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
Maximize
 Obj: +1 x3
Subject to
\   [nonlinear] <c1>: log((<x_0>+1))+log((<x_1>+1))+<x3>*(-1) >= 0;
 14_0: +1 x_0 <= -0.5
 14_1: +1 x_1 <= -0.5
Bounds
 x_0 free
 x_1 free
 x3 free
End