[Scip] Is their any tips for solve large MIP instance with scip?

[杨旭]

here is the message displayed after presloving:

presolving:
(round 1) 35355 del vars, 89355 del conss, 1000 chg bounds, 221716 chg
sides, 221716 chg coeffs, 0 upgd conss, 446796 impls, 52497 clqs
(round 2) 37697 del vars, 90697 del conss, 1000 chg bounds, 221716 chg
sides, 221716 chg coeffs, 0 upgd conss, 446796 impls, 52497 clqs
(round 3) 37697 del vars, 90697 del conss, 53497 chg bounds, 221716 chg
sides, 221716 chg coeffs, 0 upgd conss, 446796 impls, 52497 clqs
(round 4) 37697 del vars, 90697 del conss, 53497 chg bounds, 221716 chg
sides, 221716 chg coeffs, 295253 upgd conss, 446796 impls, 52497 clqs
   (22.4s) probing: 101/296701 (0.0%) - 0 fixings, 0 aggregations, 0
implications, 0 bound changes
   (22.4s) probing aborted: 100/100 successive totally useless probings
presolving (5 rounds):
 37697 deleted vars, 90697 deleted constraints, 53497 tightened bounds, 0
added holes, 221716 changed sides, 221716 changed coefficients
 499293 implications, 52497 cliques
presolved problem has 349198 variables (296701 bin, 0 int, 52497 impl, 0
cont) and 463148 constraints
  52497 constraints of type <varbound>
     55 constraints of type <knapsack>
 242701 constraints of type <setppc>
 167895 constraints of type <linear>
transformed objective value is always integral (scale: 1)
Presolving Time: 20.98

---------------------------------------
YangXu
Tsinghua University, Beijing
TEL: +86-15110264737
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