Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:11:14 2013 Optimize a model with 8280 rows, 12040 columns and 40020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.23s Presolved: 8220 rows, 12000 columns, 31960 nonzeros Variable types: 8020 continuous, 3980 integer (3980 binary) Root relaxation: objective 4.013975e+04, 2815 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40139.7487 0 2 - 40139.7487 - - 0s 0 0 40144.2918 0 2 - 40144.2918 - - 0s 0 0 40144.2942 0 2 - 40144.2942 - - 0s 0 2 40144.4507 0 2 - 40144.4507 - - 1s * 46 46 32 40214.399455 40145.8737 0.17% 31.7 1s H 90 75 40213.609111 40150.0755 0.16% 17.8 2s * 92 74 28 40212.917072 40150.0755 0.16% 18.3 2s H 129 101 40209.366345 40151.6413 0.14% 13.7 2s H 600 402 40208.441498 40162.3470 0.11% 5.2 4s H 743 454 40206.893325 40162.3470 0.11% 5.5 4s 959 538 40206.5681 35 1 40206.8933 40162.3470 0.11% 4.8 5s H 1067 524 40203.635462 40162.3470 0.10% 4.5 5s H 1072 497 40202.958037 40162.3470 0.10% 4.5 5s * 1758 661 33 40202.118489 40169.7719 0.08% 3.5 5s H 4405 1822 40199.350733 40178.1216 0.05% 2.4 7s H 4577 1887 40199.244071 40178.6689 0.05% 2.4 7s H 4579 1849 40198.954231 40178.6689 0.05% 2.4 7s * 4583 1821 34 40198.759237 40178.6689 0.05% 2.4 7s * 6770 2191 32 40196.973735 40183.1333 0.03% 2.2 9s 7612 2304 40195.4231 28 2 40196.9737 40184.3537 0.03% 2.2 10s H 8722 1907 40195.185018 40185.9862 0.02% 2.2 10s Cutting planes: Gomory: 2 Flow cover: 2 Explored 12118 nodes (28729 simplex iterations) in 14.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.019518501810e+04, best bound 4.019117547239e+04, gap 0.0100%