current bounds on the number of colors: 0 -- 158 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:03 2012 Optimize a model with 53009 rows, 13151 columns and 171035 nonzeros Presolve time: 0.17s Presolved: 53009 rows, 13151 columns, 171035 nonzeros Variable types: 0 continuous, 13151 integer (13151 binary) Root relaxation: objective 0.000000e+00, 547 iterations, 0.04 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 (888 simplex iterations) in 0.28 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:04 2012 Optimize a model with 26249 rows, 6831 columns and 84435 nonzeros Presolve time: 0.13s Presolved: 26249 rows, 6831 columns, 84435 nonzeros Variable types: 0 continuous, 6831 integer (6831 binary) Root relaxation: objective 0.000000e+00, 418 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 (741 simplex iterations) in 0.18 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:05 2012 Optimize a model with 12869 rows, 3671 columns and 41135 nonzeros Presolve time: 0.05s Presolved: 12869 rows, 3671 columns, 41135 nonzeros Variable types: 0 continuous, 3671 integer (3671 binary) Root relaxation: objective 0.000000e+00, 318 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 (609 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:05 2012 Optimize a model with 6179 rows, 2091 columns and 19485 nonzeros Presolve time: 0.02s Presolved: 6179 rows, 2091 columns, 19485 nonzeros Variable types: 0 continuous, 2091 integer (2091 binary) Root relaxation: objective 0.000000e+00, 340 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 (604 simplex iterations) in 0.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:05 2012 Optimize a model with 2834 rows, 1301 columns and 8660 nonzeros Presolve time: 0.01s Presolved: 2834 rows, 1301 columns, 8660 nonzeros Variable types: 0 continuous, 1301 integer (1301 binary) Root relaxation: objective 0.000000e+00, 354 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 264 - 0.00000 - - 1s 0 0 0.00000 0 224 - 0.00000 - - 1s 0 0 0.00000 0 244 - 0.00000 - - 2s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 2 0.00000 0 230 - 0.00000 - - 2s 604 70 0.00000 18 376 - 0.00000 - 71.3 5s 612 75 0.00000 17 342 - 0.00000 - 70.4 10s 868 31 infeasible 28 - 0.00000 - 133 15s 1542 57 0.00000 18 329 - 0.00000 - 139 20s 2256 105 0.00000 22 242 - 0.00000 - 139 25s 2904 89 infeasible 25 - 0.00000 - 142 30s * 3135 1 32 0.0000000 0.00000 0.0% 143 31s Cutting planes: Zero half: 9 Explored 3136 nodes (477072 simplex iterations) in 31.81 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:37 2012 Optimize a model with 1496 rows, 985 columns and 4330 nonzeros Presolve removed 158 rows and 158 columns Presolve time: 0.00s Presolved: 1338 rows, 827 columns, 4014 nonzeros Variable types: 0 continuous, 827 integer (827 binary) Root relaxation: objective 0.000000e+00, 167 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 0 158 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (668 simplex iterations) in 0.02 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:08:37 2012 Optimize a model with 2165 rows, 1143 columns and 6495 nonzeros Presolve time: 0.01s Presolved: 2165 rows, 1143 columns, 6495 nonzeros Variable types: 0 continuous, 1143 integer (1143 binary) Root relaxation: objective 0.000000e+00, 368 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 0 308 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 396 - 0.00000 - - 0s 0 0 0.00000 0 438 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 610 Explored 0 nodes (7070 simplex iterations) in 0.81 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4