Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:38:27 2013 Optimize a model with 54093 rows, 53363 columns and 213233 nonzeros Presolve removed 3564 rows and 0 columns Presolve time: 0.32s Presolved: 50529 rows, 53363 columns, 206105 nonzeros Variable types: 53290 continuous, 73 integer (73 binary) Root relaxation: objective 9.664306e+04, 15331 iterations, 3.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 96643.0608 0 4 - 96643.0608 - - 3s H 0 0 99678.000000 96643.0608 3.04% - 3s 0 0 96644.2429 0 7 99678.0000 96644.2429 3.04% - 4s 0 0 96644.3542 0 7 99678.0000 96644.3542 3.04% - 4s H 0 0 98388.981439 96644.3542 1.77% - 6s 0 2 96646.4272 0 7 98388.9814 96646.4272 1.77% - 7s H 4 4 98294.004518 96744.4916 1.58% 123 7s H 7 7 97435.328142 96746.1701 0.71% 200 8s H 8 7 96994.000000 96746.1701 0.26% 252 8s * 10 6 8 96951.000000 96746.1701 0.21% 218 8s Cutting planes: Gomory: 2 Flow cover: 6 Explored 25 nodes (19116 simplex iterations) in 9.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.695100000000e+04, best bound 9.695100000000e+04, gap 0.0%