Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:17:36 2012 Optimize a model with 1 rows, 28 columns and 28 nonzeros Model has 185 quadratic objective terms Modified 28 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 28 columns, 28 nonzeros Presolved model has 213 quadratic objective terms Variable types: 0 continuous, 28 integer (28 binary) Found heuristic solution: objective 100.0000000 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 28 100.00000 0.00000 100% - 0s H 0 0 92.0000000 0.00000 100% - 0s H 0 0 88.0000000 0.00000 100% - 0s 0 2 2.55958 0 28 88.00000 2.55958 97.1% - 0s H 10 10 87.0000000 7.25214 91.7% 1.8 0s H 60 48 85.0000000 7.30901 91.4% 2.0 0s H 90 77 81.0000000 7.30901 91.0% 2.0 0s H 106 74 78.0000000 10.61333 86.4% 2.0 0s H 150 107 77.0000000 10.71555 86.1% 2.0 0s * 529 390 15 72.0000000 15.36108 78.7% 2.0 0s H 808 530 71.0000000 16.49075 76.8% 2.1 0s 74690 25420 61.79375 31 12 71.00000 50.74973 28.5% 2.0 5s 152676 40319 67.65153 33 10 71.00000 54.95362 22.6% 2.0 10s 229603 48490 60.09872 31 12 71.00000 57.52535 19.0% 2.0 15s 304889 50991 59.43117 30 13 71.00000 59.43117 16.3% 2.0 20s 380386 47931 61.01559 32 11 71.00000 61.01559 14.1% 2.0 25s 454656 39849 67.09668 32 11 71.00000 62.63558 11.8% 2.0 30s 534392 23232 67.85279 35 8 71.00000 65.07259 8.35% 2.0 35s Explored 587805 nodes (1182644 simplex iterations) in 38.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.100000000000e+01, best bound 7.100000000000e+01, gap 0.0%