Install ShadowProver first

.github/workflows/build.yml

@@ -10,17 +10,22 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v3
     
+    steps:
     - name: Set up JDK 8
       uses: actions/setup-java@v3
       with:
         java-version: '8'
         distribution: 'temurin'
     
+    - name: Install ShadowProver
+      run: |
+        git clone https://github.com/rairlab/shadowprover
+        cd shadowprover
+        mvn package install
+    
+    - name: Checkout Spectra
+      uses: actions/checkout@v3
+
     - name: Build With Maven
       run: mvn package
-    
-