Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:26:53 2012 Optimize a model with 1 rows, 151 columns and 151 nonzeros Model has 140 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 141 rows, 269 columns, 549 nonzeros Variable types: 0 continuous, 269 integer (268 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 179 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 47 43.00000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 36.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 39 21.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 19.00000 0.00000 100% - 0s 0 0 0.00000 0 24 19.00000 0.00000 100% - 0s 0 0 0.00000 0 18 19.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 17.00000 0.00000 100% - 0s 0 0 0.00000 0 22 17.00000 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 20 14.00000 0.00000 100% - 0s H 27 27 12.0000000 0.00000 100% 1.4 0s H 81 57 11.0000000 0.00000 100% 1.9 0s H 325 233 10.0000000 0.00000 100% 5.1 0s H 442 274 9.0000000 0.00000 100% 6.6 0s H 446 215 7.0000000 0.00000 100% 6.5 0s H 489 187 6.0000000 0.00000 100% 8.6 0s H 516 133 5.0000000 0.00000 100% 11.9 0s * 527 96 10 4.0000000 0.00000 100% 12.1 0s Cutting planes: Cover: 261 Explored 628 nodes (14770 simplex iterations) in 0.26 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%