current bounds on the number of colors: 0 -- 144 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:37 2012 Optimize a model with 37728 rows, 10890 columns and 123120 nonzeros Presolve time: 0.15s Presolved: 37728 rows, 10890 columns, 123120 nonzeros Variable types: 0 continuous, 10890 integer (10890 binary) Root relaxation: objective 0.000000e+00, 500 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 (789 simplex iterations) in 0.23 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 -- 72 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:38 2012 Optimize a model with 18936 rows, 5706 columns and 61560 nonzeros Presolve time: 0.10s Presolved: 18936 rows, 5706 columns, 61560 nonzeros Variable types: 0 continuous, 5706 integer (5706 binary) Root relaxation: objective 0.000000e+00, 384 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 (649 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 18:42:38 2012 Optimize a model with 9540 rows, 3114 columns and 30780 nonzeros Presolve time: 0.04s Presolved: 9540 rows, 3114 columns, 30780 nonzeros Variable types: 0 continuous, 3114 integer (3114 binary) Root relaxation: objective 0.000000e+00, 308 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 (633 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 18:42:39 2012 Optimize a model with 4842 rows, 1818 columns and 15390 nonzeros Presolve time: 0.01s Presolved: 4842 rows, 1818 columns, 15390 nonzeros Variable types: 0 continuous, 1818 integer (1818 binary) Root relaxation: objective 0.000000e+00, 306 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 (701 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 18:42:39 2012 Optimize a model with 2232 rows, 1098 columns and 6840 nonzeros Presolve time: 0.01s Presolved: 2232 rows, 1098 columns, 6840 nonzeros Variable types: 0 continuous, 1098 integer (1098 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 0 232 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 17 Clique: 28 Zero half: 40 Explored 0 nodes (3430 simplex iterations) in 0.25 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 18:42:39 2012 Optimize a model with 1188 rows, 810 columns and 3420 nonzeros Presolve removed 144 rows and 144 columns Presolve time: 0.00s Presolved: 1044 rows, 666 columns, 3132 nonzeros Variable types: 0 continuous, 666 integer (666 binary) Root relaxation: objective 0.000000e+00, 149 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 0 144 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (604 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 18:42:39 2012 Optimize a model with 1710 rows, 954 columns and 5130 nonzeros Presolve time: 0.00s Presolved: 1710 rows, 954 columns, 5130 nonzeros Variable types: 0 continuous, 954 integer (954 binary) Root relaxation: objective 0.000000e+00, 317 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 0 274 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 253 Explored 0 nodes (5362 simplex iterations) in 0.49 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