diff --git a/AccessingCodebuildLogs.md b/AccessingCodebuildLogs.md
deleted file mode 100644
index ca1a8976591..00000000000
--- a/AccessingCodebuildLogs.md
+++ /dev/null
@@ -1,30 +0,0 @@
-Accessing CodeBuild Logs
-------------------------
-
-The CodeBuild jobs on PRs can fail, but the logs have restricted access.
-
-To get hold of the logs you need to do the following:
-
-1. Get the job URL
-
-Right click on the relevant job, and copy the link URL
-
-![GetLink](doc/assets/GetLink.png)
-
-2. Extract the ID
-
-The link should look something like:
-
-> https://us-east-1.console.aws.amazon.com/codebuild/home?region=us-east-1#/builds/cbmc-linux-clang:*a32eddfe-19e6-45d9-b0e4-d9a92e5b5698*/view/new
-
-The job ID is the UID following the title of the job, int his case:
-
-> `a32eddfe-19e6-45d9-b0e4-d9a92e5b5698`
-
-3. Download the log
-
-Go to the following URL:
-
-http://cbmclogs.diffblue.com/{job-name}/{job-id}.gz
-
-Where `job-name` is the name of the job (e.g. `cbmc` or `cbmc-linux-clang`) and `job-id` is the ID extracted in the previous step.
diff --git a/buildspec-linux-clang-3.8.yml b/buildspec-linux-clang-3.8.yml
deleted file mode 100644
index a5a8813c1d4..00000000000
--- a/buildspec-linux-clang-3.8.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-
-phases:
-  install:
-    commands:
-      - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
-      - apt-get update -y
-      - apt-get install -y clang-3.8 flex bison make git curl patch ccache libc6-dev-i386 jq openjdk-8-jdk maven
-  build:
-    commands:
-      - echo Build started on `date`
-      - make -C src minisat2-download
-      - make -C jbmc/src setup-submodules
-      - make -C src CXX='ccache /usr/bin/clang++-3.8' CXX_FLAGS='-Qunused-arguments -DDEBUG'
-      - make -C jbmc/src CXX='ccache /usr/bin/clang++-3.8' CXX_FLAGS='-Qunused-arguments -DDEBUG'
-  post_build:
-    commands:
-      - echo Build completed on `date`
-cache:
-  paths:
-    - '/var/cache/apt/**/*'
-    - '/var/lib/apt/lists/**/*'
-    - '/root/.ccache/**/*'
diff --git a/buildspec-linux-clang.yml b/buildspec-linux-clang.yml
deleted file mode 100644
index ff790c8eb5c..00000000000
--- a/buildspec-linux-clang.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-
-phases:
-  install:
-    runtime-versions:
-      java: openjdk8
-    commands:
-      - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
-      - wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
-      - add-apt-repository 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main'
-      - apt-get update -y
-      - apt-get install -y clang-8 flex bison make git curl patch ccache libc6-dev-i386 jq gdb
-  build:
-    commands:
-      - echo Build started on `date`
-      - make -C src minisat2-download
-      - make -C jbmc/src setup-submodules
-      - make -C src CXX='ccache /usr/bin/clang++-8' CXX_FLAGS='-Qunused-arguments' -j2
-      - make -C unit CXX='ccache /usr/bin/clang++-8' CXX_FLAGS='-Qunused-arguments' -j2
-      - make -C jbmc/src CXX='ccache /usr/bin/clang++-8' CXX_FLAGS='-Qunused-arguments' -j2
-      - make -C jbmc/unit CXX='ccache /usr/bin/clang++-8' CXX_FLAGS='-Qunused-arguments' -j2
-  post_build:
-    commands:
-      - make -C unit test
-      - echo "Running expected failure tests"
-      - make TAGS="[!shouldfail]" -C unit test
-      - make -C regression test CXX='ccache /usr/bin/clang++-8' CXX_FLAGS='-Qunused-arguments'
-      - make -C regression/cbmc test-paths-lifo
-      - env PATH=$PATH:`pwd`/src/solvers make -C regression/cbmc test-cprover-smt2
-      - make -C jbmc/unit test
-      - echo "Running expected failure tests"
-      - make TAGS="[!shouldfail]" -C jbmc/unit test
-      - make -C jbmc/regression test
-      - echo Build completed on `date`
-cache:
-  paths:
-    - '/var/cache/apt/**/*'
-    - '/var/lib/apt/lists/**/*'
-    - '/root/.ccache/**/*'
diff --git a/buildspec-linux-cmake-gcc.yml b/buildspec-linux-cmake-gcc.yml
deleted file mode 100644
index 51ba6a538cf..00000000000
--- a/buildspec-linux-cmake-gcc.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-
-phases:
-  install:
-    runtime-versions:
-      java: openjdk8
-    commands:
-      - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
-      - apt-get update -y
-      - apt-get install -y flex bison make git curl patch ccache libc6-dev-i386 jq cmake
-  build:
-    commands:
-      - echo Build started on `date`
-      - cmake -S . -Bbuild '-DCMAKE_BUILD_TYPE=Release'  '-DCMAKE_CXX_COMPILER=/usr/bin/g++'
-      - git submodule update --init --recursive
-      - cmake --build build -- -j2
-  post_build:
-    commands:
-      - cd build; ctest -V -L CORE -j2
-      - cd build; ctest -V -R unit-xfail -j2
-      - echo Build completed on `date`
-cache:
-  paths:
-    - '/var/cache/apt/**/*'
-    - '/var/lib/apt/lists/**/*'
-    - '/root/.ccache/**/*'
diff --git a/buildspec-msbuild.yml b/buildspec-msbuild.yml
deleted file mode 100644
index c53310981dd..00000000000
--- a/buildspec-msbuild.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-
-phases:
-  install:
-    commands:
-      - choco install cyg-get -y --no-progress
-      - cyg-get bash patch bison flex make wget perl jq
-      - nuget install clcache -OutputDirectory "c:\tools" -ExcludeVersion -Version 4.1.0
-
-  build:
-    commands:
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        bash -c "make -C src minisat2-download DOWNLOADER=wget"
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
-        $env:CLCACHE_DIR = "C:\clcache"
-        $env:CLCACHE_BASEDIR = (Get-Item -Path ".\").FullName
-        cmd /c 'bash -c "cd scripts ; ./generate_vcxproj"'
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C src BUILD_ENV=MSVC generated_files"'
-        $env:Path = "C:\Program Files (x86)\MSBuild\14.0\Bin;$env:Path"
-        msbuild /p:CLToolExe=clcache.exe /m:4 cbmc.vcxproj
-
-      - |
-        # display cache stats
-        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
-        $env:CLCACHE_DIR = "C:\clcache"
-        $env:CLCACHE_BASEDIR = (Get-Item -Path ".\").FullName
-        cmd /c 'clcache -s'
-
-cache:
-  paths:
-    - 'c:\clcache\**\*'
diff --git a/buildspec-windows-cmake.yml b/buildspec-windows-cmake.yml
deleted file mode 100644
index a020571ca9c..00000000000
--- a/buildspec-windows-cmake.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-
-phases:
-  install:
-    commands:
-      - choco install -y --no-progress cmake --installargs 'ADD_CMAKE_TO_PATH=System'
-      - choco install cyg-get -y --no-progress
-      - cyg-get bison flex
-      - choco install -y --no-progress ninja
-      - nuget install clcache -OutputDirectory "c:\tools" -ExcludeVersion -Version 4.1.0
-
-  build:
-    commands:
-      - |
-        refreshenv
-        $Env:CLCACHE_DIR = "C:\clcache"
-        $Env:CLCACHE_BASEDIR = (Get-Item -Path ".\").FullName
-        $Env:PATH = "C:\Program Files\CMake\bin;$Env:PATH"
-        $Env:PATH = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$Env:PATH"
-        & .\scripts\vcvars64.ps1
-        git submodule update --init --recursive
-        cmake -S . -Bbuild -G Ninja "-DCMAKE_C_COMPILER=clcache.exe" "-DCMAKE_CXX_COMPILER=clcache.exe" -DCMAKE_BUILD_TYPE=Release
-        cmake --build build --config Release --target cbmc
-        cmake --build build --config Release --target jbmc
-        cmake --build build --config Release --target unit
-        # display cache stats
-        clcache -s
-
-cache:
-  paths:
-    - 'c:\clcache\**\*'
diff --git a/buildspec-windows.yml b/buildspec-windows.yml
deleted file mode 100644
index 47e8dc3c31c..00000000000
--- a/buildspec-windows.yml
+++ /dev/null
@@ -1,78 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-
-phases:
-  install:
-    commands:
-      - choco install cyg-get -y --no-progress
-      - cyg-get bash patch bison flex make wget perl jq
-      - nuget install clcache -OutputDirectory "c:\tools" -ExcludeVersion -Version 4.1.0
-
-  build:
-    commands:
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        bash -c "make -C src minisat2-download DOWNLOADER=wget"
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
-        $env:CLCACHE_DIR = "C:\clcache"
-        $env:CLCACHE_BASEDIR = (Get-Item -Path ".\").FullName
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C src BUILD_ENV=MSVC" '
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C unit all BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
-        $env:CLCACHE_DIR = "C:\clcache"
-        $env:CLCACHE_BASEDIR = (Get-Item -Path ".\").FullName
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -j4 -C jbmc/src setup-submodules" && bash -c "make CXX=clcache.exe -j4 -C jbmc/src BUILD_ENV=MSVC" '
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C jbmc/unit all BUILD_ENV=MSVC" '
-
-      - |
-        # display cache stats
-        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
-        $env:CLCACHE_DIR = "C:\clcache"
-        $env:CLCACHE_BASEDIR = (Get-Item -Path ".\").FullName
-        cmd /c 'clcache -s'
-
-  post_build:
-    commands:
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -C regression test BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "$pwd\src\solvers;C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -C regression/cbmc test-cprover-smt2 BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -C regression/cbmc test-paths-lifo BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -C unit test BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make TAGS=[!shouldfail] -C unit test BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -C jbmc/regression test BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -C jbmc/unit test BUILD_ENV=MSVC" '
-
-      - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
-        cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make TAGS=[!shouldfail] -C jbmc/unit test BUILD_ENV=MSVC" '
-
-cache:
-  paths:
-    - 'c:\clcache\**\*'
diff --git a/buildspec.yml b/buildspec.yml
deleted file mode 100644
index add9840d7fd..00000000000
--- a/buildspec.yml
+++ /dev/null
@@ -1,43 +0,0 @@
-version: 0.2
-
-env:
-  variables:
-    # CodeBuild console doesn't display color codes correctly
-    TESTPL_COLOR_OUTPUT: 0
-    CP_EXTRA_CXXFLAGS: -D_GLIBCXX_DEBUG
-
-phases:
-  install:
-    runtime-versions:
-      java: openjdk8
-    commands:
-      - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
-      - apt-get update -y
-      - apt-get install -y flex bison make git curl patch ccache libc6-dev-i386 jq gdb libxml2-utils
-  build:
-    commands:
-      - echo Build started on `date`
-      - make -C src minisat2-download
-      - make -C jbmc/src setup-submodules
-      - make -C src CXX="ccache g++" -j2
-      - make -C unit CXX="ccache g++" -j2
-      - make -C jbmc/src CXX="ccache g++" -j2
-      - make -C jbmc/unit CXX="ccache g++" -j2
-  post_build:
-    commands:
-      - make -C unit test
-      - echo "Running expected failure tests"
-      - make TAGS="[!shouldfail]" -C unit test
-      - make -C regression test
-      - make -C regression/cbmc test-paths-lifo
-      - env PATH=$PATH:`pwd`/src/solvers make -C regression/cbmc test-cprover-smt2
-      - make -C jbmc/unit test
-      - echo "Running expected failure tests"
-      - make TAGS="[!shouldfail]" -C jbmc/unit test
-      - make -C jbmc/regression test
-      - echo Build completed on `date`
-cache:
-  paths:
-    - '/var/cache/apt/**/*'
-    - '/var/lib/apt/lists/**/*'
-    - '/root/.ccache/**/*'