Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:13 2012 Optimize a model with 570 rows, 152 columns and 1140 nonzeros Presolve removed 109 rows and 0 columns Presolve time: 0.00s Presolved: 461 rows, 152 columns, 987 nonzeros Variable types: 0 continuous, 152 integer (152 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 6.283333e+01, 266 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.83333 0 141 50.00000 62.83333 25.7% - 0s 0 0 61.36111 0 151 50.00000 61.36111 22.7% - 0s H 0 0 51.0000000 61.36111 20.3% - 0s 0 0 60.83333 0 150 51.00000 60.83333 19.3% - 0s 0 0 60.36479 0 151 51.00000 60.36479 18.4% - 0s 0 0 59.94897 0 151 51.00000 59.94897 17.5% - 0s 0 0 59.74054 0 150 51.00000 59.74054 17.1% - 0s H 0 0 53.0000000 59.74054 12.7% - 0s 0 0 59.62531 0 149 53.00000 59.62531 12.5% - 0s 0 0 59.57020 0 147 53.00000 59.57020 12.4% - 0s 0 0 59.25709 0 152 53.00000 59.25709 11.8% - 0s 0 0 59.24550 0 151 53.00000 59.24550 11.8% - 0s 0 0 59.12942 0 152 53.00000 59.12942 11.6% - 0s 0 0 59.10776 0 152 53.00000 59.10776 11.5% - 0s 0 0 59.10776 0 150 53.00000 59.10776 11.5% - 0s 0 2 59.10147 0 150 53.00000 59.10147 11.5% - 0s H 8 8 54.0000000 59.08677 9.42% 52.2 0s * 12 4 5 55.0000000 59.08677 7.43% 38.6 0s Cutting planes: Gomory: 2 Zero half: 101 Explored 200 nodes (8193 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%