Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:32:45 2012 Optimize a model with 21090 rows, 5550 columns and 68524 nonzeros Presolve time: 0.16s Presolved: 21090 rows, 5550 columns, 68574 nonzeros Variable types: 0 continuous, 5550 integer (5550 binary) Found heuristic solution: objective 50.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 15649 1.9182677e+00 1.823007e+03 0.000000e+00 5s 21112 2.0000000e+00 0.000000e+00 0.000000e+00 9s Root relaxation: objective 2.000000e+00, 21112 iterations, 8.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 50.00000 2.00000 96.0% - 8s H 0 0 11.0000000 2.00000 81.8% - 8s H 0 0 6.0000000 2.00000 66.7% - 11s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 11s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 12s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 12s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 13s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 13s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 13s 0 2 2.00000 0 148 6.00000 2.00000 66.7% - 14s 1 3 3.00000 1 584 6.00000 2.00000 66.7% 16611 22s 2 4 3.00000 1 577 6.00000 3.00000 50.0% 17106 30s 8 8 3.00000 5 142 6.00000 3.00000 50.0% 6328 37s 9 9 3.25000 6 592 6.00000 3.00000 50.0% 6950 41s 18 16 5.00000 13 287 6.00000 3.00000 50.0% 4215 45s H 27 21 5.0000000 3.00000 40.0% 2913 46s 34 20 4.00000 4 263 5.00000 3.00000 40.0% 2890 50s 54 36 4.00000 18 86 5.00000 3.00000 40.0% 2170 56s * 62 11 22 4.0000000 3.00000 25.0% 1892 56s 66 6 cutoff 6 4.00000 3.00000 25.0% 2055 60s 69 3 cutoff 4 4.00000 3.00000 25.0% 2306 66s 72 4 cutoff 5 4.00000 3.00000 25.0% 2461 70s 74 2 cutoff 4 4.00000 3.00000 25.0% 2845 79s 75 1 cutoff 6 4.00000 3.00000 25.0% 3264 92s 77 1 cutoff 7 4.00000 3.00000 25.0% 3441 97s 78 0 cutoff 7 4.00000 4.00000 0.0% 3652 102s Cutting planes: Clique: 17 Explored 79 nodes (306605 simplex iterations) in 102.78 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%