./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label33.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_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/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_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label33.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/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_7a81fa6c-f5de-4939-98e9-d7f048035c19/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 ab2f82b3a20098c3c150387b3445f37093d89f89 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 20:17:33,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:17:33,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:17:33,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:17:33,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:17:33,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:17:33,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:17:33,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:17:33,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:17:33,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:17:33,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:17:33,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:17:33,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:17:33,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:17:33,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:17:33,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:17:33,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:17:33,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:17:33,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:17:33,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:17:33,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:17:33,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:17:33,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:17:33,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:17:33,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:17:33,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:17:33,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:17:33,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:17:33,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:17:33,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:17:33,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:17:33,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:17:33,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:17:33,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:17:33,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:17:33,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:17:33,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:17:33,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:17:33,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:17:33,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:17:33,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:17:33,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:17:33,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:17:33,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:17:33,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:17:33,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:17:33,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:17:33,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:17:33,508 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:17:33,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:17:33,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:17:33,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:17:33,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:17:33,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:17:33,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:17:33,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:17:33,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:17:33,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:17:33,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:17:33,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:17:33,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:17:33,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:17:33,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:17:33,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:17:33,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:17:33,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:17:33,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:17:33,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:17:33,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:17:33,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:17:33,513 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:17:33,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:17:33,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:17:33,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:17:33,518 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_7a81fa6c-f5de-4939-98e9-d7f048035c19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab2f82b3a20098c3c150387b3445f37093d89f89 [2021-10-15 20:17:33,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:17:33,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:17:33,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:17:33,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:17:33,947 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:17:33,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label33.c [2021-10-15 20:17:34,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/data/e7400259a/261a4373ecec4ba198f70ab8a9e4aa0c/FLAG44636e68e [2021-10-15 20:17:34,852 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:17:34,853 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/sv-benchmarks/c/eca-rers2012/Problem14_label33.c [2021-10-15 20:17:34,891 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/data/e7400259a/261a4373ecec4ba198f70ab8a9e4aa0c/FLAG44636e68e [2021-10-15 20:17:35,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/data/e7400259a/261a4373ecec4ba198f70ab8a9e4aa0c [2021-10-15 20:17:35,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:17:35,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:17:35,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:17:35,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:17:35,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:17:35,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:17:35" (1/1) ... [2021-10-15 20:17:35,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a5bf32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:35, skipping insertion in model container [2021-10-15 20:17:35,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:17:35" (1/1) ... [2021-10-15 20:17:35,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:17:35,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:17:35,418 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_7a81fa6c-f5de-4939-98e9-d7f048035c19/sv-benchmarks/c/eca-rers2012/Problem14_label33.c[5937,5950] [2021-10-15 20:17:35,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:17:35,735 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:17:35,785 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_7a81fa6c-f5de-4939-98e9-d7f048035c19/sv-benchmarks/c/eca-rers2012/Problem14_label33.c[5937,5950] [2021-10-15 20:17:36,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:17:36,057 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:17:36,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36 WrapperNode [2021-10-15 20:17:36,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:17:36,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:17:36,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:17:36,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:17:36,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:17:36,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:17:36,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:17:36,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:17:36,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:17:36,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:17:36,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:17:36,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:17:36,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (1/1) ... [2021-10-15 20:17:36,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:17:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:17:36,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:17:36,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:17:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:17:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:17:36,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:17:36,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:17:38,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:17:38,294 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:17:38,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:17:38 BoogieIcfgContainer [2021-10-15 20:17:38,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:17:38,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:17:38,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:17:38,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:17:38,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:17:35" (1/3) ... [2021-10-15 20:17:38,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d2a2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:17:38, skipping insertion in model container [2021-10-15 20:17:38,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:17:36" (2/3) ... [2021-10-15 20:17:38,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d2a2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:17:38, skipping insertion in model container [2021-10-15 20:17:38,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:17:38" (3/3) ... [2021-10-15 20:17:38,312 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label33.c [2021-10-15 20:17:38,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:17:38,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:17:38,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:17:38,403 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 20:17:38,403 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:17:38,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:17:38,601 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 20:17:38,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:17:38,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 422 events. 178/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 249 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-10-15 20:17:38,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:17:38,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 20:17:38,655 INFO L129 PetriNetUnfolder]: 53/164 cut-off events. [2021-10-15 20:17:38,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:17:38,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:38,656 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] [2021-10-15 20:17:38,657 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:38,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2021-10-15 20:17:38,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:38,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827978041] [2021-10-15 20:17:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:38,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:39,152 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 20:17:39,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:39,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827978041] [2021-10-15 20:17:39,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827978041] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:39,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:39,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:17:39,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245677875] [2021-10-15 20:17:39,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:39,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:17:39,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:39,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:39,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:39,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:39,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:40,659 INFO L129 PetriNetUnfolder]: 212/631 cut-off events. [2021-10-15 20:17:40,660 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:17:40,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 631 events. 212/631 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 603 event pairs, 0 based on Foata normal form. 61/420 useless extension candidates. Maximal degree in co-relation 1. Up to 353 conditions per place. [2021-10-15 20:17:40,671 INFO L132 encePairwiseOnDemand]: 185/422 looper letters, 436 selfloop transitions, 102 changer transitions 85/628 dead transitions. [2021-10-15 20:17:40,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 628 transitions, 2502 flow [2021-10-15 20:17:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:17:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:17:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2021-10-15 20:17:40,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6208530805687204 [2021-10-15 20:17:40,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2021-10-15 20:17:40,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2021-10-15 20:17:40,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:40,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2021-10-15 20:17:40,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:40,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:40,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:40,749 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 3 states and 786 transitions. [2021-10-15 20:17:40,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 628 transitions, 2502 flow [2021-10-15 20:17:40,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 628 transitions, 2502 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:17:40,795 INFO L242 Difference]: Finished difference. Result has 246 places, 368 transitions, 1316 flow [2021-10-15 20:17:40,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1316, PETRI_PLACES=246, PETRI_TRANSITIONS=368} [2021-10-15 20:17:40,799 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 4 predicate places. [2021-10-15 20:17:40,800 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 368 transitions, 1316 flow [2021-10-15 20:17:40,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:40,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:40,801 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:17:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:17:40,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:40,803 INFO L82 PathProgramCache]: Analyzing trace with hash 729196247, now seen corresponding path program 1 times [2021-10-15 20:17:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:40,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104424276] [2021-10-15 20:17:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:40,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:17:41,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:41,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104424276] [2021-10-15 20:17:41,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104424276] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:41,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:41,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:17:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925052608] [2021-10-15 20:17:41,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:41,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:17:41,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:41,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 368 transitions, 1316 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:41,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:41,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:41,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:42,323 INFO L129 PetriNetUnfolder]: 253/968 cut-off events. [2021-10-15 20:17:42,323 INFO L130 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2021-10-15 20:17:42,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 968 events. 253/968 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1742 event pairs, 0 based on Foata normal form. 121/1089 useless extension candidates. Maximal degree in co-relation 923. Up to 482 conditions per place. [2021-10-15 20:17:42,334 INFO L132 encePairwiseOnDemand]: 328/422 looper letters, 521 selfloop transitions, 83 changer transitions 0/609 dead transitions. [2021-10-15 20:17:42,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 609 transitions, 3210 flow [2021-10-15 20:17:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:17:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:17:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2021-10-15 20:17:42,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47788309636650866 [2021-10-15 20:17:42,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2021-10-15 20:17:42,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2021-10-15 20:17:42,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:42,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2021-10-15 20:17:42,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:42,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:42,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:42,355 INFO L186 Difference]: Start difference. First operand has 246 places, 368 transitions, 1316 flow. Second operand 3 states and 605 transitions. [2021-10-15 20:17:42,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 609 transitions, 3210 flow [2021-10-15 20:17:42,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 609 transitions, 2934 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:17:42,405 INFO L242 Difference]: Finished difference. Result has 188 places, 395 transitions, 1738 flow [2021-10-15 20:17:42,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1738, PETRI_PLACES=188, PETRI_TRANSITIONS=395} [2021-10-15 20:17:42,413 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -54 predicate places. [2021-10-15 20:17:42,414 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 395 transitions, 1738 flow [2021-10-15 20:17:42,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:42,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:42,415 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:17:42,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:17:42,416 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1708937139, now seen corresponding path program 1 times [2021-10-15 20:17:42,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:42,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331845460] [2021-10-15 20:17:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:42,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:17:42,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:42,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331845460] [2021-10-15 20:17:42,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331845460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:42,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:42,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:17:42,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502406004] [2021-10-15 20:17:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:17:42,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:17:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:17:42,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:42,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 395 transitions, 1738 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:42,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:42,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:42,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:44,620 INFO L129 PetriNetUnfolder]: 295/1544 cut-off events. [2021-10-15 20:17:44,621 INFO L130 PetriNetUnfolder]: For 420/420 co-relation queries the response was YES. [2021-10-15 20:17:44,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3636 conditions, 1544 events. 295/1544 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3737 event pairs, 0 based on Foata normal form. 60/1604 useless extension candidates. Maximal degree in co-relation 2061. Up to 988 conditions per place. [2021-10-15 20:17:44,633 INFO L132 encePairwiseOnDemand]: 385/422 looper letters, 738 selfloop transitions, 44 changer transitions 0/787 dead transitions. [2021-10-15 20:17:44,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 787 transitions, 4192 flow [2021-10-15 20:17:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:17:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:17:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2021-10-15 20:17:44,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44135071090047395 [2021-10-15 20:17:44,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2021-10-15 20:17:44,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2021-10-15 20:17:44,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:44,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2021-10-15 20:17:44,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:44,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:44,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:44,654 INFO L186 Difference]: Start difference. First operand has 188 places, 395 transitions, 1738 flow. Second operand 4 states and 745 transitions. [2021-10-15 20:17:44,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 787 transitions, 4192 flow [2021-10-15 20:17:44,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 787 transitions, 4020 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:17:44,687 INFO L242 Difference]: Finished difference. Result has 191 places, 434 transitions, 2047 flow [2021-10-15 20:17:44,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2047, PETRI_PLACES=191, PETRI_TRANSITIONS=434} [2021-10-15 20:17:44,688 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -51 predicate places. [2021-10-15 20:17:44,688 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 434 transitions, 2047 flow [2021-10-15 20:17:44,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:44,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:44,690 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:44,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:17:44,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:44,691 INFO L82 PathProgramCache]: Analyzing trace with hash -916192095, now seen corresponding path program 1 times [2021-10-15 20:17:44,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:44,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556494982] [2021-10-15 20:17:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:44,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-15 20:17:44,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:44,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556494982] [2021-10-15 20:17:44,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556494982] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:44,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:44,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:17:44,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148396766] [2021-10-15 20:17:44,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:17:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:44,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:17:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:17:44,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:44,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 434 transitions, 2047 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:44,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:44,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:44,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:46,763 INFO L129 PetriNetUnfolder]: 348/1982 cut-off events. [2021-10-15 20:17:46,763 INFO L130 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2021-10-15 20:17:46,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4776 conditions, 1982 events. 348/1982 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 3776 event pairs, 0 based on Foata normal form. 13/1995 useless extension candidates. Maximal degree in co-relation 3990. Up to 890 conditions per place. [2021-10-15 20:17:46,777 INFO L132 encePairwiseOnDemand]: 351/422 looper letters, 490 selfloop transitions, 15 changer transitions 178/688 dead transitions. [2021-10-15 20:17:46,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 688 transitions, 4199 flow [2021-10-15 20:17:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:17:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:17:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2021-10-15 20:17:46,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33175355450236965 [2021-10-15 20:17:46,783 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2021-10-15 20:17:46,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2021-10-15 20:17:46,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:46,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2021-10-15 20:17:46,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:46,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:46,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:46,796 INFO L186 Difference]: Start difference. First operand has 191 places, 434 transitions, 2047 flow. Second operand 4 states and 560 transitions. [2021-10-15 20:17:46,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 688 transitions, 4199 flow [2021-10-15 20:17:46,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 688 transitions, 4189 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-10-15 20:17:46,837 INFO L242 Difference]: Finished difference. Result has 196 places, 331 transitions, 1515 flow [2021-10-15 20:17:46,839 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1515, PETRI_PLACES=196, PETRI_TRANSITIONS=331} [2021-10-15 20:17:46,839 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -46 predicate places. [2021-10-15 20:17:46,839 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 331 transitions, 1515 flow [2021-10-15 20:17:46,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:46,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:46,841 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:17:46,842 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1467709680, now seen corresponding path program 1 times [2021-10-15 20:17:46,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:46,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171357364] [2021-10-15 20:17:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:46,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 215 proven. 130 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-15 20:17:47,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:47,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171357364] [2021-10-15 20:17:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171357364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:17:47,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081403056] [2021-10-15 20:17:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:47,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:17:47,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:17:47,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:17:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:47,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:17:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:17:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-15 20:17:48,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081403056] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:48,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:17:48,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:17:48,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485885507] [2021-10-15 20:17:48,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:48,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:17:48,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:48,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 331 transitions, 1515 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:48,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:48,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:48,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:49,915 INFO L129 PetriNetUnfolder]: 259/2220 cut-off events. [2021-10-15 20:17:49,916 INFO L130 PetriNetUnfolder]: For 872/872 co-relation queries the response was YES. [2021-10-15 20:17:49,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5130 conditions, 2220 events. 259/2220 cut-off events. For 872/872 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5982 event pairs, 0 based on Foata normal form. 61/2281 useless extension candidates. Maximal degree in co-relation 4474. Up to 1768 conditions per place. [2021-10-15 20:17:49,934 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 485 selfloop transitions, 79 changer transitions 0/569 dead transitions. [2021-10-15 20:17:49,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 569 transitions, 3415 flow [2021-10-15 20:17:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:17:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:17:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:17:49,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:17:49,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:17:49,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:17:49,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:49,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:17:49,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:49,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:49,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:49,949 INFO L186 Difference]: Start difference. First operand has 196 places, 331 transitions, 1515 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:17:49,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 569 transitions, 3415 flow [2021-10-15 20:17:49,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 569 transitions, 3372 flow, removed 13 selfloop flow, removed 2 redundant places. [2021-10-15 20:17:49,982 INFO L242 Difference]: Finished difference. Result has 197 places, 394 transitions, 2442 flow [2021-10-15 20:17:49,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2442, PETRI_PLACES=197, PETRI_TRANSITIONS=394} [2021-10-15 20:17:49,983 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -45 predicate places. [2021-10-15 20:17:49,984 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 394 transitions, 2442 flow [2021-10-15 20:17:49,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:49,984 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:49,985 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:50,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:17:50,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:50,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1261449754, now seen corresponding path program 1 times [2021-10-15 20:17:50,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:50,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848946557] [2021-10-15 20:17:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:50,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-15 20:17:50,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:50,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848946557] [2021-10-15 20:17:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848946557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:50,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:50,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:17:50,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164084697] [2021-10-15 20:17:50,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:50,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:17:50,430 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:50,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 394 transitions, 2442 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:50,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:50,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:50,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:52,385 INFO L129 PetriNetUnfolder]: 296/2613 cut-off events. [2021-10-15 20:17:52,385 INFO L130 PetriNetUnfolder]: For 1932/1932 co-relation queries the response was YES. [2021-10-15 20:17:52,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2613 events. 296/2613 cut-off events. For 1932/1932 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7692 event pairs, 0 based on Foata normal form. 37/2650 useless extension candidates. Maximal degree in co-relation 5621. Up to 2027 conditions per place. [2021-10-15 20:17:52,405 INFO L132 encePairwiseOnDemand]: 371/422 looper letters, 543 selfloop transitions, 58 changer transitions 0/606 dead transitions. [2021-10-15 20:17:52,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 606 transitions, 4330 flow [2021-10-15 20:17:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:17:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:17:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2021-10-15 20:17:52,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3941548183254344 [2021-10-15 20:17:52,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2021-10-15 20:17:52,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2021-10-15 20:17:52,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:52,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2021-10-15 20:17:52,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:52,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:52,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:52,424 INFO L186 Difference]: Start difference. First operand has 197 places, 394 transitions, 2442 flow. Second operand 3 states and 499 transitions. [2021-10-15 20:17:52,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 606 transitions, 4330 flow [2021-10-15 20:17:52,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 606 transitions, 3988 flow, removed 82 selfloop flow, removed 2 redundant places. [2021-10-15 20:17:52,462 INFO L242 Difference]: Finished difference. Result has 198 places, 431 transitions, 2746 flow [2021-10-15 20:17:52,463 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2746, PETRI_PLACES=198, PETRI_TRANSITIONS=431} [2021-10-15 20:17:52,464 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -44 predicate places. [2021-10-15 20:17:52,464 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 431 transitions, 2746 flow [2021-10-15 20:17:52,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:52,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:52,465 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:52,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:17:52,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1867847128, now seen corresponding path program 1 times [2021-10-15 20:17:52,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:52,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114614990] [2021-10-15 20:17:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:52,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 222 proven. 130 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-15 20:17:52,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:52,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114614990] [2021-10-15 20:17:52,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114614990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:17:52,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302711874] [2021-10-15 20:17:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:52,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:17:52,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:17:52,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:17:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:17:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:17:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-10-15 20:17:54,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302711874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:54,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:17:54,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 20:17:54,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186279800] [2021-10-15 20:17:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:54,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:17:54,548 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:54,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 431 transitions, 2746 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:54,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:54,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:54,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:57,181 INFO L129 PetriNetUnfolder]: 303/3154 cut-off events. [2021-10-15 20:17:57,181 INFO L130 PetriNetUnfolder]: For 2270/2270 co-relation queries the response was YES. [2021-10-15 20:17:57,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 3154 events. 303/3154 cut-off events. For 2270/2270 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9179 event pairs, 0 based on Foata normal form. 132/3286 useless extension candidates. Maximal degree in co-relation 6668. Up to 2360 conditions per place. [2021-10-15 20:17:57,204 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 491 selfloop transitions, 132 changer transitions 0/628 dead transitions. [2021-10-15 20:17:57,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 628 transitions, 4385 flow [2021-10-15 20:17:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:17:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:17:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:17:57,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:17:57,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:17:57,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:17:57,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:57,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:17:57,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:57,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:57,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:57,223 INFO L186 Difference]: Start difference. First operand has 198 places, 431 transitions, 2746 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:17:57,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 628 transitions, 4385 flow [2021-10-15 20:17:57,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 628 transitions, 4326 flow, removed 9 selfloop flow, removed 1 redundant places. [2021-10-15 20:17:57,261 INFO L242 Difference]: Finished difference. Result has 201 places, 453 transitions, 3440 flow [2021-10-15 20:17:57,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3440, PETRI_PLACES=201, PETRI_TRANSITIONS=453} [2021-10-15 20:17:57,263 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -41 predicate places. [2021-10-15 20:17:57,263 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 453 transitions, 3440 flow [2021-10-15 20:17:57,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:57,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:57,264 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-10-15 20:17:57,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:17:57,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:57,466 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash -814875796, now seen corresponding path program 1 times [2021-10-15 20:17:57,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:57,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884507208] [2021-10-15 20:17:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:57,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-10-15 20:17:57,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:57,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884507208] [2021-10-15 20:17:57,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884507208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:17:57,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137275216] [2021-10-15 20:17:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:57,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:57,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:17:57,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:17:57,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:17:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:17:58,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:17:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:17:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137275216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:59,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:17:59,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 20:17:59,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939951311] [2021-10-15 20:17:59,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:59,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:17:59,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:59,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 453 transitions, 3440 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:59,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:59,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:59,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:02,111 INFO L129 PetriNetUnfolder]: 376/3761 cut-off events. [2021-10-15 20:18:02,111 INFO L130 PetriNetUnfolder]: For 4108/4108 co-relation queries the response was YES. [2021-10-15 20:18:02,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9253 conditions, 3761 events. 376/3761 cut-off events. For 4108/4108 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12788 event pairs, 0 based on Foata normal form. 64/3825 useless extension candidates. Maximal degree in co-relation 8376. Up to 1924 conditions per place. [2021-10-15 20:18:02,139 INFO L132 encePairwiseOnDemand]: 348/422 looper letters, 580 selfloop transitions, 117 changer transitions 0/702 dead transitions. [2021-10-15 20:18:02,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 702 transitions, 6089 flow [2021-10-15 20:18:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:18:02,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:18:02,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:18:02,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:18:02,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:02,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:18:02,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:02,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:02,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:02,151 INFO L186 Difference]: Start difference. First operand has 201 places, 453 transitions, 3440 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:18:02,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 702 transitions, 6089 flow [2021-10-15 20:18:02,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 702 transitions, 5479 flow, removed 142 selfloop flow, removed 2 redundant places. [2021-10-15 20:18:02,206 INFO L242 Difference]: Finished difference. Result has 203 places, 518 transitions, 4349 flow [2021-10-15 20:18:02,208 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2990, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4349, PETRI_PLACES=203, PETRI_TRANSITIONS=518} [2021-10-15 20:18:02,208 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -39 predicate places. [2021-10-15 20:18:02,208 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 518 transitions, 4349 flow [2021-10-15 20:18:02,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:02,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:02,210 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:02,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:18:02,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:02,438 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash 132656657, now seen corresponding path program 1 times [2021-10-15 20:18:02,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:02,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464429043] [2021-10-15 20:18:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:02,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:18:02,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:02,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464429043] [2021-10-15 20:18:02,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464429043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:02,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:18:02,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:18:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477459236] [2021-10-15 20:18:02,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:18:02,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:18:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:18:02,669 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:02,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 518 transitions, 4349 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:02,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:02,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:02,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:05,686 INFO L129 PetriNetUnfolder]: 568/4843 cut-off events. [2021-10-15 20:18:05,686 INFO L130 PetriNetUnfolder]: For 5822/5822 co-relation queries the response was YES. [2021-10-15 20:18:05,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12363 conditions, 4843 events. 568/4843 cut-off events. For 5822/5822 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 19690 event pairs, 0 based on Foata normal form. 2/4845 useless extension candidates. Maximal degree in co-relation 11490. Up to 3086 conditions per place. [2021-10-15 20:18:05,717 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 625 selfloop transitions, 252 changer transitions 0/882 dead transitions. [2021-10-15 20:18:05,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 882 transitions, 8566 flow [2021-10-15 20:18:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:18:05,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:18:05,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:18:05,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:18:05,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:05,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:18:05,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:05,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:05,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:05,728 INFO L186 Difference]: Start difference. First operand has 203 places, 518 transitions, 4349 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:18:05,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 882 transitions, 8566 flow [2021-10-15 20:18:05,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 882 transitions, 8122 flow, removed 48 selfloop flow, removed 2 redundant places. [2021-10-15 20:18:05,800 INFO L242 Difference]: Finished difference. Result has 205 places, 707 transitions, 7408 flow [2021-10-15 20:18:05,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7408, PETRI_PLACES=205, PETRI_TRANSITIONS=707} [2021-10-15 20:18:05,801 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -37 predicate places. [2021-10-15 20:18:05,802 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 707 transitions, 7408 flow [2021-10-15 20:18:05,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:05,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:05,803 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:05,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:18:05,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1823307718, now seen corresponding path program 1 times [2021-10-15 20:18:05,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:05,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049025007] [2021-10-15 20:18:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:05,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 432 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-10-15 20:18:06,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:06,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049025007] [2021-10-15 20:18:06,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049025007] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:06,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:18:06,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:18:06,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100411388] [2021-10-15 20:18:06,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:18:06,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:18:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:18:06,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:06,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 707 transitions, 7408 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:06,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:06,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:06,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:09,832 INFO L129 PetriNetUnfolder]: 584/5095 cut-off events. [2021-10-15 20:18:09,832 INFO L130 PetriNetUnfolder]: For 8254/8254 co-relation queries the response was YES. [2021-10-15 20:18:09,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13450 conditions, 5095 events. 584/5095 cut-off events. For 8254/8254 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 21756 event pairs, 0 based on Foata normal form. 2/5097 useless extension candidates. Maximal degree in co-relation 12666. Up to 4600 conditions per place. [2021-10-15 20:18:09,852 INFO L132 encePairwiseOnDemand]: 391/422 looper letters, 717 selfloop transitions, 28 changer transitions 175/925 dead transitions. [2021-10-15 20:18:09,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 925 transitions, 9865 flow [2021-10-15 20:18:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:18:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:18:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2021-10-15 20:18:09,855 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.29798578199052134 [2021-10-15 20:18:09,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2021-10-15 20:18:09,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2021-10-15 20:18:09,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:09,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2021-10-15 20:18:09,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:09,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:09,864 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:09,864 INFO L186 Difference]: Start difference. First operand has 205 places, 707 transitions, 7408 flow. Second operand 4 states and 503 transitions. [2021-10-15 20:18:09,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 925 transitions, 9865 flow [2021-10-15 20:18:09,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 925 transitions, 9355 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:18:09,918 INFO L242 Difference]: Finished difference. Result has 209 places, 575 transitions, 5349 flow [2021-10-15 20:18:09,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5349, PETRI_PLACES=209, PETRI_TRANSITIONS=575} [2021-10-15 20:18:09,920 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -33 predicate places. [2021-10-15 20:18:09,920 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 575 transitions, 5349 flow [2021-10-15 20:18:09,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:09,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:09,922 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:09,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:18:09,922 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1357227771, now seen corresponding path program 2 times [2021-10-15 20:18:09,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:09,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966514874] [2021-10-15 20:18:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:09,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 473 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-10-15 20:18:10,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:10,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966514874] [2021-10-15 20:18:10,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966514874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:10,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101094986] [2021-10-15 20:18:10,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:18:10,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:10,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:18:10,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:18:10,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:18:10,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:18:10,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:18:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:18:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:18:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 459 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:18:13,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101094986] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:13,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:18:13,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-15 20:18:13,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458602877] [2021-10-15 20:18:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:18:13,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:18:13,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:18:13,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:13,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 575 transitions, 5349 flow. Second operand has 5 states, 5 states have (on average 55.0) internal successors, (275), 5 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 20:18:13,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:13,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:13,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:17,585 INFO L129 PetriNetUnfolder]: 392/5081 cut-off events. [2021-10-15 20:18:17,585 INFO L130 PetriNetUnfolder]: For 5314/5314 co-relation queries the response was YES. [2021-10-15 20:18:17,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12169 conditions, 5081 events. 392/5081 cut-off events. For 5314/5314 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 22759 event pairs, 0 based on Foata normal form. 36/5117 useless extension candidates. Maximal degree in co-relation 11384. Up to 2768 conditions per place. [2021-10-15 20:18:17,606 INFO L132 encePairwiseOnDemand]: 404/422 looper letters, 849 selfloop transitions, 81 changer transitions 0/935 dead transitions. [2021-10-15 20:18:17,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 935 transitions, 7692 flow [2021-10-15 20:18:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:18:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:18:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2021-10-15 20:18:17,610 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31990521327014215 [2021-10-15 20:18:17,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2021-10-15 20:18:17,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2021-10-15 20:18:17,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:17,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2021-10-15 20:18:17,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:17,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:17,619 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:17,619 INFO L186 Difference]: Start difference. First operand has 209 places, 575 transitions, 5349 flow. Second operand 5 states and 675 transitions. [2021-10-15 20:18:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 935 transitions, 7692 flow [2021-10-15 20:18:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 935 transitions, 7604 flow, removed 21 selfloop flow, removed 3 redundant places. [2021-10-15 20:18:17,667 INFO L242 Difference]: Finished difference. Result has 212 places, 560 transitions, 5333 flow [2021-10-15 20:18:17,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5333, PETRI_PLACES=212, PETRI_TRANSITIONS=560} [2021-10-15 20:18:17,668 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -30 predicate places. [2021-10-15 20:18:17,668 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 560 transitions, 5333 flow [2021-10-15 20:18:17,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.0) internal successors, (275), 5 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 20:18:17,669 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:17,670 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:17,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:18:17,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:18:17,886 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash -252441285, now seen corresponding path program 1 times [2021-10-15 20:18:17,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:17,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531379552] [2021-10-15 20:18:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:17,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2021-10-15 20:18:18,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531379552] [2021-10-15 20:18:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531379552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:18,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944080627] [2021-10-15 20:18:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:18,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:18:18,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:18:18,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:18:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:18:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:18:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 397 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-10-15 20:18:20,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944080627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:20,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:18:20,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 20:18:20,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324471179] [2021-10-15 20:18:20,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:18:20,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:18:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:18:20,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:20,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 560 transitions, 5333 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:20,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:20,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:20,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:24,716 INFO L129 PetriNetUnfolder]: 431/6010 cut-off events. [2021-10-15 20:18:24,716 INFO L130 PetriNetUnfolder]: For 7489/7489 co-relation queries the response was YES. [2021-10-15 20:18:24,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14442 conditions, 6010 events. 431/6010 cut-off events. For 7489/7489 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 28312 event pairs, 0 based on Foata normal form. 86/6096 useless extension candidates. Maximal degree in co-relation 13649. Up to 3566 conditions per place. [2021-10-15 20:18:24,750 INFO L132 encePairwiseOnDemand]: 366/422 looper letters, 649 selfloop transitions, 120 changer transitions 0/774 dead transitions. [2021-10-15 20:18:24,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 774 transitions, 7855 flow [2021-10-15 20:18:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:18:24,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:18:24,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:18:24,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:18:24,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:24,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:18:24,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:24,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:24,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:24,764 INFO L186 Difference]: Start difference. First operand has 212 places, 560 transitions, 5333 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:18:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 774 transitions, 7855 flow [2021-10-15 20:18:24,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 774 transitions, 7796 flow, removed 16 selfloop flow, removed 1 redundant places. [2021-10-15 20:18:24,833 INFO L242 Difference]: Finished difference. Result has 215 places, 587 transitions, 6450 flow [2021-10-15 20:18:24,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4882, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6450, PETRI_PLACES=215, PETRI_TRANSITIONS=587} [2021-10-15 20:18:24,835 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -27 predicate places. [2021-10-15 20:18:24,835 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 587 transitions, 6450 flow [2021-10-15 20:18:24,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:24,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:24,836 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:24,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:18:25,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:25,062 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1413719166, now seen corresponding path program 1 times [2021-10-15 20:18:25,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:25,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332557822] [2021-10-15 20:18:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:25,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 868 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-10-15 20:18:25,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:25,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332557822] [2021-10-15 20:18:25,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332557822] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:25,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:18:25,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:18:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079023638] [2021-10-15 20:18:25,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:18:25,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:18:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:18:25,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:25,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 587 transitions, 6450 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:25,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:25,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:25,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:30,243 INFO L129 PetriNetUnfolder]: 430/6899 cut-off events. [2021-10-15 20:18:30,244 INFO L130 PetriNetUnfolder]: For 11095/11095 co-relation queries the response was YES. [2021-10-15 20:18:30,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16523 conditions, 6899 events. 430/6899 cut-off events. For 11095/11095 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 36449 event pairs, 0 based on Foata normal form. 114/7013 useless extension candidates. Maximal degree in co-relation 15723. Up to 4329 conditions per place. [2021-10-15 20:18:30,277 INFO L132 encePairwiseOnDemand]: 365/422 looper letters, 585 selfloop transitions, 177 changer transitions 0/767 dead transitions. [2021-10-15 20:18:30,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 767 transitions, 8378 flow [2021-10-15 20:18:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:18:30,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 20:18:30,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:18:30,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:18:30,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:30,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:18:30,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:30,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:30,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:30,290 INFO L186 Difference]: Start difference. First operand has 215 places, 587 transitions, 6450 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:18:30,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 767 transitions, 8378 flow [2021-10-15 20:18:30,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 767 transitions, 7716 flow, removed 220 selfloop flow, removed 2 redundant places. [2021-10-15 20:18:30,359 INFO L242 Difference]: Finished difference. Result has 217 places, 592 transitions, 6740 flow [2021-10-15 20:18:30,360 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6740, PETRI_PLACES=217, PETRI_TRANSITIONS=592} [2021-10-15 20:18:30,360 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -25 predicate places. [2021-10-15 20:18:30,361 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 592 transitions, 6740 flow [2021-10-15 20:18:30,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:30,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:30,362 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:30,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:18:30,362 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash 478828072, now seen corresponding path program 1 times [2021-10-15 20:18:30,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:30,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251127313] [2021-10-15 20:18:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:30,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 1204 proven. 104 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-10-15 20:18:30,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:30,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251127313] [2021-10-15 20:18:30,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251127313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:30,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441136636] [2021-10-15 20:18:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:30,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:18:30,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:18:30,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:18:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:18:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:18:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 1343 trivial. 0 not checked. [2021-10-15 20:18:33,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441136636] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:33,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:18:33,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:18:33,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68894444] [2021-10-15 20:18:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:18:33,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:18:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:18:33,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:33,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 592 transitions, 6740 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:33,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:33,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:33,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:39,644 INFO L129 PetriNetUnfolder]: 509/8224 cut-off events. [2021-10-15 20:18:39,644 INFO L130 PetriNetUnfolder]: For 10706/10706 co-relation queries the response was YES. [2021-10-15 20:18:39,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19810 conditions, 8224 events. 509/8224 cut-off events. For 10706/10706 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 48644 event pairs, 0 based on Foata normal form. 1/8225 useless extension candidates. Maximal degree in co-relation 19010. Up to 4852 conditions per place. [2021-10-15 20:18:39,688 INFO L132 encePairwiseOnDemand]: 383/422 looper letters, 618 selfloop transitions, 221 changer transitions 0/844 dead transitions. [2021-10-15 20:18:39,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 844 transitions, 9955 flow [2021-10-15 20:18:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:18:39,693 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:18:39,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:18:39,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:18:39,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:39,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:18:39,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:39,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:39,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:39,701 INFO L186 Difference]: Start difference. First operand has 217 places, 592 transitions, 6740 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:18:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 844 transitions, 9955 flow [2021-10-15 20:18:39,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 844 transitions, 9533 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:18:39,785 INFO L242 Difference]: Finished difference. Result has 219 places, 669 transitions, 8543 flow [2021-10-15 20:18:39,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6386, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8543, PETRI_PLACES=219, PETRI_TRANSITIONS=669} [2021-10-15 20:18:39,786 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -23 predicate places. [2021-10-15 20:18:39,787 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 669 transitions, 8543 flow [2021-10-15 20:18:39,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:39,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:39,788 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:39,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 20:18:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:18:40,002 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2000356807, now seen corresponding path program 1 times [2021-10-15 20:18:40,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:40,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765223720] [2021-10-15 20:18:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:40,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 1424 proven. 155 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-10-15 20:18:40,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765223720] [2021-10-15 20:18:40,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765223720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:40,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902186825] [2021-10-15 20:18:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:40,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:18:40,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:18:40,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:18:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:18:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:18:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 1614 trivial. 0 not checked. [2021-10-15 20:18:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902186825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:43,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:18:43,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:18:43,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063941509] [2021-10-15 20:18:43,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:18:43,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:18:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:18:43,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:43,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 669 transitions, 8543 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:43,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:43,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:43,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:50,316 INFO L129 PetriNetUnfolder]: 434/8118 cut-off events. [2021-10-15 20:18:50,317 INFO L130 PetriNetUnfolder]: For 13212/13212 co-relation queries the response was YES. [2021-10-15 20:18:50,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19372 conditions, 8118 events. 434/8118 cut-off events. For 13212/13212 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 47640 event pairs, 0 based on Foata normal form. 83/8201 useless extension candidates. Maximal degree in co-relation 18575. Up to 5903 conditions per place. [2021-10-15 20:18:50,344 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 0 selfloop transitions, 0 changer transitions 784/784 dead transitions. [2021-10-15 20:18:50,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 784 transitions, 9484 flow [2021-10-15 20:18:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2021-10-15 20:18:50,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3609794628751975 [2021-10-15 20:18:50,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2021-10-15 20:18:50,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2021-10-15 20:18:50,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:50,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2021-10-15 20:18:50,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:50,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:50,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:50,355 INFO L186 Difference]: Start difference. First operand has 219 places, 669 transitions, 8543 flow. Second operand 3 states and 457 transitions. [2021-10-15 20:18:50,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 784 transitions, 9484 flow [2021-10-15 20:18:50,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 784 transitions, 9015 flow, removed 11 selfloop flow, removed 4 redundant places. [2021-10-15 20:18:50,419 INFO L242 Difference]: Finished difference. Result has 215 places, 0 transitions, 0 flow [2021-10-15 20:18:50,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6977, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=215, PETRI_TRANSITIONS=0} [2021-10-15 20:18:50,420 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -27 predicate places. [2021-10-15 20:18:50,420 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 0 transitions, 0 flow [2021-10-15 20:18:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:50,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:18:50,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-15 20:18:50,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:50,629 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:18:50,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:18:50 BoogieIcfgContainer [2021-10-15 20:18:50,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:18:50,637 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:18:50,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:18:50,637 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:18:50,638 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:17:38" (3/4) ... [2021-10-15 20:18:50,642 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:18:50,674 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:18:50,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:18:50,679 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:18:50,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:18:50,877 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:18:50,878 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:18:50,880 INFO L168 Benchmark]: Toolchain (without parser) took 75823.73 ms. Allocated memory was 100.7 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 64.9 MB in the beginning and 543.0 MB in the end (delta: -478.0 MB). Peak memory consumption was 727.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,881 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory is still 56.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:18:50,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1001.72 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 53.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 183.67 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 53.2 MB in the beginning and 96.9 MB in the end (delta: -43.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,883 INFO L168 Benchmark]: Boogie Preprocessor took 128.08 ms. Allocated memory is still 127.9 MB. Free memory was 96.9 MB in the beginning and 90.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,883 INFO L168 Benchmark]: RCFGBuilder took 1923.42 ms. Allocated memory is still 127.9 MB. Free memory was 90.6 MB in the beginning and 72.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,884 INFO L168 Benchmark]: TraceAbstraction took 72333.89 ms. Allocated memory was 127.9 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 71.8 MB in the beginning and 562.0 MB in the end (delta: -490.2 MB). Peak memory consumption was 691.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,884 INFO L168 Benchmark]: Witness Printer took 241.41 ms. Allocated memory is still 1.3 GB. Free memory was 562.0 MB in the beginning and 543.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:18:50,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory is still 56.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1001.72 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 53.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 183.67 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 53.2 MB in the beginning and 96.9 MB in the end (delta: -43.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 128.08 ms. Allocated memory is still 127.9 MB. Free memory was 96.9 MB in the beginning and 90.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1923.42 ms. Allocated memory is still 127.9 MB. Free memory was 90.6 MB in the beginning and 72.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 72333.89 ms. Allocated memory was 127.9 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 71.8 MB in the beginning and 562.0 MB in the end (delta: -490.2 MB). Peak memory consumption was 691.5 MB. Max. memory is 16.1 GB. * Witness Printer took 241.41 ms. Allocated memory is still 1.3 GB. Free memory was 562.0 MB in the beginning and 543.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 188]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 72243.6ms, OverallIterations: 15, TraceHistogramMax: 7, EmptinessCheckTime: 0.0ms, AutomataDifference: 49351.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 237.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1251 SDtfs, 2319 SDslu, 0 SDs, 0 SdLazy, 7835 SolverSat, 1151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9545.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3488 GetRequests, 3447 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 236.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8543occurred in iteration=14, InterpolantAutomatonStates: 50, 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: 528.9ms SsaConstructionTime, 1769.6ms SatisfiabilityAnalysisTime, 14483.8ms InterpolantComputationTime, 9163 NumberOfCodeBlocks, 9163 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 9141 ConstructedInterpolants, 0 QuantifiedInterpolants, 30823 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4559 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 22 InterpolantComputations, 15 PerfectInterpolantSequences, 15063/16172 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 20:18:50,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a81fa6c-f5de-4939-98e9-d7f048035c19/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...