Bind Scope logic with assert.
Definition funspec := (list var * assert)%type.
Definition funspecs := table adr funspec.
Definition call (P: list var * assert) (vl: list adr) : mpred :=
(!! (length vl = length (fst P)) && snd P (arguments (fst P) vl)).
Parameter cont: forall (nP: funspec)  (v: adr), mpred.
Definition funassert (G: funspecs) : mpred :=
(ALL  i:_, ALL P:_,  !! (table_get G i = Some P) --> cont P i)  &&
(ALL  i:_, ALL P:_,  cont P i --> !! exists P', table_get G i = Some P').

Axiom funassert_get:
forall G v nP,  funassert  G && cont nP v |--
EX P':assert, (ALL vl:list adr, |> ! (call nP vl <=> call (fst nP,P') vl)) && !! (table_get G v = Some (fst nP,P')).