Add (set-option :model_validate true) to each SMT-LIB2 spec in
src/test/fpa.cpp, and add ENSURE checks that the output does not
contain the string "invalid".
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Adds src/test/fpa.cpp with test_fp_to_real_denormal() exercising the
bug reported in the issue: denormal floating-point values in
(_ FloatingPoint 2 24) were getting wrong fp.to_real values because
mk_to_real was not subtracting the normalization shift lz from the
exponent.
Tests verify:
- The specific denormal from the bug report is NOT > 1.0
- Two other denormals have correct real values (0.5 and 0.125)
- A normal value is correctly identified as > 1.0
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
