current bounds on the number of colors: 0 -- 58 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:14 2012 Optimize a model with 24099 rows, 2511 columns and 73805 nonzeros Presolve time: 0.10s Presolved: 24099 rows, 2511 columns, 73805 nonzeros Variable types: 0 continuous, 2511 integer (2511 binary) Root relaxation: objective 0.000000e+00, 176 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 (445 simplex iterations) in 0.17 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 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:15 2012 Optimize a model with 11664 rows, 1641 columns and 35630 nonzeros Presolve time: 0.04s Presolved: 11664 rows, 1641 columns, 35630 nonzeros Variable types: 0 continuous, 1641 integer (1641 binary) Root relaxation: objective 0.000000e+00, 133 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 18 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1380 simplex iterations) in 0.15 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:15 2012 Optimize a model with 5861 rows, 1235 columns and 17815 nonzeros Presolve time: 0.02s Presolved: 5861 rows, 1235 columns, 17815 nonzeros Variable types: 0 continuous, 1235 integer (1235 binary) Root relaxation: objective 0.000000e+00, 116 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 60 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3164 simplex iterations) in 0.46 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:15 2012 Optimize a model with 8348 rows, 1409 columns and 25450 nonzeros Presolve time: 0.02s Presolved: 8348 rows, 1409 columns, 25450 nonzeros Variable types: 0 continuous, 1409 integer (1409 binary) Root relaxation: objective 0.000000e+00, 133 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 64 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 1s 0 0 0.00000 0 159 - 0.00000 - - 1s 0 0 0.00000 0 116 - 0.00000 - - 2s 0 0 0.00000 0 80 - 0.00000 - - 3s 0 0 0.00000 0 159 - 0.00000 - - 3s 0 0 0.00000 0 22 - 0.00000 - - 4s 0 0 0.00000 0 87 - 0.00000 - - 5s 0 0 0.00000 0 97 - 0.00000 - - 6s 0 0 0.00000 0 98 - 0.00000 - - 6s 0 0 0.00000 0 97 - 0.00000 - - 8s 0 2 0.00000 0 80 - 0.00000 - - 9s 1 4 0.00000 1 166 - 0.00000 - 1482 10s 515 13 infeasible 18 - 0.00000 - 91.2 15s * 594 0 17 0.0000000 0.00000 0.0% 90.6 15s Cutting planes: Clique: 45 Zero half: 1 Explored 595 nodes (96681 simplex iterations) in 15.57 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:31 2012 Optimize a model with 6690 rows, 1293 columns and 20360 nonzeros Presolve time: 0.02s Presolved: 6690 rows, 1293 columns, 20360 nonzeros Variable types: 0 continuous, 1293 integer (1293 binary) Root relaxation: objective 0.000000e+00, 128 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 66 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 2s 0 0 0.00000 0 316 - 0.00000 - - 3s 0 0 0.00000 0 294 - 0.00000 - - 4s 0 0 0.00000 0 335 - 0.00000 - - 6s 0 0 0.00000 0 310 - 0.00000 - - 7s 0 0 0.00000 0 343 - 0.00000 - - 8s 0 0 0.00000 0 232 - 0.00000 - - 9s 0 2 0.00000 0 232 - 0.00000 - - 11s Cutting planes: Clique: 104 Zero half: 2 Explored 15 nodes (51724 simplex iterations) in 11.81 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: 8 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:43 2012 Optimize a model with 7519 rows, 1351 columns and 22905 nonzeros Presolve time: 0.02s Presolved: 7519 rows, 1351 columns, 22905 nonzeros Variable types: 0 continuous, 1351 integer (1351 binary) Root relaxation: objective 0.000000e+00, 132 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 52 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 187 - 0.00000 - - 1s 0 0 0.00000 0 269 - 0.00000 - - 1s 0 0 0.00000 0 234 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 3s 0 0 0.00000 0 296 - 0.00000 - - 5s 0 0 0.00000 0 285 - 0.00000 - - 5s 0 0 0.00000 0 247 - 0.00000 - - 7s 0 0 0.00000 0 315 - 0.00000 - - 8s 0 0 0.00000 0 214 - 0.00000 - - 9s 0 2 0.00000 0 181 - 0.00000 - - 10s 165 11 infeasible 14 - 0.00000 - 229 15s 349 7 0.00000 10 194 - 0.00000 - 223 20s Cutting planes: Clique: 298 Zero half: 7 Explored 427 nodes (141668 simplex iterations) in 22.14 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 10