Add Bitwuzla implementation for prover based shutdown

Author: BaierD

src/org/sosy_lab/java_smt/solvers/bitwuzla/BitwuzlaTheoremProver.java

@@ -17,6 +17,7 @@
 import java.util.Optional;
 import java.util.Set;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.sosy_lab.common.ShutdownManager;
 import org.sosy_lab.common.ShutdownNotifier;
 import org.sosy_lab.java_smt.api.BooleanFormula;
 import org.sosy_lab.java_smt.api.Model;
@@ -38,7 +39,10 @@ class BitwuzlaTheoremProver extends AbstractProverWithAllSat<Void> implements Pr
       new Terminator() {
         @Override
         public boolean terminate() {
-          return shutdownNotifier.shouldShutdown(); // shutdownNotifer is defined in the superclass
+          return proverShutdownManager
+              .getNotifier()
+              .shouldShutdown(); // shutdownNotifer is defined in the
+          // superclass
         }
       };
   private final Bitwuzla env;
@@ -119,7 +123,8 @@ private boolean readSATResult(Result resultValue) throws SolverException, Interr
       return false;
     } else if (resultValue == Result.UNSAT) {
       return true;
-    } else if (resultValue == Result.UNKNOWN && shutdownNotifier.shouldShutdown()) {
+    } else if (resultValue == Result.UNKNOWN
+        && proverShutdownManager.getNotifier().shouldShutdown()) {
       throw new InterruptedException();
     } else {
       throw new SolverException("Bitwuzla returned UNKNOWN.");
@@ -246,6 +251,11 @@ protected BitwuzlaModel getEvaluatorWithoutChecks() {
             Collections2.transform(getAssertedFormulas(), creator::extractInfo)));
   }
 
+  @Override
+  protected ShutdownManager getShutdownManagerForProverImpl() throws UnsupportedOperationException {
+    return proverShutdownManager;
+  }
+
   public boolean isClosed() {
     return closed;
   }