Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:47 2013 Optimize a model with 660 rows, 2030 columns and 5550 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.05s Presolved: 650 rows, 2020 columns, 5040 nonzeros Variable types: 1520 continuous, 500 integer (500 binary) Root relaxation: objective 1.836170e+04, 136 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18361.7044 0 2 - 18361.7044 - - 0s H 0 0 18466.379364 18361.7044 0.57% - 0s 0 0 18372.1659 0 4 18466.3794 18372.1659 0.51% - 0s 0 0 18379.2125 0 8 18466.3794 18379.2125 0.47% - 0s 0 0 18384.3801 0 5 18466.3794 18384.3801 0.44% - 0s 0 0 18385.0304 0 4 18466.3794 18385.0304 0.44% - 0s 0 0 18387.1714 0 9 18466.3794 18387.1714 0.43% - 0s 0 0 18387.9174 0 10 18466.3794 18387.9174 0.42% - 0s 0 0 18388.8396 0 7 18466.3794 18388.8396 0.42% - 0s 0 0 18389.0533 0 4 18466.3794 18389.0533 0.42% - 0s 0 0 18389.0995 0 7 18466.3794 18389.0995 0.42% - 0s 0 0 18389.1809 0 6 18466.3794 18389.1809 0.42% - 0s 0 0 18389.2020 0 6 18466.3794 18389.2020 0.42% - 0s 0 0 18389.8437 0 4 18466.3794 18389.8437 0.41% - 0s 0 0 18390.3589 0 9 18466.3794 18390.3589 0.41% - 0s 0 0 18390.8574 0 4 18466.3794 18390.8574 0.41% - 0s 0 0 18391.4986 0 2 18466.3794 18391.4986 0.41% - 0s 0 0 18391.4986 0 2 18466.3794 18391.4986 0.41% - 0s 0 2 18391.4986 0 2 18466.3794 18391.4986 0.41% - 0s H 27 0 18426.564014 18414.0944 0.07% 6.4 0s * 74 3 68 18418.241613 18418.2416 0.0% 5.4 0s Cutting planes: Gomory: 2 Implied bound: 22 Flow cover: 2 Explored 75 nodes (783 simplex iterations) in 0.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.841824161337e+04, best bound 1.841824161337e+04, gap 0.0%