Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:02:35 2013 Optimize a model with 231 rows, 121 columns and 726 nonzeros Presolve removed 114 rows and 69 columns Presolve time: 0.00s Presolved: 117 rows, 52 columns, 375 nonzeros Variable types: 3 continuous, 49 integer (49 binary) Found heuristic solution: objective 2635.0000000 Root relaxation: objective 2.447500e+03, 4 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2447.50000 0 4 2635.00000 2447.50000 7.12% - 0s H 0 0 2459.0000000 2447.50000 0.47% - 0s 0 0 2453.14644 0 6 2459.00000 2453.14644 0.24% - 0s 0 0 2453.14644 0 4 2459.00000 2453.14644 0.24% - 0s 0 0 cutoff 0 2459.00000 2458.00246 0.04% - 0s Cutting planes: Gomory: 1 Implied bound: 1 MIR: 3 Explored 0 nodes (40 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.459000000000e+03, best bound 2.459000000000e+03, gap 0.0%