current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:09 2012 Optimize a model with 19440 rows, 2176 columns and 59616 nonzeros Presolve time: 0.08s Presolved: 19440 rows, 2176 columns, 59616 nonzeros Variable types: 0 continuous, 2176 integer (2176 binary) Root relaxation: objective 0.000000e+00, 147 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 (504 simplex iterations) in 0.16 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:10 2012 Optimize a model with 9388 rows, 1420 columns and 28704 nonzeros Presolve time: 0.03s Presolved: 9388 rows, 1420 columns, 28704 nonzeros Variable types: 0 continuous, 1420 integer (1420 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1467 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: 0 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:10 2012 Optimize a model with 4362 rows, 1042 columns and 13248 nonzeros Presolve time: 0.01s Presolved: 4362 rows, 1042 columns, 13248 nonzeros Variable types: 0 continuous, 1042 integer (1042 binary) Root relaxation: objective 0.000000e+00, 108 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 82 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3650 simplex iterations) in 0.52 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 18:34:10 2012 Optimize a model with 6516 rows, 1204 columns and 19872 nonzeros Presolve time: 0.02s Presolved: 6516 rows, 1204 columns, 19872 nonzeros Variable types: 0 continuous, 1204 integer (1204 binary) Root relaxation: objective 0.000000e+00, 122 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 58 - 0.00000 - - 0s 0 0 0.00000 0 53 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 1s 0 0 0.00000 0 257 - 0.00000 - - 1s 0 0 0.00000 0 191 - 0.00000 - - 2s 0 0 0.00000 0 182 - 0.00000 - - 3s 0 0 0.00000 0 163 - 0.00000 - - 4s 0 0 0.00000 0 174 - 0.00000 - - 5s 0 0 0.00000 0 152 - 0.00000 - - 5s 0 0 0.00000 0 257 - 0.00000 - - 6s 0 0 0.00000 0 223 - 0.00000 - - 7s 0 0 0.00000 0 254 - 0.00000 - - 7s 0 0 0.00000 0 168 - 0.00000 - - 8s 0 2 0.00000 0 168 - 0.00000 - - 9s 45 7 0.00000 11 155 - 0.00000 - 181 10s Cutting planes: Clique: 172 Zero half: 17 Explored 119 nodes (68495 simplex iterations) in 10.96 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 18:34:22 2012 Optimize a model with 7952 rows, 1312 columns and 24288 nonzeros Presolve time: 0.02s Presolved: 7952 rows, 1312 columns, 24288 nonzeros Variable types: 0 continuous, 1312 integer (1312 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 46 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (995 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:22 2012 Optimize a model with 7234 rows, 1258 columns and 22080 nonzeros Presolve time: 0.02s Presolved: 7234 rows, 1258 columns, 22080 nonzeros Variable types: 0 continuous, 1258 integer (1258 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 42 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 126 - 0.00000 - - 0s 0 0 0.00000 0 176 - 0.00000 - - 0s 0 0 0.00000 0 121 - 0.00000 - - 1s 0 0 0.00000 0 194 - 0.00000 - - 2s 0 0 0.00000 0 169 - 0.00000 - - 3s 0 0 0.00000 0 156 - 0.00000 - - 3s 0 0 0.00000 0 60 - 0.00000 - - 4s 0 0 0.00000 0 109 - 0.00000 - - 4s 0 0 0.00000 0 166 - 0.00000 - - 5s 0 0 0.00000 0 204 - 0.00000 - - 6s 0 0 0.00000 0 142 - 0.00000 - - 6s 0 2 0.00000 0 142 - 0.00000 - - 7s * 416 0 17 0.0000000 0.00000 0.0% 65.4 9s Cutting planes: Clique: 82 Zero half: 37 Explored 417 nodes (69359 simplex iterations) in 9.47 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