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_mus.cpp

@@ -31,6 +31,7 @@ namespace sat {
     void mus::reset() {
         m_core.reset();
         m_mus.reset();
+        m_model.reset();
     }
 
     void mus::set_core() {        
@@ -88,6 +89,9 @@ namespace sat {
                 if (!core.empty()) {
                     // mr(); // TBD: measure
                 }
+                if (m_model.empty()) {
+                    m_model.append(s.m_model);
+                }
                 break;
             }
             case l_false:

src/sat/sat_mus.h

@@ -24,6 +24,8 @@ namespace sat {
         literal_vector m_core;
         literal_vector m_mus;
         bool           m_is_active;
+        model          m_model;       // model obtained during minimal unsat core
+
 
         solver& s;
     public:
@@ -31,6 +33,7 @@ namespace sat {
         ~mus();        
         lbool operator()();
         bool is_active() const { return m_is_active; }
+        model const& get_model() const { return m_model; }
     private:
         lbool mus2();
         void mr();

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());
         }
     }