Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:56:57 2012 Optimize a model with 271 rows, 159 columns and 834 nonzeros Presolve time: 0.00s Presolved: 271 rows, 159 columns, 834 nonzeros Variable types: 0 continuous, 159 integer (159 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 68.0000000 Root relaxation: objective 0.000000e+00, 46 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 24 68.00000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s 0 0 0.75000 0 25 62.00000 0.75000 98.8% - 0s 0 0 1.49242 0 27 62.00000 1.49242 97.6% - 0s 0 0 1.59848 0 27 62.00000 1.59848 97.4% - 0s 0 0 1.67424 0 27 62.00000 1.67424 97.3% - 0s 0 0 1.67957 0 37 62.00000 1.67957 97.3% - 0s 0 0 1.73400 0 29 62.00000 1.73400 97.2% - 0s 0 0 1.79792 0 29 62.00000 1.79792 97.1% - 0s 0 0 1.81250 0 30 62.00000 1.81250 97.1% - 0s 0 0 1.82905 0 39 62.00000 1.82905 97.0% - 0s 0 0 1.84265 0 47 62.00000 1.84265 97.0% - 0s H 0 0 61.0000000 1.84265 97.0% - 0s 0 2 2.10359 0 47 61.00000 2.10359 96.6% - 0s * 199 116 17 59.0000000 20.82237 64.7% 26.2 0s * 414 186 15 58.0000000 26.37500 54.5% 22.9 0s * 500 215 17 57.0000000 30.00000 47.4% 22.4 0s * 501 206 15 56.0000000 30.00000 46.4% 22.4 0s * 753 233 26 54.0000000 31.06667 42.5% 24.0 0s * 865 188 28 52.0000000 31.06667 40.3% 22.9 0s Cutting planes: Gomory: 3 Mod-K: 5 Explored 2316 nodes (48865 simplex iterations) in 1.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%