Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:19 2012 Optimize a model with 1445 rows, 77 columns and 2890 nonzeros Presolve removed 1008 rows and 0 columns Presolve time: 0.03s Presolved: 437 rows, 77 columns, 2710 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.206939e+01, 256 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.06939 0 75 6.00000 12.06939 101% - 0s H 0 0 7.0000000 12.06939 72.4% - 0s H 0 0 8.0000000 12.06939 50.9% - 0s 0 0 11.87366 0 75 8.00000 11.87366 48.4% - 0s 0 0 11.78338 0 75 8.00000 11.78338 47.3% - 0s H 0 0 9.0000000 11.78338 30.9% - 0s 0 0 11.75324 0 75 9.00000 11.75324 30.6% - 0s 0 0 11.73977 0 75 9.00000 11.73977 30.4% - 0s 0 0 11.73820 0 75 9.00000 11.73820 30.4% - 0s 0 2 11.73722 0 75 9.00000 11.73722 30.4% - 0s * 14 3 1 10.0000000 11.52731 15.3% 57.0 0s Cutting planes: Clique: 21 Zero half: 10 Explored 18 nodes (1365 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%