CVXPY
Minimize
  0.0
Subject To
 4: x == -1.0
Bounds
 x free
End
----------------------------------------
AFTER COMPILATION
Minimize
 Obj: 0 x_0
Subject to
 c1: +1 x_0 = -1
Bounds
 x_0 free
End
----------------------------------------
SCIP
Minimize
 Obj: 0 x
Subject to
 4: +1 x = -1
Bounds
 x free
End