diff --git a/src/kernel_services/abstract_interp/cvalue.ml b/src/kernel_services/abstract_interp/cvalue.ml
index aa3c9b484b35e309d6343b8bffbfbefdd658254a..f401f1594ad1c808bca9fa2c2909eaba6f127dd5 100644
--- a/src/kernel_services/abstract_interp/cvalue.ml
+++ b/src/kernel_services/abstract_interp/cvalue.ml
@@ -240,7 +240,7 @@ module V = struct
 
   let pretty_typ typ fmt v =
     let pretty_org fmt org =
-      if not (Origin.is_top org) then
+      if not (Origin.is_unknown org) then
         Format.fprintf fmt "@ @[(origin: %a)@]" Origin.pretty org
     in
     match v with
diff --git a/src/kernel_services/abstract_interp/map_lattice.ml b/src/kernel_services/abstract_interp/map_lattice.ml
index 62bb89ef6cddb8192951f297deaadd932b7f2f2e..204ad8aa11e5eeea839c306f7343033f456b7f88 100644
--- a/src/kernel_services/abstract_interp/map_lattice.ml
+++ b/src/kernel_services/abstract_interp/map_lattice.ml
@@ -286,7 +286,7 @@ module Make_MapSet_Lattice
 
   type t = Top of KSet.t * Origin.t | Map of KVMap.t
 
-  let top = Top (KSet.top, Origin.top)
+  let top = Top (KSet.top, Origin.unknown)
 
   let bottom = Map KVMap.empty
 
diff --git a/src/kernel_services/abstract_interp/offsetmap.ml b/src/kernel_services/abstract_interp/offsetmap.ml
index 0b88644948d8017cb4c40384c3591101ac45a011..2585c74c98c1599bb6c55475e6cd695b76ca1ffd 100644
--- a/src/kernel_services/abstract_interp/offsetmap.ml
+++ b/src/kernel_services/abstract_interp/offsetmap.ml
@@ -2803,14 +2803,14 @@ module Make_bitwise(V: sig
         in
         `Value (Int_Intervals.fold aux_itv itvs m)
     with Error_Top ->
-      update_imprecise_everywhere ~validity Origin.top v m
+      update_imprecise_everywhere ~validity Origin.unknown v m
 
   let add_binding_ival ~validity ~exact offsets ~size v m =
     match size with
     | Int_Base.Value size ->
       update ~validity ~exact ~offsets ~size v m
     | Int_Base.Top ->
-      update_imprecise_everywhere ~validity Origin.top v m
+      update_imprecise_everywhere ~validity Origin.unknown v m
 
   let fold_itv ?direction ~entire f itv m acc =
     let f' itv (v, _, _) acc = f itv v acc in
diff --git a/src/kernel_services/abstract_interp/origin.ml b/src/kernel_services/abstract_interp/origin.ml
index c3c4b4e1ac47a2492699f46d98ac869ac2ed2def..2b743f0d8540fa1d95052b20b33ff304bd1c6d2c 100644
--- a/src/kernel_services/abstract_interp/origin.ml
+++ b/src/kernel_services/abstract_interp/origin.ml
@@ -53,8 +53,8 @@ let current kind =
   Origin { kind; loc; id; }
 
 let well = Well
-let top = Unknown
-let is_top t = t = Unknown
+let unknown = Unknown
+let is_unknown t = t = Unknown
 
 module Prototype = struct
   include Datatype.Serializable_undefined
@@ -91,7 +91,7 @@ end
 include Datatype.Make (Prototype)
 
 let pretty_as_reason fmt org =
-  if not (is_top org)
+  if not (is_unknown org)
   then Format.fprintf fmt " because of %a" pretty org
 
 let join t1 t2 =
diff --git a/src/kernel_services/abstract_interp/origin.mli b/src/kernel_services/abstract_interp/origin.mli
index 572f9d586946995be6faf4ae7f92e72dd7d8a2c0..a739d8dca4c4782a0f71d99b6e9a881d0e08ebe2 100644
--- a/src/kernel_services/abstract_interp/origin.mli
+++ b/src/kernel_services/abstract_interp/origin.mli
@@ -40,8 +40,8 @@ val current: kind -> t
 (** This is automatically extracted from [Cil.CurrentLoc] *)
 
 val well: t
-val top: t
-val is_top: t -> bool
+val unknown: t
+val is_unknown: t -> bool
 
 val pretty_as_reason: Format.formatter -> t -> unit
 (** Pretty-print [because of <origin>] if the origin is not {!Unknown}, or
diff --git a/src/plugins/eva/domains/cvalue/warn.ml b/src/plugins/eva/domains/cvalue/warn.ml
index 3604d914973d55ba0cf412c4b6aee1436ec81f32..402f79f5702e6ba776db5bdded866e41561d0d50 100644
--- a/src/plugins/eva/domains/cvalue/warn.ml
+++ b/src/plugins/eva/domains/cvalue/warn.ml
@@ -67,7 +67,7 @@ let warn_imprecise_lval_read lv loc contents =
         Printer.pp_lval lv
         (fun fmt ->
            match loc.loc with
-           | Location_Bits.Top (param,o) when Origin.equal o Origin.top  ->
+           | Location_Bits.Top (param,o) when Origin.is_unknown o  ->
              Format.fprintf fmt "@[The location %a.@]@ "
                pretty_param param
            | Location_Bits.Top (param,orig) ->
@@ -83,7 +83,7 @@ let warn_imprecise_lval_read lv loc contents =
         )
         (fun fmt ->
            match contents with
-           | Location_Bytes.Top (param,o) when Origin.equal o Origin.top ->
+           | Location_Bytes.Top (param,o) when Origin.is_unknown o ->
              Format.fprintf fmt "@[%a.@]"
                pretty_param_b param
            | Location_Bytes.Top (param,orig) ->
@@ -109,7 +109,7 @@ let warn_right_exp_imprecision lv loc_lv exp_val =
              (Locations.pretty_english ~prefix:false) loc_lv
          | (Var _, _) -> ())
       (fun fmt org ->
-         if not (Origin.is_top origin) then
+         if not (Origin.is_unknown origin) then
            Format.fprintf fmt
              "@ @[The imprecision@ originates@ from@ %a@]"
              Origin.pretty org)
diff --git a/src/plugins/eva/domains/equality/equality_domain.ml b/src/plugins/eva/domains/equality/equality_domain.ml
index 9c7407b2d0138c580d74b96b56252074168718ea..55affa63dc9a97b8759e9139264972c7e574d5c2 100644
--- a/src/plugins/eva/domains/equality/equality_domain.ml
+++ b/src/plugins/eva/domains/equality/equality_domain.ml
@@ -212,7 +212,7 @@ module Make
       fun v ->
         let c = get v in
         if Cvalue.V.is_imprecise c then
-          let c' = Cvalue.V.topify_with_origin Origin.top c in
+          let c' = Cvalue.V.topify_with_origin Origin.unknown c in
           Value.set Main_values.CVal.key c' v
         else v
 
diff --git a/src/plugins/eva/domains/multidim/multidim_domain.ml b/src/plugins/eva/domains/multidim/multidim_domain.ml
index d721e62e638a22343470bb3815108b0e92ad2ec0..c5606b0ebeb8571025778bb05ca5f1fb8434c374 100644
--- a/src/plugins/eva/domains/multidim/multidim_domain.ml
+++ b/src/plugins/eva/domains/multidim/multidim_domain.ml
@@ -75,12 +75,12 @@ struct
   let of_bit ~typ:_ = function
     | Abstract_memory.Uninitialized -> uninitialized
     | Zero i -> make i (V.inject_int Integer.zero)
-    | Any (Top, i) -> make i (V.top_with_origin Origin.top)
+    | Any (Top, i) -> make i (V.top_with_origin Origin.unknown)
     | Any (Set s, i) ->
       let v =
         if Base.Hptset.is_empty s
         then V.inject_ival Ival.top
-        else V.inject_top_origin Origin.top s
+        else V.inject_top_origin Origin.unknown s
       in
       make i v