Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:48 2013 Optimize a model with 260 rows, 1590 columns and 6220 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.01s Presolved: 250 rows, 1580 columns, 5710 nonzeros Variable types: 1520 continuous, 60 integer (60 binary) Root relaxation: objective 1.937272e+04, 114 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19372.7157 0 6 - 19372.7157 - - 0s 0 0 19374.8163 0 8 - 19374.8163 - - 0s 0 0 19445.2019 0 7 - 19445.2019 - - 0s 0 0 19445.2019 0 7 - 19445.2019 - - 0s H 0 0 19606.617690 19445.2019 0.82% - 0s 0 2 19482.1284 0 7 19606.6177 19482.1284 0.63% - 0s * 12 9 10 19529.061833 19482.1284 0.24% 8.7 0s * 25 12 10 19518.532090 19511.7016 0.03% 5.8 0s H 28 5 19515.429393 19511.7016 0.02% 5.4 0s * 43 4 10 19513.720614 19513.0439 0.00% 4.3 0s Cutting planes: Gomory: 1 Flow cover: 1 Explored 44 nodes (467 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.951372061361e+04, best bound 1.951304386091e+04, gap 0.0035%