current bounds on the number of colors: 0 -- 157 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:01:29 2012 Optimize a model with 47737 rows, 12856 columns and 154986 nonzeros Presolve time: 0.16s Presolved: 47737 rows, 12856 columns, 154986 nonzeros Variable types: 0 continuous, 12856 integer (12856 binary) Root relaxation: objective 0.000000e+00, 532 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 (860 simplex iterations) in 0.26 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 19:01:30 2012 Optimize a model with 23947 rows, 6733 columns and 77493 nonzeros Presolve time: 0.13s Presolved: 23947 rows, 6733 columns, 77493 nonzeros Variable types: 0 continuous, 6733 integer (6733 binary) Root relaxation: objective 0.000000e+00, 420 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 (721 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:01:30 2012 Optimize a model with 11747 rows, 3593 columns and 37753 nonzeros Presolve time: 0.04s Presolved: 11747 rows, 3593 columns, 37753 nonzeros Variable types: 0 continuous, 3593 integer (3593 binary) Root relaxation: objective 0.000000e+00, 319 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 (590 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 19:01:30 2012 Optimize a model with 5647 rows, 2023 columns and 17883 nonzeros Presolve time: 0.02s Presolved: 5647 rows, 2023 columns, 17883 nonzeros Variable types: 0 continuous, 2023 integer (2023 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 (637 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 19:01:30 2012 Optimize a model with 2597 rows, 1238 columns and 7948 nonzeros Presolve time: 0.01s Presolved: 2597 rows, 1238 columns, 7948 nonzeros Variable types: 0 continuous, 1238 integer (1238 binary) Root relaxation: objective 0.000000e+00, 356 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 0 284 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 337 - 0.00000 - - 0s 0 0 0.00000 0 350 - 0.00000 - - 0s 0 0 0.00000 0 345 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 362 - 0.00000 - - 1s 0 0 0.00000 0 362 - 0.00000 - - 1s 0 2 0.00000 0 362 - 0.00000 - - 1s * 579 2 23 0.0000000 0.00000 0.0% 70.2 3s Cutting planes: Clique: 1 Zero half: 28 Explored 580 nodes (56392 simplex iterations) in 3.55 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 19:01:34 2012 Optimize a model with 1377 rows, 924 columns and 3974 nonzeros Presolve removed 157 rows and 157 columns Presolve time: 0.00s Presolved: 1220 rows, 767 columns, 3660 nonzeros Variable types: 0 continuous, 767 integer (767 binary) Root relaxation: objective 0.000000e+00, 162 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 (700 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 19:01:34 2012 Optimize a model with 1987 rows, 1081 columns and 5961 nonzeros Presolve time: 0.00s Presolved: 1987 rows, 1081 columns, 5961 nonzeros Variable types: 0 continuous, 1081 integer (1081 binary) Root relaxation: objective 0.000000e+00, 380 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 0 300 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3828 simplex iterations) in 0.33 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