Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:26:31 2012 Optimize a model with 567 rows, 512 columns and 1927 nonzeros Presolve removed 0 rows and 13 columns Presolve time: 0.00s Presolved: 567 rows, 499 columns, 1914 nonzeros Variable types: 0 continuous, 499 integer (498 binary) Found heuristic solution: objective 105.0000000 Root relaxation: objective 0.000000e+00, 282 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 206 105.00000 0.00000 100% - 0s H 0 0 90.0000000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 0.29034 0 208 79.00000 0.29034 100% - 0s H 0 0 53.0000000 0.29034 99.5% - 0s 0 0 0.83311 0 211 53.00000 0.83311 98.4% - 0s H 0 0 40.0000000 0.83311 97.9% - 0s 0 0 0.83311 0 210 40.00000 0.83311 97.9% - 0s 0 2 0.83762 0 210 40.00000 0.83762 97.9% - 0s * 63 47 39 21.0000000 1.00000 95.2% 27.4 0s 3154 426 19.14815 22 197 21.00000 15.00000 28.6% 28.6 5s Explored 5660 nodes (152965 simplex iterations) in 8.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%