current bounds on the number of colors: 0 -- 140 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:03 2012 Optimize a model with 33810 rows, 10281 columns and 110810 nonzeros Presolve time: 0.14s Presolved: 33810 rows, 10281 columns, 110810 nonzeros Variable types: 0 continuous, 10281 integer (10281 binary) Root relaxation: objective 0.000000e+00, 456 iterations, 0.03 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 (733 simplex iterations) in 0.21 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:04 2012 Optimize a model with 16975 rows, 5381 columns and 55405 nonzeros Presolve time: 0.09s Presolved: 16975 rows, 5381 columns, 55405 nonzeros Variable types: 0 continuous, 5381 integer (5381 binary) Root relaxation: objective 0.000000e+00, 346 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 (587 simplex iterations) in 0.12 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:04 2012 Optimize a model with 8317 rows, 2861 columns and 26911 nonzeros Presolve time: 0.03s Presolved: 8317 rows, 2861 columns, 26911 nonzeros Variable types: 0 continuous, 2861 integer (2861 binary) Root relaxation: objective 0.000000e+00, 282 iterations, 0.00 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 (602 simplex iterations) in 0.05 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:04 2012 Optimize a model with 3988 rows, 1601 columns and 12664 nonzeros Presolve time: 0.01s Presolved: 3988 rows, 1601 columns, 12664 nonzeros Variable types: 0 continuous, 1601 integer (1601 binary) Root relaxation: objective 0.000000e+00, 308 iterations, 0.00 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 (540 simplex iterations) in 0.02 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:04 2012 Optimize a model with 2064 rows, 1041 columns and 6332 nonzeros Presolve time: 0.01s Presolved: 2064 rows, 1041 columns, 6332 nonzeros Variable types: 0 continuous, 1041 integer (1041 binary) Root relaxation: objective 0.000000e+00, 316 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 0 236 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 39 Zero half: 150 Explored 0 nodes (2056 simplex iterations) in 0.09 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 18:40:05 2012 Optimize a model with 1102 rows, 761 columns and 3166 nonzeros Presolve removed 140 rows and 140 columns Presolve time: 0.00s Presolved: 962 rows, 621 columns, 2886 nonzeros Variable types: 0 continuous, 621 integer (621 binary) Root relaxation: objective 0.000000e+00, 146 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 0 140 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (589 simplex iterations) in 0.01 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 18:40:05 2012 Optimize a model with 1583 rows, 901 columns and 4749 nonzeros Presolve time: 0.00s Presolved: 1583 rows, 901 columns, 4749 nonzeros Variable types: 0 continuous, 901 integer (901 binary) Root relaxation: objective 0.000000e+00, 339 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 0 272 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2898 simplex iterations) in 0.22 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