moved network flow

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

src/math/simplex/simplex_def.h

@@ -213,7 +213,6 @@ namespace simplex {
             em.div(delta2, si.m_base_coeff, delta2);
             delta2.neg();
             update_value_core(s, delta2);
-            // TBD m.add(si.m_base_coeff, delta2, si.m_base_coeff); 
         }            
     }    
 

src/smt/theory_diff_logic.h

@@ -38,7 +38,6 @@ Revision History:
 #include"numeral_factory.h"
 #include"smt_clause.h"
 #include"theory_opt.h"
-#include"network_flow.h"
 
 // The DL theory can represent term such as n + k, where n is an enode and k is a numeral.
 namespace smt {

src/smt/theory_diff_logic_def.h

@@ -28,7 +28,6 @@ Revision History:
 #include"ast_pp.h"
 #include"warning.h"
 #include"smt_model_generator.h"
-#include"network_flow_def.h"
 #include"model_implicant.h"
 
 using namespace smt;
@@ -998,6 +997,10 @@ void theory_diff_logic<Ext>::get_implied_bound_antecedents(edge_id bridge_edge,
 
 template<typename Ext>
 inf_eps_rational<inf_rational> theory_diff_logic<Ext>::maximize(theory_var v) {
+
+#ifdef 0
+    // disabled until fixed.
+    
     objective_term const& objective = m_objectives[v];
 
     IF_VERBOSE(1,
@@ -1058,6 +1061,10 @@ inf_eps_rational<inf_rational> theory_diff_logic<Ext>::maximize(theory_var v) {
         IF_VERBOSE(1, verbose_stream() << "Unbounded objective" << std::endl;);
         return inf_eps_rational<inf_rational>::infinity();
     }
+
+#endif
+    return inf_eps_rational<inf_rational>::infinity();
+
 }
 
 template<typename Ext>