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Check cbmc-library regressions for completeness #4658

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Dec 6, 2022
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53 changes: 0 additions & 53 deletions regression/cbmc-library/Float-div1-refine/main.c

This file was deleted.

53 changes: 0 additions & 53 deletions regression/cbmc-library/Float-div1/main.c

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19 changes: 0 additions & 19 deletions regression/cbmc-library/Float-no-simp8/main.c

This file was deleted.

19 changes: 0 additions & 19 deletions regression/cbmc-library/Float-to-double1/main.c

This file was deleted.

55 changes: 0 additions & 55 deletions regression/cbmc-library/Float_lib1/main.c

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33 changes: 0 additions & 33 deletions regression/cbmc-library/Float_lib2/main.c

This file was deleted.

8 changes: 0 additions & 8 deletions regression/cbmc-library/Float_lib2/test.desc

This file was deleted.

9 changes: 9 additions & 0 deletions regression/cbmc-library/__acrt_iob_func-01/main.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
#include <assert.h>
#include <time.h>

int main()
{
__acrt_iob_func();
assert(0);
return 0;
}
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
CORE
KNOWNBUG
main.c
--floatbv --no-simplify
--pointer-check --bounds-check
^EXIT=0$
^SIGNAL=0$
^VERIFICATION SUCCESSFUL$
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52 changes: 49 additions & 3 deletions regression/cbmc-library/__builtin_isinf-01/main.c
Original file line number Diff line number Diff line change
@@ -1,9 +1,55 @@
#include <assert.h>
#include <float.h>
#include <math.h>

int main()
{
__builtin_isinf();
assert(0);
return 0;
double xxx;

// Visual Studio needs to be 2013 onwards
#if defined(_MSC_VER) && !defined(__CYGWIN__) && _MSC_VER < 1800

// see http://www.johndcook.com/math_h.html

#else
assert(fpclassify(DBL_MAX + DBL_MAX) == FP_INFINITE);
assert(fpclassify(0 * (DBL_MAX + DBL_MAX)) == FP_NAN);
assert(fpclassify(1.0) == FP_NORMAL);
assert(fpclassify(DBL_MIN) == FP_NORMAL);
assert(fpclassify(DBL_MIN / 2) == FP_SUBNORMAL);
assert(fpclassify(-0.0) == FP_ZERO);
#endif

#if !defined(__clang__) && defined(__GNUC__)
assert(__builtin_fpclassify(0, 1, 2, 3, 4, DBL_MAX + DBL_MAX) == 1);
assert(__builtin_fpclassify(0, 1, 2, 3, 4, 0 * (DBL_MAX + DBL_MAX)) == 0);
assert(__builtin_fpclassify(0, 1, 2, 3, 4, 1.0) == 2);
assert(__builtin_fpclassify(0, 1, 2, 3, 4, DBL_MIN) == 2);
assert(__builtin_fpclassify(0, 1, 2, 3, 4, DBL_MIN / 2) == 3);
assert(__builtin_fpclassify(0, 1, 2, 3, 4, -0.0) == 4);

assert(__builtin_isinf(DBL_MAX + DBL_MAX) == 1);
assert(__builtin_isinf(0.0) == 0);
assert(__builtin_isinf(-(DBL_MAX + DBL_MAX)) == 1);

assert(__builtin_isinf_sign(DBL_MAX + DBL_MAX) == 1);
assert(__builtin_isinf_sign(0.0) == 0);
assert(__builtin_isinf_sign(-(DBL_MAX + DBL_MAX)) == -1);

// these are compile-time
_Static_assert(
__builtin_fpclassify(0, 1, 2, 3, 4, -0.0) == 4,
"__builtin_fpclassify is constant");

_Static_assert(__builtin_isnormal(DBL_MIN), "__builtin_isnormal is constant");

_Static_assert(!__builtin_isinf(0.0), "__builtin_isinf is constant");

_Static_assert(
__builtin_isinf_sign(0.0) == 0, "__builtin_isinf_sign is constant");

#endif

assert(signbit(-1.0) != 0);
assert(signbit(1.0) == 0);
}
4 changes: 2 additions & 2 deletions regression/cbmc-library/__builtin_isinf-01/test.desc
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
KNOWNBUG
CORE
main.c
--pointer-check --bounds-check
--floatbv
^EXIT=0$
^SIGNAL=0$
^VERIFICATION SUCCESSFUL$
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50 changes: 47 additions & 3 deletions regression/cbmc-library/__fpclassify-01/main.c
Original file line number Diff line number Diff line change
@@ -1,9 +1,53 @@
#include <assert.h>
#include <math.h>

int main()
#ifdef __GNUC__
void inductiveStepHunt(float startState)
{
__fpclassify();
assert(0);
float target = 0x1.fffffep-3f;

__CPROVER_assume(
(0 < startState) && (fpclassify(startState) == FP_NORMAL) &&
(0x1p-126f <= startState));

float secondPoint = (target / startState);

float nextState = (startState + secondPoint) / 2;

float oneAfter = (target / nextState);

assert(oneAfter > 0);
}

void simplifiedInductiveStepHunt(float nextState)
{
float target = 0x1.fffffep-3f;

// Implies nextState == 0x1p+124f;
__CPROVER_assume(
(0x1.fffffep+123f < nextState) && (nextState < 0x1.000002p+124f));

float oneAfter = (target / nextState);

// Is true and correctly proven by constant evaluation
// Note that this is the smallest normal number
assert(0x1.fffffep-3f / 0x1p+124f == 0x1p-126f);

assert(oneAfter > 0);
}
#endif

int main(void)
{
#ifdef __GNUC__
// inductiveStepHunt(0x1p+125f);
// simplifiedInductiveStepHunt(0x1p+124f);

float f, g;

inductiveStepHunt(f);
simplifiedInductiveStepHunt(g);
#endif

return 0;
}
4 changes: 2 additions & 2 deletions regression/cbmc-library/__fpclassify-01/test.desc
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
KNOWNBUG
CORE
main.c
--pointer-check --bounds-check
--floatbv
^EXIT=0$
^SIGNAL=0$
^VERIFICATION SUCCESSFUL$
Expand Down
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