Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:12:27 2012 Optimize a model with 570 rows, 540 columns and 1791 nonzeros Presolve removed 54 rows and 44 columns Presolve time: 0.01s Presolved: 516 rows, 496 columns, 1634 nonzeros Variable types: 333 continuous, 163 integer (163 binary) Root relaxation: objective 5.608483e+04, 279 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56084.8319 0 81 - 56084.8319 - - 0s H 0 0 83537.000000 56084.8319 32.9% - 0s 0 0 63176.7063 0 38 83537.0000 63176.7063 24.4% - 0s 0 0 63477.8425 0 24 83537.0000 63477.8425 24.0% - 0s 0 0 63572.4898 0 32 83537.0000 63572.4898 23.9% - 0s 0 0 63614.5716 0 28 83537.0000 63614.5716 23.8% - 0s 0 0 63639.6613 0 29 83537.0000 63639.6613 23.8% - 0s 0 2 63643.8098 0 29 83537.0000 63643.8098 23.8% - 0s H 54 47 65648.000000 63646.0352 3.05% 4.1 0s * 241 150 63 65529.000000 63709.9464 2.78% 4.0 0s * 358 128 60 65007.000000 63735.2167 1.96% 4.2 0s H 600 203 64829.000000 63775.7668 1.62% 5.2 0s H 642 213 64655.000000 63899.0820 1.17% 6.2 0s H 702 218 64654.000000 63899.0820 1.17% 6.1 0s H 704 207 64616.000000 63899.0820 1.11% 6.1 0s * 706 193 58 64576.000000 63899.0820 1.05% 6.1 0s * 951 171 43 64555.000000 64194.7341 0.56% 5.9 0s Cutting planes: Gomory: 29 Cover: 9 Implied bound: 1 Flow cover: 96 Flow path: 48 Zero half: 1 Explored 1691 nodes (9993 simplex iterations) in 0.87 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.455500000000e+04, best bound 6.454862749404e+04, gap 0.0099%