liquid-fixpoint-8.10.7: tests/pos/sets.fq

// constant Set_empty : (func(1, [int; Set_Set @(0)]))

constraint:
  env []
  lhs {v : Set_Set a_aTp | [(? Set_emp([v]))]}
  rhs {v : Set_Set a_aTp | [(v = Set_empty([0]))]}
  id 3 tag [2]