Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:43:44 2012 Optimize a model with 179 rows, 436 columns and 436 nonzeros Model has 356 quadratic constraints Presolve time: 2.08s Presolved: 179 rows, 436 columns, 436 nonzeros Variable types: 356 continuous, 80 integer (80 binary) Root relaxation: objective 0.000000e+00, 40 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 93.0000000 - - - 2s 0 0 0.00000 0 3 93.00000 0.00000 100% - 2s 0 0 0.00000 0 75 93.00000 0.00000 100% - 2s 0 0 0.00000 0 68 93.00000 0.00000 100% - 2s 0 2 0.00000 0 68 93.00000 0.00000 100% - 2s * 40 38 23 40.0000000 3.54167 91.1% 45.2 2s * 67 55 19 38.0000000 3.61905 90.5% 40.6 2s * 92 62 15 33.0000000 3.67692 88.9% 39.8 2s * 530 227 15 32.0000000 14.62069 54.3% 39.6 2s 1605 420 31.63235 41 264 32.00000 18.33333 42.7% 35.2 5s * 2246 524 41 31.0000000 20.53571 33.8% 30.5 5s 4569 497 29.01449 38 262 31.00000 25.00000 19.4% 24.4 10s Explored 6032 nodes (138312 simplex iterations) in 12.72 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%