Gurobi 5.0.1 (linux64) logging started Sat Dec 8 03:30:43 2012 Optimize a model with 555 rows, 540 columns and 1783 nonzeros Presolve removed 40 rows and 25 columns Presolve time: 0.00s Presolved: 515 rows, 515 columns, 1698 nonzeros Variable types: 345 continuous, 170 integer (170 binary) Root relaxation: objective 5.404932e+04, 266 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54049.3180 0 81 - 54049.3180 - - 0s H 0 0 85847.000000 54049.3180 37.0% - 0s 0 0 61640.8919 0 21 85847.0000 61640.8919 28.2% - 0s 0 0 61761.8466 0 16 85847.0000 61761.8466 28.1% - 0s 0 0 61840.4807 0 20 85847.0000 61840.4807 28.0% - 0s 0 0 61846.0960 0 18 85847.0000 61846.0960 28.0% - 0s 0 0 61864.8091 0 13 85847.0000 61864.8091 27.9% - 0s 0 0 61878.9998 0 16 85847.0000 61878.9998 27.9% - 0s 0 0 61882.3407 0 13 85847.0000 61882.3407 27.9% - 0s 0 0 61882.7531 0 15 85847.0000 61882.7531 27.9% - 0s 0 2 61907.1393 0 15 85847.0000 61907.1393 27.9% - 0s H 27 24 62616.000000 61926.7051 1.10% 2.9 0s * 119 15 33 62608.000000 62533.5592 0.12% 4.0 1s Cutting planes: Gomory: 16 Cover: 10 Implied bound: 2 Flow cover: 67 Flow path: 43 Explored 154 nodes (994 simplex iterations) in 1.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.260800000000e+04, best bound 6.260655405659e+04, gap 0.0023%