Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:14:13 2012 Optimize a model with 11520 rows, 16512 columns and 50560 nonzeros Presolve removed 27 rows and 3456 columns Presolve time: 0.23s Presolved: 11493 rows, 13056 columns, 47104 nonzeros Variable types: 0 continuous, 13056 integer (13056 binary) Found heuristic solution: objective 40.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 9921 iterations, 0.40 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 34 3.00000 2.00000 33.3% - 1s 0 0 2.00000 0 174 3.00000 2.00000 33.3% - 3s 0 0 2.00000 0 240 3.00000 2.00000 33.3% - 10s 0 0 2.00000 0 34 3.00000 2.00000 33.3% - 20s 0 0 2.00000 0 137 3.00000 2.00000 33.3% - 26s 0 0 2.00000 0 240 3.00000 2.00000 33.3% - 32s 0 0 2.00000 0 240 3.00000 2.00000 33.3% - 41s 0 0 2.00000 0 34 3.00000 2.00000 33.3% - 45s 0 2 2.00000 0 34 3.00000 2.00000 33.3% - 47s 4 4 2.00000 1 34 3.00000 2.00000 33.3% 3219 50s 5 5 2.00000 1 141 3.00000 2.00000 33.3% 2575 58s 6 6 2.00000 1 191 3.00000 2.00000 33.3% 2146 70s 8 7 2.00000 1 70 3.00000 2.00000 33.3% 1610 79s 9 8 2.00000 1 34 3.00000 2.00000 33.3% 1431 89s 10 8 2.00000 1 70 3.00000 2.00000 33.3% 1288 97s Cutting planes: Gomory: 4 Zero half: 13 Explored 15 nodes (421569 simplex iterations) in 99.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%