Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:00:38 2012 Optimize a model with 731 rows, 170 columns and 1462 nonzeros Presolve removed 160 rows and 0 columns Presolve time: 0.00s Presolved: 571 rows, 170 columns, 1251 nonzeros Variable types: 0 continuous, 170 integer (170 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.950000e+01, 279 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.50000 0 135 48.00000 69.50000 44.8% - 0s 0 0 68.50000 0 131 48.00000 68.50000 42.7% - 0s H 0 0 50.0000000 68.50000 37.0% - 0s 0 0 67.96984 0 169 50.00000 67.96984 35.9% - 0s 0 0 66.84491 0 169 50.00000 66.84491 33.7% - 0s H 0 0 53.0000000 66.84491 26.1% - 0s 0 0 66.30417 0 167 53.00000 66.30417 25.1% - 0s 0 0 65.91367 0 168 53.00000 65.91367 24.4% - 0s 0 0 65.66451 0 168 53.00000 65.66451 23.9% - 0s 0 0 65.50293 0 168 53.00000 65.50293 23.6% - 0s 0 0 65.42057 0 167 53.00000 65.42057 23.4% - 0s 0 0 65.31401 0 166 53.00000 65.31401 23.2% - 0s H 0 0 54.0000000 65.31401 21.0% - 0s 0 0 65.21761 0 168 54.00000 65.21761 20.8% - 0s 0 0 65.18021 0 167 54.00000 65.18021 20.7% - 0s 0 0 65.11930 0 169 54.00000 65.11930 20.6% - 0s 0 0 65.10555 0 169 54.00000 65.10555 20.6% - 0s 0 0 65.10555 0 168 54.00000 65.10555 20.6% - 0s 0 2 65.10514 0 168 54.00000 65.10514 20.6% - 0s H 27 19 55.0000000 64.77448 17.8% 62.3 0s H 50 30 56.0000000 64.76561 15.7% 58.3 0s H 52 29 57.0000000 64.76561 13.6% 57.4 0s 611 189 59.76389 18 167 57.00000 61.91437 8.62% 47.4 5s 692 229 61.11111 20 145 57.00000 61.91437 8.62% 54.5 10s 2192 430 59.05724 17 131 57.00000 60.44413 6.04% 48.3 15s Cutting planes: Gomory: 3 Zero half: 219 Explored 4373 nodes (173681 simplex iterations) in 19.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%