| ⊦ nounsharedextR(cren, cext, ren) ∧ Πok(ext, cext, ren, cren) ∧ frag(IOAut(Π(start, cstart), Π(step, cstep, ren, cren, ext, cext), Π(ext, cext, ren, cren)))(pcσ, pα) ∧ frag(IOAut(astart, astep, aext))(aσ, aα) ∧ cext !(πra(step, cstep, ren, cren, pcσ, pα)) ⊑ aext !(aα) → # repls(step, cstep, cren, ren, aren, cext, aext, pcσ, pα, aσ, aα) = # repla(step, cstep, cren, ren, aren, cext, aext, pcσ, pα, aσ, aα) + ⌜1⌝ |