Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:15 2013 Optimize a model with 84 rows, 64 columns and 224 nonzeros Presolve removed 28 rows and 28 columns Presolve time: 0.00s Presolved: 56 rows, 36 columns, 168 nonzeros Variable types: 8 continuous, 28 integer (28 binary) Found heuristic solution: objective 1670.0000000 Root relaxation: objective 5.300000e+02, 18 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 530.00000 0 12 1670.00000 530.00000 68.3% - 0s 0 0 677.41205 0 10 1670.00000 677.41205 59.4% - 0s 0 0 677.41205 0 10 1670.00000 677.41205 59.4% - 0s 0 2 687.09661 0 10 1670.00000 687.09661 58.9% - 0s * 11 11 8 1019.0000000 729.76819 28.4% 5.3 0s * 13 11 9 1011.0000000 729.76819 27.8% 4.8 0s Cutting planes: Implied bound: 9 MIR: 13 Explored 161 nodes (464 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.011000000000e+03, best bound 1.011000000000e+03, gap 0.0%