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diff --git a/src/opt/mfs/mfsInt.h b/src/opt/mfs/mfsInt.h
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+/**CFile****************************************************************
+
+  FileName    [mfsInt.h]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [The good old minimization with complete don't-cares.]
+
+  Synopsis    [Internal declarations.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: mfsInt.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+ 
+#ifndef __MFS_INT_H__
+#define __MFS_INT_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+////////////////////////////////////////////////////////////////////////
+///                          INCLUDES                                ///
+////////////////////////////////////////////////////////////////////////
+
+#include "abc.h"
+#include "mfs.h"
+#include "aig.h"
+#include "cnf.h"
+#include "satSolver.h"
+
+////////////////////////////////////////////////////////////////////////
+///                         PARAMETERS                               ///
+////////////////////////////////////////////////////////////////////////
+
+#define MFS_FANIN_MAX   10
+
+typedef struct Mfs_Man_t_ Mfs_Man_t;
+struct Mfs_Man_t_
+{
+    // input data
+    Mfs_Par_t *         pPars;
+    Abc_Ntk_t *         pNtk;
+    Aig_Man_t *         pCare;
+    // intermeditate data for the node
+    Vec_Ptr_t *         vRoots;    // the roots of the window
+    Vec_Ptr_t *         vSupp;     // the support of the window
+    Vec_Ptr_t *         vNodes;    // the internal nodes of the window
+    Vec_Int_t *         vProjVars; // the projection variables
+    // solving data
+    Aig_Man_t *         pAigWin;   // window AIG with constraints
+    Cnf_Dat_t *         pCnf;      // the CNF for the window
+    sat_solver *        pSat;      // the SAT solver used 
+    // the result of solving
+    int                 nFanins;   // the number of fanins
+    int                 nWords;    // the number of words
+    int                 nCares;    // the number of care minterms
+    unsigned            uCare[(MFS_FANIN_MAX<=5)?1:1<<(MFS_FANIN_MAX-5)];  // the computed care-set
+    // performance statistics
+    int                 nNodesTried;
+    int                 nNodesBad;
+    int                 nMintsCare;
+    int                 nMintsTotal;
+    // statistics
+    int                 timeWin;
+    int                 timeAig;
+    int                 timeCnf;
+    int                 timeSat;
+};
+
+////////////////////////////////////////////////////////////////////////
+///                         BASIC TYPES                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                      MACRO DEFINITIONS                           ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                    FUNCTION DECLARATIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/*=== mfsMan.c ==========================================================*/
+extern Mfs_Man_t *      Mfs_ManAlloc();
+extern void             Mfs_ManStop( Mfs_Man_t * p );
+extern void             Mfs_ManClean( Mfs_Man_t * p );
+/*=== mfsSat.c ==========================================================*/
+extern void             Abc_NtkMfsSolveSat( Mfs_Man_t * p, Abc_Obj_t * pNode );
+/*=== mfsStrash.c ==========================================================*/
+extern Aig_Man_t *      Abc_NtkConstructAig( Mfs_Man_t * p, Abc_Obj_t * pNode );
+/*=== mfsWin.c ==========================================================*/
+extern Vec_Ptr_t *      Abc_MfsComputeRoots( Abc_Obj_t * pNode, int nWinTfoMax, int nFanoutLimit );
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+