diff --git a/config/regexp_search_alt_div/default.json b/config/regexp_search_alt_div/default.json
new file mode 100644
index 0000000..925b36f
--- /dev/null
+++ b/config/regexp_search_alt_div/default.json
@@ -0,0 +1,98 @@
+{
+    "pop_size": 1000,
+    "growth_factor": 2.0,
+    "crossover_ratio": 0.5,
+    "mutation_ratio": 0.45,
+    "remove_duplicates": true,
+
+    "plugin_dir":"_build/plugins/regexp_search/",
+    "plugins":
+    [
+        "../selection/Tournament.cmxs",
+        "../parent_chooser/UniformParentChooser.cmxs",
+        "creation/RandomCreation.cmxs",
+        "creation/CreationFromExample.cmxs",
+        "mutation/RebuildSubtreeMutation.cmxs",
+        "mutation/ReduceMutation.cmxs",
+        "crossover/TakeSubtreeCrossover.cmxs",
+        "crossover/CombineCrossover.cmxs",
+        "fitness/MultiobjectiveFitness.cmxs",
+        "simplification/RepeatSimplification.cmxs",
+        "simplification/GroupChars.cmxs"
+    ],
+
+    "creation":
+    [
+        {
+            "proba":0.1, "method":"from_example",
+            "params":
+            {
+                "replacement_patterns":
+                [
+                    { "proba":0.5, "regexp":"[A-Z]" },
+                    { "proba":0.5, "regexp":"[a-z]" },
+                    { "proba":0.7, "regexp":"[0-9]" },
+                    { "proba":0.5, "regexp":"[ \t]" },
+                    { "proba":0.8, "regexp":"[A-Za-z]" },
+                    { "proba":0.2, "regexp":"." }
+                ]
+            }
+        },
+        { "proba":0.4, "method":"fill", "params":"&random_gen" },
+        { "proba":0.5, "method":"grow", "params":"&random_gen" }
+    ],
+    "mutation":
+    [
+        { "proba":0.7, "method":"rebuild_subtree", "params":"&random_gen" },
+        { "proba":0.3, "method":"reduce" }
+    ],
+    "crossover":
+    [
+        { "proba":0.9, "method":"take_subtree" },
+        { "proba":0.1, "method":"combine", "params":{"alt_proba":0.0} }
+    ],
+    "fitness":
+    {
+        "method":"multiobjective",
+        "params":
+        {
+            "full_example_score":10.0,
+            "full_counter_example_score":250.0,
+            "partial_example_score":5.0,
+            "partial_counter_example_score":0.0,
+            "size_score":1.0,
+            "elim_size":150
+        }
+    },
+    "simplifications":
+    [
+        { "schedule":100, "method":"repeat_simplification" },
+        { "schedule":100, "method":"group_chars" }
+    ],
+    "selection" : { "method":"tournament" },
+    "parent_choice": { "method":"uniform" },
+
+    "&random_gen":
+    {
+        "min_init_depth": 3,
+        "max_init_depth": 7,
+        "max_depth": 10,
+
+        "concat_proba": 0.55,
+        "alt_proba": 0.0,
+        "opt_proba": 0.05,
+        "plus_proba": 0.05,
+        "star_proba": 0.05,
+        "rand_char_proba": 0.25,
+        "predefined_proba": 0.05,
+        "predefined_list":
+        [
+            { "proba":0.2, "regexp":"." },
+            { "proba":0.3, "regexp":"[A-Za-z]" },
+            { "proba":0.1, "regexp":"[A-Z]" },
+            { "proba":0.1, "regexp":"[a-z]" },
+            { "proba":0.2, "regexp":"[0-9]" },
+            { "proba":0.1, "regexp":"[ \t]" }
+        ]
+    }
+}
diff --git a/config/regexp_search_alt_div/strict.json b/config/regexp_search_alt_div/strict.json
new file mode 100644
index 0000000..2672950
--- /dev/null
+++ b/config/regexp_search_alt_div/strict.json
@@ -0,0 +1,98 @@
+{
+    "pop_size": 1000,
+    "growth_factor": 2.0,
+    "crossover_ratio": 0.5,
+    "mutation_ratio": 0.45,
+    "remove_duplicates": true,
+
+    "plugin_dir":"_build/plugins/regexp_search/",
+    "plugins":
+    [
+        "../selection/Tournament.cmxs",
+        "../parent_chooser/UniformParentChooser.cmxs",
+        "creation/RandomCreation.cmxs",
+        "creation/CreationFromExample.cmxs",
+        "mutation/RebuildSubtreeMutation.cmxs",
+        "mutation/ReduceMutation.cmxs",
+        "crossover/TakeSubtreeCrossover.cmxs",
+        "crossover/CombineCrossover.cmxs",
+        "fitness/MultiobjectiveFitness.cmxs",
+        "simplification/RepeatSimplification.cmxs",
+        "simplification/GroupChars.cmxs"
+    ],
+
+    "creation":
+    [
+        {
+            "proba":0.1, "method":"from_example",
+            "params":
+            {
+                "replacement_patterns":
+                [
+                    { "proba":0.5, "regexp":"[A-Z]" },
+                    { "proba":0.5, "regexp":"[a-z]" },
+                    { "proba":0.7, "regexp":"[0-9]" },
+                    { "proba":0.5, "regexp":"[ \t]" },
+                    { "proba":0.8, "regexp":"[A-Za-z]" },
+                    { "proba":0.2, "regexp":"." }
+                ]
+            }
+        },
+        { "proba":0.4, "method":"fill", "params":"&random_gen" },
+        { "proba":0.5, "method":"grow", "params":"&random_gen" }
+    ],
+    "mutation":
+    [
+        { "proba":0.7, "method":"rebuild_subtree", "params":"&random_gen" },
+        { "proba":0.3, "method":"reduce" }
+    ],
+    "crossover":
+    [
+        { "proba":0.9, "method":"take_subtree" },
+        { "proba":0.1, "method":"combine", "params":{"alt_proba":0.0} }
+    ],
+    "fitness":
+    {
+        "method":"multiobjective",
+        "params":
+        {
+            "full_example_score":10.0,
+            "full_counter_example_score":1000.0,
+            "partial_example_score":5.0,
+            "partial_counter_example_score":1.0,
+            "size_score":1.0,
+            "elim_size":60
+        }
+    },
+    "simplifications":
+    [
+        { "schedule":100, "method":"repeat_simplification" },
+        { "schedule":100, "method":"group_chars" }
+    ],
+    "selection" : { "method":"tournament" },
+    "parent_choice": { "method":"uniform" },
+
+    "&random_gen":
+    {
+        "min_init_depth": 3,
+        "max_init_depth": 7,
+        "max_depth": 10,
+
+        "concat_proba": 0.55,
+        "alt_proba": 0.0,
+        "opt_proba": 0.05,
+        "plus_proba": 0.05,
+        "star_proba": 0.05,
+        "rand_char_proba": 0.25,
+        "predefined_proba": 0.05,
+        "predefined_list":
+        [
+            { "proba":0.2, "regexp":"." },
+            { "proba":0.3, "regexp":"[A-Za-z]" },
+            { "proba":0.1, "regexp":"[A-Z]" },
+            { "proba":0.1, "regexp":"[a-z]" },
+            { "proba":0.2, "regexp":"[0-9]" },
+            { "proba":0.1, "regexp":"[ \t]" }
+        ]
+    }
+}
diff --git a/implementations/regexp_search/regexp_search_alt_div.ml b/implementations/regexp_search/regexp_search_alt_div.ml
index 7ff5189..b083bf0 100644
--- a/implementations/regexp_search/regexp_search_alt_div.ml
+++ b/implementations/regexp_search/regexp_search_alt_div.ml
@@ -36,7 +36,7 @@ let () =
         It creates and evolve a population of candidate regular expressions with a genetic algorithm.\n\
         All the genetic operators on the population must be provided through plugins loaded dynamically.\n\
         You need to provide a configuration file specifying the required plugins and the parameters of the evolution process.\n\
-        Usage: regexp-search-alt-d&c [options] configFilename\n\
+        Usage: regexp-search-alt-div [options] configFilename\n\
         \n\
         Options available:"
     in