re-organize muz_qe into separate units

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

src/muz/bmc/dl_bmc_engine.h

@@ -0,0 +1,82 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    dl_bmc_engine.h
+
+Abstract:
+
+    BMC engine for fixedpoint solver.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2012-9-20
+
+Revision History:
+
+--*/
+
+#ifndef _DL_BMC_ENGINE_H_
+#define _DL_BMC_ENGINE_H_
+
+#include "params.h"
+#include "statistics.h"
+#include "smt_kernel.h"
+#include "bv_decl_plugin.h"
+#include "smt_params.h"
+
+
+namespace datalog {
+    class context;
+
+    class bmc : public engine_base {
+        context&         m_ctx;
+        ast_manager&     m;
+        smt_params       m_fparams;
+        smt::kernel      m_solver;
+        rule_set         m_rules;
+        func_decl_ref    m_query_pred;
+        expr_ref         m_answer;
+        volatile bool    m_cancel;
+
+        void checkpoint();
+
+        class nonlinear_dt;
+        class nonlinear;
+        class qlinear;
+        class linear;
+
+        bool is_linear() const;
+        
+        void assert_expr(expr* e);
+
+
+    public:
+        bmc(context& ctx);
+
+        ~bmc();
+
+        lbool query(expr* query);
+
+        void cancel();
+
+        void cleanup();
+
+        void display_certificate(std::ostream& out) const;
+
+        void collect_statistics(statistics& st) const;
+
+        void reset_statistics(); 
+
+        expr_ref get_answer();
+
+        // direct access to (new) non-linear compiler.
+        void compile(rule_set const& rules, expr_ref_vector& fmls, unsigned level);
+        expr_ref compile_query(func_decl* query_pred, unsigned level);
+    };
+};
+
+
+
+#endif