./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label05.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_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/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_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/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_7dc2cf90-b290-48a8-ad08-6c7067b117d6/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 a83405447735331b883b1abbbdcfee86db37bc76 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:12:06,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:12:06,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:12:06,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:12:06,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:12:06,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:12:06,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:12:06,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:12:06,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:12:06,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:12:06,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:12:06,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:12:06,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:12:06,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:12:06,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:12:06,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:12:06,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:12:06,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:12:06,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:12:06,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:12:06,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:12:06,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:12:06,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:12:06,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:12:06,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:12:06,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:12:06,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:12:06,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:12:06,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:12:06,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:12:06,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:12:06,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:12:06,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:12:06,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:12:06,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:12:06,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:12:06,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:12:06,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:12:06,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:12:06,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:12:06,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:12:06,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:12:06,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:12:06,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:12:06,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:12:06,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:12:06,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:12:06,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:12:06,877 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:12:06,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:12:06,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:12:06,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:12:06,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:12:06,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:12:06,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:12:06,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:12:06,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:12:06,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:12:06,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:12:06,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:12:06,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:12:06,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:12:06,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:12:06,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:12:06,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:12:06,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:12:06,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:12:06,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:12:06,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:12:06,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:12:06,886 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:12:06,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:12:06,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:12:06,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:12:06,890 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_7dc2cf90-b290-48a8-ad08-6c7067b117d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a83405447735331b883b1abbbdcfee86db37bc76 [2021-10-15 19:12:07,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:12:07,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:12:07,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:12:07,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:12:07,293 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:12:07,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem02_label05.c [2021-10-15 19:12:07,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/data/90bf87e0f/bc3aa8f7eb81408e8a36a4773694ac9f/FLAG5356d26e0 [2021-10-15 19:12:08,039 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:12:08,040 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/sv-benchmarks/c/eca-rers2012/Problem02_label05.c [2021-10-15 19:12:08,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/data/90bf87e0f/bc3aa8f7eb81408e8a36a4773694ac9f/FLAG5356d26e0 [2021-10-15 19:12:08,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/data/90bf87e0f/bc3aa8f7eb81408e8a36a4773694ac9f [2021-10-15 19:12:08,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:12:08,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:12:08,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:12:08,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:12:08,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:12:08,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:12:08" (1/1) ... [2021-10-15 19:12:08,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c40efd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:08, skipping insertion in model container [2021-10-15 19:12:08,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:12:08" (1/1) ... [2021-10-15 19:12:08,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:12:08,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:12:08,820 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_7dc2cf90-b290-48a8-ad08-6c7067b117d6/sv-benchmarks/c/eca-rers2012/Problem02_label05.c[19738,19751] [2021-10-15 19:12:08,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:12:08,860 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:12:09,021 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_7dc2cf90-b290-48a8-ad08-6c7067b117d6/sv-benchmarks/c/eca-rers2012/Problem02_label05.c[19738,19751] [2021-10-15 19:12:09,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:12:09,050 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:12:09,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09 WrapperNode [2021-10-15 19:12:09,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:12:09,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:12:09,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:12:09,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:12:09,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:12:09,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:12:09,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:12:09,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:12:09,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:12:09,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:12:09,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:12:09,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:12:09,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (1/1) ... [2021-10-15 19:12:09,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:12:09,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:12:09,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:12:09,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:12:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:12:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:12:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:12:09,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:12:10,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:12:10,906 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:12:10,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:12:10 BoogieIcfgContainer [2021-10-15 19:12:10,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:12:10,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:12:10,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:12:10,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:12:10,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:12:08" (1/3) ... [2021-10-15 19:12:10,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be59132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:12:10, skipping insertion in model container [2021-10-15 19:12:10,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:12:09" (2/3) ... [2021-10-15 19:12:10,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be59132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:12:10, skipping insertion in model container [2021-10-15 19:12:10,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:12:10" (3/3) ... [2021-10-15 19:12:10,925 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label05.c [2021-10-15 19:12:10,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:12:10,932 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:12:10,994 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:12:11,002 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 19:12:11,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:12:11,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:12:11,157 INFO L129 PetriNetUnfolder]: 149/375 cut-off events. [2021-10-15 19:12:11,158 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:12:11,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 375 events. 149/375 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 260 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:12:11,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:12:11,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 370 transitions, 740 flow [2021-10-15 19:12:11,235 INFO L129 PetriNetUnfolder]: 131/323 cut-off events. [2021-10-15 19:12:11,235 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:12:11,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:11,236 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:11,237 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 224978685, now seen corresponding path program 1 times [2021-10-15 19:12:11,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:11,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142398834] [2021-10-15 19:12:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:11,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:11,840 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 19:12:11,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:11,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142398834] [2021-10-15 19:12:11,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142398834] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:11,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:12:11,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698801136] [2021-10-15 19:12:11,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:11,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:11,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:12:11,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 370 transitions, 740 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:11,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:11,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:12:11,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:12,949 INFO L129 PetriNetUnfolder]: 116/484 cut-off events. [2021-10-15 19:12:12,950 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:12:12,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 484 events. 116/484 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 741 event pairs, 0 based on Foata normal form. 61/373 useless extension candidates. Maximal degree in co-relation 2. Up to 272 conditions per place. [2021-10-15 19:12:12,963 INFO L132 encePairwiseOnDemand]: 171/375 looper letters, 352 selfloop transitions, 33 changer transitions 73/478 dead transitions. [2021-10-15 19:12:12,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 478 transitions, 1872 flow [2021-10-15 19:12:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2021-10-15 19:12:12,994 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6195555555555555 [2021-10-15 19:12:12,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2021-10-15 19:12:12,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2021-10-15 19:12:13,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:13,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2021-10-15 19:12:13,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:13,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:13,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:13,037 INFO L186 Difference]: Start difference. First operand has 224 places, 370 transitions, 740 flow. Second operand 3 states and 697 transitions. [2021-10-15 19:12:13,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 478 transitions, 1872 flow [2021-10-15 19:12:13,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 478 transitions, 1872 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:12:13,094 INFO L242 Difference]: Finished difference. Result has 228 places, 266 transitions, 798 flow [2021-10-15 19:12:13,097 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=798, PETRI_PLACES=228, PETRI_TRANSITIONS=266} [2021-10-15 19:12:13,098 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, 4 predicate places. [2021-10-15 19:12:13,100 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 266 transitions, 798 flow [2021-10-15 19:12:13,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:13,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:13,102 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:12:13,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:12:13,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash -750392, now seen corresponding path program 1 times [2021-10-15 19:12:13,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:13,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471432010] [2021-10-15 19:12:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:13,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:12:13,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:13,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471432010] [2021-10-15 19:12:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471432010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:13,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:13,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:12:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482013384] [2021-10-15 19:12:13,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:13,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:13,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:13,407 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:12:13,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 266 transitions, 798 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:13,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:13,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:12:13,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:14,157 INFO L129 PetriNetUnfolder]: 192/781 cut-off events. [2021-10-15 19:12:14,158 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2021-10-15 19:12:14,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 781 events. 192/781 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1914 event pairs, 0 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 583. Up to 436 conditions per place. [2021-10-15 19:12:14,169 INFO L132 encePairwiseOnDemand]: 293/375 looper letters, 367 selfloop transitions, 94 changer transitions 0/488 dead transitions. [2021-10-15 19:12:14,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 488 transitions, 2378 flow [2021-10-15 19:12:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2021-10-15 19:12:14,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.464 [2021-10-15 19:12:14,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2021-10-15 19:12:14,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2021-10-15 19:12:14,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:14,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2021-10-15 19:12:14,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:14,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:14,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:14,191 INFO L186 Difference]: Start difference. First operand has 228 places, 266 transitions, 798 flow. Second operand 3 states and 522 transitions. [2021-10-15 19:12:14,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 488 transitions, 2378 flow [2021-10-15 19:12:14,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 488 transitions, 2266 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:12:14,231 INFO L242 Difference]: Finished difference. Result has 170 places, 352 transitions, 1624 flow [2021-10-15 19:12:14,232 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1624, PETRI_PLACES=170, PETRI_TRANSITIONS=352} [2021-10-15 19:12:14,240 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -54 predicate places. [2021-10-15 19:12:14,240 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 352 transitions, 1624 flow [2021-10-15 19:12:14,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:14,241 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:14,242 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:12:14,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:12:14,242 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1327285959, now seen corresponding path program 1 times [2021-10-15 19:12:14,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:14,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396858535] [2021-10-15 19:12:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:14,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:12:14,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:14,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396858535] [2021-10-15 19:12:14,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396858535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:14,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:14,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:12:14,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379132613] [2021-10-15 19:12:14,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:14,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:14,377 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 375 [2021-10-15 19:12:14,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 352 transitions, 1624 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:14,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:14,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 375 [2021-10-15 19:12:14,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:15,278 INFO L129 PetriNetUnfolder]: 325/1347 cut-off events. [2021-10-15 19:12:15,278 INFO L130 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2021-10-15 19:12:15,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 1347 events. 325/1347 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4899 event pairs, 0 based on Foata normal form. 36/1373 useless extension candidates. Maximal degree in co-relation 1730. Up to 752 conditions per place. [2021-10-15 19:12:15,288 INFO L132 encePairwiseOnDemand]: 332/375 looper letters, 532 selfloop transitions, 66 changer transitions 0/621 dead transitions. [2021-10-15 19:12:15,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 621 transitions, 3998 flow [2021-10-15 19:12:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2021-10-15 19:12:15,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.464 [2021-10-15 19:12:15,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2021-10-15 19:12:15,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2021-10-15 19:12:15,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:15,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2021-10-15 19:12:15,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:15,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:15,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:15,302 INFO L186 Difference]: Start difference. First operand has 170 places, 352 transitions, 1624 flow. Second operand 3 states and 522 transitions. [2021-10-15 19:12:15,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 621 transitions, 3998 flow [2021-10-15 19:12:15,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 621 transitions, 3686 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:12:15,333 INFO L242 Difference]: Finished difference. Result has 171 places, 389 transitions, 1968 flow [2021-10-15 19:12:15,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1968, PETRI_PLACES=171, PETRI_TRANSITIONS=389} [2021-10-15 19:12:15,334 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -53 predicate places. [2021-10-15 19:12:15,334 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 389 transitions, 1968 flow [2021-10-15 19:12:15,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:15,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:15,336 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:12:15,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:12:15,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -209271223, now seen corresponding path program 1 times [2021-10-15 19:12:15,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:15,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239036713] [2021-10-15 19:12:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:15,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:12:15,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:15,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239036713] [2021-10-15 19:12:15,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239036713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:15,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:15,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:12:15,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752761679] [2021-10-15 19:12:15,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:15,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:15,448 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:12:15,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 389 transitions, 1968 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:15,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:15,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:12:15,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:16,591 INFO L129 PetriNetUnfolder]: 565/2443 cut-off events. [2021-10-15 19:12:16,592 INFO L130 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2021-10-15 19:12:16,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6094 conditions, 2443 events. 565/2443 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12220 event pairs, 0 based on Foata normal form. 64/2495 useless extension candidates. Maximal degree in co-relation 1945. Up to 1199 conditions per place. [2021-10-15 19:12:16,611 INFO L132 encePairwiseOnDemand]: 291/375 looper letters, 477 selfloop transitions, 182 changer transitions 0/691 dead transitions. [2021-10-15 19:12:16,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 691 transitions, 4813 flow [2021-10-15 19:12:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2021-10-15 19:12:16,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4737777777777778 [2021-10-15 19:12:16,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2021-10-15 19:12:16,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2021-10-15 19:12:16,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:16,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2021-10-15 19:12:16,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:16,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:16,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:16,625 INFO L186 Difference]: Start difference. First operand has 171 places, 389 transitions, 1968 flow. Second operand 3 states and 533 transitions. [2021-10-15 19:12:16,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 691 transitions, 4813 flow [2021-10-15 19:12:16,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 691 transitions, 4694 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:12:16,663 INFO L242 Difference]: Finished difference. Result has 174 places, 553 transitions, 4168 flow [2021-10-15 19:12:16,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4168, PETRI_PLACES=174, PETRI_TRANSITIONS=553} [2021-10-15 19:12:16,664 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -50 predicate places. [2021-10-15 19:12:16,664 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 553 transitions, 4168 flow [2021-10-15 19:12:16,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:16,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:16,666 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:16,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:12:16,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2084281269, now seen corresponding path program 1 times [2021-10-15 19:12:16,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:16,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420543346] [2021-10-15 19:12:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:16,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:12:16,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:16,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420543346] [2021-10-15 19:12:16,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420543346] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:16,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:16,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:12:16,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252712763] [2021-10-15 19:12:16,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:16,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:16,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:12:16,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 553 transitions, 4168 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:16,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:16,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:12:16,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:18,331 INFO L129 PetriNetUnfolder]: 625/3207 cut-off events. [2021-10-15 19:12:18,331 INFO L130 PetriNetUnfolder]: For 4605/4605 co-relation queries the response was YES. [2021-10-15 19:12:18,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8659 conditions, 3207 events. 625/3207 cut-off events. For 4605/4605 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 18255 event pairs, 0 based on Foata normal form. 240/3445 useless extension candidates. Maximal degree in co-relation 2333. Up to 1998 conditions per place. [2021-10-15 19:12:18,357 INFO L132 encePairwiseOnDemand]: 292/375 looper letters, 569 selfloop transitions, 170 changer transitions 0/759 dead transitions. [2021-10-15 19:12:18,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 759 transitions, 6568 flow [2021-10-15 19:12:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2021-10-15 19:12:18,361 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45155555555555554 [2021-10-15 19:12:18,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2021-10-15 19:12:18,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2021-10-15 19:12:18,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:18,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2021-10-15 19:12:18,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:18,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:18,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:18,370 INFO L186 Difference]: Start difference. First operand has 174 places, 553 transitions, 4168 flow. Second operand 3 states and 508 transitions. [2021-10-15 19:12:18,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 759 transitions, 6568 flow [2021-10-15 19:12:18,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 759 transitions, 6134 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:12:18,448 INFO L242 Difference]: Finished difference. Result has 176 places, 623 transitions, 5488 flow [2021-10-15 19:12:18,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5488, PETRI_PLACES=176, PETRI_TRANSITIONS=623} [2021-10-15 19:12:18,449 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -48 predicate places. [2021-10-15 19:12:18,450 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 623 transitions, 5488 flow [2021-10-15 19:12:18,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:18,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:18,451 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:18,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:12:18,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:18,453 INFO L82 PathProgramCache]: Analyzing trace with hash -981462150, now seen corresponding path program 1 times [2021-10-15 19:12:18,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:18,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528171911] [2021-10-15 19:12:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:18,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-15 19:12:18,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:18,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528171911] [2021-10-15 19:12:18,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528171911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:18,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:18,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:12:18,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969910207] [2021-10-15 19:12:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:18,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:18,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:12:18,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 623 transitions, 5488 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:18,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:18,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:12:18,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:21,068 INFO L129 PetriNetUnfolder]: 765/4886 cut-off events. [2021-10-15 19:12:21,068 INFO L130 PetriNetUnfolder]: For 7813/7813 co-relation queries the response was YES. [2021-10-15 19:12:21,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13117 conditions, 4886 events. 765/4886 cut-off events. For 7813/7813 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 33171 event pairs, 0 based on Foata normal form. 199/5082 useless extension candidates. Maximal degree in co-relation 3979. Up to 2792 conditions per place. [2021-10-15 19:12:21,103 INFO L132 encePairwiseOnDemand]: 288/375 looper letters, 537 selfloop transitions, 325 changer transitions 0/896 dead transitions. [2021-10-15 19:12:21,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 896 transitions, 9018 flow [2021-10-15 19:12:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2021-10-15 19:12:21,107 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4631111111111111 [2021-10-15 19:12:21,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2021-10-15 19:12:21,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2021-10-15 19:12:21,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:21,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2021-10-15 19:12:21,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:21,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:21,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:21,117 INFO L186 Difference]: Start difference. First operand has 176 places, 623 transitions, 5488 flow. Second operand 3 states and 521 transitions. [2021-10-15 19:12:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 896 transitions, 9018 flow [2021-10-15 19:12:21,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 896 transitions, 8574 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:12:21,175 INFO L242 Difference]: Finished difference. Result has 178 places, 760 transitions, 8296 flow [2021-10-15 19:12:21,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4762, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8296, PETRI_PLACES=178, PETRI_TRANSITIONS=760} [2021-10-15 19:12:21,176 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -46 predicate places. [2021-10-15 19:12:21,176 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 760 transitions, 8296 flow [2021-10-15 19:12:21,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:21,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:21,178 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:12:21,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:12:21,178 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash 845932029, now seen corresponding path program 1 times [2021-10-15 19:12:21,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:21,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119955771] [2021-10-15 19:12:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:21,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-15 19:12:21,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:21,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119955771] [2021-10-15 19:12:21,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119955771] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:21,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:21,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:12:21,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236730590] [2021-10-15 19:12:21,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:21,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:21,297 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:12:21,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 760 transitions, 8296 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:21,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:21,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:12:21,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:24,680 INFO L129 PetriNetUnfolder]: 690/5513 cut-off events. [2021-10-15 19:12:24,680 INFO L130 PetriNetUnfolder]: For 10634/10634 co-relation queries the response was YES. [2021-10-15 19:12:24,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14728 conditions, 5513 events. 690/5513 cut-off events. For 10634/10634 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 40455 event pairs, 0 based on Foata normal form. 135/5645 useless extension candidates. Maximal degree in co-relation 5709. Up to 4324 conditions per place. [2021-10-15 19:12:24,710 INFO L132 encePairwiseOnDemand]: 347/375 looper letters, 576 selfloop transitions, 75 changer transitions 162/831 dead transitions. [2021-10-15 19:12:24,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 831 transitions, 9224 flow [2021-10-15 19:12:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2021-10-15 19:12:24,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40355555555555556 [2021-10-15 19:12:24,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2021-10-15 19:12:24,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2021-10-15 19:12:24,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:24,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2021-10-15 19:12:24,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:24,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:24,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:24,724 INFO L186 Difference]: Start difference. First operand has 178 places, 760 transitions, 8296 flow. Second operand 3 states and 454 transitions. [2021-10-15 19:12:24,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 831 transitions, 9224 flow [2021-10-15 19:12:24,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 831 transitions, 8670 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:12:24,781 INFO L242 Difference]: Finished difference. Result has 180 places, 532 transitions, 5150 flow [2021-10-15 19:12:24,783 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=6558, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5150, PETRI_PLACES=180, PETRI_TRANSITIONS=532} [2021-10-15 19:12:24,783 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -44 predicate places. [2021-10-15 19:12:24,783 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 532 transitions, 5150 flow [2021-10-15 19:12:24,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:24,784 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:24,784 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:12:24,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:12:24,785 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash -649639097, now seen corresponding path program 1 times [2021-10-15 19:12:24,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:24,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862112654] [2021-10-15 19:12:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:24,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-15 19:12:24,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:24,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862112654] [2021-10-15 19:12:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862112654] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:24,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:12:24,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:12:24,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248980231] [2021-10-15 19:12:24,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:24,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:12:24,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:12:24,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 532 transitions, 5150 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:24,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:24,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:12:24,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:26,950 INFO L129 PetriNetUnfolder]: 370/4485 cut-off events. [2021-10-15 19:12:26,950 INFO L130 PetriNetUnfolder]: For 6170/6170 co-relation queries the response was YES. [2021-10-15 19:12:26,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10619 conditions, 4485 events. 370/4485 cut-off events. For 6170/6170 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 31026 event pairs, 0 based on Foata normal form. 93/4575 useless extension candidates. Maximal degree in co-relation 6230. Up to 2056 conditions per place. [2021-10-15 19:12:26,969 INFO L132 encePairwiseOnDemand]: 324/375 looper letters, 438 selfloop transitions, 126 changer transitions 3/599 dead transitions. [2021-10-15 19:12:26,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 599 transitions, 5762 flow [2021-10-15 19:12:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2021-10-15 19:12:26,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42488888888888887 [2021-10-15 19:12:26,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2021-10-15 19:12:26,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2021-10-15 19:12:26,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:26,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2021-10-15 19:12:26,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:26,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:26,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:26,981 INFO L186 Difference]: Start difference. First operand has 180 places, 532 transitions, 5150 flow. Second operand 3 states and 478 transitions. [2021-10-15 19:12:26,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 599 transitions, 5762 flow [2021-10-15 19:12:27,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 599 transitions, 5640 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:12:27,016 INFO L242 Difference]: Finished difference. Result has 178 places, 456 transitions, 4332 flow [2021-10-15 19:12:27,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4332, PETRI_PLACES=178, PETRI_TRANSITIONS=456} [2021-10-15 19:12:27,018 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -46 predicate places. [2021-10-15 19:12:27,018 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 456 transitions, 4332 flow [2021-10-15 19:12:27,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:27,019 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:12:27,019 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:12:27,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:12:27,020 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:12:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:12:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash 95408104, now seen corresponding path program 1 times [2021-10-15 19:12:27,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:12:27,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667388982] [2021-10-15 19:12:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:27,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:12:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 68 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:12:27,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:12:27,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667388982] [2021-10-15 19:12:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667388982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:12:27,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690997872] [2021-10-15 19:12:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:12:27,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:12:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:12:27,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:12:27,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:12:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:12:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:12:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:12:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-15 19:12:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690997872] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:12:28,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:12:28,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:12:28,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21597119] [2021-10-15 19:12:28,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:12:28,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:12:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:12:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:12:28,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:12:28,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 456 transitions, 4332 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:28,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:12:28,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:12:28,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:12:29,896 INFO L129 PetriNetUnfolder]: 336/4446 cut-off events. [2021-10-15 19:12:29,896 INFO L130 PetriNetUnfolder]: For 4982/4982 co-relation queries the response was YES. [2021-10-15 19:12:29,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10734 conditions, 4446 events. 336/4446 cut-off events. For 4982/4982 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 30879 event pairs, 0 based on Foata normal form. 32/4478 useless extension candidates. Maximal degree in co-relation 6575. Up to 2879 conditions per place. [2021-10-15 19:12:29,905 INFO L132 encePairwiseOnDemand]: 349/375 looper letters, 0 selfloop transitions, 0 changer transitions 565/565 dead transitions. [2021-10-15 19:12:29,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 565 transitions, 5372 flow [2021-10-15 19:12:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:12:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:12:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2021-10-15 19:12:29,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37422222222222223 [2021-10-15 19:12:29,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2021-10-15 19:12:29,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2021-10-15 19:12:29,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:12:29,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2021-10-15 19:12:29,912 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 19:12:29,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:29,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:29,916 INFO L186 Difference]: Start difference. First operand has 178 places, 456 transitions, 4332 flow. Second operand 3 states and 421 transitions. [2021-10-15 19:12:29,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 565 transitions, 5372 flow [2021-10-15 19:12:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 565 transitions, 5254 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:12:29,942 INFO L242 Difference]: Finished difference. Result has 177 places, 0 transitions, 0 flow [2021-10-15 19:12:29,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=177, PETRI_TRANSITIONS=0} [2021-10-15 19:12:29,943 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -47 predicate places. [2021-10-15 19:12:29,943 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 0 transitions, 0 flow [2021-10-15 19:12:29,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:12:29,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:12:29,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:12:30,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:12:30,165 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:12:30,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:12:30 BoogieIcfgContainer [2021-10-15 19:12:30,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:12:30,171 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:12:30,171 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:12:30,172 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:12:30,172 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:12:10" (3/4) ... [2021-10-15 19:12:30,175 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:12:30,208 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:12:30,218 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:12:30,220 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:12:30,221 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:12:30,418 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:12:30,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:12:30,420 INFO L168 Benchmark]: Toolchain (without parser) took 22107.06 ms. Allocated memory was 94.4 MB in the beginning and 505.4 MB in the end (delta: 411.0 MB). Free memory was 60.3 MB in the beginning and 136.3 MB in the end (delta: -76.0 MB). Peak memory consumption was 335.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,421 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:12:30,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 747.23 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 60.1 MB in the beginning and 95.1 MB in the end (delta: -35.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 122.65 ms. Allocated memory is still 134.2 MB. Free memory was 94.3 MB in the beginning and 89.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,423 INFO L168 Benchmark]: Boogie Preprocessor took 92.21 ms. Allocated memory is still 134.2 MB. Free memory was 89.4 MB in the beginning and 85.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,423 INFO L168 Benchmark]: RCFGBuilder took 1631.42 ms. Allocated memory is still 134.2 MB. Free memory was 85.2 MB in the beginning and 96.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,424 INFO L168 Benchmark]: TraceAbstraction took 19255.79 ms. Allocated memory was 134.2 MB in the beginning and 505.4 MB in the end (delta: 371.2 MB). Free memory was 96.9 MB in the beginning and 150.3 MB in the end (delta: -53.4 MB). Peak memory consumption was 317.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,425 INFO L168 Benchmark]: Witness Printer took 247.15 ms. Allocated memory is still 505.4 MB. Free memory was 150.3 MB in the beginning and 136.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:12:30,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 747.23 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 60.1 MB in the beginning and 95.1 MB in the end (delta: -35.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 122.65 ms. Allocated memory is still 134.2 MB. Free memory was 94.3 MB in the beginning and 89.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.21 ms. Allocated memory is still 134.2 MB. Free memory was 89.4 MB in the beginning and 85.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1631.42 ms. Allocated memory is still 134.2 MB. Free memory was 85.2 MB in the beginning and 96.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19255.79 ms. Allocated memory was 134.2 MB in the beginning and 505.4 MB in the end (delta: 371.2 MB). Free memory was 96.9 MB in the beginning and 150.3 MB in the end (delta: -53.4 MB). Peak memory consumption was 317.4 MB. Max. memory is 16.1 GB. * Witness Printer took 247.15 ms. Allocated memory is still 505.4 MB. Free memory was 150.3 MB in the beginning and 136.3 MB in the end (delta: 14.0 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: 560]: 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, 227 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 60.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19176.6ms, OverallIterations: 9, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 15932.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 172.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 688 SDtfs, 1005 SDslu, 0 SDs, 0 SdLazy, 3266 SolverSat, 660 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4000.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 247 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8296occurred in iteration=6, InterpolantAutomatonStates: 27, 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: 151.9ms SsaConstructionTime, 390.0ms SatisfiabilityAnalysisTime, 1916.1ms InterpolantComputationTime, 1717 NumberOfCodeBlocks, 1717 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1707 ConstructedInterpolants, 0 QuantifiedInterpolants, 4627 SizeOfPredicates, 0 NumberOfNonLiveVariables, 365 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 608/666 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:12:30,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dc2cf90-b290-48a8-ad08-6c7067b117d6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...