./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label07.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_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/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_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/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_b465781d-3c8f-4cd5-bfa5-418311e04cfe/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 42e771c9087339edfe48c6fa50d83cff938a7802 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:42:24,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:42:24,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:42:24,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:42:24,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:42:24,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:42:24,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:42:24,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:42:24,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:42:24,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:42:24,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:42:24,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:42:24,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:42:24,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:42:24,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:42:25,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:42:25,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:42:25,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:42:25,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:42:25,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:42:25,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:42:25,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:42:25,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:42:25,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:42:25,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:42:25,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:42:25,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:42:25,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:42:25,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:42:25,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:42:25,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:42:25,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:42:25,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:42:25,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:42:25,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:42:25,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:42:25,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:42:25,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:42:25,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:42:25,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:42:25,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:42:25,062 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:42:25,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:42:25,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:42:25,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:42:25,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:42:25,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:42:25,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:42:25,139 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:42:25,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:42:25,140 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:42:25,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:42:25,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:42:25,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:42:25,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:42:25,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:42:25,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:42:25,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:42:25,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:42:25,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:42:25,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:42:25,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:42:25,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:42:25,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:42:25,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:25,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:42:25,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:42:25,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:42:25,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:42:25,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:42:25,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:42:25,148 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:42:25,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:42:25,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:42:25,149 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_b465781d-3c8f-4cd5-bfa5-418311e04cfe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42e771c9087339edfe48c6fa50d83cff938a7802 [2021-10-15 19:42:25,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:42:25,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:42:25,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:42:25,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:42:25,623 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:42:25,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label07.c [2021-10-15 19:42:25,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/data/353963e03/1aa4a6cf8e914142969e85d2bcc4e1b1/FLAG35dc7f374 [2021-10-15 19:42:26,612 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:42:26,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/sv-benchmarks/c/eca-rers2012/Problem14_label07.c [2021-10-15 19:42:26,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/data/353963e03/1aa4a6cf8e914142969e85d2bcc4e1b1/FLAG35dc7f374 [2021-10-15 19:42:26,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/data/353963e03/1aa4a6cf8e914142969e85d2bcc4e1b1 [2021-10-15 19:42:26,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:42:26,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:42:26,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:26,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:42:26,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:42:26,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:26" (1/1) ... [2021-10-15 19:42:26,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@206554d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:26, skipping insertion in model container [2021-10-15 19:42:26,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:26" (1/1) ... [2021-10-15 19:42:26,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:42:26,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:42:27,067 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_b465781d-3c8f-4cd5-bfa5-418311e04cfe/sv-benchmarks/c/eca-rers2012/Problem14_label07.c[4912,4925] [2021-10-15 19:42:27,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:42:27,421 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:42:27,468 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_b465781d-3c8f-4cd5-bfa5-418311e04cfe/sv-benchmarks/c/eca-rers2012/Problem14_label07.c[4912,4925] [2021-10-15 19:42:27,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:42:27,674 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:42:27,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27 WrapperNode [2021-10-15 19:42:27,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:27,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:42:27,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:42:27,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:42:27,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:42:27,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:42:27,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:42:27,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:42:27,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:42:27,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:42:27,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:42:27,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:42:27,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (1/1) ... [2021-10-15 19:42:27,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:28,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:28,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:42:28,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:42:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:42:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:42:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:42:28,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:42:29,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:42:29,921 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:42:29,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:29 BoogieIcfgContainer [2021-10-15 19:42:29,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:42:29,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:42:29,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:42:29,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:42:29,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:42:26" (1/3) ... [2021-10-15 19:42:29,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e097f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:42:29, skipping insertion in model container [2021-10-15 19:42:29,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:27" (2/3) ... [2021-10-15 19:42:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e097f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:42:29, skipping insertion in model container [2021-10-15 19:42:29,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:29" (3/3) ... [2021-10-15 19:42:29,936 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label07.c [2021-10-15 19:42:29,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:42:29,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:42:30,006 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:42:30,014 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 19:42:30,014 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:42:30,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 19:42:30,186 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 19:42:30,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:30,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 422 events. 178/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 249 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-10-15 19:42:30,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 19:42:30,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 19:42:30,220 INFO L129 PetriNetUnfolder]: 43/133 cut-off events. [2021-10-15 19:42:30,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:30,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:30,222 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] [2021-10-15 19:42:30,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2021-10-15 19:42:30,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:30,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673567286] [2021-10-15 19:42:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:30,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:30,753 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 19:42:30,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:30,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673567286] [2021-10-15 19:42:30,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673567286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:30,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:30,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:30,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833758424] [2021-10-15 19:42:30,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:30,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:30,804 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:30,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:30,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:30,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:30,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:32,321 INFO L129 PetriNetUnfolder]: 230/649 cut-off events. [2021-10-15 19:42:32,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:32,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 649 events. 230/649 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 701 event pairs, 0 based on Foata normal form. 61/420 useless extension candidates. Maximal degree in co-relation 1. Up to 416 conditions per place. [2021-10-15 19:42:32,333 INFO L132 encePairwiseOnDemand]: 185/422 looper letters, 465 selfloop transitions, 115 changer transitions 61/646 dead transitions. [2021-10-15 19:42:32,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 646 transitions, 2574 flow [2021-10-15 19:42:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2021-10-15 19:42:32,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6208530805687204 [2021-10-15 19:42:32,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2021-10-15 19:42:32,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2021-10-15 19:42:32,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:32,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2021-10-15 19:42:32,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:32,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:32,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:32,393 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 3 states and 786 transitions. [2021-10-15 19:42:32,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 646 transitions, 2574 flow [2021-10-15 19:42:32,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 646 transitions, 2574 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:42:32,428 INFO L242 Difference]: Finished difference. Result has 246 places, 410 transitions, 1510 flow [2021-10-15 19:42:32,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1510, PETRI_PLACES=246, PETRI_TRANSITIONS=410} [2021-10-15 19:42:32,433 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 4 predicate places. [2021-10-15 19:42:32,433 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 410 transitions, 1510 flow [2021-10-15 19:42:32,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:32,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:32,435 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 19:42:32,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:42:32,436 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1967938748, now seen corresponding path program 1 times [2021-10-15 19:42:32,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:32,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49556186] [2021-10-15 19:42:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:32,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:32,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:32,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49556186] [2021-10-15 19:42:32,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49556186] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:32,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468575668] [2021-10-15 19:42:32,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:32,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:32,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:32,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:32,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 410 transitions, 1510 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:32,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:32,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:32,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:34,123 INFO L129 PetriNetUnfolder]: 301/1016 cut-off events. [2021-10-15 19:42:34,123 INFO L130 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2021-10-15 19:42:34,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1016 events. 301/1016 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1797 event pairs, 0 based on Foata normal form. 157/1173 useless extension candidates. Maximal degree in co-relation 800. Up to 510 conditions per place. [2021-10-15 19:42:34,137 INFO L132 encePairwiseOnDemand]: 328/422 looper letters, 553 selfloop transitions, 99 changer transitions 0/657 dead transitions. [2021-10-15 19:42:34,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 657 transitions, 3524 flow [2021-10-15 19:42:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2021-10-15 19:42:34,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47788309636650866 [2021-10-15 19:42:34,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2021-10-15 19:42:34,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2021-10-15 19:42:34,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:34,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2021-10-15 19:42:34,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:34,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:34,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:34,160 INFO L186 Difference]: Start difference. First operand has 246 places, 410 transitions, 1510 flow. Second operand 3 states and 605 transitions. [2021-10-15 19:42:34,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 657 transitions, 3524 flow [2021-10-15 19:42:34,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 657 transitions, 3222 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:34,217 INFO L242 Difference]: Finished difference. Result has 188 places, 438 transitions, 2018 flow [2021-10-15 19:42:34,218 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2018, PETRI_PLACES=188, PETRI_TRANSITIONS=438} [2021-10-15 19:42:34,219 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -54 predicate places. [2021-10-15 19:42:34,219 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 438 transitions, 2018 flow [2021-10-15 19:42:34,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:34,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:34,221 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:34,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:42:34,222 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1697201153, now seen corresponding path program 1 times [2021-10-15 19:42:34,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:34,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613999402] [2021-10-15 19:42:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:34,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:34,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:34,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613999402] [2021-10-15 19:42:34,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613999402] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:34,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:34,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:34,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347047318] [2021-10-15 19:42:34,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:42:34,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:42:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:42:34,480 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:34,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 438 transitions, 2018 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:34,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:34,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:34,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:36,638 INFO L129 PetriNetUnfolder]: 361/1610 cut-off events. [2021-10-15 19:42:36,638 INFO L130 PetriNetUnfolder]: For 493/493 co-relation queries the response was YES. [2021-10-15 19:42:36,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3897 conditions, 1610 events. 361/1610 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2828 event pairs, 0 based on Foata normal form. 48/1658 useless extension candidates. Maximal degree in co-relation 2129. Up to 1053 conditions per place. [2021-10-15 19:42:36,653 INFO L132 encePairwiseOnDemand]: 385/422 looper letters, 781 selfloop transitions, 62 changer transitions 0/848 dead transitions. [2021-10-15 19:42:36,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 848 transitions, 4684 flow [2021-10-15 19:42:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:42:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:42:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2021-10-15 19:42:36,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44135071090047395 [2021-10-15 19:42:36,672 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2021-10-15 19:42:36,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2021-10-15 19:42:36,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:36,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2021-10-15 19:42:36,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:36,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:36,704 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:36,705 INFO L186 Difference]: Start difference. First operand has 188 places, 438 transitions, 2018 flow. Second operand 4 states and 745 transitions. [2021-10-15 19:42:36,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 848 transitions, 4684 flow [2021-10-15 19:42:36,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 848 transitions, 4476 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:36,792 INFO L242 Difference]: Finished difference. Result has 191 places, 495 transitions, 2448 flow [2021-10-15 19:42:36,793 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2448, PETRI_PLACES=191, PETRI_TRANSITIONS=495} [2021-10-15 19:42:36,793 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -51 predicate places. [2021-10-15 19:42:36,793 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 495 transitions, 2448 flow [2021-10-15 19:42:36,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:36,794 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:36,795 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:36,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:42:36,795 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:36,811 INFO L82 PathProgramCache]: Analyzing trace with hash 18940108, now seen corresponding path program 1 times [2021-10-15 19:42:36,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:36,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780929124] [2021-10-15 19:42:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:36,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:42:37,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:37,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780929124] [2021-10-15 19:42:37,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780929124] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:37,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:37,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:37,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163338151] [2021-10-15 19:42:37,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:42:37,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:37,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:42:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:42:37,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:37,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 495 transitions, 2448 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:37,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:37,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:37,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:39,109 INFO L129 PetriNetUnfolder]: 420/2054 cut-off events. [2021-10-15 19:42:39,109 INFO L130 PetriNetUnfolder]: For 729/729 co-relation queries the response was YES. [2021-10-15 19:42:39,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5091 conditions, 2054 events. 420/2054 cut-off events. For 729/729 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 4416 event pairs, 0 based on Foata normal form. 13/2067 useless extension candidates. Maximal degree in co-relation 3508. Up to 919 conditions per place. [2021-10-15 19:42:39,124 INFO L132 encePairwiseOnDemand]: 351/422 looper letters, 519 selfloop transitions, 18 changer transitions 213/755 dead transitions. [2021-10-15 19:42:39,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 755 transitions, 4772 flow [2021-10-15 19:42:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:42:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:42:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2021-10-15 19:42:39,130 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33175355450236965 [2021-10-15 19:42:39,130 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2021-10-15 19:42:39,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2021-10-15 19:42:39,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:39,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2021-10-15 19:42:39,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:39,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:39,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:39,143 INFO L186 Difference]: Start difference. First operand has 191 places, 495 transitions, 2448 flow. Second operand 4 states and 560 transitions. [2021-10-15 19:42:39,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 755 transitions, 4772 flow [2021-10-15 19:42:39,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 755 transitions, 4752 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-10-15 19:42:39,196 INFO L242 Difference]: Finished difference. Result has 196 places, 363 transitions, 1740 flow [2021-10-15 19:42:39,197 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1740, PETRI_PLACES=196, PETRI_TRANSITIONS=363} [2021-10-15 19:42:39,197 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -46 predicate places. [2021-10-15 19:42:39,198 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 363 transitions, 1740 flow [2021-10-15 19:42:39,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:39,198 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:39,199 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:42:39,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:42:39,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash 721063632, now seen corresponding path program 1 times [2021-10-15 19:42:39,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:39,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240068051] [2021-10-15 19:42:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:39,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 89 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:39,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:39,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240068051] [2021-10-15 19:42:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240068051] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:39,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559440043] [2021-10-15 19:42:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:39,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:39,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:39,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:42:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:42:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-15 19:42:40,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559440043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:40,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:42:40,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:42:40,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960655671] [2021-10-15 19:42:40,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:40,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:42:40,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:40,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 363 transitions, 1740 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:40,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:40,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:40,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:42,070 INFO L129 PetriNetUnfolder]: 295/2256 cut-off events. [2021-10-15 19:42:42,071 INFO L130 PetriNetUnfolder]: For 988/988 co-relation queries the response was YES. [2021-10-15 19:42:42,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5332 conditions, 2256 events. 295/2256 cut-off events. For 988/988 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 6567 event pairs, 0 based on Foata normal form. 89/2345 useless extension candidates. Maximal degree in co-relation 3993. Up to 1729 conditions per place. [2021-10-15 19:42:42,089 INFO L132 encePairwiseOnDemand]: 348/422 looper letters, 507 selfloop transitions, 88 changer transitions 0/600 dead transitions. [2021-10-15 19:42:42,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 600 transitions, 3764 flow [2021-10-15 19:42:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 19:42:42,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 19:42:42,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 19:42:42,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 19:42:42,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:42,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 19:42:42,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:42,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:42,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:42,105 INFO L186 Difference]: Start difference. First operand has 196 places, 363 transitions, 1740 flow. Second operand 3 states and 527 transitions. [2021-10-15 19:42:42,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 600 transitions, 3764 flow [2021-10-15 19:42:42,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 600 transitions, 3698 flow, removed 23 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:42,189 INFO L242 Difference]: Finished difference. Result has 197 places, 419 transitions, 2734 flow [2021-10-15 19:42:42,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2734, PETRI_PLACES=197, PETRI_TRANSITIONS=419} [2021-10-15 19:42:42,190 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -45 predicate places. [2021-10-15 19:42:42,190 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 419 transitions, 2734 flow [2021-10-15 19:42:42,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:42,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:42,192 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:42,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:42:42,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:42,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -138953033, now seen corresponding path program 1 times [2021-10-15 19:42:42,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:42,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378245336] [2021-10-15 19:42:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:42,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:42,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:42,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378245336] [2021-10-15 19:42:42,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378245336] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:42,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:42,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:42,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861155416] [2021-10-15 19:42:42,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:42,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:42,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:42,540 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:42,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 419 transitions, 2734 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:42,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:42,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:42,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:44,774 INFO L129 PetriNetUnfolder]: 354/2849 cut-off events. [2021-10-15 19:42:44,775 INFO L130 PetriNetUnfolder]: For 2637/2637 co-relation queries the response was YES. [2021-10-15 19:42:44,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 2849 events. 354/2849 cut-off events. For 2637/2637 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8488 event pairs, 0 based on Foata normal form. 94/2943 useless extension candidates. Maximal degree in co-relation 5489. Up to 2257 conditions per place. [2021-10-15 19:42:44,796 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 565 selfloop transitions, 83 changer transitions 0/653 dead transitions. [2021-10-15 19:42:44,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 653 transitions, 4954 flow [2021-10-15 19:42:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 19:42:44,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 19:42:44,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 19:42:44,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 19:42:44,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:44,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 19:42:44,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:44,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:44,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:44,811 INFO L186 Difference]: Start difference. First operand has 197 places, 419 transitions, 2734 flow. Second operand 3 states and 527 transitions. [2021-10-15 19:42:44,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 653 transitions, 4954 flow [2021-10-15 19:42:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 653 transitions, 4452 flow, removed 133 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:44,850 INFO L242 Difference]: Finished difference. Result has 198 places, 478 transitions, 3339 flow [2021-10-15 19:42:44,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3339, PETRI_PLACES=198, PETRI_TRANSITIONS=478} [2021-10-15 19:42:44,851 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -44 predicate places. [2021-10-15 19:42:44,851 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 478 transitions, 3339 flow [2021-10-15 19:42:44,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:44,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:44,853 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:44,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:42:44,853 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1874831652, now seen corresponding path program 1 times [2021-10-15 19:42:44,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:44,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566714916] [2021-10-15 19:42:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:44,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 189 proven. 130 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-15 19:42:45,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:45,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566714916] [2021-10-15 19:42:45,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566714916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:45,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667618808] [2021-10-15 19:42:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:45,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:45,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:45,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:42:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:42:45,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-10-15 19:42:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667618808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:46,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:42:46,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 19:42:46,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50514212] [2021-10-15 19:42:46,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:46,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:46,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:42:46,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:46,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 478 transitions, 3339 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:46,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:46,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:46,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:49,141 INFO L129 PetriNetUnfolder]: 337/3188 cut-off events. [2021-10-15 19:42:49,141 INFO L130 PetriNetUnfolder]: For 2980/2980 co-relation queries the response was YES. [2021-10-15 19:42:49,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 3188 events. 337/3188 cut-off events. For 2980/2980 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10293 event pairs, 0 based on Foata normal form. 148/3336 useless extension candidates. Maximal degree in co-relation 6513. Up to 2576 conditions per place. [2021-10-15 19:42:49,172 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 520 selfloop transitions, 124 changer transitions 0/649 dead transitions. [2021-10-15 19:42:49,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 649 transitions, 4929 flow [2021-10-15 19:42:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2021-10-15 19:42:49,177 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4154818325434439 [2021-10-15 19:42:49,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2021-10-15 19:42:49,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2021-10-15 19:42:49,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:49,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2021-10-15 19:42:49,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:49,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:49,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:49,185 INFO L186 Difference]: Start difference. First operand has 198 places, 478 transitions, 3339 flow. Second operand 3 states and 526 transitions. [2021-10-15 19:42:49,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 649 transitions, 4929 flow [2021-10-15 19:42:49,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 649 transitions, 4757 flow, removed 49 selfloop flow, removed 1 redundant places. [2021-10-15 19:42:49,235 INFO L242 Difference]: Finished difference. Result has 201 places, 474 transitions, 3787 flow [2021-10-15 19:42:49,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3787, PETRI_PLACES=201, PETRI_TRANSITIONS=474} [2021-10-15 19:42:49,237 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -41 predicate places. [2021-10-15 19:42:49,237 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 474 transitions, 3787 flow [2021-10-15 19:42:49,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:49,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:49,239 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:49,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:42:49,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:49,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash -532753135, now seen corresponding path program 1 times [2021-10-15 19:42:49,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:49,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006200593] [2021-10-15 19:42:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:49,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-10-15 19:42:49,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:49,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006200593] [2021-10-15 19:42:49,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006200593] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:49,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:49,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:49,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860689855] [2021-10-15 19:42:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:42:49,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:42:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:42:49,793 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:49,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 474 transitions, 3787 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:49,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:49,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:49,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:52,732 INFO L129 PetriNetUnfolder]: 359/3446 cut-off events. [2021-10-15 19:42:52,733 INFO L130 PetriNetUnfolder]: For 3400/3400 co-relation queries the response was YES. [2021-10-15 19:42:52,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8556 conditions, 3446 events. 359/3446 cut-off events. For 3400/3400 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 11841 event pairs, 0 based on Foata normal form. 2/3448 useless extension candidates. Maximal degree in co-relation 7363. Up to 3009 conditions per place. [2021-10-15 19:42:52,757 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 528 selfloop transitions, 20 changer transitions 145/698 dead transitions. [2021-10-15 19:42:52,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 698 transitions, 5836 flow [2021-10-15 19:42:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:42:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:42:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2021-10-15 19:42:52,763 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3015402843601896 [2021-10-15 19:42:52,764 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2021-10-15 19:42:52,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2021-10-15 19:42:52,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:52,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2021-10-15 19:42:52,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:52,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:52,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:52,773 INFO L186 Difference]: Start difference. First operand has 201 places, 474 transitions, 3787 flow. Second operand 4 states and 509 transitions. [2021-10-15 19:42:52,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 698 transitions, 5836 flow [2021-10-15 19:42:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 698 transitions, 5426 flow, removed 79 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:52,822 INFO L242 Difference]: Finished difference. Result has 205 places, 378 transitions, 2518 flow [2021-10-15 19:42:52,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2518, PETRI_PLACES=205, PETRI_TRANSITIONS=378} [2021-10-15 19:42:52,824 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -37 predicate places. [2021-10-15 19:42:52,824 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 378 transitions, 2518 flow [2021-10-15 19:42:52,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:52,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:52,825 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:52,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:42:52,826 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1190620738, now seen corresponding path program 1 times [2021-10-15 19:42:52,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:52,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660700727] [2021-10-15 19:42:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:52,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 19:42:53,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:53,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660700727] [2021-10-15 19:42:53,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660700727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:53,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:53,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:53,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486271514] [2021-10-15 19:42:53,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:53,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:53,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:53,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 378 transitions, 2518 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:53,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:53,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:53,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:55,465 INFO L129 PetriNetUnfolder]: 286/4027 cut-off events. [2021-10-15 19:42:55,466 INFO L130 PetriNetUnfolder]: For 2537/2537 co-relation queries the response was YES. [2021-10-15 19:42:55,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9252 conditions, 4027 events. 286/4027 cut-off events. For 2537/2537 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 16713 event pairs, 0 based on Foata normal form. 41/4068 useless extension candidates. Maximal degree in co-relation 8052. Up to 2784 conditions per place. [2021-10-15 19:42:55,494 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 495 selfloop transitions, 122 changer transitions 0/622 dead transitions. [2021-10-15 19:42:55,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 622 transitions, 4768 flow [2021-10-15 19:42:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:42:55,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 19:42:55,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:42:55,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:42:55,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:55,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:42:55,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:55,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:55,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:55,505 INFO L186 Difference]: Start difference. First operand has 205 places, 378 transitions, 2518 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:42:55,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 622 transitions, 4768 flow [2021-10-15 19:42:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 622 transitions, 4644 flow, removed 42 selfloop flow, removed 3 redundant places. [2021-10-15 19:42:55,544 INFO L242 Difference]: Finished difference. Result has 205 places, 447 transitions, 3744 flow [2021-10-15 19:42:55,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3744, PETRI_PLACES=205, PETRI_TRANSITIONS=447} [2021-10-15 19:42:55,545 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -37 predicate places. [2021-10-15 19:42:55,545 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 447 transitions, 3744 flow [2021-10-15 19:42:55,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:55,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:55,547 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:55,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:42:55,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1892789993, now seen corresponding path program 1 times [2021-10-15 19:42:55,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:55,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381574584] [2021-10-15 19:42:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:55,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 19:42:55,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:55,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381574584] [2021-10-15 19:42:55,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381574584] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:55,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:55,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:55,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457862177] [2021-10-15 19:42:55,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:55,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:55,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:55,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 447 transitions, 3744 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:55,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:55,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:55,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:58,952 INFO L129 PetriNetUnfolder]: 363/5172 cut-off events. [2021-10-15 19:42:58,952 INFO L130 PetriNetUnfolder]: For 5641/5641 co-relation queries the response was YES. [2021-10-15 19:42:58,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12211 conditions, 5172 events. 363/5172 cut-off events. For 5641/5641 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 24699 event pairs, 0 based on Foata normal form. 98/5270 useless extension candidates. Maximal degree in co-relation 11446. Up to 3318 conditions per place. [2021-10-15 19:42:58,971 INFO L132 encePairwiseOnDemand]: 366/422 looper letters, 589 selfloop transitions, 105 changer transitions 0/699 dead transitions. [2021-10-15 19:42:58,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 699 transitions, 6473 flow [2021-10-15 19:42:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:42:58,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 19:42:58,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:42:58,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:42:58,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:58,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:42:58,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:58,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:58,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:58,981 INFO L186 Difference]: Start difference. First operand has 205 places, 447 transitions, 3744 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:42:58,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 699 transitions, 6473 flow [2021-10-15 19:42:59,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 699 transitions, 6165 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:59,033 INFO L242 Difference]: Finished difference. Result has 207 places, 515 transitions, 5059 flow [2021-10-15 19:42:59,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5059, PETRI_PLACES=207, PETRI_TRANSITIONS=515} [2021-10-15 19:42:59,034 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -35 predicate places. [2021-10-15 19:42:59,035 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 515 transitions, 5059 flow [2021-10-15 19:42:59,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:59,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:59,036 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:59,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:42:59,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2029932731, now seen corresponding path program 1 times [2021-10-15 19:42:59,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:59,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476322823] [2021-10-15 19:42:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:59,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 660 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-10-15 19:42:59,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:59,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476322823] [2021-10-15 19:42:59,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476322823] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:59,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:59,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:59,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193956872] [2021-10-15 19:42:59,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:59,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:59,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:42:59,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 515 transitions, 5059 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:59,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:59,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:42:59,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:02,865 INFO L129 PetriNetUnfolder]: 326/5135 cut-off events. [2021-10-15 19:43:02,865 INFO L130 PetriNetUnfolder]: For 5637/5637 co-relation queries the response was YES. [2021-10-15 19:43:02,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12123 conditions, 5135 events. 326/5135 cut-off events. For 5637/5637 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 23290 event pairs, 0 based on Foata normal form. 37/5172 useless extension candidates. Maximal degree in co-relation 11354. Up to 3748 conditions per place. [2021-10-15 19:43:02,887 INFO L132 encePairwiseOnDemand]: 395/422 looper letters, 576 selfloop transitions, 81 changer transitions 0/662 dead transitions. [2021-10-15 19:43:02,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 662 transitions, 6292 flow [2021-10-15 19:43:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2021-10-15 19:43:02,891 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36255924170616116 [2021-10-15 19:43:02,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2021-10-15 19:43:02,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2021-10-15 19:43:02,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:02,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2021-10-15 19:43:02,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,899 INFO L186 Difference]: Start difference. First operand has 207 places, 515 transitions, 5059 flow. Second operand 3 states and 459 transitions. [2021-10-15 19:43:02,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 662 transitions, 6292 flow [2021-10-15 19:43:02,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 662 transitions, 6100 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:02,949 INFO L242 Difference]: Finished difference. Result has 208 places, 487 transitions, 4697 flow [2021-10-15 19:43:02,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4436, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4697, PETRI_PLACES=208, PETRI_TRANSITIONS=487} [2021-10-15 19:43:02,951 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -34 predicate places. [2021-10-15 19:43:02,951 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 487 transitions, 4697 flow [2021-10-15 19:43:02,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:02,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:02,954 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-10-15 19:43:02,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:43:02,954 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1737325549, now seen corresponding path program 1 times [2021-10-15 19:43:02,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:02,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061486206] [2021-10-15 19:43:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:02,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 867 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 19:43:03,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:03,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061486206] [2021-10-15 19:43:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061486206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:03,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973977993] [2021-10-15 19:43:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:03,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:03,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:03,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:03,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:43:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:43:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2021-10-15 19:43:05,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973977993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:05,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:05,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:43:05,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239486986] [2021-10-15 19:43:05,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:05,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:05,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:05,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:43:05,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 487 transitions, 4697 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:05,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:05,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:43:05,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:09,219 INFO L129 PetriNetUnfolder]: 352/5873 cut-off events. [2021-10-15 19:43:09,219 INFO L130 PetriNetUnfolder]: For 6874/6874 co-relation queries the response was YES. [2021-10-15 19:43:09,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13782 conditions, 5873 events. 352/5873 cut-off events. For 6874/6874 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 31357 event pairs, 0 based on Foata normal form. 70/5943 useless extension candidates. Maximal degree in co-relation 13021. Up to 4100 conditions per place. [2021-10-15 19:43:09,246 INFO L132 encePairwiseOnDemand]: 365/422 looper letters, 570 selfloop transitions, 117 changer transitions 0/692 dead transitions. [2021-10-15 19:43:09,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 692 transitions, 6835 flow [2021-10-15 19:43:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 19:43:09,250 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 19:43:09,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 19:43:09,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 19:43:09,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:09,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 19:43:09,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,258 INFO L186 Difference]: Start difference. First operand has 208 places, 487 transitions, 4697 flow. Second operand 3 states and 490 transitions. [2021-10-15 19:43:09,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 692 transitions, 6835 flow [2021-10-15 19:43:09,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 692 transitions, 6735 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:43:09,312 INFO L242 Difference]: Finished difference. Result has 209 places, 517 transitions, 5649 flow [2021-10-15 19:43:09,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4399, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5649, PETRI_PLACES=209, PETRI_TRANSITIONS=517} [2021-10-15 19:43:09,313 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -33 predicate places. [2021-10-15 19:43:09,314 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 517 transitions, 5649 flow [2021-10-15 19:43:09,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:09,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:09,315 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-10-15 19:43:09,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:43:09,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:43:09,551 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:09,552 INFO L82 PathProgramCache]: Analyzing trace with hash 233732893, now seen corresponding path program 1 times [2021-10-15 19:43:09,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:09,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085515788] [2021-10-15 19:43:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:09,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 1261 proven. 110 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-10-15 19:43:10,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:10,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085515788] [2021-10-15 19:43:10,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085515788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:10,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555921245] [2021-10-15 19:43:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:10,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:10,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:10,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:10,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:43:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:43:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2021-10-15 19:43:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555921245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:12,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:12,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:43:12,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379416191] [2021-10-15 19:43:12,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:12,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:12,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:43:12,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 517 transitions, 5649 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:12,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:12,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:43:12,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:17,565 INFO L129 PetriNetUnfolder]: 394/6627 cut-off events. [2021-10-15 19:43:17,565 INFO L130 PetriNetUnfolder]: For 8454/8454 co-relation queries the response was YES. [2021-10-15 19:43:17,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15886 conditions, 6627 events. 394/6627 cut-off events. For 8454/8454 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 39035 event pairs, 0 based on Foata normal form. 4/6631 useless extension candidates. Maximal degree in co-relation 14702. Up to 4656 conditions per place. [2021-10-15 19:43:17,598 INFO L132 encePairwiseOnDemand]: 389/422 looper letters, 601 selfloop transitions, 128 changer transitions 0/734 dead transitions. [2021-10-15 19:43:17,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 734 transitions, 8125 flow [2021-10-15 19:43:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 19:43:17,602 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 19:43:17,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 19:43:17,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 19:43:17,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:17,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 19:43:17,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:17,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:17,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:17,610 INFO L186 Difference]: Start difference. First operand has 209 places, 517 transitions, 5649 flow. Second operand 3 states and 458 transitions. [2021-10-15 19:43:17,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 734 transitions, 8125 flow [2021-10-15 19:43:17,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 734 transitions, 7781 flow, removed 37 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:17,684 INFO L242 Difference]: Finished difference. Result has 211 places, 559 transitions, 6577 flow [2021-10-15 19:43:17,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5333, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6577, PETRI_PLACES=211, PETRI_TRANSITIONS=559} [2021-10-15 19:43:17,686 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -31 predicate places. [2021-10-15 19:43:17,686 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 559 transitions, 6577 flow [2021-10-15 19:43:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:17,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:17,687 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:17,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:43:17,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:43:17,903 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1864267949, now seen corresponding path program 1 times [2021-10-15 19:43:17,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:17,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101093366] [2021-10-15 19:43:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:17,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1858 backedges. 1344 proven. 155 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-10-15 19:43:18,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:18,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101093366] [2021-10-15 19:43:18,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101093366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:18,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448099705] [2021-10-15 19:43:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:18,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:18,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:18,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:18,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:43:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:43:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1858 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2021-10-15 19:43:21,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448099705] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:21,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:21,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:43:21,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631212999] [2021-10-15 19:43:21,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:21,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:21,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:43:21,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 559 transitions, 6577 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:21,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:21,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:43:21,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:25,992 INFO L129 PetriNetUnfolder]: 416/7005 cut-off events. [2021-10-15 19:43:25,993 INFO L130 PetriNetUnfolder]: For 11354/11354 co-relation queries the response was YES. [2021-10-15 19:43:26,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16928 conditions, 7005 events. 416/7005 cut-off events. For 11354/11354 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 42630 event pairs, 0 based on Foata normal form. 59/7064 useless extension candidates. Maximal degree in co-relation 15669. Up to 4243 conditions per place. [2021-10-15 19:43:26,019 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 578 selfloop transitions, 176 changer transitions 0/759 dead transitions. [2021-10-15 19:43:26,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 759 transitions, 8855 flow [2021-10-15 19:43:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:43:26,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 19:43:26,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:43:26,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:43:26,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:26,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:43:26,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:26,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:26,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:26,032 INFO L186 Difference]: Start difference. First operand has 211 places, 559 transitions, 6577 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:43:26,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 759 transitions, 8855 flow [2021-10-15 19:43:26,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 759 transitions, 8571 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:26,106 INFO L242 Difference]: Finished difference. Result has 213 places, 584 transitions, 7571 flow [2021-10-15 19:43:26,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7571, PETRI_PLACES=213, PETRI_TRANSITIONS=584} [2021-10-15 19:43:26,108 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -29 predicate places. [2021-10-15 19:43:26,108 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 584 transitions, 7571 flow [2021-10-15 19:43:26,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:26,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:43:26,110 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 19:43:26,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:43:26,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:43:26,335 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:43:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1858999144, now seen corresponding path program 1 times [2021-10-15 19:43:26,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:26,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632032431] [2021-10-15 19:43:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:26,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 1443 proven. 155 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-10-15 19:43:26,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:26,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632032431] [2021-10-15 19:43:26,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632032431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:26,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003330098] [2021-10-15 19:43:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:26,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:26,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:26,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:26,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:43:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:43:27,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 1688 trivial. 0 not checked. [2021-10-15 19:43:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003330098] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:29,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:29,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:43:29,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554174204] [2021-10-15 19:43:29,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:29,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:29,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:29,747 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:43:29,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 584 transitions, 7571 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:29,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:43:29,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:43:29,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:43:34,979 INFO L129 PetriNetUnfolder]: 366/7131 cut-off events. [2021-10-15 19:43:34,979 INFO L130 PetriNetUnfolder]: For 13024/13024 co-relation queries the response was YES. [2021-10-15 19:43:34,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17093 conditions, 7131 events. 366/7131 cut-off events. For 13024/13024 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 44501 event pairs, 0 based on Foata normal form. 75/7206 useless extension candidates. Maximal degree in co-relation 15770. Up to 4835 conditions per place. [2021-10-15 19:43:35,003 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 0 selfloop transitions, 0 changer transitions 711/711 dead transitions. [2021-10-15 19:43:35,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 711 transitions, 8549 flow [2021-10-15 19:43:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:43:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 19:43:35,008 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 19:43:35,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 19:43:35,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 19:43:35,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:43:35,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 19:43:35,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:35,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:35,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:35,017 INFO L186 Difference]: Start difference. First operand has 213 places, 584 transitions, 7571 flow. Second operand 3 states and 490 transitions. [2021-10-15 19:43:35,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 711 transitions, 8549 flow [2021-10-15 19:43:35,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 711 transitions, 8179 flow, removed 33 selfloop flow, removed 2 redundant places. [2021-10-15 19:43:35,088 INFO L242 Difference]: Finished difference. Result has 211 places, 0 transitions, 0 flow [2021-10-15 19:43:35,089 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6095, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=211, PETRI_TRANSITIONS=0} [2021-10-15 19:43:35,089 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -31 predicate places. [2021-10-15 19:43:35,089 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 0 transitions, 0 flow [2021-10-15 19:43:35,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:43:35,092 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:43:35,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 19:43:35,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:43:35,308 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:43:35,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:43:35 BoogieIcfgContainer [2021-10-15 19:43:35,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:43:35,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:43:35,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:43:35,315 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:43:35,316 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:29" (3/4) ... [2021-10-15 19:43:35,320 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:43:35,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:43:35,361 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:43:35,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:43:35,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:43:35,544 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:43:35,544 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:43:35,545 INFO L168 Benchmark]: Toolchain (without parser) took 68845.73 ms. Allocated memory was 100.7 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 60.6 MB in the beginning and 994.5 MB in the end (delta: -933.9 MB). Peak memory consumption was 502.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,546 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory was 79.6 MB in the beginning and 79.5 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:43:35,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 973.47 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 60.4 MB in the beginning and 94.6 MB in the end (delta: -34.2 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 174.50 ms. Allocated memory is still 138.4 MB. Free memory was 94.6 MB in the beginning and 84.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,547 INFO L168 Benchmark]: Boogie Preprocessor took 118.49 ms. Allocated memory is still 138.4 MB. Free memory was 84.7 MB in the beginning and 79.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,547 INFO L168 Benchmark]: RCFGBuilder took 1952.45 ms. Allocated memory is still 138.4 MB. Free memory was 79.0 MB in the beginning and 77.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,548 INFO L168 Benchmark]: TraceAbstraction took 65387.69 ms. Allocated memory was 138.4 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 77.2 MB in the beginning and 1.0 GB in the end (delta: -935.3 MB). Peak memory consumption was 460.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,549 INFO L168 Benchmark]: Witness Printer took 228.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 994.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:35,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory was 79.6 MB in the beginning and 79.5 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 973.47 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 60.4 MB in the beginning and 94.6 MB in the end (delta: -34.2 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 174.50 ms. Allocated memory is still 138.4 MB. Free memory was 94.6 MB in the beginning and 84.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 118.49 ms. Allocated memory is still 138.4 MB. Free memory was 84.7 MB in the beginning and 79.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1952.45 ms. Allocated memory is still 138.4 MB. Free memory was 79.0 MB in the beginning and 77.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 65387.69 ms. Allocated memory was 138.4 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 77.2 MB in the beginning and 1.0 GB in the end (delta: -935.3 MB). Peak memory consumption was 460.7 MB. Max. memory is 16.1 GB. * Witness Printer took 228.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 994.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 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: 155]: 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, 245 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 16.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 65307.0ms, OverallIterations: 15, TraceHistogramMax: 7, EmptinessCheckTime: 0.0ms, AutomataDifference: 45477.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 189.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1668 SDtfs, 2121 SDslu, 0 SDs, 0 SdLazy, 7687 SolverSat, 985 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9596.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3575 GetRequests, 3542 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 168.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7571occurred in iteration=14, InterpolantAutomatonStates: 48, 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: 545.8ms SsaConstructionTime, 1866.5ms SatisfiabilityAnalysisTime, 12484.3ms InterpolantComputationTime, 9629 NumberOfCodeBlocks, 9629 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 9608 ConstructedInterpolants, 0 QuantifiedInterpolants, 21596 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4576 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 21 InterpolantComputations, 15 PerfectInterpolantSequences, 17702/18427 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 19:43:35,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b465781d-3c8f-4cd5-bfa5-418311e04cfe/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...