current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:58 2012 Optimize a model with 12559 rows, 1625 columns and 38617 nonzeros Presolve time: 0.05s Presolved: 12559 rows, 1625 columns, 38617 nonzeros Variable types: 0 continuous, 1625 integer (1625 binary) Root relaxation: objective 0.000000e+00, 110 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 (307 simplex iterations) in 0.08 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 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:58 2012 Optimize a model with 6031 rows, 1061 columns and 18469 nonzeros Presolve time: 0.02s Presolved: 6031 rows, 1061 columns, 18469 nonzeros Variable types: 0 continuous, 1061 integer (1061 binary) Root relaxation: objective 0.000000e+00, 109 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 (942 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:58 2012 Optimize a model with 2767 rows, 779 columns and 8395 nonzeros Presolve time: 0.01s Presolved: 2767 rows, 779 columns, 8395 nonzeros Variable types: 0 continuous, 779 integer (779 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 62 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2456 simplex iterations) in 0.22 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 18:07:59 2012 Optimize a model with 4399 rows, 920 columns and 13432 nonzeros Presolve time: 0.01s Presolved: 4399 rows, 920 columns, 13432 nonzeros Variable types: 0 continuous, 920 integer (920 binary) Root relaxation: objective 0.000000e+00, 94 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 72 - 0.00000 - - 0s 0 0 0.00000 0 155 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 1s 0 0 0.00000 0 162 - 0.00000 - - 1s 0 0 0.00000 0 174 - 0.00000 - - 2s 0 0 0.00000 0 183 - 0.00000 - - 2s 0 0 0.00000 0 177 - 0.00000 - - 2s 0 2 0.00000 0 177 - 0.00000 - - 3s Cutting planes: Clique: 65 Zero half: 6 Explored 15 nodes (26000 simplex iterations) in 3.62 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:02 2012 Optimize a model with 4943 rows, 967 columns and 15111 nonzeros Presolve time: 0.01s Presolved: 4943 rows, 967 columns, 15111 nonzeros Variable types: 0 continuous, 967 integer (967 binary) Root relaxation: objective 0.000000e+00, 110 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 34 - 0.00000 - - 0s 0 0 0.00000 0 32 - 0.00000 - - 0s Cutting planes: Clique: 6 Explored 0 nodes (1916 simplex iterations) in 0.15 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