Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:30 2012 Optimize a model with 1 rows, 167 columns and 167 nonzeros Model has 139 quadratic objective terms Presolve removed 0 rows and 32 columns Presolve time: 0.00s Presolved: 140 rows, 274 columns, 552 nonzeros Variable types: 0 continuous, 274 integer (273 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 0.000000e+00, 168 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 40 40.00000 0.00000 100% - 0s 0 0 0.00000 0 32 40.00000 0.00000 100% - 0s H 0 0 35.0000000 0.00000 100% - 0s 0 0 0.00000 0 75 35.00000 0.00000 100% - 0s 0 0 0.00000 0 29 35.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 2 0.00000 0 21 15.00000 0.00000 100% - 0s H 54 47 14.0000000 0.00000 100% 2.2 0s H 81 65 11.0000000 0.00000 100% 2.5 0s H 135 106 10.0000000 0.00000 100% 2.8 0s H 411 245 8.0000000 0.00000 100% 7.4 0s * 420 217 22 7.0000000 0.00000 100% 7.6 0s H 432 206 6.0000000 0.00000 100% 8.1 0s * 506 178 16 5.0000000 0.00000 100% 9.8 0s * 510 126 7 4.0000000 0.00000 100% 10.2 0s * 587 38 7 3.0000000 2.00000 33.3% 19.0 0s Cutting planes: Cover: 265 Explored 626 nodes (13575 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%