current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:15 2012 Optimize a model with 13993 rows, 1757 columns and 43008 nonzeros Presolve time: 0.05s Presolved: 13993 rows, 1757 columns, 43008 nonzeros Variable types: 0 continuous, 1757 integer (1757 binary) Root relaxation: objective 0.000000e+00, 103 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 (267 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:15 2012 Optimize a model with 7021 rows, 1169 columns and 21504 nonzeros Presolve time: 0.02s Presolved: 7021 rows, 1169 columns, 21504 nonzeros Variable types: 0 continuous, 1169 integer (1169 binary) Root relaxation: objective 0.000000e+00, 105 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 8 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (973 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:15 2012 Optimize a model with 3535 rows, 875 columns and 10752 nonzeros Presolve time: 0.01s Presolved: 3535 rows, 875 columns, 10752 nonzeros Variable types: 0 continuous, 875 integer (875 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 50 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2249 simplex iterations) in 0.25 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 18:11:16 2012 Optimize a model with 5278 rows, 1022 columns and 16128 nonzeros Presolve time: 0.01s Presolved: 5278 rows, 1022 columns, 16128 nonzeros Variable types: 0 continuous, 1022 integer (1022 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 36 - 0.00000 - - 0s 0 0 0.00000 0 24 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 0 0.00000 0 106 - 0.00000 - - 1s 0 0 0.00000 0 117 - 0.00000 - - 1s 0 0 0.00000 0 103 - 0.00000 - - 2s 0 0 0.00000 0 112 - 0.00000 - - 2s 0 0 0.00000 0 132 - 0.00000 - - 3s 0 0 0.00000 0 83 - 0.00000 - - 3s 0 0 0.00000 0 122 - 0.00000 - - 3s 0 0 0.00000 0 70 - 0.00000 - - 4s 0 2 0.00000 0 70 - 0.00000 - - 5s H 56 1 0.0000000 0.00000 0.0% 90.4 6s Cutting planes: Clique: 26 Explored 56 nodes (36536 simplex iterations) in 6.40 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 18:11:22 2012 Optimize a model with 4116 rows, 924 columns and 12544 nonzeros Presolve time: 0.01s Presolved: 4116 rows, 924 columns, 12544 nonzeros Variable types: 0 continuous, 924 integer (924 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 54 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 0.00000 0 275 - 0.00000 - - 1s 0 0 0.00000 0 255 - 0.00000 - - 2s 0 0 infeasible 0 - 0.10000 - - 2s Cutting planes: Clique: 117 Zero half: 237 Explored 0 nodes (12799 simplex iterations) in 2.43 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:25 2012 Optimize a model with 4697 rows, 973 columns and 14336 nonzeros Presolve time: 0.01s Presolved: 4697 rows, 973 columns, 14336 nonzeros Variable types: 0 continuous, 973 integer (973 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 52 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 217 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 184 - 0.00000 - - 1s 0 0 0.00000 0 203 - 0.00000 - - 2s 0 0 0.00000 0 237 - 0.00000 - - 3s 0 0 0.00000 0 208 - 0.00000 - - 3s 0 2 0.00000 0 208 - 0.00000 - - 4s Cutting planes: Clique: 108 Zero half: 8 Explored 25 nodes (28100 simplex iterations) in 4.66 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