Gurobi 5.0.1 (linux64) logging started Wed Dec 19 20:44:23 2012 Optimize a model with 3722 rows, 3721 columns and 16824 nonzeros Presolve removed 2914 rows and 1849 columns Presolve time: 0.06s Presolved: 808 rows, 1872 columns, 10702 nonzeros Variable types: 55 continuous, 1817 integer (1817 binary) Root relaxation: objective 5.443785e+02, 289 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 544.37847 0 103 - 544.37847 - - 0s 0 0 582.19610 0 117 - 582.19610 - - 0s 0 0 584.27714 0 128 - 584.27714 - - 0s 0 0 587.37986 0 118 - 587.37986 - - 0s 0 0 588.86667 0 98 - 588.86667 - - 0s 0 0 589.08333 0 111 - 589.08333 - - 0s 0 0 589.36111 0 123 - 589.36111 - - 0s 0 0 589.50000 0 124 - 589.50000 - - 0s 0 0 589.50000 0 102 - 589.50000 - - 0s 0 0 589.50000 0 111 - 589.50000 - - 0s 0 0 589.50000 0 99 - 589.50000 - - 0s 0 0 589.50000 0 106 - 589.50000 - - 0s 0 0 589.50000 0 106 - 589.50000 - - 0s 0 2 589.52525 0 106 - 589.52525 - - 0s 617 504 658.75734 92 81 - 602.32011 - 9.0 5s * 1501 804 58 657.0000000 603.45546 8.15% 16.8 8s * 1503 767 57 655.0000000 603.45546 7.87% 16.8 8s H 1600 480 622.0000000 603.59432 2.96% 16.9 8s 1611 490 603.59432 29 113 622.00000 603.59432 2.96% 17.6 10s H 1663 461 609.0000000 603.59432 0.89% 18.0 10s Cutting planes: Learned: 1 Gomory: 49 Cover: 11 Implied bound: 38 Clique: 8 MIR: 80 GUB cover: 5 Zero half: 34 Explored 1917 nodes (37191 simplex iterations) in 10.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.090000000000e+02, best bound 6.090000000000e+02, gap 0.0%