I. *_*Ali 3 frama-c alt-ergo why3
我正在尝试使用 Frama-c 测试一个函数:
/*@
ensures \result >= x && \result >= y;
ensures \result == x || \result == y;
*/
int max( int x, int y){
return (x>y) ? x : y;
}
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安装完所有要求后:OPAM、why3、alt-ergo 每当我执行frama-c -wp fct.c我收到:
[kernel] Parsing fct.c (with preprocessing)
[wp] Warning: Missing RTE guards
[wp] User Error: Prover 'alt-ergo' not found in why3.conf
[wp] Goal typed_max_ensures : not tried
[wp] Goal typed_max_ensures_2 : not tried
[wp] User Error: Deferred error message was emitted during execution.
See above messages for more information.
[kernel] Plug-in wp aborted: invalid user input.
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正如在Frama-C 的安装说明中提到的,why3必须通过why3 config --detect命令明确地配置为检查可用的证明器(请注意,根据您安装的 Why3 的确切版本,您也可以why3 config --full-config改用)。您应该看到如下输出:
Found prover Alt-Ergo version 2.0.0, OK.
... possibly other provers if you have installed them
Save config to /PATH/TO/HOME/.why3.conf
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之后,您将能够在 Frama-C/WP 中使用证明程序
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