current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:40 2012 Optimize a model with 13560 rows, 1715 columns and 41688 nonzeros Presolve time: 0.05s Presolved: 13560 rows, 1715 columns, 41688 nonzeros Variable types: 0 continuous, 1715 integer (1715 binary) Root relaxation: objective 0.000000e+00, 108 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (387 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:41 2012 Optimize a model with 6804 rows, 1139 columns and 20844 nonzeros Presolve time: 0.02s Presolved: 6804 rows, 1139 columns, 20844 nonzeros Variable types: 0 continuous, 1139 integer (1139 binary) Root relaxation: objective 0.000000e+00, 104 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 23 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (771 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:41 2012 Optimize a model with 3426 rows, 851 columns and 10422 nonzeros Presolve time: 0.01s Presolved: 3426 rows, 851 columns, 10422 nonzeros Variable types: 0 continuous, 851 integer (851 binary) Root relaxation: objective 0.000000e+00, 96 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2244 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:41 2012 Optimize a model with 5115 rows, 995 columns and 15633 nonzeros Presolve time: 0.01s Presolved: 5115 rows, 995 columns, 15633 nonzeros Variable types: 0 continuous, 995 integer (995 binary) Root relaxation: objective 0.000000e+00, 104 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 0.00000 0 84 - 0.00000 - - 0s 0 0 0.00000 0 77 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 31 Zero half: 49 Explored 0 nodes (8244 simplex iterations) in 0.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:42 2012 Optimize a model with 3989 rows, 899 columns and 12159 nonzeros Presolve time: 0.01s Presolved: 3989 rows, 899 columns, 12159 nonzeros Variable types: 0 continuous, 899 integer (899 binary) Root relaxation: objective 0.000000e+00, 100 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Clique: 65 Zero half: 74 Explored 0 nodes (6064 simplex iterations) in 0.99 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:43 2012 Optimize a model with 4552 rows, 947 columns and 13896 nonzeros Presolve time: 0.01s Presolved: 4552 rows, 947 columns, 13896 nonzeros Variable types: 0 continuous, 947 integer (947 binary) Root relaxation: objective 0.000000e+00, 96 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 197 - 0.00000 - - 2s 0 0 0.00000 0 207 - 0.00000 - - 2s 0 0 0.00000 0 160 - 0.00000 - - 2s 0 2 0.00000 0 139 - 0.00000 - - 3s Cutting planes: Clique: 85 Zero half: 4 Explored 47 nodes (29092 simplex iterations) in 4.13 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9