[Cbc] Different Results 32bit and 64bit compiles of CBC/CLP

[Christoph Cullmann]

Hi,

with the attached ILP, I get different Results on 32bit and 64bit
compiles on Linux, even presolving already differs.
CBC version 2.3, updated 1-2 weeks ago.
(Compiler is GCC, 4.3, -O1)

64bit:

clpsolve: Progress: [10:16:40]: Coin0506I Presolve 1 (-75) rows, 2
(-102) columns and 2 (-228) elements

clpsolve: Progress: [10:16:40]: Clp0006I 0 Obj -3.67132e+12 Primal inf
0.0999999 (1) Dual inf 3.635e+08 (1)

clpsolve: Progress: [10:16:40]: Clp0006I 2 Obj -3.67135e+12

clpsolve: Progress: [10:16:40]: Clp0000I Optimal - objective value
-3.67135e+12

clpsolve: Progress: [10:16:40]: Coin0511I After Postsolve, objective
-3.67135e+12, infeasibilities - dual 0 (0), primal 0 (0)

clpsolve: Progress: [10:16:40]: Clp0032I Optimal objective
-3.671353404e+12 - 2 iterations time 0.002, Presolve 0.00

clpsolve: Note: value of objective function: 3671353403594


32bit:

clpsolve: Progress: [10:16:46]: Coin0506I Presolve 2 (-74) rows, 4
(-100) columns and 6 (-224) elements

clpsolve: Progress: [10:16:46]: Clp0006I 0 Obj -3.635e+12 Primal inf 11
(2) Dual inf 2.41393e+10 (4)

clpsolve: Progress: [10:16:46]: Clp0006I 2 Obj -3.67135e+12

clpsolve: Progress: [10:16:46]: Clp0000I Optimal - objective value
-3.67135e+12

clpsolve: Progress: [10:16:46]: Coin0511I After Postsolve, objective
-3.67135e+12, infeasibilities - dual -6.00517e-06 (2), primal 0 (0)

clpsolve: Progress: [10:16:46]: Coin0512I Presolved model was optimal,
full model needs cleaning up

clpsolve: Progress: [10:16:46]: Clp0006I 0 Obj -3.67135e+12

This message was repeated once.

clpsolve: Progress: [10:16:46]: Clp0000I Optimal - objective value
-3.67135e+12

clpsolve: Progress: [10:16:46]: Clp0032I Optimal objective
-3.671353404e+12 - 2 iterations time 0.002, Presolve -0.00

clpsolve: Progress: [10:16:46]: Coin0506I Presolve 0 (-76) rows, 0
(-104) columns and 0 (-230) elements

clpsolve: Note: value of objective function: 3671353403355


Greetings
Christoph

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-------------------------------------- Christoph Cullmann ---------
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