Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:59:28 2012 Optimize a model with 18147 rows, 4830 columns and 58995 nonzeros Presolve time: 0.14s Presolved: 18147 rows, 4830 columns, 59125 nonzeros Variable types: 0 continuous, 4830 integer (4830 binary) Found heuristic solution: objective 43.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 16378 1.9647076e+00 5.637303e+02 0.000000e+00 5s 19278 2.0000000e+00 0.000000e+00 0.000000e+00 6s Root relaxation: objective 2.000000e+00, 19278 iterations, 6.49 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 138 43.00000 2.00000 95.3% - 6s H 0 0 13.0000000 2.00000 84.6% - 6s H 0 0 5.0000000 2.00000 60.0% - 8s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 10s 0 2 2.00000 0 138 5.00000 2.00000 60.0% - 11s 1 3 3.00000 1 435 5.00000 2.00831 59.8% 23369 20s 2 4 3.00000 1 760 5.00000 3.00000 40.0% 22772 29s 4 4 3.00000 2 246 5.00000 3.00000 40.0% 11870 30s 27 21 4.00000 19 110 5.00000 3.00000 40.0% 2410 35s 54 27 4.00000 11 138 5.00000 3.00000 40.0% 1510 41s H 55 4 4.0000000 3.00000 25.0% 1482 41s Cutting planes: Clique: 11 Explored 60 nodes (101847 simplex iterations) in 41.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%