current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:39 2012 Optimize a model with 17993 rows, 2068 columns and 55198 nonzeros Presolve time: 0.07s Presolved: 17993 rows, 2068 columns, 55198 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Root relaxation: objective 0.000000e+00, 174 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 (456 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 18:27:39 2012 Optimize a model with 9023 rows, 1379 columns and 27599 nonzeros Presolve time: 0.03s Presolved: 9023 rows, 1379 columns, 27599 nonzeros Variable types: 0 continuous, 1379 integer (1379 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 50 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1051 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 18:27:39 2012 Optimize a model with 4193 rows, 1008 columns and 12738 nonzeros Presolve time: 0.01s Presolved: 4193 rows, 1008 columns, 12738 nonzeros Variable types: 0 continuous, 1008 integer (1008 binary) Root relaxation: objective 0.000000e+00, 107 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 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3129 simplex iterations) in 0.39 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 18:27:40 2012 Optimize a model with 6263 rows, 1167 columns and 19107 nonzeros Presolve time: 0.02s Presolved: 6263 rows, 1167 columns, 19107 nonzeros Variable types: 0 continuous, 1167 integer (1167 binary) Root relaxation: objective 0.000000e+00, 111 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 32 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 1s 0 0 0.00000 0 146 - 0.00000 - - 1s 0 0 0.00000 0 158 - 0.00000 - - 2s 0 0 0.00000 0 212 - 0.00000 - - 3s 0 0 0.00000 0 143 - 0.00000 - - 4s 0 0 0.00000 0 139 - 0.00000 - - 4s 0 0 0.00000 0 168 - 0.00000 - - 5s 0 0 0.00000 0 168 - 0.00000 - - 6s 0 2 0.00000 0 168 - 0.00000 - - 6s 259 15 0.00000 14 122 - 0.00000 - 130 10s Cutting planes: Clique: 135 Zero half: 4 Explored 681 nodes (115010 simplex iterations) in 13.60 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 18:27:54 2012 Optimize a model with 7643 rows, 1273 columns and 23353 nonzeros Presolve time: 0.02s Presolved: 7643 rows, 1273 columns, 23353 nonzeros Variable types: 0 continuous, 1273 integer (1273 binary) Root relaxation: objective 0.000000e+00, 116 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 33 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1612 simplex iterations) in 0.14 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 18:27:54 2012 Optimize a model with 6953 rows, 1220 columns and 21230 nonzeros Presolve time: 0.02s Presolved: 6953 rows, 1220 columns, 21230 nonzeros Variable types: 0 continuous, 1220 integer (1220 binary) Root relaxation: objective 0.000000e+00, 111 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 59 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4409 simplex iterations) in 0.58 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