Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:51:14 2013 Optimize a model with 640 rows, 24700 columns and 248380 nonzeros Presolve removed 20 rows and 500 columns Presolve time: 0.49s Presolved: 620 rows, 24200 columns, 228380 nonzeros Variable types: 24020 continuous, 180 integer (180 binary) Root relaxation: objective 3.573401e+04, 496 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 21 - 35734.0139 - - 0s 0 0 35734.5010 0 21 - 35734.5010 - - 1s 0 0 35734.5793 0 21 - 35734.5793 - - 1s 0 0 35734.6623 0 21 - 35734.6623 - - 1s 0 0 35734.8359 0 21 - 35734.8359 - - 1s 0 0 35734.8406 0 21 - 35734.8406 - - 1s 0 0 35734.8604 0 21 - 35734.8604 - - 1s 0 0 35734.9145 0 21 - 35734.9145 - - 1s 0 0 35734.9252 0 21 - 35734.9252 - - 1s 0 0 35734.9252 0 21 - 35734.9252 - - 2s 0 0 35734.9252 0 21 - 35734.9252 - - 2s 0 0 35734.9330 0 21 - 35734.9330 - - 2s 0 0 35734.9330 0 21 - 35734.9330 - - 2s H 0 0 37180.806647 35734.9330 3.89% - 4s 0 2 35734.9330 0 21 37180.8066 35734.9330 3.89% - 5s H 27 19 36219.190953 36001.8645 0.60% 19.2 5s * 47 35 42 36215.578463 36001.8645 0.59% 12.0 5s * 71 21 25 36182.130057 36171.1956 0.03% 10.4 5s * 85 24 20 36181.874512 36173.2526 0.02% 9.3 5s * 89 22 21 36181.846124 36173.2526 0.02% 8.9 5s * 99 12 18 36177.145809 36173.3886 0.01% 8.2 5s * 106 5 15 36173.473945 36173.4059 0.00% 7.7 5s Cutting planes: Flow cover: 15 Explored 107 nodes (2905 simplex iterations) in 5.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617347394464e+04, best bound 3.617340588274e+04, gap 0.0002%