./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eeefeeefd816c395f288507dfeefb0bc1cd20d5b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:07:17,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:07:17,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:07:17,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:07:17,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:07:17,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:07:17,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:07:17,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:07:17,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:07:17,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:07:17,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:07:17,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:07:17,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:07:17,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:07:17,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:07:17,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:07:17,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:07:17,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:07:17,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:07:17,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:07:17,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:07:17,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:07:17,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:07:17,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:07:17,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:07:17,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:07:17,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:07:17,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:07:17,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:07:17,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:07:17,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:07:17,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:07:17,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:07:17,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:07:17,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:07:17,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:07:17,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:07:17,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:07:17,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:07:17,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:07:17,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:07:17,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:07:17,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:07:17,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:07:17,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:07:17,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:07:17,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:07:17,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:07:17,445 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:07:17,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:07:17,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:07:17,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:07:17,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:07:17,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:07:17,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:07:17,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:07:17,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:07:17,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:07:17,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:07:17,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:07:17,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:07:17,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:07:17,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:07:17,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:07:17,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:07:17,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:07:17,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:07:17,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:07:17,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:07:17,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:07:17,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:07:17,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:07:17,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:07:17,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:07:17,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eeefeeefd816c395f288507dfeefb0bc1cd20d5b [2021-10-15 19:07:17,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:07:17,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:07:17,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:07:17,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:07:17,753 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:07:17,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem16_label42.c [2021-10-15 19:07:17,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/data/9cc7435f7/a9006b459f19497a959429e61efb661d/FLAG2c2ec53f6 [2021-10-15 19:07:18,549 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:07:18,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/sv-benchmarks/c/eca-rers2012/Problem16_label42.c [2021-10-15 19:07:18,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/data/9cc7435f7/a9006b459f19497a959429e61efb661d/FLAG2c2ec53f6 [2021-10-15 19:07:18,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/data/9cc7435f7/a9006b459f19497a959429e61efb661d [2021-10-15 19:07:18,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:07:18,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:07:18,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:07:18,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:07:18,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:07:18,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:07:18" (1/1) ... [2021-10-15 19:07:18,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3e72b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:18, skipping insertion in model container [2021-10-15 19:07:18,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:07:18" (1/1) ... [2021-10-15 19:07:18,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:07:18,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:07:19,007 WARN L228 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_eb214228-319e-42e4-a6e1-66d4c59b197a/sv-benchmarks/c/eca-rers2012/Problem16_label42.c[6474,6487] [2021-10-15 19:07:19,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:07:19,504 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:07:19,558 WARN L228 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_eb214228-319e-42e4-a6e1-66d4c59b197a/sv-benchmarks/c/eca-rers2012/Problem16_label42.c[6474,6487] [2021-10-15 19:07:19,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:07:19,845 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:07:19,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19 WrapperNode [2021-10-15 19:07:19,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:07:19,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:07:19,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:07:19,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:07:19,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:19,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:07:20,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:07:20,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:07:20,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:07:20,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:07:20,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:07:20,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:07:20,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:07:20,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (1/1) ... [2021-10-15 19:07:20,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:07:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:20,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:07:20,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:07:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:07:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:07:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:07:20,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:07:22,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:07:22,895 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 19:07:22,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:07:22 BoogieIcfgContainer [2021-10-15 19:07:22,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:07:22,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:07:22,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:07:22,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:07:22,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:07:18" (1/3) ... [2021-10-15 19:07:22,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189f01b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:07:22, skipping insertion in model container [2021-10-15 19:07:22,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:19" (2/3) ... [2021-10-15 19:07:22,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189f01b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:07:22, skipping insertion in model container [2021-10-15 19:07:22,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:07:22" (3/3) ... [2021-10-15 19:07:22,910 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label42.c [2021-10-15 19:07:22,916 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:07:22,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:07:22,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:07:22,986 INFO L339 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=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:07:22,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:07:23,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 723 transitions, 1446 flow [2021-10-15 19:07:23,221 INFO L129 PetriNetUnfolder]: 328/723 cut-off events. [2021-10-15 19:07:23,222 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:07:23,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 723 events. 328/723 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 403 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-10-15 19:07:23,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 723 transitions, 1446 flow [2021-10-15 19:07:23,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 393 places, 718 transitions, 1436 flow [2021-10-15 19:07:23,275 INFO L129 PetriNetUnfolder]: 57/176 cut-off events. [2021-10-15 19:07:23,278 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:07:23,279 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:23,279 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:23,280 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2021-10-15 19:07:23,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:23,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315064207] [2021-10-15 19:07:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:23,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:23,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:23,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315064207] [2021-10-15 19:07:23,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315064207] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:23,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:23,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:07:23,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159365682] [2021-10-15 19:07:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:23,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:23,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:23,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 718 transitions, 1436 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:23,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:23,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:23,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:26,023 INFO L129 PetriNetUnfolder]: 386/1107 cut-off events. [2021-10-15 19:07:26,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:07:26,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2206 conditions, 1107 events. 386/1107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1152 event pairs, 0 based on Foata normal form. 61/722 useless extension candidates. Maximal degree in co-relation 1. Up to 700 conditions per place. [2021-10-15 19:07:26,034 INFO L132 encePairwiseOnDemand]: 336/723 looper letters, 903 selfloop transitions, 133 changer transitions 61/1103 dead transitions. [2021-10-15 19:07:26,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1103 transitions, 4400 flow [2021-10-15 19:07:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1389 transitions. [2021-10-15 19:07:26,061 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640387275242047 [2021-10-15 19:07:26,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1389 transitions. [2021-10-15 19:07:26,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1389 transitions. [2021-10-15 19:07:26,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:26,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1389 transitions. [2021-10-15 19:07:26,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 463.0) internal successors, (1389), 3 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:26,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:26,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:26,100 INFO L186 Difference]: Start difference. First operand has 393 places, 718 transitions, 1436 flow. Second operand 3 states and 1389 transitions. [2021-10-15 19:07:26,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1103 transitions, 4400 flow [2021-10-15 19:07:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1103 transitions, 4400 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:07:26,146 INFO L242 Difference]: Finished difference. Result has 397 places, 717 transitions, 2472 flow [2021-10-15 19:07:26,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2472, PETRI_PLACES=397, PETRI_TRANSITIONS=717} [2021-10-15 19:07:26,150 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, 4 predicate places. [2021-10-15 19:07:26,150 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 717 transitions, 2472 flow [2021-10-15 19:07:26,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:26,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:26,152 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:26,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:07:26,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash -875862303, now seen corresponding path program 1 times [2021-10-15 19:07:26,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:26,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777750339] [2021-10-15 19:07:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:26,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:26,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:26,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777750339] [2021-10-15 19:07:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777750339] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:26,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:07:26,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558509368] [2021-10-15 19:07:26,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:26,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:26,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:26,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 717 transitions, 2472 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:26,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:26,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:26,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:28,498 INFO L129 PetriNetUnfolder]: 373/1363 cut-off events. [2021-10-15 19:07:28,498 INFO L130 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2021-10-15 19:07:28,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1363 events. 373/1363 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1870 event pairs, 0 based on Foata normal form. 132/1495 useless extension candidates. Maximal degree in co-relation 1438. Up to 979 conditions per place. [2021-10-15 19:07:28,510 INFO L132 encePairwiseOnDemand]: 590/723 looper letters, 900 selfloop transitions, 124 changer transitions 0/1030 dead transitions. [2021-10-15 19:07:28,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1030 transitions, 5172 flow [2021-10-15 19:07:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2021-10-15 19:07:28,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4900875979714154 [2021-10-15 19:07:28,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2021-10-15 19:07:28,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2021-10-15 19:07:28,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:28,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2021-10-15 19:07:28,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:28,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:28,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:28,530 INFO L186 Difference]: Start difference. First operand has 397 places, 717 transitions, 2472 flow. Second operand 3 states and 1063 transitions. [2021-10-15 19:07:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1030 transitions, 5172 flow [2021-10-15 19:07:28,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1030 transitions, 4856 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:28,579 INFO L242 Difference]: Finished difference. Result has 339 places, 705 transitions, 2792 flow [2021-10-15 19:07:28,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2792, PETRI_PLACES=339, PETRI_TRANSITIONS=705} [2021-10-15 19:07:28,581 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -54 predicate places. [2021-10-15 19:07:28,581 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 705 transitions, 2792 flow [2021-10-15 19:07:28,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:28,582 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:28,582 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:28,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:07:28,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1793885286, now seen corresponding path program 1 times [2021-10-15 19:07:28,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:28,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611635510] [2021-10-15 19:07:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:28,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:28,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:28,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611635510] [2021-10-15 19:07:28,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611635510] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:28,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:28,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:07:28,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697539765] [2021-10-15 19:07:28,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:28,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:28,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:28,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 705 transitions, 2792 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:28,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:28,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:28,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:31,311 INFO L129 PetriNetUnfolder]: 488/2465 cut-off events. [2021-10-15 19:07:31,311 INFO L130 PetriNetUnfolder]: For 876/876 co-relation queries the response was YES. [2021-10-15 19:07:31,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5804 conditions, 2465 events. 488/2465 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 6353 event pairs, 0 based on Foata normal form. 258/2723 useless extension candidates. Maximal degree in co-relation 3598. Up to 1334 conditions per place. [2021-10-15 19:07:31,327 INFO L132 encePairwiseOnDemand]: 457/723 looper letters, 829 selfloop transitions, 310 changer transitions 0/1145 dead transitions. [2021-10-15 19:07:31,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1145 transitions, 6358 flow [2021-10-15 19:07:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1208 transitions. [2021-10-15 19:07:31,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569386814200092 [2021-10-15 19:07:31,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1208 transitions. [2021-10-15 19:07:31,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1208 transitions. [2021-10-15 19:07:31,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:31,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1208 transitions. [2021-10-15 19:07:31,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.6666666666667) internal successors, (1208), 3 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:31,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:31,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:31,348 INFO L186 Difference]: Start difference. First operand has 339 places, 705 transitions, 2792 flow. Second operand 3 states and 1208 transitions. [2021-10-15 19:07:31,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1145 transitions, 6358 flow [2021-10-15 19:07:31,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1145 transitions, 6044 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:31,398 INFO L242 Difference]: Finished difference. Result has 341 places, 820 transitions, 4714 flow [2021-10-15 19:07:31,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4714, PETRI_PLACES=341, PETRI_TRANSITIONS=820} [2021-10-15 19:07:31,400 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -52 predicate places. [2021-10-15 19:07:31,400 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 820 transitions, 4714 flow [2021-10-15 19:07:31,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:31,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:31,401 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:31,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:07:31,402 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1697546055, now seen corresponding path program 1 times [2021-10-15 19:07:31,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:31,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376356646] [2021-10-15 19:07:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:31,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:31,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:31,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376356646] [2021-10-15 19:07:31,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376356646] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:31,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:31,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:31,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904974455] [2021-10-15 19:07:31,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:31,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:31,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:31,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 820 transitions, 4714 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:31,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:31,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:31,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:34,493 INFO L129 PetriNetUnfolder]: 572/3207 cut-off events. [2021-10-15 19:07:34,493 INFO L130 PetriNetUnfolder]: For 2413/2413 co-relation queries the response was YES. [2021-10-15 19:07:34,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8157 conditions, 3207 events. 572/3207 cut-off events. For 2413/2413 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9597 event pairs, 0 based on Foata normal form. 182/3389 useless extension candidates. Maximal degree in co-relation 4078. Up to 2111 conditions per place. [2021-10-15 19:07:34,513 INFO L132 encePairwiseOnDemand]: 473/723 looper letters, 868 selfloop transitions, 355 changer transitions 0/1229 dead transitions. [2021-10-15 19:07:34,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1229 transitions, 8446 flow [2021-10-15 19:07:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-10-15 19:07:34,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5265099124020286 [2021-10-15 19:07:34,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-10-15 19:07:34,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-10-15 19:07:34,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:34,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-10-15 19:07:34,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,535 INFO L186 Difference]: Start difference. First operand has 341 places, 820 transitions, 4714 flow. Second operand 3 states and 1142 transitions. [2021-10-15 19:07:34,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1229 transitions, 8446 flow [2021-10-15 19:07:34,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1229 transitions, 7712 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:34,604 INFO L242 Difference]: Finished difference. Result has 343 places, 904 transitions, 6354 flow [2021-10-15 19:07:34,605 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6354, PETRI_PLACES=343, PETRI_TRANSITIONS=904} [2021-10-15 19:07:34,606 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -50 predicate places. [2021-10-15 19:07:34,606 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 904 transitions, 6354 flow [2021-10-15 19:07:34,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:34,607 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:34,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:07:34,608 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1864604121, now seen corresponding path program 1 times [2021-10-15 19:07:34,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:34,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644044154] [2021-10-15 19:07:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:34,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-15 19:07:34,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:34,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644044154] [2021-10-15 19:07:34,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644044154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:34,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:34,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:07:34,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484383430] [2021-10-15 19:07:34,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:34,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:34,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 904 transitions, 6354 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:34,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:34,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:38,790 INFO L129 PetriNetUnfolder]: 646/4597 cut-off events. [2021-10-15 19:07:38,790 INFO L130 PetriNetUnfolder]: For 5288/5288 co-relation queries the response was YES. [2021-10-15 19:07:38,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11706 conditions, 4597 events. 646/4597 cut-off events. For 5288/5288 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 14064 event pairs, 0 based on Foata normal form. 276/4873 useless extension candidates. Maximal degree in co-relation 5994. Up to 3181 conditions per place. [2021-10-15 19:07:38,811 INFO L132 encePairwiseOnDemand]: 518/723 looper letters, 790 selfloop transitions, 76 changer transitions 431/1303 dead transitions. [2021-10-15 19:07:38,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1303 transitions, 10310 flow [2021-10-15 19:07:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-10-15 19:07:38,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5265099124020286 [2021-10-15 19:07:38,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-10-15 19:07:38,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-10-15 19:07:38,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:38,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-10-15 19:07:38,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:38,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:38,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:38,832 INFO L186 Difference]: Start difference. First operand has 343 places, 904 transitions, 6354 flow. Second operand 3 states and 1142 transitions. [2021-10-15 19:07:38,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1303 transitions, 10310 flow [2021-10-15 19:07:38,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1303 transitions, 9344 flow, removed 75 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:38,922 INFO L242 Difference]: Finished difference. Result has 345 places, 547 transitions, 2922 flow [2021-10-15 19:07:38,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=5494, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2922, PETRI_PLACES=345, PETRI_TRANSITIONS=547} [2021-10-15 19:07:38,924 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -48 predicate places. [2021-10-15 19:07:38,924 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 547 transitions, 2922 flow [2021-10-15 19:07:38,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:38,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:38,925 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:38,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:07:38,926 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -811301892, now seen corresponding path program 1 times [2021-10-15 19:07:38,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:38,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805388296] [2021-10-15 19:07:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:38,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2021-10-15 19:07:39,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:39,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805388296] [2021-10-15 19:07:39,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805388296] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:39,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:39,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:07:39,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375839448] [2021-10-15 19:07:39,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:39,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:39,099 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:39,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 547 transitions, 2922 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:39,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:39,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:39,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:43,082 INFO L129 PetriNetUnfolder]: 376/6630 cut-off events. [2021-10-15 19:07:43,082 INFO L130 PetriNetUnfolder]: For 3158/3158 co-relation queries the response was YES. [2021-10-15 19:07:43,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14790 conditions, 6630 events. 376/6630 cut-off events. For 3158/3158 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 32744 event pairs, 0 based on Foata normal form. 48/6678 useless extension candidates. Maximal degree in co-relation 7005. Up to 3485 conditions per place. [2021-10-15 19:07:43,109 INFO L132 encePairwiseOnDemand]: 636/723 looper letters, 881 selfloop transitions, 146 changer transitions 0/1033 dead transitions. [2021-10-15 19:07:43,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1033 transitions, 7320 flow [2021-10-15 19:07:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-10-15 19:07:43,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4020285846011987 [2021-10-15 19:07:43,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-10-15 19:07:43,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-10-15 19:07:43,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:43,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-10-15 19:07:43,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:43,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:43,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:43,126 INFO L186 Difference]: Start difference. First operand has 345 places, 547 transitions, 2922 flow. Second operand 3 states and 872 transitions. [2021-10-15 19:07:43,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1033 transitions, 7320 flow [2021-10-15 19:07:43,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1033 transitions, 6694 flow, removed 180 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:43,167 INFO L242 Difference]: Finished difference. Result has 347 places, 681 transitions, 4696 flow [2021-10-15 19:07:43,169 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4696, PETRI_PLACES=347, PETRI_TRANSITIONS=681} [2021-10-15 19:07:43,169 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -46 predicate places. [2021-10-15 19:07:43,169 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 681 transitions, 4696 flow [2021-10-15 19:07:43,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:43,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:43,171 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:43,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:07:43,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:43,172 INFO L82 PathProgramCache]: Analyzing trace with hash 497591129, now seen corresponding path program 1 times [2021-10-15 19:07:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:43,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675658154] [2021-10-15 19:07:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:43,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-10-15 19:07:43,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:43,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675658154] [2021-10-15 19:07:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675658154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:43,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:43,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652758422] [2021-10-15 19:07:43,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:07:43,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:07:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:07:43,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 723 [2021-10-15 19:07:43,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 681 transitions, 4696 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:43,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:43,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 723 [2021-10-15 19:07:43,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:48,195 INFO L129 PetriNetUnfolder]: 375/6682 cut-off events. [2021-10-15 19:07:48,196 INFO L130 PetriNetUnfolder]: For 3442/3442 co-relation queries the response was YES. [2021-10-15 19:07:48,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15024 conditions, 6682 events. 375/6682 cut-off events. For 3442/3442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 30589 event pairs, 0 based on Foata normal form. 1/6683 useless extension candidates. Maximal degree in co-relation 7055. Up to 6005 conditions per place. [2021-10-15 19:07:48,217 INFO L132 encePairwiseOnDemand]: 649/723 looper letters, 759 selfloop transitions, 245 changer transitions 0/1009 dead transitions. [2021-10-15 19:07:48,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1009 transitions, 7356 flow [2021-10-15 19:07:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:07:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:07:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 795 transitions. [2021-10-15 19:07:48,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.21991701244813278 [2021-10-15 19:07:48,223 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 795 transitions. [2021-10-15 19:07:48,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 795 transitions. [2021-10-15 19:07:48,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:48,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 795 transitions. [2021-10-15 19:07:48,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:48,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:48,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:48,238 INFO L186 Difference]: Start difference. First operand has 347 places, 681 transitions, 4696 flow. Second operand 5 states and 795 transitions. [2021-10-15 19:07:48,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1009 transitions, 7356 flow [2021-10-15 19:07:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1009 transitions, 7066 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:48,284 INFO L242 Difference]: Finished difference. Result has 352 places, 684 transitions, 5152 flow [2021-10-15 19:07:48,286 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5152, PETRI_PLACES=352, PETRI_TRANSITIONS=684} [2021-10-15 19:07:48,286 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -41 predicate places. [2021-10-15 19:07:48,286 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 684 transitions, 5152 flow [2021-10-15 19:07:48,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:48,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:48,288 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:48,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:07:48,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1690709512, now seen corresponding path program 1 times [2021-10-15 19:07:48,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:48,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228352318] [2021-10-15 19:07:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:48,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 832 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-10-15 19:07:48,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:48,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228352318] [2021-10-15 19:07:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228352318] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:48,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:48,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:48,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52196135] [2021-10-15 19:07:48,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:07:48,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:07:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:07:48,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:48,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 684 transitions, 5152 flow. Second operand has 4 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:48,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:48,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:48,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:57,255 INFO L129 PetriNetUnfolder]: 612/11558 cut-off events. [2021-10-15 19:07:57,256 INFO L130 PetriNetUnfolder]: For 10375/10375 co-relation queries the response was YES. [2021-10-15 19:07:57,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26088 conditions, 11558 events. 612/11558 cut-off events. For 10375/10375 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 64581 event pairs, 0 based on Foata normal form. 124/11682 useless extension candidates. Maximal degree in co-relation 15598. Up to 5504 conditions per place. [2021-10-15 19:07:57,301 INFO L132 encePairwiseOnDemand]: 625/723 looper letters, 1207 selfloop transitions, 356 changer transitions 0/1571 dead transitions. [2021-10-15 19:07:57,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1571 transitions, 12547 flow [2021-10-15 19:07:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:07:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:07:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2021-10-15 19:07:57,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4505532503457815 [2021-10-15 19:07:57,308 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2021-10-15 19:07:57,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2021-10-15 19:07:57,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:57,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2021-10-15 19:07:57,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,322 INFO L186 Difference]: Start difference. First operand has 352 places, 684 transitions, 5152 flow. Second operand 4 states and 1303 transitions. [2021-10-15 19:07:57,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1571 transitions, 12547 flow [2021-10-15 19:07:57,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1571 transitions, 12537 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-10-15 19:07:57,428 INFO L242 Difference]: Finished difference. Result has 358 places, 914 transitions, 9864 flow [2021-10-15 19:07:57,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=5065, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9864, PETRI_PLACES=358, PETRI_TRANSITIONS=914} [2021-10-15 19:07:57,430 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -35 predicate places. [2021-10-15 19:07:57,430 INFO L470 AbstractCegarLoop]: Abstraction has has 358 places, 914 transitions, 9864 flow [2021-10-15 19:07:57,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:57,432 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:57,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:07:57,432 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1870830744, now seen corresponding path program 1 times [2021-10-15 19:07:57,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:57,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569160559] [2021-10-15 19:07:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:57,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1798 backedges. 1259 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-10-15 19:07:57,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:57,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569160559] [2021-10-15 19:07:57,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569160559] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:57,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:57,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:57,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011006143] [2021-10-15 19:07:57,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:57,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:57,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:57,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 914 transitions, 9864 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:57,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:57,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:13,779 INFO L129 PetriNetUnfolder]: 907/16160 cut-off events. [2021-10-15 19:08:13,779 INFO L130 PetriNetUnfolder]: For 23489/23489 co-relation queries the response was YES. [2021-10-15 19:08:13,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38130 conditions, 16160 events. 907/16160 cut-off events. For 23489/23489 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 92270 event pairs, 0 based on Foata normal form. 91/16251 useless extension candidates. Maximal degree in co-relation 25365. Up to 11308 conditions per place. [2021-10-15 19:08:13,838 INFO L132 encePairwiseOnDemand]: 625/723 looper letters, 1108 selfloop transitions, 405 changer transitions 0/1521 dead transitions. [2021-10-15 19:08:13,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1521 transitions, 17974 flow [2021-10-15 19:08:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:08:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:08:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-10-15 19:08:13,842 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4020285846011987 [2021-10-15 19:08:13,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-10-15 19:08:13,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-10-15 19:08:13,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:13,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-10-15 19:08:13,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:13,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:13,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:13,853 INFO L186 Difference]: Start difference. First operand has 358 places, 914 transitions, 9864 flow. Second operand 3 states and 872 transitions. [2021-10-15 19:08:13,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1521 transitions, 17974 flow [2021-10-15 19:08:13,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1521 transitions, 17974 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:08:13,993 INFO L242 Difference]: Finished difference. Result has 362 places, 1196 transitions, 16534 flow [2021-10-15 19:08:13,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=9813, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=16534, PETRI_PLACES=362, PETRI_TRANSITIONS=1196} [2021-10-15 19:08:13,995 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -31 predicate places. [2021-10-15 19:08:13,995 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 1196 transitions, 16534 flow [2021-10-15 19:08:13,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:13,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:13,997 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:13,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:08:13,998 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:13,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1829916810, now seen corresponding path program 1 times [2021-10-15 19:08:13,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:13,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23971839] [2021-10-15 19:08:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:13,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2508 backedges. 1400 proven. 0 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2021-10-15 19:08:14,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:14,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23971839] [2021-10-15 19:08:14,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23971839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:14,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:08:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576607615] [2021-10-15 19:08:14,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:08:14,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:14,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:08:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:08:14,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:08:14,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1196 transitions, 16534 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:14,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:14,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:08:14,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:34,957 INFO L129 PetriNetUnfolder]: 904/16157 cut-off events. [2021-10-15 19:08:34,957 INFO L130 PetriNetUnfolder]: For 30018/30018 co-relation queries the response was YES. [2021-10-15 19:08:34,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39274 conditions, 16157 events. 904/16157 cut-off events. For 30018/30018 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 90577 event pairs, 0 based on Foata normal form. 3/16160 useless extension candidates. Maximal degree in co-relation 26190. Up to 15203 conditions per place. [2021-10-15 19:08:35,022 INFO L132 encePairwiseOnDemand]: 716/723 looper letters, 1507 selfloop transitions, 5 changer transitions 0/1520 dead transitions. [2021-10-15 19:08:35,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1520 transitions, 20186 flow [2021-10-15 19:08:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:08:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:08:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2021-10-15 19:08:35,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36053480866758875 [2021-10-15 19:08:35,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2021-10-15 19:08:35,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2021-10-15 19:08:35,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:35,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2021-10-15 19:08:35,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:35,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:35,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:35,039 INFO L186 Difference]: Start difference. First operand has 362 places, 1196 transitions, 16534 flow. Second operand 3 states and 782 transitions. [2021-10-15 19:08:35,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1520 transitions, 20186 flow [2021-10-15 19:08:35,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1520 transitions, 18730 flow, removed 325 selfloop flow, removed 2 redundant places. [2021-10-15 19:08:35,188 INFO L242 Difference]: Finished difference. Result has 363 places, 1194 transitions, 15056 flow [2021-10-15 19:08:35,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=15039, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15056, PETRI_PLACES=363, PETRI_TRANSITIONS=1194} [2021-10-15 19:08:35,190 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -30 predicate places. [2021-10-15 19:08:35,191 INFO L470 AbstractCegarLoop]: Abstraction has has 363 places, 1194 transitions, 15056 flow [2021-10-15 19:08:35,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:35,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:35,192 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:35,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:08:35,193 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:35,194 INFO L82 PathProgramCache]: Analyzing trace with hash -642843304, now seen corresponding path program 1 times [2021-10-15 19:08:35,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:35,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697576961] [2021-10-15 19:08:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:35,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2630 backedges. 1782 proven. 0 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2021-10-15 19:08:35,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:35,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697576961] [2021-10-15 19:08:35,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697576961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:35,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:35,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:08:35,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583615623] [2021-10-15 19:08:35,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:08:35,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:08:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:08:35,735 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:08:35,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1194 transitions, 15056 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:35,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:35,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:08:35,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:57,313 INFO L129 PetriNetUnfolder]: 852/19081 cut-off events. [2021-10-15 19:08:57,313 INFO L130 PetriNetUnfolder]: For 30275/30275 co-relation queries the response was YES. [2021-10-15 19:08:57,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43986 conditions, 19081 events. 852/19081 cut-off events. For 30275/30275 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 113124 event pairs, 0 based on Foata normal form. 312/19393 useless extension candidates. Maximal degree in co-relation 32195. Up to 14360 conditions per place. [2021-10-15 19:08:57,376 INFO L132 encePairwiseOnDemand]: 626/723 looper letters, 1277 selfloop transitions, 185 changer transitions 0/1470 dead transitions. [2021-10-15 19:08:57,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1470 transitions, 17797 flow [2021-10-15 19:08:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:08:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:08:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-10-15 19:08:57,380 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4020285846011987 [2021-10-15 19:08:57,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-10-15 19:08:57,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-10-15 19:08:57,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:57,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-10-15 19:08:57,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:57,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:57,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:57,390 INFO L186 Difference]: Start difference. First operand has 363 places, 1194 transitions, 15056 flow. Second operand 3 states and 872 transitions. [2021-10-15 19:08:57,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1470 transitions, 17797 flow [2021-10-15 19:08:57,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1470 transitions, 17788 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:08:57,517 INFO L242 Difference]: Finished difference. Result has 366 places, 1145 transitions, 15382 flow [2021-10-15 19:08:57,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13472, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15382, PETRI_PLACES=366, PETRI_TRANSITIONS=1145} [2021-10-15 19:08:57,519 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -27 predicate places. [2021-10-15 19:08:57,520 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 1145 transitions, 15382 flow [2021-10-15 19:08:57,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:57,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:57,521 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:57,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:08:57,522 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1428675599, now seen corresponding path program 1 times [2021-10-15 19:08:57,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:57,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827813680] [2021-10-15 19:08:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:57,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 759 proven. 0 refuted. 0 times theorem prover too weak. 1877 trivial. 0 not checked. [2021-10-15 19:08:58,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:58,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827813680] [2021-10-15 19:08:58,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827813680] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:58,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:58,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:08:58,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106375862] [2021-10-15 19:08:58,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:08:58,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:08:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:08:58,016 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:08:58,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1145 transitions, 15382 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:58,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:58,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:08:58,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:21,990 INFO L129 PetriNetUnfolder]: 744/21614 cut-off events. [2021-10-15 19:09:21,990 INFO L130 PetriNetUnfolder]: For 34120/34120 co-relation queries the response was YES. [2021-10-15 19:09:22,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48715 conditions, 21614 events. 744/21614 cut-off events. For 34120/34120 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 134945 event pairs, 0 based on Foata normal form. 317/21931 useless extension candidates. Maximal degree in co-relation 36828. Up to 15230 conditions per place. [2021-10-15 19:09:22,066 INFO L132 encePairwiseOnDemand]: 651/723 looper letters, 1206 selfloop transitions, 110 changer transitions 38/1362 dead transitions. [2021-10-15 19:09:22,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1362 transitions, 16591 flow [2021-10-15 19:09:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2021-10-15 19:09:22,069 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3868142000922084 [2021-10-15 19:09:22,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2021-10-15 19:09:22,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2021-10-15 19:09:22,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:22,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2021-10-15 19:09:22,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:22,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:22,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:22,080 INFO L186 Difference]: Start difference. First operand has 366 places, 1145 transitions, 15382 flow. Second operand 3 states and 839 transitions. [2021-10-15 19:09:22,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1362 transitions, 16591 flow [2021-10-15 19:09:22,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1362 transitions, 16299 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:22,207 INFO L242 Difference]: Finished difference. Result has 368 places, 999 transitions, 13072 flow [2021-10-15 19:09:22,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=11970, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13072, PETRI_PLACES=368, PETRI_TRANSITIONS=999} [2021-10-15 19:09:22,209 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -25 predicate places. [2021-10-15 19:09:22,210 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 999 transitions, 13072 flow [2021-10-15 19:09:22,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:22,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:22,211 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:09:22,212 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:09:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -694063183, now seen corresponding path program 1 times [2021-10-15 19:09:22,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:22,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043847137] [2021-10-15 19:09:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:22,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3680 backedges. 2392 proven. 0 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2021-10-15 19:09:22,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:22,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043847137] [2021-10-15 19:09:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043847137] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:22,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:22,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:22,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411465965] [2021-10-15 19:09:22,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:22,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:22,815 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:09:22,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 999 transitions, 13072 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:22,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:22,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:09:22,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:45,634 INFO L129 PetriNetUnfolder]: 653/20201 cut-off events. [2021-10-15 19:09:45,634 INFO L130 PetriNetUnfolder]: For 25667/25667 co-relation queries the response was YES. [2021-10-15 19:09:45,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45464 conditions, 20201 events. 653/20201 cut-off events. For 25667/25667 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 122394 event pairs, 0 based on Foata normal form. 91/20292 useless extension candidates. Maximal degree in co-relation 34513. Up to 16790 conditions per place. [2021-10-15 19:09:45,698 INFO L132 encePairwiseOnDemand]: 669/723 looper letters, 1108 selfloop transitions, 159 changer transitions 0/1275 dead transitions. [2021-10-15 19:09:45,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1275 transitions, 15332 flow [2021-10-15 19:09:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2021-10-15 19:09:45,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3771323190410327 [2021-10-15 19:09:45,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2021-10-15 19:09:45,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2021-10-15 19:09:45,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:45,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2021-10-15 19:09:45,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:45,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:45,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:45,710 INFO L186 Difference]: Start difference. First operand has 368 places, 999 transitions, 13072 flow. Second operand 3 states and 818 transitions. [2021-10-15 19:09:45,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1275 transitions, 15332 flow [2021-10-15 19:09:45,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1275 transitions, 15096 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:45,805 INFO L242 Difference]: Finished difference. Result has 370 places, 950 transitions, 12610 flow [2021-10-15 19:09:45,806 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=11773, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12610, PETRI_PLACES=370, PETRI_TRANSITIONS=950} [2021-10-15 19:09:45,806 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -23 predicate places. [2021-10-15 19:09:45,806 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 950 transitions, 12610 flow [2021-10-15 19:09:45,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:45,807 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:45,808 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:45,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:09:45,809 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:09:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -651513488, now seen corresponding path program 1 times [2021-10-15 19:09:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:45,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425230647] [2021-10-15 19:09:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:45,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3808 backedges. 2614 proven. 0 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2021-10-15 19:09:46,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:46,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425230647] [2021-10-15 19:09:46,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425230647] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:46,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:46,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:46,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600142894] [2021-10-15 19:09:46,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:46,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:46,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:09:46,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 950 transitions, 12610 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:46,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:46,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:09:46,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:10:08,101 INFO L129 PetriNetUnfolder]: 543/20091 cut-off events. [2021-10-15 19:10:08,102 INFO L130 PetriNetUnfolder]: For 24516/24516 co-relation queries the response was YES. [2021-10-15 19:10:08,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44646 conditions, 20091 events. 543/20091 cut-off events. For 24516/24516 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 121358 event pairs, 0 based on Foata normal form. 110/20201 useless extension candidates. Maximal degree in co-relation 30909. Up to 17019 conditions per place. [2021-10-15 19:10:08,166 INFO L132 encePairwiseOnDemand]: 651/723 looper letters, 1027 selfloop transitions, 132 changer transitions 0/1167 dead transitions. [2021-10-15 19:10:08,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1167 transitions, 13638 flow [2021-10-15 19:10:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:10:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:10:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2021-10-15 19:10:08,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3822037805440295 [2021-10-15 19:10:08,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2021-10-15 19:10:08,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2021-10-15 19:10:08,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:10:08,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2021-10-15 19:10:08,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:08,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:08,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:08,175 INFO L186 Difference]: Start difference. First operand has 370 places, 950 transitions, 12610 flow. Second operand 3 states and 829 transitions. [2021-10-15 19:10:08,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1167 transitions, 13638 flow [2021-10-15 19:10:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1167 transitions, 13330 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:10:08,274 INFO L242 Difference]: Finished difference. Result has 370 places, 842 transitions, 10624 flow [2021-10-15 19:10:08,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=10360, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=10624, PETRI_PLACES=370, PETRI_TRANSITIONS=842} [2021-10-15 19:10:08,275 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -23 predicate places. [2021-10-15 19:10:08,275 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 842 transitions, 10624 flow [2021-10-15 19:10:08,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:08,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:10:08,276 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:08,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:10:08,276 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:10:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1325704162, now seen corresponding path program 1 times [2021-10-15 19:10:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:08,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738849835] [2021-10-15 19:10:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:08,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 1307 proven. 0 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-10-15 19:10:08,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:08,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738849835] [2021-10-15 19:10:08,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738849835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:08,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:08,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:10:08,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82423808] [2021-10-15 19:10:08,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:10:08,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:10:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:10:08,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:10:08,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 842 transitions, 10624 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:08,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:10:08,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:10:08,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:10:29,795 INFO L129 PetriNetUnfolder]: 411/19959 cut-off events. [2021-10-15 19:10:29,795 INFO L130 PetriNetUnfolder]: For 20829/20829 co-relation queries the response was YES. [2021-10-15 19:10:29,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43218 conditions, 19959 events. 411/19959 cut-off events. For 20829/20829 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 118382 event pairs, 0 based on Foata normal form. 132/20091 useless extension candidates. Maximal degree in co-relation 28529. Up to 14309 conditions per place. [2021-10-15 19:10:29,871 INFO L132 encePairwiseOnDemand]: 660/723 looper letters, 877 selfloop transitions, 163 changer transitions 0/1048 dead transitions. [2021-10-15 19:10:29,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1048 transitions, 10966 flow [2021-10-15 19:10:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:10:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:10:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2021-10-15 19:10:29,874 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37252189949285386 [2021-10-15 19:10:29,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2021-10-15 19:10:29,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2021-10-15 19:10:29,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:10:29,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2021-10-15 19:10:29,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:29,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:29,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:29,879 INFO L186 Difference]: Start difference. First operand has 370 places, 842 transitions, 10624 flow. Second operand 3 states and 808 transitions. [2021-10-15 19:10:29,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1048 transitions, 10966 flow [2021-10-15 19:10:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1048 transitions, 10846 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:10:30,143 INFO L242 Difference]: Finished difference. Result has 371 places, 723 transitions, 8440 flow [2021-10-15 19:10:30,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=8114, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8440, PETRI_PLACES=371, PETRI_TRANSITIONS=723} [2021-10-15 19:10:30,145 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -22 predicate places. [2021-10-15 19:10:30,145 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 723 transitions, 8440 flow [2021-10-15 19:10:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:30,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:10:30,147 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:10:30,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:10:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2136076281, now seen corresponding path program 1 times [2021-10-15 19:10:30,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:30,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509993052] [2021-10-15 19:10:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:30,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5379 backedges. 3628 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-10-15 19:10:30,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:30,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509993052] [2021-10-15 19:10:30,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509993052] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:30,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:30,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:10:30,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351191496] [2021-10-15 19:10:30,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:10:30,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:10:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:10:30,908 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:10:30,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 723 transitions, 8440 flow. Second operand has 3 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:30,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:10:30,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:10:30,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:10:50,399 INFO L129 PetriNetUnfolder]: 407/19955 cut-off events. [2021-10-15 19:10:50,400 INFO L130 PetriNetUnfolder]: For 16260/16260 co-relation queries the response was YES. [2021-10-15 19:10:50,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43314 conditions, 19955 events. 407/19955 cut-off events. For 16260/16260 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 113782 event pairs, 0 based on Foata normal form. 4/19959 useless extension candidates. Maximal degree in co-relation 24758. Up to 18589 conditions per place. [2021-10-15 19:10:50,464 INFO L132 encePairwiseOnDemand]: 710/723 looper letters, 1010 selfloop transitions, 27 changer transitions 0/1045 dead transitions. [2021-10-15 19:10:50,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1045 transitions, 11117 flow [2021-10-15 19:10:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:10:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:10:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2021-10-15 19:10:50,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35684647302904565 [2021-10-15 19:10:50,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2021-10-15 19:10:50,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2021-10-15 19:10:50,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:10:50,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2021-10-15 19:10:50,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:50,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:50,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:50,473 INFO L186 Difference]: Start difference. First operand has 371 places, 723 transitions, 8440 flow. Second operand 3 states and 774 transitions. [2021-10-15 19:10:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1045 transitions, 11117 flow [2021-10-15 19:10:50,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1045 transitions, 10955 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:10:50,562 INFO L242 Difference]: Finished difference. Result has 372 places, 720 transitions, 8283 flow [2021-10-15 19:10:50,563 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8283, PETRI_PLACES=372, PETRI_TRANSITIONS=720} [2021-10-15 19:10:50,564 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -21 predicate places. [2021-10-15 19:10:50,564 INFO L470 AbstractCegarLoop]: Abstraction has has 372 places, 720 transitions, 8283 flow [2021-10-15 19:10:50,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:50,564 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:10:50,565 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:50,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:10:50,566 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:10:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:50,567 INFO L82 PathProgramCache]: Analyzing trace with hash -246179009, now seen corresponding path program 1 times [2021-10-15 19:10:50,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:50,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111706789] [2021-10-15 19:10:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:50,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5471 backedges. 3113 proven. 0 refuted. 0 times theorem prover too weak. 2358 trivial. 0 not checked. [2021-10-15 19:10:51,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:51,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111706789] [2021-10-15 19:10:51,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111706789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:51,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:51,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:10:51,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060342118] [2021-10-15 19:10:51,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:10:51,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:10:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:10:51,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:10:51,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 720 transitions, 8283 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:10:51,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:10:51,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:10:51,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:10,442 INFO L129 PetriNetUnfolder]: 378/19926 cut-off events. [2021-10-15 19:11:10,442 INFO L130 PetriNetUnfolder]: For 15887/15887 co-relation queries the response was YES. [2021-10-15 19:11:10,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42911 conditions, 19926 events. 378/19926 cut-off events. For 15887/15887 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 113744 event pairs, 0 based on Foata normal form. 29/19955 useless extension candidates. Maximal degree in co-relation 38476. Up to 9980 conditions per place. [2021-10-15 19:11:10,503 INFO L132 encePairwiseOnDemand]: 688/723 looper letters, 927 selfloop transitions, 84 changer transitions 0/1019 dead transitions. [2021-10-15 19:11:10,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1019 transitions, 10410 flow [2021-10-15 19:11:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 778 transitions. [2021-10-15 19:11:10,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3586906408483172 [2021-10-15 19:11:10,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 778 transitions. [2021-10-15 19:11:10,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 778 transitions. [2021-10-15 19:11:10,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:10,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 778 transitions. [2021-10-15 19:11:10,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:10,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:10,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:10,510 INFO L186 Difference]: Start difference. First operand has 372 places, 720 transitions, 8283 flow. Second operand 3 states and 778 transitions. [2021-10-15 19:11:10,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1019 transitions, 10410 flow [2021-10-15 19:11:10,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1019 transitions, 10383 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:11:10,742 INFO L242 Difference]: Finished difference. Result has 373 places, 694 transitions, 7877 flow [2021-10-15 19:11:10,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=7709, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7877, PETRI_PLACES=373, PETRI_TRANSITIONS=694} [2021-10-15 19:11:10,744 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -20 predicate places. [2021-10-15 19:11:10,744 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 694 transitions, 7877 flow [2021-10-15 19:11:10,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:10,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:10,746 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:10,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:11:10,747 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1879188731, now seen corresponding path program 1 times [2021-10-15 19:11:10,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:10,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875983517] [2021-10-15 19:11:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:10,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7742 backedges. 4745 proven. 0 refuted. 0 times theorem prover too weak. 2997 trivial. 0 not checked. [2021-10-15 19:11:11,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:11,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875983517] [2021-10-15 19:11:11,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875983517] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:11,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:11,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541440058] [2021-10-15 19:11:11,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:11,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:11,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:11:11,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:11:11,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 694 transitions, 7877 flow. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:11,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:11,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:11:11,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:29,681 INFO L129 PetriNetUnfolder]: 380/20260 cut-off events. [2021-10-15 19:11:29,681 INFO L130 PetriNetUnfolder]: For 15642/15642 co-relation queries the response was YES. [2021-10-15 19:11:29,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43668 conditions, 20260 events. 380/20260 cut-off events. For 15642/15642 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 116388 event pairs, 0 based on Foata normal form. 6/20266 useless extension candidates. Maximal degree in co-relation 30893. Up to 18889 conditions per place. [2021-10-15 19:11:29,738 INFO L132 encePairwiseOnDemand]: 711/723 looper letters, 990 selfloop transitions, 23 changer transitions 0/1021 dead transitions. [2021-10-15 19:11:29,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1021 transitions, 10586 flow [2021-10-15 19:11:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2021-10-15 19:11:29,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3582295988934993 [2021-10-15 19:11:29,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2021-10-15 19:11:29,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2021-10-15 19:11:29,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:29,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2021-10-15 19:11:29,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:29,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:29,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:29,745 INFO L186 Difference]: Start difference. First operand has 373 places, 694 transitions, 7877 flow. Second operand 3 states and 777 transitions. [2021-10-15 19:11:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1021 transitions, 10586 flow [2021-10-15 19:11:29,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1021 transitions, 10502 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:11:29,810 INFO L242 Difference]: Finished difference. Result has 376 places, 696 transitions, 7932 flow [2021-10-15 19:11:29,811 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7932, PETRI_PLACES=376, PETRI_TRANSITIONS=696} [2021-10-15 19:11:29,811 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -17 predicate places. [2021-10-15 19:11:29,811 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 696 transitions, 7932 flow [2021-10-15 19:11:29,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:29,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:29,812 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:29,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 19:11:29,813 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -269737578, now seen corresponding path program 1 times [2021-10-15 19:11:29,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:29,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954101918] [2021-10-15 19:11:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:29,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 4522 proven. 196 refuted. 0 times theorem prover too weak. 2786 trivial. 0 not checked. [2021-10-15 19:11:30,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:30,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954101918] [2021-10-15 19:11:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954101918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:30,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270795035] [2021-10-15 19:11:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:30,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:30,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:30,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:11:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2215 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:11:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 4571 proven. 0 refuted. 0 times theorem prover too weak. 2933 trivial. 0 not checked. [2021-10-15 19:11:36,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270795035] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:36,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:11:36,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-10-15 19:11:36,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461147426] [2021-10-15 19:11:36,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:36,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:36,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:11:36,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:11:36,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 696 transitions, 7932 flow. Second operand has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:36,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:36,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:11:36,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:55,703 INFO L129 PetriNetUnfolder]: 372/20252 cut-off events. [2021-10-15 19:11:55,703 INFO L130 PetriNetUnfolder]: For 15800/15800 co-relation queries the response was YES. [2021-10-15 19:11:55,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43558 conditions, 20252 events. 372/20252 cut-off events. For 15800/15800 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 111220 event pairs, 0 based on Foata normal form. 8/20260 useless extension candidates. Maximal degree in co-relation 41265. Up to 18220 conditions per place. [2021-10-15 19:11:55,777 INFO L132 encePairwiseOnDemand]: 702/723 looper letters, 963 selfloop transitions, 43 changer transitions 0/1014 dead transitions. [2021-10-15 19:11:55,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1014 transitions, 10437 flow [2021-10-15 19:11:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2021-10-15 19:11:55,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.359612724757953 [2021-10-15 19:11:55,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2021-10-15 19:11:55,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2021-10-15 19:11:55,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:55,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2021-10-15 19:11:55,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:55,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:55,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:55,785 INFO L186 Difference]: Start difference. First operand has 376 places, 696 transitions, 7932 flow. Second operand 3 states and 780 transitions. [2021-10-15 19:11:55,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1014 transitions, 10437 flow [2021-10-15 19:11:55,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1014 transitions, 10375 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:55,854 INFO L242 Difference]: Finished difference. Result has 376 places, 689 transitions, 7797 flow [2021-10-15 19:11:55,854 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=7711, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7797, PETRI_PLACES=376, PETRI_TRANSITIONS=689} [2021-10-15 19:11:55,855 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -17 predicate places. [2021-10-15 19:11:55,855 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 689 transitions, 7797 flow [2021-10-15 19:11:55,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:55,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:55,856 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:55,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:11:56,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:56,057 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1815105400, now seen corresponding path program 1 times [2021-10-15 19:11:56,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:56,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065703000] [2021-10-15 19:11:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:56,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7279 backedges. 3606 proven. 0 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-10-15 19:11:56,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:56,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065703000] [2021-10-15 19:11:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065703000] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:56,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:56,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:56,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655575958] [2021-10-15 19:11:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:56,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:11:56,954 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:11:56,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 689 transitions, 7797 flow. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:56,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:56,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:11:56,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:19,269 INFO L129 PetriNetUnfolder]: 406/23266 cut-off events. [2021-10-15 19:12:19,269 INFO L130 PetriNetUnfolder]: For 17380/17380 co-relation queries the response was YES. [2021-10-15 19:12:19,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49853 conditions, 23266 events. 406/23266 cut-off events. For 17380/17380 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 134397 event pairs, 0 based on Foata normal form. 13/23279 useless extension candidates. Maximal degree in co-relation 46762. Up to 14551 conditions per place. [2021-10-15 19:12:19,328 INFO L132 encePairwiseOnDemand]: 646/723 looper letters, 0 selfloop transitions, 0 changer transitions 1046/1046 dead transitions. [2021-10-15 19:12:19,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1046 transitions, 11164 flow [2021-10-15 19:12:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2021-10-15 19:12:19,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3835869064084832 [2021-10-15 19:12:19,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2021-10-15 19:12:19,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2021-10-15 19:12:19,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:19,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2021-10-15 19:12:19,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:19,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:19,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:19,336 INFO L186 Difference]: Start difference. First operand has 376 places, 689 transitions, 7797 flow. Second operand 3 states and 832 transitions. [2021-10-15 19:12:19,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1046 transitions, 11164 flow [2021-10-15 19:12:19,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1046 transitions, 11154 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-10-15 19:12:19,403 INFO L242 Difference]: Finished difference. Result has 376 places, 0 transitions, 0 flow [2021-10-15 19:12:19,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=7622, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=376, PETRI_TRANSITIONS=0} [2021-10-15 19:12:19,404 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -17 predicate places. [2021-10-15 19:12:19,404 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 0 transitions, 0 flow [2021-10-15 19:12:19,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:19,406 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:12:19,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 19:12:19,410 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:12:19,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:12:19 BoogieIcfgContainer [2021-10-15 19:12:19,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:12:19,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:12:19,417 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:12:19,417 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:12:19,417 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:07:22" (3/4) ... [2021-10-15 19:12:19,420 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:12:19,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 19:12:19,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:12:19,472 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:12:19,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:12:19,681 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:12:19,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:12:19,683 INFO L168 Benchmark]: Toolchain (without parser) took 300970.75 ms. Allocated memory was 88.1 MB in the beginning and 5.2 GB in the end (delta: 5.2 GB). Free memory was 46.7 MB in the beginning and 3.4 GB in the end (delta: -3.3 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,683 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 67.8 MB in the beginning and 67.8 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:12:19,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1133.19 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 46.6 MB in the beginning and 78.0 MB in the end (delta: -31.4 MB). Peak memory consumption was 47.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,684 INFO L168 Benchmark]: Boogie Procedure Inliner took 154.20 ms. Allocated memory is still 109.1 MB. Free memory was 78.0 MB in the beginning and 54.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,685 INFO L168 Benchmark]: Boogie Preprocessor took 215.66 ms. Allocated memory is still 109.1 MB. Free memory was 54.5 MB in the beginning and 62.7 MB in the end (delta: -8.3 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,685 INFO L168 Benchmark]: RCFGBuilder took 2679.18 ms. Allocated memory was 109.1 MB in the beginning and 213.9 MB in the end (delta: 104.9 MB). Free memory was 62.4 MB in the beginning and 148.5 MB in the end (delta: -86.1 MB). Peak memory consumption was 72.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,685 INFO L168 Benchmark]: TraceAbstraction took 296514.44 ms. Allocated memory was 213.9 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 147.4 MB in the beginning and 3.4 GB in the end (delta: -3.3 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,686 INFO L168 Benchmark]: Witness Printer took 265.06 ms. Allocated memory is still 5.2 GB. Free memory was 3.4 GB in the beginning and 3.4 GB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:19,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 67.8 MB in the beginning and 67.8 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1133.19 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 46.6 MB in the beginning and 78.0 MB in the end (delta: -31.4 MB). Peak memory consumption was 47.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 154.20 ms. Allocated memory is still 109.1 MB. Free memory was 78.0 MB in the beginning and 54.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 215.66 ms. Allocated memory is still 109.1 MB. Free memory was 54.5 MB in the beginning and 62.7 MB in the end (delta: -8.3 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2679.18 ms. Allocated memory was 109.1 MB in the beginning and 213.9 MB in the end (delta: 104.9 MB). Free memory was 62.4 MB in the beginning and 148.5 MB in the end (delta: -86.1 MB). Peak memory consumption was 72.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 296514.44 ms. Allocated memory was 213.9 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 147.4 MB in the beginning and 3.4 GB in the end (delta: -3.3 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.1 GB. * Witness Printer took 265.06 ms. Allocated memory is still 5.2 GB. Free memory was 3.4 GB in the beginning and 3.4 GB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 203]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 396 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 14.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 296434.3ms, OverallIterations: 20, TraceHistogramMax: 12, EmptinessCheckTime: 0.0ms, AutomataDifference: 280011.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 277.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5119 SDtfs, 4513 SDslu, 59 SDs, 0 SdLazy, 16449 SolverSat, 2374 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19162.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1939 GetRequests, 1912 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16534occurred in iteration=9, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 868.1ms SsaConstructionTime, 2088.7ms SatisfiabilityAnalysisTime, 12466.0ms InterpolantComputationTime, 21614 NumberOfCodeBlocks, 21614 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 21593 ConstructedInterpolants, 0 QuantifiedInterpolants, 44296 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2215 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 21 InterpolantComputations, 20 PerfectInterpolantSequences, 64310/64506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:12:19,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb214228-319e-42e4-a6e1-66d4c59b197a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...