3 files changed, 11 insertions, 10 deletions
diff --git a/backends/lean/Base/Arith/Base.lean b/backends/lean/Base/Arith/Base.lean
index 8ada4171..fb6b12e5 100644
--- a/backends/lean/Base/Arith/Base.lean
+++ b/backends/lean/Base/Arith/Base.lean
@@ -1,6 +1,5 @@
 import Lean
-import Std.Data.Int.Lemmas
-import Mathlib.Tactic.Linarith
+import Mathlib.Tactic.Linarith -- Introduces a lot of useful lemmas
 
 namespace Arith
 
@@ -21,12 +20,12 @@ theorem ne_is_lt_or_gt {x y : Int} (hne : x ≠ y) : x < y ∨ x > y := by
   have hne : x - y ≠ 0 := by
     simp
     intro h
-    have: x = y := by linarith
+    have: x = y := by omega
     simp_all
   have h := ne_zero_is_lt_or_gt hne
   match h with
-  | .inl _ => left; linarith
-  | .inr _ => right; linarith
+  | .inl _ => left; omega
+  | .inr _ => right; omega
 
 -- TODO: move?
 theorem add_one_le_iff_le_ne (n m : Nat) (h1 : m ≤ n) (h2 : m ≠ n) : m + 1 ≤ n := by
@@ -66,7 +65,7 @@ theorem to_int_to_nat_lt (x y : ℤ) (h0 : 0 ≤ x) (h1 : x < y) :
 theorem to_int_sub_to_nat_lt (x y : ℤ) (x' : ℕ)
   (h0 : ↑x' ≤ x) (h1 : x - ↑x' < y) :
   ↑(x.toNat - x') < y := by
-  have : 0 ≤ x := by linarith
+  have : 0 ≤ x := by omega
   simp [Int.toNat_sub_of_le, *]
 
 end Arith
diff --git a/backends/lean/Base/Arith/Int.lean b/backends/lean/Base/Arith/Int.lean
index 6d27a35e..1d3e82be 100644
--- a/backends/lean/Base/Arith/Int.lean
+++ b/backends/lean/Base/Arith/Int.lean
@@ -180,7 +180,7 @@ def introInstances (declToUnfold : Name) (lookup : Expr → MetaM (Option Expr))
     -- Add a declaration
     let nval ← Utils.addDeclTac name e type (asLet := false)
     -- Simplify to unfold the declaration to unfold (i.e., the projector)
-    Utils.simpAt true {} [declToUnfold] [] [] (Location.targets #[mkIdent name] false)
+    Utils.simpAt true {} #[] [declToUnfold] [] [] (Location.targets #[mkIdent name] false)
     -- Return the new value
     pure nval
 
@@ -214,7 +214,7 @@ def intTacPreprocess (extraPreprocess :  Tactic.TacticM Unit) : Tactic.TacticM U
   extraPreprocess
   -- Reduce all the terms in the goal - note that the extra preprocessing step
   -- might have proven the goal, hence the `Tactic.allGoals`
-  Tactic.allGoals do tryTac (dsimpAt false {} [] [] [] Tactic.Location.wildcard)
+  Tactic.allGoals do tryTac (dsimpAt false {} #[] [] [] [] Tactic.Location.wildcard)
 
 elab "int_tac_preprocess" : tactic =>
   intTacPreprocess (do pure ())
@@ -231,10 +231,10 @@ def intTac (tacName : String) (splitGoalConjs : Bool) (extraPreprocess :  Tactic
   -- the goal. I think before leads to a smaller proof term?
   Tactic.allGoals (intTacPreprocess extraPreprocess)
   -- More preprocessing
-  Tactic.allGoals (Utils.tryTac (Utils.simpAt true {} [] [``nat_zero_eq_int_zero] [] .wildcard))
+  Tactic.allGoals (Utils.tryTac (Utils.simpAt true {} #[] [] [``nat_zero_eq_int_zero] [] .wildcard))
   -- Split the conjunctions in the goal
   if splitGoalConjs then Tactic.allGoals (Utils.repeatTac Utils.splitConjTarget)
-  -- Call linarith
+  -- Call omega
   Tactic.allGoals do
     try do Tactic.Omega.omegaTactic {}
     catch _ =>
diff --git a/backends/lean/Base/Arith/Scalar.lean b/backends/lean/Base/Arith/Scalar.lean
index 8793713b..ecc5acaf 100644
--- a/backends/lean/Base/Arith/Scalar.lean
+++ b/backends/lean/Base/Arith/Scalar.lean
@@ -18,6 +18,8 @@ def scalarTacExtraPreprocess : Tactic.TacticM Unit := do
   add (← mkAppM ``Scalar.cMax_bound #[.const ``ScalarTy.Isize []])
   -- Reveal the concrete bounds, simplify calls to [ofInt]
   Utils.simpAt true {}
+               -- Simprocs
+               #[]
                -- Unfoldings
                [``Scalar.min, ``Scalar.max, ``Scalar.cMin, ``Scalar.cMax,
                 ``I8.min, ``I16.min, ``I32.min, ``I64.min, ``I128.min,