# Model tp075
param a := 0.48;
param c3 := 3;
param l_1 := 0;
param l_2 := 0;
param l_3 := -a;
param l_4 := -a;
param u_1 := 1200;
param u_2 := 1200;
param u_3 := a;
param u_4 := a;
var x_1 >= l_1, <= u_1;
let x_1 := 0;
var x_2 >= l_2, <= u_2;
let x_2 := 0;
var x_3 >= l_3, <= u_3;
let x_3 := 0;
var x_4 >= l_4, <= u_4;
let x_4 := 0;
minimize obj: 3*x_1 + 1.0e-6*x_1^3 + 2*x_2 + 2.0e-6*x_2^3/c3;
subject to ci_1: x_4 - x_3 + a >= 0;
subject to ci_2: x_3 - x_4 + a >= 0;
subject to ce_1: 1000*sin((-1)*x_3 - 0.25) + 1000*sin((-1)*x_4 - 0.25) + 894.8 - x_1 = 0;
subject to ce_2: 1000*sin(x_3 - 0.25) + 1000*sin(x_3 - x_4 - 0.25) + 894.8 - x_2 = 0;
subject to ce_3: 1000*sin(x_4 - 0.25) + 1000*sin(x_4 - x_3 - 0.25) + 1294.8 = 0;
display obj;
solve;
display obj;
display x_1;
display x_2;
display x_3;
display x_4;
display obj - 5174.412695377741;
display x_1 - 776.1590265860596;
display x_2 - 925.1951384690918;
display x_3 - 0.05110892853835123;
display x_4 + 0.4288910714616488;