current bounds on the number of colors: 0 -- 42 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:20 2012 Optimize a model with 9261 rows, 1321 columns and 28539 nonzeros Presolve time: 0.03s Presolved: 9261 rows, 1321 columns, 28539 nonzeros Variable types: 0 continuous, 1321 integer (1321 binary) Root relaxation: objective 0.000000e+00, 106 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 (284 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 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:20 2012 Optimize a model with 4432 rows, 859 columns and 13590 nonzeros Presolve time: 0.01s Presolved: 4432 rows, 859 columns, 13590 nonzeros Variable types: 0 continuous, 859 integer (859 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 42 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (643 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:20 2012 Optimize a model with 2237 rows, 649 columns and 6795 nonzeros Presolve time: 0.01s Presolved: 2237 rows, 649 columns, 6795 nonzeros Variable types: 0 continuous, 649 integer (649 binary) Root relaxation: objective 0.000000e+00, 85 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 54 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1738 simplex iterations) in 0.15 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:20 2012 Optimize a model with 3115 rows, 733 columns and 9513 nonzeros Presolve time: 0.01s Presolved: 3115 rows, 733 columns, 9513 nonzeros Variable types: 0 continuous, 733 integer (733 binary) Root relaxation: objective 0.000000e+00, 85 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 44 - 0.00000 - - 0s 0 0 0.00000 0 32 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 171 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 1s 0 0 0.00000 0 162 - 0.00000 - - 1s 0 0 0.00000 0 153 - 0.00000 - - 2s 0 0 0.00000 0 163 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 0 0.00000 0 165 - 0.00000 - - 3s 0 0 0.00000 0 165 - 0.00000 - - 3s 0 2 0.00000 0 164 - 0.00000 - - 3s Cutting planes: Clique: 95 Zero half: 2 Explored 7 nodes (26993 simplex iterations) in 3.76 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:24 2012 Optimize a model with 3554 rows, 775 columns and 10872 nonzeros Presolve time: 0.01s Presolved: 3554 rows, 775 columns, 10872 nonzeros Variable types: 0 continuous, 775 integer (775 binary) Root relaxation: objective 0.000000e+00, 84 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 40 - 0.00000 - - 0s 0 0 0.00000 0 100 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 0.00000 0 41 - 0.00000 - - 0s 0 0 0.00000 0 113 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 1s 0 0 0.00000 0 134 - 0.00000 - - 1s 0 0 0.00000 0 162 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 1s 0 2 0.00000 0 144 - 0.00000 - - 1s Cutting planes: Clique: 50 Zero half: 8 Explored 185 nodes (30608 simplex iterations) in 2.63 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: 8 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:27 2012 Optimize a model with 3993 rows, 817 columns and 12231 nonzeros Presolve time: 0.01s Presolved: 3993 rows, 817 columns, 12231 nonzeros Variable types: 0 continuous, 817 integer (817 binary) Root relaxation: objective 0.000000e+00, 86 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (898 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% optimal solution found: number of colors: 9