diff --git a/src/DFA/DFAGraph.cpp b/src/DFA/DFAGraph.cpp
index 3742ec0..ad280b7 100644
--- a/src/DFA/DFAGraph.cpp
+++ b/src/DFA/DFAGraph.cpp
@@ -131,7 +131,7 @@ void DFAGraph::CreateDotFile(const std::string& filename) const {
 
   for (auto& i: vertexes_) {
     for (auto& j: i.second.transitions_) {
-      out << i.first << "." << j.second << "[label=" << j.first << "]\n";
+      out << i.first << "->" << j.second << "[label=" << j.first << "]\n";
     }
     if (i.second.IsStart() && i.second.IsFinal()) {
       out << "  " << i.first << " [shape=star];\n";
diff --git a/src/converters/DFAToMinDFA.cpp b/src/converters/DFAToMinDFA.cpp
index 591e49e..af52be9 100644
--- a/src/converters/DFAToMinDFA.cpp
+++ b/src/converters/DFAToMinDFA.cpp
@@ -66,6 +66,7 @@ DFAGraph DFAGraphToMinDFAGraph(DFAGraph&& graph) {
     }
   }
 
+  /*
   for (int i = 0; i < n; ++i) {
     for (int k = 0; k < n; ++k) {
       for (int j = 0; j < alphabet.size() + 1; ++j) {
@@ -75,6 +76,7 @@ DFAGraph DFAGraphToMinDFAGraph(DFAGraph&& graph) {
     }
     std::cout << std::endl;
   }
+   */
 
   std::vector<std::vector<size_t>>& last_layer(table.back());
   size_t count_vertex = 0;
diff --git a/src/converters/InvertFDFA.cpp b/src/converters/InvertFDFA.cpp
index 61ad9e2..429060b 100644
--- a/src/converters/InvertFDFA.cpp
+++ b/src/converters/InvertFDFA.cpp
@@ -5,7 +5,7 @@ DFAGraph InvertFDFAGraph(DFAGraph&& fdfa_graph) {
   const size_t n = fdfa_graph.GetCountVertexes();
   for (int i = 0; i < n; ++i) {
     if (fdfa_graph.NotExistVertex(i)) continue;
-    fdfa_graph.GetVertex(i).SetFinal(fdfa_graph.GetVertex(i).IsFinal());
+    fdfa_graph.GetVertex(i).SetFinal(!fdfa_graph.GetVertex(i).IsFinal());
   }
   return std::move(fdfa_graph);
 }
diff --git a/src/main.cpp b/src/main.cpp
index 6cd9217..9187628 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -50,7 +50,20 @@ void example2() {
 }
 
 int main() {
+  {
+    RegularTree r("a*");
+    NFAGraph NFA_graph = RegularToNFAGraph(std::move(r));
+    DFAGraph DFA_graph = NFAGraphToDFAGraph(std::move(NFA_graph));
+    DFA_graph = DFAGraphToMinDFAGraph(std::move(DFA_graph));
+    DFA_graph = DFAGraphToFDFAGraph(std::move(DFA_graph), {'a', 'b'});
+    DFA_graph.Print();
+    DFA_graph.CreateDotFile("1.dot");
+    DFA_graph = InvertFDFAGraph(std::move(DFA_graph));
+    DFA_graph.CreateDotFile("2.dot");
+    DFA_graph = DFAGraphToMinDFAGraph(std::move(DFA_graph));
+  }
 
+  return 0;
   {
     RegularTree r("((ab|ba)*( |a|ba))");
     NFAGraph NFA_tree = RegularToNFAGraph(std::move(r));
diff --git a/tests/NFAToDFA/CheckEquivalence.cpp b/tests/NFAToDFA/CheckEquivalence.cpp
index 2594763..2b84cfa 100644
--- a/tests/NFAToDFA/CheckEquivalence.cpp
+++ b/tests/NFAToDFA/CheckEquivalence.cpp
@@ -26,13 +26,13 @@ TEST(check_equivalence_NFA_to_DFA, 1) {
   for (int i = 0; i < N; ++i)
     a[i] = tree.AddNewVertex();
 
-  tree.GetVertex(a[0])->AddEdge('a', a[1]);
-  tree.GetVertex(a[1])->AddEdge('a', a[2]);
-  tree.GetVertex(a[0])->AddEdge('a', a[3]);
+  tree.GetVertex(a[0]).AddEdge('a', a[1]);
+  tree.GetVertex(a[1]).AddEdge('a', a[2]);
+  tree.GetVertex(a[0]).AddEdge('a', a[3]);
 
-  tree.GetVertex(a[0])->SetStart(true);
-  tree.GetVertex(a[2])->SetFinal(true);
-  tree.GetVertex(a[3])->SetFinal(true);
+  tree.GetVertex(a[0]).SetStart(true);
+  tree.GetVertex(a[2]).SetFinal(true);
+  tree.GetVertex(a[3]).SetFinal(true);
 
   DFA::DFAGraph res = converters::NFAGraphToDFAGraph(std::move(tree));
 
@@ -53,14 +53,14 @@ TEST(check_equivalence_NFA_to_DFA, 2) {
   for (int i = 0; i < N; ++i)
     a[i] = tree.AddNewVertex();
 
-  tree.GetVertex(a[0])->AddEdge('a', a[1]);
-  tree.GetVertex(a[0])->AddEdge('a', a[2]);
-  tree.GetVertex(a[1])->AddEdge('b', a[1]);
-  tree.GetVertex(a[2])->AddEdge('c', a[2]);
+  tree.GetVertex(a[0]).AddEdge('a', a[1]);
+  tree.GetVertex(a[0]).AddEdge('a', a[2]);
+  tree.GetVertex(a[1]).AddEdge('b', a[1]);
+  tree.GetVertex(a[2]).AddEdge('c', a[2]);
 
-  tree.GetVertex(a[0])->SetStart(true);
-  tree.GetVertex(a[1])->SetFinal(true);
-  tree.GetVertex(a[2])->SetFinal(true);
+  tree.GetVertex(a[0]).SetStart(true);
+  tree.GetVertex(a[1]).SetFinal(true);
+  tree.GetVertex(a[2]).SetFinal(true);
 
   DFA::DFAGraph res = converters::NFAGraphToDFAGraph(std::move(tree));