current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:37 2012 Optimize a model with 18305 rows, 2080 columns and 56134 nonzeros Presolve time: 0.07s Presolved: 18305 rows, 2080 columns, 56134 nonzeros Variable types: 0 continuous, 2080 integer (2080 binary) Root relaxation: objective 0.000000e+00, 127 iterations, 0.02 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 (318 simplex iterations) in 0.12 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:37 2012 Optimize a model with 9179 rows, 1391 columns and 28067 nonzeros Presolve time: 0.03s Presolved: 9179 rows, 1391 columns, 28067 nonzeros Variable types: 0 continuous, 1391 integer (1391 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1202 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:37 2012 Optimize a model with 4265 rows, 1020 columns and 12954 nonzeros Presolve time: 0.01s Presolved: 4265 rows, 1020 columns, 12954 nonzeros Variable types: 0 continuous, 1020 integer (1020 binary) Root relaxation: objective 0.000000e+00, 106 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 66 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2687 simplex iterations) in 0.35 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:38 2012 Optimize a model with 6371 rows, 1179 columns and 19431 nonzeros Presolve time: 0.02s Presolved: 6371 rows, 1179 columns, 19431 nonzeros Variable types: 0 continuous, 1179 integer (1179 binary) Root relaxation: objective 0.000000e+00, 125 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 46 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 205 - 0.00000 - - 1s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 0 0.00000 0 167 - 0.00000 - - 2s 0 0 0.00000 0 186 - 0.00000 - - 3s 0 0 0.00000 0 165 - 0.00000 - - 4s 0 0 0.00000 0 134 - 0.00000 - - 4s 0 0 0.00000 0 219 - 0.00000 - - 5s 0 0 0.00000 0 210 - 0.00000 - - 6s 0 2 0.00000 0 210 - 0.00000 - - 6s 301 7 0.00000 10 160 - 0.00000 - 125 10s Cutting planes: Clique: 125 Explored 321 nodes (75143 simplex iterations) in 10.22 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:48 2012 Optimize a model with 7775 rows, 1285 columns and 23749 nonzeros Presolve time: 0.02s Presolved: 7775 rows, 1285 columns, 23749 nonzeros Variable types: 0 continuous, 1285 integer (1285 binary) Root relaxation: objective 0.000000e+00, 117 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (953 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:48 2012 Optimize a model with 7073 rows, 1232 columns and 21590 nonzeros Presolve time: 0.02s Presolved: 7073 rows, 1232 columns, 21590 nonzeros Variable types: 0 continuous, 1232 integer (1232 binary) Root relaxation: objective 0.000000e+00, 123 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 63 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 5 Clique: 62 Zero half: 13 Explored 0 nodes (2553 simplex iterations) in 0.26 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: 10