CVXPY
Maximize
  Sum(X, None, False)
Subject To
 11: max(X, None, False) <= 1.0
Bounds
 X free
End
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AFTER COMPILATION
Minimize
 Obj: -1 x_0 -1 x_1 -1 x_2 -1 x_3
Subject to
 c1: +1 x_0 -1 x_4 <= +0
 c2: +1 x_1 -1 x_4 <= +0
 c3: +1 x_2 -1 x_4 <= +0
 c4: +1 x_3 -1 x_4 <= +0
 c5: +1 x_4 <= +1
Bounds
 x_0 free
 x_1 free
 x_2 free
 x_3 free
 x_4 free
End
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SCIP
Maximize
 Obj: +1 X_0_0 +1 X_0_1 +1 X_1_0 +1 X_1_1
Subject to
 max_1_0_0: +1 X_0_0 -1 max_1 <= +0
 max_1_0_1: +1 X_0_1 -1 max_1 <= +0
 max_1_1_0: +1 X_1_0 -1 max_1 <= +0
 max_1_1_1: +1 X_1_1 -1 max_1 <= +0
 11: +1 max_1 <= +1
Bounds
 X_0_0 free
 X_0_1 free
 X_1_0 free
 X_1_1 free
 max_1 free
End