current bounds on the number of colors: 0 -- 166 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:32 2012 Optimize a model with 57353 rows, 14467 columns and 185339 nonzeros Presolve time: 0.17s Presolved: 57353 rows, 14467 columns, 185339 nonzeros Variable types: 0 continuous, 14467 integer (14467 binary) Root relaxation: objective 0.000000e+00, 615 iterations, 0.06 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 (988 simplex iterations) in 0.32 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:33 2012 Optimize a model with 28415 rows, 7495 columns and 91553 nonzeros Presolve time: 0.14s Presolved: 28415 rows, 7495 columns, 91553 nonzeros Variable types: 0 continuous, 7495 integer (7495 binary) Root relaxation: objective 0.000000e+00, 507 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 (861 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:33 2012 Optimize a model with 13946 rows, 4009 columns and 44660 nonzeros Presolve time: 0.05s Presolved: 13946 rows, 4009 columns, 44660 nonzeros Variable types: 0 continuous, 4009 integer (4009 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 (625 simplex iterations) in 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:33 2012 Optimize a model with 7056 rows, 2349 columns and 22330 nonzeros Presolve time: 0.02s Presolved: 7056 rows, 2349 columns, 22330 nonzeros Variable types: 0 continuous, 2349 integer (2349 binary) Root relaxation: objective 0.000000e+00, 349 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 (643 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:34 2012 Optimize a model with 3611 rows, 1519 columns and 11165 nonzeros Presolve time: 0.01s Presolved: 3611 rows, 1519 columns, 11165 nonzeros Variable types: 0 continuous, 1519 integer (1519 binary) Root relaxation: objective 0.000000e+00, 369 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 (1707 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:34 2012 Optimize a model with 1544 rows, 1021 columns and 4466 nonzeros Presolve removed 166 rows and 166 columns Presolve time: 0.00s Presolved: 1378 rows, 855 columns, 4134 nonzeros Variable types: 0 continuous, 855 integer (855 binary) Root relaxation: objective 0.000000e+00, 177 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 0 166 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (711 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:34 2012 Optimize a model with 2233 rows, 1187 columns and 6699 nonzeros Presolve time: 0.01s Presolved: 2233 rows, 1187 columns, 6699 nonzeros Variable types: 0 continuous, 1187 integer (1187 binary) Root relaxation: objective 0.000000e+00, 372 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 0 236 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (6882 simplex iterations) in 0.59 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:34 2012 Optimize a model with 2922 rows, 1353 columns and 8932 nonzeros Presolve time: 0.01s Presolved: 2922 rows, 1353 columns, 8932 nonzeros Variable types: 0 continuous, 1353 integer (1353 binary) Root relaxation: objective 0.000000e+00, 389 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 263 - 0.00000 - - 0s 0 0 0.00000 0 347 - 0.00000 - - 0s 0 0 0.00000 0 237 - 0.00000 - - 1s 0 0 0.00000 0 368 - 0.00000 - - 1s 0 0 0.00000 0 374 - 0.00000 - - 1s 0 0 0.00000 0 374 - 0.00000 - - 2s 0 2 0.00000 0 374 - 0.00000 - - 2s 701 107 0.00000 15 314 - 0.00000 - 78.3 5s 709 112 0.00000 19 304 - 0.00000 - 77.4 10s 715 116 0.00000 20 373 - 0.00000 - 76.8 15s 1290 73 infeasible 28 - 0.00000 - 131 20s 2012 141 0.00000 41 284 - 0.00000 - 133 25s * 2168 2 36 0.0000000 0.00000 0.0% 133 26s Cutting planes: Gomory: 2 Zero half: 4 Explored 2169 nodes (308592 simplex iterations) in 26.07 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% optimal solution found: number of colors: 4