Record ret_assert : Type := {
 RA_normal: environ->mpred;
 RA_break: environ->mpred;
 RA_continue: environ->mpred;
 RA_return: option val -> environ->mpred
}.Record ret_assert : Type := {
 RA_normal: environ->mpred;
 RA_break: environ->mpred;
 RA_continue: environ->mpred;
 RA_return: option val -> environ->mpred
}.Record ret_assert : Type := {
 RA_normal: environ->mpred;
 RA_break: environ->mpred;
 RA_continue: environ->mpred;
 RA_return: option val -> environ->mpred
}.Record ret_assert : Type := {
 RA_normal: environ->mpred;
 RA_break: environ->mpred;
 RA_continue: environ->mpred;
 RA_return: option val -> environ->mpred
}.Record ret_assert : Type := {
 RA_normal: environ->mpred;
 RA_break: environ->mpred;
 RA_continue: environ->mpred;
 RA_return: option val -> environ->mpred
}.

Lemma modifiedvars_Slabel l c: modifiedvars (Slabel l c) = modifiedvars c.