current bounds on the number of colors: 0 -- 46 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:10 2012 Optimize a model with 12052 rows, 1580 columns and 37076 nonzeros Presolve time: 0.04s Presolved: 12052 rows, 1580 columns, 37076 nonzeros Variable types: 0 continuous, 1580 integer (1580 binary) Root relaxation: objective 0.000000e+00, 102 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 (415 simplex iterations) in 0.09 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 18:06:10 2012 Optimize a model with 5788 rows, 1028 columns and 17732 nonzeros Presolve time: 0.02s Presolved: 5788 rows, 1028 columns, 17732 nonzeros Variable types: 0 continuous, 1028 integer (1028 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (428 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:11 2012 Optimize a model with 2656 rows, 752 columns and 8060 nonzeros Presolve time: 0.01s Presolved: 2656 rows, 752 columns, 8060 nonzeros Variable types: 0 continuous, 752 integer (752 binary) Root relaxation: objective 0.000000e+00, 92 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 88 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1821 simplex iterations) in 0.20 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 18:06:11 2012 Optimize a model with 4222 rows, 890 columns and 12896 nonzeros Presolve time: 0.01s Presolved: 4222 rows, 890 columns, 12896 nonzeros Variable types: 0 continuous, 890 integer (890 binary) Root relaxation: objective 0.000000e+00, 92 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 90 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 1s 0 0 0.00000 0 158 - 0.00000 - - 1s 0 0 0.00000 0 163 - 0.00000 - - 1s 0 0 0.00000 0 183 - 0.00000 - - 2s 0 0 0.00000 0 183 - 0.00000 - - 2s 0 2 0.00000 0 183 - 0.00000 - - 2s Cutting planes: Clique: 89 Explored 41 nodes (26486 simplex iterations) in 3.47 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 18:06:14 2012 Optimize a model with 4744 rows, 936 columns and 14508 nonzeros Presolve time: 0.01s Presolved: 4744 rows, 936 columns, 14508 nonzeros Variable types: 0 continuous, 936 integer (936 binary) Root relaxation: objective 0.000000e+00, 105 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 59 - 0.00000 - - 0s 0 0 0.00000 0 93 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 115 - 0.00000 - - 1s 0 0 0.00000 0 120 - 0.00000 - - 1s 0 0 0.00000 0 111 - 0.00000 - - 1s 0 0 0.00000 0 175 - 0.00000 - - 1s 0 0 0.00000 0 119 - 0.00000 - - 2s 0 2 0.00000 0 119 - 0.00000 - - 2s * 177 3 17 0.0000000 0.00000 0.0% 62.2 3s Cutting planes: Clique: 47 Explored 178 nodes (29863 simplex iterations) in 3.13 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