Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:20:10 2012 Optimize a model with 261 rows, 733 columns and 733 nonzeros Model has 520 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.03s Presolved: 261 rows, 716 columns, 716 nonzeros Variable types: 520 continuous, 196 integer (195 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 0 123.0000000 - - - 3s 0 0 0.00000 0 8 123.00000 0.00000 100% - 3s 0 0 0.00000 0 173 123.00000 0.00000 100% - 3s 0 0 0.00000 0 171 123.00000 0.00000 100% - 3s 0 2 0.00000 0 168 123.00000 0.00000 100% - 3s H 27 27 109.0000000 2.63333 97.6% 46.3 3s H 41 41 27.0000000 2.63333 90.2% 37.0 3s * 59 44 33 26.0000000 2.63333 89.9% 32.2 3s H 97 66 23.0000000 3.11111 86.5% 32.6 3s 607 273 9.76136 15 706 23.00000 9.76136 57.6% 32.7 5s * 2461 519 47 22.0000000 15.53571 29.4% 31.9 9s 2845 493 cutoff 39 22.00000 16.52000 24.9% 31.7 10s * 3870 163 43 21.0000000 18.71951 10.9% 30.2 11s Explored 4053 nodes (123331 simplex iterations) in 12.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%