Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:02:35 2013 Optimize a model with 231 rows, 121 columns and 726 nonzeros Presolve removed 57 rows and 57 columns Presolve time: 0.00s Presolved: 174 rows, 64 columns, 594 nonzeros Variable types: 9 continuous, 55 integer (55 binary) Found heuristic solution: objective 1940.0000000 Found heuristic solution: objective 1794.0000000 Root relaxation: objective 1.261027e+03, 42 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1261.02703 0 7 1794.00000 1261.02703 29.7% - 0s H 0 0 1298.0000000 1261.02703 2.85% - 0s 0 0 1262.00000 0 13 1298.00000 1262.00000 2.77% - 0s H 0 0 1281.0000000 1262.00000 1.48% - 0s 0 0 1262.20390 0 17 1281.00000 1262.20390 1.47% - 0s 0 0 1263.07930 0 19 1281.00000 1263.07930 1.40% - 0s H 0 0 1274.0000000 1263.07930 0.86% - 0s H 0 0 1267.0000000 1263.07930 0.31% - 0s 0 0 1263.44391 0 19 1267.00000 1263.44391 0.28% - 0s 0 0 1263.44391 0 7 1267.00000 1263.44391 0.28% - 0s 0 0 1263.44391 0 16 1267.00000 1263.44391 0.28% - 0s 0 0 1263.61908 0 16 1267.00000 1263.61908 0.27% - 0s 0 0 1265.62081 0 17 1267.00000 1265.62081 0.11% - 0s 0 0 1265.78058 0 17 1267.00000 1265.78058 0.10% - 0s 0 0 cutoff 0 1267.00000 1266.00127 0.08% - 0s Cutting planes: Cover: 2 Implied bound: 2 Clique: 1 MIR: 14 Mod-K: 1 Explored 0 nodes (218 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.267000000000e+03, best bound 1.267000000000e+03, gap 0.0%