diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index f1dc039..0a08616 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -4,51 +4,21 @@ on:
     branches:
       - '*'
 
-env:
-  CATCH2_REPO_URL : https://github.com/catchorg/Catch2.git
-  CATCH2_BRANCH : v3.4.0
-  TCHECKER_BUILD_TYPE : Debug
-  BUILD_TYPE : Debug
-  NB_CPUS : 2
-  CATCH2_DIRECTORY : ${{ github.workspace }}/tmp/Catch2
-  INSTALL_DIR : ${{ github.workspace }}/tmp/install
-
 jobs:
-  build-and-test:
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        intsize: [int16, int32, int64]
-        compiler: [gcc, clang]
-    name: ${{ matrix.os }} / ${{ matrix.intsize }} / ${{ matrix.compiler }}
-    runs-on: ${{ matrix.os }}
+  build-and-test-linux:
+    name: build-and-test-linux
+    strategy: 
+      matrix: 
+        intsize: ["all:int16:memcheck", "all:int32:memcheck", "all:int64:memcheck"]
+        compiler: ["gcc", "clang"]
+    runs-on: ubuntu-latest
+    container: alzeha/echtzeitsysteme-tchecker-${{ matrix.compiler }}:v0.1
     env:
-      CONFNAME: all:${{ matrix.intsize }}:memcheck
+      CONFNAME: ${{ matrix.intsize }}
+      INSTALL_DIR: "install"
+      TCHECKER_BUILD_TYPE: "Debug"
+      
     steps:
-      - name: Set compiler variables
-        run: |        
-          {
-            if test "${{matrix.compiler}}" = "gcc"; then
-              echo "CC=gcc"
-              echo "CXX=g++"
-              echo "CONFNAME=all:${{ matrix.intsize }}:memcheck"
-            else 
-              echo "CC=clang"
-              echo "CXX=clang++"
-              echo "CONFNAME=all:${{ matrix.intsize }}"
-            fi
-          } >> "$GITHUB_ENV"
-      - name: Getting project repo
-        uses: actions/checkout@v3
-
-      - if: ${{ matrix.os == 'macos-latest' }}
-        run: echo "/usr/local/opt/bison/bin" >> $GITHUB_PATH
-
-      - name: Install pre-requesites
-        run: |
-          ci-scripts/install-$RUNNER_OS.sh
-          ci-scripts/show-config.sh
-      - name: Build TChecker
-        run: ci-scripts/build.sh
-      - name: Testing TChecker
-        run: ci-scripts/test.sh
+      - uses: actions/checkout@v4
+      - name: build-and-test
+        run: ci-scripts/github-ubuntu-build-and-test-${{ matrix.compiler }}.sh
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
deleted file mode 100644
index 80d5306..0000000
--- a/.gitlab-ci.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-variables:
-  INSTALL_DIR: install
-  TCHECKER_BUILD_TYPE: Debug
-
-.build_and_test: &build_and_test
-  - ci-scripts/build.sh
-  - ci-scripts/test.sh
-
-.clang_conf: &clang_conf
-  stage: test
-  image: pictavien/tchecker-ci:clang-latest
-  variables:
-    CC : "clang"
-    CXX : "clang++"
-
-.gcc_conf: &gcc_conf
-  stage: test
-  image: pictavien/tchecker-ci:gcc-latest
-  variables:
-    CC : "gcc"
-    CXX : "g++"
-  artifacts:
-    paths:
-    - build/src/tck-reach
-    - build/src/tck-liveness
-    - build/src/tck-simulate
-    - build/src/tck-syntax
-
-
-gcc_all_int32_no_memcheck:
-  <<: *gcc_conf
-  script:
-    - export CONFNAME="all:int32:no-memcheck"
-    - *build_and_test
-
-gcc_all_int16_no_memcheck:
-  <<: *gcc_conf
-  script:
-    - export CONFNAME="all:int16:no-memcheck"
-    - *build_and_test
-
-gcc_all_int64_memcheck:
-  <<: *gcc_conf
-  script:
-    - export CONFNAME="all:int64:memcheck"
-    - *build_and_test
-
-gcc_simplest_int32_memcheck:
-  <<: *gcc_conf
-  script:
-    - export CONFNAME="smallest:int32:memcheck"
-    - *build_and_test
-
-clang_all_int32_no_memcheck:
-  <<: *clang_conf
-  script:
-    - export CONFNAME="all:int32:no-memcheck"
-    - *build_and_test
-
-
diff --git a/AUTHORS b/AUTHORS
index 44894ec..4084f5d 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1,4 +1,5 @@
-List of contributors to the TChecker projet:
+List of contributors to the TChecker project:
 - Frédéric Herbreteau, Bordeaux INP, fh at labri.fr
 - Gérald POINT, CNRS, gerald.point at labri.fr
 - Ocan Sankur, CNRS, ocan.sankur at irisa.fr
+- Alexander Lieb, TU Darmstadt
diff --git a/ci-scripts/Dockerfile b/ci-scripts/Dockerfile
index b9faeeb..b3dba3f 100644
--- a/ci-scripts/Dockerfile
+++ b/ci-scripts/Dockerfile
@@ -1,66 +1,59 @@
-#
-# build and publish the image with command:
-# docker-image-build-publish.sh
-#
-ARG COMPILER_IMAGE
-ARG LIBBOOST_VERSION=1.81
+FROM ubuntu:latest as base
+ARG CXX
 
-FROM gcc:12 as gcc-12
-ENV CXX=g++
-ENV CC=gcc
-ENV GCC_VERSION=12
-
-RUN apt-get update
-
-FROM gcc:10 as gcc-10
-ENV CXX=g++
-ENV CC=gcc
-ENV GCC_VERSION=10
-ENV LIBBOOST_VERSION=1.74
-
-FROM gcc:11 as gcc-11
-ENV CXX=g++
-ENV CC=gcc
-ENV GCC_VERSION=11
-ENV LIBBOOST_VERSION=1.74
-
-RUN apt-get update
-
-FROM debian:latest as clang-13
-ENV CXX=clang++
-ENV CC=clang
-ENV CLANG_VERSION=13
-ENV LIBBOOST_VERSION=${LIBBOOST_VERSION}
-
-RUN apt-get update && \
-    apt-get install -y clang-${CLANG_VERSION} && \
-    update-alternatives --install /usr/bin/clang clang /usr/bin/clang-${CLANG_VERSION} 1 && \
-    update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-${CLANG_VERSION} 1
-
-FROM ${COMPILER_IMAGE} as target-image
-ARG CATCH2_REV=v3.4.0
-ARG CATCH2_REPO=https://github.com/catchorg/Catch2.git
-ARG COMPILER_IMAGE=${COMPILER_IMAGE}
-
-ENV TCHECKER_DOCKER=true
-ENV TCHECKER_DOCKER_IMAGE="${COMPILER_IMAGE}"
-
-RUN apt-get update && \
-    apt-get install -y \
-    git cmake bison flex doxygen \
-    libboost${LIBBOOST_VERSION}-dev  \
+RUN apt update && \
+    apt install -y \
+    git cmake bison flex doxygen wget \
     valgrind graphviz
 
-RUN if test $(echo  "${LIBBOOST_VERSION}" | tr -d '.') -ge 175; then \
-      apt-get install -y libboost-json${LIBBOOST_VERSION}-dev; \
-    fi
 
-RUN git clone --branch ${CATCH2_REV} ${CATCH2_REPO} /tmp/catch2
+FROM base as gcc-image
+RUN apt install -y gcc-12 g++-12 \
+    build-essential g++ python-dev-is-python3 autotools-dev libicu-dev libbz2-dev && \
+    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 1 && \
+    update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 1
+
+RUN apt --purge remove libboost-all-dev libboost-doc libboost-dev
+
+RUN wget http://downloads.sourceforge.net/project/boost/boost/1.81.0/boost_1_81_0.tar.gz && \
+    tar -zxvf boost_1_81_0.tar.gz && \
+    cd boost_1_81_0/ && \
+    ./bootstrap.sh && \
+    ./b2 --with=all install && \
+    cd ..
+
+RUN git clone --branch v3.2.0 https://github.com/catchorg/Catch2.git /tmp/catch2
 
 RUN mkdir -p /tmp/catch2/build && \
     cd /tmp/catch2/build && \
-    cmake -DCMAKE_CXX_COMPILER=${CXX} .. && \
-    make -j 4 && \
+    cmake -DCMAKE_CXX_COMPILER=g++ .. && \
+    make && \
     make install
 
-ENTRYPOINT [ "/bin/bash", "-s" ]
+ENTRYPOINT ["/bin/bash", "-s"]
+
+FROM base as clang-image
+
+RUN apt install -y clang-13 \
+    build-essential g++ python-dev-is-python3 autotools-dev libicu-dev libbz2-dev && \
+    update-alternatives --install /usr/bin/clang clang /usr/bin/clang-13 1 && \
+    update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-13 1
+
+RUN apt --purge remove libboost-all-dev libboost-doc libboost-dev
+
+RUN wget http://downloads.sourceforge.net/project/boost/boost/1.81.0/boost_1_81_0.tar.gz && \
+    tar -zxvf boost_1_81_0.tar.gz && \
+    cd boost_1_81_0/ && \
+    ./bootstrap.sh && \
+    ./b2 --with=all install && \
+    cd ..
+
+RUN git clone --branch v3.2.0 https://github.com/catchorg/Catch2.git /tmp/catch2
+
+RUN mkdir -p /tmp/catch2/build && \
+    cd /tmp/catch2/build && \
+    cmake -DCMAKE_CXX_COMPILER=clang++ .. && \
+    make && \
+    make install
+
+ENTRYPOINT ["/bin/bash", "-s"]"
diff --git a/ci-scripts/docker-image-build-publish.sh b/ci-scripts/docker-image-build-publish.sh
deleted file mode 100755
index 7fa454a..0000000
--- a/ci-scripts/docker-image-build-publish.sh
+++ /dev/null
@@ -1,108 +0,0 @@
-#! /usr/bin/env bash
-
-GCC_LATEST_IMAGE="gcc-12"
-CLANG_LATEST_IMAGE="clang-13"
-REPOSITORY=pictavien/tchecker-ci
-
-SCRIPTDIR=$(cd $(dirname $0); pwd)
-
-OPT_TAG=NONE
-OPT_GCC_IMAGE=NONE
-OPT_CLANG_IMAGE=NONE
-
-# option set to true if built images have to be pushed on Docker registry
-OPT_PUSH=false
-# option set to true to only display Docker commands
-OPT_DRY=false
-
-usage() {
-  cat <<EOF
-USAGE: $0 [options]
-where options are:
-  -n
-  -p
-  -g gcc-image
-  -c clang-image
-  -t image-tag-suffix
-  -h display this help message
-
-EOF
-  exit 0
-}
-
-error() {
-  echo "$0: error: $1." 1>&2
-  exit 1
-}
-
-parse_args() {
-  OPTIONS=":g:c:t:nph"
-  while getopts ${OPTIONS} opt; do
-    case ${opt} in
-      "g") OPT_GCC_IMAGE=${OPTARG} ;;
-      "c") OPT_CLANG_IMAGE=${OPTARG} ;;
-      "t") OPT_TAG=${OPTARG} ;;
-      "h") usage ;;
-      "p") OPT_PUSH=true ;;
-      "n") OPT_DRY=true ;;
-      ":") error "missing argument to option '${OPTARG}'" ;;
-      "?") error "invalid option '${OPTARG}'" ;;
-    esac
-  done
-
-  if test $((${OPTIND}-1)) -ne $#; then
-    error "wrong # of arguments ($#)"
-  fi
-}
-
-set -eu
-
-parse_args "$@"
-
-GCC_COMPILER_IMAGE=${OPT_GCC_IMAGE}
-CLANG_COMPILER_IMAGE=${OPT_CLANG_IMAGE}
-case ${OPT_TAG} in
-  "latest")
-    GCC_COMPILER_IMAGE=${GCC_LATEST_IMAGE}
-    GCC_TAG=gcc-${OPT_TAG}
-    CLANG_COMPILER_IMAGE=${CLANG_LATEST_IMAGE}
-    CLANG_TAG=clang-${OPT_TAG}
-    ;;
-  "NONE")
-    GCC_TAG=${OPT_GCC_IMAGE}
-    CLANG_TAG=${OPT_CLANG_IMAGE}
-    ;;
-  *)
-    GCC_TAG=gcc-${OPT_TAG}
-    CLANG_TAG=clang-${OPT_TAG}
-    ;;
-esac
-
-if ${OPT_DRY}; then
-  dry="echo"
-else
-  dry=""
-fi
-
-if ${OPT_PUSH}; then
-  push="--push"
-else
-  push=""
-  echo "warning: images are not pushed."
-fi
-
-cd ${SCRIPTDIR}
-if test "${GCC_COMPILER_IMAGE}" != "NONE"; then
-  ${dry} docker build --build-arg "COMPILER_IMAGE=${GCC_COMPILER_IMAGE}" \
-         --target target-image -t ${REPOSITORY}:${GCC_TAG} .
-else
-  echo "no image built for GCC compiler"
-fi
-
-if test "${CLANG_COMPILER_IMAGE}" != "NONE"; then
-  ${dry} docker build --build-arg "COMPILER_IMAGE=${CLANG_COMPILER_IMAGE}" \
-        --target target-image -t ${REPOSITORY}:${CLANG_TAG} .
-else
-  echo "no image built for CLANG compiler"
-fi
-
diff --git a/ci-scripts/github-ubuntu-build-and-test-clang.sh b/ci-scripts/github-ubuntu-build-and-test-clang.sh
new file mode 100755
index 0000000..3429fdf
--- /dev/null
+++ b/ci-scripts/github-ubuntu-build-and-test-clang.sh
@@ -0,0 +1,12 @@
+#!/bin/sh -l
+
+apt update
+apt upgrade -y
+
+export CC="clang"
+export CXX="clang++"
+
+./ci-scripts/build.sh
+./ci-scripts/test.sh
+
+./ci-scripts/show-config.sh
diff --git a/ci-scripts/github-ubuntu-build-and-test-gcc.sh b/ci-scripts/github-ubuntu-build-and-test-gcc.sh
new file mode 100755
index 0000000..0c52f8e
--- /dev/null
+++ b/ci-scripts/github-ubuntu-build-and-test-gcc.sh
@@ -0,0 +1,12 @@
+#!/bin/sh -l
+
+apt update
+apt upgrade -y
+
+export CC="gcc"
+export CXX="g++"
+
+./ci-scripts/build.sh
+./ci-scripts/test.sh
+
+./ci-scripts/show-config.sh
diff --git a/ci-scripts/install-Linux.sh b/ci-scripts/install-Linux.sh
deleted file mode 100755
index 686ad0a..0000000
--- a/ci-scripts/install-Linux.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-
-LIBBOOST_VERSION=1.81
-
-set -eu
-
-sudo apt-get update
-sudo apt-get install -y valgrind
-if ! sudo apt-get install -y libboost${LIBBOOST_VERSION}-dev  \
-     libboost-json${LIBBOOST_VERSION}-dev; then
-  sudo apt-get install -y libboost-dev
-fi
-
-$(dirname $0)/install-sources.sh
diff --git a/ci-scripts/install-macOS.sh b/ci-scripts/install-macOS.sh
deleted file mode 100755
index 93ea6da..0000000
--- a/ci-scripts/install-macOS.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-
-set -eu
-
-brew update
-brew upgrade
-brew install boost@1.81
-brew install bison@3.8
-
-$(dirname $0)/install-sources.sh
-
-
-
-
diff --git a/ci-scripts/install-sources.sh b/ci-scripts/install-sources.sh
deleted file mode 100755
index a7b46b1..0000000
--- a/ci-scripts/install-sources.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-
-set -eux
-
-echo "#### INSTALLING Catch2"
-
-git clone --branch ${CATCH2_BRANCH} ${CATCH2_REPO_URL} ${CATCH2_DIRECTORY} || true
-mkdir -p ${CATCH2_DIRECTORY}/build || true
-
-HERE=${PWD}
-cd ${CATCH2_DIRECTORY}/build
- cmake -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} -DCMAKE_CXX_COMPILER=${CXX} ..
- make -j ${NB_CPUS}
- make install
- ls -R ${INSTALL_DIR}
-cd ${HERE}
-
-
-