Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:48:03 2012 Optimize a model with 724 rows, 164 columns and 1448 nonzeros Presolve removed 146 rows and 0 columns Presolve time: 0.00s Presolved: 578 rows, 164 columns, 1256 nonzeros Variable types: 0 continuous, 164 integer (164 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 6.533333e+01, 355 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.33333 0 151 50.00000 65.33333 30.7% - 0s 0 0 64.54659 0 160 50.00000 64.54659 29.1% - 0s 0 0 63.70640 0 162 50.00000 63.70640 27.4% - 0s 0 0 63.35714 0 159 50.00000 63.35714 26.7% - 0s 0 0 62.87500 0 158 50.00000 62.87500 25.8% - 0s H 0 0 52.0000000 62.87500 20.9% - 0s 0 0 62.63636 0 160 52.00000 62.63636 20.5% - 0s H 0 0 53.0000000 62.63636 18.2% - 0s 0 0 62.38978 0 161 53.00000 62.38978 17.7% - 0s 0 0 61.94691 0 162 53.00000 61.94691 16.9% - 0s 0 0 61.91836 0 163 53.00000 61.91836 16.8% - 0s 0 0 61.90322 0 161 53.00000 61.90322 16.8% - 0s 0 0 61.88426 0 162 53.00000 61.88426 16.8% - 0s 0 0 61.88426 0 161 53.00000 61.88426 16.8% - 0s H 0 0 55.0000000 61.88426 12.5% - 0s 0 2 61.87865 0 160 55.00000 61.87865 12.5% - 0s H 27 11 56.0000000 61.74407 10.3% 52.9 0s * 173 33 5 57.0000000 60.39796 5.96% 48.6 0s Cutting planes: Zero half: 153 Explored 369 nodes (17408 simplex iterations) in 0.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%