Hello, I am trying to solve the ode for four dimensional system have tried ODE23 and ODE45. The code is running till t 1.8s only. Couldn't find a reason.

This is the main code:

clc;
close all;clear all;
T=0:.001:2;
x0=[1,1,0,1];    
[t,x]=ode23(@newchao,T,x0);
x1=x(:,1);
x2=x(:,2);
x3=x(:,3);
x4=x(:,4);

figure;
plot3(x1,x2,x3);
xlabel('x1');
ylabel('x2');
zlabel('x3');
grid on;
figure(2);
plot3(x2,x3,x4);
xlabel('x2');
ylabel('x3');
zlabel('x4');
grid on;
figure(3);
plot3(x3,x4,x1);
xlabel('x3');
ylabel('x4');
zlabel('x1');
grid on;
figure(4);
plot3(x1,x2,x4);
xlabel('x1');
ylabel('x2');
zlabel('x4');
grid on;

This is the four dimensional system's function:

function dx=newchao(T,x)
a=-35;
b=10;
c=-1;
d=-10;
b1=1;
b2=-1;
b3=1;
b4=1;
dx=zeros(4,1);
dx(1)=a*x(1)-b1*x(1)*x(2)*x(3);
dx(2)=b*x(2)-b2*x(1)*x(3)*x(4);
dx(3)=c*x(3)-b3*x(1)*x(2)*x(4);
dx(4)=d*x(4)-b4*x(1)*x(2)*x(3);
end