CVXPY
Maximize
  Sum(log1p(x), None, False)
Subject To
 14: x <= -0.5
Bounds
 x free
End
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AFTER COMPILATION
Either candidate conic solvers (['SCIP']) do not support the cones output by the problem (ExpCone, NonNeg), or there are not enough constraints in the problem.
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SCIP
OBJECTIVE
  Sense            : maximize
VARIABLES
  [continuous] <x_0>: obj=0, original bounds=[-inf,+inf]
  [continuous] <x_1>: obj=0, original bounds=[-inf,+inf]
  [continuous] <x3>: obj=1, original bounds=[-inf,+inf]
CONSTRAINTS
  [nonlinear] <c1>: log((<x_0>+1))+log((<x_1>+1))+<x3>*(-1) >= 0;
  [linear] <14_0>: <x_0>[C] <= -0.5;
  [linear] <14_1>: <x_1>[C] <= -0.5;
END