Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:39:32 2012 Optimize a model with 175 rows, 427 columns and 427 nonzeros Model has 348 quadratic constraints Presolve time: 2.03s Presolved: 175 rows, 427 columns, 427 nonzeros Variable types: 348 continuous, 79 integer (79 binary) Root relaxation: objective 0.000000e+00, 39 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 89.0000000 - - - 2s 0 0 0.00000 0 21 89.00000 0.00000 100% - 2s 0 0 0.00000 0 23 89.00000 0.00000 100% - 2s 0 0 0.00000 0 21 89.00000 0.00000 100% - 2s 0 2 0.00000 0 20 89.00000 0.00000 100% - 2s H 41 41 50.0000000 3.05556 93.9% 33.2 2s * 46 42 33 49.0000000 3.05556 93.8% 31.8 2s * 78 53 23 41.0000000 5.32540 87.0% 31.1 2s H 158 101 36.0000000 7.80000 78.3% 30.0 2s H 514 265 35.0000000 14.03645 59.9% 27.7 2s 1744 584 28.50000 44 242 35.00000 16.07196 54.1% 28.9 5s * 2223 786 61 34.0000000 17.70881 47.9% 26.7 5s H 2225 732 33.0000000 17.70881 46.3% 26.7 5s H 3060 896 32.0000000 20.10560 37.2% 24.4 6s H 4499 979 31.0000000 22.57251 27.2% 22.5 8s 4671 984 27.26667 35 242 31.00000 22.83333 26.3% 22.3 10s 6623 834 26.43454 42 244 31.00000 25.54630 17.6% 21.2 15s Explored 8416 nodes (169508 simplex iterations) in 17.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%