CVXPY
Maximize
  Sum(x, None, False)
Subject To
 7: reshape(x, (4,), F) <= [1. 1. 1. 1.]
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
 c2: +1 x_1 <= +1
 c3: +1 x_2 <= +1
 c4: +1 x_3 <= +1
Bounds
 x_0 free
 x_1 free
 x_2 free
 x_3 free
End
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SCIP
Maximize
 Obj: +1 x_0 +1 x_1 +1 x_2 +1 x_3
Subject to
 7_0: +1 x_0 <= +1
 7_1: +1 x_1 <= +1
 7_2: +1 x_2 <= +1
 7_3: +1 x_3 <= +1
Bounds
 x_0 free
 x_1 free
 x_2 free
 x_3 free
End