adding options to maxres for experiments, include option to pretty print module parameters in smt2 style

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/sat/sat_solver.cpp

@@ -1736,6 +1736,8 @@ namespace sat {
             // initial experiment suggests it has no effect.
 
             m_mus(); // ignore return value on cancelation.
+            m_model.reset();
+            m_model.append(m_mus.get_model());
         }
     }