| ⊦ n ∈ gstore ∧ ¬ n ∈ ginval ∧ gstore[n].gndlist = gndx0 ∧ gstore[n].ladrlist = lax0 ∧ # gndx0 = # lax0 ∧ # gndx1 = # lax1 ∧ ¬ dups(lax0 + lax1) ∧ transaction(ndx, gndx1) → nodes-cons(lax1.to-adr(n), ndx, gstore[n, groupblock(gndx0 + gndx1, lax0 + lax1, m)], ginval) |