current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:39 2012 Optimize a model with 13537 rows, 1738 columns and 41640 nonzeros Presolve time: 0.05s Presolved: 13537 rows, 1738 columns, 41640 nonzeros Variable types: 0 continuous, 1738 integer (1738 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (309 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 18:10:39 2012 Optimize a model with 6793 rows, 1150 columns and 20820 nonzeros Presolve time: 0.02s Presolved: 6793 rows, 1150 columns, 20820 nonzeros Variable types: 0 continuous, 1150 integer (1150 binary) Root relaxation: objective 0.000000e+00, 113 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 (701 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:39 2012 Optimize a model with 3421 rows, 856 columns and 10410 nonzeros Presolve time: 0.01s Presolved: 3421 rows, 856 columns, 10410 nonzeros Variable types: 0 continuous, 856 integer (856 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 76 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1975 simplex iterations) in 0.23 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 18:10:39 2012 Optimize a model with 5107 rows, 1003 columns and 15615 nonzeros Presolve time: 0.01s Presolved: 5107 rows, 1003 columns, 15615 nonzeros Variable types: 0 continuous, 1003 integer (1003 binary) Root relaxation: objective 0.000000e+00, 113 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 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 31 MIR: 3 Zero half: 35 Explored 0 nodes (1307 simplex iterations) in 0.10 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 18:10:39 2012 Optimize a model with 3983 rows, 905 columns and 12145 nonzeros Presolve time: 0.01s Presolved: 3983 rows, 905 columns, 12145 nonzeros Variable types: 0 continuous, 905 integer (905 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 42 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 174 - 0.00000 - - 2s 0 0 0.00000 0 167 - 0.00000 - - 3s 0 0 0.00000 0 189 - 0.00000 - - 3s 0 0 0.00000 0 204 - 0.00000 - - 4s 0 0 0.00000 0 202 - 0.00000 - - 4s 0 2 0.00000 0 202 - 0.00000 - - 4s Cutting planes: Clique: 56 Zero half: 13 Explored 11 nodes (31223 simplex iterations) in 4.77 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 18:10:44 2012 Optimize a model with 4545 rows, 954 columns and 13880 nonzeros Presolve time: 0.01s Presolved: 4545 rows, 954 columns, 13880 nonzeros Variable types: 0 continuous, 954 integer (954 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 32 - 0.00000 - - 0s 0 0 0.00000 0 55 - 0.00000 - - 0s 0 0 0.00000 0 167 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 124 - 0.00000 - - 1s 0 0 0.00000 0 110 - 0.00000 - - 1s 0 0 0.00000 0 107 - 0.00000 - - 1s 0 0 0.00000 0 119 - 0.00000 - - 2s 0 0 0.00000 0 123 - 0.00000 - - 2s 0 0 0.00000 0 148 - 0.00000 - - 2s 0 0 0.00000 0 144 - 0.00000 - - 3s 0 2 0.00000 0 66 - 0.00000 - - 3s 142 6 0.00000 7 161 - 0.00000 - 108 5s Cutting planes: Clique: 83 Zero half: 2 Explored 319 nodes (60354 simplex iterations) in 6.51 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