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Proof step 15 from proof cyclic-put-badarrayfield (previous step)

r1 ∈ refs, validrefs(str, refs + r1 ', st[refs .first -- _type] .type, st), is_arraytype(st[r0 -- _type] .type) ⊦ fs ' = _type, fs ' = _length, junkref(str, refs .first, st), dups(refs), ∃ refs0, r. ¬ dups(refs0) ∧ r ∈ refs0 ∧ refs0 .first = refs .first ∧ validrefs(str, refs0 + r ', st[refs .first -- _type] .type, st[r0 -- fs ', val])

User applied rule exists right

And obtained the following new goals

Proof step 14:
r1 ∈ refs, validrefs(str, refs + r1 ', st[refs .first -- _type] .type, st), is_arraytype(st[r0 -- _type] .type) ⊦ fs ' = _type, fs ' = _length, junkref(str, refs .first, st), dups(refs), ¬ dups(refs) ∧ r1 ∈ refs ∧ refs .first = refs .first ∧ validrefs(str, refs + r1 ', st[refs .first -- _type] .type, st[r0 -- fs ', val])

Rule argument

[EXRARG : pos: right 5, [extquanttermlist: (refs, r1)abort:F, discard:T, computed:T]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (refs, r1)]]