diff options
Diffstat (limited to 'cfrontend/Cexec.v')
| -rw-r--r-- | cfrontend/Cexec.v | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/cfrontend/Cexec.v b/cfrontend/Cexec.v index f589fab..5427ac6 100644 --- a/cfrontend/Cexec.v +++ b/cfrontend/Cexec.v @@ -435,7 +435,7 @@ Definition do_ef_free Definition memcpy_args_ok (sz al: Z) (bdst: block) (odst: Z) (bsrc: block) (osrc: Z) : Prop := - (al = 1 \/ al = 2 \/ al = 4) + (al = 1 \/ al = 2 \/ al = 4 \/ al = 8) /\ sz > 0 /\ (al | sz) /\ (al | osrc) /\ (al | odst) /\ (bsrc <> bdst \/ osrc = odst \/ osrc + sz <= odst \/ odst + sz <= osrc). @@ -445,8 +445,9 @@ Remark memcpy_check_args: {memcpy_args_ok sz al bdst odst bsrc osrc} + {~memcpy_args_ok sz al bdst odst bsrc osrc}. Proof with try (right; intuition omega). intros. - assert (X: {al = 1 \/ al = 2 \/ al = 4} + {~(al = 1 \/ al = 2 \/ al = 4)}). - destruct (zeq al 1); auto. destruct (zeq al 2); auto. destruct (zeq al 4); auto... + assert (X: {al = 1 \/ al = 2 \/ al = 4 \/ al = 8} + {~(al = 1 \/ al = 2 \/ al = 4 \/ al = 8)}). + destruct (zeq al 1); auto. destruct (zeq al 2); auto. + destruct (zeq al 4); auto. destruct (zeq al 8); auto... unfold memcpy_args_ok. destruct X... assert (al > 0) by (intuition omega). destruct (zlt 0 sz)... |