current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:04 2012 Optimize a model with 29921 rows, 9754 columns and 98668 nonzeros Presolve time: 0.14s Presolved: 29921 rows, 9754 columns, 98668 nonzeros Variable types: 0 continuous, 9754 integer (9754 binary) Root relaxation: objective 0.000000e+00, 430 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 (703 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:05 2012 Optimize a model with 15029 rows, 5096 columns and 49334 nonzeros Presolve time: 0.08s Presolved: 15029 rows, 5096 columns, 49334 nonzeros Variable types: 0 continuous, 5096 integer (5096 binary) Root relaxation: objective 0.000000e+00, 339 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 (563 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 18:38:05 2012 Optimize a model with 7583 rows, 2767 columns and 24667 nonzeros Presolve time: 0.03s Presolved: 7583 rows, 2767 columns, 24667 nonzeros Variable types: 0 continuous, 2767 integer (2767 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 (500 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 18:38:06 2012 Optimize a model with 3641 rows, 1534 columns and 11608 nonzeros Presolve time: 0.01s Presolved: 3641 rows, 1534 columns, 11608 nonzeros Variable types: 0 continuous, 1534 integer (1534 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 (535 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 18:38:06 2012 Optimize a model with 1889 rows, 986 columns and 5804 nonzeros Presolve time: 0.00s Presolved: 1889 rows, 986 columns, 5804 nonzeros Variable types: 0 continuous, 986 integer (986 binary) Root relaxation: objective 0.000000e+00, 307 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 0 135 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2214 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 18:38:06 2012 Optimize a model with 1013 rows, 712 columns and 2902 nonzeros Presolve removed 137 rows and 137 columns Presolve time: 0.00s Presolved: 876 rows, 575 columns, 2628 nonzeros Variable types: 0 continuous, 575 integer (575 binary) Root relaxation: objective 0.000000e+00, 147 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 (570 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 18:38:06 2012 Optimize a model with 1451 rows, 849 columns and 4353 nonzeros Presolve time: 0.00s Presolved: 1451 rows, 849 columns, 4353 nonzeros Variable types: 0 continuous, 849 integer (849 binary) Root relaxation: objective 0.000000e+00, 307 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 0 262 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 1s 0 0 0.00000 0 336 - 0.00000 - - 1s 0 0 0.00000 0 336 - 0.00000 - - 1s 0 2 0.00000 0 336 - 0.00000 - - 1s Cutting planes: Zero half: 27 Explored 13 nodes (17462 simplex iterations) in 1.47 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