Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:57:16 2014 Optimize a model with 12996 rows, 12883 columns and 51189 nonzeros Presolve time: 0.24s Presolved: 12996 rows, 12883 columns, 51189 nonzeros Variable types: 1 continuous, 12882 integer (12882 binary) Found heuristic solution: objective 1.2137630 Found heuristic solution: objective 0.9825085 Found heuristic solution: objective 0.9503939 Root relaxation: objective 1.172412e-01, 4932 iterations, 0.60 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.11724 0 974 0.95039 0.11724 87.7% - 1s H 0 0 0.7821301 0.11724 85.0% - 1s H 0 0 0.2245191 0.11724 47.8% - 2s 0 0 0.12981 0 850 0.22452 0.12981 42.2% - 3s 0 0 0.14909 0 633 0.22452 0.14909 33.6% - 3s H 0 0 0.2139760 0.14909 30.3% - 3s 0 0 0.15801 0 512 0.21398 0.15801 26.2% - 3s H 0 0 0.2094041 0.15801 24.5% - 3s 0 0 0.16172 0 482 0.20940 0.16172 22.8% - 3s 0 0 0.16505 0 451 0.20940 0.16505 21.2% - 3s H 0 0 0.2061436 0.16505 19.9% - 3s 0 0 0.16738 0 431 0.20614 0.16738 18.8% - 3s H 0 0 0.2042657 0.16738 18.1% - 3s 0 0 0.16865 0 421 0.20427 0.16865 17.4% - 4s 0 0 0.16865 0 424 0.20427 0.16865 17.4% - 4s 0 0 0.16865 0 333 0.20427 0.16865 17.4% - 4s H 0 0 0.1923565 0.16865 12.3% - 4s 0 0 0.17349 0 182 0.19236 0.17349 9.81% - 4s H 0 0 0.1919220 0.17349 9.60% - 4s 0 0 0.17461 0 220 0.19192 0.17461 9.02% - 4s 0 1 0.17465 0 219 0.19192 0.17465 9.00% - 4s Explored 3 nodes (27691 simplex iterations) in 4.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.919219766239e-01, best bound 1.919219766239e-01, gap 0.0%