current bounds on the number of colors: 0 -- 157 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:01:20 2012 Optimize a model with 51091 rows, 12899 columns and 165048 nonzeros Presolve time: 0.16s Presolved: 51091 rows, 12899 columns, 165048 nonzeros Variable types: 0 continuous, 12899 integer (12899 binary) Root relaxation: objective 0.000000e+00, 553 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 (890 simplex iterations) in 0.27 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:01:21 2012 Optimize a model with 25624 rows, 6776 columns and 82524 nonzeros Presolve time: 0.13s Presolved: 25624 rows, 6776 columns, 82524 nonzeros Variable types: 0 continuous, 6776 integer (6776 binary) Root relaxation: objective 0.000000e+00, 496 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 (845 simplex iterations) in 0.19 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 19:01:21 2012 Optimize a model with 12564 rows, 3636 columns and 40204 nonzeros Presolve time: 0.05s Presolved: 12564 rows, 3636 columns, 40204 nonzeros Variable types: 0 continuous, 3636 integer (3636 binary) Root relaxation: objective 0.000000e+00, 350 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 (649 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 19:01:22 2012 Optimize a model with 6034 rows, 2066 columns and 19044 nonzeros Presolve time: 0.02s Presolved: 6034 rows, 2066 columns, 19044 nonzeros Variable types: 0 continuous, 2066 integer (2066 binary) Root relaxation: objective 0.000000e+00, 333 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 (615 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 19:01:22 2012 Optimize a model with 2769 rows, 1281 columns and 8464 nonzeros Presolve time: 0.01s Presolved: 2769 rows, 1281 columns, 8464 nonzeros Variable types: 0 continuous, 1281 integer (1281 binary) Root relaxation: objective 0.000000e+00, 343 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 158 - 0.00000 - - 1s 0 0 0.00000 0 164 - 0.00000 - - 1s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 0 0.00000 0 366 - 0.00000 - - 2s 0 0 0.00000 0 366 - 0.00000 - - 2s 0 2 0.00000 0 366 - 0.00000 - - 3s 637 21 0.00000 18 256 - 0.00000 - 63.2 5s * 740 3 22 0.0000000 0.00000 0.0% 65.3 5s Cutting planes: Zero half: 6 Explored 741 nodes (79274 simplex iterations) in 5.32 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 19:01:27 2012 Optimize a model with 1463 rows, 967 columns and 4232 nonzeros Presolve removed 157 rows and 157 columns Presolve time: 0.00s Presolved: 1306 rows, 810 columns, 3918 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Root relaxation: objective 0.000000e+00, 164 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 0 157 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (691 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 19:01:27 2012 Optimize a model with 2116 rows, 1124 columns and 6348 nonzeros Presolve time: 0.01s Presolved: 2116 rows, 1124 columns, 6348 nonzeros Variable types: 0 continuous, 1124 integer (1124 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 0 308 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3860 simplex iterations) in 0.36 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