./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF --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 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:50:35,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:50:35,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:50:35,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:50:35,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:50:35,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:50:35,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:50:35,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:50:35,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:50:35,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:50:35,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:50:35,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:50:35,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:50:35,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:50:35,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:50:35,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:50:35,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:50:35,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:50:35,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:50:35,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:50:35,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:50:35,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:50:35,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:50:35,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:50:35,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:50:35,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:50:35,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:50:35,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:50:35,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:50:35,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:50:35,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:50:35,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:50:35,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:50:35,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:50:35,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:50:35,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:50:35,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:50:35,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:50:35,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:50:35,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:50:35,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:50:35,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:50:35,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:50:35,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:50:35,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:50:35,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:50:35,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:50:35,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:50:35,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:50:35,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:50:35,400 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:50:35,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:50:35,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:50:35,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:50:35,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:50:35,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:50:35,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:50:35,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:50:35,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:50:35,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:50:35,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:50:35,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:50:35,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:50:35,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:50:35,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:50:35,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:50:35,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:50:35,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:50:35,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:50:35,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:50:35,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:50:35,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:50:35,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:50:35,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:50:35,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:50:35,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:50:35,406 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_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-11-20 06:50:35,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:50:35,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:50:35,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:50:35,677 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:50:35,678 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:50:35,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-20 06:50:35,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/data/3a8cfda70/770c37a9dc77405c95692854bca2255c/FLAGae4ee4067 [2021-11-20 06:50:36,359 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:50:36,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-20 06:50:36,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/data/3a8cfda70/770c37a9dc77405c95692854bca2255c/FLAGae4ee4067 [2021-11-20 06:50:36,602 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/data/3a8cfda70/770c37a9dc77405c95692854bca2255c [2021-11-20 06:50:36,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:50:36,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:50:36,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:50:36,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:50:36,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:50:36,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:50:36" (1/1) ... [2021-11-20 06:50:36,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8959c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:36, skipping insertion in model container [2021-11-20 06:50:36,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:50:36" (1/1) ... [2021-11-20 06:50:36,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:50:36,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:50:37,081 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_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-20 06:50:37,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:50:37,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:50:37,340 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_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-20 06:50:37,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:50:37,453 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:50:37,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37 WrapperNode [2021-11-20 06:50:37,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:50:37,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:50:37,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:50:37,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:50:37,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,562 INFO L137 Inliner]: procedures = 90, calls = 333, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 791 [2021-11-20 06:50:37,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:50:37,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:50:37,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:50:37,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:50:37,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:50:37,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:50:37,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:50:37,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:50:37,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (1/1) ... [2021-11-20 06:50:37,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:50:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:37,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:50:37,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:50:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 06:50:37,733 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 06:50:37,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:50:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 06:50:37,734 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 06:50:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 06:50:37,734 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 06:50:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 06:50:37,734 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 06:50:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 06:50:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 06:50:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 06:50:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 06:50:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 06:50:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 06:50:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 06:50:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 06:50:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 06:50:37,736 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 06:50:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 06:50:37,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 06:50:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 06:50:37,736 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 06:50:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 06:50:37,736 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 06:50:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 06:50:37,737 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 06:50:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 06:50:37,737 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 06:50:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 06:50:37,737 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 06:50:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 06:50:37,737 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 06:50:37,737 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 06:50:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 06:50:37,738 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 06:50:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 06:50:37,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:50:37,738 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 06:50:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 06:50:37,738 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 06:50:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 06:50:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 06:50:37,739 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 06:50:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:50:37,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:50:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 06:50:37,739 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 06:50:37,868 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:50:37,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:50:39,039 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:50:39,066 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:50:39,066 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:50:39,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:50:39 BoogieIcfgContainer [2021-11-20 06:50:39,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:50:39,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:50:39,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:50:39,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:50:39,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:50:36" (1/3) ... [2021-11-20 06:50:39,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d4588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:50:39, skipping insertion in model container [2021-11-20 06:50:39,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:50:37" (2/3) ... [2021-11-20 06:50:39,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d4588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:50:39, skipping insertion in model container [2021-11-20 06:50:39,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:50:39" (3/3) ... [2021-11-20 06:50:39,096 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2021-11-20 06:50:39,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:50:39,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:50:39,175 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:50:39,182 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:50:39,182 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:50:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 539 states, 424 states have (on average 1.705188679245283) internal successors, (723), 445 states have internal predecessors, (723), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-20 06:50:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:50:39,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:39,241 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:39,242 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1594208609, now seen corresponding path program 1 times [2021-11-20 06:50:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718495981] [2021-11-20 06:50:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:39,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:39,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:50:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:50:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:50:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:50:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:50:40,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:40,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718495981] [2021-11-20 06:50:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718495981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162616243] [2021-11-20 06:50:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:40,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:40,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:50:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:50:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:50:41,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:41,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162616243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:41,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:41,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-11-20 06:50:41,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018559376] [2021-11-20 06:50:41,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:50:41,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:50:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:41,255 INFO L87 Difference]: Start difference. First operand has 539 states, 424 states have (on average 1.705188679245283) internal successors, (723), 445 states have internal predecessors, (723), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:50:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:41,372 INFO L93 Difference]: Finished difference Result 560 states and 935 transitions. [2021-11-20 06:50:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:50:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-20 06:50:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:41,400 INFO L225 Difference]: With dead ends: 560 [2021-11-20 06:50:41,400 INFO L226 Difference]: Without dead ends: 531 [2021-11-20 06:50:41,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:41,411 INFO L933 BasicCegarLoop]: 896 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, 896 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 [2021-11-20 06:50:41,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-20 06:50:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-20 06:50:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.7033492822966507) internal successors, (712), 437 states have internal predecessors, (712), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:50:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 889 transitions. [2021-11-20 06:50:41,520 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 889 transitions. Word has length 97 [2021-11-20 06:50:41,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:41,522 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 889 transitions. [2021-11-20 06:50:41,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:50:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 889 transitions. [2021-11-20 06:50:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:50:41,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:41,532 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:41,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:41,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:41,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:41,750 INFO L85 PathProgramCache]: Analyzing trace with hash -365707531, now seen corresponding path program 1 times [2021-11-20 06:50:41,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:41,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764634771] [2021-11-20 06:50:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:41,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:41,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:41,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:50:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:50:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:50:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:50:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:50:42,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764634771] [2021-11-20 06:50:42,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764634771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:42,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088433262] [2021-11-20 06:50:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:42,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:42,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:42,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:50:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:42,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:50:42,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:42,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088433262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:42,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:42,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:42,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372879205] [2021-11-20 06:50:42,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:42,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:42,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:42,951 INFO L87 Difference]: Start difference. First operand 531 states and 889 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:43,084 INFO L93 Difference]: Finished difference Result 1053 states and 1770 transitions. [2021-11-20 06:50:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-20 06:50:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:43,092 INFO L225 Difference]: With dead ends: 1053 [2021-11-20 06:50:43,092 INFO L226 Difference]: Without dead ends: 531 [2021-11-20 06:50:43,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:43,103 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 14 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:43,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2618 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-20 06:50:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-20 06:50:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.700956937799043) internal successors, (711), 437 states have internal predecessors, (711), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:50:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 888 transitions. [2021-11-20 06:50:43,173 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 888 transitions. Word has length 99 [2021-11-20 06:50:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:43,175 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 888 transitions. [2021-11-20 06:50:43,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 888 transitions. [2021-11-20 06:50:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:50:43,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:43,183 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:43,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:43,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:43,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1062806691, now seen corresponding path program 1 times [2021-11-20 06:50:43,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:43,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648758333] [2021-11-20 06:50:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:43,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:50:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:50:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:50:43,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648758333] [2021-11-20 06:50:43,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648758333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546656527] [2021-11-20 06:50:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:43,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:43,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:43,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:50:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:50:44,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:44,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546656527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:44,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:44,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:44,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258266137] [2021-11-20 06:50:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:44,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:44,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:44,555 INFO L87 Difference]: Start difference. First operand 531 states and 888 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:44,626 INFO L93 Difference]: Finished difference Result 1053 states and 1768 transitions. [2021-11-20 06:50:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-20 06:50:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:44,633 INFO L225 Difference]: With dead ends: 1053 [2021-11-20 06:50:44,633 INFO L226 Difference]: Without dead ends: 531 [2021-11-20 06:50:44,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:44,637 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 12 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:44,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2618 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-20 06:50:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-20 06:50:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.6985645933014355) internal successors, (710), 437 states have internal predecessors, (710), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:50:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 887 transitions. [2021-11-20 06:50:44,667 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 887 transitions. Word has length 101 [2021-11-20 06:50:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:44,668 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 887 transitions. [2021-11-20 06:50:44,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 887 transitions. [2021-11-20 06:50:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:50:44,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:44,672 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:44,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:44,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:44,895 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -706454475, now seen corresponding path program 1 times [2021-11-20 06:50:44,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874800585] [2021-11-20 06:50:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:44,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:50:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:50:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:50:45,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:45,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874800585] [2021-11-20 06:50:45,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874800585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:45,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852718622] [2021-11-20 06:50:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:45,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:45,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:45,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:50:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:50:45,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:45,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852718622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:45,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:45,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:45,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746579338] [2021-11-20 06:50:45,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:45,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:45,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:45,919 INFO L87 Difference]: Start difference. First operand 531 states and 887 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:46,000 INFO L93 Difference]: Finished difference Result 1060 states and 1775 transitions. [2021-11-20 06:50:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-20 06:50:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:46,008 INFO L225 Difference]: With dead ends: 1060 [2021-11-20 06:50:46,010 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 06:50:46,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:46,015 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 20 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:46,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2618 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 06:50:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-20 06:50:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 426 states have (on average 1.6948356807511737) internal successors, (722), 445 states have internal predecessors, (722), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:50:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 899 transitions. [2021-11-20 06:50:46,051 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 899 transitions. Word has length 103 [2021-11-20 06:50:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:46,057 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 899 transitions. [2021-11-20 06:50:46,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 899 transitions. [2021-11-20 06:50:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:50:46,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:46,064 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:46,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:46,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:46,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash -480058764, now seen corresponding path program 1 times [2021-11-20 06:50:46,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:46,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669998243] [2021-11-20 06:50:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:46,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:50:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:50:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:50:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:50:46,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:46,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669998243] [2021-11-20 06:50:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669998243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:46,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206915395] [2021-11-20 06:50:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:46,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:46,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:46,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:46,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:50:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:50:47,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:47,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206915395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:47,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:47,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:47,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076564217] [2021-11-20 06:50:47,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:47,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:47,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:47,266 INFO L87 Difference]: Start difference. First operand 540 states and 899 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:47,345 INFO L93 Difference]: Finished difference Result 1062 states and 1776 transitions. [2021-11-20 06:50:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-20 06:50:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:47,352 INFO L225 Difference]: With dead ends: 1062 [2021-11-20 06:50:47,352 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 06:50:47,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:47,357 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 18 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:47,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2618 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 06:50:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-20 06:50:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 426 states have (on average 1.692488262910798) internal successors, (721), 445 states have internal predecessors, (721), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:50:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 898 transitions. [2021-11-20 06:50:47,384 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 898 transitions. Word has length 104 [2021-11-20 06:50:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:47,385 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 898 transitions. [2021-11-20 06:50:47,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 898 transitions. [2021-11-20 06:50:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:50:47,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:47,389 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:47,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:47,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:47,602 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash 701773849, now seen corresponding path program 1 times [2021-11-20 06:50:47,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:47,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363331700] [2021-11-20 06:50:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:47,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:50:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:50:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:50:48,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:48,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363331700] [2021-11-20 06:50:48,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363331700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:48,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933923858] [2021-11-20 06:50:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:48,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:48,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:48,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:48,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:50:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:48,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:50:48,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:48,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933923858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:48,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:48,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:48,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64258362] [2021-11-20 06:50:48,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:48,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:48,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:48,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:48,588 INFO L87 Difference]: Start difference. First operand 540 states and 898 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:48,667 INFO L93 Difference]: Finished difference Result 1062 states and 1775 transitions. [2021-11-20 06:50:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-20 06:50:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:48,673 INFO L225 Difference]: With dead ends: 1062 [2021-11-20 06:50:48,674 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 06:50:48,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:48,679 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 17 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:48,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2618 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 06:50:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-20 06:50:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 426 states have (on average 1.6901408450704225) internal successors, (720), 445 states have internal predecessors, (720), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:50:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 897 transitions. [2021-11-20 06:50:48,708 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 897 transitions. Word has length 105 [2021-11-20 06:50:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:48,708 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 897 transitions. [2021-11-20 06:50:48,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 897 transitions. [2021-11-20 06:50:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:50:48,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:48,713 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:48,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:48,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:48,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1437379352, now seen corresponding path program 1 times [2021-11-20 06:50:48,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:48,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799226252] [2021-11-20 06:50:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:48,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:50:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:50:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:50:49,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799226252] [2021-11-20 06:50:49,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799226252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720392214] [2021-11-20 06:50:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:49,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:49,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:50:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:50:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:49,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:49,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720392214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:49,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:49,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-20 06:50:49,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749565328] [2021-11-20 06:50:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:49,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:49,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:50:49,994 INFO L87 Difference]: Start difference. First operand 540 states and 897 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:50,126 INFO L93 Difference]: Finished difference Result 1081 states and 1805 transitions. [2021-11-20 06:50:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-20 06:50:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:50,135 INFO L225 Difference]: With dead ends: 1081 [2021-11-20 06:50:50,135 INFO L226 Difference]: Without dead ends: 563 [2021-11-20 06:50:50,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:50:50,139 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 148 mSDsluCounter, 4272 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:50,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5148 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-20 06:50:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2021-11-20 06:50:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 442 states have (on average 1.6877828054298643) internal successors, (746), 463 states have internal predecessors, (746), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-11-20 06:50:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 928 transitions. [2021-11-20 06:50:50,171 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 928 transitions. Word has length 106 [2021-11-20 06:50:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:50,172 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 928 transitions. [2021-11-20 06:50:50,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 928 transitions. [2021-11-20 06:50:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:50:50,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:50,177 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:50,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:50,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:50,392 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1052012569, now seen corresponding path program 1 times [2021-11-20 06:50:50,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177245371] [2021-11-20 06:50:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:50,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:50:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:50:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:50:50,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177245371] [2021-11-20 06:50:50,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177245371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718348450] [2021-11-20 06:50:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:50,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:50,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:50,807 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:50,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:50:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:51,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:51,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718348450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:51,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:51,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:51,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586923513] [2021-11-20 06:50:51,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:51,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:51,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:51,335 INFO L87 Difference]: Start difference. First operand 559 states and 928 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:51,493 INFO L93 Difference]: Finished difference Result 1122 states and 1879 transitions. [2021-11-20 06:50:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-20 06:50:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:51,500 INFO L225 Difference]: With dead ends: 1122 [2021-11-20 06:50:51,500 INFO L226 Difference]: Without dead ends: 559 [2021-11-20 06:50:51,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:51,504 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 135 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:51,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2435 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-20 06:50:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-20 06:50:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 442 states have (on average 1.6764705882352942) internal successors, (741), 463 states have internal predecessors, (741), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-11-20 06:50:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 923 transitions. [2021-11-20 06:50:51,534 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 923 transitions. Word has length 106 [2021-11-20 06:50:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:51,534 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 923 transitions. [2021-11-20 06:50:51,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 923 transitions. [2021-11-20 06:50:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 06:50:51,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:51,539 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:51,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:51,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:51,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1192894943, now seen corresponding path program 1 times [2021-11-20 06:50:51,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:51,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392508193] [2021-11-20 06:50:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:51,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:50:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:51,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:50:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:50:52,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392508193] [2021-11-20 06:50:52,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392508193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274874141] [2021-11-20 06:50:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:52,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:52,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:52,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:50:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:52,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:52,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274874141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:52,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:52,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:52,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873162451] [2021-11-20 06:50:52,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:52,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:52,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:52,674 INFO L87 Difference]: Start difference. First operand 559 states and 923 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:52,804 INFO L93 Difference]: Finished difference Result 1122 states and 1869 transitions. [2021-11-20 06:50:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2021-11-20 06:50:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:52,810 INFO L225 Difference]: With dead ends: 1122 [2021-11-20 06:50:52,810 INFO L226 Difference]: Without dead ends: 559 [2021-11-20 06:50:52,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:52,816 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 129 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:52,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2435 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-20 06:50:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-20 06:50:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 442 states have (on average 1.665158371040724) internal successors, (736), 463 states have internal predecessors, (736), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-11-20 06:50:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 918 transitions. [2021-11-20 06:50:52,860 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 918 transitions. Word has length 108 [2021-11-20 06:50:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:52,861 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 918 transitions. [2021-11-20 06:50:52,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 918 transitions. [2021-11-20 06:50:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 06:50:52,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:52,865 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:52,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:53,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:53,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash 973349433, now seen corresponding path program 1 times [2021-11-20 06:50:53,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:53,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083677349] [2021-11-20 06:50:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:53,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:50:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:50:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:50:53,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:53,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083677349] [2021-11-20 06:50:53,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083677349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:53,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315239610] [2021-11-20 06:50:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:53,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:53,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:53,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:50:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:54,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:54,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315239610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:54,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:54,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:54,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679989197] [2021-11-20 06:50:54,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:54,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:54,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:54,020 INFO L87 Difference]: Start difference. First operand 559 states and 918 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:54,183 INFO L93 Difference]: Finished difference Result 1158 states and 1917 transitions. [2021-11-20 06:50:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-11-20 06:50:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:54,189 INFO L225 Difference]: With dead ends: 1158 [2021-11-20 06:50:54,190 INFO L226 Difference]: Without dead ends: 625 [2021-11-20 06:50:54,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:54,193 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 179 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:54,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-20 06:50:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 610. [2021-11-20 06:50:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 492 states have (on average 1.66869918699187) internal successors, (821), 513 states have internal predecessors, (821), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-11-20 06:50:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1002 transitions. [2021-11-20 06:50:54,252 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1002 transitions. Word has length 110 [2021-11-20 06:50:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:54,252 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1002 transitions. [2021-11-20 06:50:54,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1002 transitions. [2021-11-20 06:50:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:50:54,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:54,261 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:54,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:54,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:50:54,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash -806284545, now seen corresponding path program 1 times [2021-11-20 06:50:54,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:54,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816364367] [2021-11-20 06:50:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:54,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:50:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:50:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:50:54,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:54,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816364367] [2021-11-20 06:50:54,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816364367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:54,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197471774] [2021-11-20 06:50:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:54,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:54,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:54,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:50:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:50:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:55,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:55,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197471774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:55,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:55,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-20 06:50:55,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112859574] [2021-11-20 06:50:55,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:55,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:50:55,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:50:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:50:55,521 INFO L87 Difference]: Start difference. First operand 610 states and 1002 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:55,681 INFO L93 Difference]: Finished difference Result 1150 states and 1897 transitions. [2021-11-20 06:50:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:50:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-20 06:50:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:55,687 INFO L225 Difference]: With dead ends: 1150 [2021-11-20 06:50:55,687 INFO L226 Difference]: Without dead ends: 632 [2021-11-20 06:50:55,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:50:55,691 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 177 mSDsluCounter, 5034 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5890 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:55,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5890 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-20 06:50:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 610. [2021-11-20 06:50:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 492 states have (on average 1.66869918699187) internal successors, (821), 513 states have internal predecessors, (821), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-11-20 06:50:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1002 transitions. [2021-11-20 06:50:55,718 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1002 transitions. Word has length 111 [2021-11-20 06:50:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:55,718 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1002 transitions. [2021-11-20 06:50:55,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1002 transitions. [2021-11-20 06:50:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:50:55,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:55,722 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:55,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:55,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:50:55,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash 996001823, now seen corresponding path program 1 times [2021-11-20 06:50:55,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:55,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728693445] [2021-11-20 06:50:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:55,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:50:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:50:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:50:56,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728693445] [2021-11-20 06:50:56,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728693445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937786750] [2021-11-20 06:50:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:56,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:56,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:56,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:56,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:50:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:56,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937786750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:56,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:56,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:50:56,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91324750] [2021-11-20 06:50:56,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:56,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:56,847 INFO L87 Difference]: Start difference. First operand 610 states and 1002 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:57,006 INFO L93 Difference]: Finished difference Result 1158 states and 1915 transitions. [2021-11-20 06:50:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-20 06:50:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:57,013 INFO L225 Difference]: With dead ends: 1158 [2021-11-20 06:50:57,013 INFO L226 Difference]: Without dead ends: 610 [2021-11-20 06:50:57,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:57,017 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 173 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-20 06:50:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-20 06:50:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 492 states have (on average 1.6585365853658536) internal successors, (816), 513 states have internal predecessors, (816), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-11-20 06:50:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 997 transitions. [2021-11-20 06:50:57,043 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 997 transitions. Word has length 111 [2021-11-20 06:50:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:57,044 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 997 transitions. [2021-11-20 06:50:57,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:50:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 997 transitions. [2021-11-20 06:50:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:50:57,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:57,048 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:57,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:57,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:50:57,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:57,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1615772002, now seen corresponding path program 1 times [2021-11-20 06:50:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225831740] [2021-11-20 06:50:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:57,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:50:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:50:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:50:57,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225831740] [2021-11-20 06:50:57,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225831740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770243479] [2021-11-20 06:50:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:57,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:57,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:57,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:50:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:50:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:50:58,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:58,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770243479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:58,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:58,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-20 06:50:58,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216961397] [2021-11-20 06:50:58,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:58,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:58,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:50:58,225 INFO L87 Difference]: Start difference. First operand 610 states and 997 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:58,334 INFO L93 Difference]: Finished difference Result 1085 states and 1789 transitions. [2021-11-20 06:50:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-20 06:50:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:58,340 INFO L225 Difference]: With dead ends: 1085 [2021-11-20 06:50:58,341 INFO L226 Difference]: Without dead ends: 634 [2021-11-20 06:50:58,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:50:58,346 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 134 mSDsluCounter, 4239 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5107 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:58,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5107 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-20 06:50:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 629. [2021-11-20 06:50:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6574803149606299) internal successors, (842), 531 states have internal predecessors, (842), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:50:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1027 transitions. [2021-11-20 06:50:58,374 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1027 transitions. Word has length 111 [2021-11-20 06:50:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:58,374 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1027 transitions. [2021-11-20 06:50:58,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1027 transitions. [2021-11-20 06:50:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:50:58,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:58,379 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:58,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:58,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:50:58,605 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2082574163, now seen corresponding path program 1 times [2021-11-20 06:50:58,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:58,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131997371] [2021-11-20 06:50:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:58,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:50:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:50:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:50:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:50:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:50:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:50:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:50:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:59,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:50:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:50:59,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:59,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131997371] [2021-11-20 06:50:59,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131997371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:59,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813773814] [2021-11-20 06:50:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:59,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:59,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:59,017 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:59,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:50:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:50:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:50:59,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:59,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813773814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:59,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:59,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-20 06:50:59,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124871650] [2021-11-20 06:50:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:59,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:50:59,614 INFO L87 Difference]: Start difference. First operand 629 states and 1027 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:59,725 INFO L93 Difference]: Finished difference Result 1115 states and 1840 transitions. [2021-11-20 06:50:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-11-20 06:50:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:59,732 INFO L225 Difference]: With dead ends: 1115 [2021-11-20 06:50:59,732 INFO L226 Difference]: Without dead ends: 664 [2021-11-20 06:50:59,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:50:59,736 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 143 mSDsluCounter, 4229 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5097 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:59,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5097 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-20 06:50:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 629. [2021-11-20 06:50:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6574803149606299) internal successors, (842), 531 states have internal predecessors, (842), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:50:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1027 transitions. [2021-11-20 06:50:59,764 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1027 transitions. Word has length 112 [2021-11-20 06:50:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:59,765 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1027 transitions. [2021-11-20 06:50:59,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:50:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1027 transitions. [2021-11-20 06:50:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:50:59,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:59,770 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:50:59,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:59,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:59,991 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash -744370899, now seen corresponding path program 1 times [2021-11-20 06:50:59,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:59,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280579216] [2021-11-20 06:50:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:59,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:51:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:51:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:51:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:51:00,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:00,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280579216] [2021-11-20 06:51:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280579216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:00,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863949607] [2021-11-20 06:51:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:00,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:00,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:00,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:51:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:51:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:51:00,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863949607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:00,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:00,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-20 06:51:00,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901049839] [2021-11-20 06:51:00,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:00,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:51:00,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:51:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:00,900 INFO L87 Difference]: Start difference. First operand 629 states and 1027 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:01,083 INFO L93 Difference]: Finished difference Result 1100 states and 1814 transitions. [2021-11-20 06:51:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:51:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-11-20 06:51:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:01,089 INFO L225 Difference]: With dead ends: 1100 [2021-11-20 06:51:01,089 INFO L226 Difference]: Without dead ends: 649 [2021-11-20 06:51:01,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:51:01,096 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 177 mSDsluCounter, 5040 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5898 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:01,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5898 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-11-20 06:51:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 629. [2021-11-20 06:51:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6574803149606299) internal successors, (842), 531 states have internal predecessors, (842), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:51:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1027 transitions. [2021-11-20 06:51:01,128 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1027 transitions. Word has length 112 [2021-11-20 06:51:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:01,128 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1027 transitions. [2021-11-20 06:51:01,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1027 transitions. [2021-11-20 06:51:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:51:01,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:01,133 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:01,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:51:01,355 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash 461750229, now seen corresponding path program 1 times [2021-11-20 06:51:01,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:01,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464225793] [2021-11-20 06:51:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:01,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:51:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:51:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:51:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:51:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:51:01,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:01,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464225793] [2021-11-20 06:51:01,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464225793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866440843] [2021-11-20 06:51:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:01,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:01,737 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:01,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:51:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:51:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:51:02,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:02,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866440843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:02,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:02,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-20 06:51:02,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002380119] [2021-11-20 06:51:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:02,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:02,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:51:02,270 INFO L87 Difference]: Start difference. First operand 629 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:02,333 INFO L93 Difference]: Finished difference Result 1152 states and 1899 transitions. [2021-11-20 06:51:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:51:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-20 06:51:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:02,339 INFO L225 Difference]: With dead ends: 1152 [2021-11-20 06:51:02,339 INFO L226 Difference]: Without dead ends: 629 [2021-11-20 06:51:02,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:51:02,343 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 23 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:02,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2587 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:51:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-20 06:51:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-11-20 06:51:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6496062992125984) internal successors, (838), 531 states have internal predecessors, (838), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:51:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1023 transitions. [2021-11-20 06:51:02,373 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1023 transitions. Word has length 112 [2021-11-20 06:51:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:02,374 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1023 transitions. [2021-11-20 06:51:02,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1023 transitions. [2021-11-20 06:51:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:51:02,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:02,378 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:02,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:02,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:51:02,593 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1116279402, now seen corresponding path program 1 times [2021-11-20 06:51:02,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:02,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351420876] [2021-11-20 06:51:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:02,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:02,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:51:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:51:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:51:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:51:03,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351420876] [2021-11-20 06:51:03,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351420876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353361450] [2021-11-20 06:51:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:03,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:03,137 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:03,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:51:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:51:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:51:03,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:03,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353361450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:03,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:03,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-20 06:51:03,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189781459] [2021-11-20 06:51:03,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:03,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:51:03,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:51:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:51:03,701 INFO L87 Difference]: Start difference. First operand 629 states and 1023 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:03,859 INFO L93 Difference]: Finished difference Result 1100 states and 1811 transitions. [2021-11-20 06:51:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:51:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2021-11-20 06:51:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:03,865 INFO L225 Difference]: With dead ends: 1100 [2021-11-20 06:51:03,866 INFO L226 Difference]: Without dead ends: 649 [2021-11-20 06:51:03,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:51:03,869 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 185 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5854 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:03,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 5854 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-11-20 06:51:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 629. [2021-11-20 06:51:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6496062992125984) internal successors, (838), 531 states have internal predecessors, (838), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:51:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1023 transitions. [2021-11-20 06:51:03,896 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1023 transitions. Word has length 113 [2021-11-20 06:51:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:03,896 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1023 transitions. [2021-11-20 06:51:03,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1023 transitions. [2021-11-20 06:51:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 06:51:03,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:03,900 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:03,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:04,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:51:04,115 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash -588544878, now seen corresponding path program 1 times [2021-11-20 06:51:04,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824431624] [2021-11-20 06:51:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:04,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:51:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:51:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:51:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:51:04,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824431624] [2021-11-20 06:51:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824431624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7579578] [2021-11-20 06:51:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:04,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:04,513 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:04,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:51:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:51:04,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:51:05,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:05,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7579578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:05,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:05,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-11-20 06:51:05,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454911485] [2021-11-20 06:51:05,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:51:05,074 INFO L87 Difference]: Start difference. First operand 629 states and 1023 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:05,139 INFO L93 Difference]: Finished difference Result 1208 states and 1981 transitions. [2021-11-20 06:51:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:51:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-11-20 06:51:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:05,145 INFO L225 Difference]: With dead ends: 1208 [2021-11-20 06:51:05,145 INFO L226 Difference]: Without dead ends: 665 [2021-11-20 06:51:05,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:51:05,149 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 38 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:05,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2563 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:51:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-20 06:51:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 653. [2021-11-20 06:51:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 532 states have (on average 1.6278195488721805) internal successors, (866), 555 states have internal predecessors, (866), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:51:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1051 transitions. [2021-11-20 06:51:05,179 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1051 transitions. Word has length 114 [2021-11-20 06:51:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:05,180 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1051 transitions. [2021-11-20 06:51:05,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1051 transitions. [2021-11-20 06:51:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 06:51:05,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:05,184 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:05,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:05,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:51:05,409 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 939496016, now seen corresponding path program 1 times [2021-11-20 06:51:05,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:05,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098430320] [2021-11-20 06:51:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:05,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:51:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:51:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:51:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:51:05,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098430320] [2021-11-20 06:51:05,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098430320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657921033] [2021-11-20 06:51:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:05,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:05,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:05,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:05,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:51:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:51:06,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:51:06,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:06,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657921033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:06,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:06,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:51:06,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203673200] [2021-11-20 06:51:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:06,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:06,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:51:06,228 INFO L87 Difference]: Start difference. First operand 653 states and 1051 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:06,393 INFO L93 Difference]: Finished difference Result 1218 states and 2010 transitions. [2021-11-20 06:51:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:51:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-11-20 06:51:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:06,400 INFO L225 Difference]: With dead ends: 1218 [2021-11-20 06:51:06,400 INFO L226 Difference]: Without dead ends: 772 [2021-11-20 06:51:06,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:51:06,404 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 215 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:06,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2728 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-20 06:51:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 655. [2021-11-20 06:51:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 534 states have (on average 1.6254681647940075) internal successors, (868), 557 states have internal predecessors, (868), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-20 06:51:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1053 transitions. [2021-11-20 06:51:06,441 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1053 transitions. Word has length 114 [2021-11-20 06:51:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:06,442 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1053 transitions. [2021-11-20 06:51:06,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1053 transitions. [2021-11-20 06:51:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:51:06,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:06,447 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:06,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:06,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:06,673 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash -266827908, now seen corresponding path program 1 times [2021-11-20 06:51:06,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:06,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042655136] [2021-11-20 06:51:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:06,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:51:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:51:07,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:07,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042655136] [2021-11-20 06:51:07,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042655136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:07,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606855851] [2021-11-20 06:51:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:07,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:07,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:07,070 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:07,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:51:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:51:07,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:51:07,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:07,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606855851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:07,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:07,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-11-20 06:51:07,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026021612] [2021-11-20 06:51:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:51:07,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:51:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:51:07,743 INFO L87 Difference]: Start difference. First operand 655 states and 1053 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 06:51:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:11,526 INFO L93 Difference]: Finished difference Result 1937 states and 3235 transitions. [2021-11-20 06:51:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:51:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 117 [2021-11-20 06:51:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:11,541 INFO L225 Difference]: With dead ends: 1937 [2021-11-20 06:51:11,541 INFO L226 Difference]: Without dead ends: 1489 [2021-11-20 06:51:11,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:51:11,546 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 3978 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 4829 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4717 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 4829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:11,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4717 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 4829 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:51:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-11-20 06:51:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1324. [2021-11-20 06:51:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1048 states have (on average 1.6288167938931297) internal successors, (1707), 1095 states have internal predecessors, (1707), 218 states have call successors, (218), 44 states have call predecessors, (218), 57 states have return successors, (251), 215 states have call predecessors, (251), 213 states have call successors, (251) [2021-11-20 06:51:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 2176 transitions. [2021-11-20 06:51:11,619 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 2176 transitions. Word has length 117 [2021-11-20 06:51:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:11,620 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 2176 transitions. [2021-11-20 06:51:11,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 06:51:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 2176 transitions. [2021-11-20 06:51:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:51:11,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:11,627 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:11,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:11,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:11,849 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash -408092965, now seen corresponding path program 1 times [2021-11-20 06:51:11,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873088787] [2021-11-20 06:51:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:11,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:51:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:51:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:51:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:51:12,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873088787] [2021-11-20 06:51:12,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873088787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805645430] [2021-11-20 06:51:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:12,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:12,235 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:12,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:51:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:51:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:51:12,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:12,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805645430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:12,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:12,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-20 06:51:12,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685831716] [2021-11-20 06:51:12,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:12,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:51:12,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:51:12,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:51:12,726 INFO L87 Difference]: Start difference. First operand 1324 states and 2176 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:13,154 INFO L93 Difference]: Finished difference Result 3287 states and 5540 transitions. [2021-11-20 06:51:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:51:13,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 118 [2021-11-20 06:51:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:13,175 INFO L225 Difference]: With dead ends: 3287 [2021-11-20 06:51:13,175 INFO L226 Difference]: Without dead ends: 2282 [2021-11-20 06:51:13,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:51:13,184 INFO L933 BasicCegarLoop]: 1355 mSDtfsCounter, 721 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 4752 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:13,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 4752 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:51:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-11-20 06:51:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2263. [2021-11-20 06:51:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1763 states have (on average 1.6369824163357913) internal successors, (2886), 1844 states have internal predecessors, (2886), 401 states have call successors, (401), 80 states have call predecessors, (401), 98 states have return successors, (472), 400 states have call predecessors, (472), 396 states have call successors, (472) [2021-11-20 06:51:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3759 transitions. [2021-11-20 06:51:13,313 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3759 transitions. Word has length 118 [2021-11-20 06:51:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:13,314 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3759 transitions. [2021-11-20 06:51:13,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3759 transitions. [2021-11-20 06:51:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:51:13,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:13,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:13,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:13,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:51:13,553 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1535898628, now seen corresponding path program 1 times [2021-11-20 06:51:13,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:13,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417943869] [2021-11-20 06:51:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:13,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:51:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:51:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:51:14,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417943869] [2021-11-20 06:51:14,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417943869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201226841] [2021-11-20 06:51:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:14,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:14,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:14,049 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:14,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:51:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:51:14,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:51:14,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:14,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201226841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:14,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:14,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-11-20 06:51:14,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199671855] [2021-11-20 06:51:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:14,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:14,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:51:14,578 INFO L87 Difference]: Start difference. First operand 2263 states and 3759 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:14,737 INFO L93 Difference]: Finished difference Result 4382 states and 7320 transitions. [2021-11-20 06:51:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:51:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-11-20 06:51:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:14,761 INFO L225 Difference]: With dead ends: 4382 [2021-11-20 06:51:14,762 INFO L226 Difference]: Without dead ends: 2317 [2021-11-20 06:51:14,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:14,780 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 39 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:14,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2560 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:51:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-20 06:51:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2284. [2021-11-20 06:51:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1783 states have (on average 1.636567582725743) internal successors, (2918), 1865 states have internal predecessors, (2918), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-11-20 06:51:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3792 transitions. [2021-11-20 06:51:14,929 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3792 transitions. Word has length 120 [2021-11-20 06:51:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:14,929 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 3792 transitions. [2021-11-20 06:51:14,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:51:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3792 transitions. [2021-11-20 06:51:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:51:14,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:14,942 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:14,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:15,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:15,157 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:15,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1928608450, now seen corresponding path program 1 times [2021-11-20 06:51:15,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:15,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353346527] [2021-11-20 06:51:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:15,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:51:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:51:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:15,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353346527] [2021-11-20 06:51:15,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353346527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:15,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130927041] [2021-11-20 06:51:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:15,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:15,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:15,657 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:15,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:51:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:15,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:51:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:51:16,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130927041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:16,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:16,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-20 06:51:16,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963485157] [2021-11-20 06:51:16,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:16,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:51:16,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:51:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:51:16,199 INFO L87 Difference]: Start difference. First operand 2284 states and 3792 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:16,387 INFO L93 Difference]: Finished difference Result 4312 states and 7200 transitions. [2021-11-20 06:51:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:51:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-11-20 06:51:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:16,407 INFO L225 Difference]: With dead ends: 4312 [2021-11-20 06:51:16,407 INFO L226 Difference]: Without dead ends: 2357 [2021-11-20 06:51:16,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:51:16,421 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 175 mSDsluCounter, 5012 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:16,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5864 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-11-20 06:51:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2284. [2021-11-20 06:51:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1783 states have (on average 1.6360067302299495) internal successors, (2917), 1865 states have internal predecessors, (2917), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-11-20 06:51:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3791 transitions. [2021-11-20 06:51:16,529 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3791 transitions. Word has length 121 [2021-11-20 06:51:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:16,530 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 3791 transitions. [2021-11-20 06:51:16,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:51:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3791 transitions. [2021-11-20 06:51:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:51:16,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:16,541 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:16,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:16,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:16,769 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 232815680, now seen corresponding path program 1 times [2021-11-20 06:51:16,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:16,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388622648] [2021-11-20 06:51:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:16,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:16,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:51:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:16,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:51:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:51:17,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:17,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388622648] [2021-11-20 06:51:17,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388622648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:17,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487252974] [2021-11-20 06:51:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:17,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:17,182 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:51:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:51:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:51:17,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:17,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487252974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:17,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:17,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2021-11-20 06:51:17,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723266498] [2021-11-20 06:51:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:17,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:51:17,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:51:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:17,787 INFO L87 Difference]: Start difference. First operand 2284 states and 3791 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:51:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:18,132 INFO L93 Difference]: Finished difference Result 2497 states and 4145 transitions. [2021-11-20 06:51:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:51:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 121 [2021-11-20 06:51:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:18,156 INFO L225 Difference]: With dead ends: 2497 [2021-11-20 06:51:18,156 INFO L226 Difference]: Without dead ends: 2480 [2021-11-20 06:51:18,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:18,160 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 852 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:18,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 1564 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:51:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-11-20 06:51:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2302. [2021-11-20 06:51:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1801 states have (on average 1.6296501943364798) internal successors, (2935), 1883 states have internal predecessors, (2935), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-11-20 06:51:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3809 transitions. [2021-11-20 06:51:18,277 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3809 transitions. Word has length 121 [2021-11-20 06:51:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:18,278 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 3809 transitions. [2021-11-20 06:51:18,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:51:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3809 transitions. [2021-11-20 06:51:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:51:18,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:18,290 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:18,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:51:18,509 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1691028997, now seen corresponding path program 1 times [2021-11-20 06:51:18,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:18,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686019001] [2021-11-20 06:51:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:18,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:51:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:51:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:51:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:51:18,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:18,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686019001] [2021-11-20 06:51:18,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686019001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219501246] [2021-11-20 06:51:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:18,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:18,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:18,956 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:18,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:51:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:51:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:51:19,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:19,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219501246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:19,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:19,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-20 06:51:19,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364584497] [2021-11-20 06:51:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:19,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:51:19,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:51:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:19,427 INFO L87 Difference]: Start difference. First operand 2302 states and 3809 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-20 06:51:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:19,501 INFO L93 Difference]: Finished difference Result 2331 states and 3847 transitions. [2021-11-20 06:51:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:51:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 127 [2021-11-20 06:51:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:19,535 INFO L225 Difference]: With dead ends: 2331 [2021-11-20 06:51:19,535 INFO L226 Difference]: Without dead ends: 2314 [2021-11-20 06:51:19,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:51:19,539 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 37 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:19,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3460 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:51:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-11-20 06:51:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2302. [2021-11-20 06:51:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1801 states have (on average 1.626318711826763) internal successors, (2929), 1883 states have internal predecessors, (2929), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-11-20 06:51:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3803 transitions. [2021-11-20 06:51:19,647 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3803 transitions. Word has length 127 [2021-11-20 06:51:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:19,648 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 3803 transitions. [2021-11-20 06:51:19,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-20 06:51:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3803 transitions. [2021-11-20 06:51:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 06:51:19,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:19,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:19,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:19,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:51:19,877 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1168795695, now seen corresponding path program 1 times [2021-11-20 06:51:19,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:19,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503803157] [2021-11-20 06:51:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:19,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:19,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:51:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:51:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:51:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:51:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:51:20,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:20,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503803157] [2021-11-20 06:51:20,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503803157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:20,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810564844] [2021-11-20 06:51:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:20,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:20,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:20,297 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:20,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:51:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:51:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:51:20,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810564844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:20,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2021-11-20 06:51:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890728894] [2021-11-20 06:51:20,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:20,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:51:20,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:51:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:51:20,853 INFO L87 Difference]: Start difference. First operand 2302 states and 3803 transitions. Second operand has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:51:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:21,032 INFO L93 Difference]: Finished difference Result 4462 states and 7402 transitions. [2021-11-20 06:51:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:51:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 138 [2021-11-20 06:51:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:21,057 INFO L225 Difference]: With dead ends: 4462 [2021-11-20 06:51:21,057 INFO L226 Difference]: Without dead ends: 2385 [2021-11-20 06:51:21,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:21,074 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 167 mSDsluCounter, 4186 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 5048 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:21,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 5048 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-11-20 06:51:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2302. [2021-11-20 06:51:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1801 states have (on average 1.626318711826763) internal successors, (2929), 1883 states have internal predecessors, (2929), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-11-20 06:51:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3803 transitions. [2021-11-20 06:51:21,193 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3803 transitions. Word has length 138 [2021-11-20 06:51:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:21,194 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 3803 transitions. [2021-11-20 06:51:21,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:51:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3803 transitions. [2021-11-20 06:51:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 06:51:21,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:21,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:21,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:21,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:51:21,437 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1825862916, now seen corresponding path program 1 times [2021-11-20 06:51:21,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:21,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325421285] [2021-11-20 06:51:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:21,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:51:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:51:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:51:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:51:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:51:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:51:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:51:21,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325421285] [2021-11-20 06:51:21,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325421285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878912730] [2021-11-20 06:51:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:21,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:21,845 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:21,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:51:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:51:22,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:51:22,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:22,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878912730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:22,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:22,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-20 06:51:22,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92796556] [2021-11-20 06:51:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:22,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:22,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:51:22,424 INFO L87 Difference]: Start difference. First operand 2302 states and 3803 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:22,550 INFO L93 Difference]: Finished difference Result 4466 states and 7408 transitions. [2021-11-20 06:51:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:51:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-11-20 06:51:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:22,569 INFO L225 Difference]: With dead ends: 4466 [2021-11-20 06:51:22,569 INFO L226 Difference]: Without dead ends: 2132 [2021-11-20 06:51:22,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:51:22,580 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 11 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:22,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2586 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:51:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-11-20 06:51:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2132. [2021-11-20 06:51:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 1646 states have (on average 1.6330498177399757) internal successors, (2688), 1722 states have internal predecessors, (2688), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2021-11-20 06:51:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3543 transitions. [2021-11-20 06:51:22,694 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3543 transitions. Word has length 138 [2021-11-20 06:51:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:22,694 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3543 transitions. [2021-11-20 06:51:22,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3543 transitions. [2021-11-20 06:51:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:51:22,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:22,707 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:22,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:22,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:51:22,922 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash -713032652, now seen corresponding path program 1 times [2021-11-20 06:51:22,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:22,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098289174] [2021-11-20 06:51:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:22,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:51:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:51:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:51:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:51:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:51:23,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:23,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098289174] [2021-11-20 06:51:23,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098289174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:23,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609929546] [2021-11-20 06:51:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:23,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:23,309 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:51:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:51:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:51:23,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609929546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:23,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:23,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:51:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202064001] [2021-11-20 06:51:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:23,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:23,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:51:23,913 INFO L87 Difference]: Start difference. First operand 2132 states and 3543 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:24,076 INFO L93 Difference]: Finished difference Result 4233 states and 7052 transitions. [2021-11-20 06:51:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:51:24,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-11-20 06:51:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:24,091 INFO L225 Difference]: With dead ends: 4233 [2021-11-20 06:51:24,091 INFO L226 Difference]: Without dead ends: 2132 [2021-11-20 06:51:24,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:51:24,101 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 176 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:24,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2419 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-11-20 06:51:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2132. [2021-11-20 06:51:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 1646 states have (on average 1.6324422843256379) internal successors, (2687), 1722 states have internal predecessors, (2687), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2021-11-20 06:51:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3542 transitions. [2021-11-20 06:51:24,240 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3542 transitions. Word has length 140 [2021-11-20 06:51:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:24,241 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3542 transitions. [2021-11-20 06:51:24,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3542 transitions. [2021-11-20 06:51:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:51:24,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:24,252 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:24,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:24,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:24,465 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash 696289054, now seen corresponding path program 1 times [2021-11-20 06:51:24,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:24,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121004178] [2021-11-20 06:51:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:24,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:51:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:51:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:51:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:51:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:51:24,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121004178] [2021-11-20 06:51:24,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121004178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:24,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:24,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 06:51:24,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742031892] [2021-11-20 06:51:24,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:25,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:51:25,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:51:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:51:25,002 INFO L87 Difference]: Start difference. First operand 2132 states and 3542 transitions. Second operand has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:51:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:33,887 INFO L93 Difference]: Finished difference Result 5562 states and 9599 transitions. [2021-11-20 06:51:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:51:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2021-11-20 06:51:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:33,908 INFO L225 Difference]: With dead ends: 5562 [2021-11-20 06:51:33,909 INFO L226 Difference]: Without dead ends: 3476 [2021-11-20 06:51:33,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:51:33,919 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 1104 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 7337 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 7654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 7337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:33,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 5591 Invalid, 7654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [317 Valid, 7337 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 06:51:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-11-20 06:51:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2212. [2021-11-20 06:51:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1710 states have (on average 1.6263157894736842) internal successors, (2781), 1786 states have internal predecessors, (2781), 406 states have call successors, (406), 77 states have call predecessors, (406), 95 states have return successors, (486), 408 states have call predecessors, (486), 401 states have call successors, (486) [2021-11-20 06:51:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3673 transitions. [2021-11-20 06:51:34,263 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3673 transitions. Word has length 141 [2021-11-20 06:51:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:34,263 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3673 transitions. [2021-11-20 06:51:34,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:51:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3673 transitions. [2021-11-20 06:51:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 06:51:34,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:34,272 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:34,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 06:51:34,273 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:34,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1967551053, now seen corresponding path program 1 times [2021-11-20 06:51:34,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:34,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437297686] [2021-11-20 06:51:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:34,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:51:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:51:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:51:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:51:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:51:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:51:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:51:34,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:34,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437297686] [2021-11-20 06:51:34,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437297686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:34,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:34,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:51:34,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700150361] [2021-11-20 06:51:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:34,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:51:34,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:51:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:51:34,666 INFO L87 Difference]: Start difference. First operand 2212 states and 3673 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:39,166 INFO L93 Difference]: Finished difference Result 3735 states and 6255 transitions. [2021-11-20 06:51:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:51:39,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 145 [2021-11-20 06:51:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:39,176 INFO L225 Difference]: With dead ends: 3735 [2021-11-20 06:51:39,176 INFO L226 Difference]: Without dead ends: 1537 [2021-11-20 06:51:39,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:51:39,189 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 1761 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1834 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:39,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1834 Valid, 2230 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 06:51:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-20 06:51:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1021. [2021-11-20 06:51:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 809 states have (on average 1.6205191594561186) internal successors, (1311), 842 states have internal predecessors, (1311), 167 states have call successors, (167), 42 states have call predecessors, (167), 44 states have return successors, (179), 161 states have call predecessors, (179), 162 states have call successors, (179) [2021-11-20 06:51:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1657 transitions. [2021-11-20 06:51:39,452 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1657 transitions. Word has length 145 [2021-11-20 06:51:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:39,453 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1657 transitions. [2021-11-20 06:51:39,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1657 transitions. [2021-11-20 06:51:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 06:51:39,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:39,459 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:51:39,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:51:39,459 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1783603339, now seen corresponding path program 1 times [2021-11-20 06:51:39,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019391621] [2021-11-20 06:51:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:39,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:51:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:51:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:51:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:51:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:51:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:51:39,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019391621] [2021-11-20 06:51:39,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019391621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330154690] [2021-11-20 06:51:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:39,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:39,937 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:39,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:51:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:51:40,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:51:40,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:40,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330154690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:40,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:40,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-11-20 06:51:40,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561830190] [2021-11-20 06:51:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:40,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:51:40,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:40,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:51:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:51:40,450 INFO L87 Difference]: Start difference. First operand 1021 states and 1657 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:40,699 INFO L93 Difference]: Finished difference Result 2697 states and 4463 transitions. [2021-11-20 06:51:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:51:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 146 [2021-11-20 06:51:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:40,708 INFO L225 Difference]: With dead ends: 2697 [2021-11-20 06:51:40,708 INFO L226 Difference]: Without dead ends: 1793 [2021-11-20 06:51:40,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:51:40,713 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 786 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:40,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1676 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-11-20 06:51:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1778. [2021-11-20 06:51:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1393 states have (on average 1.6195262024407753) internal successors, (2256), 1451 states have internal predecessors, (2256), 306 states have call successors, (306), 76 states have call predecessors, (306), 78 states have return successors, (339), 299 states have call predecessors, (339), 301 states have call successors, (339) [2021-11-20 06:51:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2901 transitions. [2021-11-20 06:51:41,017 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2901 transitions. Word has length 146 [2021-11-20 06:51:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:41,017 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2901 transitions. [2021-11-20 06:51:41,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:51:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2901 transitions. [2021-11-20 06:51:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:51:41,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:41,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:41,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:41,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:41,237 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:41,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1299618357, now seen corresponding path program 1 times [2021-11-20 06:51:41,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:41,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617452068] [2021-11-20 06:51:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:41,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:51:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:51:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:51:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:51:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:51:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:51:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:51:41,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617452068] [2021-11-20 06:51:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617452068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313140088] [2021-11-20 06:51:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:41,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:41,701 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:41,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:51:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:42,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:51:42,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:51:42,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:42,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313140088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:42,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:42,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2021-11-20 06:51:42,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669690140] [2021-11-20 06:51:42,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:42,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:51:42,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:51:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:51:42,286 INFO L87 Difference]: Start difference. First operand 1778 states and 2901 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:51:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:42,758 INFO L93 Difference]: Finished difference Result 4959 states and 8219 transitions. [2021-11-20 06:51:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:51:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2021-11-20 06:51:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:42,771 INFO L225 Difference]: With dead ends: 4959 [2021-11-20 06:51:42,772 INFO L226 Difference]: Without dead ends: 3311 [2021-11-20 06:51:42,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:51:42,778 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 847 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:42,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1522 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:51:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-11-20 06:51:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 3293. [2021-11-20 06:51:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 2562 states have (on average 1.6311475409836065) internal successors, (4179), 2674 states have internal predecessors, (4179), 584 states have call successors, (584), 144 states have call predecessors, (584), 146 states have return successors, (672), 572 states have call predecessors, (672), 579 states have call successors, (672) [2021-11-20 06:51:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 5435 transitions. [2021-11-20 06:51:43,246 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 5435 transitions. Word has length 151 [2021-11-20 06:51:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 3293 states and 5435 transitions. [2021-11-20 06:51:43,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:51:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 5435 transitions. [2021-11-20 06:51:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:51:43,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:43,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:43,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:43,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 06:51:43,465 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1386233081, now seen corresponding path program 1 times [2021-11-20 06:51:43,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:43,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476633301] [2021-11-20 06:51:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:43,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:51:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:51:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:51:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:51:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:51:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:51:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:51:43,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476633301] [2021-11-20 06:51:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476633301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:43,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:51:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956709988] [2021-11-20 06:51:43,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:51:43,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:51:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:51:43,944 INFO L87 Difference]: Start difference. First operand 3293 states and 5435 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:51:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:50,358 INFO L93 Difference]: Finished difference Result 7173 states and 12279 transitions. [2021-11-20 06:51:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:51:50,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-11-20 06:51:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:50,386 INFO L225 Difference]: With dead ends: 7173 [2021-11-20 06:51:50,386 INFO L226 Difference]: Without dead ends: 4553 [2021-11-20 06:51:50,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:51:50,397 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1308 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:50,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 3287 Invalid, 3920 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [327 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-20 06:51:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-11-20 06:51:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3353. [2021-11-20 06:51:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 2610 states have (on average 1.6245210727969348) internal successors, (4240), 2722 states have internal predecessors, (4240), 594 states have call successors, (594), 144 states have call predecessors, (594), 148 states have return successors, (686), 582 states have call predecessors, (686), 589 states have call successors, (686) [2021-11-20 06:51:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 5520 transitions. [2021-11-20 06:51:50,845 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 5520 transitions. Word has length 154 [2021-11-20 06:51:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:50,845 INFO L470 AbstractCegarLoop]: Abstraction has 3353 states and 5520 transitions. [2021-11-20 06:51:50,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 06:51:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 5520 transitions. [2021-11-20 06:51:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:51:50,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:50,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:50,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:51:50,850 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1901042202, now seen corresponding path program 1 times [2021-11-20 06:51:50,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:50,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809519653] [2021-11-20 06:51:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:50,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:50,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:51:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:51:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:51:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:51:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:51:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:51:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:51:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:51:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:51:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:51:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:51:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:51:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:51:51,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:51,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809519653] [2021-11-20 06:51:51,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809519653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:51,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:51,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:51:51,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972286316] [2021-11-20 06:51:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:51,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:51:51,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:51:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:51:51,330 INFO L87 Difference]: Start difference. First operand 3353 states and 5520 transitions. Second operand has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:52:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:03,468 INFO L93 Difference]: Finished difference Result 8934 states and 15733 transitions. [2021-11-20 06:52:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:52:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-11-20 06:52:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:03,511 INFO L225 Difference]: With dead ends: 8934 [2021-11-20 06:52:03,512 INFO L226 Difference]: Without dead ends: 6387 [2021-11-20 06:52:03,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:52:03,526 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 3577 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 6566 mSolverCounterSat, 1305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3639 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 7871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1305 IncrementalHoareTripleChecker+Valid, 6566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:03,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3639 Valid, 4397 Invalid, 7871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1305 Valid, 6566 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 06:52:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2021-11-20 06:52:04,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 4430. [2021-11-20 06:52:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 3444 states have (on average 1.613240418118467) internal successors, (5556), 3601 states have internal predecessors, (5556), 767 states have call successors, (767), 191 states have call predecessors, (767), 218 states have return successors, (971), 757 states have call predecessors, (971), 762 states have call successors, (971) [2021-11-20 06:52:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 7294 transitions. [2021-11-20 06:52:04,264 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 7294 transitions. Word has length 156 [2021-11-20 06:52:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:04,265 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 7294 transitions. [2021-11-20 06:52:04,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:52:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 7294 transitions. [2021-11-20 06:52:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 06:52:04,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:04,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:04,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 06:52:04,271 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:04,271 INFO L85 PathProgramCache]: Analyzing trace with hash 395869325, now seen corresponding path program 1 times [2021-11-20 06:52:04,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:04,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289975279] [2021-11-20 06:52:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:04,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:52:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:52:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:52:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:52:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:52:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:52:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:52:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:52:04,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:04,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289975279] [2021-11-20 06:52:04,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289975279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:04,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399350364] [2021-11-20 06:52:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:04,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:04,707 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:04,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:52:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1912 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:52:05,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:52:05,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:52:05,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399350364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:05,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:52:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:52:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138423141] [2021-11-20 06:52:05,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:52:05,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:52:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:52:05,291 INFO L87 Difference]: Start difference. First operand 4430 states and 7294 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:52:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:05,896 INFO L93 Difference]: Finished difference Result 8792 states and 14710 transitions. [2021-11-20 06:52:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:52:05,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 158 [2021-11-20 06:52:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:05,920 INFO L225 Difference]: With dead ends: 8792 [2021-11-20 06:52:05,921 INFO L226 Difference]: Without dead ends: 4480 [2021-11-20 06:52:05,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:52:05,935 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 22 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:05,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2431 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:52:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-11-20 06:52:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 4480. [2021-11-20 06:52:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 3484 states have (on average 1.6030424799081515) internal successors, (5585), 3646 states have internal predecessors, (5585), 767 states have call successors, (767), 196 states have call predecessors, (767), 228 states have return successors, (981), 757 states have call predecessors, (981), 762 states have call successors, (981) [2021-11-20 06:52:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 7333 transitions. [2021-11-20 06:52:06,638 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 7333 transitions. Word has length 158 [2021-11-20 06:52:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:06,639 INFO L470 AbstractCegarLoop]: Abstraction has 4480 states and 7333 transitions. [2021-11-20 06:52:06,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:52:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 7333 transitions. [2021-11-20 06:52:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:52:06,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:06,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:06,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:06,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:06,861 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1301134056, now seen corresponding path program 1 times [2021-11-20 06:52:06,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:06,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750867986] [2021-11-20 06:52:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:06,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:52:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:52:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:52:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:52:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:52:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:52:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:52:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:52:07,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:07,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750867986] [2021-11-20 06:52:07,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750867986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:07,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:52:07,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:52:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188978149] [2021-11-20 06:52:07,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:07,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:52:07,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:52:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:52:07,403 INFO L87 Difference]: Start difference. First operand 4480 states and 7333 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:52:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:18,905 INFO L93 Difference]: Finished difference Result 10174 states and 17317 transitions. [2021-11-20 06:52:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:52:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 159 [2021-11-20 06:52:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:18,939 INFO L225 Difference]: With dead ends: 10174 [2021-11-20 06:52:18,939 INFO L226 Difference]: Without dead ends: 6504 [2021-11-20 06:52:18,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:52:18,953 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 3495 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 5763 mSolverCounterSat, 1195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3555 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 6958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1195 IncrementalHoareTripleChecker+Valid, 5763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:18,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3555 Valid, 3371 Invalid, 6958 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1195 Valid, 5763 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-20 06:52:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2021-11-20 06:52:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 4841. [2021-11-20 06:52:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 3777 states have (on average 1.583267143235372) internal successors, (5980), 3938 states have internal predecessors, (5980), 806 states have call successors, (806), 229 states have call predecessors, (806), 257 states have return successors, (1039), 793 states have call predecessors, (1039), 801 states have call successors, (1039) [2021-11-20 06:52:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 7825 transitions. [2021-11-20 06:52:19,962 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 7825 transitions. Word has length 159 [2021-11-20 06:52:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:19,963 INFO L470 AbstractCegarLoop]: Abstraction has 4841 states and 7825 transitions. [2021-11-20 06:52:19,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:52:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 7825 transitions. [2021-11-20 06:52:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:52:19,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:19,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:19,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 06:52:19,970 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash -241428561, now seen corresponding path program 1 times [2021-11-20 06:52:19,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:19,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825806148] [2021-11-20 06:52:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:19,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:52:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:52:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:52:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:52:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:52:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:52:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:52:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:52:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:52:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:52:20,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825806148] [2021-11-20 06:52:20,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825806148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15272872] [2021-11-20 06:52:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:20,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:20,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:20,414 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:20,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:52:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:52:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:52:20,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:52:20,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15272872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:20,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:52:20,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2021-11-20 06:52:20,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076858096] [2021-11-20 06:52:20,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:20,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:52:20,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:52:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:52:20,943 INFO L87 Difference]: Start difference. First operand 4841 states and 7825 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:52:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:21,892 INFO L93 Difference]: Finished difference Result 10987 states and 17849 transitions. [2021-11-20 06:52:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:52:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 166 [2021-11-20 06:52:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:21,934 INFO L225 Difference]: With dead ends: 10987 [2021-11-20 06:52:21,934 INFO L226 Difference]: Without dead ends: 6965 [2021-11-20 06:52:21,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:52:21,948 INFO L933 BasicCegarLoop]: 1456 mSDtfsCounter, 733 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:21,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 2300 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:52:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6965 states. [2021-11-20 06:52:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6965 to 6873. [2021-11-20 06:52:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6873 states, 5372 states have (on average 1.5817200297840655) internal successors, (8497), 5599 states have internal predecessors, (8497), 1131 states have call successors, (1131), 319 states have call predecessors, (1131), 369 states have return successors, (1474), 1122 states have call predecessors, (1474), 1126 states have call successors, (1474) [2021-11-20 06:52:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6873 states to 6873 states and 11102 transitions. [2021-11-20 06:52:22,900 INFO L78 Accepts]: Start accepts. Automaton has 6873 states and 11102 transitions. Word has length 166 [2021-11-20 06:52:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:22,900 INFO L470 AbstractCegarLoop]: Abstraction has 6873 states and 11102 transitions. [2021-11-20 06:52:22,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:52:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6873 states and 11102 transitions. [2021-11-20 06:52:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 06:52:22,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:22,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:22,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:52:23,104 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 135822858, now seen corresponding path program 1 times [2021-11-20 06:52:23,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108479312] [2021-11-20 06:52:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:23,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:52:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:52:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:52:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:52:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:52:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:52:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:52:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:52:23,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:23,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108479312] [2021-11-20 06:52:23,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108479312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439115390] [2021-11-20 06:52:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:23,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:23,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:23,610 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:23,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:52:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:52:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:52:24,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:52:24,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439115390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:24,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:52:24,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-11-20 06:52:24,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757780903] [2021-11-20 06:52:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:24,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:52:24,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:52:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:52:24,173 INFO L87 Difference]: Start difference. First operand 6873 states and 11102 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 06:52:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:25,202 INFO L93 Difference]: Finished difference Result 7228 states and 11687 transitions. [2021-11-20 06:52:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:52:25,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 164 [2021-11-20 06:52:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:25,242 INFO L225 Difference]: With dead ends: 7228 [2021-11-20 06:52:25,242 INFO L226 Difference]: Without dead ends: 7213 [2021-11-20 06:52:25,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:52:25,249 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 67 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:25,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 3492 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:52:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-11-20 06:52:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6915. [2021-11-20 06:52:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6915 states, 5414 states have (on average 1.5772072404876247) internal successors, (8539), 5641 states have internal predecessors, (8539), 1131 states have call successors, (1131), 319 states have call predecessors, (1131), 369 states have return successors, (1474), 1122 states have call predecessors, (1474), 1126 states have call successors, (1474) [2021-11-20 06:52:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 11144 transitions. [2021-11-20 06:52:26,238 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 11144 transitions. Word has length 164 [2021-11-20 06:52:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:26,238 INFO L470 AbstractCegarLoop]: Abstraction has 6915 states and 11144 transitions. [2021-11-20 06:52:26,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 06:52:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 11144 transitions. [2021-11-20 06:52:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-20 06:52:26,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:26,244 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:26,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:26,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 06:52:26,457 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:26,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1931923964, now seen corresponding path program 1 times [2021-11-20 06:52:26,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:26,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863800285] [2021-11-20 06:52:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:26,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:52:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:52:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:52:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:52:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:52:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:52:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:26,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:52:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:52:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:52:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:52:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:52:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:52:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:52:27,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863800285] [2021-11-20 06:52:27,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863800285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523631338] [2021-11-20 06:52:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:27,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:27,045 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:27,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 06:52:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:52:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:52:27,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 06:52:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523631338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:28,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:52:28,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 25 [2021-11-20 06:52:28,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821344807] [2021-11-20 06:52:28,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:28,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:52:28,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:52:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:52:28,885 INFO L87 Difference]: Start difference. First operand 6915 states and 11144 transitions. Second operand has 25 states, 25 states have (on average 11.32) internal successors, (283), 18 states have internal predecessors, (283), 9 states have call successors, (51), 8 states have call predecessors, (51), 14 states have return successors, (50), 14 states have call predecessors, (50), 9 states have call successors, (50) [2021-11-20 06:53:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:13,875 INFO L93 Difference]: Finished difference Result 42006 states and 76909 transitions. [2021-11-20 06:53:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-20 06:53:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 11.32) internal successors, (283), 18 states have internal predecessors, (283), 9 states have call successors, (51), 8 states have call predecessors, (51), 14 states have return successors, (50), 14 states have call predecessors, (50), 9 states have call successors, (50) Word has length 201 [2021-11-20 06:53:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:14,354 INFO L225 Difference]: With dead ends: 42006 [2021-11-20 06:53:14,354 INFO L226 Difference]: Without dead ends: 35197 [2021-11-20 06:53:14,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 444 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4043 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1768, Invalid=10888, Unknown=0, NotChecked=0, Total=12656 [2021-11-20 06:53:14,401 INFO L933 BasicCegarLoop]: 2509 mSDtfsCounter, 7058 mSDsluCounter, 13799 mSDsCounter, 0 mSdLazyCounter, 34925 mSolverCounterSat, 4013 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7072 SdHoareTripleChecker+Valid, 16308 SdHoareTripleChecker+Invalid, 38938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4013 IncrementalHoareTripleChecker+Valid, 34925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:14,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7072 Valid, 16308 Invalid, 38938 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4013 Valid, 34925 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2021-11-20 06:53:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35197 states. [2021-11-20 06:53:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35197 to 23307. [2021-11-20 06:53:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23307 states, 17750 states have (on average 1.56) internal successors, (27690), 18595 states have internal predecessors, (27690), 4311 states have call successors, (4311), 913 states have call predecessors, (4311), 1245 states have return successors, (6692), 4408 states have call predecessors, (6692), 4306 states have call successors, (6692) [2021-11-20 06:53:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23307 states to 23307 states and 38693 transitions. [2021-11-20 06:53:19,180 INFO L78 Accepts]: Start accepts. Automaton has 23307 states and 38693 transitions. Word has length 201 [2021-11-20 06:53:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 23307 states and 38693 transitions. [2021-11-20 06:53:19,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.32) internal successors, (283), 18 states have internal predecessors, (283), 9 states have call successors, (51), 8 states have call predecessors, (51), 14 states have return successors, (50), 14 states have call predecessors, (50), 9 states have call successors, (50) [2021-11-20 06:53:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23307 states and 38693 transitions. [2021-11-20 06:53:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-20 06:53:19,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:19,212 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:19,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-20 06:53:19,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 06:53:19,429 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:19,429 INFO L85 PathProgramCache]: Analyzing trace with hash 698119847, now seen corresponding path program 1 times [2021-11-20 06:53:19,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:19,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884442169] [2021-11-20 06:53:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:19,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:53:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:53:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:53:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:53:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:53:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:53:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:53:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:53:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:53:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:53:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 06:53:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-20 06:53:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:53:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-20 06:53:19,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:19,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884442169] [2021-11-20 06:53:19,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884442169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:19,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251529098] [2021-11-20 06:53:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:19,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:19,881 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:19,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 06:53:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:20,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:53:20,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:53:20,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:20,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251529098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:20,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:20,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:53:20,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415032191] [2021-11-20 06:53:20,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:20,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:20,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:53:20,516 INFO L87 Difference]: Start difference. First operand 23307 states and 38693 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 06:53:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:24,775 INFO L93 Difference]: Finished difference Result 47118 states and 78803 transitions. [2021-11-20 06:53:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:24,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 202 [2021-11-20 06:53:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:24,972 INFO L225 Difference]: With dead ends: 47118 [2021-11-20 06:53:24,973 INFO L226 Difference]: Without dead ends: 23995 [2021-11-20 06:53:25,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:53:25,123 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 17 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:25,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2432 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:53:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23995 states. [2021-11-20 06:53:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23995 to 23947. [2021-11-20 06:53:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23947 states, 18292 states have (on average 1.5563087688607042) internal successors, (28468), 19161 states have internal predecessors, (28468), 4311 states have call successors, (4311), 987 states have call predecessors, (4311), 1343 states have return successors, (6579), 4408 states have call predecessors, (6579), 4306 states have call successors, (6579) [2021-11-20 06:53:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23947 states to 23947 states and 39358 transitions. [2021-11-20 06:53:29,236 INFO L78 Accepts]: Start accepts. Automaton has 23947 states and 39358 transitions. Word has length 202 [2021-11-20 06:53:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:29,237 INFO L470 AbstractCegarLoop]: Abstraction has 23947 states and 39358 transitions. [2021-11-20 06:53:29,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 06:53:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23947 states and 39358 transitions. [2021-11-20 06:53:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 06:53:29,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:29,268 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:29,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:29,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:53:29,468 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1706044399, now seen corresponding path program 1 times [2021-11-20 06:53:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:29,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890911653] [2021-11-20 06:53:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:29,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:53:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:53:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:53:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:53:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:53:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:53:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:53:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:53:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:53:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:53:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:53:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:53:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:53:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:53:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:53:29,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:29,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890911653] [2021-11-20 06:53:29,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890911653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:29,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308802070] [2021-11-20 06:53:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:29,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:29,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:29,897 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:29,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 06:53:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:53:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:53:30,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:30,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308802070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:30,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:30,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:53:30,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463060077] [2021-11-20 06:53:30,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:30,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:30,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:53:30,625 INFO L87 Difference]: Start difference. First operand 23947 states and 39358 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:53:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:34,235 INFO L93 Difference]: Finished difference Result 38613 states and 63325 transitions. [2021-11-20 06:53:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 205 [2021-11-20 06:53:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:34,359 INFO L225 Difference]: With dead ends: 38613 [2021-11-20 06:53:34,359 INFO L226 Difference]: Without dead ends: 24004 [2021-11-20 06:53:34,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:53:34,408 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 85 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:34,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2470 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24004 states. [2021-11-20 06:53:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24004 to 23944. [2021-11-20 06:53:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23944 states, 18289 states have (on average 1.5563453441959647) internal successors, (28464), 19158 states have internal predecessors, (28464), 4311 states have call successors, (4311), 987 states have call predecessors, (4311), 1343 states have return successors, (6579), 4408 states have call predecessors, (6579), 4306 states have call successors, (6579) [2021-11-20 06:53:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23944 states to 23944 states and 39354 transitions. [2021-11-20 06:53:38,178 INFO L78 Accepts]: Start accepts. Automaton has 23944 states and 39354 transitions. Word has length 205 [2021-11-20 06:53:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:38,179 INFO L470 AbstractCegarLoop]: Abstraction has 23944 states and 39354 transitions. [2021-11-20 06:53:38,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:53:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 23944 states and 39354 transitions. [2021-11-20 06:53:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 06:53:38,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:38,207 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:38,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-20 06:53:38,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:38,408 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash 208159429, now seen corresponding path program 1 times [2021-11-20 06:53:38,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:38,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397731930] [2021-11-20 06:53:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:38,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:53:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:53:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:53:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:53:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:53:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:53:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:53:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:53:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:53:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:53:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:53:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:53:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:53:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:53:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 06:53:38,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:38,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397731930] [2021-11-20 06:53:38,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397731930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:38,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560792676] [2021-11-20 06:53:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:38,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:38,881 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:38,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b36d24-f32e-4cbf-bfb5-caf0cfc6062a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 06:53:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:53:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:53:39,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:39,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560792676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:39,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:39,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:53:39,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128098843] [2021-11-20 06:53:39,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:39,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:39,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:53:39,493 INFO L87 Difference]: Start difference. First operand 23944 states and 39354 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:53:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:43,101 INFO L93 Difference]: Finished difference Result 47993 states and 79825 transitions. [2021-11-20 06:53:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 206 [2021-11-20 06:53:43,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:43,326 INFO L225 Difference]: With dead ends: 47993 [2021-11-20 06:53:43,327 INFO L226 Difference]: Without dead ends: 24064 [2021-11-20 06:53:43,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:53:43,408 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 20 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:43,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2428 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:53:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24064 states.