$*************************************************************
$ Problem of simultaneously determining the optimal structural
$   and operating prameters for a process:  Configuration #2
$
$ M.A. Duran and I.E. Grossmann, "An outer-approximation
$   algorithm for a class of mixed-integer nonlinear programs"
$   Math. Prog. 1986, 36, 307--339
$
$ Example 2
$
$ Optimal Solution:  73.0353
$*************************************************************

DECLARATION {{
  XVAR {x3,x5,x9,x11,x13,x16};
  YVAR {y1,y2,y3,y4,y5};
  XUBD {2,2,2,10,10,3};
  XLBD {0,0,0,0,0,0};
  BINARY {y1,y2,y3,y4,y5};
  YSTP {1,0,0,0,0};
}}

MODEL {{
  MIN: 5*y1 + 8*y2 + 6*y3 + 10*y4 + 6*y5 - 10*x3 - 15*x5 - 15*x9 +
      15*x11 + 5*x13 - 20*x16 + exp[x3] + exp[x5/1.2] -
      60*log[x11+x13+1] + 140;
  n1: - log[x11+x13+1] =l= 0;
  l2: -x3 - x5 - 2*x9 + x11 + 2*x16 =l= 0;
  l3: -x3 - x5 - 0.75*x9 + x11 + 2*x16 =l= 0;
  l4: x9 - x16 =l= 0;
  l5: 2*x9 - x11 - 2*x16 =l= 0;
  l6: -0.5*x11 + x13 =l= 0;
  l7: 0.2*x11 - x13 =l= 0;
  n8: exp[x3] - 10*y1 =l= 1;
  n9: exp[x5/1.2] - 10*y2 =l= 1;
  l10: 1.25*x9 - 10*y3 =l= 0;
  l11: x11 + x13 - 10*y4 =l= 0;
  l12: -2*x9 + 2*x16 - 10*y5 =l= 0;
  ld13: y1 + y2 =e= 1;
  ld14: y4 + y5 =l= 1;
}}