CVXPY
Maximize
  x
Subject To
 16: exp(x) <= 1.0
Bounds
 x free
End
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AFTER COMPILATION
The solver GUROBI cannot solve this problem.
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GUROBI
Maximize
  x
Subject To
 16: exp_1 <= 1
Bounds
 x free
 exp_1 free
General Constraints
\ exp_1 = exp(x)
 GC0: exp_1 = NL : ( EXP , -1 , -1 ) ( VARIABLE , x , 0 )
End