Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:37:18 2012 Optimize a model with 1 rows, 169 columns and 169 nonzeros Model has 160 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 161 rows, 301 columns, 621 nonzeros Variable types: 0 continuous, 301 integer (300 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 0.000000e+00, 201 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 43 42.00000 0.00000 100% - 0s 0 0 0.00000 0 28 42.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 0 0.00000 0 34 28.00000 0.00000 100% - 0s 0 0 0.00000 0 34 28.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 2 0.00000 0 34 22.00000 0.00000 100% - 0s H 112 91 18.0000000 0.00000 100% 4.7 0s H 152 111 15.0000000 0.00000 100% 5.1 0s H 162 118 14.0000000 0.00000 100% 4.9 0s H 282 195 13.0000000 0.00000 100% 7.5 0s H 351 200 11.0000000 0.00000 100% 8.4 0s H 378 166 9.0000000 0.00000 100% 8.7 0s H 390 161 8.0000000 0.00000 100% 8.6 0s * 398 147 27 7.0000000 0.00000 100% 8.5 0s * 476 127 18 6.0000000 0.38462 93.6% 11.9 0s Cutting planes: Cover: 313 Explored 617 nodes (17080 simplex iterations) in 0.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%