Goal:
  
  ============================
   (forall x y : VSet.E.t,
    reflectProp (x = y)
      ((fun x0 y0 : VSet.E.t =>
        match VSet.E.compare x0 y0 with
        | Eq => true
        | _ => false
        end) x y))


DEBUG:Going to execute:
<coq-core.plugins.ssreflect::ssrmove@1> $1 $2