Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:11:09 2012 Optimize a model with 555 rows, 512 columns and 1897 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 555 rows, 495 columns, 1880 nonzeros Variable types: 0 continuous, 495 integer (494 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 348 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 0 205 104.00000 0.00000 100% - 0s H 0 0 97.0000000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s 0 0 0.40818 0 206 71.00000 0.40818 99.4% - 0s H 0 0 54.0000000 0.40818 99.2% - 0s H 0 0 47.0000000 0.40818 99.1% - 0s 0 0 1.00000 0 205 47.00000 1.00000 97.9% - 0s H 0 0 43.0000000 1.00000 97.7% - 0s 0 0 1.00279 0 207 43.00000 1.00279 97.7% - 0s H 0 0 41.0000000 1.00279 97.6% - 0s 0 0 1.02382 0 209 41.00000 1.02382 97.5% - 0s H 0 0 37.0000000 1.02382 97.2% - 0s 0 0 1.02629 0 214 37.00000 1.02629 97.2% - 0s 0 0 1.02629 0 214 37.00000 1.02629 97.2% - 0s H 0 0 36.0000000 1.02629 97.1% - 0s 0 2 1.02632 0 213 36.00000 1.02632 97.1% - 0s * 43 43 26 20.0000000 1.03180 94.8% 67.9 0s * 54 39 34 18.0000000 1.03180 94.3% 59.0 0s 1869 12 cutoff 18 18.00000 16.49799 8.34% 30.6 5s Cutting planes: Gomory: 12 Zero half: 1 Explored 1884 nodes (58930 simplex iterations) in 5.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%