alt-ergo

问题 The following SMT-LIB code runs without problems in Z3, MathSat and CVC4 but it is not running in Alt-Ergo, please let me know what happens, many thanks: (set-logic QF_UF) (set-option :incremental true) (set-option :produce-models true) (declare-fun m () Bool) (declare-fun p () Bool) (declare-fun b () Bool) (declare-fun c () Bool) (declare-fun r () Bool) (declare-fun al () Bool) (declare-fun all () Bool) (declare-fun la () Bool) (declare-fun lal () Bool) (declare-fun g () Bool) (declare-fun a

问题 Suppose we have the following C annotated code: #define L 3 int a[L] = {0}; /*@ requires \valid(a+(0..(L - 1))); ensures \forall int j; 0 <= j < L ==> (a[j] == j); */ int main() { int i = 0; /*@ loop assigns i, a[0..(i-1)]; loop invariant inv1: 0 <= i <= L; loop invariant inv2: \forall int k; 0 <= k < i ==> a[k] == k; */ while (i < L) { a[i] = i; i++; } /*@ assert final_progress: \forall int k; 0 < k < L ==> a[k] == a[k-1] + 1; assert final_c: a[2] == a[1] - 1; */ return 0; } Why Alt-Ergo/Z3