./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem10_label32.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_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/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_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem10_label32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/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_4b49d159-4433-4fe6-b30e-ec7f5926f010/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 a1f74c080a848632300db8de8c432db7720489b5 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:39:34,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:39:34,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:39:34,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:39:34,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:39:34,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:39:34,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:39:34,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:39:34,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:39:34,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:39:34,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:39:34,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:39:34,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:39:34,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:39:34,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:39:34,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:39:34,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:39:34,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:39:34,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:39:34,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:39:34,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:39:34,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:39:34,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:39:34,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:39:34,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:39:34,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:39:34,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:39:34,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:39:34,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:39:34,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:39:34,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:39:34,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:39:34,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:39:34,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:39:34,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:39:34,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:39:34,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:39:34,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:39:34,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:39:34,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:39:34,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:39:34,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:39:34,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:39:34,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:39:34,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:39:34,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:39:34,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:39:34,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:39:34,688 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:39:34,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:39:34,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:39:34,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:39:34,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:39:34,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:39:34,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:39:34,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:39:34,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:39:34,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:39:34,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:39:34,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:39:34,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:39:34,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:39:34,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:39:34,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:39:34,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:39:34,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:39:34,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:39:34,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:39:34,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:39:34,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:39:34,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:39:34,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:39:34,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:39:34,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:39:34,693 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_4b49d159-4433-4fe6-b30e-ec7f5926f010/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1f74c080a848632300db8de8c432db7720489b5 [2021-10-15 19:39:34,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:39:34,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:39:34,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:39:34,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:39:34,971 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:39:34,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem10_label32.c [2021-10-15 19:39:35,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/data/8f263f628/a7ad20e66acd4e6fb0d6c2aff6df2be1/FLAG78d20176b [2021-10-15 19:39:35,822 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:39:35,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/sv-benchmarks/c/eca-rers2012/Problem10_label32.c [2021-10-15 19:39:35,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/data/8f263f628/a7ad20e66acd4e6fb0d6c2aff6df2be1/FLAG78d20176b [2021-10-15 19:39:36,095 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/data/8f263f628/a7ad20e66acd4e6fb0d6c2aff6df2be1 [2021-10-15 19:39:36,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:39:36,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:39:36,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:39:36,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:39:36,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:39:36,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512bf088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36, skipping insertion in model container [2021-10-15 19:39:36,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:39:36,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:39:36,388 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_4b49d159-4433-4fe6-b30e-ec7f5926f010/sv-benchmarks/c/eca-rers2012/Problem10_label32.c[3048,3061] [2021-10-15 19:39:36,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:39:36,600 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:39:36,624 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_4b49d159-4433-4fe6-b30e-ec7f5926f010/sv-benchmarks/c/eca-rers2012/Problem10_label32.c[3048,3061] [2021-10-15 19:39:36,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:39:36,760 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:39:36,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36 WrapperNode [2021-10-15 19:39:36,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:39:36,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:39:36,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:39:36,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:39:36,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:39:36,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:39:36,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:39:36,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:39:36,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:36,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:37,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:39:37,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:39:37,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:39:37,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:39:37,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (1/1) ... [2021-10-15 19:39:37,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:39:37,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:37,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:39:37,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:39:37,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:39:37,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:39:37,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:39:37,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:39:38,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:39:38,354 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:39:38,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:38 BoogieIcfgContainer [2021-10-15 19:39:38,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:39:38,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:39:38,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:39:38,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:39:38,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:39:36" (1/3) ... [2021-10-15 19:39:38,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d74087d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:39:38, skipping insertion in model container [2021-10-15 19:39:38,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:36" (2/3) ... [2021-10-15 19:39:38,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d74087d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:39:38, skipping insertion in model container [2021-10-15 19:39:38,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:38" (3/3) ... [2021-10-15 19:39:38,369 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label32.c [2021-10-15 19:39:38,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:39:38,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:39:38,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:39:38,426 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:39:38,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:39:38,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:39:38,557 INFO L129 PetriNetUnfolder]: 139/344 cut-off events. [2021-10-15 19:39:38,557 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:38,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 344 events. 139/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 210 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:39:38,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:39:38,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 339 transitions, 678 flow [2021-10-15 19:39:38,582 INFO L129 PetriNetUnfolder]: 20/64 cut-off events. [2021-10-15 19:39:38,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:38,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:38,583 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] [2021-10-15 19:39:38,592 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2021-10-15 19:39:38,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:38,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945647061] [2021-10-15 19:39:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:38,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:38,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:38,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945647061] [2021-10-15 19:39:38,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945647061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:38,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:38,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:39:38,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098159246] [2021-10-15 19:39:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:38,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:38,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 339 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:38,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:38,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:39,919 INFO L129 PetriNetUnfolder]: 109/450 cut-off events. [2021-10-15 19:39:39,919 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:39,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 450 events. 109/450 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 478 event pairs, 0 based on Foata normal form. 61/342 useless extension candidates. Maximal degree in co-relation 1. Up to 261 conditions per place. [2021-10-15 19:39:39,925 INFO L132 encePairwiseOnDemand]: 146/344 looper letters, 339 selfloop transitions, 30 changer transitions 73/447 dead transitions. [2021-10-15 19:39:39,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 447 transitions, 1778 flow [2021-10-15 19:39:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 19:39:39,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2021-10-15 19:39:39,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 19:39:39,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 19:39:39,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:39,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 19:39:39,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,979 INFO L186 Difference]: Start difference. First operand has 203 places, 339 transitions, 678 flow. Second operand 3 states and 630 transitions. [2021-10-15 19:39:39,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 447 transitions, 1778 flow [2021-10-15 19:39:39,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 447 transitions, 1778 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:39:40,002 INFO L242 Difference]: Finished difference. Result has 207 places, 238 transitions, 730 flow [2021-10-15 19:39:40,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=207, PETRI_TRANSITIONS=238} [2021-10-15 19:39:40,006 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, 4 predicate places. [2021-10-15 19:39:40,006 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 238 transitions, 730 flow [2021-10-15 19:39:40,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:40,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:40,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:39:40,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1936190676, now seen corresponding path program 1 times [2021-10-15 19:39:40,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:40,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940727848] [2021-10-15 19:39:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:40,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:40,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:40,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940727848] [2021-10-15 19:39:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940727848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:40,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:40,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:40,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673854466] [2021-10-15 19:39:40,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:40,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:40,175 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:40,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 238 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:40,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:40,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:40,818 INFO L129 PetriNetUnfolder]: 106/526 cut-off events. [2021-10-15 19:39:40,819 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-10-15 19:39:40,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 526 events. 106/526 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 665 event pairs, 0 based on Foata normal form. 66/592 useless extension candidates. Maximal degree in co-relation 462. Up to 349 conditions per place. [2021-10-15 19:39:40,827 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 350 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2021-10-15 19:39:40,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 384 transitions, 1808 flow [2021-10-15 19:39:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:39:40,830 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:39:40,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:39:40,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:39:40,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:40,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:39:40,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,841 INFO L186 Difference]: Start difference. First operand has 207 places, 238 transitions, 730 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:39:40,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 384 transitions, 1808 flow [2021-10-15 19:39:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 384 transitions, 1740 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:40,871 INFO L242 Difference]: Finished difference. Result has 149 places, 248 transitions, 952 flow [2021-10-15 19:39:40,872 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=952, PETRI_PLACES=149, PETRI_TRANSITIONS=248} [2021-10-15 19:39:40,879 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -54 predicate places. [2021-10-15 19:39:40,879 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 248 transitions, 952 flow [2021-10-15 19:39:40,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:40,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:40,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:39:40,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash -860205413, now seen corresponding path program 1 times [2021-10-15 19:39:40,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:40,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611963167] [2021-10-15 19:39:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:40,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:41,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:41,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611963167] [2021-10-15 19:39:41,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611963167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:41,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:41,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:39:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675514393] [2021-10-15 19:39:41,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:41,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:41,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:41,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 248 transitions, 952 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:41,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:41,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:41,729 INFO L129 PetriNetUnfolder]: 116/675 cut-off events. [2021-10-15 19:39:41,729 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2021-10-15 19:39:41,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 675 events. 116/675 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1263 event pairs, 0 based on Foata normal form. 10/685 useless extension candidates. Maximal degree in co-relation 1127. Up to 525 conditions per place. [2021-10-15 19:39:41,734 INFO L132 encePairwiseOnDemand]: 323/344 looper letters, 378 selfloop transitions, 11 changer transitions 0/394 dead transitions. [2021-10-15 19:39:41,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 394 transitions, 2046 flow [2021-10-15 19:39:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2021-10-15 19:39:41,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2021-10-15 19:39:41,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2021-10-15 19:39:41,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2021-10-15 19:39:41,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:41,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2021-10-15 19:39:41,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,745 INFO L186 Difference]: Start difference. First operand has 149 places, 248 transitions, 952 flow. Second operand 3 states and 393 transitions. [2021-10-15 19:39:41,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 394 transitions, 2046 flow [2021-10-15 19:39:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 394 transitions, 1974 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:41,766 INFO L242 Difference]: Finished difference. Result has 150 places, 258 transitions, 997 flow [2021-10-15 19:39:41,767 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=997, PETRI_PLACES=150, PETRI_TRANSITIONS=258} [2021-10-15 19:39:41,767 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -53 predicate places. [2021-10-15 19:39:41,767 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 258 transitions, 997 flow [2021-10-15 19:39:41,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:41,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:41,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:39:41,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash -941890496, now seen corresponding path program 1 times [2021-10-15 19:39:41,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:41,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912102725] [2021-10-15 19:39:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:41,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:41,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:41,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912102725] [2021-10-15 19:39:41,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912102725] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:41,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:41,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:41,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837162903] [2021-10-15 19:39:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:41,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:41,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 258 transitions, 997 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:41,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:41,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:42,660 INFO L129 PetriNetUnfolder]: 151/849 cut-off events. [2021-10-15 19:39:42,661 INFO L130 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2021-10-15 19:39:42,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 849 events. 151/849 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2063 event pairs, 0 based on Foata normal form. 41/890 useless extension candidates. Maximal degree in co-relation 1206. Up to 654 conditions per place. [2021-10-15 19:39:42,668 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 372 selfloop transitions, 52 changer transitions 0/429 dead transitions. [2021-10-15 19:39:42,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 429 transitions, 2327 flow [2021-10-15 19:39:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:39:42,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:39:42,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:39:42,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:39:42,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:42,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:39:42,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,680 INFO L186 Difference]: Start difference. First operand has 150 places, 258 transitions, 997 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:39:42,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 429 transitions, 2327 flow [2021-10-15 19:39:42,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 429 transitions, 2308 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:39:42,732 INFO L242 Difference]: Finished difference. Result has 153 places, 293 transitions, 1530 flow [2021-10-15 19:39:42,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1530, PETRI_PLACES=153, PETRI_TRANSITIONS=293} [2021-10-15 19:39:42,733 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -50 predicate places. [2021-10-15 19:39:42,733 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 293 transitions, 1530 flow [2021-10-15 19:39:42,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,734 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:42,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:42,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:39:42,735 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash -960511640, now seen corresponding path program 1 times [2021-10-15 19:39:42,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:42,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579691255] [2021-10-15 19:39:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:42,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:42,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:42,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579691255] [2021-10-15 19:39:42,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579691255] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:42,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:42,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:39:42,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50950914] [2021-10-15 19:39:42,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:42,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:42,816 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:42,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 293 transitions, 1530 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:42,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:42,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:43,708 INFO L129 PetriNetUnfolder]: 146/1122 cut-off events. [2021-10-15 19:39:43,709 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2021-10-15 19:39:43,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2689 conditions, 1122 events. 146/1122 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3125 event pairs, 0 based on Foata normal form. 60/1182 useless extension candidates. Maximal degree in co-relation 1651. Up to 806 conditions per place. [2021-10-15 19:39:43,718 INFO L132 encePairwiseOnDemand]: 298/344 looper letters, 364 selfloop transitions, 55 changer transitions 0/424 dead transitions. [2021-10-15 19:39:43,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 424 transitions, 2608 flow [2021-10-15 19:39:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2021-10-15 19:39:43,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4050387596899225 [2021-10-15 19:39:43,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2021-10-15 19:39:43,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2021-10-15 19:39:43,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:43,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2021-10-15 19:39:43,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:43,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:43,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:43,730 INFO L186 Difference]: Start difference. First operand has 153 places, 293 transitions, 1530 flow. Second operand 3 states and 418 transitions. [2021-10-15 19:39:43,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 424 transitions, 2608 flow [2021-10-15 19:39:43,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 424 transitions, 2330 flow, removed 84 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:43,750 INFO L242 Difference]: Finished difference. Result has 155 places, 288 transitions, 1502 flow [2021-10-15 19:39:43,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1502, PETRI_PLACES=155, PETRI_TRANSITIONS=288} [2021-10-15 19:39:43,751 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -48 predicate places. [2021-10-15 19:39:43,752 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 288 transitions, 1502 flow [2021-10-15 19:39:43,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:43,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:43,753 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:39:43,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:39:43,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1136527372, now seen corresponding path program 1 times [2021-10-15 19:39:43,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:43,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221591978] [2021-10-15 19:39:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:43,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:43,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:43,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221591978] [2021-10-15 19:39:43,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221591978] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:43,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:43,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:39:43,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348564598] [2021-10-15 19:39:43,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:43,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:43,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:43,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 288 transitions, 1502 flow. Second operand has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:43,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:43,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:43,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:44,791 INFO L129 PetriNetUnfolder]: 145/1176 cut-off events. [2021-10-15 19:39:44,791 INFO L130 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2021-10-15 19:39:44,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2797 conditions, 1176 events. 145/1176 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2935 event pairs, 0 based on Foata normal form. 1/1177 useless extension candidates. Maximal degree in co-relation 2102. Up to 1095 conditions per place. [2021-10-15 19:39:44,798 INFO L132 encePairwiseOnDemand]: 338/344 looper letters, 278 selfloop transitions, 1 changer transitions 55/339 dead transitions. [2021-10-15 19:39:44,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 339 transitions, 2272 flow [2021-10-15 19:39:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:39:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:39:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2021-10-15 19:39:44,802 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.13330564784053156 [2021-10-15 19:39:44,802 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 321 transitions. [2021-10-15 19:39:44,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 321 transitions. [2021-10-15 19:39:44,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:44,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 321 transitions. [2021-10-15 19:39:44,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.857142857142854) internal successors, (321), 7 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,811 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,811 INFO L186 Difference]: Start difference. First operand has 155 places, 288 transitions, 1502 flow. Second operand 7 states and 321 transitions. [2021-10-15 19:39:44,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 339 transitions, 2272 flow [2021-10-15 19:39:44,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 339 transitions, 2122 flow, removed 20 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:44,832 INFO L242 Difference]: Finished difference. Result has 163 places, 284 transitions, 1328 flow [2021-10-15 19:39:44,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1328, PETRI_PLACES=163, PETRI_TRANSITIONS=284} [2021-10-15 19:39:44,833 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -40 predicate places. [2021-10-15 19:39:44,833 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 284 transitions, 1328 flow [2021-10-15 19:39:44,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:44,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:44,834 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:39:44,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:39:44,835 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash 967920538, now seen corresponding path program 1 times [2021-10-15 19:39:44,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:44,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040236956] [2021-10-15 19:39:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:44,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-15 19:39:44,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:44,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040236956] [2021-10-15 19:39:44,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040236956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:44,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806388981] [2021-10-15 19:39:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:44,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:44,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:44,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:39:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:45,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:39:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-10-15 19:39:45,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806388981] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:45,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:45,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-10-15 19:39:45,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430751355] [2021-10-15 19:39:45,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:45,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:39:45,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:45,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 284 transitions, 1328 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:45,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:45,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:45,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:46,939 INFO L129 PetriNetUnfolder]: 225/1757 cut-off events. [2021-10-15 19:39:46,943 INFO L130 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2021-10-15 19:39:46,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4140 conditions, 1757 events. 225/1757 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5543 event pairs, 0 based on Foata normal form. 1/1758 useless extension candidates. Maximal degree in co-relation 4122. Up to 1138 conditions per place. [2021-10-15 19:39:46,954 INFO L132 encePairwiseOnDemand]: 287/344 looper letters, 403 selfloop transitions, 95 changer transitions 0/503 dead transitions. [2021-10-15 19:39:46,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 503 transitions, 3228 flow [2021-10-15 19:39:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 19:39:46,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2021-10-15 19:39:46,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 19:39:46,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 19:39:46,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:46,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 19:39:46,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:46,965 INFO L186 Difference]: Start difference. First operand has 163 places, 284 transitions, 1328 flow. Second operand 3 states and 422 transitions. [2021-10-15 19:39:46,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 503 transitions, 3228 flow [2021-10-15 19:39:46,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 503 transitions, 3211 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-10-15 19:39:47,003 INFO L242 Difference]: Finished difference. Result has 158 places, 367 transitions, 2491 flow [2021-10-15 19:39:47,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2491, PETRI_PLACES=158, PETRI_TRANSITIONS=367} [2021-10-15 19:39:47,005 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -45 predicate places. [2021-10-15 19:39:47,005 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 367 transitions, 2491 flow [2021-10-15 19:39:47,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:47,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:47,007 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:39:47,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:47,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:39:47,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash 274581562, now seen corresponding path program 1 times [2021-10-15 19:39:47,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:47,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027156002] [2021-10-15 19:39:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:47,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-15 19:39:47,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:47,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027156002] [2021-10-15 19:39:47,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027156002] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:47,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:47,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:47,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801970195] [2021-10-15 19:39:47,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:47,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:47,374 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:47,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 367 transitions, 2491 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:47,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:47,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:47,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:48,778 INFO L129 PetriNetUnfolder]: 255/2065 cut-off events. [2021-10-15 19:39:48,778 INFO L130 PetriNetUnfolder]: For 2233/2233 co-relation queries the response was YES. [2021-10-15 19:39:48,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5112 conditions, 2065 events. 255/2065 cut-off events. For 2233/2233 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7141 event pairs, 0 based on Foata normal form. 69/2134 useless extension candidates. Maximal degree in co-relation 5095. Up to 1703 conditions per place. [2021-10-15 19:39:48,793 INFO L132 encePairwiseOnDemand]: 290/344 looper letters, 468 selfloop transitions, 60 changer transitions 0/533 dead transitions. [2021-10-15 19:39:48,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 533 transitions, 4149 flow [2021-10-15 19:39:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 19:39:48,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2021-10-15 19:39:48,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 19:39:48,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 19:39:48,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:48,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 19:39:48,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,808 INFO L186 Difference]: Start difference. First operand has 158 places, 367 transitions, 2491 flow. Second operand 3 states and 422 transitions. [2021-10-15 19:39:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 533 transitions, 4149 flow [2021-10-15 19:39:48,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 533 transitions, 3911 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:48,841 INFO L242 Difference]: Finished difference. Result has 160 places, 397 transitions, 3005 flow [2021-10-15 19:39:48,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3005, PETRI_PLACES=160, PETRI_TRANSITIONS=397} [2021-10-15 19:39:48,842 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -43 predicate places. [2021-10-15 19:39:48,842 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 397 transitions, 3005 flow [2021-10-15 19:39:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:48,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:48,844 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:39:48,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1340827043, now seen corresponding path program 1 times [2021-10-15 19:39:48,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:48,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744153471] [2021-10-15 19:39:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:48,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-10-15 19:39:49,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:49,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744153471] [2021-10-15 19:39:49,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744153471] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:49,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:49,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:49,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836861890] [2021-10-15 19:39:49,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:49,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:49,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:39:49,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 397 transitions, 3005 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:49,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:49,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:39:49,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:50,703 INFO L129 PetriNetUnfolder]: 206/2292 cut-off events. [2021-10-15 19:39:50,704 INFO L130 PetriNetUnfolder]: For 2306/2306 co-relation queries the response was YES. [2021-10-15 19:39:50,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 2292 events. 206/2292 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8785 event pairs, 0 based on Foata normal form. 74/2366 useless extension candidates. Maximal degree in co-relation 5373. Up to 1834 conditions per place. [2021-10-15 19:39:50,714 INFO L132 encePairwiseOnDemand]: 292/344 looper letters, 0 selfloop transitions, 0 changer transitions 482/482 dead transitions. [2021-10-15 19:39:50,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 482 transitions, 3603 flow [2021-10-15 19:39:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2021-10-15 19:39:50,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40794573643410853 [2021-10-15 19:39:50,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2021-10-15 19:39:50,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2021-10-15 19:39:50,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:50,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2021-10-15 19:39:50,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,728 INFO L186 Difference]: Start difference. First operand has 160 places, 397 transitions, 3005 flow. Second operand 3 states and 421 transitions. [2021-10-15 19:39:50,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 482 transitions, 3603 flow [2021-10-15 19:39:50,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 482 transitions, 3345 flow, removed 78 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:50,764 INFO L242 Difference]: Finished difference. Result has 158 places, 0 transitions, 0 flow [2021-10-15 19:39:50,765 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=158, PETRI_TRANSITIONS=0} [2021-10-15 19:39:50,765 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -45 predicate places. [2021-10-15 19:39:50,766 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 0 transitions, 0 flow [2021-10-15 19:39:50,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,769 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:39:50,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:39:50,776 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:39:50,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:39:50 BoogieIcfgContainer [2021-10-15 19:39:50,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:39:50,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:39:50,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:39:50,787 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:39:50,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:38" (3/4) ... [2021-10-15 19:39:50,791 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:39:50,830 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:39:50,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:39:50,833 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:39:50,834 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:39:51,004 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:39:51,004 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:39:51,006 INFO L168 Benchmark]: Toolchain (without parser) took 14903.01 ms. Allocated memory was 98.6 MB in the beginning and 239.1 MB in the end (delta: 140.5 MB). Free memory was 60.8 MB in the beginning and 151.4 MB in the end (delta: -90.6 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:39:51,006 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory was 68.8 MB in the beginning and 68.7 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:39:51,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 656.62 ms. Allocated memory is still 98.6 MB. Free memory was 60.6 MB in the beginning and 56.2 MB in the end (delta: 4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:39:51,008 INFO L168 Benchmark]: Boogie Procedure Inliner took 118.51 ms. Allocated memory is still 98.6 MB. Free memory was 56.2 MB in the beginning and 48.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:39:51,008 INFO L168 Benchmark]: Boogie Preprocessor took 128.34 ms. Allocated memory is still 98.6 MB. Free memory was 48.2 MB in the beginning and 43.7 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:39:51,009 INFO L168 Benchmark]: RCFGBuilder took 1346.73 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 43.5 MB in the beginning and 52.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:39:51,009 INFO L168 Benchmark]: TraceAbstraction took 12424.95 ms. Allocated memory was 132.1 MB in the beginning and 239.1 MB in the end (delta: 107.0 MB). Free memory was 52.4 MB in the beginning and 166.1 MB in the end (delta: -113.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:39:51,010 INFO L168 Benchmark]: Witness Printer took 217.30 ms. Allocated memory is still 239.1 MB. Free memory was 166.1 MB in the beginning and 151.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:39:51,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory was 68.8 MB in the beginning and 68.7 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 656.62 ms. Allocated memory is still 98.6 MB. Free memory was 60.6 MB in the beginning and 56.2 MB in the end (delta: 4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 118.51 ms. Allocated memory is still 98.6 MB. Free memory was 56.2 MB in the beginning and 48.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 128.34 ms. Allocated memory is still 98.6 MB. Free memory was 48.2 MB in the beginning and 43.7 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1346.73 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 43.5 MB in the beginning and 52.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12424.95 ms. Allocated memory was 132.1 MB in the beginning and 239.1 MB in the end (delta: 107.0 MB). Free memory was 52.4 MB in the beginning and 166.1 MB in the end (delta: -113.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 217.30 ms. Allocated memory is still 239.1 MB. Free memory was 166.1 MB in the beginning and 151.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 89]: 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, 206 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12360.5ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 9468.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 149.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1004 SDtfs, 1038 SDslu, 0 SDs, 0 SdLazy, 3398 SolverSat, 508 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3853.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3005occurred in iteration=8, InterpolantAutomatonStates: 31, 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: 107.6ms SsaConstructionTime, 422.3ms SatisfiabilityAnalysisTime, 1699.1ms InterpolantComputationTime, 1618 NumberOfCodeBlocks, 1618 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 5133 SizeOfPredicates, 0 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 870/917 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:39:51,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b49d159-4433-4fe6-b30e-ec7f5926f010/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...