current bounds on the number of colors: 0 -- 141 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:12 2012 Optimize a model with 36891 rows, 10395 columns and 120120 nonzeros Presolve time: 0.14s Presolved: 36891 rows, 10395 columns, 120120 nonzeros Variable types: 0 continuous, 10395 integer (10395 binary) Root relaxation: objective 0.000000e+00, 469 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 (771 simplex iterations) in 0.22 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 18:40:13 2012 Optimize a model with 18516 rows, 5460 columns and 60060 nonzeros Presolve time: 0.09s Presolved: 18516 rows, 5460 columns, 60060 nonzeros Variable types: 0 continuous, 5460 integer (5460 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 (603 simplex iterations) in 0.13 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 18:40:13 2012 Optimize a model with 9066 rows, 2922 columns and 29172 nonzeros Presolve time: 0.03s Presolved: 9066 rows, 2922 columns, 29172 nonzeros Variable types: 0 continuous, 2922 integer (2922 binary) Root relaxation: objective 0.000000e+00, 287 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 (513 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 18:40:13 2012 Optimize a model with 4341 rows, 1653 columns and 13728 nonzeros Presolve time: 0.01s Presolved: 4341 rows, 1653 columns, 13728 nonzeros Variable types: 0 continuous, 1653 integer (1653 binary) Root relaxation: objective 0.000000e+00, 309 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 (559 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:13 2012 Optimize a model with 2241 rows, 1089 columns and 6864 nonzeros Presolve time: 0.01s Presolved: 2241 rows, 1089 columns, 6864 nonzeros Variable types: 0 continuous, 1089 integer (1089 binary) Root relaxation: objective 0.000000e+00, 353 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 0 246 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 63 Zero half: 177 Explored 0 nodes (2744 simplex iterations) in 0.14 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 18:40:14 2012 Optimize a model with 1191 rows, 807 columns and 3432 nonzeros Presolve removed 141 rows and 141 columns Presolve time: 0.00s Presolved: 1050 rows, 666 columns, 3150 nonzeros Variable types: 0 continuous, 666 integer (666 binary) Root relaxation: objective 0.000000e+00, 150 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 0 141 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (591 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 18:40:14 2012 Optimize a model with 1716 rows, 948 columns and 5148 nonzeros Presolve time: 0.00s Presolved: 1716 rows, 948 columns, 5148 nonzeros Variable types: 0 continuous, 948 integer (948 binary) Root relaxation: objective 0.000000e+00, 334 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 0 276 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2882 simplex iterations) in 0.21 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