Second order cone constraints included in number of rows shown in log?

Answered

Gereon Recht

November 26, 2025 11:13 Edited

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Hi,

I am trying to find out the size of my problem instance, which is a convex quadratically constrained program. After the presolve, the log shows these two lines:

Presolved: 43995543 rows, 36713377 columns, 141305274 nonzeros
Presolved model has 6228360 second-order cone constraints

Now I am wondering whether the second-order cone constraints are included in the number of rows shown in the first line. Neither this output nor the documentation are clear about this.

Thanks
Gereon

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  Jaromił Najman

  • Gurobi Staff

  November 27, 2025 13:06

  Hi Gereon,

  The reported number of rows corresponds to the number of linear rows only. All other type of constraints are listed separately such as the second-order cone constraints in your example.

  Best regards, 
  Jaromił

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