CVXPY
Minimize
  abs(x + y)
Subject To
Bounds
 x free
 y free
End
----------------------------------------
AFTER COMPILATION
OBJECTIVE
  Sense            : minimize
VARIABLES
  [continuous] <x_0>: obj=1, original bounds=[-inf,+inf]
  [continuous] <x_1>: obj=0, original bounds=[-inf,+inf]
  [continuous] <x_2>: obj=0, original bounds=[-inf,+inf]
CONSTRAINTS
  [linear] <c1>:  -<x_0>[C] +<x_1>[C] +<x_2>[C] <= 0;
  [linear] <c2>:  -<x_0>[C] -<x_1>[C] -<x_2>[C] <= 0;
END
----------------------------------------
SCIP
OBJECTIVE
  Sense            : minimize
VARIABLES
  [continuous] <x>: obj=0, original bounds=[-inf,+inf]
  [continuous] <y>: obj=0, original bounds=[-inf,+inf]
  [continuous] <x3>: obj=1, original bounds=[-inf,+inf]
CONSTRAINTS
  [nonlinear] <c1>: abs((<x>+<y>))+<x3>*(-1) <= 0;
END