Gurobi 5.0.1 (linux64) logging started Wed Apr 24 05:08:34 2013 Optimize a model with 76647 rows, 75777 columns and 302847 nonzeros Presolve removed 7050 rows and 0 columns Presolve time: 0.52s Presolved: 69597 rows, 75777 columns, 288747 nonzeros Variable types: 75690 continuous, 87 integer (87 binary) Root relaxation: objective 9.363450e+04, 13989 iterations, 3.40 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 93634.4989 0 7 - 93634.4989 - - 4s H 0 0 99493.000000 93634.4989 5.89% - 4s H 0 0 98512.000000 93634.4989 4.95% - 4s H 0 0 94126.000000 93634.4989 0.52% - 4s 0 0 93638.8388 0 8 94126.0000 93638.8388 0.52% - 5s 0 0 93638.8388 0 7 94126.0000 93638.8388 0.52% - 11s 0 0 93638.8388 0 8 94126.0000 93638.8388 0.52% - 11s 0 0 93638.8388 0 8 94126.0000 93638.8388 0.52% - 11s 0 2 93646.1332 0 8 94126.0000 93646.1332 0.51% - 13s 15 12 93850.2500 14 1 94126.0000 93757.7187 0.39% 79.9 15s * 19 11 18 93919.000000 93757.7187 0.17% 86.4 15s Cutting planes: Gomory: 1 Flow cover: 8 Explored 57 nodes (26101 simplex iterations) in 17.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.391900000000e+04, best bound 9.391900000000e+04, gap 0.0%