current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:17 2012 Optimize a model with 14113 rows, 1762 columns and 43368 nonzeros Presolve time: 0.05s Presolved: 14113 rows, 1762 columns, 43368 nonzeros Variable types: 0 continuous, 1762 integer (1762 binary) Root relaxation: objective 0.000000e+00, 173 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 (550 simplex iterations) in 0.11 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:17 2012 Optimize a model with 7081 rows, 1174 columns and 21684 nonzeros Presolve time: 0.02s Presolved: 7081 rows, 1174 columns, 21684 nonzeros Variable types: 0 continuous, 1174 integer (1174 binary) Root relaxation: objective 0.000000e+00, 107 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (857 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:17 2012 Optimize a model with 3565 rows, 880 columns and 10842 nonzeros Presolve time: 0.01s Presolved: 3565 rows, 880 columns, 10842 nonzeros Variable types: 0 continuous, 880 integer (880 binary) Root relaxation: objective 0.000000e+00, 99 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 76 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1854 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:17 2012 Optimize a model with 5323 rows, 1027 columns and 16263 nonzeros Presolve time: 0.01s Presolved: 5323 rows, 1027 columns, 16263 nonzeros Variable types: 0 continuous, 1027 integer (1027 binary) Root relaxation: objective 0.000000e+00, 108 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 56 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 132 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 0s 0 0 0.00000 0 129 - 0.00000 - - 1s 0 0 0.00000 0 98 - 0.00000 - - 1s 0 0 0.00000 0 97 - 0.00000 - - 2s 0 0 0.00000 0 79 - 0.00000 - - 2s 0 0 0.00000 0 139 - 0.00000 - - 2s 0 0 0.00000 0 144 - 0.00000 - - 3s 0 0 0.00000 0 173 - 0.00000 - - 3s 0 0 0.00000 0 173 - 0.00000 - - 3s 0 2 0.00000 0 173 - 0.00000 - - 4s 81 11 0.00000 12 88 - 0.00000 - 104 5s 910 29 0.00000 8 132 - 0.00000 - 87.8 10s 918 35 0.00000 2 40 - 0.00000 - 87.0 15s 930 37 0.00000 17 131 - 0.00000 - 121 20s 1323 29 0.00000 28 123 - 0.00000 - 119 25s 1876 18 0.00000 26 122 - 0.00000 - 121 30s * 2328 3 28 0.0000000 0.00000 0.0% 122 33s Cutting planes: Clique: 19 Zero half: 1 Explored 2329 nodes (311497 simplex iterations) in 33.90 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:51 2012 Optimize a model with 4151 rows, 929 columns and 12649 nonzeros Presolve time: 0.01s Presolved: 4151 rows, 929 columns, 12649 nonzeros Variable types: 0 continuous, 929 integer (929 binary) Root relaxation: objective 0.000000e+00, 100 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 0 110 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 1s 0 0 0.00000 0 267 - 0.00000 - - 2s 0 0 0.00000 0 285 - 0.00000 - - 3s 0 0 0.00000 0 274 - 0.00000 - - 4s 0 0 0.00000 0 272 - 0.00000 - - 5s 0 0 0.00000 0 291 - 0.00000 - - 5s 0 0 0.00000 0 259 - 0.00000 - - 6s 0 2 0.00000 0 259 - 0.00000 - - 6s Cutting planes: Clique: 101 Zero half: 3 Explored 3 nodes (34262 simplex iterations) in 6.77 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 18:12:58 2012 Optimize a model with 4737 rows, 978 columns and 14456 nonzeros Presolve time: 0.01s Presolved: 4737 rows, 978 columns, 14456 nonzeros Variable types: 0 continuous, 978 integer (978 binary) Root relaxation: objective 0.000000e+00, 98 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 36 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 130 - 0.00000 - - 1s 0 0 0.00000 0 233 - 0.00000 - - 2s 0 0 0.00000 0 187 - 0.00000 - - 3s 0 0 0.00000 0 166 - 0.00000 - - 3s 0 0 0.00000 0 170 - 0.00000 - - 4s 0 0 0.00000 0 183 - 0.00000 - - 4s 0 0 0.00000 0 183 - 0.00000 - - 4s 0 2 0.00000 0 183 - 0.00000 - - 5s Cutting planes: Clique: 116 Zero half: 8 Explored 37 nodes (39438 simplex iterations) in 6.36 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9