CVXPY
Maximize
  Sum(X @ [[2.00 1.00]
 [-2.00 -4.00]], None, False)
Subject To
 14: norm1(X) <= 6.0
Bounds
 X free
End
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AFTER COMPILATION
Minimize
 Obj: -2 x_0 +2 x_1 -1 x_2 +4 x_3
Subject to
 c1: +1 x_0 -1 x_4 <= +0
 c2: +1 x_1 -1 x_5 <= +0
 c3: +1 x_2 -1 x_6 <= +0
 c4: +1 x_3 -1 x_7 <= +0
 c5: -1 x_0 -1 x_4 <= +0
 c6: -1 x_1 -1 x_5 <= +0
 c7: -1 x_2 -1 x_6 <= +0
 c8: -1 x_3 -1 x_7 <= +0
 c9: +1 x_4 +1 x_5 +1 x_6 +1 x_7 <= +6
Bounds
 x_0 free
 x_1 free
 x_2 free
 x_3 free
 x_4 free
 x_5 free
 x_6 free
 x_7 free
End
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SCIP
Maximize
 Obj: +2 X_0_0 +1 X_0_1 -2 X_1_0 -4 X_1_1
Subject to
\   [nonlinear] <14>: abs((<X_0_0>))+abs((<X_0_1>))+abs((<X_1_0>))+abs((<X_1_1>)) <= 6;
Bounds
 X_0_0 free
 X_0_1 free
 X_1_0 free
 X_1_1 free
End