tp044.apm

Model tp044
  ! Source version 1

  Variables
    x[1:4] = 0, >= 0
    obj
  End Variables

  Equations
    8 - x[1] - 2*x[2] >= 0
    12 - 4*x[1] - x[2] >= 0
    12 - 3*x[1] - 4*x[2] >= 0
    8 - 2*x[3] - x[4] >= 0
    8 - x[3] - 2*x[4] >= 0
    5 - x[3] - x[4] >= 0

    obj = x[1] - x[2] - x[3] - x[1]*x[3] &
        + x[1]*x[4] + x[2]*x[3] - x[2]*x[4]

    ! best known objective = -15
    ! begin of best known solution
    ! x[1] = 0
    ! x[2] = 3
    ! x[3] = 0
    ! x[4] = 4
    ! end of best known solution
  End Equations
End Model