current bounds on the number of colors: 0 -- 132 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:26 2012 Optimize a model with 30624 rows, 9174 columns and 100188 nonzeros Presolve time: 0.14s Presolved: 30624 rows, 9174 columns, 100188 nonzeros Variable types: 0 continuous, 9174 integer (9174 binary) Root relaxation: objective 0.000000e+00, 436 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 (722 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 -- 66 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:26 2012 Optimize a model with 15378 rows, 4818 columns and 50094 nonzeros Presolve time: 0.07s Presolved: 15378 rows, 4818 columns, 50094 nonzeros Variable types: 0 continuous, 4818 integer (4818 binary) Root relaxation: objective 0.000000e+00, 392 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 (679 simplex iterations) in 0.11 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:26 2012 Optimize a model with 7524 rows, 2574 columns and 24288 nonzeros Presolve time: 0.03s Presolved: 7524 rows, 2574 columns, 24288 nonzeros Variable types: 0 continuous, 2574 integer (2574 binary) Root relaxation: objective 0.000000e+00, 303 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 (553 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:27 2012 Optimize a model with 3828 rows, 1518 columns and 12144 nonzeros Presolve time: 0.01s Presolved: 3828 rows, 1518 columns, 12144 nonzeros Variable types: 0 continuous, 1518 integer (1518 binary) Root relaxation: objective 0.000000e+00, 300 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 (531 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 18:35:27 2012 Optimize a model with 1980 rows, 990 columns and 6072 nonzeros Presolve time: 0.01s Presolved: 1980 rows, 990 columns, 6072 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Root relaxation: objective 0.000000e+00, 335 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 0 193 - 0.00000 - - 0s 0 0 0.00000 0 53 - 0.00000 - - 0s Cutting planes: Clique: 2 Explored 0 nodes (4040 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:27 2012 Optimize a model with 1056 rows, 726 columns and 3036 nonzeros Presolve removed 132 rows and 132 columns Presolve time: 0.00s Presolved: 924 rows, 594 columns, 2772 nonzeros Variable types: 0 continuous, 594 integer (594 binary) Root relaxation: objective 0.000000e+00, 139 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 0 132 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (537 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 18:35:27 2012 Optimize a model with 1518 rows, 858 columns and 4554 nonzeros Presolve time: 0.00s Presolved: 1518 rows, 858 columns, 4554 nonzeros Variable types: 0 continuous, 858 integer (858 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 0 248 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 341 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 22 Zero half: 283 Explored 0 nodes (4398 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