Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:37 2013 Optimize a model with 108 rows, 81 columns and 288 nonzeros Presolve removed 36 rows and 36 columns Presolve time: 0.00s Presolved: 72 rows, 45 columns, 216 nonzeros Variable types: 9 continuous, 36 integer (36 binary) Found heuristic solution: objective 2695.0000000 Root relaxation: objective 5.300000e+02, 34 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 530.00000 0 31 2695.00000 530.00000 80.3% - 0s H 0 0 2670.0000000 530.00000 80.1% - 0s 0 0 761.05679 0 25 2670.00000 761.05679 71.5% - 0s 0 0 769.07755 0 30 2670.00000 769.07755 71.2% - 0s 0 0 769.61055 0 30 2670.00000 769.61055 71.2% - 0s 0 0 769.61055 0 30 2670.00000 769.61055 71.2% - 0s H 0 0 1871.0000000 769.61055 58.9% - 0s 0 2 775.53047 0 30 1871.00000 775.53047 58.5% - 0s * 80 57 23 1821.0000000 850.58751 53.3% 4.2 0s H 234 156 1754.0000000 914.49206 47.9% 4.8 0s * 277 178 13 1742.0000000 934.73199 46.3% 4.7 0s * 281 177 14 1740.0000000 934.73199 46.3% 4.7 0s * 285 172 15 1717.0000000 934.73199 45.6% 4.6 0s H 606 293 1698.0000000 1019.76608 39.9% 4.2 0s H 668 304 1687.0000000 1019.76608 39.6% 5.4 0s * 7008 876 28 1685.0000000 1232.89030 26.8% 2.8 0s Cutting planes: Gomory: 10 Implied bound: 1 MIR: 16 Explored 13656 nodes (31680 simplex iterations) in 0.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.685000000000e+03, best bound 1.685000000000e+03, gap 0.0%