Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:11:03 2013 Optimize a model with 469 rows, 196 columns and 1470 nonzeros Presolve removed 123 rows and 101 columns Presolve time: 0.00s Presolved: 346 rows, 95 columns, 1104 nonzeros Variable types: 6 continuous, 89 integer (89 binary) Found heuristic solution: objective 3848.0000000 Found heuristic solution: objective 3435.0000000 Root relaxation: objective 2.794674e+03, 25 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2794.67442 0 7 3435.00000 2794.67442 18.6% - 0s H 0 0 2831.0000000 2794.67442 1.28% - 0s 0 0 2797.06716 0 20 2831.00000 2797.06716 1.20% - 0s H 0 0 2815.0000000 2797.06716 0.64% - 0s H 0 0 2813.0000000 2797.06716 0.57% - 0s 0 0 2800.35790 0 16 2813.00000 2800.35790 0.45% - 0s 0 0 2800.35790 0 8 2813.00000 2800.35790 0.45% - 0s 0 0 2800.46009 0 17 2813.00000 2800.46009 0.45% - 0s 0 0 2800.91304 0 14 2813.00000 2800.91304 0.43% - 0s 0 2 2803.43615 0 14 2813.00000 2803.43615 0.34% - 0s Cutting planes: Gomory: 4 Cover: 1 Implied bound: 4 MIR: 3 Zero half: 3 Explored 5 nodes (234 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.813000000000e+03, best bound 2.813000000000e+03, gap 0.0%