CVXPY
Maximize
  x + y
Subject To
 16: maximum(x, y, 1.0) <= 3.0
Bounds
 x free
 y free
End
----------------------------------------
AFTER COMPILATION
Minimize
  - x_0 - x_1
Subject To
 R0: x_0 - x_2 <= 0
 R1: x_1 - x_2 <= 0
 R2: - x_2 <= -1
 R3: x_2 <= 3
Bounds
 x_0 free
 x_1 free
 x_2 >= 1
End
----------------------------------------
GUROBI
Maximize
  x[0] + y
Subject To
 16: maximum_1 <= 3
Bounds
 x[0] free
 y free
 maximum_1 free
General Constraints
 GC0: maximum_1 = MAX ( x[0] , y , 1 )
End