Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:00:18 2012 Optimize a model with 443 rows, 417 columns and 1522 nonzeros Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 443 rows, 397 columns, 1502 nonzeros Variable types: 0 continuous, 397 integer (396 binary) Found heuristic solution: objective 78.0000000 Root relaxation: objective 0.000000e+00, 227 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 0 168 78.00000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s 0 0 0.37751 0 170 71.00000 0.37751 99.5% - 0s H 0 0 57.0000000 0.37751 99.3% - 0s 0 0 0.85873 0 172 57.00000 0.85873 98.5% - 0s H 0 0 56.0000000 0.85873 98.5% - 0s 0 0 0.85978 0 174 56.00000 0.85978 98.5% - 0s H 0 0 47.0000000 0.85978 98.2% - 0s H 0 0 44.0000000 0.85978 98.0% - 0s H 0 0 41.0000000 0.85978 97.9% - 0s H 0 0 37.0000000 0.85978 97.7% - 0s 0 2 0.86564 0 172 37.00000 0.86564 97.7% - 0s H 54 41 19.0000000 3.43726 81.9% 21.7 0s * 135 80 31 18.0000000 6.31373 64.9% 18.4 0s H 242 91 17.0000000 7.61538 55.2% 21.8 0s * 279 78 26 16.0000000 7.64151 52.2% 20.8 0s * 327 70 14 15.0000000 8.38028 44.1% 21.4 0s Cutting planes: Gomory: 3 Zero half: 1 Explored 559 nodes (12099 simplex iterations) in 0.52 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%