Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:28:38 2013 Optimize a model with 869 rows, 62489 columns and 124899 nonzeros Presolve time: 0.09s Presolved: 869 rows, 62489 columns, 124899 nonzeros Variable types: 62410 continuous, 79 integer (79 binary) Root relaxation: objective 8.843473e+04, 2440 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 88434.7335 0 10 - 88434.7335 - - 0s H 0 0 104581.00000 88434.7335 15.4% - 0s 0 0 88681.8772 0 6 104581.000 88681.8772 15.2% - 0s H 0 0 98686.203192 88681.8772 10.1% - 0s H 0 0 97997.000000 88681.8772 9.51% - 0s 0 0 88709.3446 0 5 97997.0000 88709.3446 9.48% - 0s H 0 0 95499.277459 88709.3446 7.11% - 0s H 0 0 94838.000000 88709.3446 6.46% - 0s 0 0 88716.5927 0 4 94838.0000 88716.5927 6.45% - 0s H 0 0 91761.541960 88716.5927 3.32% - 0s H 0 0 91113.000000 88716.5927 2.63% - 0s H 0 0 90594.000000 88716.5927 2.07% - 0s 0 0 88718.6482 0 4 90594.0000 88718.6482 2.07% - 0s 0 2 88721.6938 0 4 90594.0000 88721.6938 2.07% - 1s H 7 7 90152.000000 88773.9197 1.53% 24.9 1s H 9 8 89848.000000 88773.9197 1.20% 26.0 1s H 13 8 88920.000000 88773.9197 0.16% 31.2 1s * 16 5 14 88889.000000 88773.9197 0.13% 32.1 1s Cutting planes: Implied bound: 76 Flow cover: 3 Explored 20 nodes (3336 simplex iterations) in 1.80 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.888900000000e+04, best bound 8.888128338095e+04, gap 0.0087%