Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:13:03 2012 Optimize a model with 172 rows, 369 columns and 369 nonzeros Model has 342 quadratic constraints Presolve time: 1.98s Presolved: 172 rows, 369 columns, 369 nonzeros Variable types: 342 continuous, 27 integer (27 binary) Root relaxation: objective 0.000000e+00, 13 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 89.0000000 - - - 1s 0 0 0.00000 0 22 89.00000 0.00000 100% - 1s 0 0 0.38384 0 27 89.00000 0.38384 100% - 1s 0 0 0.38384 0 27 89.00000 0.38384 100% - 2s 0 2 0.38384 0 27 89.00000 0.38384 100% - 2s * 39 39 20 84.0000000 6.72727 92.0% 37.3 2s * 40 38 20 83.0000000 6.72727 91.9% 36.4 2s * 43 35 19 82.0000000 6.72727 91.8% 34.5 2s H 54 42 81.0000000 6.80519 91.6% 36.2 2s H 72 56 74.0000000 6.80519 90.8% 37.2 2s H 157 116 72.0000000 9.90909 86.2% 36.5 2s * 159 109 20 68.0000000 9.90909 85.4% 36.1 2s 2072 777 cutoff 43 68.00000 32.70959 51.9% 30.9 5s * 6911 2024 47 67.0000000 46.00000 31.3% 23.2 9s 7931 2097 56.50000 44 199 67.00000 47.57143 29.0% 22.9 10s 10574 2144 58.64367 40 192 67.00000 51.25000 23.5% 22.3 15s 15699 1748 60.38889 40 220 67.00000 56.35294 15.9% 21.3 20s H17750 1289 66.0000000 58.51974 11.3% 21.0 21s Explored 19827 nodes (404036 simplex iterations) in 23.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.600000000000e+01, best bound 6.600000000000e+01, gap 0.0%