Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:12:56 2013 Optimize a model with 696 rows, 256 columns and 2176 nonzeros Presolve removed 126 rows and 126 columns Presolve time: 0.00s Presolved: 570 rows, 130 columns, 1840 nonzeros Variable types: 10 continuous, 120 integer (120 binary) Found heuristic solution: objective 3032.0000000 Root relaxation: objective 1.886545e+03, 41 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1886.54545 0 10 3032.00000 1886.54545 37.8% - 0s 0 0 1887.00000 0 12 3032.00000 1887.00000 37.8% - 0s H 0 0 1908.0000000 1887.00000 1.10% - 0s 0 0 1887.00000 0 19 1908.00000 1887.00000 1.10% - 0s H 0 0 1904.0000000 1887.00000 0.89% - 0s 0 0 1887.32535 0 21 1904.00000 1887.32535 0.88% - 0s H 0 0 1895.0000000 1887.32535 0.40% - 0s 0 0 1887.82019 0 24 1895.00000 1887.82019 0.38% - 0s 0 0 1887.82019 0 8 1895.00000 1887.82019 0.38% - 0s 0 0 1888.02370 0 27 1895.00000 1888.02370 0.37% - 0s 0 0 1888.35357 0 19 1895.00000 1888.35357 0.35% - 0s 0 0 1888.85086 0 19 1895.00000 1888.85086 0.32% - 0s 0 0 1889.00571 0 19 1895.00000 1889.00571 0.32% - 0s 0 0 1889.33482 0 23 1895.00000 1889.33482 0.30% - 0s 0 0 1889.42590 0 24 1895.00000 1889.42590 0.29% - 0s 0 0 1889.49507 0 26 1895.00000 1889.49507 0.29% - 0s 0 0 1889.75322 0 26 1895.00000 1889.75322 0.28% - 0s 0 0 1889.77373 0 24 1895.00000 1889.77373 0.28% - 0s 0 0 1889.77781 0 27 1895.00000 1889.77781 0.28% - 0s 0 2 1889.87045 0 27 1895.00000 1889.87045 0.27% - 0s Cutting planes: Gomory: 2 Cover: 6 Implied bound: 5 Clique: 1 MIR: 30 GUB cover: 1 Zero half: 1 Explored 40 nodes (1046 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.895000000000e+03, best bound 1.895000000000e+03, gap 0.0%