Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:24 2012 Optimize a model with 401 rows, 121 columns and 802 nonzeros Presolve removed 77 rows and 0 columns Presolve time: 0.00s Presolved: 324 rows, 121 columns, 693 nonzeros Variable types: 0 continuous, 121 integer (121 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 5.100000e+01, 169 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.00000 0 88 40.00000 51.00000 27.5% - 0s 0 0 49.25000 0 94 40.00000 49.25000 23.1% - 0s H 0 0 41.0000000 49.25000 20.1% - 0s 0 0 49.12500 0 107 41.00000 49.12500 19.8% - 0s 0 0 48.80000 0 111 41.00000 48.80000 19.0% - 0s H 0 0 42.0000000 48.80000 16.2% - 0s 0 0 48.45108 0 114 42.00000 48.45108 15.4% - 0s 0 0 48.11148 0 116 42.00000 48.11148 14.6% - 0s 0 0 47.96912 0 117 42.00000 47.96912 14.2% - 0s 0 0 47.92224 0 116 42.00000 47.92224 14.1% - 0s 0 0 47.79000 0 109 42.00000 47.79000 13.8% - 0s H 0 0 43.0000000 47.79000 11.1% - 0s 0 0 47.57012 0 109 43.00000 47.57012 10.6% - 0s 0 0 47.49393 0 115 43.00000 47.49393 10.5% - 0s 0 0 47.44637 0 112 43.00000 47.44637 10.3% - 0s 0 0 47.41110 0 113 43.00000 47.41110 10.3% - 0s 0 0 47.41110 0 113 43.00000 47.41110 10.3% - 0s 0 2 47.41056 0 112 43.00000 47.41056 10.3% - 0s H 27 10 44.0000000 46.95522 6.72% 23.7 0s * 78 5 6 45.0000000 46.33333 2.96% 24.8 0s Cutting planes: Gomory: 1 Zero half: 76 Explored 88 nodes (2959 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%