diff --git a/model_with_structures/analyzer.ml b/model_with_structures/analyzer.ml
index bf190f4..a70b099 100644
--- a/model_with_structures/analyzer.ml
+++ b/model_with_structures/analyzer.ml
@@ -201,9 +201,9 @@ struct
                                let (mem'', id'') = mem_add mem' v' in
                                (mem'', RefV id'') 
     | TupleT ts, TupleV vs -> let folder = fun (mem, vs') v t -> let (mem', v') = valcopy mem v t in
-                                                                 (mem, v' :: vs') in 
+                                                                 (mem', v' :: vs') in 
                               let mem', vs' = List.fold_left2 folder (mem, []) vs ts in
-                              (mem', TupleV vs')
+                              (mem', TupleV (List.rev vs')) (* TODO: FIXME: should reverse or not ?? *)
     | _, _ -> raise @@ Typing_error "valcopy: not trivial value, wrong type"
 
   (* - value update *)
@@ -433,6 +433,7 @@ struct
   (* - shortcuts *)
 
   let ( #. ) x y = SeqS (x, y)
+  let ( |. ) x y = ChoiceS (x, y)
 
   let v0 = VarP 0
   let v1 = VarP 1
@@ -452,6 +453,8 @@ struct
   let vg6 = VarP (globals_min_id + 6)
   let vg7 = VarP (globals_min_id + 7)
   let vg8 = VarP (globals_min_id + 8)
+  let vg9 = VarP (globals_min_id + 9)
+  let vg10 = VarP (globals_min_id + 10)
 
   let rf0E = RefE 0
   let rf1E = RefE 1
@@ -475,7 +478,7 @@ struct
   let pE p = PathE p
 
   let drf p = DerefP p
-  let access p i = AccessP (p, i)
+  let access i p = AccessP (p, i)
 
   let wr x = ReadS x 
   let rd x = WriteS x
@@ -862,7 +865,87 @@ struct
     Printf.printf "done!";
     [%expect {| done! |}]
 
-  (* TODO: recursive call test (for the future when memoization will be implemented) *)
+  (* - complex tests *)
+
+  let%expect_test "complex test: send, dsl" =
+    prog_eval_noret (
+      (* TODO: set optimal ref mods later *)
+      let user_utilsT = TupleT [uT_r_aw (* 0 id *); uT_r_aw] in
+      let user_infoT =  TupleT [uT_r_aw (* 0 name *); uT_r_aw; uT_r_aw] in
+      let userT = TupleT [cpT user_utilsT (* 0 utils *); cpT user_infoT (* 1 info *)] in
+      let versionT = TupleT [uT_r_aw (* 0 id *); uT_r_aw; uT_r_aw] in
+      let utilsT = TupleT [uT_r_aw (* 0 has_version *); uT_r_aw (* 1 id *)] in
+      let requestT = TupleT [cpT userT (* 0 user *);
+                             cpT versionT (* 1 version *);
+                             cpT utilsT (* 2 utils *);
+                             cpT uT_r_aw (* 3 data *);
+                             uT_r_aw (* 4 operation_date *)] in
+      let user_utilsE = TupleE [UnitE (* 0 id *); UnitE] in
+      let user_infoE =  TupleE [UnitE (* 0 name *); UnitE; UnitE] in
+      let userE = TupleE [rfg0E (* 0 utils *); rfg1E (* 1 info *)] in
+      let versionE = TupleE [UnitE (* 0 id *); UnitE; UnitE] in
+      let utilsE = TupleE [UnitE (* 0 has_version *); UnitE (* 1 id *)] in
+      let requestE = TupleE [rfg2E (* 0 user *);
+                             rfg3E (* 1 version *);
+                             rfg4E (* 2 utils *);
+                             rfg5E (* 3 data *);
+                             UnitE (* 4 operation_date *)] in
+      let get_version_idID = vg7 in
+      let updated_versionID = vg8 in
+      let sendID = vg9 in
+      let send_allID = vg10 in
+      let get_version_idF = FunD ([moded requestT],
+        (* (rdS @@ access 1 @@ drf @@ access 0 v0) |. skp) in *)
+         skp) in
+      (* TODO: real op paths *)
+      let updated_versionF = FunD ([moded requestT],
+        (* (rdS @@ access 2 @@ drf @@ access 0 v0) #. *)
+        (* TODO: read all the substructure ?? *)
+        (* (rdS @@ access 1 @@ drf @@ access 0 v0) #. *)
+        (* (rdS @@ access 1 @@ drf @@ access 1 v0)) in *)
+         skp) in
+      let sendF = FunD ([moded requestT],
+        (* (( *)
+           (* (wrS @@ access 2 @@ drf @@ access 0 v0) #. *)
+           (* (rdS @@ access 3 @@ drf v0) #. *)
+           (* (wrS @@ access 3 @@ drf v0) #. *)
+           (* (rdS @@ access 0 @@ drf @@ access 1 @@ drf @@ access 0 v0) *)
+         (* ) |. skp) #. *)
+         (* (wrS @@ access 4 v0) #. *)
+         (* TODO: read all the substructure ?? *)
+         (* (rdS @@ access 4 v0) (*rdS v0*)) in (* FIXME: TMP, parial read, should be full *) *)
+         skp) in
+      let send_allF = FunD ([moded requestT],
+        (wrS @@ access 4 v0) (*wrS v0*) #. (* FIXME: TMP, parial write, should be full *)
+        (* (callS sendID [pE v0]) #. *)
+        (* (callS get_version_idID [pE v0]) #. *)
+        (* (callS updated_versionID [pE v0]) #. *)
+        (* TODO: read all the substructure ?? *)
+        (wrS @@ access 1 @@ drf @@ access 0 v0) #.
+        (* (wrS @@ access 1 @@ drf @@ access 1 v0) #. *)
+        (* --- *)
+        (* ((rdS @@ access 0 @@ drf @@ access 0 @@ drf @@ access 0 v0) |. *)
+         (* (rdS @@ access 2 @@ drf @@ access 0 v0))) in *)
+         skp) in
+      let varID = vg6 in
+      [
+        defg user_utilsT user_utilsE;
+        defg user_infoT user_infoE;
+        defg userT userE;
+        defg versionT versionE;
+        defg utilsT utilsE;
+        defgu uT_r_aw;
+        defg requestT requestE;
+        get_version_idF;
+        updated_versionF;
+        sendF;
+        send_allF
+        (* TODO: var def *)
+      ],
+      callS send_allID [pE varID]
+    );
+    Printf.printf "done!";
+    [%expect {| done! |}]
 
   (* --- FIXME --- CURRENT REWRITE POINT --- FIXME --- *)
 
diff --git a/model_with_structures/send_example.md b/model_with_structures/send_example.md
new file mode 100644
index 0000000..0926245
--- /dev/null
+++ b/model_with_structures/send_example.md
@@ -0,0 +1,172 @@
+### C++ pseudocode
+```cpp
+// external
+
+struct Data { /*...*/ };
+struct DateTime { /*...*/ };
+
+Request init() { /*...*/ }
+Version old_version_placeholder() { /*...*/ }
+bool new_api_activated() { /*...*/ }
+void do_request(const Remote& remote, const Request& r) { /*...*/ }
+Data convert_to_new_data(const Data& data) { /*...*/ }
+string name_to_new_format(const string& name) { /*...*/ }
+DateTime current_time() { /*...*/ }
+bool no_errors() { /*...*/ }
+void log_write(int x) { /*...*/ }
+
+// structures
+
+struct UserUtils {
+  int id;
+  vector<int> connected_users;
+};
+
+struct UserInfo {
+  string name;
+  string surname;
+  int age;
+};
+
+struct User {
+  UserUtils* utils;
+  PersonalInfo* info;
+};
+
+struct Version {
+  int id;
+  DateTime release_date;
+  vector<int> supported_stds;
+};
+
+struct Utils {
+  bool has_version;
+  int id;
+};
+
+struct Request {
+  User* user;
+  Version* version;
+  Utils* utils;
+  Data* data;
+  DateTime operaiton_date;
+};
+
+// example itself
+
+int get_version_id(Request /*[?]*/  r) {
+  if (r.utils.has_version) {
+    return r.version.id;
+  }
+  return old_version_placeholder().id;
+}
+
+Version updated_version(Request /*[?]*/  r) {
+  if (not r.utils.has_version) {
+    return old_version_placeholder();
+  }
+  return r.vestion;
+}
+
+void send(const Remote& remote, Request /*[?]*/ r) {
+  if (new_api_activated()) {
+    r.utils.has_version = true;
+    r.data = convert_to_new_data(r.data);
+    r.user.info.name =
+      name_to_new_format(r.user.info.name);
+  }
+  r.time = current_time();
+  do_request(remote, r);
+}
+
+void send_all(const vector<Remote>& remotes) {
+  Request r = init();
+  for(const auto& remote : remotes) {
+    send(remote, r);
+    log_write(get_version_id(r));
+  }
+  r.version = updated_version(r);
+  if (no_errors()) {
+    print("Done requests for user {}", r.user.utils.id);
+  } else {
+    print("Error during send of {}", r.utils.id);
+  }
+}
+```
+
+### DSL pseudocode
+```python
+
+# structures
+
+UserUtils := [(); ()] # id, connected_users
+
+UserInfo := [(); (); ()] # name, surname, age
+
+User := [& UserUtils; & UserInfo] # utils, info
+# or User := [& [(); ()]; & [(); (); ()]] # utils, info
+
+Version := [(); (); ()] # id, release_date, supported_stds
+
+Utils := [(); ()] # has_version, id
+
+Request := [& User; # user
+            & Version; # version
+            & Utils; # utils
+            & (); # data
+            ()] # operation_date
+# or Request := [& [& [(); ()], & [(); (); ()]]; # user
+#                & [(); (); ()]; # version
+#                & [(); ()]; # utils
+#                & (); # data
+#                ()] # operation_date
+
+# example itself
+
+get_version_id(r : Request) {
+  read(r.version.id) | skip
+}
+
+updated_version(r : Request) {
+  read(r.utils.has_version);
+  read(r.version)
+}
+
+send(r : Request) {
+  ((write(r.utils.has_version);
+    convert_to_new_data(r.data); # -> read(r.data)
+    write(r.data);
+    name_to_new_format(r.user.info.name); # -> read(r.user.info.name)
+    write(r.user.info.name))
+   | skip);
+  write(r.time);
+  do_request(r) # -> read(r)
+}
+
+send_all(r : Request) { # NOTE: add argument to not place body on top level
+  write(r);
+  send(r);
+  get_version_id(r);
+
+  updated_version(r);
+  write(r.version);
+
+  (read(r.user.utils.id) | read(r.utils.id))
+}
+
+send_all(r)
+```
+`
+
+### Actual representation
+In `analyzer.ml` & `synthesizer.ml`
+
+### DSL result
+```
+TODO
+```
+
+### C++ result
+```
+TODO
+```
diff --git a/model_with_structures/synthesizer.ml b/model_with_structures/synthesizer.ml
index c26b2b7..2030de9 100644
--- a/model_with_structures/synthesizer.ml
+++ b/model_with_structures/synthesizer.ml
@@ -538,13 +538,13 @@ struct
             valcopyo mem v' tp' (Std.pair mem_cp v_cp) &
             mem_addo mem_cp v_cp (Std.pair mem_add id_add) &
             mem_with_id' == (mem_add, RefV id_add) } } } |
-      { fresh vs, tps, init_mem_with_vs, mem_with_vs', mem', vs' in
+      { fresh vs, tps, mem', vs', vs'' in
         v == TupleV vs &
         tp == TupleT tps &
-        init_mem_with_vs == Std.pair mem [] &
-        list_foldl2o valcopy_foldero init_mem_with_vs vs tps mem_with_vs' &
-        Std.pair mem' vs' == mem_with_vs' &
-        mem_with_id' == Std.pair mem' (TupleV vs') }
+        list_foldl2o valcopy_foldero (Std.pair mem []) vs tps (Std.pair mem' vs') &
+         == mem_with_vs' &
+        List.reverso vs' vs''
+        mem_with_id' == Std.pair mem' (TupleV vs'') }
   }
 
   (* - value update *)