Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:34:53 2012 Optimize a model with 271 rows, 758 columns and 758 nonzeros Model has 540 quadratic constraints Presolve removed 0 rows and 15 columns Presolve time: 3.15s Presolved: 271 rows, 743 columns, 743 nonzeros Variable types: 540 continuous, 203 integer (202 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 0 141.0000000 - - - 3s 0 0 0.00000 0 56 141.00000 0.00000 100% - 3s 0 0 0.00000 0 8 141.00000 0.00000 100% - 3s 0 0 0.00000 0 150 141.00000 0.00000 100% - 3s 0 2 0.00000 0 149 141.00000 0.00000 100% - 3s H 48 48 32.0000000 2.20564 93.1% 61.1 3s * 56 56 32 30.0000000 2.20564 92.6% 56.2 3s H 101 81 27.0000000 2.21053 91.8% 46.5 3s * 116 85 38 26.0000000 2.21053 91.5% 42.8 3s * 180 122 48 25.0000000 3.14815 87.4% 36.8 3s H 269 167 24.0000000 4.76667 80.1% 32.7 3s H 565 191 21.0000000 6.78571 67.7% 28.6 4s 706 238 7.76923 10 459 21.00000 7.76923 63.0% 32.1 5s 2198 574 17.63128 32 440 21.00000 11.00000 47.6% 40.0 10s 4502 1016 19.38462 31 454 21.00000 13.95238 33.6% 35.1 15s 6798 1093 20.34230 33 322 21.00000 15.41639 26.6% 34.5 20s 9229 1021 19.57407 35 403 21.00000 16.82927 19.9% 33.3 25s 11695 674 19.50000 30 472 21.00000 18.00000 14.3% 32.8 30s Explored 13528 nodes (428831 simplex iterations) in 33.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.099999999895e+01, best bound 2.099999999895e+01, gap 0.0%