Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:26 2013 Optimize a model with 1280 rows, 7040 columns and 16020 nonzeros Presolve removed 40 rows and 60 columns Presolve time: 0.08s Presolved: 1240 rows, 6980 columns, 13960 nonzeros Variable types: 6000 continuous, 980 integer (980 binary) Root relaxation: objective 3.573401e+04, 457 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 3 - 35734.0139 - - 0s 0 0 35760.3509 0 6 - 35760.3509 - - 0s 0 0 35762.0782 0 6 - 35762.0782 - - 0s 0 0 35764.0586 0 7 - 35764.0586 - - 0s 0 0 35764.7500 0 6 - 35764.7500 - - 0s 0 0 35764.8835 0 6 - 35764.8835 - - 0s 0 0 35764.8835 0 6 - 35764.8835 - - 0s H 0 0 36964.754169 35764.8835 3.25% - 0s 0 2 35765.9491 0 6 36964.7542 35765.9491 3.24% - 0s H 54 36 36182.035913 35807.2334 1.04% 6.2 0s * 58 32 49 36181.393511 35807.2334 1.03% 6.0 0s * 386 64 43 36178.791574 36111.5758 0.19% 9.7 1s * 483 34 39 36175.683193 36131.7246 0.12% 9.3 1s * 486 30 41 36174.601520 36131.7246 0.12% 9.2 1s * 535 7 40 36173.439775 36163.5784 0.03% 9.0 1s Cutting planes: Gomory: 3 Flow cover: 15 Explored 542 nodes (5623 simplex iterations) in 1.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617343977492e+04, best bound 3.617163396164e+04, gap 0.0050%