A collection of SMT solvers used by OpenJML
These two Windows builds were removed (2026-08-23). z3-4.5.0/4.6.0 are still present and tested normally on Solvers-linux and Solvers-macos -- this is a Windows-specific removal only, since jSMTLIB's up-front solver-availability check treats a missing executable as "skip this solver here, warn, don't fail" (see LogicTests.solversFromEnv() in the jSMTLIB repo), so simply not having these two .exe files on Windows is enough to exclude them there without touching any test configuration.
Reason: on Windows CI, z3-4.5.0.exe and z3-4.6.0.exe produced zero output for every single test -- no response to even the first command, and no launch-failure message from jSMTLIB either, consistent with the process crashing immediately on startup rather than hanging.
Hypothesis (unconfirmed -- no Windows environment was available to verify directly): these two .exe files need the older Visual C++ 2012 runtime (msvcp110.dll / msvcr110.dll), which isn't bundled here. The existing Windows z3 builds (4.3.2 through 5.1.0) all share one older VS2010-era DLL set (msvcp100.dll / msvcr100.dll / vcomp100.dll, alongside libz3.dll and Microsoft.Z3.dll) already present in Solvers-windows/, and every other build works fine off that set -- implying z3.exe is normally statically linked and doesn't actually need those shared DLLs for its own operation. z3-4.5.0/4.6.0 specifically predate whichever z3 release switched to (or already used) static linking, so they may be the odd ones out that still need the runtime DLL dynamically. z3-4.7.1 and later Windows builds do not exhibit this problem.
If these two are wanted on Windows again, re-adding the matching VS2012 runtime DLLs to Solvers-windows/ alongside the two .exe files (or switching to a build that doesn't need them) would be the first thing to try.