diff --git a/server/src/Paths.cpp b/server/src/Paths.cpp
index 2c6b12b8..d31ce27a 100644
--- a/server/src/Paths.cpp
+++ b/server/src/Paths.cpp
@@ -51,10 +51,6 @@ namespace Paths {
         return m.first == base.end();
     }
 
-    bool skipFile(const fs::path &file) {
-        return file.string().substr(file.string().size() - 4) == ".f.o";
-    }
-
     fs::path longestCommonPrefixPath(const fs::path &a, const fs::path &b) {
         if (a == b) {
             return a;
diff --git a/server/src/Paths.h b/server/src/Paths.h
index 255c55b4..507d8495 100644
--- a/server/src/Paths.h
+++ b/server/src/Paths.h
@@ -102,8 +102,6 @@ namespace Paths {
 
     bool isSubPathOf(const fs::path &base, const fs::path &sub);
 
-    bool skipFile(const fs::path &file);
-
     fs::path longestCommonPrefixPath(const fs::path &a, const fs::path &b);
 
     static inline fs::path replaceExtension(const fs::path &path, const std::string &newExt) {
diff --git a/server/src/building/BuildDatabase.h b/server/src/building/BuildDatabase.h
index 49902297..095142f6 100644
--- a/server/src/building/BuildDatabase.h
+++ b/server/src/building/BuildDatabase.h
@@ -240,6 +240,7 @@ class BuildDatabase {
     const utbot::ProjectContext projectContext;
     CollectionUtils::MapFileTo<std::vector<std::shared_ptr<ObjectFileInfo>>> sourceFileInfos;
     CollectionUtils::MapFileTo<std::shared_ptr<ObjectFileInfo>> objectFileInfos;
+    CollectionUtils::FileSet ignoredOutput;
     CollectionUtils::MapFileTo<std::shared_ptr<TargetInfo>> targetInfos;
     CollectionUtils::MapFileTo<std::vector<fs::path>> objectFileTargets;
 
diff --git a/server/src/building/ProjectBuildDatabase.h b/server/src/building/ProjectBuildDatabase.h
index ddf8c339..2808a068 100644
--- a/server/src/building/ProjectBuildDatabase.h
+++ b/server/src/building/ProjectBuildDatabase.h
@@ -19,7 +19,7 @@ class ProjectBuildDatabase : public BuildDatabase {
     ProjectBuildDatabase(fs::path buildCommandsJsonPath, fs::path serverBuildDir,
                          utbot::ProjectContext projectContext);
 
-    ProjectBuildDatabase(utbot::ProjectContext projectContext);
+    explicit ProjectBuildDatabase(utbot::ProjectContext projectContext);
 };
 
 
diff --git a/server/src/building/ProjectBuildDatabse.cpp b/server/src/building/ProjectBuildDatabse.cpp
index 17e7a18b..5c4266c7 100644
--- a/server/src/building/ProjectBuildDatabse.cpp
+++ b/server/src/building/ProjectBuildDatabse.cpp
@@ -69,10 +69,6 @@ void ProjectBuildDatabase::initObjects(const nlohmann::json &compileCommandsJson
         fs::path jsonFile = compileCommand.at("file").get<std::string>();
         fs::path sourceFile = Paths::getCCJsonFileFullPath(jsonFile, directory);
 
-        if (!Paths::isSourceFile(sourceFile)){
-            continue;
-        }
-
         std::vector<std::string> jsonArguments;
         if (compileCommand.contains("command")) {
             std::string command = compileCommand.at("command");
@@ -87,6 +83,13 @@ void ProjectBuildDatabase::initObjects(const nlohmann::json &compileCommandsJson
         objectInfo->command = utbot::CompileCommand(jsonArguments, directory, sourceFile);
         objectInfo->command.removeWerror();
         fs::path outputFile = objectInfo->getOutputFile();
+
+        if (!Paths::isSourceFile(sourceFile)) {
+            LOG_S(INFO) << "Skip non C/C++ file: \"" << sourceFile << "\"";
+            ignoredOutput.insert(outputFile);
+            continue;
+        }
+
         fs::path kleeFilePathTemplate = Paths::createNewDirForFile(sourceFile, projectContext.projectPath,
                                                                    Paths::getUTBotFiles(projectContext));
         fs::path kleeFile = Paths::addSuffix(kleeFilePathTemplate, "_klee");
@@ -171,7 +174,7 @@ void ProjectBuildDatabase::initInfo(const nlohmann::json &linkCommandsJson) {
         for (nlohmann::json const &jsonFile: linkCommand.at("files")) {
             auto filename = jsonFile.get<std::string>();
             fs::path currentFile = Paths::getCCJsonFileFullPath(filename, command.getDirectory());
-            if (Paths::skipFile(currentFile)){
+            if (ignoredOutput.count(currentFile)) {
                 continue;
             }
             targetInfo->addFile(currentFile);
@@ -180,8 +183,8 @@ void ProjectBuildDatabase::initInfo(const nlohmann::json &linkCommandsJson) {
                     !CollectionUtils::containsKey(objectFileInfos,
                                                   relative(currentFile, directory))) {
                     throw CompilationDatabaseException(
-                        "compile_commands.json doesn't contain a command for object file " +
-                        currentFile.string());
+                            "compile_commands.json doesn't contain a command for object file " +
+                            currentFile.string());
                 }
                 if (CollectionUtils::containsKey(objectFileInfos, currentFile)) {
                     objectFileInfos[currentFile]->linkUnit = output;