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smt2/smtbmc: Fix FF witness data for fine grained or multi chunk FFs

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The witness metadata was missing fine grained FFs completely and for
coarse grained FFs where the output connection has multiple chunks it
lacked the offset of the chunk within the SMT expression. This fixes
both, the later by adding an "smtoffset" field to the metadata.
This commit is contained in:
Jannis Harder 2022-10-12 19:01:24 +02:00
parent f35c062354
commit 4d334fd3e3
4 changed files with 29 additions and 12 deletions
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5
backends/smt2/smtbmc.py
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@ -669,7 +669,7 @@ if inywfile is not None:
if common_end <= common_offset:
continue
smt_expr = smt.net_expr(topmod, f"s{t}", wire["smtpath"])
smt_expr = smt.witness_net_expr(topmod, f"s{t}", wire)
if not smt_bool:
slice_high = common_end - offset - 1
@ -1267,7 +1267,8 @@ def write_yw_trace(steps_start, steps_stop, index, allregs=False):
sigs = seqs
for sig in sigs:
step_values[sig["sig"]] = smt.bv2bin(smt.get(smt.net_expr(topmod, f"s{k}", sig["smtpath"])))
value = smt.bv2bin(smt.get(smt.witness_net_expr(topmod, f"s{k}", sig)))
step_values[sig["sig"]] = value
yw.step(step_values)
yw.end_trace()