Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:25:23 2012 Optimize a model with 559 rows, 516 columns and 1911 nonzeros Presolve removed 0 rows and 21 columns Presolve time: 0.00s Presolved: 559 rows, 495 columns, 1890 nonzeros Variable types: 0 continuous, 495 integer (494 binary) Found heuristic solution: objective 113.0000000 Root relaxation: objective 0.000000e+00, 289 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 0 213 113.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s 0 0 0.35632 0 215 66.00000 0.35632 99.5% - 0s H 0 0 63.0000000 0.35632 99.4% - 0s H 0 0 45.0000000 0.35632 99.2% - 0s 0 0 0.80681 0 219 45.00000 0.80681 98.2% - 0s H 0 0 44.0000000 0.80681 98.2% - 0s 0 0 0.80681 0 219 44.00000 0.80681 98.2% - 0s 0 2 0.80720 0 219 44.00000 0.80720 98.2% - 0s H 27 27 34.0000000 1.00000 97.1% 68.7 0s * 49 23 34 17.0000000 1.00000 94.1% 52.3 0s * 176 77 18 16.0000000 1.00000 93.8% 50.7 0s * 326 81 13 15.0000000 1.32382 91.2% 50.9 0s Cutting planes: Gomory: 4 Mod-K: 3 Explored 705 nodes (35309 simplex iterations) in 1.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%