Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:34:26 2013 Optimize a model with 6579 rows, 1156 columns and 20230 nonzeros Presolve removed 984 rows and 592 columns Presolve time: 0.04s Presolved: 5595 rows, 564 columns, 17281 nonzeros Variable types: 16 continuous, 548 integer (548 binary) Found heuristic solution: objective 24770.000000 Root relaxation: objective 1.797569e+04, 3125 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17975.6944 0 11 24770.0000 17975.6944 27.4% - 0s H 0 0 18001.000000 17975.6944 0.14% - 0s H 0 0 17989.000000 17975.6944 0.07% - 0s 0 0 17977.4600 0 21 17989.0000 17977.4600 0.06% - 0s 0 0 17977.4600 0 10 17989.0000 17977.4600 0.06% - 0s 0 0 17977.5832 0 24 17989.0000 17977.5832 0.06% - 0s 0 0 17978.5545 0 30 17989.0000 17978.5545 0.06% - 0s 0 0 17979.0854 0 29 17989.0000 17979.0854 0.06% - 0s 0 0 17979.7939 0 35 17989.0000 17979.7939 0.05% - 0s 0 0 17979.9126 0 32 17989.0000 17979.9126 0.05% - 0s 0 0 17980.0950 0 34 17989.0000 17980.0950 0.05% - 0s 0 0 17980.3009 0 34 17989.0000 17980.3009 0.05% - 0s 0 0 17980.3262 0 35 17989.0000 17980.3262 0.05% - 0s 0 0 17980.3604 0 34 17989.0000 17980.3604 0.05% - 0s 0 0 17980.3997 0 35 17989.0000 17980.3997 0.05% - 0s 0 0 17980.3997 0 35 17989.0000 17980.3997 0.05% - 0s H 0 0 17987.000000 17980.3997 0.04% - 0s 0 2 17980.6801 0 35 17987.0000 17980.6801 0.04% - 0s * 14 8 12 17986.000000 17981.2201 0.03% 8.4 0s * 80 7 9 17984.000000 17982.2874 0.01% 7.3 0s Cutting planes: Gomory: 1 MIR: 25 Mod-K: 1 Explored 81 nodes (4045 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.798400000000e+04, best bound 1.798300000000e+04, gap 0.0056%