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Proof step 2 from proof save-branches-last (previous step)

⊦ save(zbrar, m, nused + 1) = save(zbrar, m, nused)[m + nused, save(zbrar[m + nused])]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ save(zbrar, m, nused + 1) = save(zbrar, m + 1, nused)[m, save(zbrar[m])]
Proof step 4:
⊦ save(zbrar, m + 1, nused)[m, save(zbrar[m])] = save(zbrar, m, nused)[m + nused, save(zbrar[m + nused])]

Rule argument

spec: <toplevel> name: save-branches-rec seq: ⊦ save(zbrar, m, nused + 1) = save(zbrar, m + 1, nused)[m, save(zbrar[m])] subst: [nused, m, zbrar] → [nused, m, zbrar] flags: <all paths>

Additional information

Used terms: nused, m, zbrar