diff --git a/README.md b/README.md
index d61728b..a10f422 100644
--- a/README.md
+++ b/README.md
@@ -25,14 +25,14 @@ Algorithms:
 
 Data can be downloaded from [fontanf/orproblems](https://github.com/fontanf/orproblems)
 
-[Sequential ordering problem](include/examples/sequential_ordering.hpp)
+[Sequential ordering problem](include/treesearchsolver/examples/sequential_ordering.hpp)
 
 * The branching scheme is taken from "Tree search for the sequential ordering problem" (Libralesso et al., 2020) [PDF](https://ecai2020.eu/papers/1126_paper.pdf).
 * It is a forward branching scheme.
 * The guide of a node is its bound.
 * This implementation returns state-of-the-art results on the instances of the scientific literature with a dense precedence graph.
 
-[Permutation flow shop scheduling problem, makespan](include/examples/permutation_flowshop_scheduling_makespan.hpp) and [Permutation flow shop scheduling problem, total completion time](include/examples/permutationflowshopschedulingtct.hpp)
+[Permutation flow shop scheduling problem, makespan](include/treesearchsolver/examples/permutation_flowshop_scheduling_makespan.hpp) and [Permutation flow shop scheduling problem, total completion time](include/treesearchsolver/examples/permutationflowshopschedulingtct.hpp)
 
 * The branching schemes are taken from "Iterative beam search algorithms for the permutation flowshop" (Libralesso et al., 2022) [DOI](https://doi.org/10.1016/j.ejor.2021.10.015).
 * For the makespan variant, it is a bidirectional branching scheme.
@@ -48,9 +48,9 @@ Data can be downloaded from [fontanf/orproblems](https://github.com/fontanf/orpr
 
 * Here, the library is used to implement an exact dynamic programming algorithm implemented as a tree search
 
-[Knapsack problem with conflicts](include/examples/knapsack_with_conflicts.hpp)
+[Knapsack problem with conflicts](include/treesearchsolver/examples/knapsack_with_conflicts.hpp)
 
-[Simple assembly line balancing problem of type 1 (SALBP-1)](include/examples/simple_assembly_line_balancing_1.hpp)
+[Simple assembly line balancing problem of type 1 (SALBP-1)](include/treesearchsolver/examples/simple_assembly_line_balancing_1.hpp)
 
 ## Usage, running examples from command line
 
@@ -68,7 +68,7 @@ python3 scripts/download_data.py
 
 Then, examples can be executed as follows:
 ```shell
-./instance/bin/treesearchsolver_sequential_ordering --verbosity-level 1 --input "./data/sequential_ordering/soplib/R.700.1000.60.sop" --format soplib --algorithm iterative-beam-search --certificate solution.txt
+./install/bin/treesearchsolver_sequential_ordering --verbosity-level 1 --input "./data/sequential_ordering/soplib/R.700.1000.60.sop" --format soplib --algorithm iterative-beam-search --certificate solution.txt
 ```
 ```
 ======================================
diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index fbf7569..4e05343 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -5,6 +5,6 @@ include(FetchContent)
 FetchContent_Declare(
     orproblems
     GIT_REPOSITORY https://github.com/fontanf/orproblems.git
-    GIT_TAG e9a58e010f7dc0ca7b5eea2358ed11d386f8622a)
+    GIT_TAG b9e5b32ea612fd2cf23e71de0a969b6dd56ae5d3)
     #SOURCE_DIR "${PROJECT_SOURCE_DIR}/../orproblems/")
 FetchContent_MakeAvailable(orproblems)
diff --git a/scripts/run_tests.py b/scripts/run_tests.py
index 3468e27..c11d0fe 100644
--- a/scripts/run_tests.py
+++ b/scripts/run_tests.py
@@ -18,8 +18,8 @@
     print("-------------------------------")
     print()
 
-    knapsack_with_conflicts_data_dir = os.environ['KNAPSACK_WITH_CONFLICTS_DATA']
-    knapsack_with_conflicts_data = [
+    data_dir = os.environ['KNAPSACK_WITH_CONFLICTS_DATA']
+    data = [
             (os.path.join("hifi2006", "I1 - I10", "1I1"), "hifi2006"),
             (os.path.join("hifi2006", "I1 - I10", "2I2"), "hifi2006"),
             (os.path.join("hifi2006", "I1 - I10", "3I3"), "hifi2006"),
@@ -30,13 +30,13 @@
             (os.path.join("hifi2006", "I1 - I10", "8I3"), "hifi2006"),
             (os.path.join("hifi2006", "I1 - I10", "9I4"), "hifi2006"),
             (os.path.join("hifi2006", "I1 - I10", "10I5"), "hifi2006")]
-    knapsack_with_conflicts_main = os.path.join(
+    main = os.path.join(
             "install",
             "bin",
             "treesearchsolver_knapsack_with_conflicts")
-    for instance, instance_format in knapsack_with_conflicts_data:
+    for instance, instance_format in data:
         instance_path = os.path.join(
-                knapsack_with_conflicts_data_dir,
+                data_dir,
                 instance)
         json_output_path = os.path.join(
                 args.directory,
@@ -45,7 +45,7 @@
         if not os.path.exists(os.path.dirname(json_output_path)):
             os.makedirs(os.path.dirname(json_output_path))
         command = (
-                knapsack_with_conflicts_main
+                main
                 + "  --verbosity-level 1"
                 + "  --input \"" + instance_path + "\""
                 + " --format \"" + instance_format + "\""
@@ -67,8 +67,8 @@
     print("--------------------------------------------------------------")
     print()
 
-    flowshop_scheduling_data_dir = os.environ['FLOWSHOP_SCHEDULING_DATA']
-    permutation_flowshop_scheduling_tct_data = [
+    data_dir = os.environ['FLOWSHOP_SCHEDULING_DATA']
+    data = [
             (os.path.join("taillard1993", "tai20_5_0.txt"), "default"),
             (os.path.join("taillard1993", "tai20_5_1.txt"), "default"),
             (os.path.join("taillard1993", "tai20_5_2.txt"), "default"),
@@ -79,13 +79,13 @@
             (os.path.join("taillard1993", "tai20_5_7.txt"), "default"),
             (os.path.join("taillard1993", "tai20_5_8.txt"), "default"),
             (os.path.join("taillard1993", "tai20_5_9.txt"), "default")]
-    permutation_flowshop_scheduling_tct_main = os.path.join(
+    main = os.path.join(
             "install",
             "bin",
             "treesearchsolver_permutation_flowshop_scheduling_tct")
-    for instance, instance_format in permutation_flowshop_scheduling_tct_data:
+    for instance, instance_format in data:
         instance_path = os.path.join(
-                flowshop_scheduling_data_dir,
+                data_dir,
                 instance)
         json_output_path = os.path.join(
                 args.directory,
@@ -94,7 +94,7 @@
         if not os.path.exists(os.path.dirname(json_output_path)):
             os.makedirs(os.path.dirname(json_output_path))
         command = (
-                permutation_flowshop_scheduling_tct_main
+                main
                 + "  --verbosity-level 1"
                 + "  --input \"" + instance_path + "\""
                 + " --format \"" + instance_format + "\""
@@ -116,8 +116,8 @@
     print("-------------------------------------------------")
     print()
 
-    flowshop_scheduling_data_dir = os.environ['FLOWSHOP_SCHEDULING_DATA']
-    permutation_flowshop_scheduling_makespan_data = [
+    data_dir = os.environ['FLOWSHOP_SCHEDULING_DATA']
+    data = [
             (os.path.join("vallada2015", "Small", "VFR10_5_1_Gap.txt"), "default"),
             (os.path.join("vallada2015", "Small", "VFR10_5_2_Gap.txt"), "default"),
             (os.path.join("vallada2015", "Small", "VFR10_5_3_Gap.txt"), "default"),
@@ -128,13 +128,13 @@
             (os.path.join("vallada2015", "Small", "VFR10_5_8_Gap.txt"), "default"),
             (os.path.join("vallada2015", "Small", "VFR10_5_9_Gap.txt"), "default"),
             (os.path.join("vallada2015", "Small", "VFR10_5_10_Gap.txt"), "default")]
-    permutation_flowshop_scheduling_makespan_main = os.path.join(
+    main = os.path.join(
             "install",
             "bin",
             "treesearchsolver_permutation_flowshop_scheduling_makespan")
-    for instance, instance_format in permutation_flowshop_scheduling_makespan_data:
+    for instance, instance_format in data:
         instance_path = os.path.join(
-                flowshop_scheduling_data_dir,
+                data_dir,
                 instance)
         json_output_path = os.path.join(
                 args.directory,
@@ -143,7 +143,7 @@
         if not os.path.exists(os.path.dirname(json_output_path)):
             os.makedirs(os.path.dirname(json_output_path))
         command = (
-                permutation_flowshop_scheduling_makespan_main
+                main
                 + "  --verbosity-level 1"
                 + "  --input \"" + instance_path + "\""
                 + " --format \"" + instance_format + "\""
@@ -165,8 +165,8 @@
     print("---------------------------")
     print()
 
-    sequential_ordering_data_dir = os.environ['SEQUENTIAL_ORDERING_DATA']
-    sequential_ordering_data = [
+    data_dir = os.environ['SEQUENTIAL_ORDERING_DATA']
+    data = [
             (os.path.join("soplib", "R.200.100.1.sop"), "soplib"),
             (os.path.join("soplib", "R.200.100.15.sop"), "soplib"),
             (os.path.join("soplib", "R.200.100.30.sop"), "soplib"),
@@ -175,13 +175,13 @@
             (os.path.join("soplib", "R.200.1000.15.sop"), "soplib"),
             (os.path.join("soplib", "R.200.1000.30.sop"), "soplib"),
             (os.path.join("soplib", "R.200.1000.60.sop"), "soplib")]
-    sequential_ordering_main = os.path.join(
+    main = os.path.join(
             "install",
             "bin",
             "treesearchsolver_sequential_ordering")
-    for instance, instance_format in sequential_ordering_data:
+    for instance, instance_format in data:
         instance_path = os.path.join(
-                sequential_ordering_data_dir,
+                data_dir,
                 instance)
         json_output_path = os.path.join(
                 args.directory,
@@ -190,7 +190,7 @@
         if not os.path.exists(os.path.dirname(json_output_path)):
             os.makedirs(os.path.dirname(json_output_path))
         command = (
-                sequential_ordering_main
+                main
                 + "  --verbosity-level 1"
                 + "  --input \"" + instance_path + "\""
                 + " --format \"" + instance_format + "\""
@@ -212,8 +212,8 @@
     print("-----------------------------------------")
     print()
 
-    simple_assembly_line_balancing_1_data_dir = os.environ['SIMPLE_ASSEMBLY_LINE_BALANCING_1_DATA']
-    simple_assembly_line_balancing_1_data = [
+    data_dir = os.environ['SIMPLE_ASSEMBLY_LINE_BALANCING_1_DATA']
+    data = [
             (os.path.join("otto2013", "medium data set_n=50", "instance_n=50_50.alb"), "otto2013"),
             (os.path.join("otto2013", "medium data set_n=50", "instance_n=50_100.alb"), "otto2013"),
             (os.path.join("otto2013", "medium data set_n=50", "instance_n=50_150.alb"), "otto2013"),
@@ -224,13 +224,13 @@
             (os.path.join("otto2013", "medium data set_n=50", "instance_n=50_400.alb"), "otto2013"),
             (os.path.join("otto2013", "medium data set_n=50", "instance_n=50_450.alb"), "otto2013"),
             (os.path.join("otto2013", "medium data set_n=50", "instance_n=50_500.alb"), "otto2013")]
-    simple_assembly_line_balancing_1_main = os.path.join(
+    main = os.path.join(
             "install",
             "bin",
             "treesearchsolver_simple_assembly_line_balancing_1")
-    for instance, instance_format in simple_assembly_line_balancing_1_data:
+    for instance, instance_format in data:
         instance_path = os.path.join(
-                simple_assembly_line_balancing_1_data_dir,
+                data_dir,
                 instance)
         json_output_path = os.path.join(
                 args.directory,
@@ -239,7 +239,7 @@
         if not os.path.exists(os.path.dirname(json_output_path)):
             os.makedirs(os.path.dirname(json_output_path))
         command = (
-                simple_assembly_line_balancing_1_main
+                main
                 + "  --verbosity-level 1"
                 + "  --input \"" + instance_path + "\""
                 + " --format \"" + instance_format + "\""