current bounds on the number of colors: 0 -- 129 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:02 2012 Optimize a model with 28801 rows, 8704 columns and 94272 nonzeros Presolve time: 0.14s Presolved: 28801 rows, 8704 columns, 94272 nonzeros Variable types: 0 continuous, 8704 integer (8704 binary) Root relaxation: objective 0.000000e+00, 428 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 (682 simplex iterations) in 0.20 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 -- 64 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:02 2012 Optimize a model with 14465 rows, 4576 columns and 47136 nonzeros Presolve time: 0.07s Presolved: 14465 rows, 4576 columns, 47136 nonzeros Variable types: 0 continuous, 4576 integer (4576 binary) Root relaxation: objective 0.000000e+00, 357 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 (598 simplex iterations) in 0.10 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:02 2012 Optimize a model with 7297 rows, 2512 columns and 23568 nonzeros Presolve time: 0.03s Presolved: 7297 rows, 2512 columns, 23568 nonzeros Variable types: 0 continuous, 2512 integer (2512 binary) Root relaxation: objective 0.000000e+00, 267 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 (484 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:02 2012 Optimize a model with 3713 rows, 1480 columns and 11784 nonzeros Presolve time: 0.01s Presolved: 3713 rows, 1480 columns, 11784 nonzeros Variable types: 0 continuous, 1480 integer (1480 binary) Root relaxation: objective 0.000000e+00, 282 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 (492 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 18:34:03 2012 Optimize a model with 1921 rows, 964 columns and 5892 nonzeros Presolve time: 0.00s Presolved: 1921 rows, 964 columns, 5892 nonzeros Variable types: 0 continuous, 964 integer (964 binary) Root relaxation: objective 0.000000e+00, 304 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 0 185 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2241 simplex iterations) in 0.10 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 18:34:03 2012 Optimize a model with 1025 rows, 706 columns and 2946 nonzeros Presolve removed 129 rows and 129 columns Presolve time: 0.00s Presolved: 896 rows, 577 columns, 2688 nonzeros Variable types: 0 continuous, 577 integer (577 binary) Root relaxation: objective 0.000000e+00, 138 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 0 129 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (541 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 18:34:03 2012 Optimize a model with 1473 rows, 835 columns and 4419 nonzeros Presolve time: 0.00s Presolved: 1473 rows, 835 columns, 4419 nonzeros Variable types: 0 continuous, 835 integer (835 binary) Root relaxation: objective 0.000000e+00, 304 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 0 246 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 164 Explored 0 nodes (4704 simplex iterations) in 0.36 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