java testing Forked java VM exited abnormally

I have a problem with testing my java's bank implementation. I tried a lot of testing classes including these copied from my friends, in which who it was testing properly. In my project it always prints this exact error, which I posted below.

http://ift.tt/1OCfZ0q

And here is a piece of code of my test bank implementation:

package bank;

import org.junit.Before;
import org.junit.Test;

public class testmacka {

    private BankImpl testowa;
    @Before
    public  void create(){
        testowa=new BankImpl();
    }

    @Test(expected = BankImpl.InsufficientFundsException.class)
    public void test6(){
        int idd=testowa.createAccount("Szmariusz", "Grajewo 45");
        testowa.deposit(idd, 1000);
        testowa.withdraw(idd, 1100);
    }

    @Test
    public void test2a(){
     int idx=testowa.createAccount("cris", "Las");
     testowa.deposit(1, 600);
     boolean i=(testowa.getBalance(idx)==600);
     assert i;
    }
    @Test(expected = BankImpl.AccountIdException.class)
    public void test2c(){
        testowa.deposit(-400, 900);
    }
    @Test(expected = BankImpl.AccountIdException.class)
    public void test2d(){
        testowa.getBalance(-9);
    }
    @Test(expected = BankImpl.AccountIdException.class)
    public void test3(){
        testowa.deposit(12, 200);
}
    @Test
    public void test4(){
        int id1=testowa.createAccount("x", "y");
        int id2=testowa.createAccount("x", "y");
        assert id1==id2;

    }
    @Test
    public void test5(){
        int id3=testowa.createAccount("kk", "kk");
        assert null!=testowa.findAccount("kk", "kk");

    }

    @Test(expected = BankImpl.InsufficientFundsException.class)
    public void test7(){
        int idd2=testowa.createAccount("Szmariusz2", "Grajewo 45");
        int idd1=testowa.createAccount("Krzysztof", "Zambrow");

        testowa.deposit(idd2, 1000);
        testowa.deposit(idd1, 900);
        testowa.transfer(idd1, idd2, 1100);


    }

}

I will appreciate any suggestions.