diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      - name: Cache
+        uses: actions/cache@v2.1.6
+        with:
+          # A list of files, directories, and wildcard patterns to cache and restore
+          path: ci-tool.jar
+          # An explicit key for restoring and saving the cache
+          key: ${branch}-${commit}
+          # An ordered list of keys to use for restoring the cache if no cache hit occurred for key
+          #restore-keys: # optional
+          # The chunk size used to split up large files during upload, in bytes
+          #upload-chunk-size: # optional
+
+      - name: Setup Java JDK
+        uses: actions/setup-java@v2.1.0
+        with:
+          # The Java version to set up. Takes a whole or semver Java version. See examples of supported syntax in README file
+          java-version: 8
+          # Java distribution. See the list of supported distributions in README file
+          distribution: 'adopt'
+          # The package type (jdk, jre, jdk+fx, jre+fx)
+          java-package: jre
+
+
+     # - name: Check compilation
+     #   run:  javac src/java/util/VerifiedIdentityHashMap.java; true
+
+      # Runs a single command using the runners shell
+      - name: Download KeY's ci-tool
+        run:  wget -O ci-tool.jar  https://formal.iti.kit.edu/weigl/ci-tool/latest.php?type=all
+
+      # Runs a set of commands using the runners shell
+      - name: Run a multi-line script
+        run:  java -jar ci-tool.jar -cp jre --proof-path proofs_new/KeY/IdentityHashMap/ --proof-path proofs_new/KeY/IdentityHashMap_EntrySet/clear --proof-path proofs_new/KeY/IdentityHashMap_KeySet/clear --proof-path proofs_new/KeY/IdentityHashMap_Values/clear  src/java/util/VerifiedIdentityHashMap.java