Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:56:56 2012 Optimize a model with 710 rows, 168 columns and 1420 nonzeros Presolve removed 159 rows and 0 columns Presolve time: 0.01s Presolved: 551 rows, 168 columns, 1206 nonzeros Variable types: 0 continuous, 168 integer (168 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 6.750000e+01, 277 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.50000 0 133 50.00000 67.50000 35.0% - 0s H 0 0 52.0000000 67.50000 29.8% - 0s 0 0 66.35932 0 163 52.00000 66.35932 27.6% - 0s 0 0 66.01599 0 163 52.00000 66.01599 27.0% - 0s 0 0 65.20786 0 164 52.00000 65.20786 25.4% - 0s H 0 0 53.0000000 65.20786 23.0% - 0s 0 0 64.47433 0 164 53.00000 64.47433 21.6% - 0s 0 0 64.23562 0 163 53.00000 64.23562 21.2% - 0s 0 0 64.03436 0 165 53.00000 64.03436 20.8% - 0s 0 0 63.87811 0 167 53.00000 63.87811 20.5% - 0s 0 0 63.81539 0 167 53.00000 63.81539 20.4% - 0s 0 0 63.74176 0 166 53.00000 63.74176 20.3% - 0s H 0 0 54.0000000 63.74176 18.0% - 0s 0 0 63.56306 0 166 54.00000 63.56306 17.7% - 0s 0 0 63.54029 0 167 54.00000 63.54029 17.7% - 0s 0 0 63.54029 0 163 54.00000 63.54029 17.7% - 0s 0 2 63.53926 0 163 54.00000 63.53926 17.7% - 0s H 21 13 56.0000000 63.48705 13.4% 45.5 0s H 99 41 57.0000000 62.65687 9.92% 58.8 0s 610 161 60.00000 11 161 57.00000 60.73333 6.55% 41.1 5s 637 181 60.73333 20 137 57.00000 60.73333 6.55% 46.4 10s Cutting planes: Gomory: 2 Clique: 1 Zero half: 173 Explored 2169 nodes (81974 simplex iterations) in 12.89 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%