./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label57.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_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/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_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/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_64500396-72df-467f-ad5a-b2e914cfb225/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 1b3ff5d79b7436b9866ad9b80b9e60df1f87bc40 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:38:38,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:38:38,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:38:38,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:38:38,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:38:38,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:38:38,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:38:38,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:38:38,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:38:38,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:38:38,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:38:38,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:38:38,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:38:38,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:38:38,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:38:38,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:38:38,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:38:38,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:38:38,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:38:38,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:38:38,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:38:38,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:38:38,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:38:38,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:38:38,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:38:38,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:38:38,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:38:38,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:38:38,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:38:38,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:38:38,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:38:38,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:38:38,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:38:38,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:38:38,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:38:38,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:38:38,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:38:38,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:38:38,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:38:38,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:38:38,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:38:38,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:38:38,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:38:38,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:38:38,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:38:38,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:38:38,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:38:38,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:38:38,629 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:38:38,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:38:38,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:38:38,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:38:38,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:38:38,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:38:38,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:38:38,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:38:38,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:38:38,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:38:38,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:38:38,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:38:38,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:38:38,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:38:38,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:38:38,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:38:38,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:38:38,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:38:38,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:38:38,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:38:38,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:38:38,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:38:38,635 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:38:38,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:38:38,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:38:38,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:38:38,637 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_64500396-72df-467f-ad5a-b2e914cfb225/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b3ff5d79b7436b9866ad9b80b9e60df1f87bc40 [2021-10-15 19:38:38,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:38:38,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:38:38,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:38:38,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:38:38,971 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:38:38,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c [2021-10-15 19:38:39,058 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/data/7f6b8b361/b7f6a51981ff4c20a302575f102ef38e/FLAG92bac0e12 [2021-10-15 19:38:39,710 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:38:39,711 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/sv-benchmarks/c/eca-rers2012/Problem03_label57.c [2021-10-15 19:38:39,735 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/data/7f6b8b361/b7f6a51981ff4c20a302575f102ef38e/FLAG92bac0e12 [2021-10-15 19:38:39,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/data/7f6b8b361/b7f6a51981ff4c20a302575f102ef38e [2021-10-15 19:38:39,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:38:39,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:38:39,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:38:39,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:38:39,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:38:39,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:38:39" (1/1) ... [2021-10-15 19:38:39,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b841f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:39, skipping insertion in model container [2021-10-15 19:38:39,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:38:39" (1/1) ... [2021-10-15 19:38:39,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:38:39,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:38:40,543 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_64500396-72df-467f-ad5a-b2e914cfb225/sv-benchmarks/c/eca-rers2012/Problem03_label57.c[55951,55964] [2021-10-15 19:38:40,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:38:40,584 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:38:40,936 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_64500396-72df-467f-ad5a-b2e914cfb225/sv-benchmarks/c/eca-rers2012/Problem03_label57.c[55951,55964] [2021-10-15 19:38:40,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:38:40,972 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:38:40,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40 WrapperNode [2021-10-15 19:38:40,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:38:40,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:38:40,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:38:40,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:38:40,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:38:41,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:38:41,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:38:41,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:38:41,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:38:41,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:38:41,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:38:41,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:38:41,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:38:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:41,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:38:41,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:38:41,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:38:41,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:38:41,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:38:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:38:43,139 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:38:43,140 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:38:43,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:43 BoogieIcfgContainer [2021-10-15 19:38:43,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:38:43,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:38:43,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:38:43,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:38:43,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:38:39" (1/3) ... [2021-10-15 19:38:43,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b92cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:38:43, skipping insertion in model container [2021-10-15 19:38:43,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (2/3) ... [2021-10-15 19:38:43,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b92cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:38:43, skipping insertion in model container [2021-10-15 19:38:43,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:43" (3/3) ... [2021-10-15 19:38:43,153 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label57.c [2021-10-15 19:38:43,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:38:43,162 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:38:43,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:38:43,226 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 19:38:43,226 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:38:43,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 302 places, 519 transitions, 1038 flow [2021-10-15 19:38:43,468 INFO L129 PetriNetUnfolder]: 218/519 cut-off events. [2021-10-15 19:38:43,468 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:43,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 519 events. 218/519 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 358 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2021-10-15 19:38:43,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 519 transitions, 1038 flow [2021-10-15 19:38:43,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 514 transitions, 1028 flow [2021-10-15 19:38:43,541 INFO L129 PetriNetUnfolder]: 173/386 cut-off events. [2021-10-15 19:38:43,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:43,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:43,543 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:38:43,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:38:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash -10226053, now seen corresponding path program 1 times [2021-10-15 19:38:43,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:43,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870236546] [2021-10-15 19:38:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:43,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:44,363 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 19:38:44,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:44,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870236546] [2021-10-15 19:38:44,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870236546] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:44,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:44,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:38:44,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569703424] [2021-10-15 19:38:44,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:38:44,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:38:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:38:44,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 519 [2021-10-15 19:38:44,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 514 transitions, 1028 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:44,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 519 [2021-10-15 19:38:44,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:45,640 INFO L129 PetriNetUnfolder]: 274/802 cut-off events. [2021-10-15 19:38:45,641 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:45,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 802 events. 274/802 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1159 event pairs, 0 based on Foata normal form. 74/538 useless extension candidates. Maximal degree in co-relation 2. Up to 394 conditions per place. [2021-10-15 19:38:45,651 INFO L132 encePairwiseOnDemand]: 279/519 looper letters, 573 selfloop transitions, 99 changer transitions 89/789 dead transitions. [2021-10-15 19:38:45,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 789 transitions, 3100 flow [2021-10-15 19:38:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:38:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:38:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1003 transitions. [2021-10-15 19:38:45,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6441875401412974 [2021-10-15 19:38:45,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1003 transitions. [2021-10-15 19:38:45,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1003 transitions. [2021-10-15 19:38:45,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:45,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1003 transitions. [2021-10-15 19:38:45,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.3333333333333) internal successors, (1003), 3 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,710 INFO L186 Difference]: Start difference. First operand has 299 places, 514 transitions, 1028 flow. Second operand 3 states and 1003 transitions. [2021-10-15 19:38:45,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 789 transitions, 3100 flow [2021-10-15 19:38:45,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 789 transitions, 3100 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:38:45,747 INFO L242 Difference]: Finished difference. Result has 303 places, 476 transitions, 1580 flow [2021-10-15 19:38:45,750 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1580, PETRI_PLACES=303, PETRI_TRANSITIONS=476} [2021-10-15 19:38:45,751 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, 4 predicate places. [2021-10-15 19:38:45,751 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 476 transitions, 1580 flow [2021-10-15 19:38:45,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:45,753 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:38:45,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:38:45,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:38:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1912871251, now seen corresponding path program 1 times [2021-10-15 19:38:45,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:45,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424241822] [2021-10-15 19:38:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:45,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:45,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:45,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424241822] [2021-10-15 19:38:45,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424241822] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:45,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:45,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:38:45,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762626018] [2021-10-15 19:38:45,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:38:45,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:38:45,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:38:45,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:38:45,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 476 transitions, 1580 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:45,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:38:45,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:47,130 INFO L129 PetriNetUnfolder]: 429/1317 cut-off events. [2021-10-15 19:38:47,131 INFO L130 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2021-10-15 19:38:47,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3058 conditions, 1317 events. 429/1317 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3280 event pairs, 0 based on Foata normal form. 68/1276 useless extension candidates. Maximal degree in co-relation 1114. Up to 713 conditions per place. [2021-10-15 19:38:47,144 INFO L132 encePairwiseOnDemand]: 400/519 looper letters, 656 selfloop transitions, 129 changer transitions 0/826 dead transitions. [2021-10-15 19:38:47,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 826 transitions, 4222 flow [2021-10-15 19:38:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:38:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:38:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2021-10-15 19:38:47,150 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5260115606936416 [2021-10-15 19:38:47,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2021-10-15 19:38:47,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2021-10-15 19:38:47,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:47,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2021-10-15 19:38:47,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,166 INFO L186 Difference]: Start difference. First operand has 303 places, 476 transitions, 1580 flow. Second operand 3 states and 819 transitions. [2021-10-15 19:38:47,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 826 transitions, 4222 flow [2021-10-15 19:38:47,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 826 transitions, 3908 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:47,218 INFO L242 Difference]: Finished difference. Result has 245 places, 580 transitions, 2642 flow [2021-10-15 19:38:47,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2642, PETRI_PLACES=245, PETRI_TRANSITIONS=580} [2021-10-15 19:38:47,226 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -54 predicate places. [2021-10-15 19:38:47,226 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 580 transitions, 2642 flow [2021-10-15 19:38:47,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,227 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:47,227 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:47,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:38:47,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:38:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:47,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1078481951, now seen corresponding path program 1 times [2021-10-15 19:38:47,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:47,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712859306] [2021-10-15 19:38:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:47,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:47,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:47,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712859306] [2021-10-15 19:38:47,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712859306] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:47,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:47,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:38:47,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623148832] [2021-10-15 19:38:47,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:38:47,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:38:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:38:47,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 519 [2021-10-15 19:38:47,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 580 transitions, 2642 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:47,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 519 [2021-10-15 19:38:47,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:48,865 INFO L129 PetriNetUnfolder]: 720/2446 cut-off events. [2021-10-15 19:38:48,865 INFO L130 PetriNetUnfolder]: For 992/992 co-relation queries the response was YES. [2021-10-15 19:38:48,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6051 conditions, 2446 events. 720/2446 cut-off events. For 992/992 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 9498 event pairs, 0 based on Foata normal form. 96/2369 useless extension candidates. Maximal degree in co-relation 2386. Up to 1256 conditions per place. [2021-10-15 19:38:48,885 INFO L132 encePairwiseOnDemand]: 387/519 looper letters, 732 selfloop transitions, 244 changer transitions 0/1001 dead transitions. [2021-10-15 19:38:48,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1001 transitions, 6344 flow [2021-10-15 19:38:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:38:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:38:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2021-10-15 19:38:48,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.51252408477842 [2021-10-15 19:38:48,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2021-10-15 19:38:48,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2021-10-15 19:38:48,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:48,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2021-10-15 19:38:48,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,900 INFO L186 Difference]: Start difference. First operand has 245 places, 580 transitions, 2642 flow. Second operand 3 states and 798 transitions. [2021-10-15 19:38:48,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1001 transitions, 6344 flow [2021-10-15 19:38:48,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1001 transitions, 5936 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:48,957 INFO L242 Difference]: Finished difference. Result has 247 places, 746 transitions, 4676 flow [2021-10-15 19:38:48,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4676, PETRI_PLACES=247, PETRI_TRANSITIONS=746} [2021-10-15 19:38:48,958 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -52 predicate places. [2021-10-15 19:38:48,959 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 746 transitions, 4676 flow [2021-10-15 19:38:48,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:48,960 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:48,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:38:48,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:38:48,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:48,962 INFO L82 PathProgramCache]: Analyzing trace with hash 288702254, now seen corresponding path program 1 times [2021-10-15 19:38:48,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:48,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366132902] [2021-10-15 19:38:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:48,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:49,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:49,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366132902] [2021-10-15 19:38:49,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366132902] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:49,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:49,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:38:49,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087043922] [2021-10-15 19:38:49,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:38:49,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:38:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:38:49,082 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:38:49,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 746 transitions, 4676 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:49,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:49,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:38:49,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:51,263 INFO L129 PetriNetUnfolder]: 1002/4360 cut-off events. [2021-10-15 19:38:51,263 INFO L130 PetriNetUnfolder]: For 3902/3902 co-relation queries the response was YES. [2021-10-15 19:38:51,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11215 conditions, 4360 events. 1002/4360 cut-off events. For 3902/3902 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 23470 event pairs, 0 based on Foata normal form. 376/4664 useless extension candidates. Maximal degree in co-relation 2919. Up to 2280 conditions per place. [2021-10-15 19:38:51,292 INFO L132 encePairwiseOnDemand]: 376/519 looper letters, 739 selfloop transitions, 359 changer transitions 0/1144 dead transitions. [2021-10-15 19:38:51,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1144 transitions, 8916 flow [2021-10-15 19:38:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:38:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:38:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2021-10-15 19:38:51,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5240847784200385 [2021-10-15 19:38:51,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2021-10-15 19:38:51,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2021-10-15 19:38:51,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:51,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2021-10-15 19:38:51,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:51,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:51,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:51,309 INFO L186 Difference]: Start difference. First operand has 247 places, 746 transitions, 4676 flow. Second operand 3 states and 816 transitions. [2021-10-15 19:38:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1144 transitions, 8916 flow [2021-10-15 19:38:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1144 transitions, 8232 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:51,375 INFO L242 Difference]: Finished difference. Result has 249 places, 921 transitions, 7498 flow [2021-10-15 19:38:51,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=4188, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7498, PETRI_PLACES=249, PETRI_TRANSITIONS=921} [2021-10-15 19:38:51,377 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -50 predicate places. [2021-10-15 19:38:51,377 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 921 transitions, 7498 flow [2021-10-15 19:38:51,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:51,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:51,379 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:38:51,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:38:51,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:38:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash -26883798, now seen corresponding path program 1 times [2021-10-15 19:38:51,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:51,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91977834] [2021-10-15 19:38:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:51,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:51,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:51,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91977834] [2021-10-15 19:38:51,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91977834] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:51,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:51,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:38:51,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266739033] [2021-10-15 19:38:51,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:38:51,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:51,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:38:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:38:51,473 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 519 [2021-10-15 19:38:51,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 921 transitions, 7498 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:51,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:51,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 519 [2021-10-15 19:38:51,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:55,600 INFO L129 PetriNetUnfolder]: 1715/8348 cut-off events. [2021-10-15 19:38:55,601 INFO L130 PetriNetUnfolder]: For 10516/10516 co-relation queries the response was YES. [2021-10-15 19:38:55,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22667 conditions, 8348 events. 1715/8348 cut-off events. For 10516/10516 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 56938 event pairs, 1 based on Foata normal form. 254/8538 useless extension candidates. Maximal degree in co-relation 6389. Up to 4294 conditions per place. [2021-10-15 19:38:55,654 INFO L132 encePairwiseOnDemand]: 373/519 looper letters, 997 selfloop transitions, 561 changer transitions 0/1602 dead transitions. [2021-10-15 19:38:55,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1602 transitions, 15982 flow [2021-10-15 19:38:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:38:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:38:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2021-10-15 19:38:55,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5260115606936416 [2021-10-15 19:38:55,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2021-10-15 19:38:55,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2021-10-15 19:38:55,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:55,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2021-10-15 19:38:55,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:55,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:55,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:55,671 INFO L186 Difference]: Start difference. First operand has 249 places, 921 transitions, 7498 flow. Second operand 3 states and 819 transitions. [2021-10-15 19:38:55,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1602 transitions, 15982 flow [2021-10-15 19:38:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1602 transitions, 14756 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:55,777 INFO L242 Difference]: Finished difference. Result has 251 places, 1380 transitions, 14424 flow [2021-10-15 19:38:55,778 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=14424, PETRI_PLACES=251, PETRI_TRANSITIONS=1380} [2021-10-15 19:38:55,779 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -48 predicate places. [2021-10-15 19:38:55,779 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 1380 transitions, 14424 flow [2021-10-15 19:38:55,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:55,780 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:55,780 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:55,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:38:55,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:38:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1527292661, now seen corresponding path program 1 times [2021-10-15 19:38:55,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:55,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183418631] [2021-10-15 19:38:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:55,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:55,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:55,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183418631] [2021-10-15 19:38:55,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183418631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:55,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76501765] [2021-10-15 19:38:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:55,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:55,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:55,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:55,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:38:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:38:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:38:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76501765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:56,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:56,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:38:56,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031700416] [2021-10-15 19:38:56,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:38:56,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:38:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:38:56,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:38:56,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 1380 transitions, 14424 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 19:38:56,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:56,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:38:56,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:03,089 INFO L129 PetriNetUnfolder]: 2025/11922 cut-off events. [2021-10-15 19:39:03,089 INFO L130 PetriNetUnfolder]: For 18779/18779 co-relation queries the response was YES. [2021-10-15 19:39:03,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32591 conditions, 11922 events. 2025/11922 cut-off events. For 18779/18779 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 97034 event pairs, 1 based on Foata normal form. 196/12118 useless extension candidates. Maximal degree in co-relation 5155. Up to 7283 conditions per place. [2021-10-15 19:39:03,131 INFO L132 encePairwiseOnDemand]: 420/519 looper letters, 1014 selfloop transitions, 709 changer transitions 0/1769 dead transitions. [2021-10-15 19:39:03,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1769 transitions, 20472 flow [2021-10-15 19:39:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2021-10-15 19:39:03,136 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4714193962748876 [2021-10-15 19:39:03,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2021-10-15 19:39:03,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2021-10-15 19:39:03,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:03,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2021-10-15 19:39:03,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,146 INFO L186 Difference]: Start difference. First operand has 251 places, 1380 transitions, 14424 flow. Second operand 3 states and 734 transitions. [2021-10-15 19:39:03,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1769 transitions, 20472 flow [2021-10-15 19:39:03,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1769 transitions, 19154 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:03,253 INFO L242 Difference]: Finished difference. Result has 253 places, 1536 transitions, 18294 flow [2021-10-15 19:39:03,255 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=13302, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=18294, PETRI_PLACES=253, PETRI_TRANSITIONS=1536} [2021-10-15 19:39:03,256 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -46 predicate places. [2021-10-15 19:39:03,256 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 1536 transitions, 18294 flow [2021-10-15 19:39:03,256 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 19:39:03,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:03,257 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:03,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:03,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 19:39:03,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash 383666067, now seen corresponding path program 1 times [2021-10-15 19:39:03,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:03,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517149401] [2021-10-15 19:39:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:03,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:39:03,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:03,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517149401] [2021-10-15 19:39:03,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517149401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:03,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865746841] [2021-10-15 19:39:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:03,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:03,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:03,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:03,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:39:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:39:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:39:04,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865746841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:04,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:04,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:39:04,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166680220] [2021-10-15 19:39:04,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:04,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:39:04,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:39:04,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1536 transitions, 18294 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:04,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:04,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:39:04,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:12,323 INFO L129 PetriNetUnfolder]: 1791/11688 cut-off events. [2021-10-15 19:39:12,323 INFO L130 PetriNetUnfolder]: For 23174/23174 co-relation queries the response was YES. [2021-10-15 19:39:12,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32066 conditions, 11688 events. 1791/11688 cut-off events. For 23174/23174 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 96811 event pairs, 1 based on Foata normal form. 234/11922 useless extension candidates. Maximal degree in co-relation 8266. Up to 7689 conditions per place. [2021-10-15 19:39:12,368 INFO L132 encePairwiseOnDemand]: 411/519 looper letters, 1051 selfloop transitions, 488 changer transitions 0/1585 dead transitions. [2021-10-15 19:39:12,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1585 transitions, 19414 flow [2021-10-15 19:39:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2021-10-15 19:39:12,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4714193962748876 [2021-10-15 19:39:12,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2021-10-15 19:39:12,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2021-10-15 19:39:12,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:12,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2021-10-15 19:39:12,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,382 INFO L186 Difference]: Start difference. First operand has 253 places, 1536 transitions, 18294 flow. Second operand 3 states and 734 transitions. [2021-10-15 19:39:12,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1585 transitions, 19414 flow [2021-10-15 19:39:12,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1585 transitions, 17990 flow, removed 126 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:12,512 INFO L242 Difference]: Finished difference. Result has 253 places, 1352 transitions, 15222 flow [2021-10-15 19:39:12,514 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=14246, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15222, PETRI_PLACES=253, PETRI_TRANSITIONS=1352} [2021-10-15 19:39:12,515 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -46 predicate places. [2021-10-15 19:39:12,515 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 1352 transitions, 15222 flow [2021-10-15 19:39:12,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:12,516 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:12,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:12,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:39:12,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1507060477, now seen corresponding path program 1 times [2021-10-15 19:39:12,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:12,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719440122] [2021-10-15 19:39:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:12,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:39:12,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:12,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719440122] [2021-10-15 19:39:12,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719440122] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:12,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:12,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:12,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494328182] [2021-10-15 19:39:12,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:12,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:12,855 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 519 [2021-10-15 19:39:12,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1352 transitions, 15222 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:12,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 519 [2021-10-15 19:39:12,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:18,686 INFO L129 PetriNetUnfolder]: 1680/11541 cut-off events. [2021-10-15 19:39:18,686 INFO L130 PetriNetUnfolder]: For 18196/18196 co-relation queries the response was YES. [2021-10-15 19:39:18,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30972 conditions, 11541 events. 1680/11541 cut-off events. For 18196/18196 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 94198 event pairs, 0 based on Foata normal form. 96/11637 useless extension candidates. Maximal degree in co-relation 13054. Up to 11259 conditions per place. [2021-10-15 19:39:18,721 INFO L132 encePairwiseOnDemand]: 503/519 looper letters, 1238 selfloop transitions, 1 changer transitions 0/1274 dead transitions. [2021-10-15 19:39:18,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1274 transitions, 16862 flow [2021-10-15 19:39:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2021-10-15 19:39:18,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.28901734104046245 [2021-10-15 19:39:18,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2021-10-15 19:39:18,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2021-10-15 19:39:18,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:18,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2021-10-15 19:39:18,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,732 INFO L186 Difference]: Start difference. First operand has 253 places, 1352 transitions, 15222 flow. Second operand 3 states and 450 transitions. [2021-10-15 19:39:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1274 transitions, 16862 flow [2021-10-15 19:39:18,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 1274 transitions, 16397 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:39:18,820 INFO L242 Difference]: Finished difference. Result has 238 places, 1274 transitions, 13921 flow [2021-10-15 19:39:18,822 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=13919, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13921, PETRI_PLACES=238, PETRI_TRANSITIONS=1274} [2021-10-15 19:39:18,822 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -61 predicate places. [2021-10-15 19:39:18,822 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 1274 transitions, 13921 flow [2021-10-15 19:39:18,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,823 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:18,823 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:18,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:39:18,824 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:18,824 INFO L82 PathProgramCache]: Analyzing trace with hash -361443703, now seen corresponding path program 1 times [2021-10-15 19:39:18,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:18,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335772711] [2021-10-15 19:39:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:18,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:39:18,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:18,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335772711] [2021-10-15 19:39:18,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335772711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:18,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738245214] [2021-10-15 19:39:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:18,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:18,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:18,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:39:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:39:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-15 19:39:19,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738245214] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:19,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:19,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:39:19,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876749458] [2021-10-15 19:39:19,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:19,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:39:19,712 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 519 [2021-10-15 19:39:19,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1274 transitions, 13921 flow. Second operand has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:19,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 519 [2021-10-15 19:39:19,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:25,827 INFO L129 PetriNetUnfolder]: 2902/21958 cut-off events. [2021-10-15 19:39:25,828 INFO L130 PetriNetUnfolder]: For 37801/37801 co-relation queries the response was YES. [2021-10-15 19:39:25,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42038 conditions, 21958 events. 2902/21958 cut-off events. For 37801/37801 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 204301 event pairs, 1 based on Foata normal form. 364/22322 useless extension candidates. Maximal degree in co-relation 42021. Up to 4060 conditions per place. [2021-10-15 19:39:25,877 INFO L132 encePairwiseOnDemand]: 467/519 looper letters, 710 selfloop transitions, 179 changer transitions 0/1606 dead transitions. [2021-10-15 19:39:25,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1606 transitions, 19278 flow [2021-10-15 19:39:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1206 transitions. [2021-10-15 19:39:25,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7745664739884393 [2021-10-15 19:39:25,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1206 transitions. [2021-10-15 19:39:25,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1206 transitions. [2021-10-15 19:39:25,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:25,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1206 transitions. [2021-10-15 19:39:25,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,895 INFO L186 Difference]: Start difference. First operand has 238 places, 1274 transitions, 13921 flow. Second operand 3 states and 1206 transitions. [2021-10-15 19:39:25,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1606 transitions, 19278 flow [2021-10-15 19:39:25,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1606 transitions, 19277 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:39:25,992 INFO L242 Difference]: Finished difference. Result has 241 places, 1450 transitions, 17644 flow [2021-10-15 19:39:25,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=13920, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=17644, PETRI_PLACES=241, PETRI_TRANSITIONS=1450} [2021-10-15 19:39:25,994 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -58 predicate places. [2021-10-15 19:39:25,994 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 1450 transitions, 17644 flow [2021-10-15 19:39:25,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:25,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:25,996 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:26,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:26,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:26,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1616179030, now seen corresponding path program 1 times [2021-10-15 19:39:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:26,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870982994] [2021-10-15 19:39:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:26,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 83 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:39:26,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:26,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870982994] [2021-10-15 19:39:26,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870982994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:26,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577509983] [2021-10-15 19:39:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:26,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:26,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:26,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:39:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:39:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:39:27,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577509983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:27,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:27,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:39:27,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330128946] [2021-10-15 19:39:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:27,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:39:27,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:39:27,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1450 transitions, 17644 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:27,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:39:27,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:50,835 INFO L129 PetriNetUnfolder]: 5377/40986 cut-off events. [2021-10-15 19:39:50,835 INFO L130 PetriNetUnfolder]: For 72210/72210 co-relation queries the response was YES. [2021-10-15 19:39:50,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105906 conditions, 40986 events. 5377/40986 cut-off events. For 72210/72210 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 445842 event pairs, 0 based on Foata normal form. 139/41125 useless extension candidates. Maximal degree in co-relation 105888. Up to 20661 conditions per place. [2021-10-15 19:39:50,953 INFO L132 encePairwiseOnDemand]: 397/519 looper letters, 1655 selfloop transitions, 1037 changer transitions 0/2721 dead transitions. [2021-10-15 19:39:50,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 2721 transitions, 38449 flow [2021-10-15 19:39:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:39:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:39:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 767 transitions. [2021-10-15 19:39:50,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49261400128452154 [2021-10-15 19:39:50,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 767 transitions. [2021-10-15 19:39:50,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 767 transitions. [2021-10-15 19:39:50,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:50,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 767 transitions. [2021-10-15 19:39:50,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:50,961 INFO L186 Difference]: Start difference. First operand has 241 places, 1450 transitions, 17644 flow. Second operand 3 states and 767 transitions. [2021-10-15 19:39:50,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 2721 transitions, 38449 flow [2021-10-15 19:39:51,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 2721 transitions, 37779 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:51,096 INFO L242 Difference]: Finished difference. Result has 243 places, 2461 transitions, 37446 flow [2021-10-15 19:39:51,099 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=17286, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37446, PETRI_PLACES=243, PETRI_TRANSITIONS=2461} [2021-10-15 19:39:51,099 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -56 predicate places. [2021-10-15 19:39:51,099 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 2461 transitions, 37446 flow [2021-10-15 19:39:51,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:51,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:51,100 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:51,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-15 19:39:51,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:51,307 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:39:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash 739034871, now seen corresponding path program 1 times [2021-10-15 19:39:51,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:51,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068090347] [2021-10-15 19:39:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:51,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:39:51,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:51,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068090347] [2021-10-15 19:39:51,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068090347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:51,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:51,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:39:51,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745397786] [2021-10-15 19:39:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:39:51,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:39:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:39:51,420 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:39:51,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 2461 transitions, 37446 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:51,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:51,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:39:51,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:35,519 INFO L129 PetriNetUnfolder]: 3710/35590 cut-off events. [2021-10-15 19:40:35,519 INFO L130 PetriNetUnfolder]: For 86970/86970 co-relation queries the response was YES. [2021-10-15 19:40:35,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92962 conditions, 35590 events. 3710/35590 cut-off events. For 86970/86970 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 388100 event pairs, 0 based on Foata normal form. 889/36479 useless extension candidates. Maximal degree in co-relation 92941. Up to 18338 conditions per place. [2021-10-15 19:40:35,629 INFO L132 encePairwiseOnDemand]: 429/519 looper letters, 1363 selfloop transitions, 799 changer transitions 0/2191 dead transitions. [2021-10-15 19:40:35,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 2191 transitions, 33314 flow [2021-10-15 19:40:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:40:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:40:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2021-10-15 19:40:35,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47719974309569685 [2021-10-15 19:40:35,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2021-10-15 19:40:35,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2021-10-15 19:40:35,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:35,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2021-10-15 19:40:35,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:35,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:35,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:35,638 INFO L186 Difference]: Start difference. First operand has 243 places, 2461 transitions, 37446 flow. Second operand 3 states and 743 transitions. [2021-10-15 19:40:35,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 2191 transitions, 33314 flow [2021-10-15 19:40:35,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 2191 transitions, 31704 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:40:35,777 INFO L242 Difference]: Finished difference. Result has 244 places, 1827 transitions, 27538 flow [2021-10-15 19:40:35,780 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=24917, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1028, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27538, PETRI_PLACES=244, PETRI_TRANSITIONS=1827} [2021-10-15 19:40:35,780 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -55 predicate places. [2021-10-15 19:40:35,780 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 1827 transitions, 27538 flow [2021-10-15 19:40:35,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:35,781 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:35,781 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:35,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:40:35,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 313178051, now seen corresponding path program 1 times [2021-10-15 19:40:35,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:35,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377271180] [2021-10-15 19:40:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:35,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-15 19:40:35,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:35,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377271180] [2021-10-15 19:40:35,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377271180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:35,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:40:35,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:40:35,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465208489] [2021-10-15 19:40:35,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:40:35,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:40:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:40:35,891 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 519 [2021-10-15 19:40:35,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 1827 transitions, 27538 flow. Second operand has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:35,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:35,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 519 [2021-10-15 19:40:35,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:57,999 INFO L129 PetriNetUnfolder]: 6274/66468 cut-off events. [2021-10-15 19:40:57,999 INFO L130 PetriNetUnfolder]: For 158963/158963 co-relation queries the response was YES. [2021-10-15 19:40:58,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118446 conditions, 66468 events. 6274/66468 cut-off events. For 158963/158963 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 827100 event pairs, 0 based on Foata normal form. 665/67133 useless extension candidates. Maximal degree in co-relation 118425. Up to 7545 conditions per place. [2021-10-15 19:40:58,195 INFO L132 encePairwiseOnDemand]: 475/519 looper letters, 872 selfloop transitions, 217 changer transitions 0/2187 dead transitions. [2021-10-15 19:40:58,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 2187 transitions, 35263 flow [2021-10-15 19:40:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:40:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:40:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1258 transitions. [2021-10-15 19:40:58,200 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8079640333975594 [2021-10-15 19:40:58,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1258 transitions. [2021-10-15 19:40:58,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1258 transitions. [2021-10-15 19:40:58,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:58,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1258 transitions. [2021-10-15 19:40:58,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.3333333333333) internal successors, (1258), 3 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:58,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:58,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:58,210 INFO L186 Difference]: Start difference. First operand has 244 places, 1827 transitions, 27538 flow. Second operand 3 states and 1258 transitions. [2021-10-15 19:40:58,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 2187 transitions, 35263 flow [2021-10-15 19:40:58,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 2187 transitions, 34247 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:40:58,366 INFO L242 Difference]: Finished difference. Result has 247 places, 2033 transitions, 32000 flow [2021-10-15 19:40:58,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=26591, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32000, PETRI_PLACES=247, PETRI_TRANSITIONS=2033} [2021-10-15 19:40:58,369 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -52 predicate places. [2021-10-15 19:40:58,369 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 2033 transitions, 32000 flow [2021-10-15 19:40:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:58,370 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:58,370 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:58,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:40:58,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash 603368204, now seen corresponding path program 1 times [2021-10-15 19:40:58,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:58,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114321140] [2021-10-15 19:40:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:58,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 138 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-15 19:40:58,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:58,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114321140] [2021-10-15 19:40:58,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114321140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:58,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385379640] [2021-10-15 19:40:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:58,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:58,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:58,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:58,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:40:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:40:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-10-15 19:40:59,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385379640] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:59,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:59,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:40:59,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953695118] [2021-10-15 19:40:59,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:40:59,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:40:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:40:59,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:40:59,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 2033 transitions, 32000 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:59,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:59,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:40:59,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:43,607 INFO L129 PetriNetUnfolder]: 8594/94914 cut-off events. [2021-10-15 19:42:43,607 INFO L130 PetriNetUnfolder]: For 202487/202487 co-relation queries the response was YES. [2021-10-15 19:42:43,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243099 conditions, 94914 events. 8594/94914 cut-off events. For 202487/202487 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 1281367 event pairs, 0 based on Foata normal form. 1058/95972 useless extension candidates. Maximal degree in co-relation 243077. Up to 47424 conditions per place. [2021-10-15 19:42:43,955 INFO L132 encePairwiseOnDemand]: 422/519 looper letters, 2016 selfloop transitions, 1012 changer transitions 0/3070 dead transitions. [2021-10-15 19:42:43,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 3070 transitions, 52860 flow [2021-10-15 19:42:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2021-10-15 19:42:43,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5003211303789339 [2021-10-15 19:42:43,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2021-10-15 19:42:43,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2021-10-15 19:42:43,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:43,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2021-10-15 19:42:43,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:43,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:43,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:43,969 INFO L186 Difference]: Start difference. First operand has 247 places, 2033 transitions, 32000 flow. Second operand 3 states and 779 transitions. [2021-10-15 19:42:43,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 3070 transitions, 52860 flow [2021-10-15 19:42:44,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 3070 transitions, 52196 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:44,211 INFO L242 Difference]: Finished difference. Result has 249 places, 2648 transitions, 48186 flow [2021-10-15 19:42:44,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=30980, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48186, PETRI_PLACES=249, PETRI_TRANSITIONS=2648} [2021-10-15 19:42:44,214 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -50 predicate places. [2021-10-15 19:42:44,214 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 2648 transitions, 48186 flow [2021-10-15 19:42:44,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:44,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:44,215 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:44,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-15 19:42:44,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:42:44,429 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1634425628, now seen corresponding path program 1 times [2021-10-15 19:42:44,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:44,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753247672] [2021-10-15 19:42:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:44,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-15 19:42:44,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:44,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753247672] [2021-10-15 19:42:44,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753247672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:44,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316396371] [2021-10-15 19:42:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:44,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:44,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:44,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:42:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:42:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-15 19:42:45,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316396371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:45,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:42:45,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:42:45,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466147826] [2021-10-15 19:42:45,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:45,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:42:45,641 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 519 [2021-10-15 19:42:45,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 2648 transitions, 48186 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:45,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:45,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 519 [2021-10-15 19:42:45,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:06,908 INFO L129 PetriNetUnfolder]: 6656/89305 cut-off events. [2021-10-15 19:45:06,908 INFO L130 PetriNetUnfolder]: For 223708/223708 co-relation queries the response was YES. [2021-10-15 19:45:07,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226116 conditions, 89305 events. 6656/89305 cut-off events. For 223708/223708 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 1208265 event pairs, 0 based on Foata normal form. 1585/90890 useless extension candidates. Maximal degree in co-relation 226091. Up to 47832 conditions per place. [2021-10-15 19:45:07,215 INFO L132 encePairwiseOnDemand]: 418/519 looper letters, 1362 selfloop transitions, 1058 changer transitions 0/2455 dead transitions. [2021-10-15 19:45:07,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 2455 transitions, 45945 flow [2021-10-15 19:45:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:45:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:45:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2021-10-15 19:45:07,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47719974309569685 [2021-10-15 19:45:07,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2021-10-15 19:45:07,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2021-10-15 19:45:07,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:07,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2021-10-15 19:45:07,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:07,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:07,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:07,227 INFO L186 Difference]: Start difference. First operand has 249 places, 2648 transitions, 48186 flow. Second operand 3 states and 743 transitions. [2021-10-15 19:45:07,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 2455 transitions, 45945 flow [2021-10-15 19:45:07,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 2455 transitions, 44205 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:45:07,408 INFO L242 Difference]: Finished difference. Result has 249 places, 2217 transitions, 40528 flow [2021-10-15 19:45:07,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=38412, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40528, PETRI_PLACES=249, PETRI_TRANSITIONS=2217} [2021-10-15 19:45:07,410 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -50 predicate places. [2021-10-15 19:45:07,410 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 2217 transitions, 40528 flow [2021-10-15 19:45:07,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:07,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:07,411 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:07,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 19:45:07,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:45:07,625 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1360195708, now seen corresponding path program 1 times [2021-10-15 19:45:07,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:07,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440363688] [2021-10-15 19:45:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:07,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-15 19:45:07,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:07,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440363688] [2021-10-15 19:45:07,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440363688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:07,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280714477] [2021-10-15 19:45:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:07,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:07,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:07,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:07,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:45:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:45:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-15 19:45:08,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280714477] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:08,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:08,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:45:08,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130070820] [2021-10-15 19:45:08,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:45:08,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:45:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:45:08,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:45:08,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 2217 transitions, 40528 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:08,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:08,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:45:08,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:59,477 INFO L129 PetriNetUnfolder]: 6145/88158 cut-off events. [2021-10-15 19:46:59,477 INFO L130 PetriNetUnfolder]: For 196642/196642 co-relation queries the response was YES. [2021-10-15 19:46:59,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216602 conditions, 88158 events. 6145/88158 cut-off events. For 196642/196642 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 1193801 event pairs, 0 based on Foata normal form. 446/88604 useless extension candidates. Maximal degree in co-relation 216578. Up to 42329 conditions per place. [2021-10-15 19:46:59,789 INFO L132 encePairwiseOnDemand]: 401/519 looper letters, 1320 selfloop transitions, 958 changer transitions 0/2307 dead transitions. [2021-10-15 19:46:59,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 2307 transitions, 43300 flow [2021-10-15 19:46:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:46:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:46:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2021-10-15 19:46:59,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4849068721901092 [2021-10-15 19:46:59,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2021-10-15 19:46:59,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2021-10-15 19:46:59,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:59,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2021-10-15 19:46:59,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:59,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:59,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:59,803 INFO L186 Difference]: Start difference. First operand has 249 places, 2217 transitions, 40528 flow. Second operand 3 states and 755 transitions. [2021-10-15 19:46:59,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 2307 transitions, 43300 flow [2021-10-15 19:46:59,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 2307 transitions, 42289 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:46:59,991 INFO L242 Difference]: Finished difference. Result has 251 places, 2097 transitions, 39923 flow [2021-10-15 19:46:59,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=36995, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=958, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39923, PETRI_PLACES=251, PETRI_TRANSITIONS=2097} [2021-10-15 19:46:59,993 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -48 predicate places. [2021-10-15 19:46:59,993 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 2097 transitions, 39923 flow [2021-10-15 19:46:59,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:59,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:59,993 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:47:00,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:00,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:47:00,194 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 940109861, now seen corresponding path program 1 times [2021-10-15 19:47:00,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:00,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454727283] [2021-10-15 19:47:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:00,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 12 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-10-15 19:47:00,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:00,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454727283] [2021-10-15 19:47:00,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454727283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:00,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214720862] [2021-10-15 19:47:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:00,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:00,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:00,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:00,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:47:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:47:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-15 19:47:01,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214720862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:01,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:01,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:47:01,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173786587] [2021-10-15 19:47:01,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:47:01,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:47:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:47:01,707 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 519 [2021-10-15 19:47:01,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 2097 transitions, 39923 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:01,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:01,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 519 [2021-10-15 19:47:01,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:31,170 INFO L129 PetriNetUnfolder]: 4226/67668 cut-off events. [2021-10-15 19:48:31,170 INFO L130 PetriNetUnfolder]: For 148341/148341 co-relation queries the response was YES. [2021-10-15 19:48:31,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168840 conditions, 67668 events. 4226/67668 cut-off events. For 148341/148341 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 868400 event pairs, 0 based on Foata normal form. 253/67921 useless extension candidates. Maximal degree in co-relation 168815. Up to 42667 conditions per place. [2021-10-15 19:48:31,333 INFO L132 encePairwiseOnDemand]: 435/519 looper letters, 0 selfloop transitions, 0 changer transitions 1982/1982 dead transitions. [2021-10-15 19:48:31,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1982 transitions, 37150 flow [2021-10-15 19:48:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:48:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:48:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2021-10-15 19:48:31,337 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4624277456647399 [2021-10-15 19:48:31,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2021-10-15 19:48:31,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2021-10-15 19:48:31,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:31,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2021-10-15 19:48:31,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,347 INFO L186 Difference]: Start difference. First operand has 251 places, 2097 transitions, 39923 flow. Second operand 3 states and 720 transitions. [2021-10-15 19:48:31,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1982 transitions, 37150 flow [2021-10-15 19:48:31,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1982 transitions, 36392 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:31,482 INFO L242 Difference]: Finished difference. Result has 250 places, 0 transitions, 0 flow [2021-10-15 19:48:31,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=519, PETRI_DIFFERENCE_MINUEND_FLOW=31648, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=250, PETRI_TRANSITIONS=0} [2021-10-15 19:48:31,484 INFO L334 CegarLoopForPetriNet]: 299 programPoint places, -49 predicate places. [2021-10-15 19:48:31,484 INFO L470 AbstractCegarLoop]: Abstraction has has 250 places, 0 transitions, 0 flow [2021-10-15 19:48:31,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,487 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:48:31,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-15 19:48:31,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:48:31,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:48:31,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:48:31 BoogieIcfgContainer [2021-10-15 19:48:31,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:48:31,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:48:31,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:48:31,715 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:48:31,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:43" (3/4) ... [2021-10-15 19:48:31,719 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:48:31,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:48:31,778 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:48:31,782 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:48:31,785 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:48:32,000 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:48:32,000 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:48:32,002 INFO L168 Benchmark]: Toolchain (without parser) took 592122.88 ms. Allocated memory was 100.7 MB in the beginning and 4.7 GB in the end (delta: 4.6 GB). Free memory was 78.1 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 2.4 GB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,002 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 100.7 MB. Free memory is still 76.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:48:32,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1092.90 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 78.1 MB in the beginning and 87.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,003 INFO L168 Benchmark]: Boogie Procedure Inliner took 144.95 ms. Allocated memory is still 138.4 MB. Free memory was 87.3 MB in the beginning and 72.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,003 INFO L168 Benchmark]: Boogie Preprocessor took 93.90 ms. Allocated memory is still 138.4 MB. Free memory was 72.7 MB in the beginning and 63.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,004 INFO L168 Benchmark]: RCFGBuilder took 1928.38 ms. Allocated memory was 138.4 MB in the beginning and 190.8 MB in the end (delta: 52.4 MB). Free memory was 63.0 MB in the beginning and 120.6 MB in the end (delta: -57.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,004 INFO L168 Benchmark]: TraceAbstraction took 588568.90 ms. Allocated memory was 190.8 MB in the beginning and 4.7 GB in the end (delta: 4.5 GB). Free memory was 120.6 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,005 INFO L168 Benchmark]: Witness Printer took 285.53 ms. Allocated memory is still 4.7 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 36.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:48:32,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 100.7 MB. Free memory is still 76.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1092.90 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 78.1 MB in the beginning and 87.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 144.95 ms. Allocated memory is still 138.4 MB. Free memory was 87.3 MB in the beginning and 72.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.90 ms. Allocated memory is still 138.4 MB. Free memory was 72.7 MB in the beginning and 63.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1928.38 ms. Allocated memory was 138.4 MB in the beginning and 190.8 MB in the end (delta: 52.4 MB). Free memory was 63.0 MB in the beginning and 120.6 MB in the end (delta: -57.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 588568.90 ms. Allocated memory was 190.8 MB in the beginning and 4.7 GB in the end (delta: 4.5 GB). Free memory was 120.6 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. * Witness Printer took 285.53 ms. Allocated memory is still 4.7 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 36.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 1528]: 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, 302 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 51.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 588493.1ms, OverallIterations: 16, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 575745.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 263.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2610 SDtfs, 2628 SDslu, 0 SDs, 0 SdLazy, 8208 SolverSat, 1526 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8902.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2173 GetRequests, 2137 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 130.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48186occurred in iteration=13, 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: 563.0ms SsaConstructionTime, 1307.0ms SatisfiabilityAnalysisTime, 6386.7ms InterpolantComputationTime, 5872 NumberOfCodeBlocks, 5872 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 5848 ConstructedInterpolants, 0 QuantifiedInterpolants, 10738 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4404 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 24 InterpolantComputations, 16 PerfectInterpolantSequences, 3183/3261 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 19:48:32,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64500396-72df-467f-ad5a-b2e914cfb225/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...