./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa --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 8a7679b9688c44fd84543e8b684d34e72b379518d806d27199a245477e871776 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:24:09,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:24:09,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:24:09,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:24:09,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:24:09,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:24:09,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:24:09,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:24:09,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:24:09,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:24:09,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:24:09,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:24:09,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:24:09,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:24:09,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:24:09,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:24:09,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:24:09,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:24:09,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:24:09,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:24:09,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:24:09,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:24:09,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:24:09,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:24:09,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:24:09,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:24:09,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:24:09,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:24:09,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:24:09,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:24:09,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:24:09,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:24:09,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:24:09,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:24:09,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:24:09,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:24:09,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:24:09,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:24:09,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:24:09,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:24:09,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:24:09,117 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:24:09,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:24:09,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:24:09,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:24:09,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:24:09,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:24:09,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:24:09,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:24:09,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:24:09,151 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:24:09,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:24:09,151 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:24:09,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:24:09,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:24:09,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:24:09,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:24:09,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:24:09,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:24:09,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:24:09,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:24:09,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:24:09,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:24:09,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:24:09,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:24:09,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:24:09,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:24:09,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:24:09,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:24:09,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:24:09,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:24:09,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:24:09,166 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:24:09,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:24:09,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:24:09,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:24:09,167 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_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7679b9688c44fd84543e8b684d34e72b379518d806d27199a245477e871776 [2021-12-06 18:24:09,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:24:09,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:24:09,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:24:09,368 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:24:09,369 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:24:09,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c [2021-12-06 18:24:09,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/data/3d5139837/059a98c154e6487eb4afb351a9f7493a/FLAG9d51753bf [2021-12-06 18:24:09,843 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:24:09,844 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c [2021-12-06 18:24:09,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/data/3d5139837/059a98c154e6487eb4afb351a9f7493a/FLAG9d51753bf [2021-12-06 18:24:09,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/data/3d5139837/059a98c154e6487eb4afb351a9f7493a [2021-12-06 18:24:09,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:24:09,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:24:09,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:24:09,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:24:09,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:24:09,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:24:09" (1/1) ... [2021-12-06 18:24:09,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56951f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:09, skipping insertion in model container [2021-12-06 18:24:09,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:24:09" (1/1) ... [2021-12-06 18:24:09,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:24:09,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:24:10,245 WARN L230 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_65403e13-77db-48ae-aeb9-b36e95117970/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c[51682,51695] [2021-12-06 18:24:10,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:24:10,277 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:24:10,331 WARN L230 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_65403e13-77db-48ae-aeb9-b36e95117970/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c[51682,51695] [2021-12-06 18:24:10,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:24:10,365 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:24:10,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10 WrapperNode [2021-12-06 18:24:10,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:24:10,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:24:10,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:24:10,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:24:10,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,444 INFO L137 Inliner]: procedures = 126, calls = 201, calls flagged for inlining = 57, calls inlined = 52, statements flattened = 994 [2021-12-06 18:24:10,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:24:10,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:24:10,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:24:10,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:24:10,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:24:10,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:24:10,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:24:10,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:24:10,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (1/1) ... [2021-12-06 18:24:10,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:24:10,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:10,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:24:10,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:24:10,570 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-12-06 18:24:10,570 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-12-06 18:24:10,571 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-06 18:24:10,571 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-06 18:24:10,571 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-06 18:24:10,571 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-12-06 18:24:10,571 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-06 18:24:10,571 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-06 18:24:10,571 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-06 18:24:10,572 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-06 18:24:10,572 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-12-06 18:24:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-12-06 18:24:10,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:24:10,573 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-06 18:24:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-06 18:24:10,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:24:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:24:10,702 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:24:10,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:24:11,136 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:24:11,147 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:24:11,147 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 18:24:11,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:24:11 BoogieIcfgContainer [2021-12-06 18:24:11,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:24:11,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:24:11,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:24:11,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:24:11,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:24:09" (1/3) ... [2021-12-06 18:24:11,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11863971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:24:11, skipping insertion in model container [2021-12-06 18:24:11,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:24:10" (2/3) ... [2021-12-06 18:24:11,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11863971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:24:11, skipping insertion in model container [2021-12-06 18:24:11,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:24:11" (3/3) ... [2021-12-06 18:24:11,158 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product16.cil.c [2021-12-06 18:24:11,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:24:11,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:24:11,206 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:24:11,212 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 [2021-12-06 18:24:11,212 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:24:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 236 states have (on average 1.5338983050847457) internal successors, (362), 240 states have internal predecessors, (362), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-06 18:24:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 18:24:11,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:11,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:11,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash -806898450, now seen corresponding path program 1 times [2021-12-06 18:24:11,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:11,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062177201] [2021-12-06 18:24:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:11,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:24:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:24:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:24:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:24:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:24:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:24:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:24:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:24:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 18:24:11,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062177201] [2021-12-06 18:24:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062177201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641428964] [2021-12-06 18:24:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:11,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:11,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:11,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:11,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:24:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:24:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:24:11,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:24:11,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641428964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:11,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:24:11,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2021-12-06 18:24:11,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17024150] [2021-12-06 18:24:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:11,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:24:11,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:24:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:24:11,995 INFO L87 Difference]: Start difference. First operand has 299 states, 236 states have (on average 1.5338983050847457) internal successors, (362), 240 states have internal predecessors, (362), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:12,036 INFO L93 Difference]: Finished difference Result 444 states and 658 transitions. [2021-12-06 18:24:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:24:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 89 [2021-12-06 18:24:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:12,049 INFO L225 Difference]: With dead ends: 444 [2021-12-06 18:24:12,049 INFO L226 Difference]: Without dead ends: 292 [2021-12-06 18:24:12,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:24:12,056 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:12,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:24:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-06 18:24:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-12-06 18:24:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 230 states have (on average 1.5260869565217392) internal successors, (351), 233 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-06 18:24:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 440 transitions. [2021-12-06 18:24:12,119 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 440 transitions. Word has length 89 [2021-12-06 18:24:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 440 transitions. [2021-12-06 18:24:12,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 440 transitions. [2021-12-06 18:24:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 18:24:12,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:12,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:12,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:24:12,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 18:24:12,330 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1177822227, now seen corresponding path program 1 times [2021-12-06 18:24:12,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:12,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853752324] [2021-12-06 18:24:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:12,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:24:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:24:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:24:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:24:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 18:24:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:24:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:24:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:24:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 18:24:12,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:12,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853752324] [2021-12-06 18:24:12,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853752324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128176478] [2021-12-06 18:24:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:12,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:12,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:12,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:24:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:24:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:24:12,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:24:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128176478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:12,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:24:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-06 18:24:12,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384870369] [2021-12-06 18:24:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:12,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:24:12,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:24:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:24:12,825 INFO L87 Difference]: Start difference. First operand 292 states and 440 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:12,858 INFO L93 Difference]: Finished difference Result 434 states and 639 transitions. [2021-12-06 18:24:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:24:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2021-12-06 18:24:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:12,863 INFO L225 Difference]: With dead ends: 434 [2021-12-06 18:24:12,863 INFO L226 Difference]: Without dead ends: 295 [2021-12-06 18:24:12,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:24:12,866 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 1 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:12,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 874 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:24:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-06 18:24:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-12-06 18:24:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 232 states have (on average 1.521551724137931) internal successors, (353), 235 states have internal predecessors, (353), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-06 18:24:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 442 transitions. [2021-12-06 18:24:12,896 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 442 transitions. Word has length 90 [2021-12-06 18:24:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:12,896 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 442 transitions. [2021-12-06 18:24:12,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 442 transitions. [2021-12-06 18:24:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:24:12,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:12,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:12,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:24:13,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 18:24:13,101 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 213599068, now seen corresponding path program 1 times [2021-12-06 18:24:13,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829110776] [2021-12-06 18:24:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:13,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:24:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:24:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:24:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:24:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:24:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:24:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:24:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:24:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:24:13,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:13,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829110776] [2021-12-06 18:24:13,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829110776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:13,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870917514] [2021-12-06 18:24:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:13,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:13,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:13,238 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:13,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:24:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:24:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:24:13,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:24:13,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870917514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:13,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:24:13,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-06 18:24:13,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558656669] [2021-12-06 18:24:13,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:13,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:24:13,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:24:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:24:13,475 INFO L87 Difference]: Start difference. First operand 294 states and 442 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:13,503 INFO L93 Difference]: Finished difference Result 618 states and 943 transitions. [2021-12-06 18:24:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:24:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 96 [2021-12-06 18:24:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:13,507 INFO L225 Difference]: With dead ends: 618 [2021-12-06 18:24:13,507 INFO L226 Difference]: Without dead ends: 351 [2021-12-06 18:24:13,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:24:13,510 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 107 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:13,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 858 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:24:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-06 18:24:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 343. [2021-12-06 18:24:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 270 states have (on average 1.537037037037037) internal successors, (415), 273 states have internal predecessors, (415), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-12-06 18:24:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 526 transitions. [2021-12-06 18:24:13,533 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 526 transitions. Word has length 96 [2021-12-06 18:24:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:13,534 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 526 transitions. [2021-12-06 18:24:13,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 526 transitions. [2021-12-06 18:24:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:24:13,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:13,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:13,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:24:13,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:13,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1191934709, now seen corresponding path program 1 times [2021-12-06 18:24:13,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524293689] [2021-12-06 18:24:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:13,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:24:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:24:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:24:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 18:24:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:24:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:24:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:24:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:24:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:24:13,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524293689] [2021-12-06 18:24:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524293689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007675600] [2021-12-06 18:24:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:13,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:13,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:13,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:13,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:24:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:24:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:24:14,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:24:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007675600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:14,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:24:14,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-06 18:24:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284579917] [2021-12-06 18:24:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:14,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:24:14,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:24:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:24:14,221 INFO L87 Difference]: Start difference. First operand 343 states and 526 transitions. Second operand has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:14,272 INFO L93 Difference]: Finished difference Result 677 states and 1042 transitions. [2021-12-06 18:24:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:24:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 97 [2021-12-06 18:24:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:14,276 INFO L225 Difference]: With dead ends: 677 [2021-12-06 18:24:14,276 INFO L226 Difference]: Without dead ends: 345 [2021-12-06 18:24:14,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:14,279 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 125 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:14,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1580 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:24:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-06 18:24:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-12-06 18:24:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 271 states have (on average 1.5350553505535056) internal successors, (416), 275 states have internal predecessors, (416), 56 states have call successors, (56), 16 states have call predecessors, (56), 17 states have return successors, (57), 55 states have call predecessors, (57), 55 states have call successors, (57) [2021-12-06 18:24:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 529 transitions. [2021-12-06 18:24:14,301 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 529 transitions. Word has length 97 [2021-12-06 18:24:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:14,301 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 529 transitions. [2021-12-06 18:24:14,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 529 transitions. [2021-12-06 18:24:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 18:24:14,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:14,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:14,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:24:14,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:14,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash -398998019, now seen corresponding path program 1 times [2021-12-06 18:24:14,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870547776] [2021-12-06 18:24:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:14,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 18:24:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:24:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:24:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:24:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:24:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:24:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:24:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:24:14,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870547776] [2021-12-06 18:24:14,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870547776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132362240] [2021-12-06 18:24:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:14,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:14,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:14,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:24:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:24:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:24:14,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:24:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132362240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:14,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:24:14,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-12-06 18:24:14,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522967964] [2021-12-06 18:24:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:14,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:24:14,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:24:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:24:14,971 INFO L87 Difference]: Start difference. First operand 345 states and 529 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:15,017 INFO L93 Difference]: Finished difference Result 679 states and 1047 transitions. [2021-12-06 18:24:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:24:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 98 [2021-12-06 18:24:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:15,020 INFO L225 Difference]: With dead ends: 679 [2021-12-06 18:24:15,020 INFO L226 Difference]: Without dead ends: 347 [2021-12-06 18:24:15,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:24:15,022 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 124 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:15,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1569 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:24:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-06 18:24:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2021-12-06 18:24:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 272 states have (on average 1.5330882352941178) internal successors, (417), 277 states have internal predecessors, (417), 56 states have call successors, (56), 16 states have call predecessors, (56), 18 states have return successors, (62), 55 states have call predecessors, (62), 55 states have call successors, (62) [2021-12-06 18:24:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 535 transitions. [2021-12-06 18:24:15,037 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 535 transitions. Word has length 98 [2021-12-06 18:24:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:15,037 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 535 transitions. [2021-12-06 18:24:15,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 535 transitions. [2021-12-06 18:24:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 18:24:15,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:15,039 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:15,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:24:15,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:15,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash 262721501, now seen corresponding path program 1 times [2021-12-06 18:24:15,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873654061] [2021-12-06 18:24:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:15,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:24:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:24:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:24:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:24:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:24:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:24:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:24:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873654061] [2021-12-06 18:24:15,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873654061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:15,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:15,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:24:15,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237566526] [2021-12-06 18:24:15,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:15,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:24:15,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:24:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:24:15,340 INFO L87 Difference]: Start difference. First operand 347 states and 535 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:16,422 INFO L93 Difference]: Finished difference Result 819 states and 1261 transitions. [2021-12-06 18:24:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:24:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 99 [2021-12-06 18:24:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:16,427 INFO L225 Difference]: With dead ends: 819 [2021-12-06 18:24:16,427 INFO L226 Difference]: Without dead ends: 495 [2021-12-06 18:24:16,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:24:16,430 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 1023 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:16,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 1581 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:24:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-06 18:24:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 347. [2021-12-06 18:24:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 272 states have (on average 1.5330882352941178) internal successors, (417), 277 states have internal predecessors, (417), 56 states have call successors, (56), 16 states have call predecessors, (56), 18 states have return successors, (61), 55 states have call predecessors, (61), 55 states have call successors, (61) [2021-12-06 18:24:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 534 transitions. [2021-12-06 18:24:16,467 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 534 transitions. Word has length 99 [2021-12-06 18:24:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:16,467 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 534 transitions. [2021-12-06 18:24:16,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 534 transitions. [2021-12-06 18:24:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 18:24:16,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:16,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:16,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:24:16,470 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash 963094467, now seen corresponding path program 2 times [2021-12-06 18:24:16,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:16,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841481437] [2021-12-06 18:24:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:16,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:24:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:24:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:24:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:24:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:24:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:24:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:24:16,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841481437] [2021-12-06 18:24:16,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841481437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:16,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:16,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:24:16,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42578986] [2021-12-06 18:24:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:16,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:24:16,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:24:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:24:16,579 INFO L87 Difference]: Start difference. First operand 347 states and 534 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:17,643 INFO L93 Difference]: Finished difference Result 821 states and 1264 transitions. [2021-12-06 18:24:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:24:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2021-12-06 18:24:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:17,646 INFO L225 Difference]: With dead ends: 821 [2021-12-06 18:24:17,646 INFO L226 Difference]: Without dead ends: 497 [2021-12-06 18:24:17,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:24:17,648 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1018 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:17,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1582 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:24:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-06 18:24:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 349. [2021-12-06 18:24:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 273 states have (on average 1.531135531135531) internal successors, (418), 279 states have internal predecessors, (418), 56 states have call successors, (56), 16 states have call predecessors, (56), 19 states have return successors, (63), 55 states have call predecessors, (63), 55 states have call successors, (63) [2021-12-06 18:24:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 537 transitions. [2021-12-06 18:24:17,670 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 537 transitions. Word has length 100 [2021-12-06 18:24:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:17,670 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 537 transitions. [2021-12-06 18:24:17,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:24:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 537 transitions. [2021-12-06 18:24:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 18:24:17,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:17,672 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:17,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:24:17,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -868146014, now seen corresponding path program 1 times [2021-12-06 18:24:17,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871371828] [2021-12-06 18:24:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:17,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:24:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:24:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:24:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:24:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:24:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:24:17,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871371828] [2021-12-06 18:24:17,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871371828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:17,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:17,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 18:24:17,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170685421] [2021-12-06 18:24:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:17,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:24:17,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:24:17,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:24:17,782 INFO L87 Difference]: Start difference. First operand 349 states and 537 transitions. Second operand has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:24:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:19,007 INFO L93 Difference]: Finished difference Result 819 states and 1259 transitions. [2021-12-06 18:24:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:24:19,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2021-12-06 18:24:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:19,011 INFO L225 Difference]: With dead ends: 819 [2021-12-06 18:24:19,011 INFO L226 Difference]: Without dead ends: 497 [2021-12-06 18:24:19,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:24:19,013 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 1130 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:19,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 2038 Invalid, 3444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 18:24:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-06 18:24:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 349. [2021-12-06 18:24:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 273 states have (on average 1.531135531135531) internal successors, (418), 279 states have internal predecessors, (418), 56 states have call successors, (56), 16 states have call predecessors, (56), 19 states have return successors, (62), 55 states have call predecessors, (62), 55 states have call successors, (62) [2021-12-06 18:24:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 536 transitions. [2021-12-06 18:24:19,033 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 536 transitions. Word has length 101 [2021-12-06 18:24:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 536 transitions. [2021-12-06 18:24:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:24:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 536 transitions. [2021-12-06 18:24:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 18:24:19,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:19,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:19,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:24:19,035 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 400437826, now seen corresponding path program 2 times [2021-12-06 18:24:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216998491] [2021-12-06 18:24:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:19,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:24:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:24:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:24:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 18:24:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:24:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:24:19,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216998491] [2021-12-06 18:24:19,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216998491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:19,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:19,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 18:24:19,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703511351] [2021-12-06 18:24:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:19,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:24:19,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:24:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:24:19,132 INFO L87 Difference]: Start difference. First operand 349 states and 536 transitions. Second operand has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:24:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:20,325 INFO L93 Difference]: Finished difference Result 821 states and 1265 transitions. [2021-12-06 18:24:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:24:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 102 [2021-12-06 18:24:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:20,328 INFO L225 Difference]: With dead ends: 821 [2021-12-06 18:24:20,329 INFO L226 Difference]: Without dead ends: 499 [2021-12-06 18:24:20,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:24:20,330 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 1125 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 3471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:20,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 2039 Invalid, 3471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 3064 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 18:24:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-06 18:24:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 351. [2021-12-06 18:24:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 274 states have (on average 1.5291970802919708) internal successors, (419), 281 states have internal predecessors, (419), 56 states have call successors, (56), 16 states have call predecessors, (56), 20 states have return successors, (67), 55 states have call predecessors, (67), 55 states have call successors, (67) [2021-12-06 18:24:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 542 transitions. [2021-12-06 18:24:20,351 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 542 transitions. Word has length 102 [2021-12-06 18:24:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:20,351 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 542 transitions. [2021-12-06 18:24:20,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:24:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 542 transitions. [2021-12-06 18:24:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 18:24:20,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:20,353 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:20,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:24:20,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1821386649, now seen corresponding path program 1 times [2021-12-06 18:24:20,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:20,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110747778] [2021-12-06 18:24:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:20,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:24:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:24:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:24:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:24:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:24:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:20,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110747778] [2021-12-06 18:24:20,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110747778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075650087] [2021-12-06 18:24:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:20,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:20,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:20,439 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:20,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:24:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:24:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:20,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:24:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:20,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075650087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:24:20,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:24:20,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2021-12-06 18:24:20,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685674869] [2021-12-06 18:24:20,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:24:20,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:24:20,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:24:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:24:20,740 INFO L87 Difference]: Start difference. First operand 351 states and 542 transitions. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 7 states have internal predecessors, (96), 2 states have call successors, (27), 6 states have call predecessors, (27), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 18:24:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:21,617 INFO L93 Difference]: Finished difference Result 990 states and 1593 transitions. [2021-12-06 18:24:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:24:21,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 7 states have internal predecessors, (96), 2 states have call successors, (27), 6 states have call predecessors, (27), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 103 [2021-12-06 18:24:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:21,623 INFO L225 Difference]: With dead ends: 990 [2021-12-06 18:24:21,623 INFO L226 Difference]: Without dead ends: 851 [2021-12-06 18:24:21,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:24:21,625 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1529 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:21,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 1761 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:24:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-12-06 18:24:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 679. [2021-12-06 18:24:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 538 states have (on average 1.5929368029739777) internal successors, (857), 545 states have internal predecessors, (857), 120 states have call successors, (120), 16 states have call predecessors, (120), 20 states have return successors, (141), 119 states have call predecessors, (141), 119 states have call successors, (141) [2021-12-06 18:24:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1118 transitions. [2021-12-06 18:24:21,660 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1118 transitions. Word has length 103 [2021-12-06 18:24:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:21,660 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1118 transitions. [2021-12-06 18:24:21,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 7 states have internal predecessors, (96), 2 states have call successors, (27), 6 states have call predecessors, (27), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 18:24:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1118 transitions. [2021-12-06 18:24:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 18:24:21,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:21,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:21,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:24:21,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:24:21,865 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:21,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1014946556, now seen corresponding path program 1 times [2021-12-06 18:24:21,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:21,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619393110] [2021-12-06 18:24:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:21,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:24:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:24:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:24:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:24:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:24:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:21,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:21,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619393110] [2021-12-06 18:24:21,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619393110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:21,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:21,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:21,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397753938] [2021-12-06 18:24:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:21,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:21,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:21,973 INFO L87 Difference]: Start difference. First operand 679 states and 1118 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:22,740 INFO L93 Difference]: Finished difference Result 1771 states and 2964 transitions. [2021-12-06 18:24:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-12-06 18:24:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:22,747 INFO L225 Difference]: With dead ends: 1771 [2021-12-06 18:24:22,747 INFO L226 Difference]: Without dead ends: 1160 [2021-12-06 18:24:22,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:22,750 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1014 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:22,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 1340 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-12-06 18:24:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1004. [2021-12-06 18:24:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 799 states have (on average 1.6045056320400501) internal successors, (1282), 806 states have internal predecessors, (1282), 184 states have call successors, (184), 16 states have call predecessors, (184), 20 states have return successors, (215), 183 states have call predecessors, (215), 183 states have call successors, (215) [2021-12-06 18:24:22,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1681 transitions. [2021-12-06 18:24:22,806 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1681 transitions. Word has length 109 [2021-12-06 18:24:22,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:22,806 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1681 transitions. [2021-12-06 18:24:22,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1681 transitions. [2021-12-06 18:24:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 18:24:22,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:22,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:22,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:24:22,811 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2033055594, now seen corresponding path program 1 times [2021-12-06 18:24:22,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892467546] [2021-12-06 18:24:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:22,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:24:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:24:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:24:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:24:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:24:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:22,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:22,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892467546] [2021-12-06 18:24:22,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892467546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:22,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:22,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:22,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153709261] [2021-12-06 18:24:22,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:22,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:22,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:22,882 INFO L87 Difference]: Start difference. First operand 1004 states and 1681 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:23,607 INFO L93 Difference]: Finished difference Result 2551 states and 4313 transitions. [2021-12-06 18:24:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-12-06 18:24:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:23,616 INFO L225 Difference]: With dead ends: 2551 [2021-12-06 18:24:23,616 INFO L226 Difference]: Without dead ends: 1668 [2021-12-06 18:24:23,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:23,620 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1012 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:23,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 1348 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-12-06 18:24:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1512. [2021-12-06 18:24:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1212 states have (on average 1.6113861386138615) internal successors, (1953), 1219 states have internal predecessors, (1953), 279 states have call successors, (279), 16 states have call predecessors, (279), 20 states have return successors, (310), 278 states have call predecessors, (310), 278 states have call successors, (310) [2021-12-06 18:24:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2542 transitions. [2021-12-06 18:24:23,701 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2542 transitions. Word has length 110 [2021-12-06 18:24:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:23,702 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2542 transitions. [2021-12-06 18:24:23,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2542 transitions. [2021-12-06 18:24:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:24:23,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:23,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:23,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:24:23,708 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1439293862, now seen corresponding path program 1 times [2021-12-06 18:24:23,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:23,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618825129] [2021-12-06 18:24:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:23,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:24:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:24:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:24:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:24:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:24:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:23,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618825129] [2021-12-06 18:24:23,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618825129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:23,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:23,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:23,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752270768] [2021-12-06 18:24:23,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:23,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:23,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:23,777 INFO L87 Difference]: Start difference. First operand 1512 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:24,560 INFO L93 Difference]: Finished difference Result 3703 states and 6322 transitions. [2021-12-06 18:24:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-12-06 18:24:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:24,573 INFO L225 Difference]: With dead ends: 3703 [2021-12-06 18:24:24,573 INFO L226 Difference]: Without dead ends: 2437 [2021-12-06 18:24:24,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:24,577 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 1010 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:24,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1309 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-12-06 18:24:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2281. [2021-12-06 18:24:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 1858 states have (on average 1.6167922497308935) internal successors, (3004), 1865 states have internal predecessors, (3004), 402 states have call successors, (402), 16 states have call predecessors, (402), 20 states have return successors, (449), 401 states have call predecessors, (449), 401 states have call successors, (449) [2021-12-06 18:24:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3855 transitions. [2021-12-06 18:24:24,698 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3855 transitions. Word has length 111 [2021-12-06 18:24:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:24,698 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3855 transitions. [2021-12-06 18:24:24,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3855 transitions. [2021-12-06 18:24:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:24:24,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:24,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:24,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:24:24,709 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -497333621, now seen corresponding path program 1 times [2021-12-06 18:24:24,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241874840] [2021-12-06 18:24:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:24,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:24:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:24:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:24:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:24:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:24:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:24,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241874840] [2021-12-06 18:24:24,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241874840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:24,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:24,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:24,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19543988] [2021-12-06 18:24:24,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:24,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:24,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:24,793 INFO L87 Difference]: Start difference. First operand 2281 states and 3855 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:25,606 INFO L93 Difference]: Finished difference Result 5497 states and 9456 transitions. [2021-12-06 18:24:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-12-06 18:24:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:25,625 INFO L225 Difference]: With dead ends: 5497 [2021-12-06 18:24:25,625 INFO L226 Difference]: Without dead ends: 3666 [2021-12-06 18:24:25,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:25,630 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 1008 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:25,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 1315 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-12-06 18:24:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3510. [2021-12-06 18:24:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 2908 states have (on average 1.6200137551581844) internal successors, (4711), 2915 states have internal predecessors, (4711), 581 states have call successors, (581), 16 states have call predecessors, (581), 20 states have return successors, (654), 580 states have call predecessors, (654), 580 states have call successors, (654) [2021-12-06 18:24:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 5946 transitions. [2021-12-06 18:24:25,794 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 5946 transitions. Word has length 112 [2021-12-06 18:24:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:25,794 INFO L470 AbstractCegarLoop]: Abstraction has 3510 states and 5946 transitions. [2021-12-06 18:24:25,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 5946 transitions. [2021-12-06 18:24:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 18:24:25,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:25,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:25,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:24:25,802 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:25,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1467419038, now seen corresponding path program 1 times [2021-12-06 18:24:25,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:25,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014366732] [2021-12-06 18:24:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:25,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:24:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:24:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:24:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:24:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:24:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:25,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014366732] [2021-12-06 18:24:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014366732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:25,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:25,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:25,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170049849] [2021-12-06 18:24:25,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:25,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:25,871 INFO L87 Difference]: Start difference. First operand 3510 states and 5946 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:26,766 INFO L93 Difference]: Finished difference Result 8445 states and 14603 transitions. [2021-12-06 18:24:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-12-06 18:24:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:26,797 INFO L225 Difference]: With dead ends: 8445 [2021-12-06 18:24:26,797 INFO L226 Difference]: Without dead ends: 5697 [2021-12-06 18:24:26,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:26,804 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 1006 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:26,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 1320 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-12-06 18:24:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5541. [2021-12-06 18:24:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 4563 states have (on average 1.613631382862152) internal successors, (7363), 4570 states have internal predecessors, (7363), 957 states have call successors, (957), 16 states have call predecessors, (957), 20 states have return successors, (1074), 956 states have call predecessors, (1074), 956 states have call successors, (1074) [2021-12-06 18:24:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 9394 transitions. [2021-12-06 18:24:27,059 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 9394 transitions. Word has length 113 [2021-12-06 18:24:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:27,059 INFO L470 AbstractCegarLoop]: Abstraction has 5541 states and 9394 transitions. [2021-12-06 18:24:27,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 9394 transitions. [2021-12-06 18:24:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 18:24:27,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:27,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:27,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:24:27,068 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -678340145, now seen corresponding path program 1 times [2021-12-06 18:24:27,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:27,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785070544] [2021-12-06 18:24:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:27,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:24:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:24:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:24:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:24:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:24:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:27,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785070544] [2021-12-06 18:24:27,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785070544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:27,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:27,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:27,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162021587] [2021-12-06 18:24:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:27,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:27,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:27,139 INFO L87 Difference]: Start difference. First operand 5541 states and 9394 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:28,174 INFO L93 Difference]: Finished difference Result 13782 states and 23824 transitions. [2021-12-06 18:24:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:28,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-06 18:24:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:28,222 INFO L225 Difference]: With dead ends: 13782 [2021-12-06 18:24:28,222 INFO L226 Difference]: Without dead ends: 9380 [2021-12-06 18:24:28,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:28,233 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 1004 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:28,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 1314 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9380 states. [2021-12-06 18:24:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9380 to 9224. [2021-12-06 18:24:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9224 states, 7640 states have (on average 1.6111256544502617) internal successors, (12309), 7647 states have internal predecessors, (12309), 1563 states have call successors, (1563), 16 states have call predecessors, (1563), 20 states have return successors, (1758), 1562 states have call predecessors, (1758), 1562 states have call successors, (1758) [2021-12-06 18:24:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9224 states to 9224 states and 15630 transitions. [2021-12-06 18:24:28,613 INFO L78 Accepts]: Start accepts. Automaton has 9224 states and 15630 transitions. Word has length 114 [2021-12-06 18:24:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:28,613 INFO L470 AbstractCegarLoop]: Abstraction has 9224 states and 15630 transitions. [2021-12-06 18:24:28,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9224 states and 15630 transitions. [2021-12-06 18:24:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 18:24:28,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:28,624 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:28,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:24:28,625 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1860754352, now seen corresponding path program 1 times [2021-12-06 18:24:28,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142661356] [2021-12-06 18:24:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:28,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:24:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:24:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 18:24:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:24:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:24:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:28,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142661356] [2021-12-06 18:24:28,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142661356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:28,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:28,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:28,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791348779] [2021-12-06 18:24:28,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:28,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:28,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:28,718 INFO L87 Difference]: Start difference. First operand 9224 states and 15630 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:29,894 INFO L93 Difference]: Finished difference Result 23966 states and 41370 transitions. [2021-12-06 18:24:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 115 [2021-12-06 18:24:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:29,938 INFO L225 Difference]: With dead ends: 23966 [2021-12-06 18:24:29,938 INFO L226 Difference]: Without dead ends: 16333 [2021-12-06 18:24:29,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:29,957 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 1002 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:29,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 1365 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:24:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16333 states. [2021-12-06 18:24:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16333 to 16177. [2021-12-06 18:24:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16177 states, 13390 states have (on average 1.6020164301717699) internal successors, (21451), 13397 states have internal predecessors, (21451), 2766 states have call successors, (2766), 16 states have call predecessors, (2766), 20 states have return successors, (3105), 2765 states have call predecessors, (3105), 2765 states have call successors, (3105) [2021-12-06 18:24:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16177 states to 16177 states and 27322 transitions. [2021-12-06 18:24:30,673 INFO L78 Accepts]: Start accepts. Automaton has 16177 states and 27322 transitions. Word has length 115 [2021-12-06 18:24:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:30,674 INFO L470 AbstractCegarLoop]: Abstraction has 16177 states and 27322 transitions. [2021-12-06 18:24:30,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 16177 states and 27322 transitions. [2021-12-06 18:24:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:24:30,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:30,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:30,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:24:30,688 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1941197296, now seen corresponding path program 1 times [2021-12-06 18:24:30,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:30,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249394723] [2021-12-06 18:24:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:24:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:24:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:24:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:24:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:24:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:30,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249394723] [2021-12-06 18:24:30,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249394723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:30,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:30,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:30,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24762063] [2021-12-06 18:24:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:30,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:30,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:30,762 INFO L87 Difference]: Start difference. First operand 16177 states and 27322 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:32,512 INFO L93 Difference]: Finished difference Result 42932 states and 73969 transitions. [2021-12-06 18:24:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:32,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 116 [2021-12-06 18:24:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:32,587 INFO L225 Difference]: With dead ends: 42932 [2021-12-06 18:24:32,587 INFO L226 Difference]: Without dead ends: 28988 [2021-12-06 18:24:32,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:32,611 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 1000 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:32,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 1320 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:24:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28988 states. [2021-12-06 18:24:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28988 to 28832. [2021-12-06 18:24:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28832 states, 24006 states have (on average 1.597725568607848) internal successors, (38355), 24013 states have internal predecessors, (38355), 4805 states have call successors, (4805), 16 states have call predecessors, (4805), 20 states have return successors, (5418), 4804 states have call predecessors, (5418), 4804 states have call successors, (5418) [2021-12-06 18:24:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28832 states to 28832 states and 48578 transitions. [2021-12-06 18:24:33,790 INFO L78 Accepts]: Start accepts. Automaton has 28832 states and 48578 transitions. Word has length 116 [2021-12-06 18:24:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:33,790 INFO L470 AbstractCegarLoop]: Abstraction has 28832 states and 48578 transitions. [2021-12-06 18:24:33,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 28832 states and 48578 transitions. [2021-12-06 18:24:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:24:33,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:33,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:33,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:24:33,807 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash -732373582, now seen corresponding path program 1 times [2021-12-06 18:24:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:33,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443324247] [2021-12-06 18:24:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:33,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:24:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:24:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:24:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:24:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:24:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:33,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443324247] [2021-12-06 18:24:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443324247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:33,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:33,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:33,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516330998] [2021-12-06 18:24:33,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:33,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:33,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:33,877 INFO L87 Difference]: Start difference. First operand 28832 states and 48578 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:36,395 INFO L93 Difference]: Finished difference Result 78694 states and 134728 transitions. [2021-12-06 18:24:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 117 [2021-12-06 18:24:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:36,541 INFO L225 Difference]: With dead ends: 78694 [2021-12-06 18:24:36,541 INFO L226 Difference]: Without dead ends: 52867 [2021-12-06 18:24:36,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:36,595 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 998 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:36,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1013 Valid, 1314 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:24:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52867 states. [2021-12-06 18:24:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52867 to 52711. [2021-12-06 18:24:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52711 states, 44170 states have (on average 1.5921213493321258) internal successors, (70324), 44177 states have internal predecessors, (70324), 8520 states have call successors, (8520), 16 states have call predecessors, (8520), 20 states have return successors, (9665), 8519 states have call predecessors, (9665), 8519 states have call successors, (9665) [2021-12-06 18:24:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52711 states to 52711 states and 88509 transitions. [2021-12-06 18:24:38,968 INFO L78 Accepts]: Start accepts. Automaton has 52711 states and 88509 transitions. Word has length 117 [2021-12-06 18:24:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:38,968 INFO L470 AbstractCegarLoop]: Abstraction has 52711 states and 88509 transitions. [2021-12-06 18:24:38,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 52711 states and 88509 transitions. [2021-12-06 18:24:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:24:38,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:38,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:38,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:24:38,989 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:38,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1116888912, now seen corresponding path program 1 times [2021-12-06 18:24:38,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:38,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434337047] [2021-12-06 18:24:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:38,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:24:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:24:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:24:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:24:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:24:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:39,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:39,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434337047] [2021-12-06 18:24:39,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434337047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:39,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:39,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:24:39,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010676452] [2021-12-06 18:24:39,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:39,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:24:39,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:24:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:24:39,072 INFO L87 Difference]: Start difference. First operand 52711 states and 88509 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:42,903 INFO L93 Difference]: Finished difference Result 98465 states and 168915 transitions. [2021-12-06 18:24:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:24:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 118 [2021-12-06 18:24:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:43,186 INFO L225 Difference]: With dead ends: 98465 [2021-12-06 18:24:43,186 INFO L226 Difference]: Without dead ends: 98326 [2021-12-06 18:24:43,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:24:43,220 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 996 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:43,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1320 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:24:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98326 states. [2021-12-06 18:24:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98326 to 98170. [2021-12-06 18:24:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98170 states, 82830 states have (on average 1.5851020161777134) internal successors, (131294), 82837 states have internal predecessors, (131294), 15319 states have call successors, (15319), 16 states have call predecessors, (15319), 20 states have return successors, (17510), 15318 states have call predecessors, (17510), 15318 states have call successors, (17510) [2021-12-06 18:24:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98170 states to 98170 states and 164123 transitions. [2021-12-06 18:24:47,758 INFO L78 Accepts]: Start accepts. Automaton has 98170 states and 164123 transitions. Word has length 118 [2021-12-06 18:24:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:47,758 INFO L470 AbstractCegarLoop]: Abstraction has 98170 states and 164123 transitions. [2021-12-06 18:24:47,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:24:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 98170 states and 164123 transitions. [2021-12-06 18:24:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 18:24:47,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:47,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:47,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:24:47,778 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2090243313, now seen corresponding path program 1 times [2021-12-06 18:24:47,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:47,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833648751] [2021-12-06 18:24:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:47,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:24:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:24:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:24:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:24:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:24:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:24:47,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833648751] [2021-12-06 18:24:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833648751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:47,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:47,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 18:24:47,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71157163] [2021-12-06 18:24:47,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:47,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:24:47,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:24:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:24:47,906 INFO L87 Difference]: Start difference. First operand 98170 states and 164123 transitions. Second operand has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 10 states have internal predecessors, (82), 5 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-06 18:24:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:58,184 INFO L93 Difference]: Finished difference Result 196666 states and 340630 transitions. [2021-12-06 18:24:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:24:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 10 states have internal predecessors, (82), 5 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 119 [2021-12-06 18:24:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:58,908 INFO L225 Difference]: With dead ends: 196666 [2021-12-06 18:24:58,908 INFO L226 Difference]: Without dead ends: 196533 [2021-12-06 18:24:58,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=822, Invalid=3600, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:24:58,973 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 5082 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 8223 mSolverCounterSat, 2513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5082 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 10736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2513 IncrementalHoareTripleChecker+Valid, 8223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:58,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5082 Valid, 3417 Invalid, 10736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2513 Valid, 8223 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 18:24:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196533 states. [2021-12-06 18:25:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196533 to 195512. [2021-12-06 18:25:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195512 states, 165032 states have (on average 1.5858984924135926) internal successors, (261724), 164935 states have internal predecessors, (261724), 30430 states have call successors, (30430), 41 states have call predecessors, (30430), 49 states have return successors, (38087), 30541 states have call predecessors, (38087), 30427 states have call successors, (38087) [2021-12-06 18:25:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195512 states to 195512 states and 330241 transitions. [2021-12-06 18:25:08,338 INFO L78 Accepts]: Start accepts. Automaton has 195512 states and 330241 transitions. Word has length 119 [2021-12-06 18:25:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:08,338 INFO L470 AbstractCegarLoop]: Abstraction has 195512 states and 330241 transitions. [2021-12-06 18:25:08,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 10 states have internal predecessors, (82), 5 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-06 18:25:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 195512 states and 330241 transitions. [2021-12-06 18:25:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:25:08,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:08,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:08,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:25:08,370 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1622170436, now seen corresponding path program 1 times [2021-12-06 18:25:08,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:08,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785342413] [2021-12-06 18:25:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:08,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:25:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:25:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:25:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:25:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:25:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:25:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:25:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:25:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:25:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:25:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:25:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:25:08,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785342413] [2021-12-06 18:25:08,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785342413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:25:08,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:25:08,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 18:25:08,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624834082] [2021-12-06 18:25:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:25:08,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:25:08,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:25:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:25:08,467 INFO L87 Difference]: Start difference. First operand 195512 states and 330241 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:25:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:16,953 INFO L93 Difference]: Finished difference Result 197526 states and 339680 transitions. [2021-12-06 18:25:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:25:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 120 [2021-12-06 18:25:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:17,532 INFO L225 Difference]: With dead ends: 197526 [2021-12-06 18:25:17,533 INFO L226 Difference]: Without dead ends: 196056 [2021-12-06 18:25:17,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:25:17,591 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 2707 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2722 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:17,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2722 Valid, 2008 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1079 Valid, 2925 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 18:25:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196056 states. [2021-12-06 18:25:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196056 to 195574. [2021-12-06 18:25:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195574 states, 165079 states have (on average 1.5858407186862047) internal successors, (261789), 164983 states have internal predecessors, (261789), 30445 states have call successors, (30445), 44 states have call predecessors, (30445), 49 states have return successors, (38103), 30555 states have call predecessors, (38103), 30442 states have call successors, (38103) [2021-12-06 18:25:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195574 states to 195574 states and 330337 transitions. [2021-12-06 18:25:26,734 INFO L78 Accepts]: Start accepts. Automaton has 195574 states and 330337 transitions. Word has length 120 [2021-12-06 18:25:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:26,735 INFO L470 AbstractCegarLoop]: Abstraction has 195574 states and 330337 transitions. [2021-12-06 18:25:26,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:25:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 195574 states and 330337 transitions. [2021-12-06 18:25:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:25:26,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:26,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:26,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:25:26,765 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash -382873372, now seen corresponding path program 1 times [2021-12-06 18:25:26,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:26,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919450036] [2021-12-06 18:25:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:26,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:25:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:25:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:25:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:25:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:25:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:25:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:25:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:25:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:25:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:25:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:25:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:25:26,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919450036] [2021-12-06 18:25:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919450036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:25:26,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:25:26,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:25:26,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791038296] [2021-12-06 18:25:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:25:26,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:25:26,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:25:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:25:26,836 INFO L87 Difference]: Start difference. First operand 195574 states and 330337 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:25:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:38,947 INFO L93 Difference]: Finished difference Result 295005 states and 516830 transitions. [2021-12-06 18:25:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:25:38,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-12-06 18:25:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:40,052 INFO L225 Difference]: With dead ends: 295005 [2021-12-06 18:25:40,052 INFO L226 Difference]: Without dead ends: 294680 [2021-12-06 18:25:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:25:40,142 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 2750 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 1210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2760 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1210 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:40,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2760 Valid, 1773 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1210 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 18:25:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294680 states. [2021-12-06 18:25:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294680 to 292947. [2021-12-06 18:25:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292947 states, 247303 states have (on average 1.5860867033558024) internal successors, (392244), 247105 states have internal predecessors, (392244), 45566 states have call successors, (45566), 69 states have call predecessors, (45566), 77 states have return successors, (64046), 45787 states have call predecessors, (64046), 45561 states have call successors, (64046) [2021-12-06 18:25:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292947 states to 292947 states and 501856 transitions. [2021-12-06 18:25:55,498 INFO L78 Accepts]: Start accepts. Automaton has 292947 states and 501856 transitions. Word has length 120 [2021-12-06 18:25:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:55,499 INFO L470 AbstractCegarLoop]: Abstraction has 292947 states and 501856 transitions. [2021-12-06 18:25:55,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:25:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 292947 states and 501856 transitions. [2021-12-06 18:25:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:25:55,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:55,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:55,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:25:55,550 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash 39828454, now seen corresponding path program 1 times [2021-12-06 18:25:55,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:55,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167873575] [2021-12-06 18:25:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:55,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:25:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:25:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:25:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:25:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:25:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:25:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:25:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:25:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:25:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:25:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:25:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:25:55,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167873575] [2021-12-06 18:25:55,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167873575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:25:55,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:25:55,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:25:55,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012089635] [2021-12-06 18:25:55,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:25:55,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:25:55,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:25:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:25:55,633 INFO L87 Difference]: Start difference. First operand 292947 states and 501856 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:26:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:06,790 INFO L93 Difference]: Finished difference Result 294464 states and 513735 transitions. [2021-12-06 18:26:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:26:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-12-06 18:26:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:07,906 INFO L225 Difference]: With dead ends: 294464 [2021-12-06 18:26:07,906 INFO L226 Difference]: Without dead ends: 293736 [2021-12-06 18:26:07,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:26:07,995 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1480 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1051 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:26:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293736 states. [2021-12-06 18:26:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293736 to 293080. [2021-12-06 18:26:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293080 states, 247409 states have (on average 1.5860215271069362) internal successors, (392396), 247215 states have internal predecessors, (392396), 45561 states have call successors, (45561), 97 states have call predecessors, (45561), 109 states have return successors, (64039), 45782 states have call predecessors, (64039), 45556 states have call successors, (64039) [2021-12-06 18:26:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293080 states to 293080 states and 501996 transitions. [2021-12-06 18:26:23,906 INFO L78 Accepts]: Start accepts. Automaton has 293080 states and 501996 transitions. Word has length 120 [2021-12-06 18:26:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:23,907 INFO L470 AbstractCegarLoop]: Abstraction has 293080 states and 501996 transitions. [2021-12-06 18:26:23,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:26:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 293080 states and 501996 transitions. [2021-12-06 18:26:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 18:26:24,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:24,400 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:24,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:26:24,400 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1431887885, now seen corresponding path program 1 times [2021-12-06 18:26:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:24,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753538886] [2021-12-06 18:26:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:24,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:26:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:26:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:26:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:26:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:26:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:26:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:26:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:26:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:26:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:26:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:26:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 18:26:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-06 18:26:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 18:26:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 18:26:24,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753538886] [2021-12-06 18:26:24,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753538886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:24,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:24,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:26:24,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33721402] [2021-12-06 18:26:24,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:24,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:26:24,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:26:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:26:24,659 INFO L87 Difference]: Start difference. First operand 293080 states and 501996 transitions. Second operand has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 18:26:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:36,225 INFO L93 Difference]: Finished difference Result 294479 states and 513732 transitions. [2021-12-06 18:26:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:26:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 178 [2021-12-06 18:26:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:37,194 INFO L225 Difference]: With dead ends: 294479 [2021-12-06 18:26:37,194 INFO L226 Difference]: Without dead ends: 293886 [2021-12-06 18:26:37,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:26:37,292 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1224 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:37,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1676 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:26:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293886 states. [2021-12-06 18:26:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293886 to 293080. [2021-12-06 18:26:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293080 states, 247409 states have (on average 1.5860094014364878) internal successors, (392393), 247215 states have internal predecessors, (392393), 45561 states have call successors, (45561), 97 states have call predecessors, (45561), 109 states have return successors, (64039), 45782 states have call predecessors, (64039), 45556 states have call successors, (64039) [2021-12-06 18:26:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293080 states to 293080 states and 501993 transitions. [2021-12-06 18:26:52,850 INFO L78 Accepts]: Start accepts. Automaton has 293080 states and 501993 transitions. Word has length 178 [2021-12-06 18:26:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:52,850 INFO L470 AbstractCegarLoop]: Abstraction has 293080 states and 501993 transitions. [2021-12-06 18:26:52,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 18:26:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 293080 states and 501993 transitions. [2021-12-06 18:26:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 18:26:53,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:53,336 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:53,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 18:26:53,337 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 548378895, now seen corresponding path program 1 times [2021-12-06 18:26:53,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352307278] [2021-12-06 18:26:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:53,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:26:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:26:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:26:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:26:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:26:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:26:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:26:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:26:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:26:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:26:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:26:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 18:26:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-06 18:26:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 18:26:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 18:26:53,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352307278] [2021-12-06 18:26:53,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352307278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:53,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:53,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:26:53,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173302000] [2021-12-06 18:26:53,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:53,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:26:53,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:26:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:26:53,462 INFO L87 Difference]: Start difference. First operand 293080 states and 501993 transitions. Second operand has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 18:27:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:04,974 INFO L93 Difference]: Finished difference Result 294077 states and 513129 transitions. [2021-12-06 18:27:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:27:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 178 [2021-12-06 18:27:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:06,098 INFO L225 Difference]: With dead ends: 294077 [2021-12-06 18:27:06,099 INFO L226 Difference]: Without dead ends: 293481 [2021-12-06 18:27:06,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:27:06,193 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 1184 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:06,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1637 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:27:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293481 states. [2021-12-06 18:27:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293481 to 292859. [2021-12-06 18:27:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292859 states, 247236 states have (on average 1.586144412625993) internal successors, (392152), 247034 states have internal predecessors, (392152), 45529 states have call successors, (45529), 85 states have call predecessors, (45529), 93 states have return successors, (63999), 45750 states have call predecessors, (63999), 45524 states have call successors, (63999) [2021-12-06 18:27:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292859 states to 292859 states and 501680 transitions. [2021-12-06 18:27:21,708 INFO L78 Accepts]: Start accepts. Automaton has 292859 states and 501680 transitions. Word has length 178 [2021-12-06 18:27:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:21,708 INFO L470 AbstractCegarLoop]: Abstraction has 292859 states and 501680 transitions. [2021-12-06 18:27:21,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 18:27:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 292859 states and 501680 transitions. [2021-12-06 18:27:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-06 18:27:22,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:22,197 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:22,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 18:27:22,198 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash 620893310, now seen corresponding path program 1 times [2021-12-06 18:27:22,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857601844] [2021-12-06 18:27:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:22,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:27:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:27:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:27:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:27:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:27:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:27:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:27:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:27:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:27:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:27:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:27:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:27:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 18:27:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 18:27:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-06 18:27:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 18:27:22,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857601844] [2021-12-06 18:27:22,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857601844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258236014] [2021-12-06 18:27:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:22,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:22,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:22,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:27:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:27:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:27:23,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:27:23,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258236014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:23,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:27:23,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [22] total 34 [2021-12-06 18:27:23,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975519111] [2021-12-06 18:27:23,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:23,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:27:23,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:27:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:27:23,016 INFO L87 Difference]: Start difference. First operand 292859 states and 501680 transitions. Second operand has 14 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 7 states have call successors, (18), 4 states have call predecessors, (18), 7 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-06 18:27:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:34,654 INFO L93 Difference]: Finished difference Result 293456 states and 502507 transitions. [2021-12-06 18:27:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:27:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 7 states have call successors, (18), 4 states have call predecessors, (18), 7 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 179 [2021-12-06 18:27:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:35,608 INFO L225 Difference]: With dead ends: 293456 [2021-12-06 18:27:35,608 INFO L226 Difference]: Without dead ends: 293136 [2021-12-06 18:27:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:27:35,703 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 828 mSDsluCounter, 2547 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:35,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 3026 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:27:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293136 states. [2021-12-06 18:27:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293136 to 293010. [2021-12-06 18:27:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293010 states, 247355 states have (on average 1.5860686058498918) internal successors, (392322), 247155 states have internal predecessors, (392322), 45547 states have call successors, (45547), 100 states have call predecessors, (45547), 107 states have return successors, (64020), 45768 states have call predecessors, (64020), 45542 states have call successors, (64020) [2021-12-06 18:27:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293010 states to 293010 states and 501889 transitions. [2021-12-06 18:27:51,282 INFO L78 Accepts]: Start accepts. Automaton has 293010 states and 501889 transitions. Word has length 179 [2021-12-06 18:27:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:51,282 INFO L470 AbstractCegarLoop]: Abstraction has 293010 states and 501889 transitions. [2021-12-06 18:27:51,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 7 states have call successors, (18), 4 states have call predecessors, (18), 7 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-06 18:27:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 293010 states and 501889 transitions. [2021-12-06 18:27:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 18:27:51,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:51,903 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:51,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:27:52,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:27:52,105 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1915922890, now seen corresponding path program 1 times [2021-12-06 18:27:52,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:52,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835056119] [2021-12-06 18:27:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:52,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:27:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:27:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:27:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:27:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:27:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:27:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:27:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:27:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:27:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:27:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:27:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:27:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:27:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-06 18:27:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 18:27:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 18:27:52,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835056119] [2021-12-06 18:27:52,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835056119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114031780] [2021-12-06 18:27:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:52,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:52,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:52,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:27:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:27:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:27:52,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 18:27:52,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114031780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:52,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:52,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 28 [2021-12-06 18:27:52,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279528477] [2021-12-06 18:27:52,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:52,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:27:52,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:27:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-12-06 18:27:52,979 INFO L87 Difference]: Start difference. First operand 293010 states and 501889 transitions. Second operand has 28 states, 27 states have (on average 10.37037037037037) internal successors, (280), 23 states have internal predecessors, (280), 6 states have call successors, (43), 10 states have call predecessors, (43), 9 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-06 18:28:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:57,820 INFO L93 Difference]: Finished difference Result 1174019 states and 2081662 transitions. [2021-12-06 18:28:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-06 18:28:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 10.37037037037037) internal successors, (280), 23 states have internal predecessors, (280), 6 states have call successors, (43), 10 states have call predecessors, (43), 9 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) Word has length 180 [2021-12-06 18:28:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:02,997 INFO L225 Difference]: With dead ends: 1174019 [2021-12-06 18:29:02,997 INFO L226 Difference]: Without dead ends: 1173500 [2021-12-06 18:29:03,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12428 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4306, Invalid=29734, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 18:29:03,423 INFO L933 BasicCegarLoop]: 1080 mSDtfsCounter, 7537 mSDsluCounter, 5402 mSDsCounter, 0 mSdLazyCounter, 24345 mSolverCounterSat, 5777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7537 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 30122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5777 IncrementalHoareTripleChecker+Valid, 24345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:03,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7537 Valid, 6482 Invalid, 30122 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5777 Valid, 24345 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-12-06 18:29:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173500 states. [2021-12-06 18:30:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173500 to 1162864. [2021-12-06 18:30:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162864 states, 981877 states have (on average 1.5866620768181758) internal successors, (1557907), 980767 states have internal predecessors, (1557907), 180713 states have call successors, (180713), 247 states have call predecessors, (180713), 273 states have return successors, (284029), 181883 states have call predecessors, (284029), 180703 states have call successors, (284029) [2021-12-06 18:30:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162864 states to 1162864 states and 2022649 transitions. [2021-12-06 18:30:18,818 INFO L78 Accepts]: Start accepts. Automaton has 1162864 states and 2022649 transitions. Word has length 180 [2021-12-06 18:30:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:18,819 INFO L470 AbstractCegarLoop]: Abstraction has 1162864 states and 2022649 transitions. [2021-12-06 18:30:18,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 10.37037037037037) internal successors, (280), 23 states have internal predecessors, (280), 6 states have call successors, (43), 10 states have call predecessors, (43), 9 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-06 18:30:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1162864 states and 2022649 transitions. [2021-12-06 18:30:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 18:30:21,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:21,543 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:21,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:30:21,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 18:30:21,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1596811260, now seen corresponding path program 1 times [2021-12-06 18:30:21,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008232229] [2021-12-06 18:30:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:21,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:30:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:30:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:30:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:30:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:30:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:30:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:30:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:30:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:30:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:30:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:30:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:30:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:30:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-06 18:30:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 18:30:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 18:30:21,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008232229] [2021-12-06 18:30:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008232229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284130726] [2021-12-06 18:30:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:21,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:21,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:21,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:21,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:30:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:30:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 18:30:22,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:30:22,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284130726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:30:22,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:30:22,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2021-12-06 18:30:22,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39865274] [2021-12-06 18:30:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:30:22,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:30:22,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:30:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:30:22,431 INFO L87 Difference]: Start difference. First operand 1162864 states and 2022649 transitions. Second operand has 11 states, 10 states have (on average 13.2) internal successors, (132), 11 states have internal predecessors, (132), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-06 18:31:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:12,279 INFO L93 Difference]: Finished difference Result 1164566 states and 2025193 transitions. [2021-12-06 18:31:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:31:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 11 states have internal predecessors, (132), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) Word has length 180 [2021-12-06 18:31:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:17,047 INFO L225 Difference]: With dead ends: 1164566 [2021-12-06 18:31:17,047 INFO L226 Difference]: Without dead ends: 1163118 [2021-12-06 18:31:17,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:31:17,472 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 501 mSDsluCounter, 3879 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 4364 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:17,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 4364 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:31:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163118 states. [2021-12-06 18:32:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163118 to 1162864. [2021-12-06 18:32:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162864 states, 981877 states have (on average 1.5866559660731436) internal successors, (1557901), 980767 states have internal predecessors, (1557901), 180713 states have call successors, (180713), 247 states have call predecessors, (180713), 273 states have return successors, (284029), 181883 states have call predecessors, (284029), 180703 states have call successors, (284029) [2021-12-06 18:32:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162864 states to 1162864 states and 2022643 transitions. [2021-12-06 18:32:31,665 INFO L78 Accepts]: Start accepts. Automaton has 1162864 states and 2022643 transitions. Word has length 180 [2021-12-06 18:32:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:31,665 INFO L470 AbstractCegarLoop]: Abstraction has 1162864 states and 2022643 transitions. [2021-12-06 18:32:31,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 11 states have internal predecessors, (132), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-06 18:32:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1162864 states and 2022643 transitions. [2021-12-06 18:32:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 18:32:34,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:34,601 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:34,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 18:32:34,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:32:34,803 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash -577868837, now seen corresponding path program 1 times [2021-12-06 18:32:34,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:34,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415971868] [2021-12-06 18:32:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:34,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:32:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:32:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:32:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:32:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:32:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:32:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:32:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:32:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:32:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:32:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:32:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:32:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:32:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:32:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 18:32:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-06 18:32:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 18:32:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 18:32:34,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415971868] [2021-12-06 18:32:34,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415971868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275128515] [2021-12-06 18:32:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:34,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:34,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:34,979 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:34,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65403e13-77db-48ae-aeb9-b36e95117970/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:32:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:32:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:32:35,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:32:35,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275128515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:32:35,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:32:35,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2021-12-06 18:32:35,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565587358] [2021-12-06 18:32:35,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:32:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:32:35,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:32:35,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:32:35,318 INFO L87 Difference]: Start difference. First operand 1162864 states and 2022643 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17)