Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:12:55 2013 Optimize a model with 696 rows, 256 columns and 2176 nonzeros Presolve removed 265 rows and 143 columns Presolve time: 0.00s Presolved: 431 rows, 113 columns, 1368 nonzeros Variable types: 6 continuous, 107 integer (107 binary) Found heuristic solution: objective 4799.0000000 Root relaxation: objective 3.891070e+03, 9 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3891.06977 0 4 4799.00000 3891.06977 18.9% - 0s 0 0 3892.45307 0 11 4799.00000 3892.45307 18.9% - 0s H 0 0 3912.0000000 3892.45307 0.50% - 0s H 0 0 3905.0000000 3892.45307 0.32% - 0s H 0 0 3899.0000000 3892.45307 0.17% - 0s 0 0 3894.44368 0 16 3899.00000 3894.44368 0.12% - 0s 0 0 3894.44368 0 4 3899.00000 3894.44368 0.12% - 0s H 0 0 3898.0000000 3894.44368 0.09% - 0s 0 0 3895.13919 0 10 3898.00000 3895.13919 0.07% - 0s 0 1 3895.16308 0 10 3898.00000 3895.16308 0.07% - 0s Cutting planes: Cover: 2 Implied bound: 4 MIR: 3 Explored 1 nodes (83 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.898000000000e+03, best bound 3.898000000000e+03, gap 0.0%