diff --git a/model_with_structures/synthesizer.ml b/model_with_structures/synthesizer.ml
index 31a1e70..cc6f730 100644
--- a/model_with_structures/synthesizer.ml
+++ b/model_with_structures/synthesizer.ml
@@ -167,7 +167,7 @@ struct
     [%%ocanren_inject
       type nonrec ('sl, 'd, 'vl) t = ZeroV | SmthV | BotV | FunV of 'sl | RefV of 'd | TupleV of 'vl
       [@@deriving gt ~options:{ show; gmap }]
-      type ground = ((Nat.ground List.ground * Stmt.ground) List.ground, Nat.ground, ground List.ground) t
+      type ground = (((* Nat.ground List.ground * *) Stmt.ground) List.ground, Nat.ground, ground List.ground) t
     ]
   end
 
@@ -814,8 +814,8 @@ struct
           s == CallS (f, es) &
           pathvalo mem vals f v &
           pathtypeo types f tp &
-          types' == TypesEnv [] &
-          vals' == ValsEnv [] &
+          types' == TypesEnv [] & (* TODO: FIXME add globals *)
+          vals' == ValsEnv [] & (* TODO: FIXME add globals *)
           v == FunV fstmts &
           tp == FunT tps &
           st' == StEnv (mem, types', vals') &
@@ -867,9 +867,12 @@ struct
 
   let prog_evalo prog st' =
     let open Prg in
+    let open Stmt in
     ocanren {
-      fresh decls, s, init_st in 
+      fresh decls, s, init_st in
       prog == Prg (decls, s) &
+      decls == [] &
+      s == SkipS &
       prog_inito prog init_st &
       stmt_evalo init_st s st'
   }
diff --git a/model_with_structures/tests.ml b/model_with_structures/tests.ml
index 674f35c..bf6b1bd 100644
--- a/model_with_structures/tests.ml
+++ b/model_with_structures/tests.ml
@@ -2,6 +2,8 @@ open Tests_f
 open Synthesizer
 open Relational
 
+let%expect_test "prog eval test 1" = print_endline (prog_eval_t1 ()); [%expect {| [StEnv (MemEnv ([], O), TypesEnv ([]), ValsEnv ([]))] |}]
+
 (* type tests *)
 (* let%expect_test "Tag type test" = print_endline (Tag.Test.test ()); [%expect {| [Tag (Rd, NeverWr, Ref, In, NOut)] |}] *)
 (* let%expect_test "Stmt type test (1)" = print_endline (Stmt.Test.test1 ()); [%expect {| [[S (S (O))]] |}] *)
diff --git a/model_with_structures/tests_f.ml b/model_with_structures/tests_f.ml
index 093ced7..6737d97 100644
--- a/model_with_structures/tests_f.ml
+++ b/model_with_structures/tests_f.ml
@@ -4,7 +4,17 @@ open GT
 open OCanren
 open OCanren.Std
 
-(* @type answer  = St.ground GT.list with show *)
+@type answer  = StEnv.ground GT.list with show
+
+let prog_eval_t1 _ = show(answer) (Stream.take (run q
+  (fun q -> let open Prg in
+            let open Stmt in
+            ocanren {
+              fresh prog in
+              prog == Prg ([], SkipS) &
+              prog_evalo prog q})
+  (fun q -> q#reify (StEnv.prj_exn))))
+
 (* @type answerArgs = (Arg.ground List.ground) GT.list with show *)
 (* @type answerValue = Value.ground GT.list with show *)
 (* @type answerNat = Nat.ground GT.list with show *)