Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:50:50 2012 Optimize a model with 409 rows, 266 columns and 1286 nonzeros Presolve time: 0.00s Presolved: 409 rows, 266 columns, 1286 nonzeros Variable types: 0 continuous, 266 integer (266 binary) Found heuristic solution: objective 94.0000000 Root relaxation: objective 0.000000e+00, 99 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 62 94.00000 0.00000 100% - 0s H 0 0 92.0000000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 1.00000 0 64 85.00000 1.00000 98.8% - 0s H 0 0 82.0000000 1.00000 98.8% - 0s 0 0 1.02083 0 64 82.00000 1.02083 98.8% - 0s 0 0 1.04167 0 64 82.00000 1.04167 98.7% - 0s 0 0 1.06250 0 64 82.00000 1.06250 98.7% - 0s 0 0 1.06250 0 64 82.00000 1.06250 98.7% - 0s 0 0 1.06250 0 64 82.00000 1.06250 98.7% - 0s 0 2 1.07326 0 64 82.00000 1.07326 98.7% - 0s * 40 40 22 60.0000000 4.74083 92.1% 32.1 0s * 85 74 27 59.0000000 4.75000 91.9% 28.7 0s * 121 97 20 57.0000000 8.34848 85.4% 29.2 0s * 770 436 27 56.0000000 16.54054 70.5% 27.2 1s * 997 473 32 55.0000000 17.78947 67.7% 26.8 1s 4442 1260 50.30000 27 103 55.00000 31.60000 42.5% 23.0 5s * 7974 1874 28 52.0000000 35.50000 31.7% 21.9 8s * 9076 1909 30 51.0000000 36.58824 28.3% 21.7 9s 10292 1934 40.88000 20 122 51.00000 37.14894 27.2% 21.5 10s 17202 1704 cutoff 24 51.00000 40.57143 20.4% 20.6 15s 24660 712 46.89583 22 127 51.00000 45.12500 11.5% 19.9 20s Cutting planes: Gomory: 1 Zero half: 5 Explored 26065 nodes (512592 simplex iterations) in 20.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%