Add OpenSMT2 implementation for prover based shutdown

Author: BaierD

src/org/sosy_lab/java_smt/solvers/opensmt/OpenSmtAbstractProver.java

@@ -20,6 +20,7 @@
 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.Evaluator;
@@ -230,8 +231,9 @@ public boolean isUnsat() throws InterruptedException, SolverException {
     changedSinceLastSatQuery = false;
 
     sstat result;
-    try (ShutdownHook listener = new ShutdownHook(shutdownNotifier, osmtSolver::stop)) {
-      shutdownNotifier.shutdownIfNecessary();
+    try (ShutdownHook listener =
+        new ShutdownHook(proverShutdownManager.getNotifier(), osmtSolver::stop)) {
+      proverShutdownManager.getNotifier().shutdownIfNecessary();
       try {
         result = osmtSolver.check();
       } catch (Exception e) {
@@ -250,7 +252,7 @@ public boolean isUnsat() throws InterruptedException, SolverException {
           throw new SolverException("OpenSMT crashed while checking satisfiability.", e);
         }
       }
-      shutdownNotifier.shutdownIfNecessary();
+      proverShutdownManager.getNotifier().shutdownIfNecessary();
     }
 
     if (result.equals(sstat.Error())) {
@@ -289,4 +291,9 @@ public void close() {
     }
     super.close();
   }
+
+  @Override
+  protected ShutdownManager getShutdownManagerForProverImpl() throws UnsupportedOperationException {
+    return proverShutdownManager;
+  }
 }