Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:19:35 2013 Optimize a model with 1350 rows, 400 columns and 4200 nonzeros Presolve removed 333 rows and 210 columns Presolve time: 0.01s Presolved: 1017 rows, 190 columns, 3187 nonzeros Variable types: 8 continuous, 182 integer (182 binary) Found heuristic solution: objective 8837.0000000 Found heuristic solution: objective 8239.0000000 Root relaxation: objective 7.426638e+03, 690 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 7426.63754 0 6 8239.00000 7426.63754 9.86% - 0s H 0 0 7439.0000000 7426.63754 0.17% - 0s H 0 0 7433.0000000 7426.63754 0.09% - 0s 0 0 7430.00296 0 14 7433.00000 7430.00296 0.04% - 0s 0 0 7430.00296 0 6 7433.00000 7430.00296 0.04% - 0s 0 0 7430.87865 0 10 7433.00000 7430.87865 0.03% - 0s 0 1 7431.50000 0 10 7433.00000 7431.50000 0.02% - 0s Cutting planes: Gomory: 1 Cover: 3 Implied bound: 1 MIR: 3 Explored 1 nodes (759 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.433000000000e+03, best bound 7.433000000000e+03, gap 0.0%