Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:10:55 2012 Optimize a model with 570 rows, 540 columns and 1791 nonzeros Presolve removed 18 rows and 11 columns Presolve time: 0.01s Presolved: 552 rows, 529 columns, 1747 nonzeros Variable types: 353 continuous, 176 integer (176 binary) Root relaxation: objective 5.115777e+04, 270 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51157.7740 0 88 - 51157.7740 - - 0s H 0 0 84031.000000 51157.7740 39.1% - 0s 0 0 61463.7477 0 35 84031.0000 61463.7477 26.9% - 0s H 0 0 65422.000000 61463.7477 6.05% - 0s 0 0 61926.7827 0 18 65422.0000 61926.7827 5.34% - 0s 0 0 62005.0597 0 14 65422.0000 62005.0597 5.22% - 0s 0 0 62005.6384 0 13 65422.0000 62005.6384 5.22% - 0s 0 2 62008.4762 0 13 65422.0000 62008.4762 5.22% - 0s H 27 26 62654.000000 62009.6838 1.03% 3.2 0s * 112 74 39 62594.000000 62065.9411 0.84% 3.0 0s * 225 118 37 62526.000000 62112.3098 0.66% 3.0 0s H 433 147 62425.000000 62181.7690 0.39% 3.1 0s H 600 168 62421.000000 62215.8308 0.33% 3.2 0s * 803 113 28 62411.000000 62372.4801 0.06% 3.6 0s Cutting planes: Gomory: 11 Cover: 1 Flow cover: 49 Flow path: 31 Explored 813 nodes (3313 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.241100000000e+04, best bound 6.240658108683e+04, gap 0.0071%