Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:48 2013 Optimize a model with 1140 rows, 4020 columns and 10010 nonzeros Presolve removed 20 rows and 30 columns Presolve time: 0.10s Presolved: 1120 rows, 3990 columns, 7980 nonzeros Variable types: 3000 continuous, 990 integer (990 binary) Root relaxation: objective 1.791602e+04, 120 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17916.0191 0 3 - 17916.0191 - - 0s 0 0 17919.1794 0 4 - 17919.1794 - - 0s 0 0 17919.3210 0 4 - 17919.3210 - - 0s 0 0 17919.3210 0 4 - 17919.3210 - - 0s H 0 0 18637.902719 17919.3210 3.86% - 0s 0 2 17920.6610 0 4 18637.9027 17920.6610 3.85% - 0s H 27 27 18026.835998 17964.7214 0.34% 1.2 0s H 54 54 18022.390742 17965.4791 0.32% 2.0 0s H 81 67 18021.665809 17965.8281 0.31% 2.2 0s H 189 151 18016.075460 17966.6104 0.27% 2.7 0s H 297 232 18014.546078 17967.1298 0.26% 2.7 0s H 324 172 17999.321628 17967.2612 0.18% 2.7 0s * 344 137 27 17990.410891 17967.8248 0.13% 2.7 0s H 511 169 17985.812005 17972.1695 0.08% 2.9 0s * 595 150 19 17985.488782 17977.2527 0.05% 2.9 0s * 604 131 26 17984.233688 17977.2527 0.04% 2.9 0s * 605 128 26 17984.221875 17977.2527 0.04% 2.9 0s Cutting planes: Gomory: 3 Flow cover: 4 Explored 746 nodes (2622 simplex iterations) in 0.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.798422187500e+04, best bound 1.798243181675e+04, gap 0.0100%