./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label50.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_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/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_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/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_52325231-0c05-4ef9-a7f6-fd5af157e19d/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 cf93ae511ae85a8156c5f973f24b1bb68928087b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 20:26:42,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:26:42,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:26:42,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:26:42,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:26:42,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:26:42,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:26:42,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:26:42,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:26:42,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:26:42,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:26:42,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:26:42,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:26:42,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:26:42,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:26:42,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:26:42,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:26:42,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:26:42,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:26:42,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:26:42,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:26:42,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:26:42,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:26:42,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:26:42,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:26:42,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:26:42,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:26:42,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:26:42,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:26:42,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:26:42,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:26:42,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:26:42,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:26:42,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:26:42,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:26:42,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:26:42,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:26:42,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:26:42,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:26:42,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:26:42,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:26:42,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:26:42,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:26:42,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:26:42,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:26:42,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:26:42,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:26:42,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:26:42,631 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:26:42,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:26:42,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:26:42,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:26:42,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:26:42,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:26:42,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:26:42,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:26:42,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:26:42,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:26:42,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:26:42,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:26:42,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:26:42,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:26:42,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:26:42,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:26:42,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:26:42,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:26:42,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:26:42,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:26:42,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:26:42,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:26:42,635 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:26:42,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:26:42,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:26:42,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:26:42,636 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_52325231-0c05-4ef9-a7f6-fd5af157e19d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf93ae511ae85a8156c5f973f24b1bb68928087b [2021-10-15 20:26:42,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:26:42,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:26:42,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:26:42,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:26:42,981 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:26:42,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem11_label50.c [2021-10-15 20:26:43,061 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/data/2c5ebcca7/fc2f715a532647f2b27cb5c9dc0eb69c/FLAGd2df059bb [2021-10-15 20:26:43,786 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:26:43,786 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/sv-benchmarks/c/eca-rers2012/Problem11_label50.c [2021-10-15 20:26:43,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/data/2c5ebcca7/fc2f715a532647f2b27cb5c9dc0eb69c/FLAGd2df059bb [2021-10-15 20:26:43,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/data/2c5ebcca7/fc2f715a532647f2b27cb5c9dc0eb69c [2021-10-15 20:26:43,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:26:43,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:26:43,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:26:43,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:26:43,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:26:43,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:26:43" (1/1) ... [2021-10-15 20:26:43,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21459b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:43, skipping insertion in model container [2021-10-15 20:26:43,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:26:43" (1/1) ... [2021-10-15 20:26:43,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:26:44,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:26:44,311 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_52325231-0c05-4ef9-a7f6-fd5af157e19d/sv-benchmarks/c/eca-rers2012/Problem11_label50.c[5287,5300] [2021-10-15 20:26:44,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:26:44,677 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:26:44,732 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_52325231-0c05-4ef9-a7f6-fd5af157e19d/sv-benchmarks/c/eca-rers2012/Problem11_label50.c[5287,5300] [2021-10-15 20:26:44,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:26:44,941 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:26:44,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44 WrapperNode [2021-10-15 20:26:44,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:26:44,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:26:44,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:26:44,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:26:44,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:44,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:26:45,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:26:45,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:26:45,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:26:45,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:26:45,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:26:45,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:26:45,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:26:45,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (1/1) ... [2021-10-15 20:26:45,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:26:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:45,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:26:45,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:26:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:26:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:26:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:26:45,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:26:47,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:26:47,708 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:26:47,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:26:47 BoogieIcfgContainer [2021-10-15 20:26:47,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:26:47,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:26:47,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:26:47,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:26:47,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:26:43" (1/3) ... [2021-10-15 20:26:47,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664e50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:26:47, skipping insertion in model container [2021-10-15 20:26:47,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:44" (2/3) ... [2021-10-15 20:26:47,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664e50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:26:47, skipping insertion in model container [2021-10-15 20:26:47,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:26:47" (3/3) ... [2021-10-15 20:26:47,724 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2021-10-15 20:26:47,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:26:47,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:26:47,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:26:47,808 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 20:26:47,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:26:47,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 283 places, 482 transitions, 964 flow [2021-10-15 20:26:48,059 INFO L129 PetriNetUnfolder]: 200/482 cut-off events. [2021-10-15 20:26:48,060 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:48,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 482 events. 200/482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 334 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 0. Up to 121 conditions per place. [2021-10-15 20:26:48,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 482 transitions, 964 flow [2021-10-15 20:26:48,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 477 transitions, 954 flow [2021-10-15 20:26:48,103 INFO L129 PetriNetUnfolder]: 31/97 cut-off events. [2021-10-15 20:26:48,103 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:48,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:48,105 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] [2021-10-15 20:26:48,105 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2021-10-15 20:26:48,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:48,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694655150] [2021-10-15 20:26:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:48,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:48,398 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 20:26:48,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:48,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694655150] [2021-10-15 20:26:48,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694655150] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:48,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:48,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:26:48,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772210105] [2021-10-15 20:26:48,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:48,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:48,437 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:26:48,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 477 transitions, 954 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 20:26:48,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:48,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:26:48,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:50,077 INFO L129 PetriNetUnfolder]: 190/678 cut-off events. [2021-10-15 20:26:50,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:50,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 678 events. 190/678 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 840 event pairs, 0 based on Foata normal form. 77/497 useless extension candidates. Maximal degree in co-relation 2. Up to 418 conditions per place. [2021-10-15 20:26:50,087 INFO L132 encePairwiseOnDemand]: 259/482 looper letters, 517 selfloop transitions, 50 changer transitions 76/670 dead transitions. [2021-10-15 20:26:50,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 670 transitions, 2626 flow [2021-10-15 20:26:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 928 transitions. [2021-10-15 20:26:50,109 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417704011065007 [2021-10-15 20:26:50,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 928 transitions. [2021-10-15 20:26:50,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 928 transitions. [2021-10-15 20:26:50,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:50,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 928 transitions. [2021-10-15 20:26:50,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 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 20:26:50,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:50,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:50,143 INFO L186 Difference]: Start difference. First operand has 280 places, 477 transitions, 954 flow. Second operand 3 states and 928 transitions. [2021-10-15 20:26:50,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 670 transitions, 2626 flow [2021-10-15 20:26:50,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 670 transitions, 2626 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:26:50,176 INFO L242 Difference]: Finished difference. Result has 284 places, 397 transitions, 1212 flow [2021-10-15 20:26:50,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1212, PETRI_PLACES=284, PETRI_TRANSITIONS=397} [2021-10-15 20:26:50,180 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, 4 predicate places. [2021-10-15 20:26:50,180 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 397 transitions, 1212 flow [2021-10-15 20:26:50,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 20:26:50,181 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:50,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:50,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:26:50,183 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:50,184 INFO L82 PathProgramCache]: Analyzing trace with hash -464053414, now seen corresponding path program 1 times [2021-10-15 20:26:50,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:50,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911934018] [2021-10-15 20:26:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:50,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:50,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:50,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911934018] [2021-10-15 20:26:50,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911934018] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:50,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:50,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:26:50,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130381591] [2021-10-15 20:26:50,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:50,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:50,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 20:26:50,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 397 transitions, 1212 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 20:26:50,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:50,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 20:26:50,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:51,805 INFO L129 PetriNetUnfolder]: 320/1123 cut-off events. [2021-10-15 20:26:51,806 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2021-10-15 20:26:51,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1123 events. 320/1123 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2446 event pairs, 0 based on Foata normal form. 52/1094 useless extension candidates. Maximal degree in co-relation 816. Up to 543 conditions per place. [2021-10-15 20:26:51,820 INFO L132 encePairwiseOnDemand]: 344/482 looper letters, 528 selfloop transitions, 156 changer transitions 0/706 dead transitions. [2021-10-15 20:26:51,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 706 transitions, 3468 flow [2021-10-15 20:26:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 20:26:51,826 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5055325034578146 [2021-10-15 20:26:51,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 20:26:51,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 20:26:51,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:51,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 20:26:51,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 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 20:26:51,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:51,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:51,842 INFO L186 Difference]: Start difference. First operand has 284 places, 397 transitions, 1212 flow. Second operand 3 states and 731 transitions. [2021-10-15 20:26:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 706 transitions, 3468 flow [2021-10-15 20:26:51,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 706 transitions, 3304 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:51,897 INFO L242 Difference]: Finished difference. Result has 226 places, 515 transitions, 2450 flow [2021-10-15 20:26:51,898 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2450, PETRI_PLACES=226, PETRI_TRANSITIONS=515} [2021-10-15 20:26:51,906 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -54 predicate places. [2021-10-15 20:26:51,906 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 515 transitions, 2450 flow [2021-10-15 20:26:51,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 20:26:51,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:51,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:51,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:26:51,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1589161308, now seen corresponding path program 1 times [2021-10-15 20:26:51,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:51,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344329615] [2021-10-15 20:26:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:51,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:52,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:52,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344329615] [2021-10-15 20:26:52,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344329615] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:52,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:52,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:26:52,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373505914] [2021-10-15 20:26:52,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:52,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:52,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 482 [2021-10-15 20:26:52,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 515 transitions, 2450 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 20:26:52,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:52,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 482 [2021-10-15 20:26:52,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:53,688 INFO L129 PetriNetUnfolder]: 340/1514 cut-off events. [2021-10-15 20:26:53,688 INFO L130 PetriNetUnfolder]: For 652/652 co-relation queries the response was YES. [2021-10-15 20:26:53,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3785 conditions, 1514 events. 340/1514 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3626 event pairs, 0 based on Foata normal form. 58/1539 useless extension candidates. Maximal degree in co-relation 1135. Up to 1092 conditions per place. [2021-10-15 20:26:53,700 INFO L132 encePairwiseOnDemand]: 432/482 looper letters, 669 selfloop transitions, 25 changer transitions 0/717 dead transitions. [2021-10-15 20:26:53,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 717 transitions, 4340 flow [2021-10-15 20:26:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2021-10-15 20:26:53,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44398340248962653 [2021-10-15 20:26:53,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2021-10-15 20:26:53,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2021-10-15 20:26:53,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:53,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2021-10-15 20:26:53,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 20:26:53,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:53,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:53,714 INFO L186 Difference]: Start difference. First operand has 226 places, 515 transitions, 2450 flow. Second operand 3 states and 642 transitions. [2021-10-15 20:26:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 717 transitions, 4340 flow [2021-10-15 20:26:53,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 717 transitions, 4006 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:53,756 INFO L242 Difference]: Finished difference. Result has 227 places, 533 transitions, 2477 flow [2021-10-15 20:26:53,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2477, PETRI_PLACES=227, PETRI_TRANSITIONS=533} [2021-10-15 20:26:53,758 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -53 predicate places. [2021-10-15 20:26:53,758 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 533 transitions, 2477 flow [2021-10-15 20:26:53,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 20:26:53,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:53,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:53,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:26:53,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash 649803806, now seen corresponding path program 1 times [2021-10-15 20:26:53,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:53,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190145757] [2021-10-15 20:26:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:53,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:53,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:53,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190145757] [2021-10-15 20:26:53,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190145757] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:53,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:53,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:53,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801038499] [2021-10-15 20:26:53,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:53,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:53,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 20:26:53,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 533 transitions, 2477 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 20:26:53,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:53,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 20:26:53,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:55,722 INFO L129 PetriNetUnfolder]: 435/2176 cut-off events. [2021-10-15 20:26:55,723 INFO L130 PetriNetUnfolder]: For 724/724 co-relation queries the response was YES. [2021-10-15 20:26:55,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5285 conditions, 2176 events. 435/2176 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6891 event pairs, 0 based on Foata normal form. 97/2239 useless extension candidates. Maximal degree in co-relation 3222. Up to 1471 conditions per place. [2021-10-15 20:26:55,740 INFO L132 encePairwiseOnDemand]: 348/482 looper letters, 652 selfloop transitions, 135 changer transitions 0/809 dead transitions. [2021-10-15 20:26:55,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 809 transitions, 5008 flow [2021-10-15 20:26:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2021-10-15 20:26:55,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5013831258644537 [2021-10-15 20:26:55,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2021-10-15 20:26:55,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2021-10-15 20:26:55,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:55,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2021-10-15 20:26:55,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 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 20:26:55,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:55,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:55,756 INFO L186 Difference]: Start difference. First operand has 227 places, 533 transitions, 2477 flow. Second operand 3 states and 725 transitions. [2021-10-15 20:26:55,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 809 transitions, 5008 flow [2021-10-15 20:26:55,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 809 transitions, 4976 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:26:55,799 INFO L242 Difference]: Finished difference. Result has 230 places, 621 transitions, 3884 flow [2021-10-15 20:26:55,800 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3884, PETRI_PLACES=230, PETRI_TRANSITIONS=621} [2021-10-15 20:26:55,800 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -50 predicate places. [2021-10-15 20:26:55,801 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 621 transitions, 3884 flow [2021-10-15 20:26:55,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 20:26:55,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:55,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:55,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:26:55,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1095020807, now seen corresponding path program 1 times [2021-10-15 20:26:55,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:55,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826933520] [2021-10-15 20:26:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:55,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:55,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:55,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826933520] [2021-10-15 20:26:55,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826933520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:55,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:55,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:26:55,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367594098] [2021-10-15 20:26:55,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:55,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:55,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 482 [2021-10-15 20:26:55,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 621 transitions, 3884 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 20:26:55,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:55,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 482 [2021-10-15 20:26:55,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:58,201 INFO L129 PetriNetUnfolder]: 572/3417 cut-off events. [2021-10-15 20:26:58,202 INFO L130 PetriNetUnfolder]: For 3023/3023 co-relation queries the response was YES. [2021-10-15 20:26:58,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8596 conditions, 3417 events. 572/3417 cut-off events. For 3023/3023 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14061 event pairs, 0 based on Foata normal form. 225/3620 useless extension candidates. Maximal degree in co-relation 2377. Up to 2102 conditions per place. [2021-10-15 20:26:58,229 INFO L132 encePairwiseOnDemand]: 340/482 looper letters, 565 selfloop transitions, 317 changer transitions 0/928 dead transitions. [2021-10-15 20:26:58,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 928 transitions, 7084 flow [2021-10-15 20:26:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 20:26:58,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5055325034578146 [2021-10-15 20:26:58,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 20:26:58,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 20:26:58,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:58,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 20:26:58,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 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 20:26:58,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:58,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:26:58,244 INFO L186 Difference]: Start difference. First operand has 230 places, 621 transitions, 3884 flow. Second operand 3 states and 731 transitions. [2021-10-15 20:26:58,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 928 transitions, 7084 flow [2021-10-15 20:26:58,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 928 transitions, 6610 flow, removed 61 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:58,312 INFO L242 Difference]: Finished difference. Result has 232 places, 747 transitions, 6118 flow [2021-10-15 20:26:58,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6118, PETRI_PLACES=232, PETRI_TRANSITIONS=747} [2021-10-15 20:26:58,314 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -48 predicate places. [2021-10-15 20:26:58,314 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 747 transitions, 6118 flow [2021-10-15 20:26:58,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 20:26:58,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:58,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:58,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:26:58,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:58,316 INFO L82 PathProgramCache]: Analyzing trace with hash 653368921, now seen corresponding path program 1 times [2021-10-15 20:26:58,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:58,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079450624] [2021-10-15 20:26:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:58,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:58,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:58,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079450624] [2021-10-15 20:26:58,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079450624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:58,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:58,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:58,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430697081] [2021-10-15 20:26:58,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:58,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:58,522 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 20:26:58,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 747 transitions, 6118 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 20:26:58,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:58,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 20:26:58,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:01,363 INFO L129 PetriNetUnfolder]: 684/4275 cut-off events. [2021-10-15 20:27:01,363 INFO L130 PetriNetUnfolder]: For 4979/4979 co-relation queries the response was YES. [2021-10-15 20:27:01,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11428 conditions, 4275 events. 684/4275 cut-off events. For 4979/4979 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 20296 event pairs, 0 based on Foata normal form. 56/4321 useless extension candidates. Maximal degree in co-relation 3403. Up to 3263 conditions per place. [2021-10-15 20:27:01,391 INFO L132 encePairwiseOnDemand]: 378/482 looper letters, 800 selfloop transitions, 219 changer transitions 0/1041 dead transitions. [2021-10-15 20:27:01,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1041 transitions, 9574 flow [2021-10-15 20:27:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2021-10-15 20:27:01,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4730290456431535 [2021-10-15 20:27:01,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2021-10-15 20:27:01,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2021-10-15 20:27:01,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:01,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2021-10-15 20:27:01,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 20:27:01,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:01,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:01,407 INFO L186 Difference]: Start difference. First operand has 232 places, 747 transitions, 6118 flow. Second operand 3 states and 684 transitions. [2021-10-15 20:27:01,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1041 transitions, 9574 flow [2021-10-15 20:27:01,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1041 transitions, 8586 flow, removed 111 selfloop flow, removed 2 redundant places. [2021-10-15 20:27:01,487 INFO L242 Difference]: Finished difference. Result has 234 places, 850 transitions, 7276 flow [2021-10-15 20:27:01,489 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7276, PETRI_PLACES=234, PETRI_TRANSITIONS=850} [2021-10-15 20:27:01,489 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -46 predicate places. [2021-10-15 20:27:01,489 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 850 transitions, 7276 flow [2021-10-15 20:27:01,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 20:27:01,490 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:01,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:27:01,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:01,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1472633207, now seen corresponding path program 1 times [2021-10-15 20:27:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:01,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418557425] [2021-10-15 20:27:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:01,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-15 20:27:01,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:01,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418557425] [2021-10-15 20:27:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418557425] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:01,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:01,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:27:01,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803001010] [2021-10-15 20:27:01,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:01,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:27:01,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 20:27:01,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 850 transitions, 7276 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 20:27:01,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:01,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 20:27:01,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:04,718 INFO L129 PetriNetUnfolder]: 812/5149 cut-off events. [2021-10-15 20:27:04,718 INFO L130 PetriNetUnfolder]: For 6004/6004 co-relation queries the response was YES. [2021-10-15 20:27:04,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 5149 events. 812/5149 cut-off events. For 6004/6004 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27520 event pairs, 0 based on Foata normal form. 4/5153 useless extension candidates. Maximal degree in co-relation 9241. Up to 3566 conditions per place. [2021-10-15 20:27:04,745 INFO L132 encePairwiseOnDemand]: 437/482 looper letters, 979 selfloop transitions, 135 changer transitions 0/1160 dead transitions. [2021-10-15 20:27:04,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1160 transitions, 11234 flow [2021-10-15 20:27:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2021-10-15 20:27:04,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4557399723374827 [2021-10-15 20:27:04,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2021-10-15 20:27:04,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2021-10-15 20:27:04,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:04,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2021-10-15 20:27:04,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 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 20:27:04,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:04,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:04,762 INFO L186 Difference]: Start difference. First operand has 234 places, 850 transitions, 7276 flow. Second operand 3 states and 659 transitions. [2021-10-15 20:27:04,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1160 transitions, 11234 flow [2021-10-15 20:27:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1160 transitions, 10700 flow, removed 7 selfloop flow, removed 2 redundant places. [2021-10-15 20:27:04,846 INFO L242 Difference]: Finished difference. Result has 235 places, 901 transitions, 7859 flow [2021-10-15 20:27:04,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7859, PETRI_PLACES=235, PETRI_TRANSITIONS=901} [2021-10-15 20:27:04,848 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -45 predicate places. [2021-10-15 20:27:04,848 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 901 transitions, 7859 flow [2021-10-15 20:27:04,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 20:27:04,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:04,849 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:04,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:27:04,850 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -760864207, now seen corresponding path program 1 times [2021-10-15 20:27:04,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:04,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835310438] [2021-10-15 20:27:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:04,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-15 20:27:04,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:04,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835310438] [2021-10-15 20:27:04,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835310438] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:04,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:04,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:27:04,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886193730] [2021-10-15 20:27:04,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:04,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:27:04,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 20:27:04,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 901 transitions, 7859 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 20:27:04,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:04,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 20:27:04,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:08,569 INFO L129 PetriNetUnfolder]: 892/5971 cut-off events. [2021-10-15 20:27:08,570 INFO L130 PetriNetUnfolder]: For 7889/7889 co-relation queries the response was YES. [2021-10-15 20:27:08,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15790 conditions, 5971 events. 892/5971 cut-off events. For 7889/7889 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 35227 event pairs, 0 based on Foata normal form. 152/6118 useless extension candidates. Maximal degree in co-relation 7351. Up to 4791 conditions per place. [2021-10-15 20:27:08,597 INFO L132 encePairwiseOnDemand]: 354/482 looper letters, 936 selfloop transitions, 200 changer transitions 0/1158 dead transitions. [2021-10-15 20:27:08,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1158 transitions, 11295 flow [2021-10-15 20:27:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-10-15 20:27:08,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4972337482710927 [2021-10-15 20:27:08,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-10-15 20:27:08,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-10-15 20:27:08,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:08,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-10-15 20:27:08,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 20:27:08,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:08,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:08,609 INFO L186 Difference]: Start difference. First operand has 235 places, 901 transitions, 7859 flow. Second operand 3 states and 719 transitions. [2021-10-15 20:27:08,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1158 transitions, 11295 flow [2021-10-15 20:27:08,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1158 transitions, 11144 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:27:08,668 INFO L242 Difference]: Finished difference. Result has 238 places, 971 transitions, 9654 flow [2021-10-15 20:27:08,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=7448, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9654, PETRI_PLACES=238, PETRI_TRANSITIONS=971} [2021-10-15 20:27:08,670 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -42 predicate places. [2021-10-15 20:27:08,670 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 971 transitions, 9654 flow [2021-10-15 20:27:08,670 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 20:27:08,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:08,671 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 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 20:27:08,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:27:08,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 43300159, now seen corresponding path program 1 times [2021-10-15 20:27:08,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:08,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902264789] [2021-10-15 20:27:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:08,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:08,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:08,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902264789] [2021-10-15 20:27:08,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902264789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:08,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:08,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:27:08,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611081190] [2021-10-15 20:27:08,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:27:08,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:27:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:27:08,814 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:27:08,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 971 transitions, 9654 flow. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 20:27:08,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:08,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:27:08,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:16,077 INFO L129 PetriNetUnfolder]: 1560/11851 cut-off events. [2021-10-15 20:27:16,077 INFO L130 PetriNetUnfolder]: For 19698/19698 co-relation queries the response was YES. [2021-10-15 20:27:16,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31372 conditions, 11851 events. 1560/11851 cut-off events. For 19698/19698 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 83279 event pairs, 0 based on Foata normal form. 373/12213 useless extension candidates. Maximal degree in co-relation 23676. Up to 4528 conditions per place. [2021-10-15 20:27:16,133 INFO L132 encePairwiseOnDemand]: 352/482 looper letters, 1144 selfloop transitions, 710 changer transitions 0/1892 dead transitions. [2021-10-15 20:27:16,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1892 transitions, 20776 flow [2021-10-15 20:27:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:27:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:27:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1057 transitions. [2021-10-15 20:27:16,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5482365145228216 [2021-10-15 20:27:16,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1057 transitions. [2021-10-15 20:27:16,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1057 transitions. [2021-10-15 20:27:16,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:16,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1057 transitions. [2021-10-15 20:27:16,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 264.25) internal successors, (1057), 4 states have internal predecessors, (1057), 0 states have call successors, (0), 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 20:27:16,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:27:16,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:27:16,152 INFO L186 Difference]: Start difference. First operand has 238 places, 971 transitions, 9654 flow. Second operand 4 states and 1057 transitions. [2021-10-15 20:27:16,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1892 transitions, 20776 flow [2021-10-15 20:27:16,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1892 transitions, 20078 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:27:16,382 INFO L242 Difference]: Finished difference. Result has 242 places, 1471 transitions, 19104 flow [2021-10-15 20:27:16,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=9254, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=19104, PETRI_PLACES=242, PETRI_TRANSITIONS=1471} [2021-10-15 20:27:16,384 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -38 predicate places. [2021-10-15 20:27:16,384 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 1471 transitions, 19104 flow [2021-10-15 20:27:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 20:27:16,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:16,385 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:16,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:27:16,386 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1310756102, now seen corresponding path program 1 times [2021-10-15 20:27:16,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:16,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855138373] [2021-10-15 20:27:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:16,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:16,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:16,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855138373] [2021-10-15 20:27:16,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855138373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:16,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:16,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:27:16,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159211288] [2021-10-15 20:27:16,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:27:16,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:27:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:27:16,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:27:16,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1471 transitions, 19104 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 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 20:27:16,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:16,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:27:16,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:31,881 INFO L129 PetriNetUnfolder]: 2184/16548 cut-off events. [2021-10-15 20:27:31,881 INFO L130 PetriNetUnfolder]: For 40421/40421 co-relation queries the response was YES. [2021-10-15 20:27:31,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46663 conditions, 16548 events. 2184/16548 cut-off events. For 40421/40421 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 125470 event pairs, 0 based on Foata normal form. 249/16788 useless extension candidates. Maximal degree in co-relation 25675. Up to 7857 conditions per place. [2021-10-15 20:27:31,974 INFO L132 encePairwiseOnDemand]: 343/482 looper letters, 1373 selfloop transitions, 970 changer transitions 0/2381 dead transitions. [2021-10-15 20:27:31,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 2381 transitions, 32348 flow [2021-10-15 20:27:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:27:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:27:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1043 transitions. [2021-10-15 20:27:31,981 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5409751037344398 [2021-10-15 20:27:31,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1043 transitions. [2021-10-15 20:27:31,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1043 transitions. [2021-10-15 20:27:31,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:31,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1043 transitions. [2021-10-15 20:27:31,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 260.75) internal successors, (1043), 4 states have internal predecessors, (1043), 0 states have call successors, (0), 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 20:27:31,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:27:31,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:27:31,995 INFO L186 Difference]: Start difference. First operand has 242 places, 1471 transitions, 19104 flow. Second operand 4 states and 1043 transitions. [2021-10-15 20:27:31,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 2381 transitions, 32348 flow [2021-10-15 20:27:32,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 2381 transitions, 32348 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:27:32,315 INFO L242 Difference]: Finished difference. Result has 248 places, 1959 transitions, 31310 flow [2021-10-15 20:27:32,318 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=19104, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31310, PETRI_PLACES=248, PETRI_TRANSITIONS=1959} [2021-10-15 20:27:32,318 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -32 predicate places. [2021-10-15 20:27:32,318 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 1959 transitions, 31310 flow [2021-10-15 20:27:32,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 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 20:27:32,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:32,320 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:32,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:27:32,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash -499731777, now seen corresponding path program 1 times [2021-10-15 20:27:32,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:32,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611200262] [2021-10-15 20:27:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:32,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:32,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:32,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611200262] [2021-10-15 20:27:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611200262] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:32,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:32,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:27:32,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248424247] [2021-10-15 20:27:32,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:32,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:27:32,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 482 [2021-10-15 20:27:32,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 1959 transitions, 31310 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 20:27:32,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:32,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 482 [2021-10-15 20:27:32,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:51,625 INFO L129 PetriNetUnfolder]: 1842/16196 cut-off events. [2021-10-15 20:27:51,625 INFO L130 PetriNetUnfolder]: For 55532/55532 co-relation queries the response was YES. [2021-10-15 20:27:51,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46516 conditions, 16196 events. 1842/16196 cut-off events. For 55532/55532 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 124811 event pairs, 0 based on Foata normal form. 342/16529 useless extension candidates. Maximal degree in co-relation 23569. Up to 10588 conditions per place. [2021-10-15 20:27:51,712 INFO L132 encePairwiseOnDemand]: 369/482 looper letters, 1068 selfloop transitions, 687 changer transitions 0/1831 dead transitions. [2021-10-15 20:27:51,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1831 transitions, 29984 flow [2021-10-15 20:27:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2021-10-15 20:27:51,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45504840940525587 [2021-10-15 20:27:51,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2021-10-15 20:27:51,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2021-10-15 20:27:51,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:51,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2021-10-15 20:27:51,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 20:27:51,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:51,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:27:51,725 INFO L186 Difference]: Start difference. First operand has 248 places, 1959 transitions, 31310 flow. Second operand 3 states and 658 transitions. [2021-10-15 20:27:51,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1831 transitions, 29984 flow [2021-10-15 20:27:51,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1831 transitions, 29984 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:27:52,004 INFO L242 Difference]: Finished difference. Result has 250 places, 1650 transitions, 27486 flow [2021-10-15 20:27:52,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=26112, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=687, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27486, PETRI_PLACES=250, PETRI_TRANSITIONS=1650} [2021-10-15 20:27:52,007 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -30 predicate places. [2021-10-15 20:27:52,007 INFO L470 AbstractCegarLoop]: Abstraction has has 250 places, 1650 transitions, 27486 flow [2021-10-15 20:27:52,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 20:27:52,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:52,008 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:52,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:27:52,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:52,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1714177798, now seen corresponding path program 1 times [2021-10-15 20:27:52,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:52,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914420148] [2021-10-15 20:27:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:52,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 39 proven. 28 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-15 20:27:52,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:52,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914420148] [2021-10-15 20:27:52,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914420148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:52,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477148750] [2021-10-15 20:27:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:52,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:52,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:52,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:27:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:27:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-15 20:27:53,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477148750] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:53,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:53,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:27:53,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620487918] [2021-10-15 20:27:53,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:53,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:53,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:27:53,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 20:27:53,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1650 transitions, 27486 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 20:27:53,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:53,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 20:27:53,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:28:17,557 INFO L129 PetriNetUnfolder]: 2017/20046 cut-off events. [2021-10-15 20:28:17,557 INFO L130 PetriNetUnfolder]: For 67778/67778 co-relation queries the response was YES. [2021-10-15 20:28:17,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56424 conditions, 20046 events. 2017/20046 cut-off events. For 67778/67778 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 159092 event pairs, 0 based on Foata normal form. 285/20331 useless extension candidates. Maximal degree in co-relation 31507. Up to 15049 conditions per place. [2021-10-15 20:28:17,656 INFO L132 encePairwiseOnDemand]: 351/482 looper letters, 1536 selfloop transitions, 405 changer transitions 0/1996 dead transitions. [2021-10-15 20:28:17,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1996 transitions, 34952 flow [2021-10-15 20:28:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:28:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:28:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2021-10-15 20:28:17,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5020746887966805 [2021-10-15 20:28:17,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2021-10-15 20:28:17,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2021-10-15 20:28:17,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:28:17,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2021-10-15 20:28:17,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 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 20:28:17,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:28:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:28:17,671 INFO L186 Difference]: Start difference. First operand has 250 places, 1650 transitions, 27486 flow. Second operand 3 states and 726 transitions. [2021-10-15 20:28:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1996 transitions, 34952 flow [2021-10-15 20:28:17,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1996 transitions, 34181 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:28:17,979 INFO L242 Difference]: Finished difference. Result has 253 places, 1804 transitions, 32154 flow [2021-10-15 20:28:17,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=25828, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32154, PETRI_PLACES=253, PETRI_TRANSITIONS=1804} [2021-10-15 20:28:17,982 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -27 predicate places. [2021-10-15 20:28:17,982 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 1804 transitions, 32154 flow [2021-10-15 20:28:17,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 20:28:17,983 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:28:17,983 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 20:28:18,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:28:18,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:28:18,198 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:28:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:28:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash 360106579, now seen corresponding path program 1 times [2021-10-15 20:28:18,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:28:18,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230625461] [2021-10-15 20:28:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:28:18,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:28:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:28:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-15 20:28:18,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:28:18,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230625461] [2021-10-15 20:28:18,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230625461] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:28:18,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:28:18,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:28:18,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179584149] [2021-10-15 20:28:18,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:28:18,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:28:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:28:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:28:18,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 20:28:18,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1804 transitions, 32154 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 20:28:18,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:28:18,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 20:28:18,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:28:42,703 INFO L129 PetriNetUnfolder]: 1710/19352 cut-off events. [2021-10-15 20:28:42,703 INFO L130 PetriNetUnfolder]: For 69440/69440 co-relation queries the response was YES. [2021-10-15 20:28:42,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53152 conditions, 19352 events. 1710/19352 cut-off events. For 69440/69440 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 153900 event pairs, 0 based on Foata normal form. 261/19606 useless extension candidates. Maximal degree in co-relation 37622. Up to 15478 conditions per place. [2021-10-15 20:28:42,788 INFO L132 encePairwiseOnDemand]: 357/482 looper letters, 1374 selfloop transitions, 372 changer transitions 0/1768 dead transitions. [2021-10-15 20:28:42,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1768 transitions, 31525 flow [2021-10-15 20:28:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:28:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:28:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2021-10-15 20:28:42,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48686030428769017 [2021-10-15 20:28:42,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2021-10-15 20:28:42,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2021-10-15 20:28:42,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:28:42,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2021-10-15 20:28:42,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:42,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:28:42,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:28:42,802 INFO L186 Difference]: Start difference. First operand has 253 places, 1804 transitions, 32154 flow. Second operand 3 states and 704 transitions. [2021-10-15 20:28:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1768 transitions, 31525 flow [2021-10-15 20:28:43,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1768 transitions, 30833 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:28:43,088 INFO L242 Difference]: Finished difference. Result has 254 places, 1581 transitions, 28031 flow [2021-10-15 20:28:43,090 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=26895, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28031, PETRI_PLACES=254, PETRI_TRANSITIONS=1581} [2021-10-15 20:28:43,090 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -26 predicate places. [2021-10-15 20:28:43,090 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 1581 transitions, 28031 flow [2021-10-15 20:28:43,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 20:28:43,091 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:28:43,091 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:28:43,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:28:43,092 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:28:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:28:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2039816122, now seen corresponding path program 1 times [2021-10-15 20:28:43,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:28:43,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819801207] [2021-10-15 20:28:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:28:43,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:28:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:28:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 123 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:28:43,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:28:43,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819801207] [2021-10-15 20:28:43,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819801207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:28:43,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916402160] [2021-10-15 20:28:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:28:43,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:28:43,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:28:43,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:28:43,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:28:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:28:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:28:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:28:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:28:44,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916402160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:28:44,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:28:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:28:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413632507] [2021-10-15 20:28:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:28:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:28:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:28:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:28:44,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 20:28:44,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 1581 transitions, 28031 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 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 20:28:44,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:28:44,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 20:28:44,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:29:04,632 INFO L129 PetriNetUnfolder]: 1698/19340 cut-off events. [2021-10-15 20:29:04,633 INFO L130 PetriNetUnfolder]: For 62137/62137 co-relation queries the response was YES. [2021-10-15 20:29:04,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53386 conditions, 19340 events. 1698/19340 cut-off events. For 62137/62137 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 153957 event pairs, 0 based on Foata normal form. 12/19345 useless extension candidates. Maximal degree in co-relation 34509. Up to 15331 conditions per place. [2021-10-15 20:29:04,716 INFO L132 encePairwiseOnDemand]: 423/482 looper letters, 1716 selfloop transitions, 371 changer transitions 0/2109 dead transitions. [2021-10-15 20:29:04,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 2109 transitions, 35938 flow [2021-10-15 20:29:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:29:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:29:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2021-10-15 20:29:04,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4512448132780083 [2021-10-15 20:29:04,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2021-10-15 20:29:04,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2021-10-15 20:29:04,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:04,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2021-10-15 20:29:04,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 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 20:29:04,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:29:04,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:29:04,734 INFO L186 Difference]: Start difference. First operand has 254 places, 1581 transitions, 28031 flow. Second operand 4 states and 870 transitions. [2021-10-15 20:29:04,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 2109 transitions, 35938 flow [2021-10-15 20:29:04,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 2109 transitions, 35517 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:29:05,042 INFO L242 Difference]: Finished difference. Result has 258 places, 1626 transitions, 29844 flow [2021-10-15 20:29:05,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=27557, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=29844, PETRI_PLACES=258, PETRI_TRANSITIONS=1626} [2021-10-15 20:29:05,044 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -22 predicate places. [2021-10-15 20:29:05,045 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 1626 transitions, 29844 flow [2021-10-15 20:29:05,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 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 20:29:05,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:29:05,046 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:29:05,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:29:05,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:29:05,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:29:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:29:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1065717957, now seen corresponding path program 1 times [2021-10-15 20:29:05,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:29:05,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346468367] [2021-10-15 20:29:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:29:05,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:29:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:29:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-10-15 20:29:05,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:29:05,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346468367] [2021-10-15 20:29:05,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346468367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:29:05,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:29:05,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:29:05,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221961046] [2021-10-15 20:29:05,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:29:05,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:29:05,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:29:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:29:05,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:29:05,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1626 transitions, 29844 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 20:29:05,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:29:05,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:29:05,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:29:27,558 INFO L129 PetriNetUnfolder]: 1758/20688 cut-off events. [2021-10-15 20:29:27,559 INFO L130 PetriNetUnfolder]: For 72802/72802 co-relation queries the response was YES. [2021-10-15 20:29:27,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56895 conditions, 20688 events. 1758/20688 cut-off events. For 72802/72802 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 170494 event pairs, 0 based on Foata normal form. 97/20778 useless extension candidates. Maximal degree in co-relation 49136. Up to 18950 conditions per place. [2021-10-15 20:29:27,636 INFO L132 encePairwiseOnDemand]: 442/482 looper letters, 1759 selfloop transitions, 61 changer transitions 0/1857 dead transitions. [2021-10-15 20:29:27,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1857 transitions, 34827 flow [2021-10-15 20:29:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:29:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:29:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2021-10-15 20:29:27,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4412171507607192 [2021-10-15 20:29:27,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2021-10-15 20:29:27,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2021-10-15 20:29:27,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:27,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2021-10-15 20:29:27,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 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 20:29:27,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:29:27,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:29:27,649 INFO L186 Difference]: Start difference. First operand has 258 places, 1626 transitions, 29844 flow. Second operand 3 states and 638 transitions. [2021-10-15 20:29:27,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1857 transitions, 34827 flow [2021-10-15 20:29:27,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1857 transitions, 34179 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:29:27,891 INFO L242 Difference]: Finished difference. Result has 259 places, 1653 transitions, 30085 flow [2021-10-15 20:29:27,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=29214, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30085, PETRI_PLACES=259, PETRI_TRANSITIONS=1653} [2021-10-15 20:29:27,893 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -21 predicate places. [2021-10-15 20:29:27,893 INFO L470 AbstractCegarLoop]: Abstraction has has 259 places, 1653 transitions, 30085 flow [2021-10-15 20:29:27,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 20:29:27,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:29:27,894 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, 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, 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] [2021-10-15 20:29:27,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:29:27,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:29:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:29:27,896 INFO L82 PathProgramCache]: Analyzing trace with hash -698824767, now seen corresponding path program 1 times [2021-10-15 20:29:27,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:29:27,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056265553] [2021-10-15 20:29:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:29:27,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:29:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:29:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-15 20:29:28,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:29:28,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056265553] [2021-10-15 20:29:28,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056265553] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:29:28,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:29:28,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:29:28,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403508381] [2021-10-15 20:29:28,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:29:28,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:29:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:29:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:29:28,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 20:29:28,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 1653 transitions, 30085 flow. Second operand has 4 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 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 20:29:28,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:29:28,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 20:29:28,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:29:59,572 INFO L129 PetriNetUnfolder]: 2197/27802 cut-off events. [2021-10-15 20:29:59,572 INFO L130 PetriNetUnfolder]: For 94433/94433 co-relation queries the response was YES. [2021-10-15 20:29:59,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74776 conditions, 27802 events. 2197/27802 cut-off events. For 94433/94433 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 238555 event pairs, 0 based on Foata normal form. 229/28031 useless extension candidates. Maximal degree in co-relation 70202. Up to 13930 conditions per place. [2021-10-15 20:29:59,705 INFO L132 encePairwiseOnDemand]: 362/482 looper letters, 1593 selfloop transitions, 719 changer transitions 76/2441 dead transitions. [2021-10-15 20:29:59,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 2441 transitions, 44126 flow [2021-10-15 20:29:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:29:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:29:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1036 transitions. [2021-10-15 20:29:59,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5373443983402489 [2021-10-15 20:29:59,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1036 transitions. [2021-10-15 20:29:59,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1036 transitions. [2021-10-15 20:29:59,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:59,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1036 transitions. [2021-10-15 20:29:59,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 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 20:29:59,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:29:59,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:29:59,722 INFO L186 Difference]: Start difference. First operand has 259 places, 1653 transitions, 30085 flow. Second operand 4 states and 1036 transitions. [2021-10-15 20:29:59,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 2441 transitions, 44126 flow [2021-10-15 20:29:59,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 2441 transitions, 44012 flow, removed 24 selfloop flow, removed 1 redundant places. [2021-10-15 20:30:00,042 INFO L242 Difference]: Finished difference. Result has 264 places, 1936 transitions, 39565 flow [2021-10-15 20:30:00,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=29621, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=39565, PETRI_PLACES=264, PETRI_TRANSITIONS=1936} [2021-10-15 20:30:00,044 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -16 predicate places. [2021-10-15 20:30:00,045 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 1936 transitions, 39565 flow [2021-10-15 20:30:00,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 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 20:30:00,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:30:00,046 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, 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, 1, 1, 1, 1, 1, 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 20:30:00,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:30:00,046 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:30:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:30:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2127545959, now seen corresponding path program 1 times [2021-10-15 20:30:00,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:30:00,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447450781] [2021-10-15 20:30:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:30:00,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:30:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:30:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-15 20:30:00,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:30:00,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447450781] [2021-10-15 20:30:00,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447450781] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:30:00,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:30:00,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:30:00,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241589148] [2021-10-15 20:30:00,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:30:00,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:30:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:30:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:30:00,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:30:00,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 1936 transitions, 39565 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 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 20:30:00,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:30:00,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:30:00,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:30:55,982 INFO L129 PetriNetUnfolder]: 2928/39259 cut-off events. [2021-10-15 20:30:55,982 INFO L130 PetriNetUnfolder]: For 152520/152520 co-relation queries the response was YES. [2021-10-15 20:30:56,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107007 conditions, 39259 events. 2928/39259 cut-off events. For 152520/152520 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 359848 event pairs, 0 based on Foata normal form. 163/39420 useless extension candidates. Maximal degree in co-relation 93875. Up to 21613 conditions per place. [2021-10-15 20:30:56,175 INFO L132 encePairwiseOnDemand]: 349/482 looper letters, 1859 selfloop transitions, 1063 changer transitions 12/2974 dead transitions. [2021-10-15 20:30:56,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 2974 transitions, 61512 flow [2021-10-15 20:30:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:30:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:30:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1035 transitions. [2021-10-15 20:30:56,179 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5368257261410788 [2021-10-15 20:30:56,179 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1035 transitions. [2021-10-15 20:30:56,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1035 transitions. [2021-10-15 20:30:56,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:30:56,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1035 transitions. [2021-10-15 20:30:56,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.75) internal successors, (1035), 4 states have internal predecessors, (1035), 0 states have call successors, (0), 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 20:30:56,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:30:56,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:30:56,190 INFO L186 Difference]: Start difference. First operand has 264 places, 1936 transitions, 39565 flow. Second operand 4 states and 1035 transitions. [2021-10-15 20:30:56,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 2974 transitions, 61512 flow [2021-10-15 20:30:56,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 2974 transitions, 61490 flow, removed 11 selfloop flow, removed 0 redundant places. [2021-10-15 20:30:56,697 INFO L242 Difference]: Finished difference. Result has 270 places, 2498 transitions, 58154 flow [2021-10-15 20:30:56,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=39551, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58154, PETRI_PLACES=270, PETRI_TRANSITIONS=2498} [2021-10-15 20:30:56,700 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -10 predicate places. [2021-10-15 20:30:56,700 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 2498 transitions, 58154 flow [2021-10-15 20:30:56,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 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 20:30:56,701 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:30:56,701 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, 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, 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] [2021-10-15 20:30:56,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:30:56,701 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:30:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:30:56,702 INFO L82 PathProgramCache]: Analyzing trace with hash -409863096, now seen corresponding path program 1 times [2021-10-15 20:30:56,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:30:56,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671797363] [2021-10-15 20:30:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:30:56,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:30:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:30:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-10-15 20:30:56,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:30:56,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671797363] [2021-10-15 20:30:56,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671797363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:30:56,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:30:56,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:30:56,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458246785] [2021-10-15 20:30:56,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:30:56,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:30:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:30:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:30:56,855 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 20:30:56,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 2498 transitions, 58154 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 20:30:56,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:30:56,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 20:30:56,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:32:16,379 INFO L129 PetriNetUnfolder]: 3191/42097 cut-off events. [2021-10-15 20:32:16,379 INFO L130 PetriNetUnfolder]: For 194152/194152 co-relation queries the response was YES. [2021-10-15 20:32:16,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118668 conditions, 42097 events. 3191/42097 cut-off events. For 194152/194152 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 394506 event pairs, 0 based on Foata normal form. 7/42104 useless extension candidates. Maximal degree in co-relation 102866. Up to 29813 conditions per place. [2021-10-15 20:32:16,617 INFO L132 encePairwiseOnDemand]: 404/482 looper letters, 1653 selfloop transitions, 1227 changer transitions 1/2936 dead transitions. [2021-10-15 20:32:16,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 2936 transitions, 70551 flow [2021-10-15 20:32:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:32:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:32:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2021-10-15 20:32:16,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44951590594744123 [2021-10-15 20:32:16,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2021-10-15 20:32:16,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2021-10-15 20:32:16,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:32:16,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2021-10-15 20:32:16,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 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 20:32:16,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:32:16,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:32:16,630 INFO L186 Difference]: Start difference. First operand has 270 places, 2498 transitions, 58154 flow. Second operand 3 states and 650 transitions. [2021-10-15 20:32:16,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 2936 transitions, 70551 flow [2021-10-15 20:32:17,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 2936 transitions, 70551 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:32:17,474 INFO L242 Difference]: Finished difference. Result has 274 places, 2742 transitions, 69543 flow [2021-10-15 20:32:17,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=58066, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69543, PETRI_PLACES=274, PETRI_TRANSITIONS=2742} [2021-10-15 20:32:17,478 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -6 predicate places. [2021-10-15 20:32:17,478 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 2742 transitions, 69543 flow [2021-10-15 20:32:17,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 20:32:17,479 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:32:17,480 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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] [2021-10-15 20:32:17,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:32:17,481 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:32:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:32:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash -359061517, now seen corresponding path program 1 times [2021-10-15 20:32:17,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:32:17,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639362678] [2021-10-15 20:32:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:32:17,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:32:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:32:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-15 20:32:17,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:32:17,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639362678] [2021-10-15 20:32:17,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639362678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:32:17,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:32:17,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:32:17,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359200142] [2021-10-15 20:32:17,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:32:17,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:32:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:32:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:32:17,656 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:32:17,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 2742 transitions, 69543 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 20:32:17,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:32:17,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:32:17,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:34:01,117 INFO L129 PetriNetUnfolder]: 3435/45669 cut-off events. [2021-10-15 20:34:01,117 INFO L130 PetriNetUnfolder]: For 249026/249026 co-relation queries the response was YES. [2021-10-15 20:34:01,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131487 conditions, 45669 events. 3435/45669 cut-off events. For 249026/249026 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 440996 event pairs, 0 based on Foata normal form. 43/45710 useless extension candidates. Maximal degree in co-relation 112721. Up to 26277 conditions per place. [2021-10-15 20:34:01,554 INFO L132 encePairwiseOnDemand]: 380/482 looper letters, 1797 selfloop transitions, 1319 changer transitions 0/3156 dead transitions. [2021-10-15 20:34:01,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 3156 transitions, 81809 flow [2021-10-15 20:34:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:34:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:34:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2021-10-15 20:34:01,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47441217150760717 [2021-10-15 20:34:01,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2021-10-15 20:34:01,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2021-10-15 20:34:01,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:34:01,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2021-10-15 20:34:01,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 20:34:01,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:34:01,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 20:34:01,564 INFO L186 Difference]: Start difference. First operand has 274 places, 2742 transitions, 69543 flow. Second operand 3 states and 686 transitions. [2021-10-15 20:34:01,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 3156 transitions, 81809 flow [2021-10-15 20:34:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 3156 transitions, 79035 flow, removed 47 selfloop flow, removed 2 redundant places. [2021-10-15 20:34:02,537 INFO L242 Difference]: Finished difference. Result has 276 places, 2937 transitions, 77287 flow [2021-10-15 20:34:02,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=66791, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77287, PETRI_PLACES=276, PETRI_TRANSITIONS=2937} [2021-10-15 20:34:02,541 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -4 predicate places. [2021-10-15 20:34:02,541 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 2937 transitions, 77287 flow [2021-10-15 20:34:02,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 20:34:02,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:34:02,542 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, 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, 1, 1, 1, 1, 1, 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 20:34:02,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 20:34:02,542 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:34:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:34:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -108272370, now seen corresponding path program 1 times [2021-10-15 20:34:02,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:34:02,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093030036] [2021-10-15 20:34:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:34:02,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:34:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:34:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-15 20:34:02,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:34:02,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093030036] [2021-10-15 20:34:02,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093030036] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:34:02,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:34:02,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:34:02,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856523923] [2021-10-15 20:34:02,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:34:02,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:34:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:34:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:34:02,741 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 20:34:02,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 2937 transitions, 77287 flow. Second operand has 4 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 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 20:34:02,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:34:02,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 20:34:02,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:36:06,657 INFO L129 PetriNetUnfolder]: 3548/49838 cut-off events. [2021-10-15 20:36:06,657 INFO L130 PetriNetUnfolder]: For 282410/282410 co-relation queries the response was YES. [2021-10-15 20:36:06,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142912 conditions, 49838 events. 3548/49838 cut-off events. For 282410/282410 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 479890 event pairs, 0 based on Foata normal form. 55/49893 useless extension candidates. Maximal degree in co-relation 123307. Up to 34166 conditions per place. [2021-10-15 20:36:06,883 INFO L132 encePairwiseOnDemand]: 400/482 looper letters, 0 selfloop transitions, 0 changer transitions 3241/3241 dead transitions. [2021-10-15 20:36:06,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 3241 transitions, 87749 flow [2021-10-15 20:36:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:36:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:36:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 705 transitions. [2021-10-15 20:36:06,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36566390041493774 [2021-10-15 20:36:06,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 705 transitions. [2021-10-15 20:36:06,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 705 transitions. [2021-10-15 20:36:06,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:36:06,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 705 transitions. [2021-10-15 20:36:06,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 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 20:36:06,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:36:06,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 20:36:06,897 INFO L186 Difference]: Start difference. First operand has 276 places, 2937 transitions, 77287 flow. Second operand 4 states and 705 transitions. [2021-10-15 20:36:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 3241 transitions, 87749 flow [2021-10-15 20:36:07,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 3241 transitions, 84875 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 20:36:07,758 INFO L242 Difference]: Finished difference. Result has 271 places, 0 transitions, 0 flow [2021-10-15 20:36:07,761 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=70879, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=271, PETRI_TRANSITIONS=0} [2021-10-15 20:36:07,761 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -9 predicate places. [2021-10-15 20:36:07,761 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 0 transitions, 0 flow [2021-10-15 20:36:07,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 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 20:36:07,764 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:36:07,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 20:36:07,771 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:36:07,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:36:07 BoogieIcfgContainer [2021-10-15 20:36:07,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:36:07,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:36:07,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:36:07,786 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:36:07,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:26:47" (3/4) ... [2021-10-15 20:36:07,790 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:36:07,851 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:36:07,853 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:36:07,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:36:07,858 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:36:08,058 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:36:08,059 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:36:08,061 INFO L168 Benchmark]: Toolchain (without parser) took 564083.54 ms. Allocated memory was 107.0 MB in the beginning and 4.4 GB in the end (delta: 4.2 GB). Free memory was 62.9 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.3 GB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,061 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 82.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:36:08,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 964.86 ms. Allocated memory was 107.0 MB in the beginning and 146.8 MB in the end (delta: 39.8 MB). Free memory was 62.8 MB in the beginning and 117.8 MB in the end (delta: -55.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 205.67 ms. Allocated memory is still 146.8 MB. Free memory was 117.8 MB in the beginning and 100.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,063 INFO L168 Benchmark]: Boogie Preprocessor took 198.65 ms. Allocated memory is still 146.8 MB. Free memory was 100.4 MB in the beginning and 91.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,063 INFO L168 Benchmark]: RCFGBuilder took 2360.72 ms. Allocated memory is still 146.8 MB. Free memory was 91.1 MB in the beginning and 67.6 MB in the end (delta: 23.5 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,064 INFO L168 Benchmark]: TraceAbstraction took 560068.65 ms. Allocated memory was 146.8 MB in the beginning and 4.4 GB in the end (delta: 4.2 GB). Free memory was 67.6 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,064 INFO L168 Benchmark]: Witness Printer took 273.84 ms. Allocated memory is still 4.4 GB. Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:36:08,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 82.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 964.86 ms. Allocated memory was 107.0 MB in the beginning and 146.8 MB in the end (delta: 39.8 MB). Free memory was 62.8 MB in the beginning and 117.8 MB in the end (delta: -55.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 205.67 ms. Allocated memory is still 146.8 MB. Free memory was 117.8 MB in the beginning and 100.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 198.65 ms. Allocated memory is still 146.8 MB. Free memory was 100.4 MB in the beginning and 91.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2360.72 ms. Allocated memory is still 146.8 MB. Free memory was 91.1 MB in the beginning and 67.6 MB in the end (delta: 23.5 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 560068.65 ms. Allocated memory was 146.8 MB in the beginning and 4.4 GB in the end (delta: 4.2 GB). Free memory was 67.6 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.1 GB. * Witness Printer took 273.84 ms. Allocated memory is still 4.4 GB. Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 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: 124]: 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, 283 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 10.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 559978.9ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 552670.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 283.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3424 SDtfs, 3578 SDslu, 6 SDs, 0 SdLazy, 14278 SolverSat, 2028 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17156.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 580 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=77287occurred in iteration=19, InterpolantAutomatonStates: 66, 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: 332.6ms SsaConstructionTime, 1155.5ms SatisfiabilityAnalysisTime, 4506.1ms InterpolantComputationTime, 5154 NumberOfCodeBlocks, 5154 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 5132 ConstructedInterpolants, 0 QuantifiedInterpolants, 14069 SizeOfPredicates, 0 NumberOfNonLiveVariables, 773 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 22 InterpolantComputations, 20 PerfectInterpolantSequences, 3453/3514 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 20:36:08,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52325231-0c05-4ef9-a7f6-fd5af157e19d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...