./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R --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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- 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-38b53e6 [2022-11-25 18:30:40,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:30:40,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:30:40,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:30:40,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:30:40,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:30:40,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:30:40,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:30:40,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:30:40,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:30:40,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:30:40,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:30:40,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:30:40,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:30:40,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:30:40,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:30:40,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:30:40,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:30:40,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:30:40,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:30:40,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:30:40,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:30:40,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:30:40,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:30:40,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:30:40,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:30:40,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:30:40,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:30:40,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:30:40,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:30:40,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:30:40,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:30:40,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:30:40,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:30:40,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:30:40,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:30:40,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:30:40,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:30:40,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:30:40,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:30:40,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:30:40,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:30:40,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:30:40,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:30:40,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:30:40,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:30:40,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:30:40,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:30:40,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:30:40,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:30:40,325 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:30:40,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:30:40,325 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:30:40,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:30:40,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:30:40,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:30:40,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:30:40,327 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:30:40,327 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:30:40,327 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:30:40,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:30:40,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:30:40,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:30:40,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:30:40,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:30:40,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:30:40,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:30:40,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:40,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:30:40,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:30:40,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:30:40,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:30:40,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:30:40,330 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:30:40,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:30:40,331 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2022-11-25 18:30:40,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:30:40,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:30:40,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:30:40,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:30:40,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:30:40,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/queue_longest.i [2022-11-25 18:30:43,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:30:44,053 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:30:44,057 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i [2022-11-25 18:30:44,071 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/data/9271261cc/47702305b24940d4b5d821423911c044/FLAG8d9b1f015 [2022-11-25 18:30:44,346 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/data/9271261cc/47702305b24940d4b5d821423911c044 [2022-11-25 18:30:44,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:30:44,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:30:44,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:44,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:30:44,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:30:44,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:44" (1/1) ... [2022-11-25 18:30:44,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32fdb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:44, skipping insertion in model container [2022-11-25 18:30:44,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:44" (1/1) ... [2022-11-25 18:30:44,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:30:44,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:30:44,935 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-11-25 18:30:44,945 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-11-25 18:30:44,951 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-11-25 18:30:44,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:44,965 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:30:45,029 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-11-25 18:30:45,031 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-11-25 18:30:45,034 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_84f1a57b-498d-4ff6-b9cc-72410d05171d/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-11-25 18:30:45,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:45,085 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:30:45,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45 WrapperNode [2022-11-25 18:30:45,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:45,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:30:45,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:30:45,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:30:45,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,175 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-11-25 18:30:45,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:30:45,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:30:45,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:30:45,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:30:45,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,238 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:30:45,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:30:45,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:30:45,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:30:45,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (1/1) ... [2022-11-25 18:30:45,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:45,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:30:45,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:30:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 18:30:45,331 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 18:30:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 18:30:45,331 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 18:30:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:30:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:30:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:30:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:30:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:30:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:30:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:30:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:30:45,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:30:45,334 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:30:45,481 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:30:45,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:30:46,284 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:30:46,294 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:30:46,294 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:30:46,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:46 BoogieIcfgContainer [2022-11-25 18:30:46,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:30:46,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:30:46,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:30:46,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:30:46,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:30:44" (1/3) ... [2022-11-25 18:30:46,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eafc5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:46, skipping insertion in model container [2022-11-25 18:30:46,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:45" (2/3) ... [2022-11-25 18:30:46,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eafc5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:46, skipping insertion in model container [2022-11-25 18:30:46,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:46" (3/3) ... [2022-11-25 18:30:46,306 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2022-11-25 18:30:46,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:30:46,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-11-25 18:30:46,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:30:46,454 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:30:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 352 transitions, 720 flow [2022-11-25 18:30:46,701 INFO L130 PetriNetUnfolder]: 15/350 cut-off events. [2022-11-25 18:30:46,702 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:30:46,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 350 events. 15/350 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 765 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 251. Up to 2 conditions per place. [2022-11-25 18:30:46,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 352 transitions, 720 flow [2022-11-25 18:30:46,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 345 transitions, 702 flow [2022-11-25 18:30:46,726 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:30:46,742 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 345 transitions, 702 flow [2022-11-25 18:30:46,745 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 345 transitions, 702 flow [2022-11-25 18:30:46,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 345 transitions, 702 flow [2022-11-25 18:30:46,840 INFO L130 PetriNetUnfolder]: 15/345 cut-off events. [2022-11-25 18:30:46,840 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:30:46,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 345 events. 15/345 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 751 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 251. Up to 2 conditions per place. [2022-11-25 18:30:46,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-11-25 18:31:08,591 INFO L134 LiptonReduction]: Checked pairs total: 102084 [2022-11-25 18:31:08,591 INFO L136 LiptonReduction]: Total number of compositions: 572 [2022-11-25 18:31:08,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:31:08,631 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;@52e2404f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:31:08,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-11-25 18:31:08,634 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:31:08,634 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:08,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:08,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:31:08,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1586, now seen corresponding path program 1 times [2022-11-25 18:31:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:08,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541421838] [2022-11-25 18:31:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:08,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541421838] [2022-11-25 18:31:08,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541421838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:08,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:08,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:31:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293726604] [2022-11-25 18:31:08,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:08,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:31:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:31:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:31:08,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 924 [2022-11-25 18:31:08,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 339.5) internal successors, (679), 2 states have internal predecessors, (679), 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) [2022-11-25 18:31:08,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:08,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 924 [2022-11-25 18:31:08,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:10,533 INFO L130 PetriNetUnfolder]: 7199/11439 cut-off events. [2022-11-25 18:31:10,534 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-25 18:31:10,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22424 conditions, 11439 events. 7199/11439 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 67111 event pairs, 6307 based on Foata normal form. 92/5809 useless extension candidates. Maximal degree in co-relation 22027. Up to 10875 conditions per place. [2022-11-25 18:31:10,677 INFO L137 encePairwiseOnDemand]: 875/924 looper letters, 82 selfloop transitions, 0 changer transitions 0/90 dead transitions. [2022-11-25 18:31:10,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 356 flow [2022-11-25 18:31:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:31:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:31:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 809 transitions. [2022-11-25 18:31:10,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43777056277056275 [2022-11-25 18:31:10,701 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 809 transitions. [2022-11-25 18:31:10,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 809 transitions. [2022-11-25 18:31:10,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:10,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 809 transitions. [2022-11-25 18:31:10,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 404.5) internal successors, (809), 2 states have internal predecessors, (809), 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) [2022-11-25 18:31:10,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 924.0) internal successors, (2772), 3 states have internal predecessors, (2772), 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) [2022-11-25 18:31:10,733 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 924.0) internal successors, (2772), 3 states have internal predecessors, (2772), 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) [2022-11-25 18:31:10,735 INFO L175 Difference]: Start difference. First operand has 136 places, 139 transitions, 290 flow. Second operand 2 states and 809 transitions. [2022-11-25 18:31:10,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 356 flow [2022-11-25 18:31:10,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 348 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:31:10,746 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 184 flow [2022-11-25 18:31:10,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2022-11-25 18:31:10,752 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -50 predicate places. [2022-11-25 18:31:10,752 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 184 flow [2022-11-25 18:31:10,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 339.5) internal successors, (679), 2 states have internal predecessors, (679), 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) [2022-11-25 18:31:10,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:10,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:31:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:31:10,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1575924, now seen corresponding path program 1 times [2022-11-25 18:31:10,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:10,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728390297] [2022-11-25 18:31:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:10,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:10,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728390297] [2022-11-25 18:31:10,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728390297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:10,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:10,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780259031] [2022-11-25 18:31:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:10,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:10,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:10,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:10,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:11,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 924 [2022-11-25 18:31:11,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2022-11-25 18:31:11,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:11,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 924 [2022-11-25 18:31:11,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:12,513 INFO L130 PetriNetUnfolder]: 7131/11303 cut-off events. [2022-11-25 18:31:12,514 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:12,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22092 conditions, 11303 events. 7131/11303 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 66012 event pairs, 6246 based on Foata normal form. 0/5676 useless extension candidates. Maximal degree in co-relation 22089. Up to 10743 conditions per place. [2022-11-25 18:31:12,574 INFO L137 encePairwiseOnDemand]: 920/924 looper letters, 78 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2022-11-25 18:31:12,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 88 transitions, 340 flow [2022-11-25 18:31:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1072 transitions. [2022-11-25 18:31:12,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38672438672438675 [2022-11-25 18:31:12,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1072 transitions. [2022-11-25 18:31:12,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1072 transitions. [2022-11-25 18:31:12,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:12,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1072 transitions. [2022-11-25 18:31:12,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.3333333333333) internal successors, (1072), 3 states have internal predecessors, (1072), 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) [2022-11-25 18:31:12,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:12,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:12,591 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 184 flow. Second operand 3 states and 1072 transitions. [2022-11-25 18:31:12,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 88 transitions, 340 flow [2022-11-25 18:31:12,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:31:12,594 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 184 flow [2022-11-25 18:31:12,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2022-11-25 18:31:12,595 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -50 predicate places. [2022-11-25 18:31:12,595 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 184 flow [2022-11-25 18:31:12,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2022-11-25 18:31:12,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:12,596 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:31:12,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:31:12,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1575925, now seen corresponding path program 1 times [2022-11-25 18:31:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799218766] [2022-11-25 18:31:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:12,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799218766] [2022-11-25 18:31:12,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799218766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:12,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:12,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176485834] [2022-11-25 18:31:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:12,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:12,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:12,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:13,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 924 [2022-11-25 18:31:13,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 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) [2022-11-25 18:31:13,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:13,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 924 [2022-11-25 18:31:13,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:14,392 INFO L130 PetriNetUnfolder]: 7063/11167 cut-off events. [2022-11-25 18:31:14,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:14,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21829 conditions, 11167 events. 7063/11167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 64808 event pairs, 6185 based on Foata normal form. 0/5635 useless extension candidates. Maximal degree in co-relation 21825. Up to 10613 conditions per place. [2022-11-25 18:31:14,456 INFO L137 encePairwiseOnDemand]: 920/924 looper letters, 76 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-11-25 18:31:14,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 336 flow [2022-11-25 18:31:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1082 transitions. [2022-11-25 18:31:14,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3903318903318903 [2022-11-25 18:31:14,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1082 transitions. [2022-11-25 18:31:14,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1082 transitions. [2022-11-25 18:31:14,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:14,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1082 transitions. [2022-11-25 18:31:14,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.6666666666667) internal successors, (1082), 3 states have internal predecessors, (1082), 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) [2022-11-25 18:31:14,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:14,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:14,472 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 184 flow. Second operand 3 states and 1082 transitions. [2022-11-25 18:31:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 336 flow [2022-11-25 18:31:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:14,477 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 180 flow [2022-11-25 18:31:14,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2022-11-25 18:31:14,480 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -52 predicate places. [2022-11-25 18:31:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 180 flow [2022-11-25 18:31:14,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 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) [2022-11-25 18:31:14,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:14,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:31:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:31:14,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1576050, now seen corresponding path program 1 times [2022-11-25 18:31:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245250508] [2022-11-25 18:31:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:14,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:14,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:14,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245250508] [2022-11-25 18:31:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245250508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:14,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:14,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012705098] [2022-11-25 18:31:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:14,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:14,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:14,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 924 [2022-11-25 18:31:14,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 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) [2022-11-25 18:31:14,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:14,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 924 [2022-11-25 18:31:14,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:15,914 INFO L130 PetriNetUnfolder]: 6134/9708 cut-off events. [2022-11-25 18:31:15,914 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:15,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18943 conditions, 9708 events. 6134/9708 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 55155 event pairs, 5320 based on Foata normal form. 0/5180 useless extension candidates. Maximal degree in co-relation 18939. Up to 9191 conditions per place. [2022-11-25 18:31:15,968 INFO L137 encePairwiseOnDemand]: 918/924 looper letters, 72 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2022-11-25 18:31:15,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 316 flow [2022-11-25 18:31:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1089 transitions. [2022-11-25 18:31:15,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2022-11-25 18:31:15,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1089 transitions. [2022-11-25 18:31:15,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1089 transitions. [2022-11-25 18:31:15,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:15,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1089 transitions. [2022-11-25 18:31:15,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 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) [2022-11-25 18:31:15,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:15,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:15,985 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 180 flow. Second operand 3 states and 1089 transitions. [2022-11-25 18:31:15,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 316 flow [2022-11-25 18:31:15,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:15,988 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 168 flow [2022-11-25 18:31:15,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2022-11-25 18:31:15,989 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -57 predicate places. [2022-11-25 18:31:15,989 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 168 flow [2022-11-25 18:31:15,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 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) [2022-11-25 18:31:15,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:15,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:31:15,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:31:15,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1576051, now seen corresponding path program 1 times [2022-11-25 18:31:15,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:15,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454736468] [2022-11-25 18:31:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:15,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:16,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454736468] [2022-11-25 18:31:16,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454736468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:16,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:16,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10868377] [2022-11-25 18:31:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:16,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 924 [2022-11-25 18:31:16,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 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) [2022-11-25 18:31:16,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:16,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 924 [2022-11-25 18:31:16,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:17,341 INFO L130 PetriNetUnfolder]: 5411/8569 cut-off events. [2022-11-25 18:31:17,342 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:17,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16693 conditions, 8569 events. 5411/8569 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 47757 event pairs, 4649 based on Foata normal form. 0/4807 useless extension candidates. Maximal degree in co-relation 16689. Up to 8083 conditions per place. [2022-11-25 18:31:17,402 INFO L137 encePairwiseOnDemand]: 918/924 looper letters, 67 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2022-11-25 18:31:17,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 298 flow [2022-11-25 18:31:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2022-11-25 18:31:17,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38997113997113997 [2022-11-25 18:31:17,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2022-11-25 18:31:17,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2022-11-25 18:31:17,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:17,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2022-11-25 18:31:17,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 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) [2022-11-25 18:31:17,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:17,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:17,421 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 168 flow. Second operand 3 states and 1081 transitions. [2022-11-25 18:31:17,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 298 flow [2022-11-25 18:31:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:17,427 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 163 flow [2022-11-25 18:31:17,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2022-11-25 18:31:17,431 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -60 predicate places. [2022-11-25 18:31:17,431 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 163 flow [2022-11-25 18:31:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 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) [2022-11-25 18:31:17,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:17,432 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:31:17,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:31:17,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 48854476, now seen corresponding path program 1 times [2022-11-25 18:31:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:17,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37812727] [2022-11-25 18:31:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:17,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37812727] [2022-11-25 18:31:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37812727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:18,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:18,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:18,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569177940] [2022-11-25 18:31:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:18,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:18,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:18,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:18,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:19,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 924 [2022-11-25 18:31:19,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2022-11-25 18:31:19,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:19,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 924 [2022-11-25 18:31:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:20,452 INFO L130 PetriNetUnfolder]: 5706/8946 cut-off events. [2022-11-25 18:31:20,452 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:31:20,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17528 conditions, 8946 events. 5706/8946 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 49029 event pairs, 4730 based on Foata normal form. 0/4873 useless extension candidates. Maximal degree in co-relation 17524. Up to 8535 conditions per place. [2022-11-25 18:31:20,510 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2022-11-25 18:31:20,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 325 flow [2022-11-25 18:31:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-11-25 18:31:20,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37734487734487737 [2022-11-25 18:31:20,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-11-25 18:31:20,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-11-25 18:31:20,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:20,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-11-25 18:31:20,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 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) [2022-11-25 18:31:20,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:20,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:20,530 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 163 flow. Second operand 3 states and 1046 transitions. [2022-11-25 18:31:20,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 325 flow [2022-11-25 18:31:20,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:20,533 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 185 flow [2022-11-25 18:31:20,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2022-11-25 18:31:20,534 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -59 predicate places. [2022-11-25 18:31:20,535 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 185 flow [2022-11-25 18:31:20,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2022-11-25 18:31:20,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:20,536 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:31:20,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:31:20,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1514485899, now seen corresponding path program 1 times [2022-11-25 18:31:20,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:20,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139269996] [2022-11-25 18:31:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:20,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:20,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139269996] [2022-11-25 18:31:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139269996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:20,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:20,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:31:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939449605] [2022-11-25 18:31:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:20,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:31:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:31:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:31:21,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 924 [2022-11-25 18:31:21,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 320.25) internal successors, (1281), 4 states have internal predecessors, (1281), 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) [2022-11-25 18:31:21,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:21,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 924 [2022-11-25 18:31:21,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:22,302 INFO L130 PetriNetUnfolder]: 5915/9242 cut-off events. [2022-11-25 18:31:22,302 INFO L131 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2022-11-25 18:31:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18463 conditions, 9242 events. 5915/9242 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 51211 event pairs, 1451 based on Foata normal form. 41/5155 useless extension candidates. Maximal degree in co-relation 18458. Up to 8537 conditions per place. [2022-11-25 18:31:22,359 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 87 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2022-11-25 18:31:22,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 414 flow [2022-11-25 18:31:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1049 transitions. [2022-11-25 18:31:22,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37842712842712845 [2022-11-25 18:31:22,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1049 transitions. [2022-11-25 18:31:22,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1049 transitions. [2022-11-25 18:31:22,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:22,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1049 transitions. [2022-11-25 18:31:22,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.6666666666667) internal successors, (1049), 3 states have internal predecessors, (1049), 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) [2022-11-25 18:31:22,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:22,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:22,376 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 185 flow. Second operand 3 states and 1049 transitions. [2022-11-25 18:31:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 414 flow [2022-11-25 18:31:22,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:22,379 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 217 flow [2022-11-25 18:31:22,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2022-11-25 18:31:22,380 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -57 predicate places. [2022-11-25 18:31:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 217 flow [2022-11-25 18:31:22,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 320.25) internal successors, (1281), 4 states have internal predecessors, (1281), 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) [2022-11-25 18:31:22,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:22,381 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:31:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:31:22,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1514487523, now seen corresponding path program 1 times [2022-11-25 18:31:22,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:22,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687663795] [2022-11-25 18:31:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:22,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:22,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687663795] [2022-11-25 18:31:22,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687663795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:22,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:22,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:31:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852320742] [2022-11-25 18:31:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:22,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:31:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:31:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:31:22,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 924 [2022-11-25 18:31:22,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 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) [2022-11-25 18:31:22,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:22,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 924 [2022-11-25 18:31:22,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:23,671 INFO L130 PetriNetUnfolder]: 5092/8059 cut-off events. [2022-11-25 18:31:23,671 INFO L131 PetriNetUnfolder]: For 616/616 co-relation queries the response was YES. [2022-11-25 18:31:23,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16187 conditions, 8059 events. 5092/8059 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 44767 event pairs, 1335 based on Foata normal form. 200/5025 useless extension candidates. Maximal degree in co-relation 16181. Up to 6959 conditions per place. [2022-11-25 18:31:23,717 INFO L137 encePairwiseOnDemand]: 917/924 looper letters, 91 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2022-11-25 18:31:23,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 441 flow [2022-11-25 18:31:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:31:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:31:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1367 transitions. [2022-11-25 18:31:23,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36985930735930733 [2022-11-25 18:31:23,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1367 transitions. [2022-11-25 18:31:23,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1367 transitions. [2022-11-25 18:31:23,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:23,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1367 transitions. [2022-11-25 18:31:23,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.75) internal successors, (1367), 4 states have internal predecessors, (1367), 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) [2022-11-25 18:31:23,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 924.0) internal successors, (4620), 5 states have internal predecessors, (4620), 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) [2022-11-25 18:31:23,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 924.0) internal successors, (4620), 5 states have internal predecessors, (4620), 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) [2022-11-25 18:31:23,735 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 217 flow. Second operand 4 states and 1367 transitions. [2022-11-25 18:31:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 441 flow [2022-11-25 18:31:23,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:23,739 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 193 flow [2022-11-25 18:31:23,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2022-11-25 18:31:23,740 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -59 predicate places. [2022-11-25 18:31:23,740 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 193 flow [2022-11-25 18:31:23,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 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) [2022-11-25 18:31:23,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:23,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:31:23,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:31:23,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1514497226, now seen corresponding path program 1 times [2022-11-25 18:31:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:23,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121443445] [2022-11-25 18:31:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:23,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:23,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:23,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121443445] [2022-11-25 18:31:23,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121443445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:23,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527851929] [2022-11-25 18:31:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:24,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 924 [2022-11-25 18:31:24,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 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) [2022-11-25 18:31:24,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:24,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 924 [2022-11-25 18:31:24,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:24,508 INFO L130 PetriNetUnfolder]: 3667/5959 cut-off events. [2022-11-25 18:31:24,508 INFO L131 PetriNetUnfolder]: For 542/542 co-relation queries the response was YES. [2022-11-25 18:31:24,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11969 conditions, 5959 events. 3667/5959 cut-off events. For 542/542 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 32328 event pairs, 3041 based on Foata normal form. 0/3825 useless extension candidates. Maximal degree in co-relation 11963. Up to 5574 conditions per place. [2022-11-25 18:31:24,538 INFO L137 encePairwiseOnDemand]: 921/924 looper letters, 64 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-25 18:31:24,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 323 flow [2022-11-25 18:31:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1067 transitions. [2022-11-25 18:31:24,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2022-11-25 18:31:24,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1067 transitions. [2022-11-25 18:31:24,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1067 transitions. [2022-11-25 18:31:24,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:24,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1067 transitions. [2022-11-25 18:31:24,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.6666666666667) internal successors, (1067), 3 states have internal predecessors, (1067), 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) [2022-11-25 18:31:24,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:24,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:24,554 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 193 flow. Second operand 3 states and 1067 transitions. [2022-11-25 18:31:24,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 323 flow [2022-11-25 18:31:24,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:24,557 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 191 flow [2022-11-25 18:31:24,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2022-11-25 18:31:24,558 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -60 predicate places. [2022-11-25 18:31:24,558 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 191 flow [2022-11-25 18:31:24,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 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) [2022-11-25 18:31:24,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:24,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:31:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:31:24,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1514497228, now seen corresponding path program 1 times [2022-11-25 18:31:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430413288] [2022-11-25 18:31:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430413288] [2022-11-25 18:31:24,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430413288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:24,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:24,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:31:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508157883] [2022-11-25 18:31:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:31:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:31:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:31:24,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 924 [2022-11-25 18:31:24,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 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) [2022-11-25 18:31:24,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:24,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 924 [2022-11-25 18:31:24,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:25,244 INFO L130 PetriNetUnfolder]: 2268/3833 cut-off events. [2022-11-25 18:31:25,244 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-25 18:31:25,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7723 conditions, 3833 events. 2268/3833 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 20120 event pairs, 1837 based on Foata normal form. 0/2824 useless extension candidates. Maximal degree in co-relation 7717. Up to 3572 conditions per place. [2022-11-25 18:31:25,262 INFO L137 encePairwiseOnDemand]: 921/924 looper letters, 63 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-11-25 18:31:25,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 319 flow [2022-11-25 18:31:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1042 transitions. [2022-11-25 18:31:25,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3759018759018759 [2022-11-25 18:31:25,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1042 transitions. [2022-11-25 18:31:25,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1042 transitions. [2022-11-25 18:31:25,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:25,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1042 transitions. [2022-11-25 18:31:25,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 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) [2022-11-25 18:31:25,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:25,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:25,277 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 191 flow. Second operand 3 states and 1042 transitions. [2022-11-25 18:31:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 319 flow [2022-11-25 18:31:25,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:25,280 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 189 flow [2022-11-25 18:31:25,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2022-11-25 18:31:25,281 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -61 predicate places. [2022-11-25 18:31:25,281 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 189 flow [2022-11-25 18:31:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 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) [2022-11-25 18:31:25,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:25,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:31:25,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash -561973472, now seen corresponding path program 1 times [2022-11-25 18:31:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:25,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114023338] [2022-11-25 18:31:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:25,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114023338] [2022-11-25 18:31:25,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114023338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:25,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:25,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309080396] [2022-11-25 18:31:25,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:25,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:25,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:25,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 924 [2022-11-25 18:31:25,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 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) [2022-11-25 18:31:25,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:25,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 924 [2022-11-25 18:31:25,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:25,727 INFO L130 PetriNetUnfolder]: 1595/2746 cut-off events. [2022-11-25 18:31:25,727 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-11-25 18:31:25,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 2746 events. 1595/2746 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12058 event pairs, 812 based on Foata normal form. 60/2047 useless extension candidates. Maximal degree in co-relation 5500. Up to 1637 conditions per place. [2022-11-25 18:31:25,741 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 89 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2022-11-25 18:31:25,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 419 flow [2022-11-25 18:31:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1095 transitions. [2022-11-25 18:31:25,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.395021645021645 [2022-11-25 18:31:25,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1095 transitions. [2022-11-25 18:31:25,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1095 transitions. [2022-11-25 18:31:25,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:25,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1095 transitions. [2022-11-25 18:31:25,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 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) [2022-11-25 18:31:25,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:25,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:25,754 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 189 flow. Second operand 3 states and 1095 transitions. [2022-11-25 18:31:25,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 419 flow [2022-11-25 18:31:25,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 405 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 18:31:25,759 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 177 flow [2022-11-25 18:31:25,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2022-11-25 18:31:25,760 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -63 predicate places. [2022-11-25 18:31:25,760 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 177 flow [2022-11-25 18:31:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 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) [2022-11-25 18:31:25,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:25,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:25,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:31:25,761 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash -30507839, now seen corresponding path program 1 times [2022-11-25 18:31:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:25,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009263036] [2022-11-25 18:31:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:25,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009263036] [2022-11-25 18:31:25,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009263036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:25,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:25,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:31:25,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436741601] [2022-11-25 18:31:25,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:25,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:26,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 924 [2022-11-25 18:31:26,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 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) [2022-11-25 18:31:26,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:26,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 924 [2022-11-25 18:31:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:26,419 INFO L130 PetriNetUnfolder]: 1437/2482 cut-off events. [2022-11-25 18:31:26,420 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2022-11-25 18:31:26,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5017 conditions, 2482 events. 1437/2482 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10544 event pairs, 1112 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 5011. Up to 2300 conditions per place. [2022-11-25 18:31:26,433 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 58 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-11-25 18:31:26,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 291 flow [2022-11-25 18:31:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2022-11-25 18:31:26,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3795093795093795 [2022-11-25 18:31:26,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2022-11-25 18:31:26,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2022-11-25 18:31:26,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:26,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2022-11-25 18:31:26,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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) [2022-11-25 18:31:26,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:26,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:26,446 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 177 flow. Second operand 3 states and 1052 transitions. [2022-11-25 18:31:26,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 291 flow [2022-11-25 18:31:26,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:26,450 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 172 flow [2022-11-25 18:31:26,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-11-25 18:31:26,451 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -65 predicate places. [2022-11-25 18:31:26,452 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 172 flow [2022-11-25 18:31:26,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 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) [2022-11-25 18:31:26,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:26,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:26,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:31:26,453 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -30507838, now seen corresponding path program 1 times [2022-11-25 18:31:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:26,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472894041] [2022-11-25 18:31:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472894041] [2022-11-25 18:31:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472894041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:26,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:31:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067017934] [2022-11-25 18:31:26,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:31:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:31:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:31:27,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 924 [2022-11-25 18:31:27,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 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) [2022-11-25 18:31:27,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:27,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 924 [2022-11-25 18:31:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:27,631 INFO L130 PetriNetUnfolder]: 1532/2616 cut-off events. [2022-11-25 18:31:27,632 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-25 18:31:27,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 2616 events. 1532/2616 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10933 event pairs, 1185 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 5312. Up to 2452 conditions per place. [2022-11-25 18:31:27,641 INFO L137 encePairwiseOnDemand]: 917/924 looper letters, 64 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2022-11-25 18:31:27,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 345 flow [2022-11-25 18:31:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:31:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:31:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1964 transitions. [2022-11-25 18:31:27,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35425685425685427 [2022-11-25 18:31:27,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1964 transitions. [2022-11-25 18:31:27,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1964 transitions. [2022-11-25 18:31:27,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:27,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1964 transitions. [2022-11-25 18:31:27,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 327.3333333333333) internal successors, (1964), 6 states have internal predecessors, (1964), 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) [2022-11-25 18:31:27,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 924.0) internal successors, (6468), 7 states have internal predecessors, (6468), 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) [2022-11-25 18:31:27,663 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 924.0) internal successors, (6468), 7 states have internal predecessors, (6468), 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) [2022-11-25 18:31:27,664 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 172 flow. Second operand 6 states and 1964 transitions. [2022-11-25 18:31:27,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 345 flow [2022-11-25 18:31:27,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:27,666 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 224 flow [2022-11-25 18:31:27,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2022-11-25 18:31:27,667 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -59 predicate places. [2022-11-25 18:31:27,667 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 224 flow [2022-11-25 18:31:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 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) [2022-11-25 18:31:27,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:27,668 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:27,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:31:27,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash 368505921, now seen corresponding path program 1 times [2022-11-25 18:31:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897922238] [2022-11-25 18:31:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:27,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897922238] [2022-11-25 18:31:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897922238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:27,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:27,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:31:27,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616875369] [2022-11-25 18:31:27,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:31:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:31:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:31:28,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 924 [2022-11-25 18:31:28,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 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) [2022-11-25 18:31:28,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:28,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 924 [2022-11-25 18:31:28,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:28,566 INFO L130 PetriNetUnfolder]: 1418/2451 cut-off events. [2022-11-25 18:31:28,567 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2022-11-25 18:31:28,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5038 conditions, 2451 events. 1418/2451 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10386 event pairs, 1097 based on Foata normal form. 0/1827 useless extension candidates. Maximal degree in co-relation 5029. Up to 2268 conditions per place. [2022-11-25 18:31:28,580 INFO L137 encePairwiseOnDemand]: 921/924 looper letters, 63 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-11-25 18:31:28,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 352 flow [2022-11-25 18:31:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:31:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:31:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1395 transitions. [2022-11-25 18:31:28,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37743506493506496 [2022-11-25 18:31:28,586 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1395 transitions. [2022-11-25 18:31:28,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1395 transitions. [2022-11-25 18:31:28,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:28,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1395 transitions. [2022-11-25 18:31:28,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 348.75) internal successors, (1395), 4 states have internal predecessors, (1395), 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) [2022-11-25 18:31:28,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 924.0) internal successors, (4620), 5 states have internal predecessors, (4620), 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) [2022-11-25 18:31:28,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 924.0) internal successors, (4620), 5 states have internal predecessors, (4620), 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) [2022-11-25 18:31:28,598 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 224 flow. Second operand 4 states and 1395 transitions. [2022-11-25 18:31:28,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 352 flow [2022-11-25 18:31:28,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 344 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:31:28,600 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 218 flow [2022-11-25 18:31:28,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2022-11-25 18:31:28,602 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -58 predicate places. [2022-11-25 18:31:28,602 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 218 flow [2022-11-25 18:31:28,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 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) [2022-11-25 18:31:28,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:28,603 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:28,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:31:28,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1461217450, now seen corresponding path program 1 times [2022-11-25 18:31:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:28,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006999489] [2022-11-25 18:31:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:28,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:28,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:28,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006999489] [2022-11-25 18:31:28,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006999489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:28,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:28,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:31:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647310081] [2022-11-25 18:31:28,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:31:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:31:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:31:28,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 924 [2022-11-25 18:31:28,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 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) [2022-11-25 18:31:28,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:28,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 924 [2022-11-25 18:31:28,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:29,027 INFO L130 PetriNetUnfolder]: 1406/2439 cut-off events. [2022-11-25 18:31:29,027 INFO L131 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2022-11-25 18:31:29,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5012 conditions, 2439 events. 1406/2439 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10413 event pairs, 1083 based on Foata normal form. 0/1827 useless extension candidates. Maximal degree in co-relation 5002. Up to 2219 conditions per place. [2022-11-25 18:31:29,038 INFO L137 encePairwiseOnDemand]: 920/924 looper letters, 68 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2022-11-25 18:31:29,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 381 flow [2022-11-25 18:31:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:31:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:31:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1068 transitions. [2022-11-25 18:31:29,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2022-11-25 18:31:29,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1068 transitions. [2022-11-25 18:31:29,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1068 transitions. [2022-11-25 18:31:29,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:29,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1068 transitions. [2022-11-25 18:31:29,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 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) [2022-11-25 18:31:29,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:29,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:31:29,052 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 218 flow. Second operand 3 states and 1068 transitions. [2022-11-25 18:31:29,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 381 flow [2022-11-25 18:31:29,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:31:29,055 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 221 flow [2022-11-25 18:31:29,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2022-11-25 18:31:29,056 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -58 predicate places. [2022-11-25 18:31:29,056 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 221 flow [2022-11-25 18:31:29,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 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) [2022-11-25 18:31:29,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:29,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:29,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:31:29,058 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:31:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 226152372, now seen corresponding path program 1 times [2022-11-25 18:31:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:29,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258863340] [2022-11-25 18:31:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:39,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258863340] [2022-11-25 18:31:39,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258863340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:31:39,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:31:39,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:31:39,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858442046] [2022-11-25 18:31:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:31:39,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:31:39,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:31:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:32:09,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 924 [2022-11-25 18:32:09,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 221 flow. Second operand has 11 states, 11 states have (on average 296.1818181818182) internal successors, (3258), 11 states have internal predecessors, (3258), 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) [2022-11-25 18:32:09,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:09,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 924 [2022-11-25 18:32:09,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:18,667 INFO L130 PetriNetUnfolder]: 1791/3062 cut-off events. [2022-11-25 18:32:18,667 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-25 18:32:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 3062 events. 1791/3062 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13398 event pairs, 651 based on Foata normal form. 0/2338 useless extension candidates. Maximal degree in co-relation 6412. Up to 2349 conditions per place. [2022-11-25 18:32:18,677 INFO L137 encePairwiseOnDemand]: 911/924 looper letters, 127 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2022-11-25 18:32:18,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 153 transitions, 699 flow [2022-11-25 18:32:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:32:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:32:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3094 transitions. [2022-11-25 18:32:18,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33484848484848484 [2022-11-25 18:32:18,686 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3094 transitions. [2022-11-25 18:32:18,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3094 transitions. [2022-11-25 18:32:18,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:18,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3094 transitions. [2022-11-25 18:32:18,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 309.4) internal successors, (3094), 10 states have internal predecessors, (3094), 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) [2022-11-25 18:32:18,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 924.0) internal successors, (10164), 11 states have internal predecessors, (10164), 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) [2022-11-25 18:32:18,710 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 924.0) internal successors, (10164), 11 states have internal predecessors, (10164), 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) [2022-11-25 18:32:18,710 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 221 flow. Second operand 10 states and 3094 transitions. [2022-11-25 18:32:18,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 153 transitions, 699 flow [2022-11-25 18:32:18,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 153 transitions, 685 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:32:18,716 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 317 flow [2022-11-25 18:32:18,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=317, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2022-11-25 18:32:18,717 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -46 predicate places. [2022-11-25 18:32:18,717 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 317 flow [2022-11-25 18:32:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 296.1818181818182) internal successors, (3258), 11 states have internal predecessors, (3258), 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) [2022-11-25 18:32:18,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:18,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:18,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:32:18,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:32:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 126801386, now seen corresponding path program 2 times [2022-11-25 18:32:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662776532] [2022-11-25 18:32:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:19,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:19,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662776532] [2022-11-25 18:32:19,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662776532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:19,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:19,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:32:19,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966638380] [2022-11-25 18:32:19,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:32:19,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:32:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:32:20,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 924 [2022-11-25 18:32:20,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 83 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 306.85714285714283) internal successors, (2148), 7 states have internal predecessors, (2148), 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) [2022-11-25 18:32:20,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:20,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 924 [2022-11-25 18:32:20,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:20,866 INFO L130 PetriNetUnfolder]: 1572/2699 cut-off events. [2022-11-25 18:32:20,867 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2022-11-25 18:32:20,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2699 events. 1572/2699 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11444 event pairs, 419 based on Foata normal form. 22/2121 useless extension candidates. Maximal degree in co-relation 5891. Up to 2171 conditions per place. [2022-11-25 18:32:20,885 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 82 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-11-25 18:32:20,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 98 transitions, 513 flow [2022-11-25 18:32:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:32:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:32:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1607 transitions. [2022-11-25 18:32:20,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34783549783549783 [2022-11-25 18:32:20,890 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1607 transitions. [2022-11-25 18:32:20,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1607 transitions. [2022-11-25 18:32:20,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:20,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1607 transitions. [2022-11-25 18:32:20,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 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) [2022-11-25 18:32:20,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 924.0) internal successors, (5544), 6 states have internal predecessors, (5544), 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) [2022-11-25 18:32:20,901 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 924.0) internal successors, (5544), 6 states have internal predecessors, (5544), 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) [2022-11-25 18:32:20,902 INFO L175 Difference]: Start difference. First operand has 90 places, 83 transitions, 317 flow. Second operand 5 states and 1607 transitions. [2022-11-25 18:32:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 98 transitions, 513 flow [2022-11-25 18:32:20,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 485 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-25 18:32:20,906 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 276 flow [2022-11-25 18:32:20,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2022-11-25 18:32:20,907 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -50 predicate places. [2022-11-25 18:32:20,907 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 276 flow [2022-11-25 18:32:20,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 306.85714285714283) internal successors, (2148), 7 states have internal predecessors, (2148), 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) [2022-11-25 18:32:20,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:20,909 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:20,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:32:20,909 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:32:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash 285026702, now seen corresponding path program 1 times [2022-11-25 18:32:20,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:20,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749557465] [2022-11-25 18:32:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:20,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:21,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:21,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749557465] [2022-11-25 18:32:21,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749557465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:21,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:21,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:32:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099948078] [2022-11-25 18:32:21,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:32:21,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:32:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:32:23,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 924 [2022-11-25 18:32:23,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 276 flow. Second operand has 9 states, 9 states have (on average 301.44444444444446) internal successors, (2713), 9 states have internal predecessors, (2713), 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) [2022-11-25 18:32:23,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:23,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 924 [2022-11-25 18:32:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:23,791 INFO L130 PetriNetUnfolder]: 1571/2696 cut-off events. [2022-11-25 18:32:23,791 INFO L131 PetriNetUnfolder]: For 393/393 co-relation queries the response was YES. [2022-11-25 18:32:23,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5760 conditions, 2696 events. 1571/2696 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11370 event pairs, 1221 based on Foata normal form. 0/2043 useless extension candidates. Maximal degree in co-relation 5747. Up to 2522 conditions per place. [2022-11-25 18:32:23,805 INFO L137 encePairwiseOnDemand]: 914/924 looper letters, 72 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2022-11-25 18:32:23,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 505 flow [2022-11-25 18:32:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:32:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:32:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2483 transitions. [2022-11-25 18:32:23,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3359036796536797 [2022-11-25 18:32:23,813 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2483 transitions. [2022-11-25 18:32:23,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2483 transitions. [2022-11-25 18:32:23,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:23,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2483 transitions. [2022-11-25 18:32:23,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 310.375) internal successors, (2483), 8 states have internal predecessors, (2483), 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) [2022-11-25 18:32:23,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:32:23,831 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:32:23,831 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 276 flow. Second operand 8 states and 2483 transitions. [2022-11-25 18:32:23,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 505 flow [2022-11-25 18:32:23,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 487 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:32:23,836 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 341 flow [2022-11-25 18:32:23,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2022-11-25 18:32:23,837 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -44 predicate places. [2022-11-25 18:32:23,837 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 341 flow [2022-11-25 18:32:23,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 301.44444444444446) internal successors, (2713), 9 states have internal predecessors, (2713), 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) [2022-11-25 18:32:23,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:23,838 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 18:32:23,839 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:32:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1733310067, now seen corresponding path program 1 times [2022-11-25 18:32:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:23,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675113943] [2022-11-25 18:32:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:34,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:34,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675113943] [2022-11-25 18:32:34,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675113943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:34,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:32:34,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:32:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745803452] [2022-11-25 18:32:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:32:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:32:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:33:37,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 924 [2022-11-25 18:33:37,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 341 flow. Second operand has 12 states, 12 states have (on average 294.1666666666667) internal successors, (3530), 12 states have internal predecessors, (3530), 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) [2022-11-25 18:33:37,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:37,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 924 [2022-11-25 18:33:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:55,018 INFO L130 PetriNetUnfolder]: 1752/3010 cut-off events. [2022-11-25 18:33:55,018 INFO L131 PetriNetUnfolder]: For 363/363 co-relation queries the response was YES. [2022-11-25 18:33:55,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6537 conditions, 3010 events. 1752/3010 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13128 event pairs, 637 based on Foata normal form. 0/2280 useless extension candidates. Maximal degree in co-relation 6521. Up to 2287 conditions per place. [2022-11-25 18:33:55,030 INFO L137 encePairwiseOnDemand]: 912/924 looper letters, 131 selfloop transitions, 26 changer transitions 0/164 dead transitions. [2022-11-25 18:33:55,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 164 transitions, 835 flow [2022-11-25 18:33:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:33:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:33:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3373 transitions. [2022-11-25 18:33:55,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3318575364029909 [2022-11-25 18:33:55,039 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3373 transitions. [2022-11-25 18:33:55,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3373 transitions. [2022-11-25 18:33:55,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:55,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3373 transitions. [2022-11-25 18:33:55,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 306.6363636363636) internal successors, (3373), 11 states have internal predecessors, (3373), 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) [2022-11-25 18:33:55,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 924.0) internal successors, (11088), 12 states have internal predecessors, (11088), 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) [2022-11-25 18:33:55,060 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 924.0) internal successors, (11088), 12 states have internal predecessors, (11088), 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) [2022-11-25 18:33:55,061 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 341 flow. Second operand 11 states and 3373 transitions. [2022-11-25 18:33:55,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 164 transitions, 835 flow [2022-11-25 18:33:55,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 164 transitions, 805 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 18:33:55,067 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 407 flow [2022-11-25 18:33:55,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=407, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2022-11-25 18:33:55,068 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -35 predicate places. [2022-11-25 18:33:55,068 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 407 flow [2022-11-25 18:33:55,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 294.1666666666667) internal successors, (3530), 12 states have internal predecessors, (3530), 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) [2022-11-25 18:33:55,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:55,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 18:33:55,070 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:33:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash -518223337, now seen corresponding path program 2 times [2022-11-25 18:33:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:33:55,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434922866] [2022-11-25 18:33:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:33:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:33:56,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:33:56,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434922866] [2022-11-25 18:33:56,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434922866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:33:56,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:33:56,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:33:56,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603933399] [2022-11-25 18:33:56,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:33:56,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:33:56,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:33:56,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:33:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:33:58,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 924 [2022-11-25 18:33:58,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 407 flow. Second operand has 11 states, 11 states have (on average 294.27272727272725) internal successors, (3237), 11 states have internal predecessors, (3237), 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) [2022-11-25 18:33:58,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:33:58,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 924 [2022-11-25 18:33:58,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:59,532 INFO L130 PetriNetUnfolder]: 1933/3307 cut-off events. [2022-11-25 18:33:59,532 INFO L131 PetriNetUnfolder]: For 589/589 co-relation queries the response was YES. [2022-11-25 18:33:59,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 3307 events. 1933/3307 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14921 event pairs, 492 based on Foata normal form. 0/2500 useless extension candidates. Maximal degree in co-relation 7438. Up to 2158 conditions per place. [2022-11-25 18:33:59,547 INFO L137 encePairwiseOnDemand]: 914/924 looper letters, 115 selfloop transitions, 23 changer transitions 0/145 dead transitions. [2022-11-25 18:33:59,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 145 transitions, 818 flow [2022-11-25 18:33:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:33:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:33:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2465 transitions. [2022-11-25 18:33:59,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3334686147186147 [2022-11-25 18:33:59,551 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2465 transitions. [2022-11-25 18:33:59,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2465 transitions. [2022-11-25 18:33:59,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:59,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2465 transitions. [2022-11-25 18:33:59,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 308.125) internal successors, (2465), 8 states have internal predecessors, (2465), 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) [2022-11-25 18:33:59,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:33:59,566 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:33:59,566 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 407 flow. Second operand 8 states and 2465 transitions. [2022-11-25 18:33:59,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 145 transitions, 818 flow [2022-11-25 18:33:59,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 770 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-11-25 18:33:59,573 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 451 flow [2022-11-25 18:33:59,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=451, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2022-11-25 18:33:59,574 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -33 predicate places. [2022-11-25 18:33:59,574 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 451 flow [2022-11-25 18:33:59,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 294.27272727272725) internal successors, (3237), 11 states have internal predecessors, (3237), 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) [2022-11-25 18:33:59,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:59,575 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 18:33:59,576 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:33:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 245173493, now seen corresponding path program 3 times [2022-11-25 18:33:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:33:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249147137] [2022-11-25 18:33:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:33:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:00,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249147137] [2022-11-25 18:34:00,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249147137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:00,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:00,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:34:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566322644] [2022-11-25 18:34:00,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:34:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:34:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:34:02,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 924 [2022-11-25 18:34:02,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 451 flow. Second operand has 10 states, 10 states have (on average 298.4) internal successors, (2984), 10 states have internal predecessors, (2984), 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) [2022-11-25 18:34:02,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:02,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 924 [2022-11-25 18:34:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:03,075 INFO L130 PetriNetUnfolder]: 2015/3477 cut-off events. [2022-11-25 18:34:03,075 INFO L131 PetriNetUnfolder]: For 833/833 co-relation queries the response was YES. [2022-11-25 18:34:03,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7935 conditions, 3477 events. 2015/3477 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 16178 event pairs, 595 based on Foata normal form. 0/2619 useless extension candidates. Maximal degree in co-relation 7914. Up to 1953 conditions per place. [2022-11-25 18:34:03,099 INFO L137 encePairwiseOnDemand]: 913/924 looper letters, 112 selfloop transitions, 26 changer transitions 0/145 dead transitions. [2022-11-25 18:34:03,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 145 transitions, 852 flow [2022-11-25 18:34:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:34:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:34:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2791 transitions. [2022-11-25 18:34:03,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3356180856180856 [2022-11-25 18:34:03,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2791 transitions. [2022-11-25 18:34:03,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2791 transitions. [2022-11-25 18:34:03,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:03,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2791 transitions. [2022-11-25 18:34:03,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 310.1111111111111) internal successors, (2791), 9 states have internal predecessors, (2791), 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) [2022-11-25 18:34:03,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 924.0) internal successors, (9240), 10 states have internal predecessors, (9240), 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) [2022-11-25 18:34:03,121 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 924.0) internal successors, (9240), 10 states have internal predecessors, (9240), 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) [2022-11-25 18:34:03,121 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 451 flow. Second operand 9 states and 2791 transitions. [2022-11-25 18:34:03,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 145 transitions, 852 flow [2022-11-25 18:34:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 145 transitions, 814 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-25 18:34:03,130 INFO L231 Difference]: Finished difference. Result has 108 places, 94 transitions, 514 flow [2022-11-25 18:34:03,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=108, PETRI_TRANSITIONS=94} [2022-11-25 18:34:03,131 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -28 predicate places. [2022-11-25 18:34:03,131 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 94 transitions, 514 flow [2022-11-25 18:34:03,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 298.4) internal successors, (2984), 10 states have internal predecessors, (2984), 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) [2022-11-25 18:34:03,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:03,132 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:03,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 18:34:03,132 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 245778923, now seen corresponding path program 4 times [2022-11-25 18:34:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:03,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353295865] [2022-11-25 18:34:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:04,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353295865] [2022-11-25 18:34:04,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353295865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:04,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:04,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:34:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108058720] [2022-11-25 18:34:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:34:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:34:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:34:06,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 924 [2022-11-25 18:34:06,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 94 transitions, 514 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 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) [2022-11-25 18:34:06,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:06,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 924 [2022-11-25 18:34:06,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:07,347 INFO L130 PetriNetUnfolder]: 1999/3439 cut-off events. [2022-11-25 18:34:07,347 INFO L131 PetriNetUnfolder]: For 1192/1192 co-relation queries the response was YES. [2022-11-25 18:34:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8020 conditions, 3439 events. 1999/3439 cut-off events. For 1192/1192 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15857 event pairs, 580 based on Foata normal form. 0/2596 useless extension candidates. Maximal degree in co-relation 7997. Up to 1956 conditions per place. [2022-11-25 18:34:07,363 INFO L137 encePairwiseOnDemand]: 914/924 looper letters, 111 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2022-11-25 18:34:07,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 890 flow [2022-11-25 18:34:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:34:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:34:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2356 transitions. [2022-11-25 18:34:07,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31872294372294374 [2022-11-25 18:34:07,369 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2356 transitions. [2022-11-25 18:34:07,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2356 transitions. [2022-11-25 18:34:07,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:07,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2356 transitions. [2022-11-25 18:34:07,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 294.5) internal successors, (2356), 8 states have internal predecessors, (2356), 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) [2022-11-25 18:34:07,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:34:07,379 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:34:07,379 INFO L175 Difference]: Start difference. First operand has 108 places, 94 transitions, 514 flow. Second operand 8 states and 2356 transitions. [2022-11-25 18:34:07,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 890 flow [2022-11-25 18:34:07,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 143 transitions, 863 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 18:34:07,390 INFO L231 Difference]: Finished difference. Result has 108 places, 92 transitions, 531 flow [2022-11-25 18:34:07,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=531, PETRI_PLACES=108, PETRI_TRANSITIONS=92} [2022-11-25 18:34:07,391 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -28 predicate places. [2022-11-25 18:34:07,391 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 92 transitions, 531 flow [2022-11-25 18:34:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 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) [2022-11-25 18:34:07,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:07,392 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:07,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 18:34:07,393 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -968277709, now seen corresponding path program 1 times [2022-11-25 18:34:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:07,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815672388] [2022-11-25 18:34:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:07,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:08,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:08,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815672388] [2022-11-25 18:34:08,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815672388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:08,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:08,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:34:08,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475759953] [2022-11-25 18:34:08,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:34:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:08,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:34:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:34:12,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 924 [2022-11-25 18:34:12,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 92 transitions, 531 flow. Second operand has 10 states, 10 states have (on average 286.6) internal successors, (2866), 10 states have internal predecessors, (2866), 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) [2022-11-25 18:34:12,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:12,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 924 [2022-11-25 18:34:12,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:13,497 INFO L130 PetriNetUnfolder]: 2179/3753 cut-off events. [2022-11-25 18:34:13,497 INFO L131 PetriNetUnfolder]: For 1924/1924 co-relation queries the response was YES. [2022-11-25 18:34:13,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8970 conditions, 3753 events. 2179/3753 cut-off events. For 1924/1924 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17810 event pairs, 1545 based on Foata normal form. 0/2846 useless extension candidates. Maximal degree in co-relation 8947. Up to 3261 conditions per place. [2022-11-25 18:34:13,514 INFO L137 encePairwiseOnDemand]: 914/924 looper letters, 106 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2022-11-25 18:34:13,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 132 transitions, 928 flow [2022-11-25 18:34:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:34:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:34:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2958 transitions. [2022-11-25 18:34:13,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32012987012987015 [2022-11-25 18:34:13,520 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2958 transitions. [2022-11-25 18:34:13,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2958 transitions. [2022-11-25 18:34:13,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:13,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2958 transitions. [2022-11-25 18:34:13,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 295.8) internal successors, (2958), 10 states have internal predecessors, (2958), 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) [2022-11-25 18:34:13,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 924.0) internal successors, (10164), 11 states have internal predecessors, (10164), 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) [2022-11-25 18:34:13,536 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 924.0) internal successors, (10164), 11 states have internal predecessors, (10164), 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) [2022-11-25 18:34:13,536 INFO L175 Difference]: Start difference. First operand has 108 places, 92 transitions, 531 flow. Second operand 10 states and 2958 transitions. [2022-11-25 18:34:13,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 132 transitions, 928 flow [2022-11-25 18:34:13,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 132 transitions, 866 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-25 18:34:13,551 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 579 flow [2022-11-25 18:34:13,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=579, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2022-11-25 18:34:13,551 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -23 predicate places. [2022-11-25 18:34:13,552 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 579 flow [2022-11-25 18:34:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 286.6) internal successors, (2866), 10 states have internal predecessors, (2866), 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) [2022-11-25 18:34:13,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:13,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:13,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 18:34:13,553 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 735305074, now seen corresponding path program 1 times [2022-11-25 18:34:13,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:13,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16497520] [2022-11-25 18:34:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:14,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:14,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16497520] [2022-11-25 18:34:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16497520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:14,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:34:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560482018] [2022-11-25 18:34:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:14,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:34:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:34:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:34:16,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 924 [2022-11-25 18:34:16,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 579 flow. Second operand has 11 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 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) [2022-11-25 18:34:16,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:16,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 924 [2022-11-25 18:34:16,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:17,454 INFO L130 PetriNetUnfolder]: 2147/3699 cut-off events. [2022-11-25 18:34:17,454 INFO L131 PetriNetUnfolder]: For 1847/1847 co-relation queries the response was YES. [2022-11-25 18:34:17,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8824 conditions, 3699 events. 2147/3699 cut-off events. For 1847/1847 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17471 event pairs, 592 based on Foata normal form. 22/2903 useless extension candidates. Maximal degree in co-relation 8798. Up to 2292 conditions per place. [2022-11-25 18:34:17,471 INFO L137 encePairwiseOnDemand]: 915/924 looper letters, 119 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2022-11-25 18:34:17,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 149 transitions, 983 flow [2022-11-25 18:34:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:34:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:34:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2367 transitions. [2022-11-25 18:34:17,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.320211038961039 [2022-11-25 18:34:17,476 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2367 transitions. [2022-11-25 18:34:17,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2367 transitions. [2022-11-25 18:34:17,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:17,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2367 transitions. [2022-11-25 18:34:17,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 295.875) internal successors, (2367), 8 states have internal predecessors, (2367), 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) [2022-11-25 18:34:17,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:34:17,488 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 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) [2022-11-25 18:34:17,488 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 579 flow. Second operand 8 states and 2367 transitions. [2022-11-25 18:34:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 149 transitions, 983 flow [2022-11-25 18:34:17,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 149 transitions, 952 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 18:34:17,504 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 608 flow [2022-11-25 18:34:17,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=608, PETRI_PLACES=115, PETRI_TRANSITIONS=96} [2022-11-25 18:34:17,504 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -21 predicate places. [2022-11-25 18:34:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 608 flow [2022-11-25 18:34:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 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) [2022-11-25 18:34:17,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:17,505 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 18:34:17,506 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -612505894, now seen corresponding path program 2 times [2022-11-25 18:34:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:17,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359279459] [2022-11-25 18:34:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359279459] [2022-11-25 18:34:18,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359279459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:18,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:18,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:34:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855182378] [2022-11-25 18:34:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:18,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:34:18,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:34:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:34:21,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 924 [2022-11-25 18:34:21,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 96 transitions, 608 flow. Second operand has 11 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 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) [2022-11-25 18:34:21,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:21,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 924 [2022-11-25 18:34:21,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:22,208 INFO L130 PetriNetUnfolder]: 2131/3670 cut-off events. [2022-11-25 18:34:22,209 INFO L131 PetriNetUnfolder]: For 2596/2596 co-relation queries the response was YES. [2022-11-25 18:34:22,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8961 conditions, 3670 events. 2131/3670 cut-off events. For 2596/2596 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 17291 event pairs, 482 based on Foata normal form. 11/2866 useless extension candidates. Maximal degree in co-relation 8934. Up to 1964 conditions per place. [2022-11-25 18:34:22,226 INFO L137 encePairwiseOnDemand]: 915/924 looper letters, 116 selfloop transitions, 24 changer transitions 0/146 dead transitions. [2022-11-25 18:34:22,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 146 transitions, 996 flow [2022-11-25 18:34:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:34:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:34:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2644 transitions. [2022-11-25 18:34:22,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3179413179413179 [2022-11-25 18:34:22,230 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2644 transitions. [2022-11-25 18:34:22,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2644 transitions. [2022-11-25 18:34:22,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:22,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2644 transitions. [2022-11-25 18:34:22,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.77777777777777) internal successors, (2644), 9 states have internal predecessors, (2644), 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) [2022-11-25 18:34:22,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 924.0) internal successors, (9240), 10 states have internal predecessors, (9240), 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) [2022-11-25 18:34:22,242 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 924.0) internal successors, (9240), 10 states have internal predecessors, (9240), 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) [2022-11-25 18:34:22,242 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 608 flow. Second operand 9 states and 2644 transitions. [2022-11-25 18:34:22,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 146 transitions, 996 flow [2022-11-25 18:34:22,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 965 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 18:34:22,258 INFO L231 Difference]: Finished difference. Result has 119 places, 96 transitions, 638 flow [2022-11-25 18:34:22,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=638, PETRI_PLACES=119, PETRI_TRANSITIONS=96} [2022-11-25 18:34:22,259 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -17 predicate places. [2022-11-25 18:34:22,259 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 96 transitions, 638 flow [2022-11-25 18:34:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 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) [2022-11-25 18:34:22,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:22,260 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] [2022-11-25 18:34:22,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 18:34:22,261 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash -286015657, now seen corresponding path program 1 times [2022-11-25 18:34:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:22,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029989962] [2022-11-25 18:34:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:22,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:23,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029989962] [2022-11-25 18:34:23,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029989962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:23,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:23,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:34:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374042188] [2022-11-25 18:34:23,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:23,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:34:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:34:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:34:24,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 924 [2022-11-25 18:34:24,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 96 transitions, 638 flow. Second operand has 12 states, 12 states have (on average 294.8333333333333) internal successors, (3538), 12 states have internal predecessors, (3538), 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) [2022-11-25 18:34:24,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:24,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 924 [2022-11-25 18:34:24,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:26,203 INFO L130 PetriNetUnfolder]: 2250/3860 cut-off events. [2022-11-25 18:34:26,203 INFO L131 PetriNetUnfolder]: For 3580/3580 co-relation queries the response was YES. [2022-11-25 18:34:26,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9522 conditions, 3860 events. 2250/3860 cut-off events. For 3580/3580 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 18402 event pairs, 1521 based on Foata normal form. 0/3017 useless extension candidates. Maximal degree in co-relation 9494. Up to 3194 conditions per place. [2022-11-25 18:34:26,220 INFO L137 encePairwiseOnDemand]: 909/924 looper letters, 142 selfloop transitions, 32 changer transitions 0/180 dead transitions. [2022-11-25 18:34:26,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 180 transitions, 1232 flow [2022-11-25 18:34:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:34:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:34:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4550 transitions. [2022-11-25 18:34:26,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3282828282828283 [2022-11-25 18:34:26,227 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4550 transitions. [2022-11-25 18:34:26,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4550 transitions. [2022-11-25 18:34:26,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:26,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4550 transitions. [2022-11-25 18:34:26,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 303.3333333333333) internal successors, (4550), 15 states have internal predecessors, (4550), 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) [2022-11-25 18:34:26,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 924.0) internal successors, (14784), 16 states have internal predecessors, (14784), 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) [2022-11-25 18:34:26,244 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 924.0) internal successors, (14784), 16 states have internal predecessors, (14784), 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) [2022-11-25 18:34:26,244 INFO L175 Difference]: Start difference. First operand has 119 places, 96 transitions, 638 flow. Second operand 15 states and 4550 transitions. [2022-11-25 18:34:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 180 transitions, 1232 flow [2022-11-25 18:34:26,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 180 transitions, 1194 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:34:26,263 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 791 flow [2022-11-25 18:34:26,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=791, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2022-11-25 18:34:26,264 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -2 predicate places. [2022-11-25 18:34:26,264 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 791 flow [2022-11-25 18:34:26,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 294.8333333333333) internal successors, (3538), 12 states have internal predecessors, (3538), 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) [2022-11-25 18:34:26,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:26,265 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] [2022-11-25 18:34:26,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 18:34:26,265 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:26,266 INFO L85 PathProgramCache]: Analyzing trace with hash -708710314, now seen corresponding path program 1 times [2022-11-25 18:34:26,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:26,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117449502] [2022-11-25 18:34:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:26,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117449502] [2022-11-25 18:34:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117449502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:26,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:26,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:34:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922910440] [2022-11-25 18:34:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:26,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:34:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:34:26,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:34:26,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 924 [2022-11-25 18:34:26,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 791 flow. Second operand has 4 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 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) [2022-11-25 18:34:26,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:26,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 924 [2022-11-25 18:34:26,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:27,423 INFO L130 PetriNetUnfolder]: 2761/4849 cut-off events. [2022-11-25 18:34:27,423 INFO L131 PetriNetUnfolder]: For 4229/4236 co-relation queries the response was YES. [2022-11-25 18:34:27,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12413 conditions, 4849 events. 2761/4849 cut-off events. For 4229/4236 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 25736 event pairs, 1309 based on Foata normal form. 7/3917 useless extension candidates. Maximal degree in co-relation 12378. Up to 3590 conditions per place. [2022-11-25 18:34:27,455 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 138 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-25 18:34:27,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 156 transitions, 1262 flow [2022-11-25 18:34:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:34:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:34:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1410 transitions. [2022-11-25 18:34:27,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3814935064935065 [2022-11-25 18:34:27,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1410 transitions. [2022-11-25 18:34:27,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1410 transitions. [2022-11-25 18:34:27,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:27,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1410 transitions. [2022-11-25 18:34:27,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 352.5) internal successors, (1410), 4 states have internal predecessors, (1410), 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) [2022-11-25 18:34:27,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 924.0) internal successors, (4620), 5 states have internal predecessors, (4620), 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) [2022-11-25 18:34:27,462 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 924.0) internal successors, (4620), 5 states have internal predecessors, (4620), 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) [2022-11-25 18:34:27,462 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 791 flow. Second operand 4 states and 1410 transitions. [2022-11-25 18:34:27,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 156 transitions, 1262 flow [2022-11-25 18:34:27,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 156 transitions, 1211 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-25 18:34:27,479 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 768 flow [2022-11-25 18:34:27,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=768, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2022-11-25 18:34:27,480 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -4 predicate places. [2022-11-25 18:34:27,480 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 768 flow [2022-11-25 18:34:27,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 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) [2022-11-25 18:34:27,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:27,481 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] [2022-11-25 18:34:27,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 18:34:27,481 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -48901305, now seen corresponding path program 1 times [2022-11-25 18:34:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768684869] [2022-11-25 18:34:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:27,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768684869] [2022-11-25 18:34:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768684869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:27,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:27,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259048685] [2022-11-25 18:34:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:27,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 924 [2022-11-25 18:34:27,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 768 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 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) [2022-11-25 18:34:27,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:27,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 924 [2022-11-25 18:34:27,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:28,125 INFO L130 PetriNetUnfolder]: 1931/3422 cut-off events. [2022-11-25 18:34:28,125 INFO L131 PetriNetUnfolder]: For 3454/3461 co-relation queries the response was YES. [2022-11-25 18:34:28,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9092 conditions, 3422 events. 1931/3422 cut-off events. For 3454/3461 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 16755 event pairs, 927 based on Foata normal form. 148/2926 useless extension candidates. Maximal degree in co-relation 9055. Up to 1806 conditions per place. [2022-11-25 18:34:28,144 INFO L137 encePairwiseOnDemand]: 919/924 looper letters, 114 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2022-11-25 18:34:28,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 129 transitions, 1065 flow [2022-11-25 18:34:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:34:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1073 transitions. [2022-11-25 18:34:28,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3870851370851371 [2022-11-25 18:34:28,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1073 transitions. [2022-11-25 18:34:28,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1073 transitions. [2022-11-25 18:34:28,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:28,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1073 transitions. [2022-11-25 18:34:28,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 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) [2022-11-25 18:34:28,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:28,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:28,150 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 768 flow. Second operand 3 states and 1073 transitions. [2022-11-25 18:34:28,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 129 transitions, 1065 flow [2022-11-25 18:34:28,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 129 transitions, 1057 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:34:28,210 INFO L231 Difference]: Finished difference. Result has 133 places, 112 transitions, 779 flow [2022-11-25 18:34:28,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=779, PETRI_PLACES=133, PETRI_TRANSITIONS=112} [2022-11-25 18:34:28,210 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -3 predicate places. [2022-11-25 18:34:28,210 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 112 transitions, 779 flow [2022-11-25 18:34:28,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 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) [2022-11-25 18:34:28,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:28,211 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] [2022-11-25 18:34:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 18:34:28,211 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash 250567268, now seen corresponding path program 1 times [2022-11-25 18:34:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:28,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940096694] [2022-11-25 18:34:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:28,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:28,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940096694] [2022-11-25 18:34:28,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940096694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:28,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:28,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793049773] [2022-11-25 18:34:28,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:28,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 924 [2022-11-25 18:34:28,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 112 transitions, 779 flow. Second operand has 3 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 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) [2022-11-25 18:34:28,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:28,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 924 [2022-11-25 18:34:28,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:29,185 INFO L130 PetriNetUnfolder]: 2964/5185 cut-off events. [2022-11-25 18:34:29,185 INFO L131 PetriNetUnfolder]: For 5975/5994 co-relation queries the response was YES. [2022-11-25 18:34:29,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 5185 events. 2964/5185 cut-off events. For 5975/5994 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 28601 event pairs, 1439 based on Foata normal form. 15/4467 useless extension candidates. Maximal degree in co-relation 13841. Up to 3191 conditions per place. [2022-11-25 18:34:29,246 INFO L137 encePairwiseOnDemand]: 921/924 looper letters, 163 selfloop transitions, 2 changer transitions 0/179 dead transitions. [2022-11-25 18:34:29,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 1480 flow [2022-11-25 18:34:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:34:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1106 transitions. [2022-11-25 18:34:29,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2022-11-25 18:34:29,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1106 transitions. [2022-11-25 18:34:29,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1106 transitions. [2022-11-25 18:34:29,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:29,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1106 transitions. [2022-11-25 18:34:29,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 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) [2022-11-25 18:34:29,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:29,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:29,255 INFO L175 Difference]: Start difference. First operand has 133 places, 112 transitions, 779 flow. Second operand 3 states and 1106 transitions. [2022-11-25 18:34:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 1480 flow [2022-11-25 18:34:29,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 179 transitions, 1472 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:29,284 INFO L231 Difference]: Finished difference. Result has 134 places, 113 transitions, 785 flow [2022-11-25 18:34:29,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=785, PETRI_PLACES=134, PETRI_TRANSITIONS=113} [2022-11-25 18:34:29,285 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -2 predicate places. [2022-11-25 18:34:29,285 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 113 transitions, 785 flow [2022-11-25 18:34:29,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 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) [2022-11-25 18:34:29,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:29,286 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] [2022-11-25 18:34:29,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 18:34:29,286 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1679267937, now seen corresponding path program 1 times [2022-11-25 18:34:29,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:29,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132446433] [2022-11-25 18:34:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:29,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:29,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132446433] [2022-11-25 18:34:29,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132446433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:29,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:29,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593289379] [2022-11-25 18:34:29,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:29,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:29,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:29,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 924 [2022-11-25 18:34:29,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 113 transitions, 785 flow. Second operand has 3 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 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) [2022-11-25 18:34:29,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:29,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 924 [2022-11-25 18:34:29,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:29,981 INFO L130 PetriNetUnfolder]: 1703/3231 cut-off events. [2022-11-25 18:34:29,982 INFO L131 PetriNetUnfolder]: For 3329/3329 co-relation queries the response was YES. [2022-11-25 18:34:30,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 3231 events. 1703/3231 cut-off events. For 3329/3329 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 17100 event pairs, 391 based on Foata normal form. 516/3489 useless extension candidates. Maximal degree in co-relation 9051. Up to 2328 conditions per place. [2022-11-25 18:34:30,015 INFO L137 encePairwiseOnDemand]: 916/924 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2022-11-25 18:34:30,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 125 transitions, 1069 flow [2022-11-25 18:34:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:34:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2022-11-25 18:34:30,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2022-11-25 18:34:30,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2022-11-25 18:34:30,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2022-11-25 18:34:30,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:30,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2022-11-25 18:34:30,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 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) [2022-11-25 18:34:30,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:30,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:30,024 INFO L175 Difference]: Start difference. First operand has 134 places, 113 transitions, 785 flow. Second operand 3 states and 1062 transitions. [2022-11-25 18:34:30,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 125 transitions, 1069 flow [2022-11-25 18:34:30,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 125 transitions, 1066 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:34:30,041 INFO L231 Difference]: Finished difference. Result has 135 places, 113 transitions, 803 flow [2022-11-25 18:34:30,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=803, PETRI_PLACES=135, PETRI_TRANSITIONS=113} [2022-11-25 18:34:30,042 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -1 predicate places. [2022-11-25 18:34:30,042 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 113 transitions, 803 flow [2022-11-25 18:34:30,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 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) [2022-11-25 18:34:30,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:30,043 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] [2022-11-25 18:34:30,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 18:34:30,043 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1198736695, now seen corresponding path program 2 times [2022-11-25 18:34:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:30,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875418280] [2022-11-25 18:34:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:34:30,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875418280] [2022-11-25 18:34:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875418280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809859989] [2022-11-25 18:34:30,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:34:30,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:30,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:30,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:34:30,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:34:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:34:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:34:30,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:30,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809859989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:30,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:34:30,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-25 18:34:30,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831067301] [2022-11-25 18:34:30,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:30,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:30,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:31,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 924 [2022-11-25 18:34:31,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 113 transitions, 803 flow. Second operand has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 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) [2022-11-25 18:34:31,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:31,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 924 [2022-11-25 18:34:31,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:31,739 INFO L130 PetriNetUnfolder]: 1605/3121 cut-off events. [2022-11-25 18:34:31,739 INFO L131 PetriNetUnfolder]: For 3271/3274 co-relation queries the response was YES. [2022-11-25 18:34:31,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9340 conditions, 3121 events. 1605/3121 cut-off events. For 3271/3274 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16595 event pairs, 1264 based on Foata normal form. 10/2871 useless extension candidates. Maximal degree in co-relation 9301. Up to 2908 conditions per place. [2022-11-25 18:34:31,767 INFO L137 encePairwiseOnDemand]: 922/924 looper letters, 94 selfloop transitions, 1 changer transitions 2/111 dead transitions. [2022-11-25 18:34:31,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 111 transitions, 983 flow [2022-11-25 18:34:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:34:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1038 transitions. [2022-11-25 18:34:31,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2022-11-25 18:34:31,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1038 transitions. [2022-11-25 18:34:31,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1038 transitions. [2022-11-25 18:34:31,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:31,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1038 transitions. [2022-11-25 18:34:31,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 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) [2022-11-25 18:34:31,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:31,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 924.0) internal successors, (3696), 4 states have internal predecessors, (3696), 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) [2022-11-25 18:34:31,775 INFO L175 Difference]: Start difference. First operand has 135 places, 113 transitions, 803 flow. Second operand 3 states and 1038 transitions. [2022-11-25 18:34:31,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 111 transitions, 983 flow [2022-11-25 18:34:31,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 111 transitions, 958 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:34:31,790 INFO L231 Difference]: Finished difference. Result has 131 places, 109 transitions, 758 flow [2022-11-25 18:34:31,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=758, PETRI_PLACES=131, PETRI_TRANSITIONS=109} [2022-11-25 18:34:31,790 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, -5 predicate places. [2022-11-25 18:34:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 109 transitions, 758 flow [2022-11-25 18:34:31,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 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) [2022-11-25 18:34:31,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:31,791 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] [2022-11-25 18:34:31,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:32,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f1a57b-498d-4ff6-b9cc-72410d05171d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 18:34:32,009 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1688681495, now seen corresponding path program 1 times [2022-11-25 18:34:32,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:32,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260183745] [2022-11-25 18:34:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:33,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:33,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260183745] [2022-11-25 18:34:33,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260183745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:33,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:33,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:34:33,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388216439] [2022-11-25 18:34:33,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:33,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:34:33,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:34:33,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:34:37,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 924 [2022-11-25 18:34:37,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 109 transitions, 758 flow. Second operand has 14 states, 14 states have (on average 288.92857142857144) internal successors, (4045), 14 states have internal predecessors, (4045), 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) [2022-11-25 18:34:37,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:37,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 924 [2022-11-25 18:34:37,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:38,415 INFO L130 PetriNetUnfolder]: 1140/2204 cut-off events. [2022-11-25 18:34:38,415 INFO L131 PetriNetUnfolder]: For 2291/2291 co-relation queries the response was YES. [2022-11-25 18:34:38,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6498 conditions, 2204 events. 1140/2204 cut-off events. For 2291/2291 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10293 event pairs, 602 based on Foata normal form. 9/2041 useless extension candidates. Maximal degree in co-relation 6459. Up to 1322 conditions per place. [2022-11-25 18:34:38,428 INFO L137 encePairwiseOnDemand]: 909/924 looper letters, 114 selfloop transitions, 41 changer transitions 13/173 dead transitions. [2022-11-25 18:34:38,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 1314 flow [2022-11-25 18:34:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:34:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:34:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4150 transitions. [2022-11-25 18:34:38,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3208101422387137 [2022-11-25 18:34:38,434 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4150 transitions. [2022-11-25 18:34:38,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4150 transitions. [2022-11-25 18:34:38,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:38,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4150 transitions. [2022-11-25 18:34:38,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 296.42857142857144) internal successors, (4150), 14 states have internal predecessors, (4150), 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) [2022-11-25 18:34:38,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 924.0) internal successors, (13860), 15 states have internal predecessors, (13860), 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) [2022-11-25 18:34:38,455 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 924.0) internal successors, (13860), 15 states have internal predecessors, (13860), 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) [2022-11-25 18:34:38,455 INFO L175 Difference]: Start difference. First operand has 131 places, 109 transitions, 758 flow. Second operand 14 states and 4150 transitions. [2022-11-25 18:34:38,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 1314 flow [2022-11-25 18:34:38,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 173 transitions, 1311 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:34:38,471 INFO L231 Difference]: Finished difference. Result has 147 places, 115 transitions, 912 flow [2022-11-25 18:34:38,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=912, PETRI_PLACES=147, PETRI_TRANSITIONS=115} [2022-11-25 18:34:38,472 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, 11 predicate places. [2022-11-25 18:34:38,472 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 115 transitions, 912 flow [2022-11-25 18:34:38,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 288.92857142857144) internal successors, (4045), 14 states have internal predecessors, (4045), 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) [2022-11-25 18:34:38,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:38,474 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] [2022-11-25 18:34:38,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 18:34:38,474 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1918897617, now seen corresponding path program 2 times [2022-11-25 18:34:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:38,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421850655] [2022-11-25 18:34:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:39,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:39,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421850655] [2022-11-25 18:34:39,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421850655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:39,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:39,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:34:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542541832] [2022-11-25 18:34:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:39,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:34:39,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:34:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:34:43,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 924 [2022-11-25 18:34:43,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 115 transitions, 912 flow. Second operand has 14 states, 14 states have (on average 291.92857142857144) internal successors, (4087), 14 states have internal predecessors, (4087), 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) [2022-11-25 18:34:43,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:43,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 924 [2022-11-25 18:34:43,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:44,418 INFO L130 PetriNetUnfolder]: 1465/2822 cut-off events. [2022-11-25 18:34:44,418 INFO L131 PetriNetUnfolder]: For 3382/3382 co-relation queries the response was YES. [2022-11-25 18:34:44,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8540 conditions, 2822 events. 1465/2822 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 14361 event pairs, 513 based on Foata normal form. 9/2577 useless extension candidates. Maximal degree in co-relation 8496. Up to 1193 conditions per place. [2022-11-25 18:34:44,436 INFO L137 encePairwiseOnDemand]: 906/924 looper letters, 132 selfloop transitions, 48 changer transitions 12/197 dead transitions. [2022-11-25 18:34:44,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 197 transitions, 1599 flow [2022-11-25 18:34:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:34:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:34:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4208 transitions. [2022-11-25 18:34:44,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32529375386518244 [2022-11-25 18:34:44,442 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4208 transitions. [2022-11-25 18:34:44,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4208 transitions. [2022-11-25 18:34:44,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:44,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4208 transitions. [2022-11-25 18:34:44,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 300.57142857142856) internal successors, (4208), 14 states have internal predecessors, (4208), 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) [2022-11-25 18:34:44,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 924.0) internal successors, (13860), 15 states have internal predecessors, (13860), 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) [2022-11-25 18:34:44,460 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 924.0) internal successors, (13860), 15 states have internal predecessors, (13860), 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) [2022-11-25 18:34:44,460 INFO L175 Difference]: Start difference. First operand has 147 places, 115 transitions, 912 flow. Second operand 14 states and 4208 transitions. [2022-11-25 18:34:44,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 197 transitions, 1599 flow [2022-11-25 18:34:44,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 197 transitions, 1518 flow, removed 15 selfloop flow, removed 8 redundant places. [2022-11-25 18:34:44,484 INFO L231 Difference]: Finished difference. Result has 156 places, 124 transitions, 1045 flow [2022-11-25 18:34:44,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1045, PETRI_PLACES=156, PETRI_TRANSITIONS=124} [2022-11-25 18:34:44,485 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, 20 predicate places. [2022-11-25 18:34:44,485 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 124 transitions, 1045 flow [2022-11-25 18:34:44,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 291.92857142857144) internal successors, (4087), 14 states have internal predecessors, (4087), 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) [2022-11-25 18:34:44,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:44,486 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] [2022-11-25 18:34:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 18:34:44,487 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 245228975, now seen corresponding path program 3 times [2022-11-25 18:34:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:44,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131470029] [2022-11-25 18:34:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131470029] [2022-11-25 18:34:45,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131470029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:45,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:45,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 18:34:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184091873] [2022-11-25 18:34:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:45,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:34:45,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:34:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:34:49,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 924 [2022-11-25 18:34:49,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 124 transitions, 1045 flow. Second operand has 15 states, 15 states have (on average 276.8) internal successors, (4152), 15 states have internal predecessors, (4152), 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) [2022-11-25 18:34:49,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:49,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 924 [2022-11-25 18:34:49,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:50,218 INFO L130 PetriNetUnfolder]: 1502/2892 cut-off events. [2022-11-25 18:34:50,219 INFO L131 PetriNetUnfolder]: For 4095/4095 co-relation queries the response was YES. [2022-11-25 18:34:50,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9154 conditions, 2892 events. 1502/2892 cut-off events. For 4095/4095 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14723 event pairs, 438 based on Foata normal form. 5/2679 useless extension candidates. Maximal degree in co-relation 9107. Up to 1650 conditions per place. [2022-11-25 18:34:50,239 INFO L137 encePairwiseOnDemand]: 907/924 looper letters, 120 selfloop transitions, 54 changer transitions 13/192 dead transitions. [2022-11-25 18:34:50,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 192 transitions, 1660 flow [2022-11-25 18:34:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:34:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:34:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4261 transitions. [2022-11-25 18:34:50,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30743145743145744 [2022-11-25 18:34:50,245 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4261 transitions. [2022-11-25 18:34:50,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4261 transitions. [2022-11-25 18:34:50,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:50,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4261 transitions. [2022-11-25 18:34:50,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 284.06666666666666) internal successors, (4261), 15 states have internal predecessors, (4261), 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) [2022-11-25 18:34:50,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 924.0) internal successors, (14784), 16 states have internal predecessors, (14784), 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) [2022-11-25 18:34:50,265 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 924.0) internal successors, (14784), 16 states have internal predecessors, (14784), 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) [2022-11-25 18:34:50,265 INFO L175 Difference]: Start difference. First operand has 156 places, 124 transitions, 1045 flow. Second operand 15 states and 4261 transitions. [2022-11-25 18:34:50,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 192 transitions, 1660 flow [2022-11-25 18:34:50,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 192 transitions, 1604 flow, removed 6 selfloop flow, removed 8 redundant places. [2022-11-25 18:34:50,291 INFO L231 Difference]: Finished difference. Result has 165 places, 129 transitions, 1173 flow [2022-11-25 18:34:50,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1173, PETRI_PLACES=165, PETRI_TRANSITIONS=129} [2022-11-25 18:34:50,292 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, 29 predicate places. [2022-11-25 18:34:50,293 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 129 transitions, 1173 flow [2022-11-25 18:34:50,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 276.8) internal successors, (4152), 15 states have internal predecessors, (4152), 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) [2022-11-25 18:34:50,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:50,294 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] [2022-11-25 18:34:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 18:34:50,294 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash -140148313, now seen corresponding path program 4 times [2022-11-25 18:34:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:50,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813154263] [2022-11-25 18:34:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:50,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:51,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:51,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813154263] [2022-11-25 18:34:51,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813154263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:51,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:51,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 18:34:51,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774345157] [2022-11-25 18:34:51,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:51,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:34:51,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:34:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:34:55,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 924 [2022-11-25 18:34:55,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 129 transitions, 1173 flow. Second operand has 15 states, 15 states have (on average 278.8) internal successors, (4182), 15 states have internal predecessors, (4182), 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) [2022-11-25 18:34:55,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:55,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 924 [2022-11-25 18:34:55,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:56,640 INFO L130 PetriNetUnfolder]: 1201/2348 cut-off events. [2022-11-25 18:34:56,640 INFO L131 PetriNetUnfolder]: For 4796/4796 co-relation queries the response was YES. [2022-11-25 18:34:56,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 2348 events. 1201/2348 cut-off events. For 4796/4796 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 11235 event pairs, 308 based on Foata normal form. 10/2204 useless extension candidates. Maximal degree in co-relation 8134. Up to 1114 conditions per place. [2022-11-25 18:34:56,657 INFO L137 encePairwiseOnDemand]: 910/924 looper letters, 119 selfloop transitions, 48 changer transitions 13/185 dead transitions. [2022-11-25 18:34:56,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 185 transitions, 1734 flow [2022-11-25 18:34:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:34:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:34:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3725 transitions. [2022-11-25 18:34:56,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3101065601065601 [2022-11-25 18:34:56,662 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3725 transitions. [2022-11-25 18:34:56,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3725 transitions. [2022-11-25 18:34:56,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:56,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3725 transitions. [2022-11-25 18:34:56,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 286.53846153846155) internal successors, (3725), 13 states have internal predecessors, (3725), 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) [2022-11-25 18:34:56,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 924.0) internal successors, (12936), 14 states have internal predecessors, (12936), 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) [2022-11-25 18:34:56,679 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 924.0) internal successors, (12936), 14 states have internal predecessors, (12936), 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) [2022-11-25 18:34:56,679 INFO L175 Difference]: Start difference. First operand has 165 places, 129 transitions, 1173 flow. Second operand 13 states and 3725 transitions. [2022-11-25 18:34:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 185 transitions, 1734 flow [2022-11-25 18:34:56,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 185 transitions, 1649 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-11-25 18:34:56,703 INFO L231 Difference]: Finished difference. Result has 169 places, 131 transitions, 1243 flow [2022-11-25 18:34:56,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1243, PETRI_PLACES=169, PETRI_TRANSITIONS=131} [2022-11-25 18:34:56,703 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, 33 predicate places. [2022-11-25 18:34:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 131 transitions, 1243 flow [2022-11-25 18:34:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 278.8) internal successors, (4182), 15 states have internal predecessors, (4182), 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) [2022-11-25 18:34:56,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:56,704 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] [2022-11-25 18:34:56,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 18:34:56,705 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:34:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash 84868112, now seen corresponding path program 1 times [2022-11-25 18:34:56,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:56,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627595116] [2022-11-25 18:34:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:58,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:58,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627595116] [2022-11-25 18:34:58,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627595116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:58,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:58,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:34:58,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727490458] [2022-11-25 18:34:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:58,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:34:58,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:34:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:35:00,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 924 [2022-11-25 18:35:00,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 131 transitions, 1243 flow. Second operand has 14 states, 14 states have (on average 285.0) internal successors, (3990), 14 states have internal predecessors, (3990), 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) [2022-11-25 18:35:00,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:00,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 924 [2022-11-25 18:35:00,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:02,075 INFO L130 PetriNetUnfolder]: 1447/2828 cut-off events. [2022-11-25 18:35:02,076 INFO L131 PetriNetUnfolder]: For 5469/5469 co-relation queries the response was YES. [2022-11-25 18:35:02,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9610 conditions, 2828 events. 1447/2828 cut-off events. For 5469/5469 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14413 event pairs, 482 based on Foata normal form. 0/2594 useless extension candidates. Maximal degree in co-relation 9556. Up to 1471 conditions per place. [2022-11-25 18:35:02,093 INFO L137 encePairwiseOnDemand]: 912/924 looper letters, 142 selfloop transitions, 36 changer transitions 12/195 dead transitions. [2022-11-25 18:35:02,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 195 transitions, 1841 flow [2022-11-25 18:35:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:35:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:35:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3245 transitions. [2022-11-25 18:35:02,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31926406926406925 [2022-11-25 18:35:02,099 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3245 transitions. [2022-11-25 18:35:02,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3245 transitions. [2022-11-25 18:35:02,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:02,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3245 transitions. [2022-11-25 18:35:02,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 295.0) internal successors, (3245), 11 states have internal predecessors, (3245), 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) [2022-11-25 18:35:02,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 924.0) internal successors, (11088), 12 states have internal predecessors, (11088), 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) [2022-11-25 18:35:02,111 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 924.0) internal successors, (11088), 12 states have internal predecessors, (11088), 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) [2022-11-25 18:35:02,111 INFO L175 Difference]: Start difference. First operand has 169 places, 131 transitions, 1243 flow. Second operand 11 states and 3245 transitions. [2022-11-25 18:35:02,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 195 transitions, 1841 flow [2022-11-25 18:35:02,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 195 transitions, 1767 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-11-25 18:35:02,147 INFO L231 Difference]: Finished difference. Result has 170 places, 132 transitions, 1253 flow [2022-11-25 18:35:02,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1253, PETRI_PLACES=170, PETRI_TRANSITIONS=132} [2022-11-25 18:35:02,148 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, 34 predicate places. [2022-11-25 18:35:02,148 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 132 transitions, 1253 flow [2022-11-25 18:35:02,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 285.0) internal successors, (3990), 14 states have internal predecessors, (3990), 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) [2022-11-25 18:35:02,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:02,149 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] [2022-11-25 18:35:02,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-25 18:35:02,150 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:35:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2066263760, now seen corresponding path program 2 times [2022-11-25 18:35:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:02,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339195302] [2022-11-25 18:35:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:02,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:35:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:35:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:35:03,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339195302] [2022-11-25 18:35:03,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339195302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:35:03,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:35:03,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:35:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773538970] [2022-11-25 18:35:03,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:35:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:35:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:35:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:35:06,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 924 [2022-11-25 18:35:06,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 132 transitions, 1253 flow. Second operand has 14 states, 14 states have (on average 285.0) internal successors, (3990), 14 states have internal predecessors, (3990), 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) [2022-11-25 18:35:06,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:35:06,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 924 [2022-11-25 18:35:06,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:35:07,976 INFO L130 PetriNetUnfolder]: 1683/3262 cut-off events. [2022-11-25 18:35:07,976 INFO L131 PetriNetUnfolder]: For 5775/5779 co-relation queries the response was YES. [2022-11-25 18:35:07,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10726 conditions, 3262 events. 1683/3262 cut-off events. For 5775/5779 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 17547 event pairs, 380 based on Foata normal form. 21/3058 useless extension candidates. Maximal degree in co-relation 10671. Up to 1101 conditions per place. [2022-11-25 18:35:08,000 INFO L137 encePairwiseOnDemand]: 912/924 looper letters, 140 selfloop transitions, 35 changer transitions 11/191 dead transitions. [2022-11-25 18:35:08,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 191 transitions, 1827 flow [2022-11-25 18:35:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:35:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:35:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2953 transitions. [2022-11-25 18:35:08,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3195887445887446 [2022-11-25 18:35:08,005 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2953 transitions. [2022-11-25 18:35:08,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2953 transitions. [2022-11-25 18:35:08,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:35:08,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2953 transitions. [2022-11-25 18:35:08,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 295.3) internal successors, (2953), 10 states have internal predecessors, (2953), 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) [2022-11-25 18:35:08,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 924.0) internal successors, (10164), 11 states have internal predecessors, (10164), 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) [2022-11-25 18:35:08,018 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 924.0) internal successors, (10164), 11 states have internal predecessors, (10164), 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) [2022-11-25 18:35:08,018 INFO L175 Difference]: Start difference. First operand has 170 places, 132 transitions, 1253 flow. Second operand 10 states and 2953 transitions. [2022-11-25 18:35:08,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 191 transitions, 1827 flow [2022-11-25 18:35:08,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 191 transitions, 1719 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-11-25 18:35:08,054 INFO L231 Difference]: Finished difference. Result has 169 places, 133 transitions, 1232 flow [2022-11-25 18:35:08,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=924, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1232, PETRI_PLACES=169, PETRI_TRANSITIONS=133} [2022-11-25 18:35:08,055 INFO L288 CegarLoopForPetriNet]: 136 programPoint places, 33 predicate places. [2022-11-25 18:35:08,055 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 133 transitions, 1232 flow [2022-11-25 18:35:08,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 285.0) internal successors, (3990), 14 states have internal predecessors, (3990), 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) [2022-11-25 18:35:08,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:35:08,056 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] [2022-11-25 18:35:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-25 18:35:08,057 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 18:35:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1111485364, now seen corresponding path program 3 times [2022-11-25 18:35:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:08,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791637693] [2022-11-25 18:35:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat