diff --git a/.gitignore b/.gitignore
index 0000101..d9bf98a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,6 +74,7 @@ Sapfor/Sapc++/Sapc++/x64/
 Sapfor/Sapc++/x64/
 
 /build
+/cmake-build-debug
 
 Sapfor/out/
 Sapfor/_bin/*
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4332009..6eada33 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -113,7 +113,13 @@ set(OMEGA src/SageAnalysisTool/OmegaForSage/add-assert.cpp
         src/SageAnalysisTool/set.cpp)
 
 set(PRIV src/PrivateAnalyzer/private_analyzer.cpp
-        src/PrivateAnalyzer/private_analyzer.h)
+        src/PrivateAnalyzer/private_analyzer.h
+        src/PrivateAnalyzer/private_arrays_search.cpp
+        src/PrivateAnalyzer/private_arrays_search.h
+        src/PrivateAnalyzer/range_structures.cpp
+        src/PrivateAnalyzer/range_structures.h
+        src/PrivateAnalyzer/region.cpp
+        src/PrivateAnalyzer/region.h)
 
 set(FDVM ${fdvm_sources}/acc.cpp
          ${fdvm_sources}/acc_across.cpp
diff --git a/src/CFGraph/IR.cpp b/src/CFGraph/IR.cpp
index 76de087..4b24610 100644
--- a/src/CFGraph/IR.cpp
+++ b/src/CFGraph/IR.cpp
@@ -395,7 +395,7 @@ static SAPFOR::Argument* processExpression(SgExpression* ex, vector<IR_Block*>&
     if (ex)
     {
         const int var = ex->variant();
-        if ((var == VAR_REF || var == CONST_REF || var == LABEL_REF) && !ex->lhs() && !ex->rhs()) // обращение к переменной
+        if ((var == VAR_REF || var == CONST_REF || var == LABEL_REF) && !ex->lhs() && !ex->rhs()) // variable reference
         {
             if (var == CONST_REF)
             {
@@ -450,7 +450,7 @@ static SAPFOR::Argument* processExpression(SgExpression* ex, vector<IR_Block*>&
                 return arg1;
 
             auto reg = isLeft ? NULL : createRegister();
-            Instruction* instr = new Instruction(isLeft ? CFG_OP::STORE : CFG_OP::LOAD, arg1, createConstArg(numArgs), isLeft ? isLeft : reg);
+            Instruction* instr = new Instruction(isLeft ? CFG_OP::STORE : CFG_OP::LOAD, arg1, createConstArg(numArgs), isLeft ? isLeft : reg, NULL, ex);
             blocks.push_back(new IR_Block(instr));
             return reg;
         }
@@ -485,7 +485,7 @@ static SAPFOR::Argument* processExpression(SgExpression* ex, vector<IR_Block*>&
             auto arg1 = arrayRef ? arrayRef : createArrayArg(ref, blocks, func, numArgs, commonVars);
 
             auto reg = isLeft ? NULL : createRegister();
-            instr = new Instruction(isLeft ? CFG_OP::STORE : CFG_OP::LOAD, arg1, createConstArg(1), isLeft ? isLeft : reg);
+            instr = new Instruction(isLeft ? CFG_OP::STORE : CFG_OP::LOAD, arg1, createConstArg(1), isLeft ? isLeft : reg, NULL, ex);
             blocks.push_back(new IR_Block(instr));
             return reg;
         }
@@ -602,7 +602,7 @@ static SAPFOR::Argument* processExpression(SgExpression* ex, vector<IR_Block*>&
                 {
                     if (returnReg == NULL)
                     {
-                        Instruction* instr = new Instruction(CFG_OP::LOAD, arg, NULL, reg);
+                        Instruction* instr = new Instruction(CFG_OP::LOAD, arg, NULL, reg, NULL, ex);
                         blocks.push_back(new IR_Block(instr));
                     }
                     else
@@ -1572,7 +1572,7 @@ vector<IR_Block*> buildIR(SgStatement* function, const FuncInfo* func, const vec
     else
         findReturn(0, blocks.size(), blocks, blocks.back()->getNumber());
 
-    // добавление связей по GOTO и переходам
+    // adding links by GOTO and jumps
     for (int z = 0; z < blocks.size(); ++z)
     {
         auto op = blocks[z]->getInstruction()->getOperation();
@@ -1592,7 +1592,7 @@ vector<IR_Block*> buildIR(SgStatement* function, const FuncInfo* func, const vec
 
                 blocks[z]->setJump(it->second);
 
-                // заменим метку на номер инструкции
+                // replacing the label with the instruction number
                 arg->setValue(to_string(it->second->getNumber())); 
                 arg->setType(CFG_ARG_TYPE::INSTR);
             }
diff --git a/src/Distribution/Array.h b/src/Distribution/Array.h
index 8f77faf..74a8a08 100644
--- a/src/Distribution/Array.h
+++ b/src/Distribution/Array.h
@@ -827,4 +827,4 @@ namespace Distribution
 #undef PAIR
 #undef MAP
 #undef SET
-#undef TO_STR
\ No newline at end of file
+#undef TO_STR
diff --git a/src/LoopAnalyzer/loop_analyzer.cpp b/src/LoopAnalyzer/loop_analyzer.cpp
index 4088a5c..a544fca 100644
--- a/src/LoopAnalyzer/loop_analyzer.cpp
+++ b/src/LoopAnalyzer/loop_analyzer.cpp
@@ -1635,9 +1635,9 @@ void loopAnalyzer(SgFile *file, vector<ParallelRegion*> &regions, map<tuple<int,
         string fName = file->functions(i)->symbol()->identifier();
 #if _WIN32
         if (file->functions(i)->variant() != MODULE_STMT)
-            sendMessage_2lvl(wstring(L"��������� ������� '") + wstring(fName.begin(), fName.end()) + L"'");
+            sendMessage_2lvl(wstring(L"обработка функции '") + wstring(fName.begin(), fName.end()) + L"'");
         else
-            sendMessage_2lvl(wstring(L"��������� ������ '") + wstring(fName.begin(), fName.end()) + L"'");
+            sendMessage_2lvl(wstring(L"обработка модуля '") + wstring(fName.begin(), fName.end()) + L"'");
 #else
         if (file->functions(i)->variant() != MODULE_STMT)
             sendMessage_2lvl(wstring(L"processing function '") + wstring(fName.begin(), fName.end()) + L"'");
@@ -1710,7 +1710,10 @@ void loopAnalyzer(SgFile *file, vector<ParallelRegion*> &regions, map<tuple<int,
         map<string, pair<SgSymbol*, SgStatement*>> notMappedDistributedArrays;
         set<string> mappedDistrbutedArrays;
 
+        const ParallelRegionLines* prevParLines = NULL;
+        double prevLinesWeight = 1.0;
         double currentWeight = 1.0;
+
         while (st != lastNode)
         {
             createNeededException();
@@ -1733,13 +1736,31 @@ void loopAnalyzer(SgFile *file, vector<ParallelRegion*> &regions, map<tuple<int,
             }
 
             const int currentLine = st->lineNumber() < -1 ? st->localLineNumber() : st->lineNumber();
-            ParallelRegion *currReg = getRegionByLine(regions, st->fileName(), currentLine);
+            auto regAndLines = getRegionAndLinesByLine(regions, st->fileName(), currentLine);
+
+            auto *currReg = regAndLines.first;
+            auto *parLines = regAndLines.second;
             if (currReg == NULL)
             {
                 st = st->lexNext();
                 continue;
             }
 
+            if (parLines != prevParLines)
+            {
+                prevParLines = parLines;
+                auto newParLinesWeight = parLines ? parLines->weight : 1.0;
+
+                if (prevParLines)
+                    currentWeight /= prevLinesWeight;
+
+                if (parLines)
+                    currentWeight *= newParLinesWeight;
+
+                prevLinesWeight = newParLinesWeight;
+                prevParLines = parLines;
+            }
+
             if (isSgExecutableStatement(st) == NULL)
                 delcsStatViewed.insert(st);
             else if (!sharedMemoryParallelization && 
@@ -2168,7 +2189,7 @@ void loopAnalyzer(SgFile *file, vector<ParallelRegion*> &regions, map<tuple<int,
                 {
                     string fName = file->functions(i)->symbol()->identifier();
 #ifdef _WIN32
-                    sendMessage_2lvl(wstring(L"��������� ����� ") + std::to_wstring(idx) + L"/" + std::to_wstring(convertedLoopInfo.size()));
+                    sendMessage_2lvl(wstring(L"обработка цикла ") + std::to_wstring(idx) + L"/" + std::to_wstring(convertedLoopInfo.size()));
 #else
                     sendMessage_2lvl(wstring(L"processing loop ") + std::to_wstring(idx) + L"/" + std::to_wstring(convertedLoopInfo.size()));
 #endif
diff --git a/src/ParallelizationRegions/ParRegions.cpp b/src/ParallelizationRegions/ParRegions.cpp
index 85d1953..f01be39 100644
--- a/src/ParallelizationRegions/ParRegions.cpp
+++ b/src/ParallelizationRegions/ParRegions.cpp
@@ -93,8 +93,10 @@ static inline SgStatement* getParentStat(SgStatement *st)
     return iterator;
 }
 
-static void updateRegionInfo(SgStatement *st, map<string, pair<Statement*, Statement*>> &startEnd, map<string, pair<int, int>> &lines_,
-                             set<string> &funcCallFromReg, const map<string, FuncInfo*> &mapFuncs)
+static void updateRegionInfo(SgStatement *st, map<string, pair<Statement*, Statement*>> &startEnd,
+                             map<string, pair<int, int>> &lines_,
+                             map<string, map<string, set<int>>> &funcCallFromReg,
+                             const map<string, FuncInfo*> &mapFuncs)
 {    
     string containsPrefix = "";
     SgStatement *st_ps = getParentStat(st);
@@ -103,17 +105,26 @@ static void updateRegionInfo(SgStatement *st, map<string, pair<Statement*, State
         containsPrefix = st_ps->symbol()->identifier() + string(".");
 
     extendRegionInfo(st, startEnd, lines_);
+
+    set<string> callsFromStatement;
+
     if (st->variant() == PROC_STAT)
     {
         string fullName = st->symbol()->identifier();
         //check contains
         if (mapFuncs.find(containsPrefix + fullName) != mapFuncs.end())
             fullName = containsPrefix + fullName;
-        funcCallFromReg.insert(fullName);
+        callsFromStatement.insert(fullName);
     }
 
     for (int z = 0; z < 3; ++z)
-        findFuncCalls(st->expr(z), funcCallFromReg, containsPrefix, mapFuncs);
+        findFuncCalls(st->expr(z), callsFromStatement, containsPrefix, mapFuncs);
+
+    string filename = st->fileName();
+    int line = st->lineNumber();
+
+    for (const auto &func_name : callsFromStatement)
+        funcCallFromReg[func_name][filename].insert(line);
 }
 
 static void fillArrayNamesInReg(set<string> &usedArrayInRegion, SgExpression *exp)
@@ -318,8 +329,9 @@ void fillRegionLines(SgFile *file, vector<ParallelRegion*> &regions, vector<Mess
     string regionName = "";
     map<string, pair<Statement*, Statement*>> startEnd;
     map<string, pair<int, int>> lines_;
-    set<string> funcCallFromReg;
+    map<string, map<string, set<int>>> funcCallFromReg;
     bool regionStarted = false;
+    double fragmentWeight = 1.0;
 
     vector<SgStatement*> toDel;
     for (int i = 0; i < funcNum; ++i)
@@ -368,6 +380,33 @@ void fillRegionLines(SgFile *file, vector<ParallelRegion*> &regions, vector<Mess
                         itFunc->second->callRegions.insert(0);
                     }
                 }
+
+                // parse SPF_APPLY_FRAGMENT clause
+                auto *apply_fragment = data->expr(1);
+                fragmentWeight = 1.0;
+
+                while (apply_fragment)
+                {
+                    auto *curr = apply_fragment->lhs();
+                    if (curr)
+                    {
+                        __spf_print(1, "%s %d\n", curr->unparse(), curr->variant());
+
+                        if (curr->variant() == SPF_WEIGHT_OP)
+                        {
+                            if (curr->lhs() &&
+                                isSgValueExp(curr->lhs()) &&
+                                isSgValueExp(curr->lhs())->doubleValue())
+                            {
+                                fragmentWeight = strtod(isSgValueExp(curr->lhs())->doubleValue(), NULL);
+                                __spf_print(1, "->> %lf\n", fragmentWeight);
+                            }
+                            else
+                                __spf_print(1, "WEIGHT clause without double argument\n");
+                        }
+                    }
+                    apply_fragment = apply_fragment->rhs();
+                }
             }
 
             if (next && next->variant() == SPF_END_PARALLEL_REG_DIR)
@@ -400,10 +439,12 @@ void fillRegionLines(SgFile *file, vector<ParallelRegion*> &regions, vector<Mess
 
                 extendRegionInfo(st, startEnd, lines_, true);
                 for (auto itRegInfo = startEnd.begin(); itRegInfo != startEnd.end(); ++itRegInfo)
-                    currReg->AddLines(lines_[itRegInfo->first], itRegInfo->first, &itRegInfo->second);
+                    currReg->AddLines(lines_[itRegInfo->first], itRegInfo->first, &itRegInfo->second, fragmentWeight);
 
-                for (auto &func : funcCallFromReg)
-                    currReg->AddFuncCalls(func);
+                for (auto &by_func : funcCallFromReg)
+                    for (auto &by_file : by_func.second)
+                        for(auto &by_line : by_file.second)
+                            currReg->AddFuncCalls(by_func.first, by_file.first, by_line);
 
                 filterUserDirectives(currReg, usedArrayInRegion, userDvmRedistrDirs, userDvmRealignDirs, userDvmShadowDirs);
                 currReg->AddUserDirectives(userDvmRealignDirs, DVM_REALIGN_DIR);
@@ -496,34 +537,48 @@ void fillRegionLinesStep2(vector<ParallelRegion*> &regions, const map<string, ve
     {
         if (regions[i]->GetName() != "DEFAULT")
             for (auto &func : regions[i]->GetFuncCalls())
-                setExplicitFlag(func, funcMap);        
+                setExplicitFlag(func.first, funcMap);
     }
 
     for (int i = 0; i < regions.size(); ++i)
     {
         if (regions[i]->GetName() != "DEFAULT")
         {
-            set<string> uniqFuncCalls;
-            for (auto &elem : regions[i]->GetFuncCalls())
-                uniqFuncCalls.insert(elem);
+            map<string, double> uniqFuncCalls;
+            map<string, map<string, set<int>>> callPlaces;
+
+            for (auto &elem : regions[i]->GetFuncCalls())
+            {
+                double max_weight = 0;
+                for (auto* fragment : elem.second)
+                    if (fragment->weight > max_weight)
+                        max_weight = fragment->weight;
+
+                uniqFuncCalls[elem.first] = max_weight;
+            }
+
+            bool wasChanged = true;
+            auto funcsBefore = uniqFuncCalls;
 
-            bool wasChanged = 1;
             while (wasChanged)
             {
-                wasChanged = 0;
+                wasChanged = false;
+                auto updated = uniqFuncCalls;
+
                 for (auto &uniqF : uniqFuncCalls)
                 {
-                    auto func = funcMap.find(uniqF);
+                    auto func = funcMap.find(uniqF.first);
                     if (func != funcMap.end())
                     {
-                        for (auto &calls : func->second->callsFrom)
+                        for (auto &call : func->second->callsFromDetailed)
                         {
-                            auto it = uniqFuncCalls.find(calls);
-                            if (it == uniqFuncCalls.end())
-                            {
-                                uniqFuncCalls.insert(it, calls);
-                                wasChanged = 1;
-                            }
+                            auto it = updated.find(call.detailCallsFrom.first);
+                            if (it == updated.end())
+                                updated.insert({call.detailCallsFrom.first, uniqF.second});
+                            else
+                                it->second = std::max(it->second, uniqF.second);
+
+                            callPlaces[call.detailCallsFrom.first][func->second->fileName].insert(call.detailCallsFrom.second);
                         }
                     }
                 }
@@ -532,21 +587,27 @@ void fillRegionLinesStep2(vector<ParallelRegion*> &regions, const map<string, ve
             string toPrint = "";
             for (auto &elem : uniqFuncCalls)
             {
-                auto it = funcMap.find(elem);
+                auto it = funcMap.find(elem.first);
                 if (it != funcMap.end())
                 {
-                    regions[i]->AddLines(it->second->linesNum, it->second->fileName);
-                    regions[i]->AddFuncCallsToAllCalls(it->second);
+                    regions[i]->AddLines(it->second->linesNum, it->second->fileName, NULL, elem.second);
 
                     if (it->second->inRegion == 0)
                         it->second->inRegion = 2;
 
                     it->second->callRegions.insert(i);
 
-                    toPrint += elem + " ";
+                    toPrint += elem.first + " ";
                 }
             }
 
+            for (auto &elem : callPlaces)
+            {
+                for (const auto &byFile : elem.second)
+                    for (auto byLine : byFile.second)
+                        regions[i]->AddFuncCalls(elem.first, byFile.first, byLine);
+            }
+
             if (toPrint != "")
                 __spf_print(1, "[%s]: funcs: %s\n", regions[i]->GetName().c_str(), toPrint.c_str());
         }
diff --git a/src/ParallelizationRegions/ParRegions.h b/src/ParallelizationRegions/ParRegions.h
index fc72c3d..d613d31 100644
--- a/src/ParallelizationRegions/ParRegions.h
+++ b/src/ParallelizationRegions/ParRegions.h
@@ -19,7 +19,7 @@
 
 struct ParallelRegionLines
 {
-    ParallelRegionLines() 
+    ParallelRegionLines(double weight = 1.0) : weight(weight)
     {
         lines = std::make_pair(-1, -1);
         stats = std::make_pair<Statement*, Statement*>(NULL, NULL);
@@ -27,14 +27,15 @@ struct ParallelRegionLines
         intervalAfter = std::make_pair<Statement*, Statement*>(NULL, NULL);
     }
 
-    ParallelRegionLines(const std::pair<int, int> &lines) : lines(lines) 
+    ParallelRegionLines(const std::pair<int, int> &lines, double weight = 1.0) : lines(lines), weight(weight)
     {
         stats = std::make_pair<Statement*, Statement*>(NULL, NULL);
         intervalBefore = std::make_pair<Statement*, Statement*>(NULL, NULL);
         intervalAfter = std::make_pair<Statement*, Statement*>(NULL, NULL);
     }
 
-    ParallelRegionLines(const std::pair<int, int> &lines, const std::pair<Statement*, Statement*> stats) : lines(lines), stats(stats)
+    ParallelRegionLines(const std::pair<int, int> &lines, const std::pair<Statement*, Statement*> stats, double weight = 1.0)
+        : lines(lines), stats(stats), weight(weight)
     {
         intervalBefore = std::make_pair<Statement*, Statement*>(NULL, NULL);
         intervalAfter = std::make_pair<Statement*, Statement*>(NULL, NULL);
@@ -62,6 +63,8 @@ struct ParallelRegionLines
     // <start, end> interval
     std::pair<Statement*, Statement*> intervalBefore;
     std::pair<Statement*, Statement*> intervalAfter;
+
+    double weight; // weight of the fragment among all fragments of this region
 };
 
 #if __SPF
@@ -116,7 +119,7 @@ public:
         currentVariant = copy.currentVariant;
     }
 
-    int AddLines(const std::pair<int, int> &linesToAdd, const std::string &file, const std::pair<Statement*, Statement*> *startEnd = NULL)
+    int AddLines(const std::pair<int, int> &linesToAdd, const std::string &file, const std::pair<Statement*, Statement*> *startEnd = NULL, double weight = 1.0)
     {
         if (linesToAdd.first > linesToAdd.second)
             return -1;
@@ -126,17 +129,29 @@ public:
             it = lines.insert(it, make_pair(file, std::vector<ParallelRegionLines>()));
 
         if (startEnd)
-            it->second.push_back(ParallelRegionLines(linesToAdd, *startEnd));
+            it->second.push_back(ParallelRegionLines(linesToAdd, *startEnd, weight));
         else
-            it->second.push_back(ParallelRegionLines(linesToAdd));
+            it->second.push_back(ParallelRegionLines(linesToAdd, weight));
 
         return 0;
     }
 
-    void AddFuncCalls(const std::string &func) { functionsCall.insert(func); }
+    void AddFuncCalls(const std::string &func, const std::string &file, const int line)
+    {
+        auto *found_lines = GetLinesByLine(file, line);
+
+        if (found_lines)
+            functionsCall[func].insert(found_lines);
+    }
 
 #if __SPF
-    void AddFuncCallsToAllCalls(FuncInfo *func) { allFunctionsCall.insert(func); }
+    void AddFuncCallsToAllCalls(FuncInfo *func, const std::string &file, const int line)
+    {
+        auto *found_lines = GetLinesByLine(file, line);
+
+        if (found_lines)
+            allFunctionsCall[func].insert(found_lines);
+    }
 #endif
 
     uint64_t GetId() const { return regionId; }
@@ -176,10 +191,10 @@ public:
     const DataDirective& GetDataDir() const { return dataDirectives; }
     DataDirective& GetDataDirToModify() { return dataDirectives; }
 
-    const std::set<std::string>& GetFuncCalls() const { return functionsCall; }
+    const std::map<std::string, std::set<const ParallelRegionLines*>>& GetFuncCalls() const { return functionsCall; }
 
 #if __SPF
-    const std::set<FuncInfo*>& GetAllFuncCalls() const { return allFunctionsCall; }
+    const std::map<FuncInfo*, std::set<const ParallelRegionLines*>>& GetAllFuncCalls() const { return allFunctionsCall; }
     const std::map<FuncInfo*, std::map<DIST::Array*, std::vector<ParallelRegionLines>>>& GetUsedLocalArrays() const { return usedLocalArrays; }
     const std::map<FuncInfo*, std::map<DIST::Array*, std::vector<ParallelRegionLines>>>& GetUsedCommonArrays() const { return usedCommonArrays; }
 
@@ -218,7 +233,7 @@ public:
     }
 #endif
 
-    bool HasThisLine(const int line, const std::string &file) const
+    bool HasThisLine(const int line, const std::string &file, const ParallelRegionLines** found = nullptr) const
     {
         bool retVal = false;
         auto it = lines.find(file);
@@ -229,6 +244,9 @@ public:
                 if (it->second[i].lines.first <= line && it->second[i].lines.second >= line)
                 {
                     retVal = true;
+                    if (found)
+                        *found = &(it->second[i]);
+
                     break;
                 }
             }
@@ -292,7 +310,7 @@ public:
         fprintf(fileOut, "  originalName '%s'\n", originalName.c_str());
         fprintf(fileOut, "  functions call from %d:\n", (int)functionsCall.size());
         for (auto &func : functionsCall)
-            fprintf(fileOut, "    '%s'\n", func.c_str());
+            fprintf(fileOut, "    '%s'\n", func.first.c_str());
         fprintf(fileOut, "  total lines %d:\n", (int)lines.size());
         for (auto &line : lines)
         {
@@ -362,11 +380,11 @@ private:
     std::string originalName;
     // file -> lines info
     std::map<std::string, std::vector<ParallelRegionLines>> lines;
-    std::set<std::string> functionsCall;
+    std::map<std::string, std::set<const ParallelRegionLines*>> functionsCall; // func name -> fragments with calls
 
 #if __SPF
     // for RESOLVE_PAR_REGIONS
-    std::set<FuncInfo*> allFunctionsCall;
+    std::map<FuncInfo*, std::set<const ParallelRegionLines*>> allFunctionsCall; // function -> fragments with calls
     std::map<FuncInfo*, std::map<DIST::Array*, std::vector<ParallelRegionLines>>> usedLocalArrays;  // func -> array -> lines
     std::map<FuncInfo*, std::map<DIST::Array*, std::vector<ParallelRegionLines>>> usedCommonArrays; // func -> array -> lines
     //
@@ -408,4 +426,5 @@ private:
 ParallelRegion* getRegionById(const std::vector<ParallelRegion*>& regions, const uint64_t regionId);
 ParallelRegion* getRegionByName(const std::vector<ParallelRegion*>& regions, const std::string& regionName);
 ParallelRegion* getRegionByLine(const std::vector<ParallelRegion*>& regions, const std::string& file, const int line);
+std::pair<ParallelRegion*, const ParallelRegionLines*> getRegionAndLinesByLine(const std::vector<ParallelRegion*>& regions, const std::string& file, const int line);
 std::set<ParallelRegion*> getAllRegionsByLine(const std::vector<ParallelRegion*>& regions, const std::string& file, const int line);
\ No newline at end of file
diff --git a/src/PrivateAnalyzer/private_arrays_search.cpp b/src/PrivateAnalyzer/private_arrays_search.cpp
new file mode 100644
index 0000000..985baf6
--- /dev/null
+++ b/src/PrivateAnalyzer/private_arrays_search.cpp
@@ -0,0 +1,141 @@
+#include <map>
+#include <unordered_set>
+#include <unordered_map>
+#include <vector>
+#include <queue>
+#include <numeric>
+#include <iostream>
+
+#include "private_arrays_search.h"
+#include "range_structures.h"
+#include "region.h"
+#include "../Utils/SgUtils.h"
+#include "../GraphLoop/graph_loops.h"
+#include "../CFGraph/CFGraph.h"
+
+using namespace std;
+
+void Collapse(Region* region)
+{
+    if (region->getBasickBlocks().empty())
+        return;
+
+    for (auto& [arrayName, arrayRanges] : region->getHeader()->array_out)
+    {
+        for (Region* byBlock : region->getBasickBlocks())
+        {
+            AccessingSet intersection = byBlock->array_def[arrayName].Intersect(arrayRanges);
+            region->array_def[arrayName] = region->array_def[arrayName].Union(intersection);
+        }
+    }
+
+    for (auto& byBlock : region->getBasickBlocks()) 
+    {
+        for (auto& [arrayName, arrayRanges] : byBlock->array_use)
+        {
+            AccessingSet diff = byBlock->array_use[arrayName].Diff(byBlock->array_in[arrayName]);
+            region->array_use[arrayName] = region->array_use[arrayName].Union(diff);
+        }
+    }
+    ArrayAccessingIndexes useUnion;
+    for (auto& byBlock : region->getBasickBlocks())
+        for (auto& [arrayName, arrayRanges] : byBlock->array_use)
+            useUnion[arrayName] = useUnion[arrayName].Union(byBlock->array_use[arrayName]);
+
+    for (auto& [arrayName, arrayRanges] : useUnion)
+        region->array_priv[arrayName] = useUnion[arrayName].Diff(region->array_use[arrayName]);
+    
+    for (Region* prevBlock : region->getHeader()->getPrevRegions()) 
+        prevBlock->replaceInNextRegions(region, region->getHeader());
+    
+    for (Region* nextBlock : region->getHeader()->getNextRegions())
+        nextBlock->replaceInPrevRegions(region, region->getHeader());
+}
+
+static void SolveDataFlowIteratively(Region* DFG) 
+{
+    unordered_set<Region*> worklist(DFG->getBasickBlocks());
+    do
+    {
+        Region* b = *worklist.begin();
+        ArrayAccessingIndexes newIn;
+        bool flagFirst = true;
+        for (Region* prevBlock : b->getPrevRegions())
+        {
+            if (flagFirst)
+            {
+                newIn = prevBlock->array_out;
+                flagFirst = false;
+            }
+            else
+            {
+                if (prevBlock->array_out.empty())
+                {
+                    newIn.clear();
+                    continue;
+                }
+                for (const auto& [arrayName, accessSet] : prevBlock->array_out)
+                {
+                    if (newIn.find(arrayName) != newIn.end())
+                        newIn[arrayName] = newIn[arrayName].Intersect(accessSet);                    
+                    else
+                        newIn[arrayName] = AccessingSet();
+                }
+            }
+        }
+
+        b->array_in = move(newIn);
+        ArrayAccessingIndexes newOut;
+        if (b->array_def.empty())        
+            newOut = b->array_in;
+        else if (b->array_in.empty())
+            newOut = b->array_def;
+        else
+        {
+            for (auto& [arrayName, accessSet] : b->array_def)
+            {
+                if (newOut.find(arrayName) != newOut.end())
+                    newOut[arrayName] = b->array_def[arrayName].Union(b->array_in[arrayName]);
+                else
+                    newOut[arrayName] = accessSet;
+            }
+        }
+
+        /* can not differ */
+        if (newOut != b->array_out) 
+            b->array_out = newOut;
+        else
+            worklist.erase(b);
+    } 
+    while (!worklist.empty());
+}
+
+static void SolveDataFlow(Region* DFG)
+{
+    if (!DFG)
+        return;
+
+    SolveDataFlowIteratively(DFG);
+    for (Region* subRegion : DFG->getSubRegions())
+        SolveDataFlow(subRegion);
+    Collapse(DFG);
+}
+
+map<LoopGraph*, ArrayAccessingIndexes>  FindPrivateArrays(map<string, vector<LoopGraph*>> &loopGraph, map<FuncInfo*, vector<SAPFOR::BasicBlock*>>& FullIR)
+{  
+    map<LoopGraph*, ArrayAccessingIndexes> result;
+    for (const auto& [loopName, loops] : loopGraph)
+    {
+        for (const auto& loop : loops)
+        {
+            for (const auto& [funcInfo, blocks]: FullIR)
+            {   
+                Region* loopRegion = new Region(loop, blocks);
+                SolveDataFlow(loopRegion);
+                result[loop] = loopRegion->array_priv;
+                delete(loopRegion);
+            }
+        }
+    }
+    return result;
+}
diff --git a/src/PrivateAnalyzer/private_arrays_search.h b/src/PrivateAnalyzer/private_arrays_search.h
new file mode 100644
index 0000000..2faaa27
--- /dev/null
+++ b/src/PrivateAnalyzer/private_arrays_search.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <vector>
+#include <map>
+#include <unordered_set>
+
+#include "range_structures.h"
+#include "region.h"
+#include "../GraphLoop/graph_loops.h"
+#include "../CFGraph/CFGraph.h"
+
+void Collapse(Region* region);
+std::map<LoopGraph*, ArrayAccessingIndexes> FindPrivateArrays(std::map<std::string, std::vector<LoopGraph*>>& loopGraph, std::map<FuncInfo*, std::vector<SAPFOR::BasicBlock*>>& FullIR);
+std::pair<SAPFOR::BasicBlock*, std::unordered_set<SAPFOR::BasicBlock*>> GetBasicBlocksForLoop(const LoopGraph* loop, const std::vector<SAPFOR::BasicBlock*> blocks);
diff --git a/src/PrivateAnalyzer/range_structures.cpp b/src/PrivateAnalyzer/range_structures.cpp
new file mode 100644
index 0000000..9a2f437
--- /dev/null
+++ b/src/PrivateAnalyzer/range_structures.cpp
@@ -0,0 +1,292 @@
+#include <vector>
+#include <map>
+#include <unordered_set>
+#include <string>
+#include <numeric>
+
+#include "range_structures.h"
+
+using namespace std;
+
+static vector<uint64_t> FindParticularSolution(const ArrayDimension& dim1, const ArrayDimension& dim2)
+{
+    for (uint64_t i = 0; i < dim1.tripCount; i++)
+    {
+        uint64_t leftPart = dim1.start + i * dim1.step;
+        for (uint64_t j = 0; j < dim2.tripCount; j++)
+        {
+            uint64_t rightPart = dim2.start + j * dim2.step;
+            if (leftPart == rightPart)
+                return { i, j };
+        }
+    }
+    return {};
+}
+
+/* dim1 /\ dim2 */
+static ArrayDimension* DimensionIntersection(const ArrayDimension& dim1, const ArrayDimension& dim2)
+{
+    vector<uint64_t> partSolution = FindParticularSolution(dim1, dim2);
+    if (partSolution.empty())
+        return NULL;
+    
+    int64_t x0 = partSolution[0], y0 = partSolution[1];
+    /* x = x_0 + c * t */
+    /* y = y_0 + d * t */
+    int64_t c = dim2.step / gcd(dim1.step, dim2.step);
+    int64_t d = dim1.step / gcd(dim1.step, dim2.step);
+    int64_t tXMin, tXMax, tYMin, tYMax;
+    tXMin = -x0 / c;
+    tXMax = (dim1.tripCount - 1 - x0) / c;
+    tYMin = -y0 / d;
+    tYMax = (dim2.tripCount - 1 - y0) / d;
+    int64_t tMin = max(tXMin, tYMin);
+    uint64_t tMax = min(tXMax, tYMax);
+    if (tMin > tMax)
+        return NULL;
+    
+    uint64_t start3 = dim1.start + x0 * dim1.step;
+    uint64_t step3 = c * dim1.step;
+    ArrayDimension* result = new(ArrayDimension){ start3, step3, tMax + 1 };
+    return result;
+}
+
+/* dim1 / dim2 */
+static vector<ArrayDimension> DimensionDifference(const ArrayDimension& dim1, const ArrayDimension& dim2)
+{
+    ArrayDimension* intersection = DimensionIntersection(dim1, dim2);
+    if (!intersection)
+        return { dim1 };
+    
+    vector<ArrayDimension> result;
+    /* add the part before intersection */
+    if (dim1.start < intersection->start)    
+        result.push_back({ dim1.start, dim1.step, (intersection->start - dim1.start) / dim1.step });
+    
+    /* add the parts between intersection steps */
+    uint64_t start = (intersection->start - dim1.start) / dim1.step;
+    uint64_t interValue = intersection->start;
+    for (int64_t i = start; dim1.start + i * dim1.step <= intersection->start + intersection->step * (intersection->tripCount - 1); i++)
+    {
+        uint64_t centerValue = dim1.start + i * dim1.step;
+        if (centerValue == interValue)
+        {
+            if (i - start > 1)
+            {
+                result.push_back({ dim1.start + (start + 1) * dim1.step, dim1.step, i - start - 1 });
+                start = i;
+            }
+            interValue += intersection->step;
+        }
+    }
+    /* add the part after intersection */
+    if (intersection->start + intersection->step * (intersection->tripCount - 1) < dim1.start + dim1.step * (dim1.tripCount - 1))
+    {
+        /* first value after intersection */
+        uint64_t right_start = intersection->start + intersection->step * (intersection->tripCount - 1) + dim1.step;
+        uint64_t tripCount = (dim1.start + dim1.step * dim1.tripCount - right_start) / dim1.step;
+        result.push_back({ right_start, dim1.step, tripCount });
+    }
+    delete(intersection);
+    return result;
+}
+
+
+static vector<ArrayDimension> DimensionUnion(const ArrayDimension& dim1, const ArrayDimension& dim2)
+{
+    vector<ArrayDimension> res;
+    ArrayDimension* inter = DimensionIntersection(dim1, dim2);
+    if (!inter)
+        return { dim1, dim2 };
+
+    res.push_back(*inter);
+    delete(inter);
+
+    vector<ArrayDimension> diff1, diff2;
+    diff1 = DimensionDifference(dim1, dim2);
+    diff2 = DimensionDifference(dim2, dim1);
+    res.insert(res.end(), diff1.begin(), diff1.end());
+    res.insert(res.end(), diff2.begin(), diff2.end());
+    return res;
+}
+
+static vector<ArrayDimension> ElementsIntersection(const vector<ArrayDimension>& firstElement, const vector<ArrayDimension>& secondElement)
+{
+    if (firstElement.empty() || secondElement.empty())
+        return {};
+    
+    size_t dimAmount = firstElement.size();
+    /* check if there is no intersecction */
+    for (size_t i = 0; i < dimAmount; i++)
+        if (FindParticularSolution(firstElement[i], secondElement[i]).empty())
+            return {};
+
+    vector<ArrayDimension> result(dimAmount);
+    for (size_t i = 0; i < dimAmount; i++)
+    {
+        ArrayDimension* resPtr = DimensionIntersection(firstElement[i], secondElement[i]);
+        if (resPtr)
+            result[i] = *resPtr;
+        else
+            return {};
+
+    }
+    return result;
+}
+
+static vector<vector<ArrayDimension>> ElementsDifference(const vector<ArrayDimension>& firstElement,
+    const vector<ArrayDimension>& secondElement)
+{
+    if (firstElement.empty() || secondElement.empty())
+        return {};
+    
+    vector<ArrayDimension> intersection = ElementsIntersection(firstElement, secondElement);
+    vector<vector<ArrayDimension>> result;
+    if (intersection.empty())
+        return { firstElement };
+    
+    for (int i = 0; i < firstElement.size(); i++)
+    {
+        auto dimDiff = DimensionDifference(firstElement[i], secondElement[i]);
+        if (!dimDiff.empty())
+        {
+            vector<ArrayDimension> firstCopy = firstElement;
+            for (const auto& range : dimDiff)
+            {
+                firstCopy[i] = range;
+                result.push_back(firstCopy);
+            }
+        }
+    }
+    return result;
+}
+
+static void ElementsUnion(const vector<ArrayDimension>& firstElement, const vector<ArrayDimension>& secondElement,
+    vector<vector<ArrayDimension>>& lc, vector<vector<ArrayDimension>>& rc,
+    vector<ArrayDimension>& intersection)
+{
+    /* lc(rc) is a set of ranges, which only exist in first(second) element*/
+    intersection = ElementsIntersection(firstElement, secondElement);
+    lc = ElementsDifference(firstElement, intersection);
+    rc = ElementsDifference(secondElement, intersection);
+}
+
+void AccessingSet::FindUncovered(const vector<ArrayDimension>& element, vector<vector<ArrayDimension>>& result) const {
+    vector<vector<ArrayDimension>> newTails;
+    result.push_back(element);
+    for (const auto& currentElement : allElements)
+    {
+        for (const auto& tailLoc : result)
+        {
+            auto intersection = ElementsIntersection(tailLoc, currentElement);
+            auto diff = ElementsDifference(tailLoc, intersection);
+            if (!diff.empty()) {
+                newTails.insert(newTails.end(), diff.begin(), diff.end());
+            }
+        }
+        result = move(newTails);
+    }
+}
+
+bool AccessingSet::ContainsElement(const vector<ArrayDimension>& element) const
+{
+    vector<vector<ArrayDimension>> tails;
+    FindUncovered(element, tails);
+    return !tails.empty();
+}
+
+void AccessingSet::FindCoveredBy(const vector<ArrayDimension>& element, vector<vector<ArrayDimension>>& result) const
+{
+    for (const auto& currentElement : allElements)
+    {
+        auto intersection = ElementsIntersection(element, currentElement);
+        if (!intersection.empty())
+            result.push_back(intersection);
+    }
+}
+
+vector<vector<ArrayDimension>> AccessingSet::GetElements() const { return allElements; }
+
+void AccessingSet::Insert(const vector<ArrayDimension>& element)
+{
+    vector<vector<ArrayDimension>> tails;
+    FindUncovered(element, tails);
+    allElements.insert(allElements.end(), tails.begin(), tails.end());
+}
+
+AccessingSet AccessingSet::Union(const AccessingSet& source) {
+    AccessingSet result;
+    for (auto& element : source.GetElements())
+        result.Insert(element);
+
+    for (auto& element : allElements)
+        result.Insert(element);
+    return result;
+}
+
+AccessingSet AccessingSet::Intersect(const AccessingSet& secondSet) const
+{
+    vector<vector<ArrayDimension>> result;
+    if (secondSet.GetElements().empty() || this->allElements.empty())
+        return AccessingSet(result);
+
+    for (const auto& element : allElements)
+    {
+        if (secondSet.ContainsElement(element))
+            result.push_back(element);
+        else
+        {
+            vector<vector<ArrayDimension>> coveredBy;
+            secondSet.FindCoveredBy(element, coveredBy);
+            if (!coveredBy.empty())
+                result.insert(result.end(), coveredBy.begin(), coveredBy.end());
+        }
+    }
+
+    return AccessingSet(result);
+}
+
+AccessingSet AccessingSet::Diff(const AccessingSet& secondSet) const
+{
+    if (secondSet.GetElements().empty() || allElements.empty())
+        return *this;
+
+    AccessingSet intersection = this->Intersect(secondSet);
+    AccessingSet uncovered = *this;
+    vector<vector<ArrayDimension>> result;
+    for (const auto& element : intersection.GetElements())
+    {
+        vector<vector<ArrayDimension>> current_uncovered;
+        uncovered.FindUncovered(element, current_uncovered);
+        uncovered = AccessingSet(current_uncovered);
+    }
+    return uncovered;
+}
+
+bool operator!=(const ArrayDimension& lhs, const ArrayDimension& rhs)
+{
+    return !(lhs.start == rhs.start && lhs.step == rhs.step && lhs.tripCount == rhs.tripCount);
+}
+
+
+bool operator!=(const AccessingSet& lhs, const AccessingSet& rhs)
+{
+    for (size_t i = 0; i < lhs.allElements.size(); i++)
+        for (size_t j = 0; j < lhs.allElements[i].size(); j++)
+            if (lhs.allElements[i][j] != rhs.allElements[i][j])
+                return true;
+
+    return false;
+}
+
+bool operator!=(const ArrayAccessingIndexes& lhs, const ArrayAccessingIndexes& rhs)
+{
+    if (lhs.size() != rhs.size())
+        return true;
+
+    for (auto& [key, value] : lhs)
+        if (rhs.find(key) == rhs.end())
+            return true;
+
+    return false;
+}
diff --git a/src/PrivateAnalyzer/range_structures.h b/src/PrivateAnalyzer/range_structures.h
new file mode 100644
index 0000000..4b52f97
--- /dev/null
+++ b/src/PrivateAnalyzer/range_structures.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <vector>
+#include <map>
+#include <unordered_set>
+#include <string>
+#include <cstdint>
+
+struct ArrayDimension
+{
+    uint64_t start, step, tripCount;
+};
+
+class AccessingSet {
+private:
+    std::vector<std::vector<ArrayDimension>> allElements;
+
+public:
+    AccessingSet(std::vector<std::vector<ArrayDimension>> input) : allElements(input) {};
+    AccessingSet() {};
+    AccessingSet(const AccessingSet& a) { allElements = a.GetElements(); };
+    std::vector<std::vector<ArrayDimension>> GetElements() const;
+    void Insert(const std::vector<ArrayDimension>& element);
+    AccessingSet Union(const AccessingSet& source);
+    AccessingSet Intersect(const AccessingSet& secondSet) const;
+    AccessingSet Diff(const AccessingSet& secondSet) const;
+    bool ContainsElement(const std::vector<ArrayDimension>& element) const;
+    void FindCoveredBy(const std::vector<ArrayDimension>& element, std::vector<std::vector<ArrayDimension>>& result) const;
+    void FindUncovered(const std::vector<ArrayDimension>& element, std::vector<std::vector<ArrayDimension>>& result) const;
+    friend bool operator!=(const AccessingSet& lhs, const AccessingSet& rhs);
+};
+
+using ArrayAccessingIndexes = std::map<std::string, AccessingSet>;
+
+bool operator!=(const ArrayDimension& lhs, const ArrayDimension& rhs);
+bool operator!=(const AccessingSet& lhs, const AccessingSet& rhs);
+bool operator!=(const ArrayAccessingIndexes& lhs, const ArrayAccessingIndexes& rhs);
\ No newline at end of file
diff --git a/src/PrivateAnalyzer/region.cpp b/src/PrivateAnalyzer/region.cpp
new file mode 100644
index 0000000..dfe30b1
--- /dev/null
+++ b/src/PrivateAnalyzer/region.cpp
@@ -0,0 +1,246 @@
+#include<vector>
+#include<map>
+#include<unordered_set>
+#include<unordered_map>
+#include<string>
+#include <numeric>
+
+#include "range_structures.h"
+#include "region.h"
+
+#include "../Utils/SgUtils.h"
+
+using namespace std;
+
+static bool isParentStmt(SgStatement* stmt, SgStatement* parent)
+{
+    for (; stmt; stmt = stmt->controlParent())
+        if (stmt == parent)
+            return true;
+
+    return false;
+}
+
+/*returns head block and loop*/
+pair<SAPFOR::BasicBlock*, unordered_set<SAPFOR::BasicBlock*>> GetBasicBlocksForLoop(const LoopGraph* loop, const vector<SAPFOR::BasicBlock*> blocks)
+{
+    unordered_set<SAPFOR::BasicBlock*> block_loop;
+    SAPFOR::BasicBlock* head_block = nullptr;
+    auto loop_operator = loop->loop->GetOriginal();
+    for (const auto& block : blocks)
+    {
+        if (!block || (block->getInstructions().size() == 0))
+            continue;
+
+        SgStatement* first = block->getInstructions().front()->getInstruction()->getOperator();
+        SgStatement* last = block->getInstructions().back()->getInstruction()->getOperator();
+        if (isParentStmt(first, loop_operator) && isParentStmt(last, loop_operator))
+        {
+            block_loop.insert(block);
+
+            if ((!head_block) && (first == loop_operator) && (last == loop_operator) &&
+                (block->getInstructions().size() == 2) &&
+                (block->getInstructions().back()->getInstruction()->getOperation() == SAPFOR::CFG_OP::JUMP_IF))
+            {
+                head_block = block;
+            }
+
+        }
+    }
+    return { head_block, block_loop };
+}
+
+static void BuildLoopIndex(map<string, LoopGraph*>& loopForIndex, LoopGraph* loop) {
+    string index = loop->loopSymbol;
+    loopForIndex[index] = loop;
+
+    for (const auto& childLoop : loop->children)
+        BuildLoopIndex(loopForIndex, childLoop);
+}
+
+static string FindIndexName(int pos, SAPFOR::BasicBlock* block, map<string, LoopGraph*>& loopForIndex) {
+    unordered_set<SAPFOR::Argument*> args = { block->getInstructions()[pos]->getInstruction()->getArg1() };
+
+    for (int i = pos - 1; i >= 0; i--) 
+    {
+        SAPFOR::Argument* res = block->getInstructions()[i]->getInstruction()->getResult();
+        if (res && args.find(res) != args.end()) 
+        {
+            SAPFOR::Argument* arg1 = block->getInstructions()[i]->getInstruction()->getArg1();
+            SAPFOR::Argument* arg2 = block->getInstructions()[i]->getInstruction()->getArg2();
+            if (arg1) 
+            {
+                string name = arg1->getValue();
+                int idx = name.find('%');
+                if (idx != -1 && loopForIndex.find(name.substr(idx + 1)) != loopForIndex.end())
+                    return name.substr(idx + 1);
+                else
+                    args.insert(arg1);
+            }
+
+            if (arg2)
+            {
+                string name = arg2->getValue();
+                int idx = name.find('%');
+                if (idx != -1 && loopForIndex.find(name.substr(idx + 1)) != loopForIndex.end())
+                    return name.substr(idx + 1);
+                else
+                    args.insert(arg2);
+            }
+        }
+    }
+    return "";
+}
+
+static int GetDefUseArray(SAPFOR::BasicBlock* block, LoopGraph* loop, ArrayAccessingIndexes& def, ArrayAccessingIndexes& use) {
+    auto instructions = block->getInstructions();
+    map<string, LoopGraph*> loopForIndex;
+    BuildLoopIndex(loopForIndex, loop);
+    for (int i = 0; i < instructions.size(); i++)
+    {
+        auto instruction = instructions[i];
+        if (!instruction->getInstruction()->getArg1())
+            continue;
+
+        auto operation = instruction->getInstruction()->getOperation();
+        auto type = instruction->getInstruction()->getArg1()->getType();
+        if ((operation == SAPFOR::CFG_OP::STORE || operation == SAPFOR::CFG_OP::LOAD) && type == SAPFOR::CFG_ARG_TYPE::ARRAY)
+        {
+            vector<SAPFOR::Argument*> index_vars;
+            vector<int> refPos;
+            string array_name;
+            if (operation == SAPFOR::CFG_OP::STORE)
+                array_name = instruction->getInstruction()->getArg1()->getValue();            
+            else
+                array_name = instruction->getInstruction()->getArg2()->getValue();
+
+            int j = i - 1;
+            while (j >= 0 && instructions[j]->getInstruction()->getOperation() == SAPFOR::CFG_OP::REF)
+            {
+                index_vars.push_back(instructions[j]->getInstruction()->getArg1());
+                refPos.push_back(j);
+                j--;
+            }
+
+            /*to choose correct dimension*/
+            int n = index_vars.size();
+            vector<ArrayDimension> accessPoint(n);
+
+            auto* ref = isSgArrayRefExp(instruction->getInstruction()->getExpression());
+            vector<pair<int, int>> coefsForDims;
+            for (int i = 0; ref && i < ref->numberOfSubscripts(); ++i)
+            {
+                const vector<int*>& coefs = getAttributes<SgExpression*, int*>(ref->subscript(i), set<int>{ INT_VAL });
+                if (coefs.size() == 1)
+                {
+                    const pair<int, int> coef(coefs[0][0], coefs[0][1]);
+                    coefsForDims.push_back(coef);
+                }
+
+            }
+
+            while (!index_vars.empty())
+            {
+                auto var = index_vars.back();
+                int currentVarPos = refPos.back();
+                pair currentCoefs = coefsForDims.back();
+                ArrayDimension current_dim;
+                if (var->getType() == SAPFOR::CFG_ARG_TYPE::CONST)
+                    current_dim = { stoul(var->getValue()), 1, 1 };
+                else
+                {
+                    string name, full_name = var->getValue();
+                    int pos = full_name.find('%');
+                    LoopGraph* currentLoop;
+                    if (pos != -1) 
+                    {
+                        name = full_name.substr(pos + 1);
+                        if (loopForIndex.find(name) != loopForIndex.end())
+                            currentLoop = loopForIndex[name];                        
+                        else
+                            return -1;
+                    }
+                    else 
+                    {
+                        name = FindIndexName(currentVarPos, block, loopForIndex);
+                        if (name == "")
+                            return -1;
+
+                        if (loopForIndex.find(name) != loopForIndex.end())
+                            currentLoop = loopForIndex[name];                        
+                        else
+                            return -1;
+                    }
+
+                    uint64_t start = currentLoop->startVal * currentCoefs.first + currentCoefs.second;
+                    uint64_t step = currentCoefs.first;
+                    current_dim = { start, step, (uint64_t)currentLoop->calculatedCountOfIters };
+                }
+
+                accessPoint[n - index_vars.size()] = current_dim;
+                index_vars.pop_back();
+                refPos.pop_back();
+                coefsForDims.pop_back();
+            }
+
+            if (operation == SAPFOR::CFG_OP::STORE)            
+                def[array_name].Insert(accessPoint);
+            else
+                use[array_name].Insert(accessPoint);
+        }
+    }
+    return 0;
+
+}
+
+static void SetConnections(unordered_map<SAPFOR::BasicBlock*, Region*>& bbToRegion, const unordered_set<SAPFOR::BasicBlock*>& blockSet)
+{
+    for (SAPFOR::BasicBlock* block : blockSet)
+    {
+        for (SAPFOR::BasicBlock* nextBlock : block->getNext())
+            if (bbToRegion.find(nextBlock) != bbToRegion.end())
+                bbToRegion[block]->addNextRegion(bbToRegion[nextBlock]);
+         
+        for (SAPFOR::BasicBlock* prevBlock : block->getPrev())
+            if (bbToRegion.find(prevBlock) != bbToRegion.end())
+                bbToRegion[block]->addPrevRegion(bbToRegion[prevBlock]);
+    }
+}
+
+static Region* CreateSubRegion(LoopGraph* loop, const vector<SAPFOR::BasicBlock*>& Blocks, const unordered_map<SAPFOR::BasicBlock*, Region*>& bbToRegion)
+{
+    Region* region = new Region;
+    auto [header, blockSet] = GetBasicBlocksForLoop(loop, Blocks);
+    if (bbToRegion.find(header) != bbToRegion.end())
+        region->setHeader(bbToRegion.at(header));    
+    else
+        return NULL;
+    
+    for (SAPFOR::BasicBlock* block : blockSet)
+        if (bbToRegion.find(block) != bbToRegion.end())
+            region->addBasickBlocks(bbToRegion.at(block));
+
+    for (LoopGraph* childLoop : loop->children)
+        region->addSubRegions(CreateSubRegion(childLoop, Blocks, bbToRegion));
+
+    cout << header << endl;
+    return region;
+}
+
+Region::Region(LoopGraph* loop, const vector<SAPFOR::BasicBlock*>& Blocks)
+{
+    auto [header, blockSet] = GetBasicBlocksForLoop(loop, Blocks);
+    unordered_map<SAPFOR::BasicBlock*, Region*> bbToRegion;
+    for (auto poiner : blockSet)
+    {
+        bbToRegion[poiner] = new Region(*poiner);
+        this->basickBlocks.insert(bbToRegion[poiner]);
+        GetDefUseArray(poiner, loop, bbToRegion[poiner]->array_def, bbToRegion[poiner]->array_use);
+
+    }
+    this->header = bbToRegion[header];
+    SetConnections(bbToRegion, blockSet);
+    //create subRegions
+    for (LoopGraph* childLoop : loop->children)
+        subRegions.insert(CreateSubRegion(childLoop, Blocks, bbToRegion));
+}
diff --git a/src/PrivateAnalyzer/region.h b/src/PrivateAnalyzer/region.h
new file mode 100644
index 0000000..5e85900
--- /dev/null
+++ b/src/PrivateAnalyzer/region.h
@@ -0,0 +1,60 @@
+#pragma once
+
+#include<vector>
+#include<map>
+#include<unordered_set>
+#include<string>
+
+#include "../GraphLoop/graph_loops.h"
+#include "../CFGraph/CFGraph.h"
+
+class Region : public SAPFOR::BasicBlock {
+public:
+    Region() { header = nullptr; }
+
+    Region(SAPFOR::BasicBlock block) : SAPFOR::BasicBlock::BasicBlock(block) { header = nullptr; }
+
+    Region(LoopGraph* loop, const std::vector<SAPFOR::BasicBlock*>& Blocks);
+
+    Region* getHeader() { return header; }
+
+    void setHeader(Region* region) { header = region; }
+
+    std::unordered_set<Region*>& getBasickBlocks() { return basickBlocks; }
+
+    void addBasickBlocks(Region* region) { basickBlocks.insert(region); }
+
+    const std::unordered_set<Region*>& getPrevRegions() { return prevRegions; }
+
+    std::unordered_set<Region*> getNextRegions() { return nextRegions; }
+
+    void addPrevRegion(Region* region) { prevRegions.insert(region); }
+
+    void addNextRegion(Region* region) { nextRegions.insert(region); }
+
+    void replaceInPrevRegions(Region* source, Region* destination)
+    {
+        prevRegions.erase(destination);
+        prevRegions.insert(source);
+    }
+
+    void replaceInNextRegions(Region* source, Region* destination)
+    {
+        nextRegions.erase(destination);
+        nextRegions.insert(source);
+    }
+
+    std::unordered_set<Region*> getSubRegions() { return subRegions; }
+
+    void addSubRegions(Region* region) { subRegions.insert(region); }
+
+    ArrayAccessingIndexes array_def, array_use, array_out, array_in, array_priv;
+
+private:
+    std::unordered_set<Region*> subRegions, basickBlocks;
+    /*next Region which is BB for current BB Region*/
+    std::unordered_set<Region*> nextRegions;
+    /*prev Regions which is BBs for current BB Region*/
+    std::unordered_set<Region*> prevRegions;
+    Region* header;
+};
diff --git a/src/Sapfor.cpp b/src/Sapfor.cpp
index f39cb03..86d66ee 100644
--- a/src/Sapfor.cpp
+++ b/src/Sapfor.cpp
@@ -55,6 +55,7 @@
 #include "VerificationCode/verifications.h"
 #include "Distribution/CreateDistributionDirs.h"
 #include "PrivateAnalyzer/private_analyzer.h"
+#include "PrivateAnalyzer/private_arrays_search.h"
 #include "ExpressionTransform/expr_transform.h"
 
 #include "Predictor/PredictScheme.h"
@@ -1031,15 +1032,13 @@ static bool runAnalysis(SgProject &project, const int curr_regime, const bool ne
         }
         else if (curr_regime == BUILD_IR_SSA_FORM)
         {
-            if (ssaFormIR.size() == 0) {
+            if (ssaFormIR.size() == 0)
                 buildIRSSAForm(fullIR, &ssaFormIR);
-            }
         }
-        else if (curr_regime == EXPLORE_IR_LOOPS)
-        {
-            exploreLoops(&ssaFormIR, file_name);
-        }
-            
+        else if (curr_regime == EXPLORE_IR_LOOPS)        
+            exploreLoops(&ssaFormIR, file_name);            
+        else if (curr_regime == FIND_PRIVATE_ARRAYS)
+            FindPrivateArrays(loopGraph, fullIR);
         else if (curr_regime == TEST_PASS)
         {
         //test pass
diff --git a/src/Sapfor.h b/src/Sapfor.h
index bc77cd9..188921a 100644
--- a/src/Sapfor.h
+++ b/src/Sapfor.h
@@ -185,6 +185,8 @@ enum passes {
     EXPLORE_IR_LOOPS,
     BUILD_IR_SSA_FORM,
 
+    FIND_PRIVATE_ARRAYS,
+
     TEST_PASS,
     EMPTY_PASS
 };
@@ -371,6 +373,7 @@ static void setPassValues()
     passNames[INSERT_NO_DISTR_FLAGS_FROM_GUI] = "INSERT_NO_DISTR_FLAGS_FROM_GUI";
     passNames[EXPLORE_IR_LOOPS] = "EXPLORE_IR_LOOPS";
     passNames[BUILD_IR_SSA_FORM] = "BUILD_IR_SSA_FORM";
+    passNames[FIND_PRIVATE_ARRAYS] = "FIND_PRIVATE_ARRAYS";
 
     passNames[TEST_PASS] = "TEST_PASS";
 }
diff --git a/src/Utils/PassManager.h b/src/Utils/PassManager.h
index 542570b..b0fe453 100644
--- a/src/Utils/PassManager.h
+++ b/src/Utils/PassManager.h
@@ -316,8 +316,9 @@ void InitPassesDependencies(map<passes, vector<passes>> &passDepsIn, set<passes>
 
     list({ VERIFY_INCLUDES, CORRECT_VAR_DECL }) <= Pass(SET_IMPLICIT_NONE);
 
-    list({ CALL_GRAPH, LOOP_GRAPH, CALL_GRAPH2 }) <= Pass(BUILD_IR_SSA_FORM);
-    Pass(BUILD_IR_SSA_FORM) <= Pass(EXPLORE_IR_LOOPS);
+    list({ CALL_GRAPH, LOOP_GRAPH, CALL_GRAPH2 }) <= Pass(BUILD_IR_SSA_FORM) <= Pass(EXPLORE_IR_LOOPS);
+
+    list({ CALL_GRAPH2, CALL_GRAPH, BUILD_IR, LOOP_GRAPH, LOOP_ANALYZER_DATA_DIST_S2 }) <= Pass(FIND_PRIVATE_ARRAYS);
 
     passesIgnoreStateDone.insert({ CREATE_PARALLEL_DIRS, INSERT_PARALLEL_DIRS, INSERT_SHADOW_DIRS, EXTRACT_PARALLEL_DIRS, 
                                    EXTRACT_SHADOW_DIRS, CREATE_REMOTES, UNPARSE_FILE, REMOVE_AND_CALC_SHADOW,
diff --git a/src/Utils/utils.cpp b/src/Utils/utils.cpp
index ea9f073..2ee26d1 100644
--- a/src/Utils/utils.cpp
+++ b/src/Utils/utils.cpp
@@ -1415,6 +1415,35 @@ ParallelRegion* getRegionByLine(const vector<ParallelRegion*>& regions, const st
     return NULL;
 }
 
+std::pair<ParallelRegion*, const ParallelRegionLines*> getRegionAndLinesByLine(const vector<ParallelRegion*>& regions, const string& file, const int line)
+{
+    if (regions.size() == 1 && regions[0]->GetName() == "DEFAULT") // only default
+        return { regions[0], NULL };
+    else if (regions.size() > 0)
+    {
+        map<ParallelRegion*, const ParallelRegionLines*> regFound;
+        const ParallelRegionLines* foundLines = NULL;
+
+        for (int i = 0; i < regions.size(); ++i)
+            if (regions[i]->HasThisLine(line, file, &foundLines))
+                regFound[regions[i]] = foundLines;
+
+        if (regFound.size() == 0)
+            return { NULL, NULL };
+        else if (regFound.size() == 1)
+            return *regFound.begin();
+        else
+        {
+            __spf_print(1, "WARN: this lines included in more than one region!!\n");
+            return { NULL, NULL };
+        }
+    }
+    else
+        return { NULL, NULL };
+
+    return { NULL, NULL };
+}
+
 set<ParallelRegion*> getAllRegionsByLine(const vector<ParallelRegion*>& regions, const string& file, const int line)
 {
     set<ParallelRegion*> regFound;