fact: Fixpoint leftmost_path_length (t: poly_type) := match t with | poly_var x => 0 | poly_arr s t => 1 + leftmost_path_length s | poly_abs t => leftmost_path_length t end.
imports: List Lia Relation_Definitions Relation_Operators Operators_Properties Undecidability.SystemF.SysF Undecidability.SystemF.Autosubst.syntax Undecidability.SystemF.Autosubst.unscoped Undecidability.SystemF.Util(Facts poly_type_facts pure_term_facts term_facts typing_facts iipc2_facts pure_typing_facts) ssreflect ssrbool ssrfun