current bounds on the number of colors: 0 -- 158 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:46 2012 Optimize a model with 49059 rows, 13101 columns and 159185 nonzeros Presolve time: 0.16s Presolved: 49059 rows, 13101 columns, 159185 nonzeros Variable types: 0 continuous, 13101 integer (13101 binary) Root relaxation: objective 0.000000e+00, 546 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 (885 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:47 2012 Optimize a model with 24299 rows, 6781 columns and 78585 nonzeros Presolve time: 0.13s Presolved: 24299 rows, 6781 columns, 78585 nonzeros Variable types: 0 continuous, 6781 integer (6781 binary) Root relaxation: objective 0.000000e+00, 421 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 (727 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 19:06:47 2012 Optimize a model with 11919 rows, 3621 columns and 38285 nonzeros Presolve time: 0.04s Presolved: 11919 rows, 3621 columns, 38285 nonzeros Variable types: 0 continuous, 3621 integer (3621 binary) Root relaxation: objective 0.000000e+00, 329 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 (613 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 19:06:48 2012 Optimize a model with 5729 rows, 2041 columns and 18135 nonzeros Presolve time: 0.02s Presolved: 5729 rows, 2041 columns, 18135 nonzeros Variable types: 0 continuous, 2041 integer (2041 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 (616 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 19:06:48 2012 Optimize a model with 2634 rows, 1251 columns and 8060 nonzeros Presolve time: 0.01s Presolved: 2634 rows, 1251 columns, 8060 nonzeros Variable types: 0 continuous, 1251 integer (1251 binary) Root relaxation: objective 0.000000e+00, 400 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 0 300 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 2 0.00000 0 310 - 0.00000 - - 1s * 604 140 12 0.0000000 0.00000 0.0% 70.0 4s Cutting planes: Gomory: 6 Zero half: 170 Explored 604 nodes (59320 simplex iterations) in 4.23 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 19:06:52 2012 Optimize a model with 1396 rows, 935 columns and 4030 nonzeros Presolve removed 158 rows and 158 columns Presolve time: 0.00s Presolved: 1238 rows, 777 columns, 3714 nonzeros Variable types: 0 continuous, 777 integer (777 binary) Root relaxation: objective 0.000000e+00, 166 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 (688 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 19:06:52 2012 Optimize a model with 2015 rows, 1093 columns and 6045 nonzeros Presolve time: 0.01s Presolved: 2015 rows, 1093 columns, 6045 nonzeros Variable types: 0 continuous, 1093 integer (1093 binary) Root relaxation: objective 0.000000e+00, 385 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 410 - 0.00000 - - 0s 0 0 0.00000 0 430 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 393 Explored 0 nodes (6258 simplex iterations) in 0.65 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