CVXPY
Minimize
  x + -y
Subject To
 12: y <= 1.0
Bounds
 0.0 <= x
 0.0 <= y
End
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AFTER COMPILATION
Minimize
 Obj: +1 x_0 -1 x_1
Subject to
 c1: -1 x_0 <= +0
 c2: -1 x_1 <= +0
 c3: +1 x_1 <= +1
Bounds
 x_0 free
 x_1 free
End
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SCIP
Minimize
 Obj: +1 x -1 y
Subject to
 12: +1 y <= +1
Bounds
End