Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:53 2012 Optimize a model with 484 rows, 135 columns and 968 nonzeros Presolve removed 97 rows and 0 columns Presolve time: 0.00s Presolved: 387 rows, 135 columns, 835 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 5.750000e+01, 199 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.50000 0 109 40.00000 57.50000 43.8% - 0s H 0 0 43.0000000 57.50000 33.7% - 0s 0 0 56.16667 0 130 43.00000 56.16667 30.6% - 0s 0 0 55.07407 0 135 43.00000 55.07407 28.1% - 0s 0 0 54.31746 0 133 43.00000 54.31746 26.3% - 0s H 0 0 44.0000000 54.31746 23.4% - 0s 0 0 53.79115 0 133 44.00000 53.79115 22.3% - 0s 0 0 53.68168 0 133 44.00000 53.68168 22.0% - 0s H 0 0 45.0000000 53.68168 19.3% - 0s H 0 0 46.0000000 53.68168 16.7% - 0s 0 0 53.42354 0 132 46.00000 53.42354 16.1% - 0s 0 0 53.21435 0 133 46.00000 53.21435 15.7% - 0s H 0 0 47.0000000 53.21435 13.2% - 0s 0 0 53.14457 0 133 47.00000 53.14457 13.1% - 0s H 0 0 48.0000000 53.14457 10.7% - 0s 0 0 53.11232 0 134 48.00000 53.11232 10.7% - 0s 0 0 53.11232 0 134 48.00000 53.11232 10.7% - 0s 0 2 53.11027 0 134 48.00000 53.11027 10.6% - 0s * 59 20 7 49.0000000 52.22642 6.58% 34.9 0s Cutting planes: Gomory: 1 Zero half: 95 Explored 247 nodes (8295 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%