Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:51:00 2013 Optimize a model with 1502 rows, 38430 columns and 1916629 nonzeros Presolve removed 54 rows and 328 columns (presolve time = 5s) ... Presolve removed 61 rows and 450 columns Presolve time: 10.06s Presolved: 1441 rows, 37980 columns, 1895622 nonzeros Variable types: 0 continuous, 37980 integer (37980 binary) Found heuristic solution: objective 20629.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8686 1.4755361e+04 4.206105e+02 0.000000e+00 5s 11163 1.4768938e+04 0.000000e+00 0.000000e+00 10s Root relaxation: objective 1.476894e+04, 11163 iterations, 10.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14768.9375 0 200 20629.0000 14768.9375 28.4% - 22s H 0 0 14976.000000 14768.9375 1.38% - 25s 0 0 14775.3333 0 58 14976.0000 14775.3333 1.34% - 30s H 0 0 14946.000000 14775.3333 1.14% - 45s 0 0 14775.3333 0 54 14946.0000 14775.3333 1.14% - 52s 0 0 14775.3333 0 57 14946.0000 14775.3333 1.14% - 54s 0 0 14775.5000 0 54 14946.0000 14775.5000 1.14% - 56s H 0 0 14866.000000 14775.5000 0.61% - 56s 0 0 14775.5000 0 54 14866.0000 14775.5000 0.61% - 58s H 0 0 14856.000000 14775.5000 0.54% - 59s 0 2 14775.8810 0 54 14856.0000 14775.8810 0.54% - 66s H 1 1 14854.000000 14775.8810 0.53% 293 87s 4 3 14775.8810 0 54 14854.0000 14775.8810 0.53% 73.2 95s * 5 4 14 14777.000000 14777.0000 0.0% 58.6 97s Cutting planes: Gomory: 2 Clique: 5 Zero half: 17 Explored 5 nodes (38724 simplex iterations) in 97.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.477700000000e+04, best bound 1.477700000000e+04, gap 0.0%