Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:20:00 2012 Optimize a model with 1 rows, 28 columns and 28 nonzeros Model has 200 quadratic objective terms Modified 28 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 28 columns, 28 nonzeros Presolved model has 228 quadratic objective terms Variable types: 0 continuous, 28 integer (28 binary) Found heuristic solution: objective 88.0000000 Root relaxation: objective 0.000000e+00, 30 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 28 88.00000 0.00000 100% - 0s 0 2 4.72222 0 28 88.00000 4.72222 94.6% - 0s H 52 44 86.0000000 8.35217 90.3% 2.0 0s * 555 407 15 83.0000000 18.04132 78.3% 2.0 0s * 557 395 16 81.0000000 18.04132 77.7% 2.1 0s * 559 391 17 80.0000000 18.04132 77.4% 2.1 0s H 2599 1150 79.0000000 32.10590 59.4% 2.1 0s 66916 24384 74.03472 35 8 79.00000 54.98870 30.4% 2.0 5s 136151 40045 76.68681 34 9 79.00000 59.38895 24.8% 2.0 10s 201760 50695 75.96051 34 9 79.00000 61.94790 21.6% 2.0 15s 266071 57377 66.39354 31 12 79.00000 63.85195 19.2% 2.0 20s 334340 61101 73.95733 32 11 79.00000 65.46000 17.1% 2.0 25s 399947 61513 77.14235 34 9 79.00000 66.82080 15.4% 2.0 30s 465018 58663 73.18890 33 10 79.00000 68.00084 13.9% 2.0 35s 527874 52954 77.56513 33 10 79.00000 69.13807 12.5% 2.0 40s 596939 43197 72.36353 34 9 79.00000 70.59082 10.6% 2.0 45s 662704 28249 72.54128 33 10 79.00000 72.54128 8.18% 2.0 50s Explored 728336 nodes (1473099 simplex iterations) in 54.95 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.900000000000e+01, best bound 7.900000000000e+01, gap 0.0%