Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:26:40 2013 Optimize a model with 2400 rows, 103200 columns and 208100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.51s Presolved: 2200 rows, 102900 columns, 205800 nonzeros Variable types: 102000 continuous, 900 integer (900 binary) Root relaxation: objective 8.654105e+05, 9145 iterations, 0.75 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 2 - 865410.545 - - 1s H 0 0 928918.38371 865410.545 6.84% - 1s 0 0 865463.744 0 2 928918.384 865463.744 6.83% - 1s 0 0 865497.571 0 2 928918.384 865497.571 6.83% - 2s 0 0 865509.211 0 2 928918.384 865509.211 6.83% - 2s 0 0 865521.357 0 2 928918.384 865521.357 6.82% - 2s 0 0 865523.699 0 2 928918.384 865523.699 6.82% - 3s 0 0 865532.698 0 2 928918.384 865532.698 6.82% - 3s 0 0 865533.128 0 1 928918.384 865533.128 6.82% - 3s 0 0 865533.128 0 1 928918.384 865533.128 6.82% - 3s 0 0 865533.465 0 1 928918.384 865533.465 6.82% - 4s 0 0 865534.625 0 1 928918.384 865534.625 6.82% - 4s 0 0 865535.635 0 1 928918.384 865535.635 6.82% - 5s 0 0 865536.011 0 1 928918.384 865536.011 6.82% - 5s 0 0 865536.193 0 1 928918.384 865536.193 6.82% - 6s 0 0 865536.193 0 1 928918.384 865536.193 6.82% - 6s 0 2 865556.405 0 1 928918.384 865556.405 6.82% - 7s 7 9 866689.929 5 2 928918.384 866563.837 6.71% 288 10s 47 49 867498.762 45 1 928918.384 866563.837 6.71% 69.8 15s H 54 26 870913.29812 866563.837 0.50% 65.2 16s 89 30 868179.472 87 2 870913.298 866563.837 0.50% 57.0 20s H 108 23 868407.07802 866563.837 0.21% 47.6 20s 228 24 866850.837 4 1 868407.078 866617.280 0.21% 25.5 25s * 232 5 7 867215.13488 866617.280 0.07% 27.8 25s * 325 8 93 866849.82663 866626.623 0.03% 20.6 27s Cutting planes: Flow cover: 19 Explored 328 nodes (17669 simplex iterations) in 27.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668498266279e+05, best bound 8.667706496003e+05, gap 0.0091%