Model unknown

  Variables:
    Variable x :   Size=4 Domain=Reals
      1 : 0
      2 : -1
      3 : -0.666667
      4 : 1

  Objectives:
    Objective obj :   Size=1
      Value=-0.666667

  Constraints:
    Constraint c :   Size=1
      Value=-1.00000000014e-6
    Constraint d :   Size=1
      Value=0
