theory genealogy_Genealogy_Grandparent_is_grandfather_or_grandmother_1
imports Why3.Why3
begin

why3_open "genealogy_Genealogy_Grandparent_is_grandfather_or_grandmother_1.xml"

why3_vc Grandparent_is_grandfather_or_grandmother
by (metis grandfather_def grandmother_def grandparent_def parent_def)

why3_end

end
