Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:55 2012 Optimize a model with 1 rows, 168 columns and 168 nonzeros Model has 148 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 149 rows, 290 columns, 586 nonzeros Variable types: 0 continuous, 290 integer (289 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 0.000000e+00, 187 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 45 47.00000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 39.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 22.00000 0.00000 100% - 0s 0 0 0.00000 0 25 22.00000 0.00000 100% - 0s 0 0 0.00000 0 18 22.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 18.00000 0.00000 100% - 0s 0 0 0.00000 0 15 18.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 2 0.00000 0 15 14.00000 0.00000 100% - 0s H 27 27 11.0000000 0.00000 100% 1.4 0s H 54 38 10.0000000 0.00000 100% 2.4 0s H 108 70 9.0000000 0.00000 100% 2.5 0s H 216 122 8.0000000 0.00000 100% 4.4 0s H 517 246 7.0000000 0.00000 100% 7.3 0s H 544 197 6.0000000 0.00000 100% 8.2 0s * 559 153 16 5.0000000 0.00000 100% 8.5 0s * 583 108 11 4.0000000 0.91667 77.1% 9.9 0s Cutting planes: Cover: 280 Explored 696 nodes (15183 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%