--- Job qnet1 Start 08/21/08 11:44:56 GAMS Rev 227 Copyright (C) 1987-2008 GAMS Development. All rights reserved Licensee: Stefan Vigerske G071106/0001CB-LNX Humboldt University Berlin, Numerical Mathematics DC5918 --- Starting compilation --- qnet1.gms(106) 2 Mb --- GDXin=/home/stefan/work/gams/models/LINlib/qnet1.gdx --- qnet1.gms(148) 3 Mb --- Starting execution: elapsed 0:00:00.037 --- qnet1.gms(123) 4 Mb --- Generating MIP model m --- qnet1.gms(124) 4 Mb --- 504 rows 1,542 columns 4,747 non-zeroes --- 1,417 discrete-columns --- qnet1.gms(124) 4 Mb --- Executing COINCBC: elapsed 0:00:00.059 GAMS/CoinCbc 2.0 LP/MIP Solver written by J. Forrest Problem statistics: 1541 columns and 503 rows. 1417 variables have integrality restrictions. Calling CBC main solution routine... Coin Cbc and Clp Solver version 2.00.00, build Mar 20 2008 command line - GAMS/CBC -solve -quit Continuous objective value is 14274.1 - 0.02 seconds 0 fixed, 0 tightened bounds, 15 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 15 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 6 strengthened rows, 0 substitutions processed model has 378 rows, 1417 columns (1417 integer) and 4310 elements Full problem 379 rows 1417 columns, reduced to 16 rows 81 columns Pass 1: obj. 0.00000 --> up = 0 , down = 0 -- rand = 0 ( 22) - solution found of 14640.6 - cleaned solution of 17672.4 Before mini branch and bound, 1364 integers at bound fixed and 0 continuous of which 1 were internal integer and 0 internal continuous Full problem 378 rows 1417 columns, reduced to 28 rows 24 columns Mini branch and bound did not improve solution (0.09 seconds) Round again with cutoff of 17332.6 Reduced cost fixing fixed 20 variables on pass 2 Full problem 379 rows 1417 columns, reduced to 17 rows 77 columns Pass 2: obj. 0.00000 --> up = 0 , down = 0 -- rand = 0 ( 23) - solution found of 14640.6 - mini branch and bound could not fix general integers No solution found this major pass Before mini branch and bound, 1364 integers at bound fixed and 0 continuous of which 1 were internal integer and 0 internal continuous Full problem 378 rows 1417 columns, reduced to 28 rows 24 columns Mini branch and bound did not improve solution (0.14 seconds) After 0.14 seconds - Feasibility pump exiting - took 0.14 seconds Integer solution of 17672.4 found by feasibility pump after 0 iterations and 0 nodes (0.15 seconds) Full problem 378 rows 1417 columns, reduced to 2 rows 4 columns 68 added rows had average density of 18.0294 At root node, 68 cuts changed objective from 14274.1 to 15793.4 in 36 passes Cut generator 0 (Probing) - 2 row cuts (1 active), 3 column cuts in 0.984 seconds - new frequency is 1 Cut generator 1 (Gomory) - 86 row cuts (1 active), 0 column cuts in 0.272 seconds - new frequency is 1 Cut generator 2 (Knapsack) - 0 row cuts (0 active), 0 column cuts in 0.148 seconds - new frequency is -100 Cut generator 3 (Clique) - 0 row cuts (0 active), 0 column cuts in 0.000 seconds - new frequency is -100 Cut generator 4 (MixedIntegerRounding2) - 155 row cuts (40 active), 0 column cuts in 0.028 seconds - new frequency is 1 Cut generator 5 (FlowCover) - 0 row cuts (0 active), 0 column cuts in 0.000 seconds - new frequency is -100 Cut generator 6 (TwoMirCuts) - 107 row cuts (5 active), 0 column cuts in 0.060 seconds - new frequency is -100 After 0 nodes, 1 on tree, 17672.4 best solution, best possible 15793.4 (3.84 seconds) Search completed - best objective 16029.692681, took 5656 iterations and 30 nodes (6.75 seconds) Strong branching done 510 times (22828 iterations), fathomed 3 nodes and fixed 12 variables Maximum depth 6, 4100 variables fixed on reduced cost Cuts at root node changed objective from 14274.1 to 15793.4 Probing was tried 60 times and created 94 cuts of which 17 were active after adding rounds of cuts (1.052 seconds) Gomory was tried 60 times and created 101 cuts of which 4 were active after adding rounds of cuts (0.320 seconds) Knapsack was tried 36 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.148 seconds) Clique was tried 36 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.000 seconds) MixedIntegerRounding2 was tried 60 times and created 191 cuts of which 55 were active after adding rounds of cuts (0.040 seconds) FlowCover was tried 1 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.000 seconds) TwoMirCuts was tried 36 times and created 107 cuts of which 5 were active after adding rounds of cuts (0.060 seconds) Result - Finished objective 16029.692681 after 30 nodes and 5656 iterations - took 7.08 seconds (total time 7.10) Total time 7.12 Solved to optimality. Writing solution. Objective: 16029.7 Time: 7.13 s --- Restarting execution --- qnet1.gms(124) 0 Mb --- Reading solution for model m *** Status: Normal completion --- Job qnet1.gms Stop 08/21/08 11:45:03 elapsed 0:00:07.248