Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:00:58 2012 Optimize a model with 222 rows, 638 columns and 638 nonzeros Model has 442 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 2.58s Presolved: 222 rows, 618 columns, 618 nonzeros Variable types: 442 continuous, 176 integer (175 binary) Root relaxation: objective 0.000000e+00, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 113.0000000 - - - 2s 0 0 0.00000 0 9 113.00000 0.00000 100% - 2s 0 0 0.00000 0 6 113.00000 0.00000 100% - 2s 0 0 0.00000 0 4 113.00000 0.00000 100% - 2s 0 2 0.00000 0 4 113.00000 0.00000 100% - 2s H 41 39 24.0000000 0.39167 98.4% 41.0 2s * 45 38 32 23.0000000 0.39167 98.3% 40.8 2s H 79 55 20.0000000 1.00000 95.0% 30.0 2s * 83 55 30 19.0000000 1.00000 94.7% 30.7 2s * 109 63 22 17.0000000 1.73827 89.8% 32.1 2s * 188 81 24 16.0000000 3.37037 78.9% 26.6 2s 1000 152 15.38129 32 351 16.00000 9.77343 38.9% 32.3 5s * 1272 105 43 15.0000000 10.28125 31.5% 30.7 5s Explored 1572 nodes (47289 simplex iterations) in 6.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%