cbmc: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/cbmc - from package: cbmc

You may install the required package with command apt-get install {package}

Error in other languages:
cbmc: bevel nie gevind nie
cbmc: comandă negăsită
cbmc: comando não encontrado
cbmc: commande introuvable
cbmc: command not found
cbmc: käsku ei ole
cbmc: không tìm thấy lệnh
cbmc: komanda nerasta
cbmc: Kommando nicht gefunden.
cbmc: kommandot finns inte
cbmc: komut yok
cbmc: nie znaleziono polecenia
cbmc: níor aimsíodh an t-ordú
cbmc: no se encontró la orden
cbmc: no s'ha trobat l'ordre
cbmc: opdracht niet gevonden
cbmc: parancs nem található
cbmc: perintah tidak ditemukan
cbmc: príkaz nenájdený
cbmc: příkaz nenalezen
cbmc: команда не найдена
cbmc: командата не е открита
cbmc: 命令找不到
cbmc: コマンドが見つかりません