Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:52 2012 Optimize a model with 443 rows, 134 columns and 886 nonzeros Presolve removed 96 rows and 2 columns Presolve time: 0.00s Presolved: 347 rows, 132 columns, 754 nonzeros Variable types: 0 continuous, 132 integer (132 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 5.670833e+01, 223 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56.70833 0 126 48.00000 56.70833 18.1% - 0s 0 0 55.17241 0 126 48.00000 55.17241 14.9% - 0s 0 0 54.64865 0 127 48.00000 54.64865 13.9% - 0s 0 0 54.28571 0 124 48.00000 54.28571 13.1% - 0s 0 0 53.94444 0 129 48.00000 53.94444 12.4% - 0s 0 0 53.55756 0 132 48.00000 53.55756 11.6% - 0s 0 0 53.51429 0 128 48.00000 53.51429 11.5% - 0s 0 0 53.31058 0 128 48.00000 53.31058 11.1% - 0s 0 0 53.23846 0 130 48.00000 53.23846 10.9% - 0s 0 0 53.19048 0 130 48.00000 53.19048 10.8% - 0s 0 0 53.18819 0 130 48.00000 53.18819 10.8% - 0s 0 0 53.18819 0 127 48.00000 53.18819 10.8% - 0s H 0 0 49.0000000 53.18819 8.55% - 0s 0 2 53.18819 0 127 49.00000 53.18819 8.55% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 91 Explored 448 nodes (9435 simplex iterations) in 0.34 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%