Gurobi 5.0.1 (linux64) logging started Wed Dec 19 18:31:49 2012 Optimize a model with 7502 rows, 7320 columns and 32578 nonzeros Presolve removed 358 rows and 120 columns Presolve time: 0.10s Presolved: 7144 rows, 7200 columns, 31917 nonzeros Variable types: 3540 continuous, 3660 integer (3660 binary) Root relaxation: objective 4.010302e+02, 11155 iterations, 1.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 401.03020 0 128 - 401.03020 - - 1s 0 0 466.90510 0 111 - 466.90510 - - 2s 0 0 486.66237 0 101 - 486.66237 - - 3s 0 0 506.16713 0 97 - 506.16713 - - 3s 0 0 529.07076 0 91 - 529.07076 - - 3s 0 0 529.86975 0 95 - 529.86975 - - 3s 0 0 530.04763 0 103 - 530.04763 - - 3s 0 0 530.08814 0 99 - 530.08814 - - 4s 0 0 530.08814 0 99 - 530.08814 - - 4s 0 0 530.08815 0 96 - 530.08815 - - 6s 0 0 530.08815 0 91 - 530.08815 - - 6s 0 2 534.85860 0 91 - 534.85860 - - 7s 7 7 590.67571 6 88 - 574.69732 - 559 10s 100 64 608.93035 31 41 - 590.44154 - 221 15s * 252 60 20 605.0000000 595.63963 1.55% 151 18s 376 36 600.65753 13 52 605.00000 600.65753 0.72% 116 20s Cutting planes: Gomory: 5 Cover: 50 Implied bound: 10 Flow cover: 36 GUB cover: 15 Explored 415 nodes (63432 simplex iterations) in 20.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.050000000000e+02, best bound 6.050000000000e+02, gap 0.0%