current bounds on the number of colors: 0 -- 165 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:59:41 2012 Optimize a model with 54941 rows, 14198 columns and 177858 nonzeros Presolve time: 0.16s Presolved: 54941 rows, 14198 columns, 177858 nonzeros Variable types: 0 continuous, 14198 integer (14198 binary) Root relaxation: objective 0.000000e+00, 608 iterations, 0.05 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 (972 simplex iterations) in 0.29 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:59:42 2012 Optimize a model with 27553 rows, 7433 columns and 88929 nonzeros Presolve time: 0.14s Presolved: 27553 rows, 7433 columns, 88929 nonzeros Variable types: 0 continuous, 7433 integer (7433 binary) Root relaxation: objective 0.000000e+00, 543 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 (876 simplex iterations) in 0.21 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 19:59:43 2012 Optimize a model with 13525 rows, 3968 columns and 43380 nonzeros Presolve time: 0.05s Presolved: 13525 rows, 3968 columns, 43380 nonzeros Variable types: 0 continuous, 3968 integer (3968 binary) Root relaxation: objective 0.000000e+00, 341 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 (639 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 19:59:43 2012 Optimize a model with 6845 rows, 2318 columns and 21690 nonzeros Presolve time: 0.02s Presolved: 6845 rows, 2318 columns, 21690 nonzeros Variable types: 0 continuous, 2318 integer (2318 binary) Root relaxation: objective 0.000000e+00, 352 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 (626 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 19:59:43 2012 Optimize a model with 3505 rows, 1493 columns and 10845 nonzeros Presolve time: 0.01s Presolved: 3505 rows, 1493 columns, 10845 nonzeros Variable types: 0 continuous, 1493 integer (1493 binary) Root relaxation: objective 0.000000e+00, 364 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 (2181 simplex iterations) in 0.11 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 19:59:44 2012 Optimize a model with 1501 rows, 998 columns and 4338 nonzeros Presolve removed 165 rows and 165 columns Presolve time: 0.00s Presolved: 1336 rows, 833 columns, 4008 nonzeros Variable types: 0 continuous, 833 integer (833 binary) Root relaxation: objective 0.000000e+00, 174 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 0 165 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (694 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 19:59:44 2012 Optimize a model with 2169 rows, 1163 columns and 6507 nonzeros Presolve time: 0.01s Presolved: 2169 rows, 1163 columns, 6507 nonzeros Variable types: 0 continuous, 1163 integer (1163 binary) Root relaxation: objective 0.000000e+00, 376 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 0 330 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3765 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 - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:59:44 2012 Optimize a model with 2837 rows, 1328 columns and 8676 nonzeros Presolve time: 0.01s Presolved: 2837 rows, 1328 columns, 8676 nonzeros Variable types: 0 continuous, 1328 integer (1328 binary) Root relaxation: objective 0.000000e+00, 382 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 0 302 - 0.00000 - - 0s 0 0 0.00000 0 327 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 367 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 1s 0 0 0.00000 0 380 - 0.00000 - - 1s 0 0 0.00000 0 389 - 0.00000 - - 1s 0 0 0.00000 0 389 - 0.00000 - - 2s 0 2 0.00000 0 389 - 0.00000 - - 2s 703 71 0.00000 3 306 - 0.00000 - 72.9 5s 711 77 0.00000 17 382 - 0.00000 - 72.1 10s 717 81 0.00000 12 264 - 0.00000 - 71.5 15s 1010 36 infeasible 22 - 0.00000 - 141 20s * 1084 2 23 0.0000000 0.00000 0.0% 142 20s Cutting planes: Gomory: 1 Zero half: 29 Explored 1085 nodes (172935 simplex iterations) in 20.66 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