Gurobi 5.0.1 (linux64) logging started Sun Nov 18 10:05:50 2012 Optimize a model with 323 rows, 890 columns and 890 nonzeros Model has 644 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 3.76s Presolved: 323 rows, 877 columns, 877 nonzeros Variable types: 644 continuous, 233 integer (232 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 0 162.0000000 - - - 3s 0 0 0.00000 0 3 162.00000 0.00000 100% - 3s 0 0 0.00000 0 3 162.00000 0.00000 100% - 3s 0 0 0.00000 0 2 162.00000 0.00000 100% - 3s 0 2 0.00000 0 2 162.00000 0.00000 100% - 3s H 50 50 46.0000000 0.09836 100% 40.4 3s * 63 63 45 41.0000000 0.09836 100% 36.1 3s H 81 67 39.0000000 0.67692 98.3% 39.9 4s * 111 92 36 34.0000000 0.67692 98.0% 33.2 4s * 272 182 20 33.0000000 1.04000 96.8% 31.9 4s 603 349 13.33702 8 543 33.00000 5.91122 82.1% 31.4 5s * 859 430 44 32.0000000 6.68484 79.1% 40.7 6s H 890 399 28.0000000 6.77193 75.8% 41.1 6s 2055 563 19.50000 28 523 28.00000 15.64815 44.1% 36.1 10s H 2219 597 27.0000000 15.99053 40.8% 35.9 10s 2939 739 19.78392 31 505 27.00000 17.25600 36.1% 34.8 15s 3495 829 19.43077 29 503 27.00000 17.91681 33.6% 34.5 20s 4544 944 23.32065 31 536 27.00000 19.00000 29.6% 33.8 25s 5599 943 22.62694 29 510 27.00000 20.20896 25.2% 33.8 30s 6599 891 24.95467 34 549 27.00000 20.90510 22.6% 33.2 35s 7714 742 cutoff 34 27.00000 21.73333 19.5% 33.4 40s 8593 567 25.44262 31 506 27.00000 22.37721 17.1% 33.5 45s 9358 354 24.80488 33 495 27.00000 23.00227 14.8% 33.4 50s Explored 10125 nodes (336602 simplex iterations) in 53.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%