CVXPY
Minimize
  0.0
Subject To
 4: x == -1.0
Bounds
 x free
End
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AFTER COMPILATION
OBJECTIVE
  Sense            : minimize
VARIABLES
  [continuous] <x_0>: obj=0, original bounds=[-inf,+inf]
CONSTRAINTS
  [linear] <c1>: <x_0>[C] == -1;
END
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SCIP
OBJECTIVE
  Sense            : minimize
VARIABLES
  [continuous] <x>: obj=0, original bounds=[-inf,+inf]
CONSTRAINTS
  [linear] <4>: <x>[C] == -1;
END