current bounds on the number of colors: 0 -- 141 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:40 2012 Optimize a model with 36261 rows, 10386 columns and 118230 nonzeros Presolve time: 0.14s Presolved: 36261 rows, 10386 columns, 118230 nonzeros Variable types: 0 continuous, 10386 integer (10386 binary) Root relaxation: objective 0.000000e+00, 449 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 (743 simplex iterations) in 0.22 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:41 2012 Optimize a model with 18201 rows, 5451 columns and 59115 nonzeros Presolve time: 0.09s Presolved: 18201 rows, 5451 columns, 59115 nonzeros Variable types: 0 continuous, 5451 integer (5451 binary) Root relaxation: objective 0.000000e+00, 346 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 0.13 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:41 2012 Optimize a model with 8913 rows, 2913 columns and 28713 nonzeros Presolve time: 0.03s Presolved: 8913 rows, 2913 columns, 28713 nonzeros Variable types: 0 continuous, 2913 integer (2913 binary) Root relaxation: objective 0.000000e+00, 286 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 (511 simplex iterations) in 0.05 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 18:40:41 2012 Optimize a model with 4269 rows, 1644 columns and 13512 nonzeros Presolve time: 0.01s Presolved: 4269 rows, 1644 columns, 13512 nonzeros Variable types: 0 continuous, 1644 integer (1644 binary) Root relaxation: objective 0.000000e+00, 322 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 (561 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:41 2012 Optimize a model with 2205 rows, 1080 columns and 6756 nonzeros Presolve time: 0.01s Presolved: 2205 rows, 1080 columns, 6756 nonzeros Variable types: 0 continuous, 1080 integer (1080 binary) Root relaxation: objective 0.000000e+00, 337 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 0 254 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Zero half: 4 Explored 0 nodes (6165 simplex iterations) in 0.38 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 18:40:42 2012 Optimize a model with 1173 rows, 798 columns and 3378 nonzeros Presolve removed 141 rows and 141 columns Presolve time: 0.00s Presolved: 1032 rows, 657 columns, 3096 nonzeros Variable types: 0 continuous, 657 integer (657 binary) Root relaxation: objective 0.000000e+00, 146 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 0 141 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (594 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 18:40:42 2012 Optimize a model with 1689 rows, 939 columns and 5067 nonzeros Presolve time: 0.00s Presolved: 1689 rows, 939 columns, 5067 nonzeros Variable types: 0 continuous, 939 integer (939 binary) Root relaxation: objective 0.000000e+00, 342 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 0 280 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 299 - 0.00000 - - 0s 0 0 0.00000 0 375 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Zero half: 328 Explored 0 nodes (4869 simplex iterations) in 0.42 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