Model size before/after presolve

[ronaldvdv]

In 912-glass4-0.log we have the following:

Optimize a model with 396 rows, 322 columns and 1815 nonzeros
Model fingerprint: 0x0a9d9037
Variable types: 20 continuous, 302 integer (0 binary)
Coefficient statistics:
...
Presolve removed 6 rows and 6 columns
Presolve time: 0.00s
Presolved: 390 rows, 316 columns, 1803 nonzeros
Variable types: 19 continuous, 297 integer (297 binary)

We extract the following information:

• NumConstrs = 396
• NumVars = 322
• NumNZs = 1815
• PresolvedNumConVars = 19
• PresolvedNumIntVars = 297
• PresolvedNumBinVars = 297

Should we also extract the third line above, e.g. the detailed model size before presolve (20 continuous, 302 integer, 0 binary variables)?

[mattmilten]

Sure! Why not?

[ronaldvdv]

Also noticed that there are output lines of the form Presolved model has 7931 second-order cone constraints which we ignore right now

[Z-Haoruo]

Hi, thank you for developing this tool! I was wondering if the NumBinVars, NumConVars and NumIntVars before presolving could be extracted. I would appreciate it if this feature were implemented. Thank you!