Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:09:23 2012 Optimize a model with 453 rows, 432 columns and 1562 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 453 rows, 413 columns, 1543 nonzeros Variable types: 0 continuous, 413 integer (412 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 0.000000e+00, 274 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 0 174 71.00000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s 0 0 0.38364 0 176 51.00000 0.38364 99.2% - 0s H 0 0 36.0000000 0.38364 98.9% - 0s 0 0 0.66667 0 179 36.00000 0.66667 98.1% - 0s H 0 0 34.0000000 0.66667 98.0% - 0s 0 0 0.66667 0 179 34.00000 0.66667 98.0% - 0s H 0 0 27.0000000 0.66667 97.5% - 0s 0 0 0.66667 0 180 27.00000 0.66667 97.5% - 0s 0 0 0.66667 0 180 27.00000 0.66667 97.5% - 0s H 0 0 24.0000000 0.66667 97.2% - 0s 0 2 0.66667 0 178 24.00000 0.66667 97.2% - 0s H 54 46 16.0000000 1.69048 89.4% 27.0 0s * 134 87 26 15.0000000 4.80357 68.0% 22.3 0s * 235 108 13 14.0000000 4.94845 64.7% 21.9 0s H 264 92 13.0000000 5.61538 56.8% 21.2 0s Cutting planes: Gomory: 1 Mod-K: 1 Explored 755 nodes (17280 simplex iterations) in 0.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%