current bounds on the number of colors: 0 -- 147 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:40 2012 Optimize a model with 38618 rows, 11258 columns and 126144 nonzeros Presolve time: 0.15s Presolved: 38618 rows, 11258 columns, 126144 nonzeros Variable types: 0 continuous, 11258 integer (11258 binary) Root relaxation: objective 0.000000e+00, 508 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 (807 simplex iterations) in 0.24 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 -- 73 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:41 2012 Optimize a model with 19119 rows, 5819 columns and 62208 nonzeros Presolve time: 0.10s Presolved: 19119 rows, 5819 columns, 62208 nonzeros Variable types: 0 continuous, 5819 integer (5819 binary) Root relaxation: objective 0.000000e+00, 418 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 (706 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:42 2012 Optimize a model with 9633 rows, 3173 columns and 31104 nonzeros Presolve time: 0.04s Presolved: 9633 rows, 3173 columns, 31104 nonzeros Variable types: 0 continuous, 3173 integer (3173 binary) Root relaxation: objective 0.000000e+00, 296 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 (680 simplex iterations) in 0.06 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:42 2012 Optimize a model with 4890 rows, 1850 columns and 15552 nonzeros Presolve time: 0.01s Presolved: 4890 rows, 1850 columns, 15552 nonzeros Variable types: 0 continuous, 1850 integer (1850 binary) Root relaxation: objective 0.000000e+00, 314 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 (576 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 18:44:42 2012 Optimize a model with 2255 rows, 1115 columns and 6912 nonzeros Presolve time: 0.01s Presolved: 2255 rows, 1115 columns, 6912 nonzeros Variable types: 0 continuous, 1115 integer (1115 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 0 257 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1709 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 18:44:42 2012 Optimize a model with 1201 rows, 821 columns and 3456 nonzeros Presolve removed 147 rows and 147 columns Presolve time: 0.00s Presolved: 1054 rows, 674 columns, 3162 nonzeros Variable types: 0 continuous, 674 integer (674 binary) Root relaxation: objective 0.000000e+00, 154 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 0 147 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (631 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 18:44:42 2012 Optimize a model with 1728 rows, 968 columns and 5184 nonzeros Presolve time: 0.00s Presolved: 1728 rows, 968 columns, 5184 nonzeros Variable types: 0 continuous, 968 integer (968 binary) Root relaxation: objective 0.000000e+00, 332 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 0 288 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 374 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 366 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 1s 0 0 0.00000 0 264 - 0.00000 - - 1s 0 0 0.00000 0 381 - 0.00000 - - 1s 0 0 0.00000 0 324 - 0.00000 - - 1s 0 2 0.00000 0 324 - 0.00000 - - 1s Cutting planes: Zero half: 19 Explored 3 nodes (18522 simplex iterations) in 1.91 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