Goal:
  
  G1 : t
  G2 : t
  __view_subject_4_ : VSet.Subset (V G1) (V G2)
  __view_subject_5_ : EdgeSet.Subset (E G1) (E G2)
  __view_subject_6_ : s G1 = s G2
  h : VSet.For_all
        (fun x : VSet.elt =>
         VSet.for_all (fun y : VSet.elt => lsp G1 x y == lsp G2 x y) (V G1) =
         true) (V G1)
  ============================
   (full_subgraph G1 G2)


DEBUG:Going to execute:
<coq-core.plugins.ssreflect::ssrtclintros@0> arg
DEBUG LTAC Evaluated term: VSet.for_all_spec
DEBUG LTAC Evaluated term: (iffLR
                              (Q:=VSet.For_all
                                    (fun x : VSet.elt =>
                                     (fun x0 : VSet.elt =>
                                      VSet.for_all
                                        (fun y : VSet.elt =>
                                         lsp G1 x0 y == lsp G2 x0 y) 
                                        (V G1)) x = true) 
                                    (V G1))
                              (VSet.for_all_spec (V G1)
                                 (f:=fun x : VSet.elt =>
                                     VSet.for_all
                                       (fun y : VSet.elt =>
                                        lsp G1 x y == lsp G2 x y) 
                                       (V G1)) ?p) _view_subject_)