Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:25:24 2013 Optimize a model with 781 rows, 50481 columns and 100891 nonzeros Presolve time: 0.07s Presolved: 781 rows, 50481 columns, 100891 nonzeros Variable types: 50410 continuous, 71 integer (71 binary) Root relaxation: objective 7.893647e+04, 1689 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 78936.4728 0 8 - 78936.4728 - - 0s H 0 0 81670.000000 78936.4728 3.35% - 0s H 0 0 79518.000000 78936.4728 0.73% - 0s 0 0 79203.9582 0 5 79518.0000 79203.9582 0.39% - 0s 0 0 79203.9582 0 8 79518.0000 79203.9582 0.39% - 0s 0 0 79203.9582 0 5 79518.0000 79203.9582 0.39% - 0s 0 0 79231.1233 0 5 79518.0000 79231.1233 0.36% - 0s 0 0 79244.0071 0 4 79518.0000 79244.0071 0.34% - 0s 0 0 79244.0423 0 4 79518.0000 79244.0423 0.34% - 0s 0 0 79250.1279 0 6 79518.0000 79250.1279 0.34% - 0s 0 0 79250.4063 0 4 79518.0000 79250.4063 0.34% - 1s 0 0 79254.1681 0 4 79518.0000 79254.1681 0.33% - 1s 0 0 79255.7586 0 4 79518.0000 79255.7586 0.33% - 1s 0 0 79256.6579 0 4 79518.0000 79256.6579 0.33% - 1s 0 0 79256.7123 0 4 79518.0000 79256.7123 0.33% - 1s 0 0 79256.8313 0 4 79518.0000 79256.8313 0.33% - 1s 0 0 79256.8313 0 4 79518.0000 79256.8313 0.33% - 1s 0 2 79260.3083 0 4 79518.0000 79260.3083 0.32% - 1s * 14 5 12 79479.000000 79290.8462 0.24% 52.6 1s Cutting planes: Implied bound: 161 Flow cover: 16 Explored 34 nodes (5393 simplex iterations) in 2.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.947900000000e+04, best bound 7.947900000000e+04, gap 0.0%