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Proof step 15 from proof unchanged-cyclic (previous step)

cyclic(str, r, st), unchanged(str, r, st, st0) ⊦ junkref(str, r, st), ∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, st0[r -- _type] .type, st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
cyclic(str, r, st), unchanged(str, r, st, st0) ⊦ junkref(str, r, st), ∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, st0[refs .first -- _type] .type, st0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]