Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:24 2013 Optimize a model with 2028 rows, 2044 columns and 8082 nonzeros Presolve removed 1908 rows and 1908 columns Presolve time: 0.07s Presolved: 120 rows, 136 columns, 386 nonzeros Variable types: 79 continuous, 57 integer (57 binary) Root relaxation: objective 4.810927e+03, 60 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4810.92679 0 2 - 4810.92679 - - 0s 0 0 4828.99339 0 2 - 4828.99339 - - 0s 0 0 4830.17214 0 6 - 4830.17214 - - 0s 0 0 4831.11353 0 4 - 4831.11353 - - 0s H 0 0 4831.1210937 4831.11353 0.00% - 0s Cutting planes: Gomory: 2 Cover: 1 Flow cover: 2 Explored 0 nodes (157 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.831121093651e+03, best bound 4.831113533073e+03, gap 0.0002%