Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:24:39 2013 Optimize a model with 71484 rows, 70644 columns and 282324 nonzeros Presolve removed 4044 rows and 0 columns Presolve time: 0.46s Presolved: 67440 rows, 70644 columns, 274236 nonzeros Variable types: 70560 continuous, 84 integer (84 binary) Root relaxation: objective 1.130099e+05, 16124 iterations, 3.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 113009.938 0 6 - 113009.938 - - 4s H 0 0 123120.00000 113009.938 8.21% - 4s H 0 0 116865.00000 113009.938 3.30% - 5s 0 0 113046.326 0 9 116865.000 113046.326 3.27% - 5s H 0 0 115097.00000 113046.326 1.78% - 6s 0 0 113048.089 0 9 115097.000 113048.089 1.78% - 6s 0 0 113048.089 0 9 115097.000 113048.089 1.78% - 6s 0 2 113056.276 0 9 115097.000 113056.276 1.77% - 11s H 7 7 114668.59525 113267.636 1.22% 305 13s * 13 11 9 113778.00000 113267.636 0.45% 355 14s 17 8 113310.059 2 7 113778.000 113268.422 0.45% 316 15s H 39 17 113596.00000 113296.472 0.26% 219 18s H 40 16 113572.54930 113296.472 0.24% 215 18s 63 16 113566.395 3 3 113572.549 113390.674 0.16% 193 20s H 81 2 113510.00000 113462.143 0.04% 170 21s H 82 2 113508.00000 113462.700 0.04% 169 21s H 83 2 113487.87879 113462.700 0.02% 167 21s * 84 2 15 113478.00000 113462.700 0.01% 166 21s Cutting planes: Gomory: 4 Flow cover: 10 Explored 86 nodes (30309 simplex iterations) in 21.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.134780000000e+05, best bound 1.134760935392e+05, gap 0.0017%