current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:01 2012 Optimize a model with 30057 rows, 9756 columns and 99076 nonzeros Presolve time: 0.14s Presolved: 30057 rows, 9756 columns, 99076 nonzeros Variable types: 0 continuous, 9756 integer (9756 binary) Root relaxation: objective 0.000000e+00, 381 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 (381 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:02 2012 Optimize a model with 15097 rows, 5098 columns and 49538 nonzeros Presolve time: 0.08s Presolved: 15097 rows, 5098 columns, 49538 nonzeros Variable types: 0 continuous, 5098 integer (5098 binary) Root relaxation: objective 0.000000e+00, 367 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 0.11 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:02 2012 Optimize a model with 7617 rows, 2769 columns and 24769 nonzeros Presolve time: 0.03s Presolved: 7617 rows, 2769 columns, 24769 nonzeros Variable types: 0 continuous, 2769 integer (2769 binary) Root relaxation: objective 0.000000e+00, 277 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 (520 simplex iterations) in 0.04 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 18:38:02 2012 Optimize a model with 3657 rows, 1536 columns and 11656 nonzeros Presolve time: 0.01s Presolved: 3657 rows, 1536 columns, 11656 nonzeros Variable types: 0 continuous, 1536 integer (1536 binary) Root relaxation: objective 0.000000e+00, 315 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 (565 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 18:38:02 2012 Optimize a model with 1897 rows, 988 columns and 5828 nonzeros Presolve time: 0.01s Presolved: 1897 rows, 988 columns, 5828 nonzeros Variable types: 0 continuous, 988 integer (988 binary) Root relaxation: objective 0.000000e+00, 330 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 95 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2106 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 18:38:02 2012 Optimize a model with 1017 rows, 714 columns and 2914 nonzeros Presolve removed 137 rows and 137 columns Presolve time: 0.00s Presolved: 880 rows, 577 columns, 2640 nonzeros Variable types: 0 continuous, 577 integer (577 binary) Root relaxation: objective 0.000000e+00, 155 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 0 137 - 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 18:38:02 2012 Optimize a model with 1457 rows, 851 columns and 4371 nonzeros Presolve time: 0.00s Presolved: 1457 rows, 851 columns, 4371 nonzeros Variable types: 0 continuous, 851 integer (851 binary) Root relaxation: objective 0.000000e+00, 325 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 0 212 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 1s 0 0 0.00000 0 349 - 0.00000 - - 1s 0 2 0.00000 0 349 - 0.00000 - - 1s Cutting planes: Zero half: 13 Explored 7 nodes (14825 simplex iterations) in 1.33 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4