Definition env_mapsto: forall {key A}{KE: EqDec key} (id: key) (sh: Share.t) (v: A) , pred (env key A) := @_env_mapsto.

Lemma env_mapsto_exists{key A}{KE: EqDec key}: forall id sh (v: A), exists rho, _env_mapsto id (pshare_sh sh) v rho.