Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012 Optimize a model with 375 rows, 123 columns and 750 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.00s Presolved: 304 rows, 123 columns, 653 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.350000e+01, 184 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 95 41.00000 53.50000 30.5% - 0s H 0 0 42.0000000 53.50000 27.4% - 0s 0 0 52.75000 0 101 42.00000 52.75000 25.6% - 0s H 0 0 43.0000000 52.75000 22.7% - 0s 0 0 52.03571 0 121 43.00000 52.03571 21.0% - 0s H 0 0 44.0000000 52.03571 18.3% - 0s 0 0 50.92308 0 116 44.00000 50.92308 15.7% - 0s 0 0 50.48780 0 114 44.00000 50.48780 14.7% - 0s 0 0 50.29091 0 117 44.00000 50.29091 14.3% - 0s 0 0 50.25200 0 116 44.00000 50.25200 14.2% - 0s 0 0 50.00000 0 110 44.00000 50.00000 13.6% - 0s H 0 0 45.0000000 50.00000 11.1% - 0s 0 0 49.87153 0 121 45.00000 49.87153 10.8% - 0s 0 0 49.80479 0 120 45.00000 49.80479 10.7% - 0s 0 0 49.77245 0 119 45.00000 49.77245 10.6% - 0s 0 0 49.65041 0 120 45.00000 49.65041 10.3% - 0s 0 0 49.61111 0 120 45.00000 49.61111 10.2% - 0s 0 0 49.61111 0 120 45.00000 49.61111 10.2% - 0s H 0 0 47.0000000 49.61111 5.56% - 0s 0 2 49.61111 0 120 47.00000 49.61111 5.56% - 0s Cutting planes: Zero half: 79 Explored 35 nodes (2007 simplex iterations) in 0.11 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%