Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:02:28 2012 Optimize a model with 317 rows, 184 columns and 974 nonzeros Presolve time: 0.00s Presolved: 317 rows, 184 columns, 974 nonzeros Variable types: 0 continuous, 184 integer (184 binary) Found heuristic solution: objective 85.0000000 Root relaxation: objective 0.000000e+00, 48 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 26 85.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.50000 0 27 72.00000 0.50000 99.3% - 0s 0 0 1.03463 0 29 72.00000 1.03463 98.6% - 0s 0 0 1.22511 0 30 72.00000 1.22511 98.3% - 0s 0 0 1.39521 0 30 72.00000 1.39521 98.1% - 0s 0 0 1.41021 0 31 72.00000 1.41021 98.0% - 0s 0 0 1.42308 0 29 72.00000 1.42308 98.0% - 0s 0 0 1.42308 0 30 72.00000 1.42308 98.0% - 0s 0 0 1.42908 0 30 72.00000 1.42908 98.0% - 0s 0 2 1.43327 0 30 72.00000 1.43327 98.0% - 0s * 29 20 14 71.0000000 6.48252 90.9% 41.3 0s * 185 121 15 69.0000000 16.08333 76.7% 35.6 0s * 242 135 14 67.0000000 19.80000 70.4% 32.5 0s * 259 138 14 65.0000000 20.00000 69.2% 31.9 0s * 445 209 16 63.0000000 25.85714 59.0% 29.9 0s * 1220 208 28 62.0000000 34.50000 44.4% 27.0 1s * 3611 222 28 61.0000000 48.60000 20.3% 22.5 2s Cutting planes: Gomory: 2 Zero half: 4 Explored 4677 nodes (99514 simplex iterations) in 3.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.100000000000e+01, best bound 6.100000000000e+01, gap 0.0%