#vulnerable code 
                                public boolean processingBifurcation(long height) {
        return this.bifurcateProcessor.processing(height);
    } 
                            #location 2 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public boolean processingBifurcation(long height) {
        lock.lock();
        try {
            return this.bifurcateProcessor.processing(height);
        } finally {
            lock.unlock();
        }
    }