current bounds on the number of colors: 0 -- 39 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:35 2012 Optimize a model with 7297 rows, 1123 columns and 22515 nonzeros Presolve time: 0.02s Presolved: 7297 rows, 1123 columns, 22515 nonzeros Variable types: 0 continuous, 1123 integer (1123 binary) Root relaxation: objective 0.000000e+00, 85 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 (344 simplex iterations) in 0.05 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:35 2012 Optimize a model with 3477 rows, 733 columns and 10665 nonzeros Presolve time: 0.01s Presolved: 3477 rows, 733 columns, 10665 nonzeros Variable types: 0 continuous, 733 integer (733 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 34 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (552 simplex iterations) in 0.04 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:36 2012 Optimize a model with 1567 rows, 538 columns and 4740 nonzeros Presolve time: 0.00s Presolved: 1567 rows, 538 columns, 4740 nonzeros Variable types: 0 continuous, 538 integer (538 binary) Root relaxation: objective 0.000000e+00, 79 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 68 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1832 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:36 2012 Optimize a model with 2331 rows, 616 columns and 7110 nonzeros Presolve time: 0.01s Presolved: 2331 rows, 616 columns, 7110 nonzeros Variable types: 0 continuous, 616 integer (616 binary) Root relaxation: objective 0.000000e+00, 78 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 36 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1694 simplex iterations) in 0.13 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:36 2012 Optimize a model with 2713 rows, 655 columns and 8295 nonzeros Presolve time: 0.01s Presolved: 2713 rows, 655 columns, 8295 nonzeros Variable types: 0 continuous, 655 integer (655 binary) Root relaxation: objective 0.000000e+00, 80 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 40 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 2 0.00000 0 186 - 0.00000 - - 1s Cutting planes: Clique: 35 Zero half: 3 Explored 9 nodes (13123 simplex iterations) in 1.65 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:38 2012 Optimize a model with 3095 rows, 694 columns and 9480 nonzeros Presolve time: 0.01s Presolved: 3095 rows, 694 columns, 9480 nonzeros Variable types: 0 continuous, 694 integer (694 binary) Root relaxation: objective 0.000000e+00, 81 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 43 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 106 - 0.00000 - - 0s 0 0 0.00000 0 124 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 97 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 0s 0 0 0.00000 0 109 - 0.00000 - - 1s 0 0 0.00000 0 79 - 0.00000 - - 1s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 2 0.00000 0 122 - 0.00000 - - 2s * 74 1 8 0.0000000 0.00000 0.0% 73.4 2s Cutting planes: Clique: 44 Zero half: 1 Explored 75 nodes (22220 simplex iterations) in 2.61 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% optimal solution found: number of colors: 8