YOSYS-SMTBMC(1)

✨ yosys-smtbmc ✨

okay bestie, gather round 💖 this is the manual page for yosys-smtbmc, and its whole entire job is writing your design out to an SMT2-LIBv2 file. that's it. that's the gig. no cap.

it's giving "tiny tool, big consequences," and honestly? iconic.

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🌸 SYNOPSIS 🌸

yosys-smtbmc [options] <yosys_smt2_output>

you hand it the SMT2 output from Yosys, you sprinkle some options on top, and off it goes 🦋

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💅 OPTIONS 💅

• -t [<skip_steps>:]<num_steps> — sets your steps, and yes the bracket part is optional. the defaults are skip_steps=0 and num_steps=20, so if you just vibe with it, that's what you get. ✨
• -u <start_step> — assumes asserts in skipped steps when you're in BMC mode. lowkey a whole mood.
• -S <step_size> — proves <step_size> time steps all at once. big batch energy. 🔥
• -c <vcd_filename> — writes the counter-example out to this VCD file. 💀 (hint: use write_smt2 -wires for maximum coverage of signals in the generated VCD file — trust, you want the coverage bestie.)
• -i — instead of BMC, runs temporal induction. different mode, different destiny.
• -m <module_name> — names the top module. main character module selection, periodt. 👑
• -s <solver> — sets the SMT solver. your choices are z3, cvc4, yices, and mathsat. default: z3. 🌈
• -v — enables debug output. for when you simply must know everything.
• -p — disables the timer display during solving. if watching the clock stresses you out, this one's for you 🫶
• -d <filename> — writes smt2 statements to a file. saving the receipts, fr fr. 🍓

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🎀 AUTHOR 🎀

this manual page was written by Sebastian Kuzminsky <seb@highlab.com> for the Debian project (and may be used by others). we love a documented legend. 💜

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and that's the whole page bestie!! 💖 this was yosys-smtbmc, dated 13 July 2026, and you now know everything it has to offer. go write some SMT2 files and slay. ✨🦋🎀 iykyk 🧚