./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label24.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label24.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY --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 b3ef3977d042afb4071915ce97341123de4af0d70f58c82feb0983ea770e3ba0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:35:15,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:35:15,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:35:15,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:35:15,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:35:15,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:35:15,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:35:15,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:35:15,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:35:15,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:35:15,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:35:15,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:35:15,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:35:15,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:35:15,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:35:15,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:35:15,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:35:15,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:35:15,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:35:15,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:35:15,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:35:15,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:35:15,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:35:15,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:35:15,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:35:15,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:35:15,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:35:15,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:35:15,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:35:15,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:35:15,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:35:15,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:35:15,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:35:15,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:35:15,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:35:15,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:35:15,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:35:15,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:35:15,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:35:15,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:35:15,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:35:15,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:35:15,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:35:15,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:35:15,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:35:15,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:35:15,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:35:15,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:35:15,396 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:35:15,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:35:15,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:35:15,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:35:15,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:35:15,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:35:15,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:35:15,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:35:15,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:35:15,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:35:15,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:35:15,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:35:15,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:35:15,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:35:15,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:35:15,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:35:15,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:35:15,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:35:15,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:35:15,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:35:15,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:35:15,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:35:15,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:35:15,403 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:35:15,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:35:15,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:35:15,404 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_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ef3977d042afb4071915ce97341123de4af0d70f58c82feb0983ea770e3ba0 [2021-11-07 07:35:15,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:35:15,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:35:15,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:35:15,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:35:15,731 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:35:15,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem17_label24.c [2021-11-07 07:35:15,813 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/data/a86a8bc7f/8defc154a8654fb8ab7384438e75edab/FLAG552d2229a [2021-11-07 07:35:16,754 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:35:16,755 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/sv-benchmarks/c/eca-rers2012/Problem17_label24.c [2021-11-07 07:35:16,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/data/a86a8bc7f/8defc154a8654fb8ab7384438e75edab/FLAG552d2229a [2021-11-07 07:35:17,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/data/a86a8bc7f/8defc154a8654fb8ab7384438e75edab [2021-11-07 07:35:17,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:35:17,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:35:17,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:35:17,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:35:17,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:35:17,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:35:17" (1/1) ... [2021-11-07 07:35:17,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c47001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:17, skipping insertion in model container [2021-11-07 07:35:17,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:35:17" (1/1) ... [2021-11-07 07:35:17,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:35:17,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:35:17,791 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_fbad7387-a778-4fce-aa18-d0c1410e9238/sv-benchmarks/c/eca-rers2012/Problem17_label24.c[8922,8935] [2021-11-07 07:35:18,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:35:18,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:35:18,805 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_fbad7387-a778-4fce-aa18-d0c1410e9238/sv-benchmarks/c/eca-rers2012/Problem17_label24.c[8922,8935] [2021-11-07 07:35:19,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:35:19,498 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:35:19,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19 WrapperNode [2021-11-07 07:35:19,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:35:19,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:35:19,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:35:19,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:35:19,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:19,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:35:20,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:35:20,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:35:20,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:35:20,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:35:20,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:35:20,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:35:20,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:35:20,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (1/1) ... [2021-11-07 07:35:20,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:35:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:35:20,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:35:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:35:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:35:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:35:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:35:20,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:35:25,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:35:25,942 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 07:35:25,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:35:25 BoogieIcfgContainer [2021-11-07 07:35:25,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:35:25,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:35:25,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:35:25,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:35:25,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:35:17" (1/3) ... [2021-11-07 07:35:25,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21205d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:35:25, skipping insertion in model container [2021-11-07 07:35:25,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:19" (2/3) ... [2021-11-07 07:35:25,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21205d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:35:25, skipping insertion in model container [2021-11-07 07:35:25,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:35:25" (3/3) ... [2021-11-07 07:35:25,959 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label24.c [2021-11-07 07:35:25,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:35:25,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:35:26,065 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:35:26,080 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, mAutomataTypeConcurrency=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 [2021-11-07 07:35:26,080 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:35:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:35:26,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:26,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:26,145 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -634083006, now seen corresponding path program 1 times [2021-11-07 07:35:26,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:26,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523890782] [2021-11-07 07:35:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:26,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:26,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:26,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523890782] [2021-11-07 07:35:26,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523890782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:26,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:26,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:35:26,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938138430] [2021-11-07 07:35:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:26,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:26,540 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:30,459 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-07 07:35:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 07:35:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:30,489 INFO L225 Difference]: With dead ends: 1644 [2021-11-07 07:35:30,489 INFO L226 Difference]: Without dead ends: 977 [2021-11-07 07:35:30,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-07 07:35:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-07 07:35:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-07 07:35:30,651 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 60 [2021-11-07 07:35:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:30,653 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-07 07:35:30,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-07 07:35:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 07:35:30,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:30,668 INFO L513 BasicCegarLoop]: 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:30,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:35:30,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash 373934106, now seen corresponding path program 1 times [2021-11-07 07:35:30,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:30,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922098068] [2021-11-07 07:35:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:30,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:30,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:30,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922098068] [2021-11-07 07:35:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922098068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:30,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:30,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:35:30,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268508614] [2021-11-07 07:35:30,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:30,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:30,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:30,994 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:34,900 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-11-07 07:35:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-07 07:35:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:34,916 INFO L225 Difference]: With dead ends: 2813 [2021-11-07 07:35:34,917 INFO L226 Difference]: Without dead ends: 1844 [2021-11-07 07:35:34,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-07 07:35:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-11-07 07:35:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-11-07 07:35:35,005 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 127 [2021-11-07 07:35:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:35,008 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-11-07 07:35:35,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-11-07 07:35:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:35:35,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:35,022 INFO L513 BasicCegarLoop]: 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:35,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:35:35,023 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:35,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1612782126, now seen corresponding path program 1 times [2021-11-07 07:35:35,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:35,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865176929] [2021-11-07 07:35:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:35,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:35,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:35,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865176929] [2021-11-07 07:35:35,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865176929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:35,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:35,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396740394] [2021-11-07 07:35:35,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:35,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:35,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:35,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:35,297 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:38,847 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-11-07 07:35:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:38,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 07:35:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:38,869 INFO L225 Difference]: With dead ends: 4552 [2021-11-07 07:35:38,869 INFO L226 Difference]: Without dead ends: 2713 [2021-11-07 07:35:38,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-07 07:35:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-11-07 07:35:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-11-07 07:35:38,952 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 130 [2021-11-07 07:35:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:38,954 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-11-07 07:35:38,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-11-07 07:35:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-07 07:35:38,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:38,959 INFO L513 BasicCegarLoop]: 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:38,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:35:38,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1390509399, now seen corresponding path program 1 times [2021-11-07 07:35:38,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:38,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45186682] [2021-11-07 07:35:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:38,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 07:35:39,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:39,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45186682] [2021-11-07 07:35:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45186682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:39,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:39,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:35:39,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558619285] [2021-11-07 07:35:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:39,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:39,195 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:42,624 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-11-07 07:35:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-07 07:35:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:42,655 INFO L225 Difference]: With dead ends: 7984 [2021-11-07 07:35:42,656 INFO L226 Difference]: Without dead ends: 4421 [2021-11-07 07:35:42,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-07 07:35:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-11-07 07:35:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-11-07 07:35:42,773 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 199 [2021-11-07 07:35:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:42,774 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-11-07 07:35:42,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-11-07 07:35:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-07 07:35:42,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:42,779 INFO L513 BasicCegarLoop]: 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:42,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:35:42,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash -11472155, now seen corresponding path program 1 times [2021-11-07 07:35:42,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:42,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018519925] [2021-11-07 07:35:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:42,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:42,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:42,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018519925] [2021-11-07 07:35:42,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018519925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:42,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:42,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:42,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100389889] [2021-11-07 07:35:42,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:42,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:42,967 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. 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) [2021-11-07 07:35:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:45,284 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-11-07 07:35:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:45,290 INFO L78 Accepts]: Start accepts. 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) Word has length 212 [2021-11-07 07:35:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:45,327 INFO L225 Difference]: With dead ends: 9273 [2021-11-07 07:35:45,327 INFO L226 Difference]: Without dead ends: 5704 [2021-11-07 07:35:45,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-11-07 07:35:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-11-07 07:35:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-11-07 07:35:45,497 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 212 [2021-11-07 07:35:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:45,499 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-11-07 07:35:45,499 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) [2021-11-07 07:35:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-11-07 07:35:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-07 07:35:45,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:45,506 INFO L513 BasicCegarLoop]: 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:45,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:35:45,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1357792544, now seen corresponding path program 1 times [2021-11-07 07:35:45,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:45,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087289844] [2021-11-07 07:35:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:45,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 07:35:45,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:45,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087289844] [2021-11-07 07:35:45,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087289844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:45,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:45,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:45,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182126664] [2021-11-07 07:35:45,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:45,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:45,683 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:48,367 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-11-07 07:35:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-07 07:35:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:48,430 INFO L225 Difference]: With dead ends: 14376 [2021-11-07 07:35:48,430 INFO L226 Difference]: Without dead ends: 8673 [2021-11-07 07:35:48,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-11-07 07:35:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-11-07 07:35:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-11-07 07:35:48,622 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 214 [2021-11-07 07:35:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:48,623 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-11-07 07:35:48,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-11-07 07:35:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-07 07:35:48,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:48,631 INFO L513 BasicCegarLoop]: 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:48,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:35:48,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1325464515, now seen corresponding path program 1 times [2021-11-07 07:35:48,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:48,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56488601] [2021-11-07 07:35:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:48,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-07 07:35:48,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:48,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56488601] [2021-11-07 07:35:48,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56488601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:48,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:48,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:48,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024842326] [2021-11-07 07:35:48,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:48,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:48,846 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:51,451 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2021-11-07 07:35:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-11-07 07:35:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:51,494 INFO L225 Difference]: With dead ends: 14315 [2021-11-07 07:35:51,495 INFO L226 Difference]: Without dead ends: 7790 [2021-11-07 07:35:51,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-11-07 07:35:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2021-11-07 07:35:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.1186288355372962) internal successors, (8713), 7789 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2021-11-07 07:35:51,701 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 292 [2021-11-07 07:35:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:51,702 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2021-11-07 07:35:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2021-11-07 07:35:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-07 07:35:51,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:51,714 INFO L513 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:51,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:35:51,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2130053414, now seen corresponding path program 1 times [2021-11-07 07:35:51,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:51,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179458060] [2021-11-07 07:35:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:51,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-07 07:35:51,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:51,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179458060] [2021-11-07 07:35:51,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179458060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:51,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:51,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761928690] [2021-11-07 07:35:51,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:51,960 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:54,499 INFO L93 Difference]: Finished difference Result 18558 states and 20949 transitions. [2021-11-07 07:35:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2021-11-07 07:35:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:54,536 INFO L225 Difference]: With dead ends: 18558 [2021-11-07 07:35:54,536 INFO L226 Difference]: Without dead ends: 10770 [2021-11-07 07:35:54,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2021-11-07 07:35:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 9916. [2021-11-07 07:35:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9915 states have (on average 1.1232476046394353) internal successors, (11137), 9915 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 11137 transitions. [2021-11-07 07:35:54,847 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 11137 transitions. Word has length 332 [2021-11-07 07:35:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:54,848 INFO L470 AbstractCegarLoop]: Abstraction has 9916 states and 11137 transitions. [2021-11-07 07:35:54,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 11137 transitions. [2021-11-07 07:35:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-07 07:35:54,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:54,862 INFO L513 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:54,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:35:54,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash 273177675, now seen corresponding path program 1 times [2021-11-07 07:35:54,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:54,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88977806] [2021-11-07 07:35:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:54,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-07 07:35:55,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:55,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88977806] [2021-11-07 07:35:55,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88977806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:55,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:55,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:55,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491554105] [2021-11-07 07:35:55,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:55,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:55,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:55,123 INFO L87 Difference]: Start difference. First operand 9916 states and 11137 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:58,098 INFO L93 Difference]: Finished difference Result 27952 states and 31474 transitions. [2021-11-07 07:35:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 349 [2021-11-07 07:35:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:58,143 INFO L225 Difference]: With dead ends: 27952 [2021-11-07 07:35:58,143 INFO L226 Difference]: Without dead ends: 18038 [2021-11-07 07:35:58,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18038 states. [2021-11-07 07:35:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18038 to 17163. [2021-11-07 07:35:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17163 states, 17162 states have (on average 1.1156625101969468) internal successors, (19147), 17162 states have internal predecessors, (19147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17163 states to 17163 states and 19147 transitions. [2021-11-07 07:35:58,492 INFO L78 Accepts]: Start accepts. Automaton has 17163 states and 19147 transitions. Word has length 349 [2021-11-07 07:35:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:58,493 INFO L470 AbstractCegarLoop]: Abstraction has 17163 states and 19147 transitions. [2021-11-07 07:35:58,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 17163 states and 19147 transitions. [2021-11-07 07:35:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-07 07:35:58,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:58,513 INFO L513 BasicCegarLoop]: 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:58,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:35:58,514 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash 903485880, now seen corresponding path program 1 times [2021-11-07 07:35:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:58,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048029056] [2021-11-07 07:35:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:58,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:58,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:58,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048029056] [2021-11-07 07:35:58,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048029056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:58,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:58,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:35:58,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305630575] [2021-11-07 07:35:58,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:35:58,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:35:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:35:58,889 INFO L87 Difference]: Start difference. First operand 17163 states and 19147 transitions. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:02,758 INFO L93 Difference]: Finished difference Result 42008 states and 46867 transitions. [2021-11-07 07:36:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:36:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 399 [2021-11-07 07:36:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:02,829 INFO L225 Difference]: With dead ends: 42008 [2021-11-07 07:36:02,829 INFO L226 Difference]: Without dead ends: 24422 [2021-11-07 07:36:02,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:36:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24422 states. [2021-11-07 07:36:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24422 to 24420. [2021-11-07 07:36:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24420 states, 24419 states have (on average 1.1172857201359596) internal successors, (27283), 24419 states have internal predecessors, (27283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24420 states to 24420 states and 27283 transitions. [2021-11-07 07:36:03,438 INFO L78 Accepts]: Start accepts. Automaton has 24420 states and 27283 transitions. Word has length 399 [2021-11-07 07:36:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:03,439 INFO L470 AbstractCegarLoop]: Abstraction has 24420 states and 27283 transitions. [2021-11-07 07:36:03,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24420 states and 27283 transitions. [2021-11-07 07:36:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-07 07:36:03,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:03,459 INFO L513 BasicCegarLoop]: 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:03,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:36:03,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash 231337437, now seen corresponding path program 1 times [2021-11-07 07:36:03,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:03,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037973487] [2021-11-07 07:36:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:03,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-07 07:36:03,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:03,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037973487] [2021-11-07 07:36:03,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037973487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:03,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:03,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:03,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24858555] [2021-11-07 07:36:03,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:03,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:03,704 INFO L87 Difference]: Start difference. First operand 24420 states and 27283 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:06,731 INFO L93 Difference]: Finished difference Result 55245 states and 61737 transitions. [2021-11-07 07:36:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 420 [2021-11-07 07:36:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:06,793 INFO L225 Difference]: With dead ends: 55245 [2021-11-07 07:36:06,794 INFO L226 Difference]: Without dead ends: 30827 [2021-11-07 07:36:06,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30827 states. [2021-11-07 07:36:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30827 to 23983. [2021-11-07 07:36:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23983 states, 23982 states have (on average 1.1184221499457927) internal successors, (26822), 23982 states have internal predecessors, (26822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23983 states to 23983 states and 26822 transitions. [2021-11-07 07:36:07,431 INFO L78 Accepts]: Start accepts. Automaton has 23983 states and 26822 transitions. Word has length 420 [2021-11-07 07:36:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:07,432 INFO L470 AbstractCegarLoop]: Abstraction has 23983 states and 26822 transitions. [2021-11-07 07:36:07,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23983 states and 26822 transitions. [2021-11-07 07:36:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-07 07:36:07,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:07,450 INFO L513 BasicCegarLoop]: 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:07,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:36:07,451 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash 782937122, now seen corresponding path program 1 times [2021-11-07 07:36:07,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:07,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700632492] [2021-11-07 07:36:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:07,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-07 07:36:07,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:07,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700632492] [2021-11-07 07:36:07,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700632492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:07,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:07,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:07,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634882567] [2021-11-07 07:36:07,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:07,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:07,833 INFO L87 Difference]: Start difference. First operand 23983 states and 26822 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:10,843 INFO L93 Difference]: Finished difference Result 57340 states and 64370 transitions. [2021-11-07 07:36:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 421 [2021-11-07 07:36:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:10,885 INFO L225 Difference]: With dead ends: 57340 [2021-11-07 07:36:10,886 INFO L226 Difference]: Without dead ends: 33359 [2021-11-07 07:36:10,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33359 states. [2021-11-07 07:36:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33359 to 33341. [2021-11-07 07:36:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33341 states, 33340 states have (on average 1.1147870425914816) internal successors, (37167), 33340 states have internal predecessors, (37167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33341 states to 33341 states and 37167 transitions. [2021-11-07 07:36:11,598 INFO L78 Accepts]: Start accepts. Automaton has 33341 states and 37167 transitions. Word has length 421 [2021-11-07 07:36:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:11,600 INFO L470 AbstractCegarLoop]: Abstraction has 33341 states and 37167 transitions. [2021-11-07 07:36:11,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33341 states and 37167 transitions. [2021-11-07 07:36:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-11-07 07:36:11,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:11,618 INFO L513 BasicCegarLoop]: 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:11,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:36:11,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -649020687, now seen corresponding path program 1 times [2021-11-07 07:36:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:11,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897114891] [2021-11-07 07:36:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:11,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-07 07:36:12,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:12,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897114891] [2021-11-07 07:36:12,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897114891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:12,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:12,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:12,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898219325] [2021-11-07 07:36:12,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:12,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:12,077 INFO L87 Difference]: Start difference. First operand 33341 states and 37167 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:15,050 INFO L93 Difference]: Finished difference Result 75204 states and 83736 transitions. [2021-11-07 07:36:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 428 [2021-11-07 07:36:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:15,107 INFO L225 Difference]: With dead ends: 75204 [2021-11-07 07:36:15,107 INFO L226 Difference]: Without dead ends: 40158 [2021-11-07 07:36:15,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40158 states. [2021-11-07 07:36:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40158 to 38863. [2021-11-07 07:36:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38863 states, 38862 states have (on average 1.106324944676033) internal successors, (42994), 38862 states have internal predecessors, (42994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38863 states to 38863 states and 42994 transitions. [2021-11-07 07:36:15,935 INFO L78 Accepts]: Start accepts. Automaton has 38863 states and 42994 transitions. Word has length 428 [2021-11-07 07:36:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:15,935 INFO L470 AbstractCegarLoop]: Abstraction has 38863 states and 42994 transitions. [2021-11-07 07:36:15,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 38863 states and 42994 transitions. [2021-11-07 07:36:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-07 07:36:15,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:15,956 INFO L513 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:15,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:36:15,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:15,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1856333145, now seen corresponding path program 1 times [2021-11-07 07:36:15,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:15,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910504998] [2021-11-07 07:36:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:15,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 115 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:16,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:16,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910504998] [2021-11-07 07:36:16,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910504998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:16,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397689751] [2021-11-07 07:36:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:16,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:16,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:16,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:36:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:36:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 115 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:20,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397689751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:20,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:20,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-11-07 07:36:20,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983188398] [2021-11-07 07:36:20,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:36:20,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:36:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:36:20,797 INFO L87 Difference]: Start difference. First operand 38863 states and 42994 transitions. Second operand has 9 states, 9 states have (on average 92.44444444444444) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:30,608 INFO L93 Difference]: Finished difference Result 104591 states and 115106 transitions. [2021-11-07 07:36:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:36:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 92.44444444444444) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 446 [2021-11-07 07:36:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:30,694 INFO L225 Difference]: With dead ends: 104591 [2021-11-07 07:36:30,694 INFO L226 Difference]: Without dead ends: 65730 [2021-11-07 07:36:30,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:36:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65730 states. [2021-11-07 07:36:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65730 to 39713. [2021-11-07 07:36:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39713 states, 39712 states have (on average 1.104175060435133) internal successors, (43849), 39712 states have internal predecessors, (43849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39713 states to 39713 states and 43849 transitions. [2021-11-07 07:36:31,537 INFO L78 Accepts]: Start accepts. Automaton has 39713 states and 43849 transitions. Word has length 446 [2021-11-07 07:36:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 39713 states and 43849 transitions. [2021-11-07 07:36:31,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 92.44444444444444) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 39713 states and 43849 transitions. [2021-11-07 07:36:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-07 07:36:31,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:31,549 INFO L513 BasicCegarLoop]: 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:31,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 07:36:31,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbad7387-a778-4fce-aa18-d0c1410e9238/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:36:31,765 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash 653691728, now seen corresponding path program 1 times [2021-11-07 07:36:31,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:31,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972206612] [2021-11-07 07:36:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:31,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 07:36:32,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:32,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972206612] [2021-11-07 07:36:32,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972206612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:32,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:32,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:32,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403794693] [2021-11-07 07:36:32,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:32,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:32,219 INFO L87 Difference]: Start difference. First operand 39713 states and 43849 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:35,374 INFO L93 Difference]: Finished difference Result 89201 states and 98880 transitions. [2021-11-07 07:36:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 464 [2021-11-07 07:36:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:35,423 INFO L225 Difference]: With dead ends: 89201 [2021-11-07 07:36:35,423 INFO L226 Difference]: Without dead ends: 46924 [2021-11-07 07:36:35,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-07 07:36:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 46919. [2021-11-07 07:36:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46919 states, 46918 states have (on average 1.0877488383989087) internal successors, (51035), 46918 states have internal predecessors, (51035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46919 states to 46919 states and 51035 transitions. [2021-11-07 07:36:36,252 INFO L78 Accepts]: Start accepts. Automaton has 46919 states and 51035 transitions. Word has length 464 [2021-11-07 07:36:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:36,253 INFO L470 AbstractCegarLoop]: Abstraction has 46919 states and 51035 transitions. [2021-11-07 07:36:36,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 46919 states and 51035 transitions. [2021-11-07 07:36:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2021-11-07 07:36:36,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:36,299 INFO L513 BasicCegarLoop]: 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, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:36,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:36:36,300 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:36,301 INFO L85 PathProgramCache]: Analyzing trace with hash -514944544, now seen corresponding path program 1 times [2021-11-07 07:36:36,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:36,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585390188] [2021-11-07 07:36:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:36,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-07 07:36:36,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:36,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585390188] [2021-11-07 07:36:36,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585390188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:36,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:36,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:36,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105253024] [2021-11-07 07:36:36,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:36,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:36,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:36,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:36,942 INFO L87 Difference]: Start difference. First operand 46919 states and 51035 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:40,005 INFO L93 Difference]: Finished difference Result 98941 states and 107959 transitions. [2021-11-07 07:36:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 829 [2021-11-07 07:36:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:40,067 INFO L225 Difference]: With dead ends: 98941 [2021-11-07 07:36:40,067 INFO L226 Difference]: Without dead ends: 52874 [2021-11-07 07:36:40,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52874 states. [2021-11-07 07:36:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52874 to 47763. [2021-11-07 07:36:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47763 states, 47762 states have (on average 1.0890247477073824) internal successors, (52014), 47762 states have internal predecessors, (52014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47763 states to 47763 states and 52014 transitions. [2021-11-07 07:36:40,927 INFO L78 Accepts]: Start accepts. Automaton has 47763 states and 52014 transitions. Word has length 829 [2021-11-07 07:36:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:40,927 INFO L470 AbstractCegarLoop]: Abstraction has 47763 states and 52014 transitions. [2021-11-07 07:36:40,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 47763 states and 52014 transitions. [2021-11-07 07:36:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2021-11-07 07:36:40,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:40,964 INFO L513 BasicCegarLoop]: 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:40,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:36:40,964 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -850061072, now seen corresponding path program 1 times [2021-11-07 07:36:40,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:40,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299381580] [2021-11-07 07:36:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:40,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-07 07:36:41,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:41,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299381580] [2021-11-07 07:36:41,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299381580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:41,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:41,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:36:41,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569687077] [2021-11-07 07:36:41,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:36:41,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:36:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:36:41,813 INFO L87 Difference]: Start difference. First operand 47763 states and 52014 transitions. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:46,488 INFO L93 Difference]: Finished difference Result 110446 states and 120057 transitions. [2021-11-07 07:36:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:36:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 868 [2021-11-07 07:36:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:46,556 INFO L225 Difference]: With dead ends: 110446 [2021-11-07 07:36:46,556 INFO L226 Difference]: Without dead ends: 62260 [2021-11-07 07:36:46,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:36:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62260 states. [2021-11-07 07:36:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62260 to 46905. [2021-11-07 07:36:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46905 states, 46904 states have (on average 1.0849394507931094) internal successors, (50888), 46904 states have internal predecessors, (50888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46905 states to 46905 states and 50888 transitions. [2021-11-07 07:36:47,584 INFO L78 Accepts]: Start accepts. Automaton has 46905 states and 50888 transitions. Word has length 868 [2021-11-07 07:36:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:47,585 INFO L470 AbstractCegarLoop]: Abstraction has 46905 states and 50888 transitions. [2021-11-07 07:36:47,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 46905 states and 50888 transitions. [2021-11-07 07:36:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2021-11-07 07:36:47,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:47,632 INFO L513 BasicCegarLoop]: 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:47,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:36:47,633 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1567356217, now seen corresponding path program 1 times [2021-11-07 07:36:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:47,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745131010] [2021-11-07 07:36:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:47,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-07 07:36:48,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:48,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745131010] [2021-11-07 07:36:48,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745131010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:48,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:48,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:48,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019585503] [2021-11-07 07:36:48,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:48,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:48,174 INFO L87 Difference]: Start difference. First operand 46905 states and 50888 transitions. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:51,160 INFO L93 Difference]: Finished difference Result 99757 states and 108537 transitions. [2021-11-07 07:36:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 888 [2021-11-07 07:36:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:51,248 INFO L225 Difference]: With dead ends: 99757 [2021-11-07 07:36:51,248 INFO L226 Difference]: Without dead ends: 51994 [2021-11-07 07:36:51,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51994 states. [2021-11-07 07:36:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51994 to 46890. [2021-11-07 07:36:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46890 states, 46889 states have (on average 1.0726183113310157) internal successors, (50294), 46889 states have internal predecessors, (50294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46890 states to 46890 states and 50294 transitions. [2021-11-07 07:36:52,121 INFO L78 Accepts]: Start accepts. Automaton has 46890 states and 50294 transitions. Word has length 888 [2021-11-07 07:36:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:52,122 INFO L470 AbstractCegarLoop]: Abstraction has 46890 states and 50294 transitions. [2021-11-07 07:36:52,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 46890 states and 50294 transitions. [2021-11-07 07:36:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2021-11-07 07:36:52,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:52,168 INFO L513 BasicCegarLoop]: 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:36:52,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:36:52,169 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1128886848, now seen corresponding path program 1 times [2021-11-07 07:36:52,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:52,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227671274] [2021-11-07 07:36:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:52,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2021-11-07 07:36:52,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:52,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227671274] [2021-11-07 07:36:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227671274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:52,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:52,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:36:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674259082] [2021-11-07 07:36:52,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:52,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:52,827 INFO L87 Difference]: Start difference. First operand 46890 states and 50294 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:54,823 INFO L93 Difference]: Finished difference Result 91216 states and 97929 transitions. [2021-11-07 07:36:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 981 [2021-11-07 07:36:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:54,868 INFO L225 Difference]: With dead ends: 91216 [2021-11-07 07:36:54,868 INFO L226 Difference]: Without dead ends: 45176 [2021-11-07 07:36:54,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45176 states. [2021-11-07 07:36:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45176 to 45172. [2021-11-07 07:36:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45172 states, 45171 states have (on average 1.072945031104027) internal successors, (48466), 45171 states have internal predecessors, (48466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45172 states to 45172 states and 48466 transitions. [2021-11-07 07:36:55,606 INFO L78 Accepts]: Start accepts. Automaton has 45172 states and 48466 transitions. Word has length 981 [2021-11-07 07:36:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:55,607 INFO L470 AbstractCegarLoop]: Abstraction has 45172 states and 48466 transitions. [2021-11-07 07:36:55,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45172 states and 48466 transitions. [2021-11-07 07:36:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2021-11-07 07:36:55,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:55,639 INFO L513 BasicCegarLoop]: 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:36:55,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:36:55,639 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -280189066, now seen corresponding path program 1 times [2021-11-07 07:36:55,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:55,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747922218] [2021-11-07 07:36:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:55,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 915 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-11-07 07:36:56,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:56,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747922218] [2021-11-07 07:36:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747922218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:56,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:56,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:36:56,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012513975] [2021-11-07 07:36:56,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:36:56,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:36:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:56,176 INFO L87 Difference]: Start difference. First operand 45172 states and 48466 transitions. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:59,128 INFO L93 Difference]: Finished difference Result 92472 states and 99247 transitions. [2021-11-07 07:36:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:36:59,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1004 [2021-11-07 07:36:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:59,208 INFO L225 Difference]: With dead ends: 92472 [2021-11-07 07:36:59,208 INFO L226 Difference]: Without dead ends: 48152 [2021-11-07 07:36:59,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:36:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48152 states. [2021-11-07 07:37:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48152 to 45171. [2021-11-07 07:37:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45171 states, 45170 states have (on average 1.0669028116006198) internal successors, (48192), 45170 states have internal predecessors, (48192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45171 states to 45171 states and 48192 transitions. [2021-11-07 07:37:00,127 INFO L78 Accepts]: Start accepts. Automaton has 45171 states and 48192 transitions. Word has length 1004 [2021-11-07 07:37:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:00,128 INFO L470 AbstractCegarLoop]: Abstraction has 45171 states and 48192 transitions. [2021-11-07 07:37:00,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 45171 states and 48192 transitions. [2021-11-07 07:37:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2021-11-07 07:37:00,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:00,168 INFO L513 BasicCegarLoop]: 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, 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, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:37:00,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:37:00,169 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1707480947, now seen corresponding path program 1 times [2021-11-07 07:37:00,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:00,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602754368] [2021-11-07 07:37:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:00,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 1618 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-07 07:37:00,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:00,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602754368] [2021-11-07 07:37:00,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602754368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:00,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:00,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:37:00,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104765340] [2021-11-07 07:37:00,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:37:00,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:37:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:00,751 INFO L87 Difference]: Start difference. First operand 45171 states and 48192 transitions. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:05,135 INFO L93 Difference]: Finished difference Result 107370 states and 114678 transitions. [2021-11-07 07:37:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:37:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1067 [2021-11-07 07:37:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:05,207 INFO L225 Difference]: With dead ends: 107370 [2021-11-07 07:37:05,207 INFO L226 Difference]: Without dead ends: 63051 [2021-11-07 07:37:05,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63051 states. [2021-11-07 07:37:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63051 to 55815. [2021-11-07 07:37:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55815 states, 55814 states have (on average 1.0663453613788656) internal successors, (59517), 55814 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55815 states to 55815 states and 59517 transitions. [2021-11-07 07:37:06,099 INFO L78 Accepts]: Start accepts. Automaton has 55815 states and 59517 transitions. Word has length 1067 [2021-11-07 07:37:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:06,100 INFO L470 AbstractCegarLoop]: Abstraction has 55815 states and 59517 transitions. [2021-11-07 07:37:06,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 55815 states and 59517 transitions. [2021-11-07 07:37:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2021-11-07 07:37:06,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:06,140 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:37:06,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:37:06,141 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1053545012, now seen corresponding path program 1 times [2021-11-07 07:37:06,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:06,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745049943] [2021-11-07 07:37:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:06,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 1202 proven. 0 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2021-11-07 07:37:07,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:07,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745049943] [2021-11-07 07:37:07,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745049943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:07,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:07,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:07,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704677905] [2021-11-07 07:37:07,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:07,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:07,221 INFO L87 Difference]: Start difference. First operand 55815 states and 59517 transitions. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:10,113 INFO L93 Difference]: Finished difference Result 117998 states and 125753 transitions. [2021-11-07 07:37:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1175 [2021-11-07 07:37:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:10,193 INFO L225 Difference]: With dead ends: 117998 [2021-11-07 07:37:10,193 INFO L226 Difference]: Without dead ends: 62181 [2021-11-07 07:37:10,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62181 states. [2021-11-07 07:37:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62181 to 61749. [2021-11-07 07:37:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61749 states, 61748 states have (on average 1.0592569799831573) internal successors, (65407), 61748 states have internal predecessors, (65407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61749 states to 61749 states and 65407 transitions. [2021-11-07 07:37:11,421 INFO L78 Accepts]: Start accepts. Automaton has 61749 states and 65407 transitions. Word has length 1175 [2021-11-07 07:37:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:11,422 INFO L470 AbstractCegarLoop]: Abstraction has 61749 states and 65407 transitions. [2021-11-07 07:37:11,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 61749 states and 65407 transitions. [2021-11-07 07:37:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2021-11-07 07:37:11,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:11,489 INFO L513 BasicCegarLoop]: 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:11,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 07:37:11,490 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -849860214, now seen corresponding path program 1 times [2021-11-07 07:37:11,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:11,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440688662] [2021-11-07 07:37:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:11,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 1516 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-07 07:37:12,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:12,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440688662] [2021-11-07 07:37:12,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440688662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:12,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:12,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:12,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279465875] [2021-11-07 07:37:12,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:12,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:12,564 INFO L87 Difference]: Start difference. First operand 61749 states and 65407 transitions. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:14,878 INFO L93 Difference]: Finished difference Result 120514 states and 127601 transitions. [2021-11-07 07:37:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1267 [2021-11-07 07:37:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:14,942 INFO L225 Difference]: With dead ends: 120514 [2021-11-07 07:37:14,942 INFO L226 Difference]: Without dead ends: 59617 [2021-11-07 07:37:14,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59617 states. [2021-11-07 07:37:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59617 to 57915. [2021-11-07 07:37:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57915 states, 57914 states have (on average 1.0515592084815415) internal successors, (60900), 57914 states have internal predecessors, (60900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57915 states to 57915 states and 60900 transitions. [2021-11-07 07:37:15,926 INFO L78 Accepts]: Start accepts. Automaton has 57915 states and 60900 transitions. Word has length 1267 [2021-11-07 07:37:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:15,926 INFO L470 AbstractCegarLoop]: Abstraction has 57915 states and 60900 transitions. [2021-11-07 07:37:15,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 57915 states and 60900 transitions. [2021-11-07 07:37:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2021-11-07 07:37:15,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:15,988 INFO L513 BasicCegarLoop]: 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, 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, 5, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:15,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 07:37:15,989 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash -500171333, now seen corresponding path program 1 times [2021-11-07 07:37:15,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:15,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98534066] [2021-11-07 07:37:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:15,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 1883 trivial. 0 not checked. [2021-11-07 07:37:17,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:17,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98534066] [2021-11-07 07:37:17,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98534066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:17,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:17,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:37:17,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091099953] [2021-11-07 07:37:17,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:37:17,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:37:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:17,291 INFO L87 Difference]: Start difference. First operand 57915 states and 60900 transitions. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:21,548 INFO L93 Difference]: Finished difference Result 121807 states and 128122 transitions. [2021-11-07 07:37:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:37:21,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1347 [2021-11-07 07:37:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:21,619 INFO L225 Difference]: With dead ends: 121807 [2021-11-07 07:37:21,620 INFO L226 Difference]: Without dead ends: 64317 [2021-11-07 07:37:21,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64317 states. [2021-11-07 07:37:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64317 to 58338. [2021-11-07 07:37:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58338 states, 58337 states have (on average 1.0506882424533315) internal successors, (61294), 58337 states have internal predecessors, (61294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58338 states to 58338 states and 61294 transitions. [2021-11-07 07:37:22,735 INFO L78 Accepts]: Start accepts. Automaton has 58338 states and 61294 transitions. Word has length 1347 [2021-11-07 07:37:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:22,737 INFO L470 AbstractCegarLoop]: Abstraction has 58338 states and 61294 transitions. [2021-11-07 07:37:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 58338 states and 61294 transitions. [2021-11-07 07:37:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1367 [2021-11-07 07:37:22,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:22,797 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:22,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 07:37:22,797 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 168391135, now seen corresponding path program 1 times [2021-11-07 07:37:22,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:22,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477423587] [2021-11-07 07:37:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:22,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3296 backedges. 2582 proven. 0 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2021-11-07 07:37:23,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:23,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477423587] [2021-11-07 07:37:23,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477423587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:23,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:23,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:23,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699333105] [2021-11-07 07:37:23,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:23,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:23,777 INFO L87 Difference]: Start difference. First operand 58338 states and 61294 transitions. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:30,522 INFO L93 Difference]: Finished difference Result 131154 states and 137920 transitions. [2021-11-07 07:37:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:37:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1366 [2021-11-07 07:37:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:30,609 INFO L225 Difference]: With dead ends: 131154 [2021-11-07 07:37:30,609 INFO L226 Difference]: Without dead ends: 73668 [2021-11-07 07:37:30,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:37:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73668 states. [2021-11-07 07:37:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73668 to 59613. [2021-11-07 07:37:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59613 states, 59612 states have (on average 1.050258337247534) internal successors, (62608), 59612 states have internal predecessors, (62608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59613 states to 59613 states and 62608 transitions. [2021-11-07 07:37:31,880 INFO L78 Accepts]: Start accepts. Automaton has 59613 states and 62608 transitions. Word has length 1366 [2021-11-07 07:37:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:31,882 INFO L470 AbstractCegarLoop]: Abstraction has 59613 states and 62608 transitions. [2021-11-07 07:37:31,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 59613 states and 62608 transitions. [2021-11-07 07:37:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1439 [2021-11-07 07:37:32,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:32,002 INFO L513 BasicCegarLoop]: 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, 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, 5, 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:32,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 07:37:32,002 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -712733974, now seen corresponding path program 1 times [2021-11-07 07:37:32,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:32,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458546439] [2021-11-07 07:37:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:32,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 1282 proven. 0 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2021-11-07 07:37:32,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:32,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458546439] [2021-11-07 07:37:32,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458546439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:32,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:32,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:37:32,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951488299] [2021-11-07 07:37:32,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:37:32,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:37:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:32,997 INFO L87 Difference]: Start difference. First operand 59613 states and 62608 transitions. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:38,083 INFO L93 Difference]: Finished difference Result 147317 states and 154867 transitions. [2021-11-07 07:37:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:37:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1438 [2021-11-07 07:37:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:38,184 INFO L225 Difference]: With dead ends: 147317 [2021-11-07 07:37:38,184 INFO L226 Difference]: Without dead ends: 88131 [2021-11-07 07:37:38,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88131 states. [2021-11-07 07:37:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88131 to 71539. [2021-11-07 07:37:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71539 states, 71538 states have (on average 1.0501411837065615) internal successors, (75125), 71538 states have internal predecessors, (75125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71539 states to 71539 states and 75125 transitions. [2021-11-07 07:37:39,585 INFO L78 Accepts]: Start accepts. Automaton has 71539 states and 75125 transitions. Word has length 1438 [2021-11-07 07:37:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:39,587 INFO L470 AbstractCegarLoop]: Abstraction has 71539 states and 75125 transitions. [2021-11-07 07:37:39,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 71539 states and 75125 transitions. [2021-11-07 07:37:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1452 [2021-11-07 07:37:39,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:39,666 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:39,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 07:37:39,667 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:39,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1064560886, now seen corresponding path program 1 times [2021-11-07 07:37:39,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:39,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964995044] [2021-11-07 07:37:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:39,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3505 backedges. 2793 proven. 0 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2021-11-07 07:37:40,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:40,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964995044] [2021-11-07 07:37:40,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964995044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:40,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:40,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:40,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722795110] [2021-11-07 07:37:40,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:40,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:40,560 INFO L87 Difference]: Start difference. First operand 71539 states and 75125 transitions. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:48,082 INFO L93 Difference]: Finished difference Result 156271 states and 163976 transitions. [2021-11-07 07:37:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:37:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1451 [2021-11-07 07:37:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:48,191 INFO L225 Difference]: With dead ends: 156271 [2021-11-07 07:37:48,191 INFO L226 Difference]: Without dead ends: 85584 [2021-11-07 07:37:48,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:37:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85584 states. [2021-11-07 07:37:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85584 to 67276. [2021-11-07 07:37:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67276 states, 67275 states have (on average 1.0481010776662951) internal successors, (70511), 67275 states have internal predecessors, (70511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67276 states to 67276 states and 70511 transitions. [2021-11-07 07:37:49,842 INFO L78 Accepts]: Start accepts. Automaton has 67276 states and 70511 transitions. Word has length 1451 [2021-11-07 07:37:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 67276 states and 70511 transitions. [2021-11-07 07:37:49,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 67276 states and 70511 transitions. [2021-11-07 07:37:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1476 [2021-11-07 07:37:49,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:49,920 INFO L513 BasicCegarLoop]: 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, 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, 5, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:49,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 07:37:49,921 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2085985060, now seen corresponding path program 1 times [2021-11-07 07:37:49,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:49,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861726918] [2021-11-07 07:37:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:49,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2479 backedges. 1357 proven. 0 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-07 07:37:51,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:51,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861726918] [2021-11-07 07:37:51,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861726918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:51,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:51,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:37:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610838647] [2021-11-07 07:37:51,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:37:51,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:37:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:51,253 INFO L87 Difference]: Start difference. First operand 67276 states and 70511 transitions. Second operand has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:56,256 INFO L93 Difference]: Finished difference Result 149472 states and 156465 transitions. [2021-11-07 07:37:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:37:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1475 [2021-11-07 07:37:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:56,258 INFO L225 Difference]: With dead ends: 149472 [2021-11-07 07:37:56,258 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 07:37:56,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:37:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 07:37:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 07:37:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 07:37:56,287 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1475 [2021-11-07 07:37:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:56,288 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:37:56,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 07:37:56,288 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 07:37:56,291 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:37:56,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 07:37:56,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 07:37:56,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:38:00,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:38:05,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:38:05,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 07:38:15,369 WARN L207 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 687 DAG size of output: 97 [2021-11-07 07:38:22,250 WARN L207 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 734 DAG size of output: 97