current bounds on the number of colors: 0 -- 44 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:39 2012 Optimize a model with 10340 rows, 1436 columns and 31856 nonzeros Presolve time: 0.04s Presolved: 10340 rows, 1436 columns, 31856 nonzeros Variable types: 0 continuous, 1436 integer (1436 binary) Root relaxation: objective 0.000000e+00, 93 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 (224 simplex iterations) in 0.06 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 -- 22 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:39 2012 Optimize a model with 5192 rows, 952 columns and 15928 nonzeros Presolve time: 0.01s Presolved: 5192 rows, 952 columns, 15928 nonzeros Variable types: 0 continuous, 952 integer (952 binary) Root relaxation: objective 0.000000e+00, 91 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 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (875 simplex iterations) in 0.06 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:40 2012 Optimize a model with 2384 rows, 688 columns and 7240 nonzeros Presolve time: 0.01s Presolved: 2384 rows, 688 columns, 7240 nonzeros Variable types: 0 continuous, 688 integer (688 binary) Root relaxation: objective 0.000000e+00, 90 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 62 - 0.00000 - - 0s 0 0 0.00000 0 86 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1583 simplex iterations) in 0.14 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: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:40 2012 Optimize a model with 3788 rows, 820 columns and 11584 nonzeros Presolve time: 0.01s Presolved: 3788 rows, 820 columns, 11584 nonzeros Variable types: 0 continuous, 820 integer (820 binary) Root relaxation: objective 0.000000e+00, 88 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 36 - 0.00000 - - 0s 0 0 0.00000 0 37 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 59 - 0.00000 - - 1s 0 0 0.00000 0 135 - 0.00000 - - 1s 0 0 0.00000 0 24 - 0.00000 - - 1s 0 0 0.00000 0 86 - 0.00000 - - 1s 0 0 0.00000 0 60 - 0.00000 - - 2s 0 2 0.00000 0 60 - 0.00000 - - 2s * 149 3 15 0.0000000 0.00000 0.0% 62.9 3s Cutting planes: Gomory: 1 Clique: 27 Zero half: 4 Explored 150 nodes (28455 simplex iterations) in 3.22 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: 5 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:43 2012 Optimize a model with 2852 rows, 732 columns and 8688 nonzeros Presolve time: 0.01s Presolved: 2852 rows, 732 columns, 8688 nonzeros Variable types: 0 continuous, 732 integer (732 binary) Root relaxation: objective 0.000000e+00, 93 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 58 - 0.00000 - - 0s 0 0 0.00000 0 67 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1972 simplex iterations) in 0.18 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:43 2012 Optimize a model with 3320 rows, 776 columns and 10136 nonzeros Presolve time: 0.01s Presolved: 3320 rows, 776 columns, 10136 nonzeros Variable types: 0 continuous, 776 integer (776 binary) Root relaxation: objective 0.000000e+00, 88 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 50 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 187 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 183 - 0.00000 - - 1s 0 0 0.00000 0 198 - 0.00000 - - 2s 0 0 0.00000 0 200 - 0.00000 - - 2s 0 0 0.00000 0 183 - 0.00000 - - 2s 0 0 0.00000 0 206 - 0.00000 - - 2s 0 0 0.00000 0 206 - 0.00000 - - 2s 0 2 0.00000 0 206 - 0.00000 - - 3s Cutting planes: Clique: 68 Zero half: 8 Explored 23 nodes (27621 simplex iterations) in 3.68 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 8