diff --git a/src/CFGraph/CFGraph.cpp b/src/CFGraph/CFGraph.cpp
index c6290ce..e266f3c 100644
--- a/src/CFGraph/CFGraph.cpp
+++ b/src/CFGraph/CFGraph.cpp
@@ -1162,8 +1162,9 @@ map<FuncInfo*, vector<BBlock*>> buildCFG(const map<string, CommonBlock*>& common
     if (SgFile::switchToFile(oldFile) == -1)
         printInternalError(convertFileName(__FILE__).c_str(), __LINE__);
 
-    for (auto& [func, blocks] : result)
-        removedUnreachableBlocks(blocks);
+    if (!settings.withUnreachable) 
+        for (auto& [func, blocks] : result)
+            removedUnreachableBlocks(blocks);
 
     return result;
 }
diff --git a/src/CFGraph/CFGraph.h b/src/CFGraph/CFGraph.h
index 20608d2..0bd5259 100644
--- a/src/CFGraph/CFGraph.h
+++ b/src/CFGraph/CFGraph.h
@@ -112,7 +112,8 @@ namespace SAPFOR
                        CFG_withDVM = 5, 
                        CFG_withCallsInBlocks = 6, 
                        CFG_withCallFrom = 7, 
-                       CFG_withDominators = 8 };
+                       CFG_withDominators = 8, 
+                       CFG_withUnreachable = 9 };
 
         bool atLeastOneIterInLoop = false;
         bool withRD =               false;
@@ -122,6 +123,7 @@ namespace SAPFOR
         bool withCallsInBlocks =    false; // separate each F_CALL to own BasicBlock
         bool withCallFrom =         false;
         bool withDominators =       false;
+        bool withUnreachable =      false;
 
         explicit CFG_Settings(const std::set<setting> &settings = { CFG_withRD, CFG_withCallFrom, CFG_withDominators })
         {
@@ -143,6 +145,8 @@ namespace SAPFOR
                     withCallFrom = true;
                 else if (set == CFG_withDominators)
                     withDominators = true;
+                else if (set == CFG_withUnreachable)
+                    withUnreachable = true;
                 else
                     printInternalError(convertFileName(__FILE__).c_str(), __LINE__);
             }
diff --git a/src/DirectiveProcessing/shadow.cpp b/src/DirectiveProcessing/shadow.cpp
index 07cd69d..6c047c6 100644
--- a/src/DirectiveProcessing/shadow.cpp
+++ b/src/DirectiveProcessing/shadow.cpp
@@ -1673,7 +1673,8 @@ void GroupShadow(const map<string, vector<FuncInfo*>>& allFuncs,
         
             SgStatement* func = currF->funcPointer->GetOriginal();
 
-            const auto settings = CFG_Settings({ CFG_Settings::CFG_atLeastOneIterInLoop, CFG_Settings::CFG_withSPF, CFG_Settings::CFG_withCallsInBlocks });
+            const auto settings = CFG_Settings({ CFG_Settings::CFG_atLeastOneIterInLoop, CFG_Settings::CFG_withSPF, 
+                                                 CFG_Settings::CFG_withCallsInBlocks, CFG_Settings::CFG_withUnreachable });
             auto cfg = buildCFGforCurrentFunc(func, settings, commonBlocks, allFuncs);
             if (cfg.size() != 1)
                 printInternalError(convertFileName(__FILE__).c_str(), __LINE__);
diff --git a/src/Utils/version.h b/src/Utils/version.h
index 6c1461d..7203a9c 100644
--- a/src/Utils/version.h
+++ b/src/Utils/version.h
@@ -1,3 +1,3 @@
 #pragma once
 
-#define VERSION_SPF "2462"
+#define VERSION_SPF "2463"