[isabelle] Showing that type 'int' is infinite

I have a subgoal of the form

  1. "~ (finite (UNIV :: int set))"

However, I can't find a corresponding theorem using find_theorems in Isabelle/HOL. Nor was find_theorems produce successful on the terms "card (UNIV :: int set)" or "setsum ?f (UNIV :: int set)".

What is the best way to prove this subgoal?


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