Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:10:21 2013 Optimize a model with 377 rows, 169 columns and 1183 nonzeros Presolve removed 113 rows and 85 columns Presolve time: 0.00s Presolved: 264 rows, 84 columns, 882 nonzeros Variable types: 9 continuous, 75 integer (75 binary) Found heuristic solution: objective 1873.0000000 Root relaxation: objective 1.533893e+03, 33 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1533.89286 0 7 1873.00000 1533.89286 18.1% - 0s H 0 0 1552.0000000 1533.89286 1.17% - 0s H 0 0 1545.0000000 1533.89286 0.72% - 0s 0 0 1536.10471 0 15 1545.00000 1536.10471 0.58% - 0s 0 0 1536.10471 0 6 1545.00000 1536.10471 0.58% - 0s 0 0 1536.27107 0 17 1545.00000 1536.27107 0.56% - 0s 0 0 1537.35199 0 17 1545.00000 1537.35199 0.50% - 0s 0 0 1537.74971 0 19 1545.00000 1537.74971 0.47% - 0s 0 0 1539.21126 0 21 1545.00000 1539.21126 0.37% - 0s 0 0 1539.50148 0 21 1545.00000 1539.50148 0.36% - 0s H 0 0 1544.0000000 1539.50148 0.29% - 0s 0 0 1539.61863 0 21 1544.00000 1539.61863 0.28% - 0s 0 0 1539.64105 0 20 1544.00000 1539.64105 0.28% - 0s 0 0 1539.79007 0 20 1544.00000 1539.79007 0.27% - 0s 0 0 1539.97720 0 21 1544.00000 1539.97720 0.26% - 0s 0 0 1539.97720 0 21 1544.00000 1539.97720 0.26% - 0s 0 0 1540.81570 0 17 1544.00000 1540.81570 0.21% - 0s 0 0 1540.81570 0 16 1544.00000 1540.81570 0.21% - 0s 0 2 1540.85714 0 16 1544.00000 1540.85714 0.20% - 0s Cutting planes: Gomory: 1 Cover: 3 MIR: 18 GUB cover: 1 Explored 12 nodes (306 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.544000000000e+03, best bound 1.544000000000e+03, gap 0.0%