Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:34 2012 Optimize a model with 401 rows, 127 columns and 802 nonzeros Presolve removed 64 rows and 0 columns Presolve time: 0.00s Presolved: 337 rows, 127 columns, 715 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 5.550000e+01, 191 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.50000 0 105 39.00000 55.50000 42.3% - 0s H 0 0 40.0000000 55.50000 38.8% - 0s H 0 0 41.0000000 55.50000 35.4% - 0s 0 0 53.75000 0 106 41.00000 53.75000 31.1% - 0s 0 0 53.00000 0 118 41.00000 53.00000 29.3% - 0s H 0 0 42.0000000 53.00000 26.2% - 0s H 0 0 44.0000000 53.00000 20.5% - 0s 0 0 52.46154 0 123 44.00000 52.46154 19.2% - 0s H 0 0 45.0000000 52.46154 16.6% - 0s 0 0 51.84956 0 122 45.00000 51.84956 15.2% - 0s 0 0 51.57337 0 123 45.00000 51.57337 14.6% - 0s 0 0 51.10253 0 125 45.00000 51.10253 13.6% - 0s 0 0 50.96350 0 126 45.00000 50.96350 13.3% - 0s 0 0 50.77346 0 126 45.00000 50.77346 12.8% - 0s 0 0 50.70921 0 126 45.00000 50.70921 12.7% - 0s 0 0 50.70921 0 126 45.00000 50.70921 12.7% - 0s 0 2 50.70645 0 126 45.00000 50.70645 12.7% - 0s H 14 10 46.0000000 50.69852 10.2% 29.1 0s H 165 19 47.0000000 49.62963 5.59% 26.6 0s Cutting planes: Zero half: 94 Explored 248 nodes (7084 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%