./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 10:56:46,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:56:46,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:56:46,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:56:46,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:56:46,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:56:46,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:56:46,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:56:46,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:56:46,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:56:46,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:56:46,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:56:46,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:56:46,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:56:46,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:56:46,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:56:46,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:56:46,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:56:46,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:56:46,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:56:46,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:56:46,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:56:46,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:56:46,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:56:46,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:56:46,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:56:46,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:56:46,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:56:46,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:56:46,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:56:46,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:56:46,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:56:46,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:56:46,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:56:46,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:56:46,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:56:46,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:56:46,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:56:46,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:56:46,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:56:46,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:56:46,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 10:56:46,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:56:46,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:56:46,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:56:46,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:56:46,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:56:46,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:56:46,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:56:46,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:56:46,352 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:56:46,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:56:46,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 10:56:46,353 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 10:56:46,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:56:46,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 10:56:46,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:56:46,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 10:56:46,353 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 10:56:46,354 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 10:56:46,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:56:46,354 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 10:56:46,354 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 10:56:46,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:56:46,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:56:46,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:56:46,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:56:46,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:56:46,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:56:46,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:56:46,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 10:56:46,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 10:56:46,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:56:46,356 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:56:46,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:56:46,357 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:56:46,357 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 [2022-12-13 10:56:46,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:56:46,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:56:46,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:56:46,570 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:56:46,571 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:56:46,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-12-13 10:56:49,162 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:56:49,319 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:56:49,320 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-12-13 10:56:49,327 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/data/0a984d161/c17b60b1f9674a35b8ce0bfda2cb24dc/FLAGc36c20072 [2022-12-13 10:56:49,341 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/data/0a984d161/c17b60b1f9674a35b8ce0bfda2cb24dc [2022-12-13 10:56:49,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:56:49,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:56:49,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:56:49,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:56:49,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:56:49,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468a9b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49, skipping insertion in model container [2022-12-13 10:56:49,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:56:49,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:56:49,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,501 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,505 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,509 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,522 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-12-13 10:56:49,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:56:49,533 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 10:56:49,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,544 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,544 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,544 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,544 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,547 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,547 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,547 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:56:49,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:56:49,563 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-12-13 10:56:49,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:56:49,575 INFO L208 MainTranslator]: Completed translation [2022-12-13 10:56:49,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49 WrapperNode [2022-12-13 10:56:49,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:56:49,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 10:56:49,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 10:56:49,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 10:56:49,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,607 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 253 [2022-12-13 10:56:49,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 10:56:49,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 10:56:49,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 10:56:49,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 10:56:49,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 10:56:49,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 10:56:49,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 10:56:49,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 10:56:49,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (1/1) ... [2022-12-13 10:56:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:56:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:49,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 10:56:49,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23cf8192-1193-4051-8271-c5207c6fc9df/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 10:56:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 10:56:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 10:56:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 10:56:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 10:56:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 10:56:49,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 10:56:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 10:56:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 10:56:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 10:56:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 10:56:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 10:56:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 10:56:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 10:56:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-12-13 10:56:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-12-13 10:56:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-12-13 10:56:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-12-13 10:56:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 10:56:49,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 10:56:49,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 10:56:49,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 10:56:49,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 10:56:49,693 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 10:56:49,785 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 10:56:49,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 10:56:50,117 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 10:56:50,157 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 10:56:50,157 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 10:56:50,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:56:50 BoogieIcfgContainer [2022-12-13 10:56:50,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 10:56:50,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 10:56:50,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 10:56:50,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 10:56:50,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:56:49" (1/3) ... [2022-12-13 10:56:50,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c7fc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:56:50, skipping insertion in model container [2022-12-13 10:56:50,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:49" (2/3) ... [2022-12-13 10:56:50,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c7fc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:56:50, skipping insertion in model container [2022-12-13 10:56:50,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:56:50" (3/3) ... [2022-12-13 10:56:50,166 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2022-12-13 10:56:50,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 10:56:50,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-13 10:56:50,181 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 10:56:50,270 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-12-13 10:56:50,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 267 transitions, 606 flow [2022-12-13 10:56:50,366 INFO L130 PetriNetUnfolder]: 8/235 cut-off events. [2022-12-13 10:56:50,366 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 10:56:50,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 235 events. 8/235 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 367 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 198. Up to 3 conditions per place. [2022-12-13 10:56:50,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 267 transitions, 606 flow [2022-12-13 10:56:50,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 230 transitions, 508 flow [2022-12-13 10:56:50,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:56:50,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 230 transitions, 508 flow [2022-12-13 10:56:50,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 230 transitions, 508 flow [2022-12-13 10:56:50,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 230 transitions, 508 flow [2022-12-13 10:56:50,425 INFO L130 PetriNetUnfolder]: 8/230 cut-off events. [2022-12-13 10:56:50,425 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 10:56:50,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 230 events. 8/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 369 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 198. Up to 3 conditions per place. [2022-12-13 10:56:50,430 INFO L119 LiptonReduction]: Number of co-enabled transitions 10984 [2022-12-13 10:56:54,816 INFO L134 LiptonReduction]: Checked pairs total: 70852 [2022-12-13 10:56:54,816 INFO L136 LiptonReduction]: Total number of compositions: 165 [2022-12-13 10:56:54,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:56:54,837 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8d167f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:56:54,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-12-13 10:56:54,838 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 10:56:54,839 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:56:54,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:56:54,839 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 10:56:54,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:56:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash 899, now seen corresponding path program 1 times [2022-12-13 10:56:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:54,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947617347] [2022-12-13 10:56:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:56:54,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:54,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947617347] [2022-12-13 10:56:54,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947617347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:54,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:56:54,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 10:56:54,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164009325] [2022-12-13 10:56:54,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:54,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 10:56:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 10:56:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 10:56:54,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 436 [2022-12-13 10:56:54,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:56:54,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:56:54,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 436 [2022-12-13 10:56:54,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:56:59,297 INFO L130 PetriNetUnfolder]: 38800/57066 cut-off events. [2022-12-13 10:56:59,297 INFO L131 PetriNetUnfolder]: For 5205/5205 co-relation queries the response was YES. [2022-12-13 10:56:59,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113367 conditions, 57066 events. 38800/57066 cut-off events. For 5205/5205 co-relation queries the response was YES. Maximal size of possible extension queue 2107. Compared 434932 event pairs, 37144 based on Foata normal form. 0/35219 useless extension candidates. Maximal degree in co-relation 112025. Up to 49514 conditions per place. [2022-12-13 10:56:59,746 INFO L137 encePairwiseOnDemand]: 432/436 looper letters, 49 selfloop transitions, 0 changer transitions 0/97 dead transitions. [2022-12-13 10:56:59,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 97 transitions, 340 flow [2022-12-13 10:56:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 10:56:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 10:56:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 529 transitions. [2022-12-13 10:56:59,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.606651376146789 [2022-12-13 10:56:59,762 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 529 transitions. [2022-12-13 10:56:59,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 529 transitions. [2022-12-13 10:56:59,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:56:59,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 529 transitions. [2022-12-13 10:56:59,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 264.5) internal successors, (529), 2 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:56:59,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:56:59,779 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:56:59,781 INFO L175 Difference]: Start difference. First operand has 116 places, 102 transitions, 252 flow. Second operand 2 states and 529 transitions. [2022-12-13 10:56:59,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 97 transitions, 340 flow [2022-12-13 10:56:59,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 308 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 10:56:59,862 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 210 flow [2022-12-13 10:56:59,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-12-13 10:56:59,866 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -15 predicate places. [2022-12-13 10:56:59,867 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 210 flow [2022-12-13 10:56:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:56:59,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:56:59,867 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 10:56:59,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 10:56:59,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:56:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash 852889984, now seen corresponding path program 1 times [2022-12-13 10:56:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709518046] [2022-12-13 10:56:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:59,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:56:59,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:59,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709518046] [2022-12-13 10:56:59,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709518046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:59,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:56:59,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 10:56:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983969505] [2022-12-13 10:56:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:56:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:00,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 436 [2022-12-13 10:57:00,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:00,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:00,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 436 [2022-12-13 10:57:00,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:04,267 INFO L130 PetriNetUnfolder]: 40038/59205 cut-off events. [2022-12-13 10:57:04,267 INFO L131 PetriNetUnfolder]: For 960/960 co-relation queries the response was YES. [2022-12-13 10:57:04,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112262 conditions, 59205 events. 40038/59205 cut-off events. For 960/960 co-relation queries the response was YES. Maximal size of possible extension queue 2125. Compared 455415 event pairs, 35683 based on Foata normal form. 0/36581 useless extension candidates. Maximal degree in co-relation 112259. Up to 47638 conditions per place. [2022-12-13 10:57:04,592 INFO L137 encePairwiseOnDemand]: 427/436 looper letters, 91 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2022-12-13 10:57:04,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 515 flow [2022-12-13 10:57:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2022-12-13 10:57:04,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2022-12-13 10:57:04,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2022-12-13 10:57:04,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2022-12-13 10:57:04,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:04,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2022-12-13 10:57:04,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:04,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:04,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:04,605 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 210 flow. Second operand 3 states and 763 transitions. [2022-12-13 10:57:04,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 515 flow [2022-12-13 10:57:04,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 144 transitions, 515 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 10:57:04,608 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 266 flow [2022-12-13 10:57:04,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2022-12-13 10:57:04,609 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -11 predicate places. [2022-12-13 10:57:04,609 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 266 flow [2022-12-13 10:57:04,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:04,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:04,610 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 10:57:04,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 10:57:04,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash 852889985, now seen corresponding path program 1 times [2022-12-13 10:57:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:04,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489850489] [2022-12-13 10:57:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489850489] [2022-12-13 10:57:04,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489850489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:04,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:04,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 10:57:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459917994] [2022-12-13 10:57:04,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:04,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:04,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:04,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 436 [2022-12-13 10:57:04,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:04,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:04,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 436 [2022-12-13 10:57:04,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:08,632 INFO L130 PetriNetUnfolder]: 39741/58765 cut-off events. [2022-12-13 10:57:08,632 INFO L131 PetriNetUnfolder]: For 2829/2837 co-relation queries the response was YES. [2022-12-13 10:57:08,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113213 conditions, 58765 events. 39741/58765 cut-off events. For 2829/2837 co-relation queries the response was YES. Maximal size of possible extension queue 2123. Compared 451927 event pairs, 37789 based on Foata normal form. 151/36502 useless extension candidates. Maximal degree in co-relation 113208. Up to 50850 conditions per place. [2022-12-13 10:57:08,897 INFO L137 encePairwiseOnDemand]: 433/436 looper letters, 52 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2022-12-13 10:57:08,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 368 flow [2022-12-13 10:57:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2022-12-13 10:57:08,899 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5726299694189603 [2022-12-13 10:57:08,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2022-12-13 10:57:08,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2022-12-13 10:57:08,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:08,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2022-12-13 10:57:08,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:08,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:08,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:08,903 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 266 flow. Second operand 3 states and 749 transitions. [2022-12-13 10:57:08,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 368 flow [2022-12-13 10:57:08,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:08,909 INFO L231 Difference]: Finished difference. Result has 103 places, 101 transitions, 250 flow [2022-12-13 10:57:08,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=103, PETRI_TRANSITIONS=101} [2022-12-13 10:57:08,910 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -13 predicate places. [2022-12-13 10:57:08,910 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 101 transitions, 250 flow [2022-12-13 10:57:08,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:08,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:08,910 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:08,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 10:57:08,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash -711458077, now seen corresponding path program 1 times [2022-12-13 10:57:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:08,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29053246] [2022-12-13 10:57:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29053246] [2022-12-13 10:57:09,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29053246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:09,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:09,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 10:57:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222105050] [2022-12-13 10:57:09,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:09,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 436 [2022-12-13 10:57:09,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:09,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:09,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 436 [2022-12-13 10:57:09,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:12,272 INFO L130 PetriNetUnfolder]: 29294/43670 cut-off events. [2022-12-13 10:57:12,272 INFO L131 PetriNetUnfolder]: For 1202/1208 co-relation queries the response was YES. [2022-12-13 10:57:12,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83645 conditions, 43670 events. 29294/43670 cut-off events. For 1202/1208 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 328876 event pairs, 27811 based on Foata normal form. 0/28099 useless extension candidates. Maximal degree in co-relation 83640. Up to 37704 conditions per place. [2022-12-13 10:57:12,479 INFO L137 encePairwiseOnDemand]: 434/436 looper letters, 51 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2022-12-13 10:57:12,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 352 flow [2022-12-13 10:57:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2022-12-13 10:57:12,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5711009174311926 [2022-12-13 10:57:12,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2022-12-13 10:57:12,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2022-12-13 10:57:12,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:12,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2022-12-13 10:57:12,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:12,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:12,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:12,484 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 250 flow. Second operand 3 states and 747 transitions. [2022-12-13 10:57:12,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 352 flow [2022-12-13 10:57:12,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 100 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 10:57:12,486 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 249 flow [2022-12-13 10:57:12,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2022-12-13 10:57:12,487 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -13 predicate places. [2022-12-13 10:57:12,487 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 249 flow [2022-12-13 10:57:12,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:12,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:12,488 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:12,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 10:57:12,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash -711458075, now seen corresponding path program 1 times [2022-12-13 10:57:12,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:12,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363559323] [2022-12-13 10:57:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:12,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363559323] [2022-12-13 10:57:12,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363559323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:12,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:12,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830136819] [2022-12-13 10:57:12,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 10:57:12,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 10:57:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 10:57:12,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 436 [2022-12-13 10:57:12,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 218.5) internal successors, (874), 4 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:12,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:12,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 436 [2022-12-13 10:57:12,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:14,640 INFO L130 PetriNetUnfolder]: 20288/30839 cut-off events. [2022-12-13 10:57:14,640 INFO L131 PetriNetUnfolder]: For 1174/1174 co-relation queries the response was YES. [2022-12-13 10:57:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59617 conditions, 30839 events. 20288/30839 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 228429 event pairs, 17543 based on Foata normal form. 0/21464 useless extension candidates. Maximal degree in co-relation 59612. Up to 23583 conditions per place. [2022-12-13 10:57:14,784 INFO L137 encePairwiseOnDemand]: 429/436 looper letters, 91 selfloop transitions, 10 changer transitions 0/147 dead transitions. [2022-12-13 10:57:14,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 147 transitions, 578 flow [2022-12-13 10:57:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2022-12-13 10:57:14,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5695718654434251 [2022-12-13 10:57:14,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2022-12-13 10:57:14,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2022-12-13 10:57:14,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:14,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2022-12-13 10:57:14,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:14,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:14,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:14,789 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 249 flow. Second operand 3 states and 745 transitions. [2022-12-13 10:57:14,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 147 transitions, 578 flow [2022-12-13 10:57:14,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 10:57:14,792 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 336 flow [2022-12-13 10:57:14,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2022-12-13 10:57:14,792 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2022-12-13 10:57:14,792 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 336 flow [2022-12-13 10:57:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.5) internal successors, (874), 4 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:14,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:14,793 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:14,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 10:57:14,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -952434526, now seen corresponding path program 1 times [2022-12-13 10:57:14,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:14,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096158509] [2022-12-13 10:57:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:14,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:14,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096158509] [2022-12-13 10:57:14,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096158509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:14,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:14,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 10:57:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153031761] [2022-12-13 10:57:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:14,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 10:57:14,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:14,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 10:57:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 10:57:15,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 436 [2022-12-13 10:57:15,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:15,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:15,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 436 [2022-12-13 10:57:15,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:16,592 INFO L130 PetriNetUnfolder]: 14126/23913 cut-off events. [2022-12-13 10:57:16,592 INFO L131 PetriNetUnfolder]: For 5515/5523 co-relation queries the response was YES. [2022-12-13 10:57:16,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48906 conditions, 23913 events. 14126/23913 cut-off events. For 5515/5523 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 195529 event pairs, 4493 based on Foata normal form. 0/18563 useless extension candidates. Maximal degree in co-relation 48900. Up to 14376 conditions per place. [2022-12-13 10:57:16,702 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 96 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-12-13 10:57:16,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 699 flow [2022-12-13 10:57:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 10:57:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 10:57:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 976 transitions. [2022-12-13 10:57:16,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5596330275229358 [2022-12-13 10:57:16,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 976 transitions. [2022-12-13 10:57:16,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 976 transitions. [2022-12-13 10:57:16,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:16,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 976 transitions. [2022-12-13 10:57:16,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:16,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:16,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:16,708 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 336 flow. Second operand 4 states and 976 transitions. [2022-12-13 10:57:16,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 699 flow [2022-12-13 10:57:16,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 667 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:16,719 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 398 flow [2022-12-13 10:57:16,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2022-12-13 10:57:16,720 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -9 predicate places. [2022-12-13 10:57:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 398 flow [2022-12-13 10:57:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:16,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:16,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 10:57:16,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1757518451, now seen corresponding path program 1 times [2022-12-13 10:57:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:16,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649073156] [2022-12-13 10:57:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:16,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:16,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649073156] [2022-12-13 10:57:16,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649073156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:16,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:16,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638644080] [2022-12-13 10:57:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:16,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 436 [2022-12-13 10:57:16,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:16,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:16,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 436 [2022-12-13 10:57:16,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:18,357 INFO L130 PetriNetUnfolder]: 12859/21783 cut-off events. [2022-12-13 10:57:18,357 INFO L131 PetriNetUnfolder]: For 7320/7332 co-relation queries the response was YES. [2022-12-13 10:57:18,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46861 conditions, 21783 events. 12859/21783 cut-off events. For 7320/7332 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 173310 event pairs, 3996 based on Foata normal form. 0/16705 useless extension candidates. Maximal degree in co-relation 46853. Up to 13216 conditions per place. [2022-12-13 10:57:18,449 INFO L137 encePairwiseOnDemand]: 428/436 looper letters, 101 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2022-12-13 10:57:18,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 159 transitions, 786 flow [2022-12-13 10:57:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2022-12-13 10:57:18,451 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.577217125382263 [2022-12-13 10:57:18,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2022-12-13 10:57:18,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2022-12-13 10:57:18,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:18,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2022-12-13 10:57:18,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:18,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:18,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:18,454 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 398 flow. Second operand 3 states and 755 transitions. [2022-12-13 10:57:18,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 159 transitions, 786 flow [2022-12-13 10:57:18,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 159 transitions, 779 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 10:57:18,457 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 532 flow [2022-12-13 10:57:18,457 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=532, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2022-12-13 10:57:18,458 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2022-12-13 10:57:18,458 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 532 flow [2022-12-13 10:57:18,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:18,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:18,458 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:18,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 10:57:18,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1757518452, now seen corresponding path program 1 times [2022-12-13 10:57:18,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:18,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124507518] [2022-12-13 10:57:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:18,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124507518] [2022-12-13 10:57:18,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124507518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:18,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:18,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:18,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266539050] [2022-12-13 10:57:18,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:18,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 436 [2022-12-13 10:57:18,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:18,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:18,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 436 [2022-12-13 10:57:18,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:19,862 INFO L130 PetriNetUnfolder]: 9877/17818 cut-off events. [2022-12-13 10:57:19,862 INFO L131 PetriNetUnfolder]: For 9916/9938 co-relation queries the response was YES. [2022-12-13 10:57:19,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40148 conditions, 17818 events. 9877/17818 cut-off events. For 9916/9938 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 146145 event pairs, 3348 based on Foata normal form. 974/15450 useless extension candidates. Maximal degree in co-relation 40139. Up to 12403 conditions per place. [2022-12-13 10:57:19,955 INFO L137 encePairwiseOnDemand]: 432/436 looper letters, 97 selfloop transitions, 7 changer transitions 0/151 dead transitions. [2022-12-13 10:57:19,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 857 flow [2022-12-13 10:57:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2022-12-13 10:57:19,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5902140672782875 [2022-12-13 10:57:19,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2022-12-13 10:57:19,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2022-12-13 10:57:19,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:19,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2022-12-13 10:57:19,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:19,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:19,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:19,960 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 532 flow. Second operand 3 states and 772 transitions. [2022-12-13 10:57:19,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 857 flow [2022-12-13 10:57:19,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 831 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:19,970 INFO L231 Difference]: Finished difference. Result has 108 places, 122 transitions, 516 flow [2022-12-13 10:57:19,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=108, PETRI_TRANSITIONS=122} [2022-12-13 10:57:19,970 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2022-12-13 10:57:19,971 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 122 transitions, 516 flow [2022-12-13 10:57:19,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:19,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:19,971 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:19,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 10:57:19,971 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1144321141, now seen corresponding path program 1 times [2022-12-13 10:57:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:19,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918116379] [2022-12-13 10:57:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:20,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918116379] [2022-12-13 10:57:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918116379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:20,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:20,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:20,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358944570] [2022-12-13 10:57:20,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:20,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:20,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:20,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 436 [2022-12-13 10:57:20,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 122 transitions, 516 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:20,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:20,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 436 [2022-12-13 10:57:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:21,255 INFO L130 PetriNetUnfolder]: 9718/16623 cut-off events. [2022-12-13 10:57:21,255 INFO L131 PetriNetUnfolder]: For 8433/8463 co-relation queries the response was YES. [2022-12-13 10:57:21,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38286 conditions, 16623 events. 9718/16623 cut-off events. For 8433/8463 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 129245 event pairs, 3666 based on Foata normal form. 480/14242 useless extension candidates. Maximal degree in co-relation 38277. Up to 10641 conditions per place. [2022-12-13 10:57:21,340 INFO L137 encePairwiseOnDemand]: 432/436 looper letters, 97 selfloop transitions, 9 changer transitions 0/152 dead transitions. [2022-12-13 10:57:21,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 152 transitions, 891 flow [2022-12-13 10:57:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2022-12-13 10:57:21,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5886850152905199 [2022-12-13 10:57:21,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2022-12-13 10:57:21,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2022-12-13 10:57:21,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:21,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2022-12-13 10:57:21,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:21,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:21,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:21,346 INFO L175 Difference]: Start difference. First operand has 108 places, 122 transitions, 516 flow. Second operand 3 states and 770 transitions. [2022-12-13 10:57:21,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 152 transitions, 891 flow [2022-12-13 10:57:21,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 869 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:21,355 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 516 flow [2022-12-13 10:57:21,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2022-12-13 10:57:21,356 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2022-12-13 10:57:21,356 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 516 flow [2022-12-13 10:57:21,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:21,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:21,357 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:21,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 10:57:21,357 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1144321142, now seen corresponding path program 1 times [2022-12-13 10:57:21,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:21,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068498216] [2022-12-13 10:57:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:21,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068498216] [2022-12-13 10:57:21,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068498216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:21,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:21,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:21,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032539032] [2022-12-13 10:57:21,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:21,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:21,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:21,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 436 [2022-12-13 10:57:21,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 516 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:21,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:21,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 436 [2022-12-13 10:57:21,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:23,277 INFO L130 PetriNetUnfolder]: 11884/19087 cut-off events. [2022-12-13 10:57:23,278 INFO L131 PetriNetUnfolder]: For 11734/11764 co-relation queries the response was YES. [2022-12-13 10:57:23,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45978 conditions, 19087 events. 11884/19087 cut-off events. For 11734/11764 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 141590 event pairs, 4173 based on Foata normal form. 0/16263 useless extension candidates. Maximal degree in co-relation 45969. Up to 10744 conditions per place. [2022-12-13 10:57:23,347 INFO L137 encePairwiseOnDemand]: 428/436 looper letters, 106 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2022-12-13 10:57:23,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 162 transitions, 917 flow [2022-12-13 10:57:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 754 transitions. [2022-12-13 10:57:23,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5764525993883792 [2022-12-13 10:57:23,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 754 transitions. [2022-12-13 10:57:23,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 754 transitions. [2022-12-13 10:57:23,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:23,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 754 transitions. [2022-12-13 10:57:23,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:23,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:23,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:23,354 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 516 flow. Second operand 3 states and 754 transitions. [2022-12-13 10:57:23,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 162 transitions, 917 flow [2022-12-13 10:57:23,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 162 transitions, 899 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:23,360 INFO L231 Difference]: Finished difference. Result has 108 places, 129 transitions, 644 flow [2022-12-13 10:57:23,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=644, PETRI_PLACES=108, PETRI_TRANSITIONS=129} [2022-12-13 10:57:23,361 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2022-12-13 10:57:23,361 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 129 transitions, 644 flow [2022-12-13 10:57:23,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:23,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:23,362 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 10:57:23,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1578185667, now seen corresponding path program 1 times [2022-12-13 10:57:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:23,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200391208] [2022-12-13 10:57:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:23,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:23,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200391208] [2022-12-13 10:57:23,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200391208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:23,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:23,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:23,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675297826] [2022-12-13 10:57:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:23,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 436 [2022-12-13 10:57:23,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 129 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:23,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:23,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 436 [2022-12-13 10:57:23,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:24,828 INFO L130 PetriNetUnfolder]: 10523/18317 cut-off events. [2022-12-13 10:57:24,828 INFO L131 PetriNetUnfolder]: For 14965/15097 co-relation queries the response was YES. [2022-12-13 10:57:24,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43901 conditions, 18317 events. 10523/18317 cut-off events. For 14965/15097 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 145820 event pairs, 3705 based on Foata normal form. 582/15859 useless extension candidates. Maximal degree in co-relation 43891. Up to 12564 conditions per place. [2022-12-13 10:57:24,926 INFO L137 encePairwiseOnDemand]: 432/436 looper letters, 106 selfloop transitions, 11 changer transitions 0/163 dead transitions. [2022-12-13 10:57:24,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1081 flow [2022-12-13 10:57:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2022-12-13 10:57:24,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5894495412844036 [2022-12-13 10:57:24,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2022-12-13 10:57:24,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2022-12-13 10:57:24,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:24,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2022-12-13 10:57:24,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:24,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:24,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:24,931 INFO L175 Difference]: Start difference. First operand has 108 places, 129 transitions, 644 flow. Second operand 3 states and 771 transitions. [2022-12-13 10:57:24,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1081 flow [2022-12-13 10:57:24,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1041 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:24,938 INFO L231 Difference]: Finished difference. Result has 106 places, 127 transitions, 634 flow [2022-12-13 10:57:24,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=634, PETRI_PLACES=106, PETRI_TRANSITIONS=127} [2022-12-13 10:57:24,939 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2022-12-13 10:57:24,939 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 127 transitions, 634 flow [2022-12-13 10:57:24,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:24,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:24,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:24,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 10:57:24,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1578185668, now seen corresponding path program 1 times [2022-12-13 10:57:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:24,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329907665] [2022-12-13 10:57:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:24,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329907665] [2022-12-13 10:57:24,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329907665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:24,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:24,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:24,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874441332] [2022-12-13 10:57:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:57:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:57:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:57:25,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 436 [2022-12-13 10:57:25,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 127 transitions, 634 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:25,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:25,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 436 [2022-12-13 10:57:25,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:26,692 INFO L130 PetriNetUnfolder]: 13519/22039 cut-off events. [2022-12-13 10:57:26,692 INFO L131 PetriNetUnfolder]: For 18317/18479 co-relation queries the response was YES. [2022-12-13 10:57:26,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54450 conditions, 22039 events. 13519/22039 cut-off events. For 18317/18479 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 169353 event pairs, 4411 based on Foata normal form. 0/18659 useless extension candidates. Maximal degree in co-relation 54440. Up to 12382 conditions per place. [2022-12-13 10:57:26,808 INFO L137 encePairwiseOnDemand]: 428/436 looper letters, 113 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2022-12-13 10:57:26,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1101 flow [2022-12-13 10:57:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:57:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:57:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2022-12-13 10:57:26,810 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.577217125382263 [2022-12-13 10:57:26,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2022-12-13 10:57:26,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2022-12-13 10:57:26,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:26,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2022-12-13 10:57:26,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:26,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:26,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:26,813 INFO L175 Difference]: Start difference. First operand has 106 places, 127 transitions, 634 flow. Second operand 3 states and 755 transitions. [2022-12-13 10:57:26,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1101 flow [2022-12-13 10:57:26,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1079 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:26,818 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 820 flow [2022-12-13 10:57:26,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=820, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2022-12-13 10:57:26,819 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2022-12-13 10:57:26,819 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 820 flow [2022-12-13 10:57:26,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:26,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:26,819 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:26,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 10:57:26,819 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 288947958, now seen corresponding path program 1 times [2022-12-13 10:57:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:26,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706453438] [2022-12-13 10:57:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706453438] [2022-12-13 10:57:26,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706453438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:26,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:26,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:57:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112181735] [2022-12-13 10:57:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:26,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 10:57:26,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 10:57:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 10:57:27,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 436 [2022-12-13 10:57:27,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 820 flow. Second operand has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:27,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:27,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 436 [2022-12-13 10:57:27,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:28,768 INFO L130 PetriNetUnfolder]: 12122/20417 cut-off events. [2022-12-13 10:57:28,768 INFO L131 PetriNetUnfolder]: For 21708/21948 co-relation queries the response was YES. [2022-12-13 10:57:28,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52165 conditions, 20417 events. 12122/20417 cut-off events. For 21708/21948 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 158256 event pairs, 5637 based on Foata normal form. 0/17673 useless extension candidates. Maximal degree in co-relation 52154. Up to 8231 conditions per place. [2022-12-13 10:57:28,852 INFO L137 encePairwiseOnDemand]: 427/436 looper letters, 125 selfloop transitions, 37 changer transitions 0/205 dead transitions. [2022-12-13 10:57:28,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 205 transitions, 1400 flow [2022-12-13 10:57:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 10:57:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 10:57:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 980 transitions. [2022-12-13 10:57:28,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5619266055045872 [2022-12-13 10:57:28,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 980 transitions. [2022-12-13 10:57:28,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 980 transitions. [2022-12-13 10:57:28,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:28,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 980 transitions. [2022-12-13 10:57:28,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:28,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:28,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:28,857 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 820 flow. Second operand 4 states and 980 transitions. [2022-12-13 10:57:28,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 205 transitions, 1400 flow [2022-12-13 10:57:28,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 205 transitions, 1348 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:28,870 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1032 flow [2022-12-13 10:57:28,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1032, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2022-12-13 10:57:28,871 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, -5 predicate places. [2022-12-13 10:57:28,871 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1032 flow [2022-12-13 10:57:28,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:28,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:28,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:28,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 10:57:28,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1598730933, now seen corresponding path program 1 times [2022-12-13 10:57:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:28,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997473605] [2022-12-13 10:57:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:29,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:29,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997473605] [2022-12-13 10:57:29,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997473605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:29,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:29,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 10:57:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471610818] [2022-12-13 10:57:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:29,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 10:57:29,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 10:57:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 10:57:29,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 436 [2022-12-13 10:57:29,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1032 flow. Second operand has 6 states, 6 states have (on average 216.16666666666666) internal successors, (1297), 6 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:29,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:29,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 436 [2022-12-13 10:57:29,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:30,995 INFO L130 PetriNetUnfolder]: 11759/19866 cut-off events. [2022-12-13 10:57:30,995 INFO L131 PetriNetUnfolder]: For 28333/28463 co-relation queries the response was YES. [2022-12-13 10:57:31,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52286 conditions, 19866 events. 11759/19866 cut-off events. For 28333/28463 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 154328 event pairs, 6886 based on Foata normal form. 243/17382 useless extension candidates. Maximal degree in co-relation 52274. Up to 8020 conditions per place. [2022-12-13 10:57:31,106 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 141 selfloop transitions, 45 changer transitions 0/227 dead transitions. [2022-12-13 10:57:31,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 227 transitions, 1651 flow [2022-12-13 10:57:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:57:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 10:57:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1413 transitions. [2022-12-13 10:57:31,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5401376146788991 [2022-12-13 10:57:31,109 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1413 transitions. [2022-12-13 10:57:31,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1413 transitions. [2022-12-13 10:57:31,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:31,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1413 transitions. [2022-12-13 10:57:31,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:31,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:31,114 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:31,114 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1032 flow. Second operand 6 states and 1413 transitions. [2022-12-13 10:57:31,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 227 transitions, 1651 flow [2022-12-13 10:57:31,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 227 transitions, 1643 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 10:57:31,135 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1216 flow [2022-12-13 10:57:31,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1216, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2022-12-13 10:57:31,136 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 2 predicate places. [2022-12-13 10:57:31,136 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1216 flow [2022-12-13 10:57:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 216.16666666666666) internal successors, (1297), 6 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:31,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:31,136 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:31,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 10:57:31,137 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash -553562908, now seen corresponding path program 1 times [2022-12-13 10:57:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:31,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021614634] [2022-12-13 10:57:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:31,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:31,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021614634] [2022-12-13 10:57:31,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021614634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:31,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:31,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 10:57:31,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261306287] [2022-12-13 10:57:31,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:31,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 10:57:31,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 10:57:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 10:57:31,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 436 [2022-12-13 10:57:31,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1216 flow. Second operand has 5 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:31,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:31,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 436 [2022-12-13 10:57:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:33,310 INFO L130 PetriNetUnfolder]: 11220/19114 cut-off events. [2022-12-13 10:57:33,311 INFO L131 PetriNetUnfolder]: For 38568/38736 co-relation queries the response was YES. [2022-12-13 10:57:33,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50915 conditions, 19114 events. 11220/19114 cut-off events. For 38568/38736 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 149747 event pairs, 6932 based on Foata normal form. 52/16562 useless extension candidates. Maximal degree in co-relation 50900. Up to 8143 conditions per place. [2022-12-13 10:57:33,424 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 161 selfloop transitions, 58 changer transitions 0/265 dead transitions. [2022-12-13 10:57:33,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 265 transitions, 2076 flow [2022-12-13 10:57:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:57:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 10:57:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1438 transitions. [2022-12-13 10:57:33,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5496941896024465 [2022-12-13 10:57:33,427 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1438 transitions. [2022-12-13 10:57:33,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1438 transitions. [2022-12-13 10:57:33,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:33,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1438 transitions. [2022-12-13 10:57:33,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:33,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:33,431 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:33,432 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1216 flow. Second operand 6 states and 1438 transitions. [2022-12-13 10:57:33,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 265 transitions, 2076 flow [2022-12-13 10:57:33,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 265 transitions, 2068 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 10:57:33,459 INFO L231 Difference]: Finished difference. Result has 125 places, 167 transitions, 1570 flow [2022-12-13 10:57:33,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1570, PETRI_PLACES=125, PETRI_TRANSITIONS=167} [2022-12-13 10:57:33,459 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 9 predicate places. [2022-12-13 10:57:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 167 transitions, 1570 flow [2022-12-13 10:57:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:33,460 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:33,460 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 10:57:33,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2090387358, now seen corresponding path program 1 times [2022-12-13 10:57:33,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:33,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446076729] [2022-12-13 10:57:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:33,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446076729] [2022-12-13 10:57:33,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446076729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:33,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:33,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 10:57:33,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699434564] [2022-12-13 10:57:33,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:33,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 10:57:33,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 10:57:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 10:57:33,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 436 [2022-12-13 10:57:33,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 167 transitions, 1570 flow. Second operand has 6 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:33,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:33,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 436 [2022-12-13 10:57:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:35,960 INFO L130 PetriNetUnfolder]: 12746/20921 cut-off events. [2022-12-13 10:57:35,961 INFO L131 PetriNetUnfolder]: For 52712/52935 co-relation queries the response was YES. [2022-12-13 10:57:36,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59142 conditions, 20921 events. 12746/20921 cut-off events. For 52712/52935 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 160908 event pairs, 2923 based on Foata normal form. 234/19150 useless extension candidates. Maximal degree in co-relation 59124. Up to 10366 conditions per place. [2022-12-13 10:57:36,076 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 194 selfloop transitions, 65 changer transitions 0/304 dead transitions. [2022-12-13 10:57:36,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 304 transitions, 2845 flow [2022-12-13 10:57:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:57:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 10:57:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1424 transitions. [2022-12-13 10:57:36,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2022-12-13 10:57:36,078 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1424 transitions. [2022-12-13 10:57:36,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1424 transitions. [2022-12-13 10:57:36,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:36,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1424 transitions. [2022-12-13 10:57:36,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.33333333333334) internal successors, (1424), 6 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:36,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:36,083 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:36,083 INFO L175 Difference]: Start difference. First operand has 125 places, 167 transitions, 1570 flow. Second operand 6 states and 1424 transitions. [2022-12-13 10:57:36,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 304 transitions, 2845 flow [2022-12-13 10:57:36,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 304 transitions, 2823 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 10:57:36,160 INFO L231 Difference]: Finished difference. Result has 133 places, 195 transitions, 2228 flow [2022-12-13 10:57:36,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2228, PETRI_PLACES=133, PETRI_TRANSITIONS=195} [2022-12-13 10:57:36,160 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 17 predicate places. [2022-12-13 10:57:36,160 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 195 transitions, 2228 flow [2022-12-13 10:57:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:36,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:36,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:36,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 10:57:36,161 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -842012550, now seen corresponding path program 1 times [2022-12-13 10:57:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516356562] [2022-12-13 10:57:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:36,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516356562] [2022-12-13 10:57:36,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516356562] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:36,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:36,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:57:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194146993] [2022-12-13 10:57:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 10:57:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 10:57:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 10:57:36,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 436 [2022-12-13 10:57:36,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 195 transitions, 2228 flow. Second operand has 8 states, 8 states have (on average 211.625) internal successors, (1693), 8 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:36,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:36,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 436 [2022-12-13 10:57:36,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:38,645 INFO L130 PetriNetUnfolder]: 11232/19191 cut-off events. [2022-12-13 10:57:38,645 INFO L131 PetriNetUnfolder]: For 68244/68370 co-relation queries the response was YES. [2022-12-13 10:57:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58160 conditions, 19191 events. 11232/19191 cut-off events. For 68244/68370 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 152774 event pairs, 3650 based on Foata normal form. 180/17559 useless extension candidates. Maximal degree in co-relation 58138. Up to 7934 conditions per place. [2022-12-13 10:57:38,772 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 171 selfloop transitions, 87 changer transitions 0/305 dead transitions. [2022-12-13 10:57:38,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 305 transitions, 3190 flow [2022-12-13 10:57:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:57:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 10:57:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2051 transitions. [2022-12-13 10:57:38,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5226809378185525 [2022-12-13 10:57:38,775 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2051 transitions. [2022-12-13 10:57:38,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2051 transitions. [2022-12-13 10:57:38,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:38,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2051 transitions. [2022-12-13 10:57:38,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.88888888888889) internal successors, (2051), 9 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:38,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:38,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:38,781 INFO L175 Difference]: Start difference. First operand has 133 places, 195 transitions, 2228 flow. Second operand 9 states and 2051 transitions. [2022-12-13 10:57:38,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 305 transitions, 3190 flow [2022-12-13 10:57:38,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 305 transitions, 3184 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 10:57:38,875 INFO L231 Difference]: Finished difference. Result has 145 places, 207 transitions, 2699 flow [2022-12-13 10:57:38,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2699, PETRI_PLACES=145, PETRI_TRANSITIONS=207} [2022-12-13 10:57:38,875 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 29 predicate places. [2022-12-13 10:57:38,876 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 207 transitions, 2699 flow [2022-12-13 10:57:38,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 211.625) internal successors, (1693), 8 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:38,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:38,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:38,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 10:57:38,876 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash 377500368, now seen corresponding path program 1 times [2022-12-13 10:57:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516520673] [2022-12-13 10:57:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:38,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:39,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:39,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516520673] [2022-12-13 10:57:39,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516520673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:39,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:39,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 10:57:39,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72560496] [2022-12-13 10:57:39,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:39,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:57:39,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:57:39,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:57:39,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 436 [2022-12-13 10:57:39,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 207 transitions, 2699 flow. Second operand has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:39,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:39,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 436 [2022-12-13 10:57:39,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:41,686 INFO L130 PetriNetUnfolder]: 11502/19910 cut-off events. [2022-12-13 10:57:41,686 INFO L131 PetriNetUnfolder]: For 97430/97638 co-relation queries the response was YES. [2022-12-13 10:57:41,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62781 conditions, 19910 events. 11502/19910 cut-off events. For 97430/97638 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 160891 event pairs, 2946 based on Foata normal form. 228/18398 useless extension candidates. Maximal degree in co-relation 62755. Up to 8756 conditions per place. [2022-12-13 10:57:41,777 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 191 selfloop transitions, 94 changer transitions 0/335 dead transitions. [2022-12-13 10:57:41,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 335 transitions, 3998 flow [2022-12-13 10:57:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:57:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 10:57:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2057 transitions. [2022-12-13 10:57:41,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.52420998980632 [2022-12-13 10:57:41,780 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2057 transitions. [2022-12-13 10:57:41,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2057 transitions. [2022-12-13 10:57:41,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:41,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2057 transitions. [2022-12-13 10:57:41,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.55555555555554) internal successors, (2057), 9 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:41,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:41,786 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:41,786 INFO L175 Difference]: Start difference. First operand has 145 places, 207 transitions, 2699 flow. Second operand 9 states and 2057 transitions. [2022-12-13 10:57:41,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 335 transitions, 3998 flow [2022-12-13 10:57:41,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 335 transitions, 3930 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-13 10:57:41,961 INFO L231 Difference]: Finished difference. Result has 154 places, 226 transitions, 3316 flow [2022-12-13 10:57:41,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3316, PETRI_PLACES=154, PETRI_TRANSITIONS=226} [2022-12-13 10:57:41,961 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 38 predicate places. [2022-12-13 10:57:41,961 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 226 transitions, 3316 flow [2022-12-13 10:57:41,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:41,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:41,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:41,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 10:57:41,962 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1621057455, now seen corresponding path program 1 times [2022-12-13 10:57:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:41,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329387769] [2022-12-13 10:57:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329387769] [2022-12-13 10:57:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329387769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:42,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:42,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 10:57:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800831016] [2022-12-13 10:57:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 10:57:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 10:57:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 10:57:42,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 436 [2022-12-13 10:57:42,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 226 transitions, 3316 flow. Second operand has 5 states, 5 states have (on average 220.6) internal successors, (1103), 5 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:42,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:42,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 436 [2022-12-13 10:57:42,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:44,504 INFO L130 PetriNetUnfolder]: 11542/20280 cut-off events. [2022-12-13 10:57:44,504 INFO L131 PetriNetUnfolder]: For 110806/110918 co-relation queries the response was YES. [2022-12-13 10:57:44,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64251 conditions, 20280 events. 11542/20280 cut-off events. For 110806/110918 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 164768 event pairs, 3492 based on Foata normal form. 126/18393 useless extension candidates. Maximal degree in co-relation 64222. Up to 8448 conditions per place. [2022-12-13 10:57:44,659 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 171 selfloop transitions, 85 changer transitions 0/300 dead transitions. [2022-12-13 10:57:44,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 300 transitions, 4094 flow [2022-12-13 10:57:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 10:57:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 10:57:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1210 transitions. [2022-12-13 10:57:44,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.555045871559633 [2022-12-13 10:57:44,662 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1210 transitions. [2022-12-13 10:57:44,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1210 transitions. [2022-12-13 10:57:44,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:44,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1210 transitions. [2022-12-13 10:57:44,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:44,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 436.0) internal successors, (2616), 6 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:44,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 436.0) internal successors, (2616), 6 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:44,666 INFO L175 Difference]: Start difference. First operand has 154 places, 226 transitions, 3316 flow. Second operand 5 states and 1210 transitions. [2022-12-13 10:57:44,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 300 transitions, 4094 flow [2022-12-13 10:57:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 300 transitions, 4031 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 10:57:44,869 INFO L231 Difference]: Finished difference. Result has 158 places, 230 transitions, 3613 flow [2022-12-13 10:57:44,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3613, PETRI_PLACES=158, PETRI_TRANSITIONS=230} [2022-12-13 10:57:44,869 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 42 predicate places. [2022-12-13 10:57:44,869 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 230 transitions, 3613 flow [2022-12-13 10:57:44,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 220.6) internal successors, (1103), 5 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:44,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:44,870 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:44,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 10:57:44,870 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1047162691, now seen corresponding path program 1 times [2022-12-13 10:57:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:44,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926110121] [2022-12-13 10:57:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:44,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:45,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926110121] [2022-12-13 10:57:45,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926110121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:45,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:45,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:57:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170882788] [2022-12-13 10:57:45,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:57:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:57:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:57:45,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 10:57:45,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 230 transitions, 3613 flow. Second operand has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:45,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:45,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 10:57:45,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:49,398 INFO L130 PetriNetUnfolder]: 22251/36924 cut-off events. [2022-12-13 10:57:49,398 INFO L131 PetriNetUnfolder]: For 206212/206316 co-relation queries the response was YES. [2022-12-13 10:57:49,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117971 conditions, 36924 events. 22251/36924 cut-off events. For 206212/206316 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 308646 event pairs, 6181 based on Foata normal form. 187/33833 useless extension candidates. Maximal degree in co-relation 117939. Up to 9700 conditions per place. [2022-12-13 10:57:49,650 INFO L137 encePairwiseOnDemand]: 419/436 looper letters, 282 selfloop transitions, 121 changer transitions 0/439 dead transitions. [2022-12-13 10:57:49,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 439 transitions, 6304 flow [2022-12-13 10:57:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:57:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 10:57:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2114 transitions. [2022-12-13 10:57:49,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5387359836901121 [2022-12-13 10:57:49,653 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2114 transitions. [2022-12-13 10:57:49,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2114 transitions. [2022-12-13 10:57:49,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:49,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2114 transitions. [2022-12-13 10:57:49,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 234.88888888888889) internal successors, (2114), 9 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:49,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:49,659 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:49,659 INFO L175 Difference]: Start difference. First operand has 158 places, 230 transitions, 3613 flow. Second operand 9 states and 2114 transitions. [2022-12-13 10:57:49,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 439 transitions, 6304 flow [2022-12-13 10:57:50,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 439 transitions, 6304 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 10:57:50,463 INFO L231 Difference]: Finished difference. Result has 171 places, 287 transitions, 5504 flow [2022-12-13 10:57:50,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5504, PETRI_PLACES=171, PETRI_TRANSITIONS=287} [2022-12-13 10:57:50,463 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 55 predicate places. [2022-12-13 10:57:50,463 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 287 transitions, 5504 flow [2022-12-13 10:57:50,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:50,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:50,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 10:57:50,464 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1283296284, now seen corresponding path program 1 times [2022-12-13 10:57:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:50,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745302201] [2022-12-13 10:57:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:50,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:50,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745302201] [2022-12-13 10:57:50,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745302201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:50,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:50,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:57:50,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215588113] [2022-12-13 10:57:50,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:50,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:57:50,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:50,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:57:50,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:57:50,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 10:57:50,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 287 transitions, 5504 flow. Second operand has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:50,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:50,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 10:57:50,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:57:56,325 INFO L130 PetriNetUnfolder]: 23396/39674 cut-off events. [2022-12-13 10:57:56,325 INFO L131 PetriNetUnfolder]: For 304993/305045 co-relation queries the response was YES. [2022-12-13 10:57:56,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134978 conditions, 39674 events. 23396/39674 cut-off events. For 304993/305045 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 340891 event pairs, 9511 based on Foata normal form. 183/36325 useless extension candidates. Maximal degree in co-relation 134941. Up to 19390 conditions per place. [2022-12-13 10:57:56,619 INFO L137 encePairwiseOnDemand]: 417/436 looper letters, 300 selfloop transitions, 194 changer transitions 0/530 dead transitions. [2022-12-13 10:57:56,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 530 transitions, 8491 flow [2022-12-13 10:57:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 10:57:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 10:57:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2798 transitions. [2022-12-13 10:57:56,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5347859327217125 [2022-12-13 10:57:56,629 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2798 transitions. [2022-12-13 10:57:56,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2798 transitions. [2022-12-13 10:57:56,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:57:56,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2798 transitions. [2022-12-13 10:57:56,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.16666666666666) internal successors, (2798), 12 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:56,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:56,645 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:56,646 INFO L175 Difference]: Start difference. First operand has 171 places, 287 transitions, 5504 flow. Second operand 12 states and 2798 transitions. [2022-12-13 10:57:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 530 transitions, 8491 flow [2022-12-13 10:57:57,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 530 transitions, 8443 flow, removed 19 selfloop flow, removed 1 redundant places. [2022-12-13 10:57:57,896 INFO L231 Difference]: Finished difference. Result has 187 places, 338 transitions, 7437 flow [2022-12-13 10:57:57,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7437, PETRI_PLACES=187, PETRI_TRANSITIONS=338} [2022-12-13 10:57:57,896 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 71 predicate places. [2022-12-13 10:57:57,896 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 338 transitions, 7437 flow [2022-12-13 10:57:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:57,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:57:57,897 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:57,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 10:57:57,897 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:57:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1936360091, now seen corresponding path program 1 times [2022-12-13 10:57:57,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:57,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379877246] [2022-12-13 10:57:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:57:58,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379877246] [2022-12-13 10:57:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379877246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:57:58,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:57:58,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 10:57:58,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182803394] [2022-12-13 10:57:58,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:58,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 10:57:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 10:57:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 10:57:58,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 436 [2022-12-13 10:57:58,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 338 transitions, 7437 flow. Second operand has 6 states, 6 states have (on average 217.83333333333334) internal successors, (1307), 6 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:57:58,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:57:58,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 436 [2022-12-13 10:57:58,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:06,246 INFO L130 PetriNetUnfolder]: 34371/57863 cut-off events. [2022-12-13 10:58:06,247 INFO L131 PetriNetUnfolder]: For 458237/458583 co-relation queries the response was YES. [2022-12-13 10:58:06,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191757 conditions, 57863 events. 34371/57863 cut-off events. For 458237/458583 co-relation queries the response was YES. Maximal size of possible extension queue 1545. Compared 524621 event pairs, 10735 based on Foata normal form. 77/51900 useless extension candidates. Maximal degree in co-relation 191714. Up to 17183 conditions per place. [2022-12-13 10:58:06,714 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 341 selfloop transitions, 102 changer transitions 0/497 dead transitions. [2022-12-13 10:58:06,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 497 transitions, 10127 flow [2022-12-13 10:58:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:58:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 10:58:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1455 transitions. [2022-12-13 10:58:06,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5561926605504587 [2022-12-13 10:58:06,716 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1455 transitions. [2022-12-13 10:58:06,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1455 transitions. [2022-12-13 10:58:06,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:06,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1455 transitions. [2022-12-13 10:58:06,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.5) internal successors, (1455), 6 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:06,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:06,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:06,720 INFO L175 Difference]: Start difference. First operand has 187 places, 338 transitions, 7437 flow. Second operand 6 states and 1455 transitions. [2022-12-13 10:58:06,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 497 transitions, 10127 flow [2022-12-13 10:58:08,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 497 transitions, 9789 flow, removed 114 selfloop flow, removed 3 redundant places. [2022-12-13 10:58:08,142 INFO L231 Difference]: Finished difference. Result has 192 places, 388 transitions, 8990 flow [2022-12-13 10:58:08,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8990, PETRI_PLACES=192, PETRI_TRANSITIONS=388} [2022-12-13 10:58:08,143 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 76 predicate places. [2022-12-13 10:58:08,143 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 388 transitions, 8990 flow [2022-12-13 10:58:08,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.83333333333334) internal successors, (1307), 6 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:08,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:08,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:08,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 10:58:08,143 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:58:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash 353994504, now seen corresponding path program 2 times [2022-12-13 10:58:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:08,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51684729] [2022-12-13 10:58:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:08,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51684729] [2022-12-13 10:58:08,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51684729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:58:08,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:58:08,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:58:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713262605] [2022-12-13 10:58:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:58:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:58:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:58:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:58:08,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 436 [2022-12-13 10:58:08,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 388 transitions, 8990 flow. Second operand has 7 states, 7 states have (on average 215.42857142857142) internal successors, (1508), 7 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:08,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:08,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 436 [2022-12-13 10:58:08,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:16,610 INFO L130 PetriNetUnfolder]: 34496/58240 cut-off events. [2022-12-13 10:58:16,611 INFO L131 PetriNetUnfolder]: For 464143/464495 co-relation queries the response was YES. [2022-12-13 10:58:16,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193687 conditions, 58240 events. 34496/58240 cut-off events. For 464143/464495 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 529011 event pairs, 9231 based on Foata normal form. 159/53059 useless extension candidates. Maximal degree in co-relation 193641. Up to 24315 conditions per place. [2022-12-13 10:58:17,108 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 254 selfloop transitions, 200 changer transitions 0/502 dead transitions. [2022-12-13 10:58:17,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 502 transitions, 10307 flow [2022-12-13 10:58:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 10:58:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 10:58:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1664 transitions. [2022-12-13 10:58:17,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.54521625163827 [2022-12-13 10:58:17,111 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1664 transitions. [2022-12-13 10:58:17,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1664 transitions. [2022-12-13 10:58:17,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:17,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1664 transitions. [2022-12-13 10:58:17,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 237.71428571428572) internal successors, (1664), 7 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:17,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 436.0) internal successors, (3488), 8 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:17,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 436.0) internal successors, (3488), 8 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:17,115 INFO L175 Difference]: Start difference. First operand has 192 places, 388 transitions, 8990 flow. Second operand 7 states and 1664 transitions. [2022-12-13 10:58:17,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 502 transitions, 10307 flow [2022-12-13 10:58:19,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 502 transitions, 10303 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 10:58:19,090 INFO L231 Difference]: Finished difference. Result has 196 places, 383 transitions, 9315 flow [2022-12-13 10:58:19,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=8915, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9315, PETRI_PLACES=196, PETRI_TRANSITIONS=383} [2022-12-13 10:58:19,090 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 80 predicate places. [2022-12-13 10:58:19,091 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 383 transitions, 9315 flow [2022-12-13 10:58:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.42857142857142) internal successors, (1508), 7 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:19,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:19,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:19,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 10:58:19,091 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:58:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:19,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1610919846, now seen corresponding path program 1 times [2022-12-13 10:58:19,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:19,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256480828] [2022-12-13 10:58:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:19,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:19,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256480828] [2022-12-13 10:58:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256480828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:58:19,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:58:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:58:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429223963] [2022-12-13 10:58:19,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:58:19,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:58:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:58:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:58:19,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 436 [2022-12-13 10:58:19,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 383 transitions, 9315 flow. Second operand has 7 states, 7 states have (on average 215.42857142857142) internal successors, (1508), 7 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:19,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:19,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 436 [2022-12-13 10:58:19,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:28,475 INFO L130 PetriNetUnfolder]: 36970/62537 cut-off events. [2022-12-13 10:58:28,475 INFO L131 PetriNetUnfolder]: For 620463/620779 co-relation queries the response was YES. [2022-12-13 10:58:28,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223459 conditions, 62537 events. 36970/62537 cut-off events. For 620463/620779 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 571607 event pairs, 11969 based on Foata normal form. 113/56536 useless extension candidates. Maximal degree in co-relation 223412. Up to 24315 conditions per place. [2022-12-13 10:58:29,028 INFO L137 encePairwiseOnDemand]: 421/436 looper letters, 339 selfloop transitions, 212 changer transitions 0/599 dead transitions. [2022-12-13 10:58:29,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 599 transitions, 13131 flow [2022-12-13 10:58:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:58:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 10:58:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2125 transitions. [2022-12-13 10:58:29,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5415392456676861 [2022-12-13 10:58:29,031 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2125 transitions. [2022-12-13 10:58:29,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2125 transitions. [2022-12-13 10:58:29,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:29,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2125 transitions. [2022-12-13 10:58:29,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.11111111111111) internal successors, (2125), 9 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:29,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:29,037 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:29,037 INFO L175 Difference]: Start difference. First operand has 196 places, 383 transitions, 9315 flow. Second operand 9 states and 2125 transitions. [2022-12-13 10:58:29,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 599 transitions, 13131 flow [2022-12-13 10:58:31,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 599 transitions, 12875 flow, removed 36 selfloop flow, removed 4 redundant places. [2022-12-13 10:58:31,708 INFO L231 Difference]: Finished difference. Result has 205 places, 449 transitions, 12120 flow [2022-12-13 10:58:31,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=9130, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12120, PETRI_PLACES=205, PETRI_TRANSITIONS=449} [2022-12-13 10:58:31,708 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 89 predicate places. [2022-12-13 10:58:31,708 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 449 transitions, 12120 flow [2022-12-13 10:58:31,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.42857142857142) internal successors, (1508), 7 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:31,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:31,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 10:58:31,709 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:58:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1308991275, now seen corresponding path program 2 times [2022-12-13 10:58:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:31,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382404348] [2022-12-13 10:58:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:31,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382404348] [2022-12-13 10:58:31,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382404348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:58:31,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:58:31,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 10:58:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662955471] [2022-12-13 10:58:31,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:58:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 10:58:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 10:58:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 10:58:32,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 10:58:32,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 449 transitions, 12120 flow. Second operand has 8 states, 8 states have (on average 213.25) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:32,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:32,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 10:58:32,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:44,244 INFO L130 PetriNetUnfolder]: 44544/73537 cut-off events. [2022-12-13 10:58:44,244 INFO L131 PetriNetUnfolder]: For 762030/762182 co-relation queries the response was YES. [2022-12-13 10:58:44,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268137 conditions, 73537 events. 44544/73537 cut-off events. For 762030/762182 co-relation queries the response was YES. Maximal size of possible extension queue 2069. Compared 667539 event pairs, 16615 based on Foata normal form. 141/67383 useless extension candidates. Maximal degree in co-relation 268086. Up to 38525 conditions per place. [2022-12-13 10:58:44,907 INFO L137 encePairwiseOnDemand]: 419/436 looper letters, 388 selfloop transitions, 343 changer transitions 0/775 dead transitions. [2022-12-13 10:58:44,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 775 transitions, 17073 flow [2022-12-13 10:58:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 10:58:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 10:58:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3260 transitions. [2022-12-13 10:58:44,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5340760157273918 [2022-12-13 10:58:44,911 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3260 transitions. [2022-12-13 10:58:44,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3260 transitions. [2022-12-13 10:58:44,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:58:44,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3260 transitions. [2022-12-13 10:58:44,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 232.85714285714286) internal successors, (3260), 14 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:44,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:44,919 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:44,919 INFO L175 Difference]: Start difference. First operand has 205 places, 449 transitions, 12120 flow. Second operand 14 states and 3260 transitions. [2022-12-13 10:58:44,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 775 transitions, 17073 flow [2022-12-13 10:58:47,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 775 transitions, 16884 flow, removed 26 selfloop flow, removed 1 redundant places. [2022-12-13 10:58:48,000 INFO L231 Difference]: Finished difference. Result has 223 places, 532 transitions, 15220 flow [2022-12-13 10:58:48,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=11799, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15220, PETRI_PLACES=223, PETRI_TRANSITIONS=532} [2022-12-13 10:58:48,001 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 107 predicate places. [2022-12-13 10:58:48,001 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 532 transitions, 15220 flow [2022-12-13 10:58:48,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 213.25) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:48,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:58:48,001 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 10:58:48,002 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:58:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash 779427323, now seen corresponding path program 3 times [2022-12-13 10:58:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:48,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293624550] [2022-12-13 10:58:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:48,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:58:48,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293624550] [2022-12-13 10:58:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293624550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:58:48,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:58:48,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:58:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856758401] [2022-12-13 10:58:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:58:48,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:58:48,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:58:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:58:48,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 436 [2022-12-13 10:58:48,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 532 transitions, 15220 flow. Second operand has 7 states, 7 states have (on average 215.42857142857142) internal successors, (1508), 7 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:58:48,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:58:48,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 436 [2022-12-13 10:58:48,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:58:59,892 INFO L130 PetriNetUnfolder]: 39115/66388 cut-off events. [2022-12-13 10:58:59,892 INFO L131 PetriNetUnfolder]: For 848295/848707 co-relation queries the response was YES. [2022-12-13 10:59:00,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257282 conditions, 66388 events. 39115/66388 cut-off events. For 848295/848707 co-relation queries the response was YES. Maximal size of possible extension queue 1824. Compared 616420 event pairs, 10450 based on Foata normal form. 77/59980 useless extension candidates. Maximal degree in co-relation 257225. Up to 24315 conditions per place. [2022-12-13 10:59:00,557 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 311 selfloop transitions, 288 changer transitions 0/657 dead transitions. [2022-12-13 10:59:00,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 657 transitions, 16830 flow [2022-12-13 10:59:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 10:59:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 10:59:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1892 transitions. [2022-12-13 10:59:00,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5424311926605505 [2022-12-13 10:59:00,559 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1892 transitions. [2022-12-13 10:59:00,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1892 transitions. [2022-12-13 10:59:00,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:00,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1892 transitions. [2022-12-13 10:59:00,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 236.5) internal successors, (1892), 8 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:00,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:00,564 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:00,564 INFO L175 Difference]: Start difference. First operand has 223 places, 532 transitions, 15220 flow. Second operand 8 states and 1892 transitions. [2022-12-13 10:59:00,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 657 transitions, 16830 flow [2022-12-13 10:59:03,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 657 transitions, 16566 flow, removed 71 selfloop flow, removed 4 redundant places. [2022-12-13 10:59:03,892 INFO L231 Difference]: Finished difference. Result has 223 places, 523 transitions, 15383 flow [2022-12-13 10:59:03,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=14807, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15383, PETRI_PLACES=223, PETRI_TRANSITIONS=523} [2022-12-13 10:59:03,893 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 107 predicate places. [2022-12-13 10:59:03,893 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 523 transitions, 15383 flow [2022-12-13 10:59:03,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.42857142857142) internal successors, (1508), 7 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:03,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:03,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:59:03,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 10:59:03,894 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:59:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1995154795, now seen corresponding path program 1 times [2022-12-13 10:59:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:03,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477806414] [2022-12-13 10:59:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477806414] [2022-12-13 10:59:04,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477806414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:04,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:04,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 10:59:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000914120] [2022-12-13 10:59:04,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:04,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 10:59:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 10:59:04,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 10:59:04,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 436 [2022-12-13 10:59:04,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 523 transitions, 15383 flow. Second operand has 9 states, 9 states have (on average 209.22222222222223) internal successors, (1883), 9 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:04,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:04,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 436 [2022-12-13 10:59:04,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:18,934 INFO L130 PetriNetUnfolder]: 50191/81344 cut-off events. [2022-12-13 10:59:18,934 INFO L131 PetriNetUnfolder]: For 910043/910059 co-relation queries the response was YES. [2022-12-13 10:59:19,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301151 conditions, 81344 events. 50191/81344 cut-off events. For 910043/910059 co-relation queries the response was YES. Maximal size of possible extension queue 2225. Compared 730494 event pairs, 11806 based on Foata normal form. 58/74688 useless extension candidates. Maximal degree in co-relation 301095. Up to 44992 conditions per place. [2022-12-13 10:59:19,743 INFO L137 encePairwiseOnDemand]: 417/436 looper letters, 416 selfloop transitions, 378 changer transitions 0/822 dead transitions. [2022-12-13 10:59:19,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 822 transitions, 19123 flow [2022-12-13 10:59:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 10:59:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 10:59:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4075 transitions. [2022-12-13 10:59:19,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5192405708460754 [2022-12-13 10:59:19,747 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4075 transitions. [2022-12-13 10:59:19,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4075 transitions. [2022-12-13 10:59:19,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:19,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4075 transitions. [2022-12-13 10:59:19,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 226.38888888888889) internal successors, (4075), 18 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:19,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 436.0) internal successors, (8284), 19 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:19,756 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 436.0) internal successors, (8284), 19 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:19,756 INFO L175 Difference]: Start difference. First operand has 223 places, 523 transitions, 15383 flow. Second operand 18 states and 4075 transitions. [2022-12-13 10:59:19,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 822 transitions, 19123 flow [2022-12-13 10:59:23,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 822 transitions, 18313 flow, removed 21 selfloop flow, removed 8 redundant places. [2022-12-13 10:59:23,426 INFO L231 Difference]: Finished difference. Result has 235 places, 553 transitions, 16273 flow [2022-12-13 10:59:23,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=14551, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=16273, PETRI_PLACES=235, PETRI_TRANSITIONS=553} [2022-12-13 10:59:23,427 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 119 predicate places. [2022-12-13 10:59:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 553 transitions, 16273 flow [2022-12-13 10:59:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 209.22222222222223) internal successors, (1883), 9 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:23,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:23,427 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:59:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 10:59:23,427 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:59:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1670949311, now seen corresponding path program 2 times [2022-12-13 10:59:23,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:23,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272874006] [2022-12-13 10:59:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:23,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:23,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272874006] [2022-12-13 10:59:23,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272874006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:23,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:23,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 10:59:23,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650028021] [2022-12-13 10:59:23,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:59:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:59:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:59:23,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 10:59:23,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 553 transitions, 16273 flow. Second operand has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:23,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:23,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 10:59:23,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:43,963 INFO L130 PetriNetUnfolder]: 75803/120651 cut-off events. [2022-12-13 10:59:43,963 INFO L131 PetriNetUnfolder]: For 1117119/1117241 co-relation queries the response was YES. [2022-12-13 10:59:44,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411488 conditions, 120651 events. 75803/120651 cut-off events. For 1117119/1117241 co-relation queries the response was YES. Maximal size of possible extension queue 3383. Compared 1122154 event pairs, 18836 based on Foata normal form. 212/111804 useless extension candidates. Maximal degree in co-relation 411431. Up to 41960 conditions per place. [2022-12-13 10:59:45,320 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 396 selfloop transitions, 332 changer transitions 0/779 dead transitions. [2022-12-13 10:59:45,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 779 transitions, 21137 flow [2022-12-13 10:59:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:59:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 10:59:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2104 transitions. [2022-12-13 10:59:45,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5361875637104995 [2022-12-13 10:59:45,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2104 transitions. [2022-12-13 10:59:45,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2104 transitions. [2022-12-13 10:59:45,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:45,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2104 transitions. [2022-12-13 10:59:45,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 233.77777777777777) internal successors, (2104), 9 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:45,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:45,327 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:45,327 INFO L175 Difference]: Start difference. First operand has 235 places, 553 transitions, 16273 flow. Second operand 9 states and 2104 transitions. [2022-12-13 10:59:45,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 779 transitions, 21137 flow [2022-12-13 10:59:52,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 779 transitions, 20867 flow, removed 64 selfloop flow, removed 3 redundant places. [2022-12-13 10:59:52,471 INFO L231 Difference]: Finished difference. Result has 244 places, 633 transitions, 20074 flow [2022-12-13 10:59:52,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=16025, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20074, PETRI_PLACES=244, PETRI_TRANSITIONS=633} [2022-12-13 10:59:52,472 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 128 predicate places. [2022-12-13 10:59:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 633 transitions, 20074 flow [2022-12-13 10:59:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:52,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:52,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:59:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 10:59:52,472 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 10:59:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1750761851, now seen corresponding path program 3 times [2022-12-13 10:59:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677854832] [2022-12-13 10:59:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:52,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677854832] [2022-12-13 10:59:52,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677854832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:52,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:52,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 10:59:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409468050] [2022-12-13 10:59:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 10:59:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 10:59:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 10:59:52,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 436 [2022-12-13 10:59:52,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 633 transitions, 20074 flow. Second operand has 8 states, 8 states have (on average 211.25) internal successors, (1690), 8 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:52,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:52,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 436 [2022-12-13 10:59:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:13,026 INFO L130 PetriNetUnfolder]: 66827/106711 cut-off events. [2022-12-13 11:00:13,026 INFO L131 PetriNetUnfolder]: For 1264234/1264462 co-relation queries the response was YES. [2022-12-13 11:00:13,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394914 conditions, 106711 events. 66827/106711 cut-off events. For 1264234/1264462 co-relation queries the response was YES. Maximal size of possible extension queue 2885. Compared 982063 event pairs, 30340 based on Foata normal form. 54/96603 useless extension candidates. Maximal degree in co-relation 394853. Up to 45278 conditions per place. [2022-12-13 11:00:14,196 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 465 selfloop transitions, 365 changer transitions 0/884 dead transitions. [2022-12-13 11:00:14,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 884 transitions, 23683 flow [2022-12-13 11:00:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:00:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:00:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2992 transitions. [2022-12-13 11:00:14,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5278757939308398 [2022-12-13 11:00:14,200 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2992 transitions. [2022-12-13 11:00:14,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2992 transitions. [2022-12-13 11:00:14,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:14,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2992 transitions. [2022-12-13 11:00:14,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 230.15384615384616) internal successors, (2992), 13 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:14,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 436.0) internal successors, (6104), 14 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:14,207 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 436.0) internal successors, (6104), 14 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:14,207 INFO L175 Difference]: Start difference. First operand has 244 places, 633 transitions, 20074 flow. Second operand 13 states and 2992 transitions. [2022-12-13 11:00:14,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 884 transitions, 23683 flow [2022-12-13 11:00:23,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 884 transitions, 23638 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-12-13 11:00:23,096 INFO L231 Difference]: Finished difference. Result has 258 places, 677 transitions, 22410 flow [2022-12-13 11:00:23,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=20033, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22410, PETRI_PLACES=258, PETRI_TRANSITIONS=677} [2022-12-13 11:00:23,097 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 142 predicate places. [2022-12-13 11:00:23,097 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 677 transitions, 22410 flow [2022-12-13 11:00:23,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 211.25) internal successors, (1690), 8 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:23,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:23,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 11:00:23,098 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:00:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash 716687915, now seen corresponding path program 1 times [2022-12-13 11:00:23,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:23,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880775802] [2022-12-13 11:00:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:23,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:00:23,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880775802] [2022-12-13 11:00:23,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880775802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:23,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:23,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:00:23,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74245768] [2022-12-13 11:00:23,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:23,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:00:23,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:00:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:00:23,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 436 [2022-12-13 11:00:23,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 677 transitions, 22410 flow. Second operand has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:23,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:23,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 436 [2022-12-13 11:00:23,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:48,587 INFO L130 PetriNetUnfolder]: 79560/128906 cut-off events. [2022-12-13 11:00:48,587 INFO L131 PetriNetUnfolder]: For 1532336/1532762 co-relation queries the response was YES. [2022-12-13 11:00:49,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455129 conditions, 128906 events. 79560/128906 cut-off events. For 1532336/1532762 co-relation queries the response was YES. Maximal size of possible extension queue 3725. Compared 1238412 event pairs, 43860 based on Foata normal form. 59/115834 useless extension candidates. Maximal degree in co-relation 455065. Up to 35508 conditions per place. [2022-12-13 11:00:50,238 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 520 selfloop transitions, 178 changer transitions 0/798 dead transitions. [2022-12-13 11:00:50,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 798 transitions, 24595 flow [2022-12-13 11:00:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:00:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:00:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1453 transitions. [2022-12-13 11:00:50,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5554281345565749 [2022-12-13 11:00:50,344 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1453 transitions. [2022-12-13 11:00:50,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1453 transitions. [2022-12-13 11:00:50,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:50,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1453 transitions. [2022-12-13 11:00:50,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.16666666666666) internal successors, (1453), 6 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:50,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:50,349 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:50,349 INFO L175 Difference]: Start difference. First operand has 258 places, 677 transitions, 22410 flow. Second operand 6 states and 1453 transitions. [2022-12-13 11:00:50,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 798 transitions, 24595 flow [2022-12-13 11:01:01,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 798 transitions, 24567 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-12-13 11:01:01,048 INFO L231 Difference]: Finished difference. Result has 265 places, 691 transitions, 23485 flow [2022-12-13 11:01:01,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=22382, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=23485, PETRI_PLACES=265, PETRI_TRANSITIONS=691} [2022-12-13 11:01:01,049 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 149 predicate places. [2022-12-13 11:01:01,049 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 691 transitions, 23485 flow [2022-12-13 11:01:01,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:01,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:01,049 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 11:01:01,050 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:01:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash -967958553, now seen corresponding path program 4 times [2022-12-13 11:01:01,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:01,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845753981] [2022-12-13 11:01:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:01,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:01:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845753981] [2022-12-13 11:01:01,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845753981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:01:01,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:01:01,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 11:01:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853907361] [2022-12-13 11:01:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:01:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:01:01,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:01:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:01:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:01:01,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 11:01:01,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 691 transitions, 23485 flow. Second operand has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:01,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:01,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 11:01:01,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:01:30,473 INFO L130 PetriNetUnfolder]: 93191/146496 cut-off events. [2022-12-13 11:01:30,473 INFO L131 PetriNetUnfolder]: For 1704203/1704397 co-relation queries the response was YES. [2022-12-13 11:01:31,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508985 conditions, 146496 events. 93191/146496 cut-off events. For 1704203/1704397 co-relation queries the response was YES. Maximal size of possible extension queue 4242. Compared 1371401 event pairs, 35410 based on Foata normal form. 284/134224 useless extension candidates. Maximal degree in co-relation 508919. Up to 97056 conditions per place. [2022-12-13 11:01:32,291 INFO L137 encePairwiseOnDemand]: 421/436 looper letters, 372 selfloop transitions, 452 changer transitions 0/875 dead transitions. [2022-12-13 11:01:32,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 875 transitions, 26246 flow [2022-12-13 11:01:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:01:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:01:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2560 transitions. [2022-12-13 11:01:32,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5337781484570475 [2022-12-13 11:01:32,295 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2560 transitions. [2022-12-13 11:01:32,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2560 transitions. [2022-12-13 11:01:32,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:01:32,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2560 transitions. [2022-12-13 11:01:32,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 232.72727272727272) internal successors, (2560), 11 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:32,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:32,301 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:32,301 INFO L175 Difference]: Start difference. First operand has 265 places, 691 transitions, 23485 flow. Second operand 11 states and 2560 transitions. [2022-12-13 11:01:32,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 875 transitions, 26246 flow [2022-12-13 11:01:45,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 875 transitions, 26180 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:01:45,625 INFO L231 Difference]: Finished difference. Result has 276 places, 706 transitions, 25312 flow [2022-12-13 11:01:45,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=23419, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=25312, PETRI_PLACES=276, PETRI_TRANSITIONS=706} [2022-12-13 11:01:45,626 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 160 predicate places. [2022-12-13 11:01:45,626 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 706 transitions, 25312 flow [2022-12-13 11:01:45,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:45,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:45,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:45,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 11:01:45,626 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:01:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:45,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1383364477, now seen corresponding path program 5 times [2022-12-13 11:01:45,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:45,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075888253] [2022-12-13 11:01:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:45,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:01:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075888253] [2022-12-13 11:01:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075888253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:01:45,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:01:45,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 11:01:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348430070] [2022-12-13 11:01:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:01:45,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:01:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:01:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:01:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:01:45,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 436 [2022-12-13 11:01:45,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 706 transitions, 25312 flow. Second operand has 8 states, 8 states have (on average 209.5) internal successors, (1676), 8 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:01:45,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:45,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 436 [2022-12-13 11:01:45,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:02:17,239 INFO L130 PetriNetUnfolder]: 94632/148286 cut-off events. [2022-12-13 11:02:17,239 INFO L131 PetriNetUnfolder]: For 2002098/2002154 co-relation queries the response was YES. [2022-12-13 11:02:18,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535054 conditions, 148286 events. 94632/148286 cut-off events. For 2002098/2002154 co-relation queries the response was YES. Maximal size of possible extension queue 4199. Compared 1381623 event pairs, 45188 based on Foata normal form. 142/134972 useless extension candidates. Maximal degree in co-relation 534985. Up to 42772 conditions per place. [2022-12-13 11:02:19,208 INFO L137 encePairwiseOnDemand]: 420/436 looper letters, 503 selfloop transitions, 389 changer transitions 0/934 dead transitions. [2022-12-13 11:02:19,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 934 transitions, 29026 flow [2022-12-13 11:02:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:02:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:02:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2542 transitions. [2022-12-13 11:02:19,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5300250208507089 [2022-12-13 11:02:19,211 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2542 transitions. [2022-12-13 11:02:19,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2542 transitions. [2022-12-13 11:02:19,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:02:19,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2542 transitions. [2022-12-13 11:02:19,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.0909090909091) internal successors, (2542), 11 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:02:19,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:02:19,218 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:02:19,218 INFO L175 Difference]: Start difference. First operand has 276 places, 706 transitions, 25312 flow. Second operand 11 states and 2542 transitions. [2022-12-13 11:02:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 934 transitions, 29026 flow [2022-12-13 11:02:36,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 934 transitions, 28772 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-12-13 11:02:36,080 INFO L231 Difference]: Finished difference. Result has 286 places, 735 transitions, 27650 flow [2022-12-13 11:02:36,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=25082, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=27650, PETRI_PLACES=286, PETRI_TRANSITIONS=735} [2022-12-13 11:02:36,081 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 170 predicate places. [2022-12-13 11:02:36,081 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 735 transitions, 27650 flow [2022-12-13 11:02:36,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 209.5) internal successors, (1676), 8 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:02:36,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:02:36,082 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:02:36,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 11:02:36,082 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:02:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:02:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash 920025245, now seen corresponding path program 2 times [2022-12-13 11:02:36,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:02:36,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108662272] [2022-12-13 11:02:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:02:36,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:02:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:02:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:02:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:02:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108662272] [2022-12-13 11:02:36,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108662272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:02:36,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:02:36,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 11:02:36,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736601389] [2022-12-13 11:02:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:02:36,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:02:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:02:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:02:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:02:36,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 436 [2022-12-13 11:02:36,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 735 transitions, 27650 flow. Second operand has 7 states, 7 states have (on average 215.57142857142858) internal successors, (1509), 7 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:02:36,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:02:36,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 436 [2022-12-13 11:02:36,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:03:08,289 INFO L130 PetriNetUnfolder]: 84283/135681 cut-off events. [2022-12-13 11:03:08,289 INFO L131 PetriNetUnfolder]: For 2328420/2328698 co-relation queries the response was YES. [2022-12-13 11:03:09,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530065 conditions, 135681 events. 84283/135681 cut-off events. For 2328420/2328698 co-relation queries the response was YES. Maximal size of possible extension queue 3726. Compared 1296276 event pairs, 36297 based on Foata normal form. 77/123818 useless extension candidates. Maximal degree in co-relation 529992. Up to 54675 conditions per place. [2022-12-13 11:03:10,129 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 459 selfloop transitions, 367 changer transitions 0/924 dead transitions. [2022-12-13 11:03:10,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 924 transitions, 32428 flow [2022-12-13 11:03:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:03:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:03:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1894 transitions. [2022-12-13 11:03:10,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5430045871559633 [2022-12-13 11:03:10,132 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1894 transitions. [2022-12-13 11:03:10,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1894 transitions. [2022-12-13 11:03:10,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:03:10,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1894 transitions. [2022-12-13 11:03:10,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 236.75) internal successors, (1894), 8 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:03:10,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:03:10,136 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:03:10,137 INFO L175 Difference]: Start difference. First operand has 286 places, 735 transitions, 27650 flow. Second operand 8 states and 1894 transitions. [2022-12-13 11:03:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 924 transitions, 32428 flow [2022-12-13 11:03:32,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 924 transitions, 32336 flow, removed 18 selfloop flow, removed 5 redundant places. [2022-12-13 11:03:32,759 INFO L231 Difference]: Finished difference. Result has 290 places, 783 transitions, 31009 flow [2022-12-13 11:03:32,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=27558, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=31009, PETRI_PLACES=290, PETRI_TRANSITIONS=783} [2022-12-13 11:03:32,760 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 174 predicate places. [2022-12-13 11:03:32,760 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 783 transitions, 31009 flow [2022-12-13 11:03:32,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.57142857142858) internal successors, (1509), 7 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:03:32,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:03:32,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:03:32,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 11:03:32,761 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:03:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:03:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1068967157, now seen corresponding path program 3 times [2022-12-13 11:03:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:03:32,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554014447] [2022-12-13 11:03:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:03:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:03:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:03:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:03:32,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:03:32,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554014447] [2022-12-13 11:03:32,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554014447] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:03:32,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:03:32,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 11:03:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89482541] [2022-12-13 11:03:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:03:32,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:03:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:03:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:03:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:03:33,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 11:03:33,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 783 transitions, 31009 flow. Second operand has 8 states, 8 states have (on average 213.375) internal successors, (1707), 8 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:03:33,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:03:33,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 11:03:33,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:04:10,749 INFO L130 PetriNetUnfolder]: 97269/153453 cut-off events. [2022-12-13 11:04:10,749 INFO L131 PetriNetUnfolder]: For 2644525/2644605 co-relation queries the response was YES. [2022-12-13 11:04:12,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591035 conditions, 153453 events. 97269/153453 cut-off events. For 2644525/2644605 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 1441836 event pairs, 49253 based on Foata normal form. 110/141200 useless extension candidates. Maximal degree in co-relation 590960. Up to 97761 conditions per place. [2022-12-13 11:04:12,891 INFO L137 encePairwiseOnDemand]: 421/436 looper letters, 449 selfloop transitions, 521 changer transitions 0/1022 dead transitions. [2022-12-13 11:04:12,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1022 transitions, 34586 flow [2022-12-13 11:04:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:04:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:04:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3244 transitions. [2022-12-13 11:04:12,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5314547837483617 [2022-12-13 11:04:12,897 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3244 transitions. [2022-12-13 11:04:12,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3244 transitions. [2022-12-13 11:04:12,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:04:12,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3244 transitions. [2022-12-13 11:04:12,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 231.71428571428572) internal successors, (3244), 14 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:04:12,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:04:12,907 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:04:12,907 INFO L175 Difference]: Start difference. First operand has 290 places, 783 transitions, 31009 flow. Second operand 14 states and 3244 transitions. [2022-12-13 11:04:12,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1022 transitions, 34586 flow [2022-12-13 11:04:37,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1022 transitions, 34434 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:04:37,252 INFO L231 Difference]: Finished difference. Result has 303 places, 796 transitions, 32563 flow [2022-12-13 11:04:37,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=30860, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=32563, PETRI_PLACES=303, PETRI_TRANSITIONS=796} [2022-12-13 11:04:37,253 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 187 predicate places. [2022-12-13 11:04:37,253 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 796 transitions, 32563 flow [2022-12-13 11:04:37,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 213.375) internal successors, (1707), 8 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:04:37,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:04:37,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:04:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 11:04:37,253 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:04:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:04:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash 203076335, now seen corresponding path program 6 times [2022-12-13 11:04:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:04:37,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068912855] [2022-12-13 11:04:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:04:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:04:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:04:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:04:37,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:04:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068912855] [2022-12-13 11:04:37,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068912855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:04:37,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:04:37,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 11:04:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348207369] [2022-12-13 11:04:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:04:37,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:04:37,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:04:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:04:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:04:37,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 436 [2022-12-13 11:04:37,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 796 transitions, 32563 flow. Second operand has 8 states, 8 states have (on average 211.25) internal successors, (1690), 8 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:04:37,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:04:37,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 436 [2022-12-13 11:04:37,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:05:13,810 INFO L130 PetriNetUnfolder]: 84551/135817 cut-off events. [2022-12-13 11:05:13,810 INFO L131 PetriNetUnfolder]: For 2797312/2797674 co-relation queries the response was YES. [2022-12-13 11:05:15,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552098 conditions, 135817 events. 84551/135817 cut-off events. For 2797312/2797674 co-relation queries the response was YES. Maximal size of possible extension queue 3692. Compared 1296695 event pairs, 42426 based on Foata normal form. 100/122645 useless extension candidates. Maximal degree in co-relation 552021. Up to 36052 conditions per place. [2022-12-13 11:05:16,009 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 498 selfloop transitions, 420 changer transitions 0/989 dead transitions. [2022-12-13 11:05:16,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 989 transitions, 35186 flow [2022-12-13 11:05:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:05:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:05:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2344 transitions. [2022-12-13 11:05:16,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5376146788990825 [2022-12-13 11:05:16,012 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2344 transitions. [2022-12-13 11:05:16,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2344 transitions. [2022-12-13 11:05:16,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:05:16,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2344 transitions. [2022-12-13 11:05:16,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 234.4) internal successors, (2344), 10 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:05:16,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:05:16,018 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:05:16,018 INFO L175 Difference]: Start difference. First operand has 303 places, 796 transitions, 32563 flow. Second operand 10 states and 2344 transitions. [2022-12-13 11:05:16,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 989 transitions, 35186 flow [2022-12-13 11:05:34,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 989 transitions, 34867 flow, removed 40 selfloop flow, removed 6 redundant places. [2022-12-13 11:05:34,769 INFO L231 Difference]: Finished difference. Result has 304 places, 793 transitions, 33019 flow [2022-12-13 11:05:34,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=32159, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=33019, PETRI_PLACES=304, PETRI_TRANSITIONS=793} [2022-12-13 11:05:34,770 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 188 predicate places. [2022-12-13 11:05:34,770 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 793 transitions, 33019 flow [2022-12-13 11:05:34,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 211.25) internal successors, (1690), 8 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:05:34,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:05:34,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:05:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 11:05:34,771 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:05:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:05:34,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1428184831, now seen corresponding path program 4 times [2022-12-13 11:05:34,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:05:34,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271125506] [2022-12-13 11:05:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:05:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:05:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:05:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:05:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:05:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271125506] [2022-12-13 11:05:34,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271125506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:05:34,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:05:34,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 11:05:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716451735] [2022-12-13 11:05:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:05:34,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:05:34,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:05:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:05:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:05:35,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 436 [2022-12-13 11:05:35,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 793 transitions, 33019 flow. Second operand has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:05:35,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:05:35,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 436 [2022-12-13 11:05:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:06:12,491 INFO L130 PetriNetUnfolder]: 97837/154249 cut-off events. [2022-12-13 11:06:12,491 INFO L131 PetriNetUnfolder]: For 2957121/2957207 co-relation queries the response was YES. [2022-12-13 11:06:14,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610647 conditions, 154249 events. 97837/154249 cut-off events. For 2957121/2957207 co-relation queries the response was YES. Maximal size of possible extension queue 4278. Compared 1451159 event pairs, 44322 based on Foata normal form. 95/141132 useless extension candidates. Maximal degree in co-relation 610571. Up to 64857 conditions per place. [2022-12-13 11:06:14,830 INFO L137 encePairwiseOnDemand]: 421/436 looper letters, 493 selfloop transitions, 420 changer transitions 0/965 dead transitions. [2022-12-13 11:06:14,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 965 transitions, 36844 flow [2022-12-13 11:06:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:06:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:06:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2104 transitions. [2022-12-13 11:06:14,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5361875637104995 [2022-12-13 11:06:14,833 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2104 transitions. [2022-12-13 11:06:14,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2104 transitions. [2022-12-13 11:06:14,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:06:14,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2104 transitions. [2022-12-13 11:06:14,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 233.77777777777777) internal successors, (2104), 9 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:06:14,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:06:14,839 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:06:14,840 INFO L175 Difference]: Start difference. First operand has 304 places, 793 transitions, 33019 flow. Second operand 9 states and 2104 transitions. [2022-12-13 11:06:14,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 965 transitions, 36844 flow [2022-12-13 11:06:42,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 965 transitions, 36518 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-12-13 11:06:42,050 INFO L231 Difference]: Finished difference. Result has 307 places, 813 transitions, 35183 flow [2022-12-13 11:06:42,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=32635, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=35183, PETRI_PLACES=307, PETRI_TRANSITIONS=813} [2022-12-13 11:06:42,050 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 191 predicate places. [2022-12-13 11:06:42,050 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 813 transitions, 35183 flow [2022-12-13 11:06:42,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:06:42,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:06:42,051 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:06:42,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 11:06:42,051 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:06:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:06:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1405905147, now seen corresponding path program 1 times [2022-12-13 11:06:42,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:06:42,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169913440] [2022-12-13 11:06:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:06:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:06:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:06:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:06:42,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:06:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169913440] [2022-12-13 11:06:42,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169913440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:06:42,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:06:42,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 11:06:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129841021] [2022-12-13 11:06:42,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:06:42,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:06:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:06:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:06:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:06:42,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 436 [2022-12-13 11:06:42,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 813 transitions, 35183 flow. Second operand has 12 states, 12 states have (on average 202.16666666666666) internal successors, (2426), 12 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:06:42,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:06:42,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 436 [2022-12-13 11:06:42,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:07:19,601 INFO L130 PetriNetUnfolder]: 92466/147877 cut-off events. [2022-12-13 11:07:19,601 INFO L131 PetriNetUnfolder]: For 3181426/3181968 co-relation queries the response was YES. [2022-12-13 11:07:21,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603507 conditions, 147877 events. 92466/147877 cut-off events. For 3181426/3181968 co-relation queries the response was YES. Maximal size of possible extension queue 4210. Compared 1409237 event pairs, 52728 based on Foata normal form. 25/134305 useless extension candidates. Maximal degree in co-relation 603432. Up to 81399 conditions per place. [2022-12-13 11:07:21,754 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 535 selfloop transitions, 473 changer transitions 0/1086 dead transitions. [2022-12-13 11:07:21,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1086 transitions, 40030 flow [2022-12-13 11:07:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:07:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:07:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3074 transitions. [2022-12-13 11:07:21,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5036041939711664 [2022-12-13 11:07:21,757 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3074 transitions. [2022-12-13 11:07:21,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3074 transitions. [2022-12-13 11:07:21,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:07:21,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3074 transitions. [2022-12-13 11:07:21,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 219.57142857142858) internal successors, (3074), 14 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:21,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:21,767 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:21,767 INFO L175 Difference]: Start difference. First operand has 307 places, 813 transitions, 35183 flow. Second operand 14 states and 3074 transitions. [2022-12-13 11:07:21,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1086 transitions, 40030 flow [2022-12-13 11:07:41,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1086 transitions, 39923 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:07:41,856 INFO L231 Difference]: Finished difference. Result has 324 places, 832 transitions, 37530 flow [2022-12-13 11:07:41,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=35085, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=37530, PETRI_PLACES=324, PETRI_TRANSITIONS=832} [2022-12-13 11:07:41,856 INFO L288 CegarLoopForPetriNet]: 116 programPoint places, 208 predicate places. [2022-12-13 11:07:41,856 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 832 transitions, 37530 flow [2022-12-13 11:07:41,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 202.16666666666666) internal successors, (2426), 12 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:41,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:07:41,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:41,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 11:07:41,857 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 11:07:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1359834318, now seen corresponding path program 1 times [2022-12-13 11:07:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245968444] [2022-12-13 11:07:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:41,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:07:42,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:42,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245968444] [2022-12-13 11:07:42,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245968444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:42,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:07:42,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 11:07:42,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834199791] [2022-12-13 11:07:42,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:42,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:07:42,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:07:42,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:07:42,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 436 [2022-12-13 11:07:42,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 832 transitions, 37530 flow. Second operand has 12 states, 12 states have (on average 202.0) internal successors, (2424), 12 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:42,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:07:42,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 436 [2022-12-13 11:07:42,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand