Generate SVCOMP witness if PROGRAM_SPEC is the only property (#615)

Signed-off-by: Hernan Ponce de Leon <[email protected]>

Author: hernanponcedeleon

dartagnan/src/main/java/com/dat3m/dartagnan/Dartagnan.java

@@ -215,7 +215,7 @@ private static void generateWitnessIfAble(VerificationTask task, ProverEnvironme
         // ------------------ Generate Witness, if possible ------------------
         final EnumSet<Property> properties = task.getProperty();
         if (task.getProgram().getFormat().equals(SourceLanguage.LLVM) && modelChecker.hasModel()
-                && properties.contains(PROGRAM_SPEC)) {
+                && properties.contains(PROGRAM_SPEC) && properties.size() == 1) {
             try {
                 WitnessBuilder w = WitnessBuilder.of(modelChecker.getEncodingContext(), prover,
                         modelChecker.getResult(), summary);