0 ∧ htok(gs0.ar), lsf(tid) = ls, lsf0(tid) = ls0, alsf(tid) = als, alsf(tid).tid = tid, lsf(tid).tid = tid, ∀ tid0. tid0 ≠ tid → lsf(tid0).tid = tid0, ∀ tid0. tid0 ≠ tid → alsf(tid0).tid = tid0, pcf(tid) = M1, pcf0(tid) = M2, apcf(tid) = apc, ls.e ≠ ⊥, ls0.e ≠ ⊥ ∧ ls0.sz = # gs0.ar, SetLInv(ags, als, apc), ∀ tid0. tid0 ≠ tid → HashsetLInv(gs, lsf(tid0), pcf(tid0)) ∧ SetLInv(ags, alsf(tid0), apcf(tid0)) ∧ labs(gs, lsf(tid0), pcf(tid0), ags, alsf(tid0), apcf(tid0)), pre(gs, ls, M1, τ) ∧ gs0 = gstepf(gs, ls, M1, τ) ∧ ls0 = lstepf(gs, ls, M1, τ) ∧ M2 = pcstepf(gs, ls, M1, τ), absset(gs.ar, ags.set), ls.tid = als.tid ∧ apc = invMember ∧ (apc = invMember ∨ apc = invInsert → ls.e = als.le) ⊦ absset(gs0.ar, ags.set) ∧ ls0.tid = als.tid ∧ apc = invMember ∧ (apc = invMember ∨ apc = invInsert → ls0.e = als.le)

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