current bounds on the number of colors: 0 -- 159 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:00 2012 Optimize a model with 48586 rows, 13174 columns and 157842 nonzeros Presolve time: 0.16s Presolved: 48586 rows, 13174 columns, 157842 nonzeros Variable types: 0 continuous, 13174 integer (13174 binary) Root relaxation: objective 0.000000e+00, 533 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 (886 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:01 2012 Optimize a model with 24066 rows, 6814 columns and 77922 nonzeros Presolve time: 0.13s Presolved: 24066 rows, 6814 columns, 77922 nonzeros Variable types: 0 continuous, 6814 integer (6814 binary) Root relaxation: objective 0.000000e+00, 481 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 (826 simplex iterations) in 0.18 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 19:13:02 2012 Optimize a model with 11806 rows, 3634 columns and 37962 nonzeros Presolve time: 0.06s Presolved: 11806 rows, 3634 columns, 37962 nonzeros Variable types: 0 continuous, 3634 integer (3634 binary) Root relaxation: objective 0.000000e+00, 326 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 (588 simplex iterations) in 0.08 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 19:13:02 2012 Optimize a model with 5676 rows, 2044 columns and 17982 nonzeros Presolve time: 0.02s Presolved: 5676 rows, 2044 columns, 17982 nonzeros Variable types: 0 continuous, 2044 integer (2044 binary) Root relaxation: objective 0.000000e+00, 335 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 (613 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 19:13:02 2012 Optimize a model with 2611 rows, 1249 columns and 7992 nonzeros Presolve time: 0.01s Presolved: 2611 rows, 1249 columns, 7992 nonzeros Variable types: 0 continuous, 1249 integer (1249 binary) Root relaxation: objective 0.000000e+00, 370 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 389 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 1s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 304 - 0.00000 - - 1s 0 0 0.00000 0 321 - 0.00000 - - 2s 0 0 0.00000 0 321 - 0.00000 - - 2s 0 2 0.00000 0 321 - 0.00000 - - 2s * 324 0 22 0.0000000 0.00000 0.0% 69.4 3s Cutting planes: Zero half: 36 Explored 325 nodes (45470 simplex iterations) in 3.42 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 19:13:06 2012 Optimize a model with 1385 rows, 931 columns and 3996 nonzeros Presolve removed 159 rows and 159 columns Presolve time: 0.00s Presolved: 1226 rows, 772 columns, 3678 nonzeros Variable types: 0 continuous, 772 integer (772 binary) Root relaxation: objective 0.000000e+00, 170 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 0 159 - 0.00000 - - 0s Explored 0 nodes (683 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 19:13:06 2012 Optimize a model with 1998 rows, 1090 columns and 5994 nonzeros Presolve time: 0.01s Presolved: 1998 rows, 1090 columns, 5994 nonzeros Variable types: 0 continuous, 1090 integer (1090 binary) Root relaxation: objective 0.000000e+00, 368 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3727 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