Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:00:46 2013 Optimize a model with 41 rows, 36 columns and 126 nonzeros Presolve removed 28 rows and 21 columns Presolve time: 0.00s Presolved: 13 rows, 15 columns, 48 nonzeros Variable types: 3 continuous, 12 integer (12 binary) Found heuristic solution: objective 548.0000000 Root relaxation: objective 5.289800e+02, 4 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 528.98000 0 3 548.00000 528.98000 3.47% - 0s 0 0 536.75000 0 6 548.00000 536.75000 2.05% - 0s 0 0 540.50000 0 6 548.00000 540.50000 1.37% - 0s * 0 0 0 541.0000000 541.00000 0.0% - 0s Cutting planes: Implied bound: 1 Clique: 1 MIR: 2 Explored 0 nodes (11 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.410000000000e+02, best bound 5.410000000000e+02, gap 0.0%