Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:08:30 2012 Optimize a model with 4311 rows, 131 columns and 8622 nonzeros Presolve removed 3120 rows and 0 columns Presolve time: 0.15s Presolved: 1191 rows, 131 columns, 8471 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.665160e+01, 555 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.65160 0 126 7.00000 16.65160 138% - 0s H 0 0 8.0000000 16.65160 108% - 0s 0 0 16.32722 0 129 8.00000 16.32722 104% - 0s 0 0 16.22929 0 129 8.00000 16.22929 103% - 0s 0 0 16.20178 0 130 8.00000 16.20178 103% - 0s 0 0 16.19536 0 130 8.00000 16.19536 102% - 1s H 0 0 10.0000000 16.19536 62.0% - 1s 0 0 16.18585 0 131 10.00000 16.18585 61.9% - 1s 0 0 16.17661 0 131 10.00000 16.17661 61.8% - 1s 0 0 16.16367 0 131 10.00000 16.16367 61.6% - 1s 0 0 16.15398 0 131 10.00000 16.15398 61.5% - 1s 0 0 16.15063 0 131 10.00000 16.15063 61.5% - 1s 0 0 16.15026 0 131 10.00000 16.15026 61.5% - 2s 0 2 16.14107 0 131 10.00000 16.14107 61.4% - 2s Cutting planes: Clique: 103 Explored 354 nodes (30656 simplex iterations) in 4.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%