Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:11 2012 Optimize a model with 506 rows, 138 columns and 1012 nonzeros Presolve removed 100 rows and 0 columns Presolve time: 0.00s Presolved: 406 rows, 138 columns, 877 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.750000e+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 57.50000 0 103 42.00000 57.50000 36.9% - 0s 0 0 56.00000 0 106 42.00000 56.00000 33.3% - 0s H 0 0 43.0000000 56.00000 30.2% - 0s 0 0 55.89286 0 127 43.00000 55.89286 30.0% - 0s H 0 0 46.0000000 55.89286 21.5% - 0s 0 0 54.96552 0 133 46.00000 54.96552 19.5% - 0s 0 0 54.38333 0 136 46.00000 54.38333 18.2% - 0s H 0 0 48.0000000 54.38333 13.3% - 0s 0 0 54.02500 0 133 48.00000 54.02500 12.6% - 0s 0 0 53.93750 0 131 48.00000 53.93750 12.4% - 0s 0 0 53.59585 0 135 48.00000 53.59585 11.7% - 0s 0 0 53.37165 0 136 48.00000 53.37165 11.2% - 0s 0 0 53.22590 0 135 48.00000 53.22590 10.9% - 0s 0 0 53.22338 0 136 48.00000 53.22338 10.9% - 0s 0 0 53.22338 0 131 48.00000 53.22338 10.9% - 0s 0 2 53.22338 0 131 48.00000 53.22338 10.9% - 0s * 103 21 10 49.0000000 52.39237 6.92% 33.7 0s Cutting planes: Gomory: 2 Zero half: 96 Explored 262 nodes (8859 simplex iterations) in 0.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%