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test: extent_separation.cpp's wrong copy fails at once #112

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test: extent_separation.cpp's wrong copy fails at once #112

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5 changes: 4 additions & 1 deletion clang/test/Verify/suite/extent_separation.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,9 @@ void copy(const int *a, int *out, int n)
// VCR-NEXT: a
// VCR-NEXT: post

// A copy that writes zeros: its invariant fails where a holds anything else,
// which the solver finds at once (a reversed copy took 30 to 60 s, and on a
// slow runner timed out).
void wrong_copy(const int *a, int *out, int n)
cppverify::pre(n >= 0 && valid(a, n) && valid(out, n))
cppverify::modifies(*out)
Expand All @@ -61,7 +64,7 @@ void wrong_copy(const int *a, int *out, int n)
cppverify::invariant(cppverify::forall(j, 0, i, out[j] == a[j]))
cppverify::decreases(n - i)
{
out[i] = a[n - 1 - i];
out[i] = 0;
i = i + 1;
}
}
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