diff --git a/.github/actions/benchexec-report/action.yml b/.github/actions/benchexec-report/action.yml
index 57e4311836..6f791acd0f 100644
--- a/.github/actions/benchexec-report/action.yml
+++ b/.github/actions/benchexec-report/action.yml
@@ -6,6 +6,7 @@ runs:
     - name: Checkout repository
       uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
     - name: Install benchexec
+      shell: bash
       run: |
         sudo add-apt-repository ppa:sosy-lab/benchmarking
         sudo apt install benchexec
@@ -15,6 +16,7 @@ runs:
         path: artifacts
     - name: Generate tables
       id: generate
+      shell: bash
       run: |
         cd artifacts
         EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
@@ -44,6 +46,7 @@ runs:
         name: BenchexecResults-${{ matrix.task }}
         path: results
     - name: See PR message
+      shell: bash
       run: |
         echo "${{ steps.generate.outputs.Message }}"
     - name: Comment on PR
diff --git a/.github/actions/benchexec-test/action.yml b/.github/actions/benchexec-test/action.yml
index 6b19cf70aa..76f19d0ec2 100644
--- a/.github/actions/benchexec-test/action.yml
+++ b/.github/actions/benchexec-test/action.yml
@@ -11,21 +11,25 @@ runs:
     - name: Checkout repository
       uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
     - name: Install benchexec and dependencies
+      shell: bash
       run: |
         sudo add-apt-repository ppa:sosy-lab/benchmarking
         sudo apt install benchexec openjdk-17-jre-headless libgomp1 libmpfr-dev
     - name: Get benchmark definition file
+      shell: bash
       run: |
         mkdir -p xml
         wget https://gitlab.com/sosy-lab/sv-comp/bench-defs/-/raw/main/benchmark-defs/theta.xml -P xml
         sed -i 's/<benchmark tool="theta" timelimit="990 s" hardtimelimit="1050 s" memlimit="15 GB" cpuCores="4">/<benchmark tool="theta" timelimit="120 s" hardtimelimit="130 s">/g' xml/theta.xml
     - name: Get sv-benchmarks
+      shell: bash
       run: |
         git clone --filter=blob:none --no-checkout --depth 1 --sparse https://gitlab.com/sosy-lab/benchmarking/sv-benchmarks.git
         cd sv-benchmarks
         git sparse-checkout add c
         git checkout
     - name: Get archive
+      shell: bash
       run: |
         wget https://github.com/ftsrg/theta/releases/download/svcomp23/theta.zip
         unzip theta.zip
@@ -35,15 +39,18 @@ runs:
         name: ThetaJars
         path: jar/
     - name: Add new jar to archive
+      shell: bash
       run: |
         mv jar/xcfa/xcfa-cli/build/libs/*-all.jar theta/theta.jar
         ls -l theta
     - name: Cut setfile if too long
+      shell: bash
       run: |
         cd sv-benchmarks/c
         for i in $(sed 's/#.*$//g' ${{ inputs.task }}.set); do find . -wholename ./$i; done | while read line; do grep "$line" $GITHUB_ACTION_PATH/unsupported.txt >/dev/null 2>/dev/null || echo  $(echo $line | sha1sum | awk ' { print $1 } ') $line ; done | sort -k1 | awk ' { $1=""; print $0 } ' | awk '{$1=$1};1' > all-files.txt
         head -n${{ inputs.test_number }} all-files.txt > ${{ inputs.task }}.set
     - name: Run benchexec
+      shell: bash
       run: |
         benchexec xml/theta.xml --no-container --tool-directory theta -t ${{ inputs.task }}
     - name: Upload results