Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:07:11 2012 Optimize a model with 469 rows, 438 columns and 1608 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 469 rows, 422 columns, 1592 nonzeros Variable types: 0 continuous, 422 integer (421 binary) Found heuristic solution: objective 95.0000000 Root relaxation: objective 0.000000e+00, 243 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 0 178 95.00000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s 0 0 0.28788 0 180 63.00000 0.28788 100% - 0s H 0 0 55.0000000 0.28788 99.5% - 0s 0 0 0.87236 0 182 55.00000 0.87236 98.4% - 0s H 0 0 54.0000000 0.87236 98.4% - 0s H 0 0 41.0000000 0.87236 97.9% - 0s 0 0 0.87332 0 184 41.00000 0.87332 97.9% - 0s 0 0 0.87332 0 184 41.00000 0.87332 97.9% - 0s H 0 0 37.0000000 0.87332 97.6% - 0s 0 2 0.87403 0 184 37.00000 0.87403 97.6% - 0s * 36 34 19 16.0000000 1.00000 93.8% 32.4 0s * 136 79 19 15.0000000 2.34309 84.4% 33.5 0s 3857 364 12.75177 25 163 15.00000 11.08333 26.1% 23.6 5s Explored 4907 nodes (115732 simplex iterations) in 6.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%