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diff --git a/tests/lean/NoNestedBorrows.lean b/tests/lean/NoNestedBorrows.lean
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+++ b/tests/lean/NoNestedBorrows.lean
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+-- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS
+-- [no_nested_borrows]
+import Base
+open Primitives
+namespace no_nested_borrows
+
+/- [no_nested_borrows::Pair] -/
+structure Pair (T1 T2 : Type) where
+  x : T1
+  y : T2
+
+/- [no_nested_borrows::List] -/
+inductive List (T : Type) :=
+| Cons : T → List T → List T
+| Nil : List T
+
+/- [no_nested_borrows::One] -/
+inductive One (T1 : Type) :=
+| One : T1 → One T1
+
+/- [no_nested_borrows::EmptyEnum] -/
+inductive EmptyEnum :=
+| Empty : EmptyEnum
+
+/- [no_nested_borrows::Enum] -/
+inductive Enum :=
+| Variant1 : Enum
+| Variant2 : Enum
+
+/- [no_nested_borrows::EmptyStruct] -/
+structure EmptyStruct where
+
+/- [no_nested_borrows::Sum] -/
+inductive Sum (T1 T2 : Type) :=
+| Left : T1 → Sum T1 T2
+| Right : T2 → Sum T1 T2
+
+/- [no_nested_borrows::neg_test]: forward function -/
+def neg_test (x : I32) : Result I32 :=
+  - x
+
+/- [no_nested_borrows::add_test]: forward function -/
+def add_test (x : U32) (y : U32) : Result U32 :=
+  x + y
+
+/- [no_nested_borrows::subs_test]: forward function -/
+def subs_test (x : U32) (y : U32) : Result U32 :=
+  x - y
+
+/- [no_nested_borrows::div_test]: forward function -/
+def div_test (x : U32) (y : U32) : Result U32 :=
+  x / y
+
+/- [no_nested_borrows::div_test1]: forward function -/
+def div_test1 (x : U32) : Result U32 :=
+  x / (U32.ofInt 2)
+
+/- [no_nested_borrows::rem_test]: forward function -/
+def rem_test (x : U32) (y : U32) : Result U32 :=
+  x % y
+
+/- [no_nested_borrows::cast_test]: forward function -/
+def cast_test (x : U32) : Result I32 :=
+  Scalar.cast .I32 x
+
+/- [no_nested_borrows::test2]: forward function -/
+def test2 : Result Unit :=
+  do
+    let _ ← (U32.ofInt 23) + (U32.ofInt 44)
+    Result.ret ()
+
+/- Unit test for [no_nested_borrows::test2] -/
+#assert (test2 == .ret ())
+
+/- [no_nested_borrows::get_max]: forward function -/
+def get_max (x : U32) (y : U32) : Result U32 :=
+  if x >= y
+  then Result.ret x
+  else Result.ret y
+
+/- [no_nested_borrows::test3]: forward function -/
+def test3 : Result Unit :=
+  do
+    let x ← get_max (U32.ofInt 4) (U32.ofInt 3)
+    let y ← get_max (U32.ofInt 10) (U32.ofInt 11)
+    let z ← x + y
+    if not (z = (U32.ofInt 15))
+    then Result.fail Error.panic
+    else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test3] -/
+#assert (test3 == .ret ())
+
+/- [no_nested_borrows::test_neg1]: forward function -/
+def test_neg1 : Result Unit :=
+  do
+    let y ← - (I32.ofInt 3)
+    if not (y = (I32.ofInt (-(3:Int))))
+    then Result.fail Error.panic
+    else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_neg1] -/
+#assert (test_neg1 == .ret ())
+
+/- [no_nested_borrows::refs_test1]: forward function -/
+def refs_test1 : Result Unit :=
+  if not ((I32.ofInt 1) = (I32.ofInt 1))
+  then Result.fail Error.panic
+  else Result.ret ()
+
+/- Unit test for [no_nested_borrows::refs_test1] -/
+#assert (refs_test1 == .ret ())
+
+/- [no_nested_borrows::refs_test2]: forward function -/
+def refs_test2 : Result Unit :=
+  if not ((I32.ofInt 2) = (I32.ofInt 2))
+  then Result.fail Error.panic
+  else
+    if not ((I32.ofInt 0) = (I32.ofInt 0))
+    then Result.fail Error.panic
+    else
+      if not ((I32.ofInt 2) = (I32.ofInt 2))
+      then Result.fail Error.panic
+      else
+        if not ((I32.ofInt 2) = (I32.ofInt 2))
+        then Result.fail Error.panic
+        else Result.ret ()
+
+/- Unit test for [no_nested_borrows::refs_test2] -/
+#assert (refs_test2 == .ret ())
+
+/- [no_nested_borrows::test_list1]: forward function -/
+def test_list1 : Result Unit :=
+  Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_list1] -/
+#assert (test_list1 == .ret ())
+
+/- [no_nested_borrows::test_box1]: forward function -/
+def test_box1 : Result Unit :=
+  let b := (I32.ofInt 1)
+  let x := b
+  if not (x = (I32.ofInt 1))
+  then Result.fail Error.panic
+  else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_box1] -/
+#assert (test_box1 == .ret ())
+
+/- [no_nested_borrows::copy_int]: forward function -/
+def copy_int (x : I32) : Result I32 :=
+  Result.ret x
+
+/- [no_nested_borrows::test_unreachable]: forward function -/
+def test_unreachable (b : Bool) : Result Unit :=
+  if b
+  then Result.fail Error.panic
+  else Result.ret ()
+
+/- [no_nested_borrows::test_panic]: forward function -/
+def test_panic (b : Bool) : Result Unit :=
+  if b
+  then Result.fail Error.panic
+  else Result.ret ()
+
+/- [no_nested_borrows::test_copy_int]: forward function -/
+def test_copy_int : Result Unit :=
+  do
+    let y ← copy_int (I32.ofInt 0)
+    if not ((I32.ofInt 0) = y)
+    then Result.fail Error.panic
+    else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_copy_int] -/
+#assert (test_copy_int == .ret ())
+
+/- [no_nested_borrows::is_cons]: forward function -/
+def is_cons (T : Type) (l : List T) : Result Bool :=
+  match l with
+  | List.Cons t l0 => Result.ret true
+  | List.Nil => Result.ret false
+
+/- [no_nested_borrows::test_is_cons]: forward function -/
+def test_is_cons : Result Unit :=
+  do
+    let l := List.Nil
+    let b ← is_cons I32 (List.Cons (I32.ofInt 0) l)
+    if not b
+    then Result.fail Error.panic
+    else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_is_cons] -/
+#assert (test_is_cons == .ret ())
+
+/- [no_nested_borrows::split_list]: forward function -/
+def split_list (T : Type) (l : List T) : Result (T × (List T)) :=
+  match l with
+  | List.Cons hd tl => Result.ret (hd, tl)
+  | List.Nil => Result.fail Error.panic
+
+/- [no_nested_borrows::test_split_list]: forward function -/
+def test_split_list : Result Unit :=
+  do
+    let l := List.Nil
+    let p ← split_list I32 (List.Cons (I32.ofInt 0) l)
+    let (hd, _) := p
+    if not (hd = (I32.ofInt 0))
+    then Result.fail Error.panic
+    else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_split_list] -/
+#assert (test_split_list == .ret ())
+
+/- [no_nested_borrows::choose]: forward function -/
+def choose (T : Type) (b : Bool) (x : T) (y : T) : Result T :=
+  if b
+  then Result.ret x
+  else Result.ret y
+
+/- [no_nested_borrows::choose]: backward function 0 -/
+def choose_back
+  (T : Type) (b : Bool) (x : T) (y : T) (ret0 : T) : Result (T × T) :=
+  if b
+  then Result.ret (ret0, y)
+  else Result.ret (x, ret0)
+
+/- [no_nested_borrows::choose_test]: forward function -/
+def choose_test : Result Unit :=
+  do
+    let z ← choose I32 true (I32.ofInt 0) (I32.ofInt 0)
+    let z0 ← z + (I32.ofInt 1)
+    if not (z0 = (I32.ofInt 1))
+    then Result.fail Error.panic
+    else
+      do
+        let (x, y) ← choose_back I32 true (I32.ofInt 0) (I32.ofInt 0) z0
+        if not (x = (I32.ofInt 1))
+        then Result.fail Error.panic
+        else
+          if not (y = (I32.ofInt 0))
+          then Result.fail Error.panic
+          else Result.ret ()
+
+/- Unit test for [no_nested_borrows::choose_test] -/
+#assert (choose_test == .ret ())
+
+/- [no_nested_borrows::test_char]: forward function -/
+def test_char : Result Char :=
+  Result.ret 'a'
+
+mutual
+
+/- [no_nested_borrows::NodeElem] -/
+inductive NodeElem (T : Type) :=
+| Cons : Tree T → NodeElem T → NodeElem T
+| Nil : NodeElem T
+
+/- [no_nested_borrows::Tree] -/
+inductive Tree (T : Type) :=
+| Leaf : T → Tree T
+| Node : T → NodeElem T → Tree T → Tree T
+
+end
+
+/- [no_nested_borrows::list_length]: forward function -/
+divergent def list_length (T : Type) (l : List T) : Result U32 :=
+  match l with
+  | List.Cons t l1 => do
+                        let i ← list_length T l1
+                        (U32.ofInt 1) + i
+  | List.Nil => Result.ret (U32.ofInt 0)
+
+/- [no_nested_borrows::list_nth_shared]: forward function -/
+divergent def list_nth_shared (T : Type) (l : List T) (i : U32) : Result T :=
+  match l with
+  | List.Cons x tl =>
+    if i = (U32.ofInt 0)
+    then Result.ret x
+    else do
+           let i0 ← i - (U32.ofInt 1)
+           list_nth_shared T tl i0
+  | List.Nil => Result.fail Error.panic
+
+/- [no_nested_borrows::list_nth_mut]: forward function -/
+divergent def list_nth_mut (T : Type) (l : List T) (i : U32) : Result T :=
+  match l with
+  | List.Cons x tl =>
+    if i = (U32.ofInt 0)
+    then Result.ret x
+    else do
+           let i0 ← i - (U32.ofInt 1)
+           list_nth_mut T tl i0
+  | List.Nil => Result.fail Error.panic
+
+/- [no_nested_borrows::list_nth_mut]: backward function 0 -/
+divergent def list_nth_mut_back
+  (T : Type) (l : List T) (i : U32) (ret0 : T) : Result (List T) :=
+  match l with
+  | List.Cons x tl =>
+    if i = (U32.ofInt 0)
+    then Result.ret (List.Cons ret0 tl)
+    else
+      do
+        let i0 ← i - (U32.ofInt 1)
+        let tl0 ← list_nth_mut_back T tl i0 ret0
+        Result.ret (List.Cons x tl0)
+  | List.Nil => Result.fail Error.panic
+
+/- [no_nested_borrows::list_rev_aux]: forward function -/
+divergent def list_rev_aux
+  (T : Type) (li : List T) (lo : List T) : Result (List T) :=
+  match li with
+  | List.Cons hd tl => list_rev_aux T tl (List.Cons hd lo)
+  | List.Nil => Result.ret lo
+
+/- [no_nested_borrows::list_rev]: merged forward/backward function
+   (there is a single backward function, and the forward function returns ()) -/
+def list_rev (T : Type) (l : List T) : Result (List T) :=
+  let li := mem.replace (List T) l List.Nil
+  list_rev_aux T li List.Nil
+
+/- [no_nested_borrows::test_list_functions]: forward function -/
+def test_list_functions : Result Unit :=
+  do
+    let l := List.Nil
+    let l0 := List.Cons (I32.ofInt 2) l
+    let l1 := List.Cons (I32.ofInt 1) l0
+    let i ← list_length I32 (List.Cons (I32.ofInt 0) l1)
+    if not (i = (U32.ofInt 3))
+    then Result.fail Error.panic
+    else
+      do
+        let i0 ←
+          list_nth_shared I32 (List.Cons (I32.ofInt 0) l1) (U32.ofInt 0)
+        if not (i0 = (I32.ofInt 0))
+        then Result.fail Error.panic
+        else
+          do
+            let i1 ←
+              list_nth_shared I32 (List.Cons (I32.ofInt 0) l1) (U32.ofInt 1)
+            if not (i1 = (I32.ofInt 1))
+            then Result.fail Error.panic
+            else
+              do
+                let i2 ←
+                  list_nth_shared I32 (List.Cons (I32.ofInt 0) l1)
+                    (U32.ofInt 2)
+                if not (i2 = (I32.ofInt 2))
+                then Result.fail Error.panic
+                else
+                  do
+                    let ls ←
+                      list_nth_mut_back I32 (List.Cons (I32.ofInt 0) l1)
+                        (U32.ofInt 1) (I32.ofInt 3)
+                    let i3 ← list_nth_shared I32 ls (U32.ofInt 0)
+                    if not (i3 = (I32.ofInt 0))
+                    then Result.fail Error.panic
+                    else
+                      do
+                        let i4 ← list_nth_shared I32 ls (U32.ofInt 1)
+                        if not (i4 = (I32.ofInt 3))
+                        then Result.fail Error.panic
+                        else
+                          do
+                            let i5 ← list_nth_shared I32 ls (U32.ofInt 2)
+                            if not (i5 = (I32.ofInt 2))
+                            then Result.fail Error.panic
+                            else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_list_functions] -/
+#assert (test_list_functions == .ret ())
+
+/- [no_nested_borrows::id_mut_pair1]: forward function -/
+def id_mut_pair1 (T1 T2 : Type) (x : T1) (y : T2) : Result (T1 × T2) :=
+  Result.ret (x, y)
+
+/- [no_nested_borrows::id_mut_pair1]: backward function 0 -/
+def id_mut_pair1_back
+  (T1 T2 : Type) (x : T1) (y : T2) (ret0 : (T1 × T2)) : Result (T1 × T2) :=
+  let (t, t0) := ret0
+  Result.ret (t, t0)
+
+/- [no_nested_borrows::id_mut_pair2]: forward function -/
+def id_mut_pair2 (T1 T2 : Type) (p : (T1 × T2)) : Result (T1 × T2) :=
+  let (t, t0) := p
+  Result.ret (t, t0)
+
+/- [no_nested_borrows::id_mut_pair2]: backward function 0 -/
+def id_mut_pair2_back
+  (T1 T2 : Type) (p : (T1 × T2)) (ret0 : (T1 × T2)) : Result (T1 × T2) :=
+  let (t, t0) := ret0
+  Result.ret (t, t0)
+
+/- [no_nested_borrows::id_mut_pair3]: forward function -/
+def id_mut_pair3 (T1 T2 : Type) (x : T1) (y : T2) : Result (T1 × T2) :=
+  Result.ret (x, y)
+
+/- [no_nested_borrows::id_mut_pair3]: backward function 0 -/
+def id_mut_pair3_back'a
+  (T1 T2 : Type) (x : T1) (y : T2) (ret0 : T1) : Result T1 :=
+  Result.ret ret0
+
+/- [no_nested_borrows::id_mut_pair3]: backward function 1 -/
+def id_mut_pair3_back'b
+  (T1 T2 : Type) (x : T1) (y : T2) (ret0 : T2) : Result T2 :=
+  Result.ret ret0
+
+/- [no_nested_borrows::id_mut_pair4]: forward function -/
+def id_mut_pair4 (T1 T2 : Type) (p : (T1 × T2)) : Result (T1 × T2) :=
+  let (t, t0) := p
+  Result.ret (t, t0)
+
+/- [no_nested_borrows::id_mut_pair4]: backward function 0 -/
+def id_mut_pair4_back'a
+  (T1 T2 : Type) (p : (T1 × T2)) (ret0 : T1) : Result T1 :=
+  Result.ret ret0
+
+/- [no_nested_borrows::id_mut_pair4]: backward function 1 -/
+def id_mut_pair4_back'b
+  (T1 T2 : Type) (p : (T1 × T2)) (ret0 : T2) : Result T2 :=
+  Result.ret ret0
+
+/- [no_nested_borrows::StructWithTuple] -/
+structure StructWithTuple (T1 T2 : Type) where
+  p : (T1 × T2)
+
+/- [no_nested_borrows::new_tuple1]: forward function -/
+def new_tuple1 : Result (StructWithTuple U32 U32) :=
+  Result.ret { p := ((U32.ofInt 1), (U32.ofInt 2)) }
+
+/- [no_nested_borrows::new_tuple2]: forward function -/
+def new_tuple2 : Result (StructWithTuple I16 I16) :=
+  Result.ret { p := ((I16.ofInt 1), (I16.ofInt 2)) }
+
+/- [no_nested_borrows::new_tuple3]: forward function -/
+def new_tuple3 : Result (StructWithTuple U64 I64) :=
+  Result.ret { p := ((U64.ofInt 1), (I64.ofInt 2)) }
+
+/- [no_nested_borrows::StructWithPair] -/
+structure StructWithPair (T1 T2 : Type) where
+  p : Pair T1 T2
+
+/- [no_nested_borrows::new_pair1]: forward function -/
+def new_pair1 : Result (StructWithPair U32 U32) :=
+  Result.ret { p := { x := (U32.ofInt 1), y := (U32.ofInt 2) } }
+
+/- [no_nested_borrows::test_constants]: forward function -/
+def test_constants : Result Unit :=
+  do
+    let swt ← new_tuple1
+    let (i, _) := swt.p
+    if not (i = (U32.ofInt 1))
+    then Result.fail Error.panic
+    else
+      do
+        let swt0 ← new_tuple2
+        let (i0, _) := swt0.p
+        if not (i0 = (I16.ofInt 1))
+        then Result.fail Error.panic
+        else
+          do
+            let swt1 ← new_tuple3
+            let (i1, _) := swt1.p
+            if not (i1 = (U64.ofInt 1))
+            then Result.fail Error.panic
+            else
+              do
+                let swp ← new_pair1
+                if not (swp.p.x = (U32.ofInt 1))
+                then Result.fail Error.panic
+                else Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_constants] -/
+#assert (test_constants == .ret ())
+
+/- [no_nested_borrows::test_weird_borrows1]: forward function -/
+def test_weird_borrows1 : Result Unit :=
+  Result.ret ()
+
+/- Unit test for [no_nested_borrows::test_weird_borrows1] -/
+#assert (test_weird_borrows1 == .ret ())
+
+/- [no_nested_borrows::test_mem_replace]: merged forward/backward function
+   (there is a single backward function, and the forward function returns ()) -/
+def test_mem_replace (px : U32) : Result U32 :=
+  let y := mem.replace U32 px (U32.ofInt 1)
+  if not (y = (U32.ofInt 0))
+  then Result.fail Error.panic
+  else Result.ret (U32.ofInt 2)
+
+/- [no_nested_borrows::test_shared_borrow_bool1]: forward function -/
+def test_shared_borrow_bool1 (b : Bool) : Result U32 :=
+  if b
+  then Result.ret (U32.ofInt 0)
+  else Result.ret (U32.ofInt 1)
+
+/- [no_nested_borrows::test_shared_borrow_bool2]: forward function -/
+def test_shared_borrow_bool2 : Result U32 :=
+  Result.ret (U32.ofInt 0)
+
+/- [no_nested_borrows::test_shared_borrow_enum1]: forward function -/
+def test_shared_borrow_enum1 (l : List U32) : Result U32 :=
+  match l with
+  | List.Cons i l0 => Result.ret (U32.ofInt 1)
+  | List.Nil => Result.ret (U32.ofInt 0)
+
+/- [no_nested_borrows::test_shared_borrow_enum2]: forward function -/
+def test_shared_borrow_enum2 : Result U32 :=
+  Result.ret (U32.ofInt 0)
+
+end no_nested_borrows