current bounds on the number of colors: 0 -- 154 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:30 2012 Optimize a model with 49588 rows, 12500 columns and 160160 nonzeros Presolve time: 0.16s Presolved: 49588 rows, 12500 columns, 160160 nonzeros Variable types: 0 continuous, 12500 integer (12500 binary) Root relaxation: objective 0.000000e+00, 507 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 (816 simplex iterations) in 0.27 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:31 2012 Optimize a model with 24550 rows, 6494 columns and 79040 nonzeros Presolve time: 0.13s Presolved: 24550 rows, 6494 columns, 79040 nonzeros Variable types: 0 continuous, 6494 integer (6494 binary) Root relaxation: objective 0.000000e+00, 395 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 (690 simplex iterations) in 0.17 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:32 2012 Optimize a model with 12352 rows, 3568 columns and 39520 nonzeros Presolve time: 0.05s Presolved: 12352 rows, 3568 columns, 39520 nonzeros Variable types: 0 continuous, 3568 integer (3568 binary) Root relaxation: objective 0.000000e+00, 321 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 (608 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:32 2012 Optimize a model with 5932 rows, 2028 columns and 18720 nonzeros Presolve time: 0.02s Presolved: 5932 rows, 2028 columns, 18720 nonzeros Variable types: 0 continuous, 2028 integer (2028 binary) Root relaxation: objective 0.000000e+00, 336 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 (825 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:52:32 2012 Optimize a model with 2722 rows, 1258 columns and 8320 nonzeros Presolve time: 0.01s Presolved: 2722 rows, 1258 columns, 8320 nonzeros Variable types: 0 continuous, 1258 integer (1258 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 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 323 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 0s 0 0 0.00000 0 365 - 0.00000 - - 0s 0 0 0.00000 0 365 - 0.00000 - - 1s 0 2 0.00000 0 365 - 0.00000 - - 1s 605 68 0.00000 5 346 - 0.00000 - 74.4 5s 612 72 0.00000 8 272 - 0.00000 - 73.5 10s 983 121 0.00000 21 258 - 0.00000 - 124 15s 1623 155 infeasible 21 - 0.00000 - 136 20s 2225 127 0.00000 18 242 - 0.00000 - 144 25s 2891 99 0.00000 21 287 - 0.00000 - 146 30s 3528 60 infeasible 21 - 0.00000 - 147 35s * 3589 0 23 0.0000000 0.00000 0.0% 148 35s Cutting planes: Gomory: 1 Clique: 2 Zero half: 20 Explored 3590 nodes (542704 simplex iterations) in 35.58 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 18:53:08 2012 Optimize a model with 1438 rows, 950 columns and 4160 nonzeros Presolve removed 154 rows and 154 columns Presolve time: 0.00s Presolved: 1284 rows, 796 columns, 3852 nonzeros Variable types: 0 continuous, 796 integer (796 binary) Root relaxation: objective 0.000000e+00, 167 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 0 154 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (665 simplex iterations) in 0.02 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 18:53:08 2012 Optimize a model with 2080 rows, 1104 columns and 6240 nonzeros Presolve time: 0.01s Presolved: 2080 rows, 1104 columns, 6240 nonzeros Variable types: 0 continuous, 1104 integer (1104 binary) Root relaxation: objective 0.000000e+00, 336 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 0 300 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 6 Zero half: 601 Explored 0 nodes (6789 simplex iterations) in 0.62 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