Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:41 2012 Optimize a model with 561 rows, 150 columns and 1122 nonzeros Presolve removed 119 rows and 2 columns Presolve time: 0.00s Presolved: 442 rows, 148 columns, 951 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.225000e+01, 286 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.25000 0 145 47.00000 62.25000 32.4% - 0s 0 0 60.92283 0 146 47.00000 60.92283 29.6% - 0s 0 0 60.33333 0 146 47.00000 60.33333 28.4% - 0s H 0 0 50.0000000 60.33333 20.7% - 0s 0 0 60.08333 0 146 50.00000 60.08333 20.2% - 0s 0 0 59.56109 0 144 50.00000 59.56109 19.1% - 0s 0 0 59.47339 0 144 50.00000 59.47339 18.9% - 0s 0 0 59.30209 0 148 50.00000 59.30209 18.6% - 0s H 0 0 51.0000000 59.30209 16.3% - 0s 0 0 59.13452 0 147 51.00000 59.13452 16.0% - 0s 0 0 59.03556 0 148 51.00000 59.03556 15.8% - 0s 0 0 58.92055 0 147 51.00000 58.92055 15.5% - 0s 0 0 58.86715 0 148 51.00000 58.86715 15.4% - 0s 0 0 58.82329 0 148 51.00000 58.82329 15.3% - 0s 0 0 58.82329 0 148 51.00000 58.82329 15.3% - 0s H 0 0 53.0000000 58.82329 11.0% - 0s H 0 0 54.0000000 58.82329 8.93% - 0s 0 2 58.82322 0 148 54.00000 58.82322 8.93% - 0s Cutting planes: Gomory: 2 Zero half: 127 Explored 294 nodes (14561 simplex iterations) in 0.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%