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Proof step 8 from proof newrefs-three (previous step)

⊦ newref_list(3, st) = newref(st) ' + newref(st[newref(st) -- 0 ', noval]) ' + newref(st[newref(st) -- 0 ', noval][newref(st[newref(st) -- 0 ', noval]) -- 0 ', noval]) ', ∃ r, r0, r1. newref_list(3, st) = r ' + r0 ' + r1 ' ∧ newref(r1, st) ∧ newref(r, st) ∧ newref(r0, st) ∧ r ≠ r0 ∧ r ≠ r1 ∧ r0 ≠ r1

User applied rule weakening

And obtained the following new goals

Proof step 7:
⊦ newref_list(3, st) = newref(st) ' + newref(st[newref(st) -- 0 ', noval]) ' + newref(st[newref(st) -- 0 ', noval][newref(st[newref(st) -- 0 ', noval]) -- 0 ', noval]) '

Rule argument

[fmaposlist-arg: (pos: right 2)]

Additional information

[[CONCRETESIMPRULES : ()]]