Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:04:11 2012 Optimize a model with 1762 rows, 1681 columns and 10136 nonzeros Presolve removed 869 rows and 968 columns Presolve time: 0.05s Presolved: 893 rows, 713 columns, 9609 nonzeros Variable types: 38 continuous, 675 integer (675 binary) Root relaxation: objective 4.342477e+02, 140 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 434.24769 0 25 - 434.24769 - - 0s 0 0 435.00000 0 23 - 435.00000 - - 0s 0 0 435.00000 0 23 - 435.00000 - - 0s 0 2 435.00000 0 23 - 435.00000 - - 0s * 25 19 18 471.0000000 435.82643 7.47% 8.1 0s * 82 35 25 468.0000000 436.68750 6.69% 8.3 0s H 111 40 465.0000000 436.98696 6.02% 8.6 0s H 219 49 463.0000000 438.25263 5.35% 9.0 0s * 229 48 20 462.0000000 438.25263 5.14% 8.9 0s * 246 53 13 461.0000000 438.57313 4.86% 9.2 0s Cutting planes: Learned: 1 Gomory: 3 Cover: 33 MIR: 7 GUB cover: 2 Explored 455 nodes (5027 simplex iterations) in 0.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.610000000000e+02, best bound 4.610000000000e+02, gap 0.0%