current bounds on the number of colors: 0 -- 157 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:02:19 2012 Optimize a model with 48283 rows, 12863 columns and 156624 nonzeros Presolve time: 0.16s Presolved: 48283 rows, 12863 columns, 156624 nonzeros Variable types: 0 continuous, 12863 integer (12863 binary) Root relaxation: objective 0.000000e+00, 556 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 (887 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:02:20 2012 Optimize a model with 24220 rows, 6740 columns and 78312 nonzeros Presolve time: 0.13s Presolved: 24220 rows, 6740 columns, 78312 nonzeros Variable types: 0 continuous, 6740 integer (6740 binary) Root relaxation: objective 0.000000e+00, 420 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 (720 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 19:02:20 2012 Optimize a model with 11880 rows, 3600 columns and 38152 nonzeros Presolve time: 0.04s Presolved: 11880 rows, 3600 columns, 38152 nonzeros Variable types: 0 continuous, 3600 integer (3600 binary) Root relaxation: objective 0.000000e+00, 321 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 (592 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 19:02:20 2012 Optimize a model with 5710 rows, 2030 columns and 18072 nonzeros Presolve time: 0.02s Presolved: 5710 rows, 2030 columns, 18072 nonzeros Variable types: 0 continuous, 2030 integer (2030 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 (589 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 19:02:20 2012 Optimize a model with 2625 rows, 1245 columns and 8032 nonzeros Presolve time: 0.01s Presolved: 2625 rows, 1245 columns, 8032 nonzeros Variable types: 0 continuous, 1245 integer (1245 binary) Root relaxation: objective 0.000000e+00, 346 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 0 294 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 0s 0 0 0.00000 0 333 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 2 0.00000 0 332 - 0.00000 - - 1s * 101 5 23 0.0000000 0.00000 0.0% 97.6 2s Cutting planes: Zero half: 23 Explored 102 nodes (26595 simplex iterations) in 2.38 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 19:02:23 2012 Optimize a model with 1391 rows, 931 columns and 4016 nonzeros Presolve removed 157 rows and 157 columns Presolve time: 0.00s Presolved: 1234 rows, 774 columns, 3702 nonzeros Variable types: 0 continuous, 774 integer (774 binary) Root relaxation: objective 0.000000e+00, 163 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 (651 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 19:02:23 2012 Optimize a model with 2008 rows, 1088 columns and 6024 nonzeros Presolve time: 0.01s Presolved: 2008 rows, 1088 columns, 6024 nonzeros Variable types: 0 continuous, 1088 integer (1088 binary) Root relaxation: objective 0.000000e+00, 378 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 0 306 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3726 simplex iterations) in 0.32 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