Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:14:09 2012 Optimize a model with 250 rows, 708 columns and 708 nonzeros Model has 498 quadratic constraints Presolve removed 0 rows and 30 columns Presolve time: 2.91s Presolved: 250 rows, 678 columns, 678 nonzeros Variable types: 498 continuous, 180 integer (179 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 126.0000000 - - - 2s 0 0 0.00000 0 53 126.00000 0.00000 100% - 2s 0 0 0.00000 0 12 126.00000 0.00000 100% - 2s 0 0 0.00000 0 108 126.00000 0.00000 100% - 2s 0 2 0.00000 0 108 126.00000 0.00000 100% - 3s H 47 47 28.0000000 3.01725 89.2% 36.9 3s * 47 47 31 26.0000000 3.01725 88.4% 37.3 3s H 203 143 25.0000000 3.32379 86.7% 23.5 3s * 663 365 38 24.0000000 7.41683 69.1% 31.7 4s 670 362 8.06061 12 641 24.00000 7.41683 69.1% 31.8 5s * 778 375 33 23.0000000 7.41683 67.8% 35.6 5s * 782 352 35 22.0000000 7.41683 66.3% 35.6 5s H 2652 531 21.0000000 13.29630 36.7% 33.6 9s H 2681 475 20.0000000 13.42069 32.9% 33.7 10s 3202 449 17.35570 33 387 20.00000 14.83333 25.8% 32.7 15s Explored 4238 nodes (138471 simplex iterations) in 18.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%