Gurobi 5.0.1 (linux64) logging started Tue Nov 20 07:00:00 2012 Optimize a model with 1072 rows, 148 columns and 2144 nonzeros Presolve removed 414 rows and 0 columns Presolve time: 0.01s Presolved: 658 rows, 148 columns, 1712 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.905920e+01, 360 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.05920 0 147 28.00000 49.05920 75.2% - 0s H 0 0 31.0000000 49.05920 58.3% - 0s 0 0 48.52841 0 146 31.00000 48.52841 56.5% - 0s 0 0 48.38299 0 145 31.00000 48.38299 56.1% - 0s 0 0 48.23557 0 148 31.00000 48.23557 55.6% - 0s 0 0 48.10053 0 146 31.00000 48.10053 55.2% - 0s H 0 0 32.0000000 48.10053 50.3% - 0s 0 0 48.01427 0 145 32.00000 48.01427 50.0% - 0s 0 0 47.72646 0 146 32.00000 47.72646 49.1% - 0s 0 0 47.61938 0 146 32.00000 47.61938 48.8% - 0s 0 0 47.57768 0 146 32.00000 47.57768 48.7% - 0s 0 0 47.42151 0 147 32.00000 47.42151 48.2% - 0s 0 0 47.25802 0 147 32.00000 47.25802 47.7% - 0s H 0 0 34.0000000 47.25802 39.0% - 0s 0 0 47.20737 0 146 34.00000 47.20737 38.8% - 0s 0 0 47.11068 0 147 34.00000 47.11068 38.6% - 0s 0 0 47.05214 0 147 34.00000 47.05214 38.4% - 0s H 0 0 35.0000000 47.05214 34.4% - 0s 0 0 46.98268 0 146 35.00000 46.98268 34.2% - 0s 0 0 46.94437 0 146 35.00000 46.94437 34.1% - 0s 0 0 46.92739 0 146 35.00000 46.92739 34.1% - 0s 0 0 46.90331 0 145 35.00000 46.90331 34.0% - 0s 0 0 46.89688 0 145 35.00000 46.89688 34.0% - 0s 0 0 46.89688 0 145 35.00000 46.89688 34.0% - 0s 0 2 46.89604 0 145 35.00000 46.89604 34.0% - 0s * 214 94 18 36.0000000 45.27206 25.8% 50.7 0s 611 279 39.50000 15 146 36.00000 43.97505 22.2% 43.4 5s 1847 729 40.88167 18 104 36.00000 42.85609 19.0% 46.6 10s H 2004 693 37.0000000 42.69536 15.4% 45.4 10s 4396 1283 40.65972 26 114 37.00000 41.00000 10.8% 39.4 15s 7766 1045 38.31250 25 87 37.00000 39.51562 6.80% 35.3 20s Cutting planes: Gomory: 5 Clique: 2 Zero half: 50 Explored 9747 nodes (323113 simplex iterations) in 21.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0%