CVXPY
Minimize
  abs(X + Y)
Subject To
Bounds
 X free
 Y free
End
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AFTER COMPILATION
Minimize
 Obj: +1 x_0
Subject to
 c1: -1 x_0 +1 x_1 +1 x_2 <= +0
 c2: -1 x_0 -1 x_1 -1 x_2 <= +0
Bounds
 x_0 free
 x_1 free
 x_2 free
End
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SCIP
Minimize
 Obj: +1 x3
Subject to
\   [nonlinear] <c1>: abs((<X_0>+<Y>))+<x3>*(-1) <= 0;
Bounds
 X_0 free
 Y free
 x3 free
End