diff --git a/abclib.dsp b/abclib.dsp
index c069e7e2d..d7c19e48c 100644
--- a/abclib.dsp
+++ b/abclib.dsp
@@ -2034,54 +2034,6 @@ SOURCE=.\src\sat\bmc\bmcUnroll.c
 
 # PROP Default_Filter ""
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-# PROP Default_Filter ""
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-SOURCE=.\src\sat\xsat\xsat.h
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-SOURCE=.\src\sat\xsat\xsatBQueue.h
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-SOURCE=.\src\sat\xsat\xsatClause.h
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-# Begin Source File
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-SOURCE=.\src\sat\xsat\xsatCnfReader.c
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-SOURCE=.\src\sat\xsat\xsatHeap.h
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-SOURCE=.\src\sat\xsat\xsatMemory.h
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-SOURCE=.\src\sat\xsat\xsatSolver.c
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-SOURCE=.\src\sat\xsat\xsatSolver.h
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-SOURCE=.\src\sat\xsat\xsatSolverAPI.c
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-SOURCE=.\src\sat\xsat\xsatUtils.h
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-SOURCE=.\src\sat\xsat\xsatWatchList.h
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 # Begin Group "satoko"
 
 # PROP Default_Filter ""
@@ -2170,6 +2122,54 @@ SOURCE=.\src\sat\satoko\utils\vec\vec_uint.h
 SOURCE=.\src\sat\satoko\watch_list.h
 # End Source File
 # End Group
+# Begin Group "xsat"
+
+# PROP Default_Filter ""
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsat.h
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsatBQueue.h
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsatClause.h
+# End Source File
+# Begin Source File
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+SOURCE=.\src\sat\xsat\xsatCnfReader.c
+# End Source File
+# Begin Source File
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+SOURCE=.\src\sat\xsat\xsatHeap.h
+# End Source File
+# Begin Source File
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+SOURCE=.\src\sat\xsat\xsatMemory.h
+# End Source File
+# Begin Source File
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+SOURCE=.\src\sat\xsat\xsatSolver.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsatSolver.h
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsatSolverAPI.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsatUtils.h
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\sat\xsat\xsatWatchList.h
+# End Source File
+# End Group
 # End Group
 # Begin Group "opt"