I've created a model in Spin. The simulation is running as expected. However, when I try to verify ltl properties, I get the following results:
C:/cygwin64/bin/gcc.exe -DMEMLIM=1024 -O2 -DXUSAFE -w -o pan pan.c
./pan -m10000 -a
Pid: 9372
pan:1: VECTORSZ is too small, edit pan.h (at depth 0)
pan: wrote cs.pml.trail
(Spin Version 6.4.5 -- 1 January 2016)
Warning: Search not completed
+ Partial Order Reduction
Full statespace search for:
never claim + (p1)
assertion violations + (if within scope of claim)
acceptance cycles + (fairness disabled)
invalid end states - (disabled by never claim)
State-vector 1036 byte, depth reached 0, errors: 1
0 states, stored
0 states, matched
0 transitions (= stored+matched)
0 atomic steps
hash conflicts: 0 (resolved)
Stats on memory usage (in Megabytes):
0.000 equivalent memory usage for states (stored*(State-vector + overhead))
0.000 actual memory usage for states (less than 1k)
128.000 memory used for hash table (-w24)
0.534 memory used for DFS stack (-m10000)
0.632 total actual memory usage
pan: elapsed time 4.11e+03 seconds
To replay the error-trail, goto Simulate/Replay and select "Run"
Running the simulation using the trail file didn't give much information since the simulation ends immediately (I only get warnings related to unused variables). I suspect that VECTORSZ is too small is causing the issue. How do I change this value using iSpin?
Alright, I was able to fix the problem.
Using iSpin, go to Verification tab, then click Show Advanced Parameter Settings. Then add -DVECTORSZ=4096 to the Extra Compile-Time Directives field and then re-run verification.