Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:17 2013 Optimize a model with 228 rows, 644 columns and 1682 nonzeros Presolve removed 210 rows and 585 columns Presolve time: 0.01s Presolved: 18 rows, 59 columns, 118 nonzeros Variable types: 47 continuous, 12 integer (12 binary) Root relaxation: objective 7.444602e+03, 6 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 7444.60178 0 1 - 7444.60178 - - 0s H 0 0 7459.1516945 7444.60178 0.20% - 0s 0 0 7459.14830 0 2 7459.15169 7459.14830 0.00% - 0s Cutting planes: Cover: 1 Flow cover: 1 Explored 0 nodes (12 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.459151694456e+03, best bound 7.459148295577e+03, gap 0.0000%