Originally posted by: Uonly

Hi cplex community,

Can I output the linearized mip instance with indicator constraints?

Thanks

In the C API you can grab the presolved model and output that in LP file format. That will give you the model that CPLEX actually solves. Note that this may still contain indicator constraints since CPLEX may choose to handle some indicator constraints directly without explicitly linearizing them.

In the above approach you can also disable presolve (CPX_PARAM_PREIND=0). In that case CPLEX will only do the minimal presolve required, in your case this means linearizing the indicator constraints.

Originally posted by: Uonly

Thanks Daniel!

Is that possible even to disable the minimal presolve?

I did some search but it seems there is no API for that.

What exactly are you trying to do here? You said you want to see the "linearized MIP". If you disable the minimal presolve then you will disable linearization of indicator constraints and you will thus only see the original MIP. If you don't want any presolve then just dump the original model.

Originally posted by: Uonly

Thanks . I think I was just curious about the granularity of the cplex api