Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:06:14 2012 Optimize a model with 427 rows, 416 columns and 1481 nonzeros Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 427 rows, 391 columns, 1456 nonzeros Variable types: 0 continuous, 391 integer (390 binary) Found heuristic solution: objective 79.0000000 Root relaxation: objective 0.000000e+00, 249 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 0 172 79.00000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s 0 0 0.41279 0 173 59.00000 0.41279 99.3% - 0s H 0 0 56.0000000 0.41279 99.3% - 0s 0 0 1.09460 0 180 56.00000 1.09460 98.0% - 0s H 0 0 52.0000000 1.09460 97.9% - 0s H 0 0 51.0000000 1.09460 97.9% - 0s 0 0 1.09531 0 180 51.00000 1.09531 97.9% - 0s 0 0 1.09531 0 179 51.00000 1.09531 97.9% - 0s H 0 0 48.0000000 1.09531 97.7% - 0s H 0 0 46.0000000 1.09531 97.6% - 0s H 0 0 40.0000000 1.09531 97.3% - 0s 0 2 1.09593 0 179 40.00000 1.09593 97.3% - 0s H 27 27 36.0000000 1.25203 96.5% 34.9 0s * 37 33 20 14.0000000 1.25203 91.1% 31.8 0s * 132 53 42 13.0000000 1.40645 89.2% 28.5 0s * 227 63 11 12.0000000 1.41849 88.2% 33.6 0s Cutting planes: Gomory: 3 Mod-K: 2 Explored 515 nodes (18565 simplex iterations) in 0.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%