Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:11:01 2012 Optimize a model with 570 rows, 540 columns and 1790 nonzeros Presolve removed 20 rows and 12 columns Presolve time: 0.01s Presolved: 550 rows, 528 columns, 1742 nonzeros Variable types: 352 continuous, 176 integer (176 binary) Root relaxation: objective 5.205019e+04, 273 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52050.1942 0 93 - 52050.1942 - - 0s H 0 0 82543.000000 52050.1942 36.9% - 0s 0 0 62166.5040 0 41 82543.0000 62166.5040 24.7% - 0s 0 0 62763.7831 0 24 82543.0000 62763.7831 24.0% - 0s 0 0 62824.2635 0 15 82543.0000 62824.2635 23.9% - 0s 0 0 62840.4341 0 12 82543.0000 62840.4341 23.9% - 0s 0 0 62841.9667 0 16 82543.0000 62841.9667 23.9% - 0s H 0 0 64509.000000 62841.9667 2.58% - 0s 0 2 62863.5195 0 16 64509.0000 62863.5195 2.55% - 0s H 27 20 63278.000000 62874.4406 0.64% 3.7 0s H 54 26 63194.000000 62896.3216 0.47% 3.4 1s * 59 21 24 63134.000000 62896.3216 0.38% 3.3 1s * 70 12 6 63056.000000 62914.0019 0.23% 3.1 1s * 82 11 6 63038.000000 62961.2458 0.12% 3.3 1s * 89 5 4 62998.000000 62968.6731 0.05% 3.2 1s Cutting planes: Gomory: 17 Flow cover: 69 Flow path: 46 Explored 101 nodes (749 simplex iterations) in 1.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.299800000000e+04, best bound 6.299800000000e+04, gap 0.0%