./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label55.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_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/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_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/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_9f589425-f1f1-43a2-952b-cfb30013dbca/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 eb1378ae256d4f0b4a7126643513eaf232a83d7c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:41:22,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:41:22,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:41:22,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:41:22,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:41:22,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:41:22,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:41:22,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:41:22,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:41:22,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:41:22,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:41:22,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:41:22,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:41:22,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:41:22,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:41:22,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:41:22,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:41:22,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:41:22,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:41:22,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:41:22,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:41:22,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:41:22,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:41:22,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:41:22,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:41:22,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:41:22,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:41:22,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:41:22,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:41:22,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:41:22,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:41:22,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:41:22,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:41:22,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:41:22,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:41:22,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:41:22,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:41:22,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:41:22,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:41:22,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:41:22,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:41:22,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:41:22,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:41:22,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:41:22,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:41:22,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:41:22,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:41:22,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:41:22,811 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:41:22,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:41:22,812 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:41:22,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:41:22,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:41:22,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:41:22,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:41:22,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:41:22,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:41:22,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:41:22,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:41:22,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:41:22,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:41:22,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:41:22,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:41:22,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:41:22,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:41:22,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:41:22,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:41:22,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:41:22,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:41:22,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:41:22,816 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:41:22,816 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:41:22,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:41:22,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:41:22,817 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_9f589425-f1f1-43a2-952b-cfb30013dbca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1378ae256d4f0b4a7126643513eaf232a83d7c [2021-10-15 19:41:23,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:41:23,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:41:23,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:41:23,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:41:23,116 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:41:23,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem02_label55.c [2021-10-15 19:41:23,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/data/77cfb3e61/242b2840c3e64390b1cc625af73a5c8c/FLAG38b4ff7d3 [2021-10-15 19:41:23,723 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:41:23,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/sv-benchmarks/c/eca-rers2012/Problem02_label55.c [2021-10-15 19:41:23,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/data/77cfb3e61/242b2840c3e64390b1cc625af73a5c8c/FLAG38b4ff7d3 [2021-10-15 19:41:24,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/data/77cfb3e61/242b2840c3e64390b1cc625af73a5c8c [2021-10-15 19:41:24,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:41:24,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:41:24,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:41:24,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:41:24,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:41:24,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44162ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24, skipping insertion in model container [2021-10-15 19:41:24,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:41:24,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:41:24,513 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_9f589425-f1f1-43a2-952b-cfb30013dbca/sv-benchmarks/c/eca-rers2012/Problem02_label55.c[17358,17371] [2021-10-15 19:41:24,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:41:24,580 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:41:24,689 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_9f589425-f1f1-43a2-952b-cfb30013dbca/sv-benchmarks/c/eca-rers2012/Problem02_label55.c[17358,17371] [2021-10-15 19:41:24,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:41:24,717 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:41:24,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24 WrapperNode [2021-10-15 19:41:24,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:41:24,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:41:24,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:41:24,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:41:24,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:41:24,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:41:24,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:41:24,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:41:24,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:41:24,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:41:24,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:41:24,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:41:24,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (1/1) ... [2021-10-15 19:41:24,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:41:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:24,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:41:25,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:41:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:41:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:41:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:41:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:41:26,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:41:26,085 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:41:26,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:26 BoogieIcfgContainer [2021-10-15 19:41:26,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:41:26,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:41:26,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:41:26,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:41:26,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:41:24" (1/3) ... [2021-10-15 19:41:26,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1605a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:41:26, skipping insertion in model container [2021-10-15 19:41:26,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:24" (2/3) ... [2021-10-15 19:41:26,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1605a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:41:26, skipping insertion in model container [2021-10-15 19:41:26,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:26" (3/3) ... [2021-10-15 19:41:26,100 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label55.c [2021-10-15 19:41:26,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:41:26,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:41:26,156 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:41:26,163 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 19:41:26,163 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:41:26,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:41:26,276 INFO L129 PetriNetUnfolder]: 149/375 cut-off events. [2021-10-15 19:41:26,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:26,278 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 19:41:26,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 375 transitions, 750 flow [2021-10-15 19:41:26,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 370 transitions, 740 flow [2021-10-15 19:41:26,324 INFO L129 PetriNetUnfolder]: 111/262 cut-off events. [2021-10-15 19:41:26,324 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:26,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:26,325 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] [2021-10-15 19:41:26,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash -673842037, now seen corresponding path program 1 times [2021-10-15 19:41:26,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:26,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570762533] [2021-10-15 19:41:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:26,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:26,717 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 19:41:26,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:26,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570762533] [2021-10-15 19:41:26,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570762533] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:26,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:26,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:41:26,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28684919] [2021-10-15 19:41:26,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:26,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:26,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:26,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:41:26,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 370 transitions, 740 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:26,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:26,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:41:26,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:27,659 INFO L129 PetriNetUnfolder]: 152/559 cut-off events. [2021-10-15 19:41:27,661 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:27,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 559 events. 152/559 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 971 event pairs, 0 based on Foata normal form. 91/426 useless extension candidates. Maximal degree in co-relation 3. Up to 286 conditions per place. [2021-10-15 19:41:27,671 INFO L132 encePairwiseOnDemand]: 214/375 looper letters, 361 selfloop transitions, 55 changer transitions 90/537 dead transitions. [2021-10-15 19:41:27,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 537 transitions, 2086 flow [2021-10-15 19:41:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2021-10-15 19:41:27,696 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6648888888888889 [2021-10-15 19:41:27,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2021-10-15 19:41:27,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2021-10-15 19:41:27,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:27,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2021-10-15 19:41:27,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:27,719 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 19:41:27,721 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 19:41:27,723 INFO L186 Difference]: Start difference. First operand has 224 places, 370 transitions, 740 flow. Second operand 3 states and 748 transitions. [2021-10-15 19:41:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 537 transitions, 2086 flow [2021-10-15 19:41:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 537 transitions, 2086 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:27,771 INFO L242 Difference]: Finished difference. Result has 228 places, 299 transitions, 948 flow [2021-10-15 19:41:27,774 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=948, PETRI_PLACES=228, PETRI_TRANSITIONS=299} [2021-10-15 19:41:27,775 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, 4 predicate places. [2021-10-15 19:41:27,775 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 299 transitions, 948 flow [2021-10-15 19:41:27,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:27,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:27,777 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:41:27,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:41:27,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:27,778 INFO L82 PathProgramCache]: Analyzing trace with hash -530640512, now seen corresponding path program 1 times [2021-10-15 19:41:27,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:27,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843773978] [2021-10-15 19:41:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:27,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:28,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:28,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843773978] [2021-10-15 19:41:28,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843773978] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:28,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:28,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:28,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080995404] [2021-10-15 19:41:28,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:41:28,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:41:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:41:28,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 375 [2021-10-15 19:41:28,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 299 transitions, 948 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:28,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:28,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 375 [2021-10-15 19:41:28,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:29,174 INFO L129 PetriNetUnfolder]: 211/893 cut-off events. [2021-10-15 19:41:29,175 INFO L130 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2021-10-15 19:41:29,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 893 events. 211/893 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2423 event pairs, 0 based on Foata normal form. 106/926 useless extension candidates. Maximal degree in co-relation 703. Up to 399 conditions per place. [2021-10-15 19:41:29,182 INFO L132 encePairwiseOnDemand]: 295/375 looper letters, 387 selfloop transitions, 76 changer transitions 85/564 dead transitions. [2021-10-15 19:41:29,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 564 transitions, 2690 flow [2021-10-15 19:41:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:41:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:41:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2021-10-15 19:41:29,202 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45066666666666666 [2021-10-15 19:41:29,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2021-10-15 19:41:29,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2021-10-15 19:41:29,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:29,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2021-10-15 19:41:29,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,213 INFO L186 Difference]: Start difference. First operand has 228 places, 299 transitions, 948 flow. Second operand 4 states and 676 transitions. [2021-10-15 19:41:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 564 transitions, 2690 flow [2021-10-15 19:41:29,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 564 transitions, 2544 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:29,258 INFO L242 Difference]: Finished difference. Result has 172 places, 343 transitions, 1590 flow [2021-10-15 19:41:29,266 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1590, PETRI_PLACES=172, PETRI_TRANSITIONS=343} [2021-10-15 19:41:29,267 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -52 predicate places. [2021-10-15 19:41:29,267 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 343 transitions, 1590 flow [2021-10-15 19:41:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:29,268 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-15 19:41:29,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:41:29,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:29,270 INFO L82 PathProgramCache]: Analyzing trace with hash 507533875, now seen corresponding path program 1 times [2021-10-15 19:41:29,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:29,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703738945] [2021-10-15 19:41:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:29,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:41:29,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:29,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703738945] [2021-10-15 19:41:29,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703738945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:29,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:29,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:41:29,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001751489] [2021-10-15 19:41:29,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:29,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:29,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:29,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:29,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:41:29,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 343 transitions, 1590 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:29,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:41:29,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:30,247 INFO L129 PetriNetUnfolder]: 249/1415 cut-off events. [2021-10-15 19:41:30,248 INFO L130 PetriNetUnfolder]: For 778/778 co-relation queries the response was YES. [2021-10-15 19:41:30,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3411 conditions, 1415 events. 249/1415 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5590 event pairs, 0 based on Foata normal form. 150/1554 useless extension candidates. Maximal degree in co-relation 1456. Up to 758 conditions per place. [2021-10-15 19:41:30,258 INFO L132 encePairwiseOnDemand]: 294/375 looper letters, 427 selfloop transitions, 73 changer transitions 0/521 dead transitions. [2021-10-15 19:41:30,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 521 transitions, 3136 flow [2021-10-15 19:41:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2021-10-15 19:41:30,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45511111111111113 [2021-10-15 19:41:30,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2021-10-15 19:41:30,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2021-10-15 19:41:30,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:30,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2021-10-15 19:41:30,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,268 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 19:41:30,269 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 19:41:30,270 INFO L186 Difference]: Start difference. First operand has 172 places, 343 transitions, 1590 flow. Second operand 3 states and 512 transitions. [2021-10-15 19:41:30,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 521 transitions, 3136 flow [2021-10-15 19:41:30,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 521 transitions, 2810 flow, removed 73 selfloop flow, removed 3 redundant places. [2021-10-15 19:41:30,316 INFO L242 Difference]: Finished difference. Result has 172 places, 382 transitions, 2094 flow [2021-10-15 19:41:30,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2094, PETRI_PLACES=172, PETRI_TRANSITIONS=382} [2021-10-15 19:41:30,317 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -52 predicate places. [2021-10-15 19:41:30,317 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 382 transitions, 2094 flow [2021-10-15 19:41:30,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:30,318 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-15 19:41:30,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:41:30,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 783324177, now seen corresponding path program 1 times [2021-10-15 19:41:30,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:30,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512587673] [2021-10-15 19:41:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:30,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:41:30,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512587673] [2021-10-15 19:41:30,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512587673] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:30,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:30,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:30,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201770522] [2021-10-15 19:41:30,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:30,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:30,396 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 375 [2021-10-15 19:41:30,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 382 transitions, 2094 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:30,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 375 [2021-10-15 19:41:30,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:31,254 INFO L129 PetriNetUnfolder]: 249/1836 cut-off events. [2021-10-15 19:41:31,254 INFO L130 PetriNetUnfolder]: For 1171/1171 co-relation queries the response was YES. [2021-10-15 19:41:31,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 1836 events. 249/1836 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9087 event pairs, 0 based on Foata normal form. 147/1973 useless extension candidates. Maximal degree in co-relation 1298. Up to 1303 conditions per place. [2021-10-15 19:41:31,266 INFO L132 encePairwiseOnDemand]: 296/375 looper letters, 308 selfloop transitions, 0 changer transitions 179/518 dead transitions. [2021-10-15 19:41:31,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 518 transitions, 3336 flow [2021-10-15 19:41:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2021-10-15 19:41:31,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46044444444444443 [2021-10-15 19:41:31,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2021-10-15 19:41:31,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2021-10-15 19:41:31,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:31,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2021-10-15 19:41:31,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,276 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 19:41:31,277 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 19:41:31,277 INFO L186 Difference]: Start difference. First operand has 172 places, 382 transitions, 2094 flow. Second operand 3 states and 518 transitions. [2021-10-15 19:41:31,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 518 transitions, 3336 flow [2021-10-15 19:41:31,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 518 transitions, 3190 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:31,298 INFO L242 Difference]: Finished difference. Result has 173 places, 339 transitions, 1866 flow [2021-10-15 19:41:31,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1866, PETRI_PLACES=173, PETRI_TRANSITIONS=339} [2021-10-15 19:41:31,300 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -51 predicate places. [2021-10-15 19:41:31,300 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 339 transitions, 1866 flow [2021-10-15 19:41:31,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:31,301 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:41:31,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:41:31,302 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:31,302 INFO L82 PathProgramCache]: Analyzing trace with hash 427491692, now seen corresponding path program 1 times [2021-10-15 19:41:31,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:31,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552126636] [2021-10-15 19:41:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:31,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:31,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552126636] [2021-10-15 19:41:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552126636] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:31,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:31,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:31,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528667389] [2021-10-15 19:41:31,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:31,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:31,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:41:31,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 339 transitions, 1866 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:31,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:41:31,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:32,219 INFO L129 PetriNetUnfolder]: 226/1803 cut-off events. [2021-10-15 19:41:32,220 INFO L130 PetriNetUnfolder]: For 1118/1118 co-relation queries the response was YES. [2021-10-15 19:41:32,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4291 conditions, 1803 events. 226/1803 cut-off events. For 1118/1118 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8641 event pairs, 0 based on Foata normal form. 81/1879 useless extension candidates. Maximal degree in co-relation 4284. Up to 1301 conditions per place. [2021-10-15 19:41:32,231 INFO L132 encePairwiseOnDemand]: 317/375 looper letters, 439 selfloop transitions, 35 changer transitions 0/493 dead transitions. [2021-10-15 19:41:32,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 493 transitions, 3232 flow [2021-10-15 19:41:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2021-10-15 19:41:32,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41955555555555557 [2021-10-15 19:41:32,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2021-10-15 19:41:32,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2021-10-15 19:41:32,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:32,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2021-10-15 19:41:32,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,242 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 19:41:32,244 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 19:41:32,244 INFO L186 Difference]: Start difference. First operand has 173 places, 339 transitions, 1866 flow. Second operand 3 states and 472 transitions. [2021-10-15 19:41:32,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 493 transitions, 3232 flow [2021-10-15 19:41:32,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 493 transitions, 3016 flow, removed 108 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:32,267 INFO L242 Difference]: Finished difference. Result has 171 places, 356 transitions, 2100 flow [2021-10-15 19:41:32,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2100, PETRI_PLACES=171, PETRI_TRANSITIONS=356} [2021-10-15 19:41:32,268 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -53 predicate places. [2021-10-15 19:41:32,268 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 356 transitions, 2100 flow [2021-10-15 19:41:32,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:32,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:41:32,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:41:32,270 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2115525110, now seen corresponding path program 1 times [2021-10-15 19:41:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:32,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876174520] [2021-10-15 19:41:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:32,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:32,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876174520] [2021-10-15 19:41:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876174520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:32,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655698547] [2021-10-15 19:41:32,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:32,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:32,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:41:32,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 356 transitions, 2100 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:32,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:41:32,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:33,288 INFO L129 PetriNetUnfolder]: 318/2319 cut-off events. [2021-10-15 19:41:33,288 INFO L130 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2021-10-15 19:41:33,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5684 conditions, 2319 events. 318/2319 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12270 event pairs, 0 based on Foata normal form. 50/2364 useless extension candidates. Maximal degree in co-relation 5676. Up to 1178 conditions per place. [2021-10-15 19:41:33,304 INFO L132 encePairwiseOnDemand]: 306/375 looper letters, 418 selfloop transitions, 138 changer transitions 0/575 dead transitions. [2021-10-15 19:41:33,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 575 transitions, 4210 flow [2021-10-15 19:41:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2021-10-15 19:41:33,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42577777777777776 [2021-10-15 19:41:33,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2021-10-15 19:41:33,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2021-10-15 19:41:33,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:33,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2021-10-15 19:41:33,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,315 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 19:41:33,316 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 19:41:33,316 INFO L186 Difference]: Start difference. First operand has 171 places, 356 transitions, 2100 flow. Second operand 3 states and 479 transitions. [2021-10-15 19:41:33,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 575 transitions, 4210 flow [2021-10-15 19:41:33,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 575 transitions, 4128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:33,363 INFO L242 Difference]: Finished difference. Result has 173 places, 437 transitions, 3484 flow [2021-10-15 19:41:33,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3484, PETRI_PLACES=173, PETRI_TRANSITIONS=437} [2021-10-15 19:41:33,365 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -51 predicate places. [2021-10-15 19:41:33,365 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 437 transitions, 3484 flow [2021-10-15 19:41:33,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:33,366 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:41:33,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:41:33,367 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2076121195, now seen corresponding path program 1 times [2021-10-15 19:41:33,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:33,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676731135] [2021-10-15 19:41:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:33,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:33,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:33,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676731135] [2021-10-15 19:41:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676731135] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:33,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:33,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158605204] [2021-10-15 19:41:33,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:33,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:33,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 375 [2021-10-15 19:41:33,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 437 transitions, 3484 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:33,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 375 [2021-10-15 19:41:33,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:34,468 INFO L129 PetriNetUnfolder]: 245/2241 cut-off events. [2021-10-15 19:41:34,468 INFO L130 PetriNetUnfolder]: For 2993/2993 co-relation queries the response was YES. [2021-10-15 19:41:34,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5458 conditions, 2241 events. 245/2241 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 11985 event pairs, 0 based on Foata normal form. 71/2310 useless extension candidates. Maximal degree in co-relation 5449. Up to 1020 conditions per place. [2021-10-15 19:41:34,481 INFO L132 encePairwiseOnDemand]: 322/375 looper letters, 394 selfloop transitions, 94 changer transitions 14/531 dead transitions. [2021-10-15 19:41:34,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 531 transitions, 4372 flow [2021-10-15 19:41:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2021-10-15 19:41:34,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2021-10-15 19:41:34,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2021-10-15 19:41:34,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2021-10-15 19:41:34,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:34,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2021-10-15 19:41:34,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,494 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 19:41:34,495 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 19:41:34,495 INFO L186 Difference]: Start difference. First operand has 173 places, 437 transitions, 3484 flow. Second operand 3 states and 480 transitions. [2021-10-15 19:41:34,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 531 transitions, 4372 flow [2021-10-15 19:41:34,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 531 transitions, 4138 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:34,524 INFO L242 Difference]: Finished difference. Result has 173 places, 385 transitions, 3034 flow [2021-10-15 19:41:34,525 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3034, PETRI_PLACES=173, PETRI_TRANSITIONS=385} [2021-10-15 19:41:34,525 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -51 predicate places. [2021-10-15 19:41:34,532 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 385 transitions, 3034 flow [2021-10-15 19:41:34,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,532 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:34,533 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:34,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:41:34,533 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1889614486, now seen corresponding path program 1 times [2021-10-15 19:41:34,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:34,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428235716] [2021-10-15 19:41:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:34,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-15 19:41:34,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:34,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428235716] [2021-10-15 19:41:34,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428235716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:34,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:34,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:34,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845158983] [2021-10-15 19:41:34,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:34,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:34,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 375 [2021-10-15 19:41:34,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 385 transitions, 3034 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:34,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 375 [2021-10-15 19:41:34,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:35,483 INFO L129 PetriNetUnfolder]: 207/2062 cut-off events. [2021-10-15 19:41:35,483 INFO L130 PetriNetUnfolder]: For 2318/2318 co-relation queries the response was YES. [2021-10-15 19:41:35,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5113 conditions, 2062 events. 207/2062 cut-off events. For 2318/2318 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10007 event pairs, 0 based on Foata normal form. 25/2087 useless extension candidates. Maximal degree in co-relation 5103. Up to 1563 conditions per place. [2021-10-15 19:41:35,496 INFO L132 encePairwiseOnDemand]: 359/375 looper letters, 454 selfloop transitions, 26 changer transitions 0/497 dead transitions. [2021-10-15 19:41:35,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 497 transitions, 3955 flow [2021-10-15 19:41:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 19:41:35,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3751111111111111 [2021-10-15 19:41:35,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 19:41:35,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 19:41:35,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:35,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 19:41:35,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,504 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 19:41:35,505 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 19:41:35,505 INFO L186 Difference]: Start difference. First operand has 173 places, 385 transitions, 3034 flow. Second operand 3 states and 422 transitions. [2021-10-15 19:41:35,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 497 transitions, 3955 flow [2021-10-15 19:41:35,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 497 transitions, 3872 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:35,529 INFO L242 Difference]: Finished difference. Result has 173 places, 360 transitions, 2684 flow [2021-10-15 19:41:35,529 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2684, PETRI_PLACES=173, PETRI_TRANSITIONS=360} [2021-10-15 19:41:35,530 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -51 predicate places. [2021-10-15 19:41:35,530 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 360 transitions, 2684 flow [2021-10-15 19:41:35,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,530 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:35,531 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:35,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:41:35,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash 314010913, now seen corresponding path program 1 times [2021-10-15 19:41:35,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:35,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803964582] [2021-10-15 19:41:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:35,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-15 19:41:35,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:35,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803964582] [2021-10-15 19:41:35,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803964582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:35,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:35,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:35,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167574090] [2021-10-15 19:41:35,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:35,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:35,656 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 375 [2021-10-15 19:41:35,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 360 transitions, 2684 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:35,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 375 [2021-10-15 19:41:35,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:36,729 INFO L129 PetriNetUnfolder]: 203/2609 cut-off events. [2021-10-15 19:41:36,729 INFO L130 PetriNetUnfolder]: For 2279/2279 co-relation queries the response was YES. [2021-10-15 19:41:36,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6139 conditions, 2609 events. 203/2609 cut-off events. For 2279/2279 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13792 event pairs, 0 based on Foata normal form. 41/2650 useless extension candidates. Maximal degree in co-relation 6129. Up to 1948 conditions per place. [2021-10-15 19:41:36,738 INFO L132 encePairwiseOnDemand]: 332/375 looper letters, 0 selfloop transitions, 0 changer transitions 487/487 dead transitions. [2021-10-15 19:41:36,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 487 transitions, 3822 flow [2021-10-15 19:41:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2021-10-15 19:41:36,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39111111111111113 [2021-10-15 19:41:36,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2021-10-15 19:41:36,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2021-10-15 19:41:36,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:36,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2021-10-15 19:41:36,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:36,748 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 19:41:36,749 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 19:41:36,749 INFO L186 Difference]: Start difference. First operand has 173 places, 360 transitions, 2684 flow. Second operand 3 states and 440 transitions. [2021-10-15 19:41:36,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 487 transitions, 3822 flow [2021-10-15 19:41:36,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 487 transitions, 3798 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:36,768 INFO L242 Difference]: Finished difference. Result has 170 places, 0 transitions, 0 flow [2021-10-15 19:41:36,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=170, PETRI_TRANSITIONS=0} [2021-10-15 19:41:36,768 INFO L334 CegarLoopForPetriNet]: 224 programPoint places, -54 predicate places. [2021-10-15 19:41:36,769 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 0 transitions, 0 flow [2021-10-15 19:41:36,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:36,772 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:41:36,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:41:36,778 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:41:36,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:41:36 BoogieIcfgContainer [2021-10-15 19:41:36,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:41:36,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:41:36,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:41:36,789 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:41:36,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:26" (3/4) ... [2021-10-15 19:41:36,793 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:41:36,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:41:36,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:41:36,826 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:41:36,828 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:41:37,007 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:41:37,007 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:41:37,009 INFO L168 Benchmark]: Toolchain (without parser) took 13003.18 ms. Allocated memory was 109.1 MB in the beginning and 268.4 MB in the end (delta: 159.4 MB). Free memory was 78.8 MB in the beginning and 227.2 MB in the end (delta: -148.4 MB). Peak memory consumption was 159.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,009 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory is still 68.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:41:37,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 705.32 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 78.6 MB in the beginning and 91.3 MB in the end (delta: -12.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 106.26 ms. Allocated memory is still 132.1 MB. Free memory was 91.3 MB in the beginning and 85.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,011 INFO L168 Benchmark]: Boogie Preprocessor took 84.29 ms. Allocated memory is still 132.1 MB. Free memory was 85.8 MB in the beginning and 81.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,011 INFO L168 Benchmark]: RCFGBuilder took 1173.94 ms. Allocated memory is still 132.1 MB. Free memory was 81.5 MB in the beginning and 101.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,012 INFO L168 Benchmark]: TraceAbstraction took 10696.75 ms. Allocated memory was 132.1 MB in the beginning and 268.4 MB in the end (delta: 136.3 MB). Free memory was 100.3 MB in the beginning and 85.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 151.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,014 INFO L168 Benchmark]: Witness Printer took 218.50 ms. Allocated memory is still 268.4 MB. Free memory was 85.4 MB in the beginning and 227.2 MB in the end (delta: -141.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:37,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory is still 68.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 705.32 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 78.6 MB in the beginning and 91.3 MB in the end (delta: -12.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 106.26 ms. Allocated memory is still 132.1 MB. Free memory was 91.3 MB in the beginning and 85.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 84.29 ms. Allocated memory is still 132.1 MB. Free memory was 85.8 MB in the beginning and 81.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1173.94 ms. Allocated memory is still 132.1 MB. Free memory was 81.5 MB in the beginning and 101.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10696.75 ms. Allocated memory was 132.1 MB in the beginning and 268.4 MB in the end (delta: 136.3 MB). Free memory was 100.3 MB in the beginning and 85.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 151.6 MB. Max. memory is 16.1 GB. * Witness Printer took 218.50 ms. Allocated memory is still 268.4 MB. Free memory was 85.4 MB in the beginning and 227.2 MB in the end (delta: -141.8 MB). Peak memory consumption was 7.1 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: 497]: 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: 32.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10625.9ms, OverallIterations: 9, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 9051.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 127.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1057 SDtfs, 1043 SDslu, 3 SDs, 0 SdLazy, 3493 SolverSat, 627 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3405.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3484occurred in iteration=6, InterpolantAutomatonStates: 28, 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: 84.5ms SsaConstructionTime, 265.3ms SatisfiabilityAnalysisTime, 839.5ms InterpolantComputationTime, 1354 NumberOfCodeBlocks, 1354 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 1345 ConstructedInterpolants, 0 QuantifiedInterpolants, 3858 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 571/571 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 19:41:37,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f589425-f1f1-43a2-952b-cfb30013dbca/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...