Definition same_except_cur (m m' : Mem.mem) :=
Mem.mem_contents m = Mem.mem_contents m' /\
max_access_at m = max_access_at m' /\
Mem.nextblock m = Mem.nextblock m'.

Lemma juicyRestrictCur_unchanged m phi
(coh : access_cohere' m phi)
(pres : forall loc, perm_of_res (phi @ loc) = access_at m loc Cur) :
Mem.mem_access (juicyRestrict coh) = Mem.mem_access m.