Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:38 2012 Optimize a model with 454 rows, 129 columns and 908 nonzeros Presolve removed 105 rows and 4 columns Presolve time: 0.00s Presolved: 349 rows, 125 columns, 755 nonzeros Variable types: 0 continuous, 125 integer (125 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.350000e+01, 204 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.50000 0 97 43.00000 53.50000 24.4% - 0s 0 0 52.32353 0 121 43.00000 52.32353 21.7% - 0s H 0 0 45.0000000 52.32353 16.3% - 0s 0 0 51.50000 0 95 45.00000 51.50000 14.4% - 0s 0 0 51.28685 0 120 45.00000 51.28685 14.0% - 0s 0 0 50.70370 0 119 45.00000 50.70370 12.7% - 0s 0 0 50.54054 0 122 45.00000 50.54054 12.3% - 0s 0 0 50.21553 0 121 45.00000 50.21553 11.6% - 0s 0 0 50.05502 0 120 45.00000 50.05502 11.2% - 0s 0 0 49.99268 0 122 45.00000 49.99268 11.1% - 0s 0 0 49.94734 0 125 45.00000 49.94734 11.0% - 0s H 0 0 46.0000000 49.94734 8.58% - 0s 0 0 49.90716 0 125 46.00000 49.90716 8.49% - 0s 0 0 49.90716 0 124 46.00000 49.90716 8.49% - 0s H 0 0 47.0000000 49.90716 6.19% - 0s 0 2 49.90517 0 124 47.00000 49.90517 6.18% - 0s H 56 3 48.0000000 49.15761 2.41% 28.9 0s Cutting planes: Zero half: 81 Explored 60 nodes (2560 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%