Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:12:30 2012 Optimize a model with 570 rows, 540 columns and 1789 nonzeros Presolve removed 37 rows and 25 columns Presolve time: 0.01s Presolved: 533 rows, 515 columns, 1693 nonzeros Variable types: 344 continuous, 171 integer (171 binary) Root relaxation: objective 5.613316e+04, 281 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56133.1572 0 93 - 56133.1572 - - 0s H 0 0 86297.000000 56133.1572 35.0% - 0s 0 0 65255.4251 0 52 86297.0000 65255.4251 24.4% - 0s 0 0 65997.1976 0 36 86297.0000 65997.1976 23.5% - 0s 0 0 66110.8031 0 33 86297.0000 66110.8031 23.4% - 0s 0 0 66123.7866 0 31 86297.0000 66123.7866 23.4% - 0s 0 0 66139.1488 0 39 86297.0000 66139.1488 23.4% - 0s 0 2 66144.3116 0 39 86297.0000 66144.3116 23.4% - 0s H 27 27 69160.000000 66165.3638 4.33% 5.3 0s H 54 51 67474.000000 66165.3638 1.94% 4.0 0s * 207 166 68 67403.000000 66166.9159 1.83% 4.0 0s * 728 499 65 67357.000000 66364.9916 1.47% 6.1 0s * 850 506 74 67292.000000 66422.0147 1.29% 6.3 0s * 1002 553 74 67276.000000 66426.6109 1.26% 6.3 0s * 1124 512 54 67027.000000 66434.4503 0.88% 6.4 0s * 1174 497 50 67017.000000 66436.1878 0.87% 6.3 0s H 3910 1233 66912.000000 66612.2811 0.45% 7.0 2s 10472 2640 66909.6725 23 32 66912.0000 66755.5668 0.23% 6.8 5s Cutting planes: Gomory: 24 Cover: 2 Implied bound: 1 Flow cover: 151 Flow path: 66 Explored 19373 nodes (121398 simplex iterations) in 8.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.691199999997e+04, best bound 6.690537051390e+04, gap 0.0099%