Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:27:40 2012 Optimize a model with 273 rows, 211 columns and 891 nonzeros Presolve time: 0.00s Presolved: 273 rows, 211 columns, 891 nonzeros Variable types: 0 continuous, 211 integer (211 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 0.000000e+00, 117 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 72 59.00000 0.00000 100% - 0s H 0 0 53.0000000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s 0 0 0.32558 0 74 51.00000 0.32558 99.4% - 0s H 0 0 50.0000000 0.32558 99.3% - 0s 0 0 0.90680 0 75 50.00000 0.90680 98.2% - 0s H 0 0 43.0000000 0.90680 97.9% - 0s 0 0 0.92060 0 77 43.00000 0.92060 97.9% - 0s 0 0 0.92060 0 78 43.00000 0.92060 97.9% - 0s 0 0 0.92060 0 77 43.00000 0.92060 97.9% - 0s H 0 0 37.0000000 0.92060 97.5% - 0s H 0 0 34.0000000 0.92060 97.3% - 0s 0 2 0.92271 0 77 34.00000 0.92271 97.3% - 0s H 27 27 30.0000000 3.08724 89.7% 32.9 0s * 39 26 27 27.0000000 3.08724 88.6% 25.7 0s * 58 35 12 24.0000000 4.27136 82.2% 29.6 0s * 143 69 17 21.0000000 8.65479 58.8% 27.6 0s * 193 64 11 20.0000000 8.86559 55.7% 25.5 0s * 213 49 10 19.0000000 9.39527 50.6% 25.3 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 430 nodes (10367 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%