Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:56:35 2012 Optimize a model with 441 rows, 316 columns and 1416 nonzeros Presolve time: 0.00s Presolved: 441 rows, 316 columns, 1416 nonzeros Variable types: 0 continuous, 316 integer (316 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 137 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 96 87.00000 0.00000 100% - 0s 0 0 0.51512 0 99 87.00000 0.51512 99.4% - 0s 0 0 0.61772 0 99 87.00000 0.61772 99.3% - 0s H 0 0 84.0000000 0.61772 99.3% - 0s 0 0 0.65440 0 99 84.00000 0.65440 99.2% - 0s H 0 0 83.0000000 0.65440 99.2% - 0s 0 0 0.65808 0 99 83.00000 0.65808 99.2% - 0s H 0 0 78.0000000 0.65808 99.2% - 0s H 0 0 77.0000000 0.65808 99.1% - 0s H 0 0 71.0000000 0.65808 99.1% - 0s 0 2 0.67589 0 99 71.00000 0.67589 99.0% - 0s H 54 54 60.0000000 3.54841 94.1% 23.7 0s * 60 48 41 59.0000000 3.54841 94.0% 21.9 0s H 96 74 53.0000000 3.67485 93.1% 23.5 0s * 100 76 26 52.0000000 3.67485 92.9% 22.9 0s * 102 70 24 51.0000000 3.67485 92.8% 22.5 0s H 489 282 44.0000000 14.00000 68.2% 24.7 0s H 770 358 42.0000000 15.72727 62.6% 26.6 1s * 2972 496 36 41.0000000 26.69231 34.9% 23.6 4s 3857 505 39.52632 26 146 41.00000 28.50000 30.5% 23.5 5s Cutting planes: Gomory: 1 Mod-K: 3 Explored 7766 nodes (172722 simplex iterations) in 8.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%