Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:38 2012 Optimize a model with 416 rows, 129 columns and 832 nonzeros Presolve removed 76 rows and 0 columns Presolve time: 0.00s Presolved: 340 rows, 129 columns, 725 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 5.450000e+01, 195 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.50000 0 89 48.00000 54.50000 13.5% - 0s 0 0 54.00000 0 123 48.00000 54.00000 12.5% - 0s 0 0 53.83333 0 115 48.00000 53.83333 12.2% - 0s 0 0 53.38889 0 125 48.00000 53.38889 11.2% - 0s 0 0 53.13580 0 125 48.00000 53.13580 10.7% - 0s 0 0 52.72857 0 121 48.00000 52.72857 9.85% - 0s H 0 0 49.0000000 52.72857 7.61% - 0s 0 0 52.65147 0 124 49.00000 52.65147 7.45% - 0s 0 0 52.62500 0 124 49.00000 52.62500 7.40% - 0s 0 0 52.55556 0 124 49.00000 52.55556 7.26% - 0s 0 0 52.52321 0 123 49.00000 52.52321 7.19% - 0s 0 0 52.50000 0 123 49.00000 52.50000 7.14% - 0s 0 0 52.49580 0 124 49.00000 52.49580 7.13% - 0s 0 0 52.49580 0 120 49.00000 52.49580 7.13% - 0s H 0 0 50.0000000 52.49580 4.99% - 0s 0 2 52.48872 0 120 50.00000 52.48872 4.98% - 0s Cutting planes: Gomory: 1 Zero half: 72 Explored 36 nodes (2094 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%