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Proof step 57 from proof maxpath-array (previous step)

st[r -- i '] = refval(r0), is_array(str, r, st), i < st[r -- _length] .intval, 0 ≤ i, validrefs(str, r ' + refs0, st[r -- _type] .type, st), 0 < st[r -- _length] .intval, ∀ refs. ¬ refs ∈ validrefset(str, r, st) ⊦ cyclic(str, r, st), junkref(str, r, st), has_reffield((r ' + refs0) .last, st), dups(refs0), r ∈ refs0

User applied rule all left

And obtained the following new goals

Proof step 56:
st[r -- i '] = refval(r0), is_array(str, r, st), i < st[r -- _length] .intval, 0 ≤ i, validrefs(str, r ' + refs0, st[r -- _type] .type, st), 0 < st[r -- _length] .intval, ¬ r ' + refs0 ∈ validrefset(str, r, st) ⊦ cyclic(str, r, st), junkref(str, r, st), has_reffield((r ' + refs0) .last, st), dups(refs0), r ∈ refs0

Rule argument

[EXRARG : pos: left 7, [extquanttermlist: (r ' + refs0) abort:F , discard:T , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r ' + refs0)]]