Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:24:17 2012 Optimize a model with 807 rows, 178 columns and 1614 nonzeros Presolve removed 198 rows and 0 columns Presolve time: 0.00s Presolved: 609 rows, 178 columns, 1350 nonzeros Variable types: 0 continuous, 178 integer (178 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 6.910345e+01, 366 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.10345 0 168 50.00000 69.10345 38.2% - 0s H 0 0 51.0000000 69.10345 35.5% - 0s 0 0 67.65176 0 170 51.00000 67.65176 32.7% - 0s H 0 0 52.0000000 67.65176 30.1% - 0s H 0 0 53.0000000 67.65176 27.6% - 0s 0 0 67.40476 0 172 53.00000 67.40476 27.2% - 0s H 0 0 55.0000000 67.40476 22.6% - 0s 0 0 67.07876 0 171 55.00000 67.07876 22.0% - 0s H 0 0 56.0000000 67.07876 19.8% - 0s 0 0 66.62349 0 168 56.00000 66.62349 19.0% - 0s 0 0 66.35768 0 173 56.00000 66.35768 18.5% - 0s 0 0 66.27188 0 174 56.00000 66.27188 18.3% - 0s 0 0 66.20713 0 174 56.00000 66.20713 18.2% - 0s 0 0 66.14980 0 174 56.00000 66.14980 18.1% - 0s 0 0 65.99480 0 176 56.00000 65.99480 17.8% - 0s 0 0 65.94832 0 176 56.00000 65.94832 17.8% - 0s 0 0 65.91650 0 176 56.00000 65.91650 17.7% - 0s 0 0 65.84429 0 173 56.00000 65.84429 17.6% - 0s 0 0 65.83576 0 176 56.00000 65.83576 17.6% - 0s 0 0 65.83576 0 175 56.00000 65.83576 17.6% - 0s 0 2 65.83332 0 175 56.00000 65.83332 17.6% - 0s H 27 15 57.0000000 65.40185 14.7% 58.3 0s H 357 133 58.0000000 63.61272 9.68% 45.8 0s 613 214 60.33333 12 175 58.00000 63.11787 8.82% 43.6 5s 2677 647 59.83333 30 129 58.00000 61.36709 5.81% 36.9 10s Cutting planes: Gomory: 2 Clique: 1 Zero half: 74 Explored 5287 nodes (165820 simplex iterations) in 12.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%