./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:09:17,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:09:17,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:09:17,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:09:17,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:09:17,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:09:17,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:09:17,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:09:17,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:09:17,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:09:17,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:09:17,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:09:17,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:09:17,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:09:17,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:09:17,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:09:17,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:09:17,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:09:17,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:09:17,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:09:17,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:09:17,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:09:17,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:09:17,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:09:17,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:09:17,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:09:17,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:09:17,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:09:17,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:09:17,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:09:17,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:09:17,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:09:17,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:09:17,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:09:17,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:09:17,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:09:17,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:09:17,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:09:17,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:09:17,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:09:17,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:09:17,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 21:09:17,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:09:17,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:09:17,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:09:17,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:09:17,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:09:17,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:09:17,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:09:17,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:09:17,760 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:09:17,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:09:17,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:09:17,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:09:17,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:09:17,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:09:17,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:09:17,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:09:17,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:09:17,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:09:17,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:09:17,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:09:17,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:09:17,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:09:17,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:09:17,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:09:17,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:09:17,789 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_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-12-06 21:09:17,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:09:17,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:09:17,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:09:17,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:09:17,980 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:09:17,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-12-06 21:09:18,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/data/5d156d317/fe9c92b9e3c3455c91cc8153125d9d8e/FLAGdd29d4ec7 [2021-12-06 21:09:18,594 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:09:18,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-12-06 21:09:18,619 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/data/5d156d317/fe9c92b9e3c3455c91cc8153125d9d8e/FLAGdd29d4ec7 [2021-12-06 21:09:19,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/data/5d156d317/fe9c92b9e3c3455c91cc8153125d9d8e [2021-12-06 21:09:19,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:09:19,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:09:19,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:09:19,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:09:19,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:09:19,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:09:19" (1/1) ... [2021-12-06 21:09:19,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4601a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:19, skipping insertion in model container [2021-12-06 21:09:19,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:09:19" (1/1) ... [2021-12-06 21:09:19,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:09:19,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:09:20,729 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_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-12-06 21:09:20,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:09:20,829 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:09:21,120 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_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-12-06 21:09:21,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:09:21,217 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:09:21,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21 WrapperNode [2021-12-06 21:09:21,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:09:21,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:09:21,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:09:21,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:09:21,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,459 INFO L137 Inliner]: procedures = 373, calls = 2971, calls flagged for inlining = 172, calls inlined = 164, statements flattened = 5915 [2021-12-06 21:09:21,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:09:21,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:09:21,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:09:21,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:09:21,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:09:21,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:09:21,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:09:21,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:09:21,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (1/1) ... [2021-12-06 21:09:21,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:09:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:21,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:09:21,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:09:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2021-12-06 21:09:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2021-12-06 21:09:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2021-12-06 21:09:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2021-12-06 21:09:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2021-12-06 21:09:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2021-12-06 21:09:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-12-06 21:09:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-12-06 21:09:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-12-06 21:09:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2021-12-06 21:09:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-12-06 21:09:21,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2021-12-06 21:09:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-06 21:09:21,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_get_by_index [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_get_by_index [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-12-06 21:09:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-12-06 21:09:21,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-12-06 21:09:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2021-12-06 21:09:21,720 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value_probe [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value_probe [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-12-06 21:09:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-12-06 21:09:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-06 21:09:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-12-06 21:09:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2021-12-06 21:09:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-06 21:09:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-06 21:09:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-12-06 21:09:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-12-06 21:09:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-12-06 21:09:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2021-12-06 21:09:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2021-12-06 21:09:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2021-12-06 21:09:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-06 21:09:21,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-06 21:09:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-12-06 21:09:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 21:09:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2021-12-06 21:09:21,727 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:09:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_table_lock [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_table_lock [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_table_lock [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_table_lock [2021-12-06 21:09:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-06 21:09:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2021-12-06 21:09:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2021-12-06 21:09:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-06 21:09:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-06 21:09:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:09:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-12-06 21:09:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-12-06 21:09:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:09:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:09:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-12-06 21:09:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-12-06 21:09:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-12-06 21:09:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-12-06 21:09:22,184 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:09:22,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:09:28,799 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:09:28,817 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:09:28,818 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 21:09:28,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:09:28 BoogieIcfgContainer [2021-12-06 21:09:28,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:09:28,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:09:28,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:09:28,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:09:28,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:09:19" (1/3) ... [2021-12-06 21:09:28,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c06dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:09:28, skipping insertion in model container [2021-12-06 21:09:28,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:09:21" (2/3) ... [2021-12-06 21:09:28,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c06dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:09:28, skipping insertion in model container [2021-12-06 21:09:28,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:09:28" (3/3) ... [2021-12-06 21:09:28,827 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-12-06 21:09:28,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:09:28,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:09:28,874 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:09:28,879 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:09:28,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:09:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 1845 states, 1279 states have (on average 1.3096168881939014) internal successors, (1675), 1313 states have internal predecessors, (1675), 452 states have call successors, (452), 112 states have call predecessors, (452), 112 states have return successors, (452), 438 states have call predecessors, (452), 452 states have call successors, (452) [2021-12-06 21:09:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:09:28,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:28,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:28,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1524047706, now seen corresponding path program 1 times [2021-12-06 21:09:28,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909707250] [2021-12-06 21:09:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:28,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:29,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:09:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:09:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:29,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:09:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:29,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:09:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:29,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:29,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909707250] [2021-12-06 21:09:29,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909707250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:29,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:29,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:09:29,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209549818] [2021-12-06 21:09:29,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:29,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:09:29,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:09:29,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:29,464 INFO L87 Difference]: Start difference. First operand has 1845 states, 1279 states have (on average 1.3096168881939014) internal successors, (1675), 1313 states have internal predecessors, (1675), 452 states have call successors, (452), 112 states have call predecessors, (452), 112 states have return successors, (452), 438 states have call predecessors, (452), 452 states have call successors, (452) Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:38,258 INFO L93 Difference]: Finished difference Result 5926 states and 8748 transitions. [2021-12-06 21:09:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:09:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-12-06 21:09:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:38,305 INFO L225 Difference]: With dead ends: 5926 [2021-12-06 21:09:38,305 INFO L226 Difference]: Without dead ends: 4084 [2021-12-06 21:09:38,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:09:38,326 INFO L933 BasicCegarLoop]: 2515 mSDtfsCounter, 5447 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 5012 mSolverCounterSat, 3195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5768 SdHoareTripleChecker+Valid, 4267 SdHoareTripleChecker+Invalid, 8207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3195 IncrementalHoareTripleChecker+Valid, 5012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:38,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5768 Valid, 4267 Invalid, 8207 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3195 Valid, 5012 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-12-06 21:09:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2021-12-06 21:09:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 3549. [2021-12-06 21:09:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 2469 states have (on average 1.296881328473066) internal successors, (3202), 2526 states have internal predecessors, (3202), 839 states have call successors, (839), 220 states have call predecessors, (839), 240 states have return successors, (942), 821 states have call predecessors, (942), 823 states have call successors, (942) [2021-12-06 21:09:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 4983 transitions. [2021-12-06 21:09:38,620 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 4983 transitions. Word has length 32 [2021-12-06 21:09:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:38,621 INFO L470 AbstractCegarLoop]: Abstraction has 3549 states and 4983 transitions. [2021-12-06 21:09:38,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 4983 transitions. [2021-12-06 21:09:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 21:09:38,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:38,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:38,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:09:38,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:38,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1075164, now seen corresponding path program 1 times [2021-12-06 21:09:38,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:38,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075927915] [2021-12-06 21:09:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:38,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:38,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:09:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:09:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:38,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:09:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:09:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:38,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:38,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075927915] [2021-12-06 21:09:38,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075927915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:38,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:38,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:09:38,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601589818] [2021-12-06 21:09:38,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:38,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:09:38,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:09:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:38,833 INFO L87 Difference]: Start difference. First operand 3549 states and 4983 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:44,071 INFO L93 Difference]: Finished difference Result 4152 states and 5960 transitions. [2021-12-06 21:09:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:09:44,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-12-06 21:09:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:44,094 INFO L225 Difference]: With dead ends: 4152 [2021-12-06 21:09:44,094 INFO L226 Difference]: Without dead ends: 4149 [2021-12-06 21:09:44,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:09:44,097 INFO L933 BasicCegarLoop]: 2110 mSDtfsCounter, 3971 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 2114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4198 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 4573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2114 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:44,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4198 Valid, 3022 Invalid, 4573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2114 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-06 21:09:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-12-06 21:09:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3548. [2021-12-06 21:09:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 2469 states have (on average 1.2964763061968407) internal successors, (3201), 2525 states have internal predecessors, (3201), 838 states have call successors, (838), 220 states have call predecessors, (838), 240 states have return successors, (942), 821 states have call predecessors, (942), 823 states have call successors, (942) [2021-12-06 21:09:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 4981 transitions. [2021-12-06 21:09:44,257 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 4981 transitions. Word has length 33 [2021-12-06 21:09:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:44,258 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 4981 transitions. [2021-12-06 21:09:44,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 4981 transitions. [2021-12-06 21:09:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 21:09:44,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:44,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:44,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:09:44,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash -35239011, now seen corresponding path program 1 times [2021-12-06 21:09:44,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:44,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201255061] [2021-12-06 21:09:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:44,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:44,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:09:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:44,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:09:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:09:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:44,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:09:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:44,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:44,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201255061] [2021-12-06 21:09:44,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201255061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:44,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:44,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:09:44,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499864490] [2021-12-06 21:09:44,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:44,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:09:44,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:09:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:44,466 INFO L87 Difference]: Start difference. First operand 3548 states and 4981 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:49,410 INFO L93 Difference]: Finished difference Result 4151 states and 5958 transitions. [2021-12-06 21:09:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:09:49,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-12-06 21:09:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:49,433 INFO L225 Difference]: With dead ends: 4151 [2021-12-06 21:09:49,433 INFO L226 Difference]: Without dead ends: 4148 [2021-12-06 21:09:49,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:09:49,440 INFO L933 BasicCegarLoop]: 2111 mSDtfsCounter, 3971 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 2112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4201 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 4571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2112 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:49,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4201 Valid, 3024 Invalid, 4571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2112 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 21:09:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-12-06 21:09:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3547. [2021-12-06 21:09:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 2469 states have (on average 1.2960712839206157) internal successors, (3200), 2524 states have internal predecessors, (3200), 837 states have call successors, (837), 220 states have call predecessors, (837), 240 states have return successors, (942), 821 states have call predecessors, (942), 823 states have call successors, (942) [2021-12-06 21:09:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 4979 transitions. [2021-12-06 21:09:49,613 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 4979 transitions. Word has length 34 [2021-12-06 21:09:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:49,614 INFO L470 AbstractCegarLoop]: Abstraction has 3547 states and 4979 transitions. [2021-12-06 21:09:49,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 4979 transitions. [2021-12-06 21:09:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 21:09:49,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:49,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:49,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:09:49,615 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1094313401, now seen corresponding path program 1 times [2021-12-06 21:09:49,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:49,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842941131] [2021-12-06 21:09:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:49,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:49,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:09:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:49,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:09:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:49,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:09:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:09:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:49,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842941131] [2021-12-06 21:09:49,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842941131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:49,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:49,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:09:49,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457327313] [2021-12-06 21:09:49,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:49,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:09:49,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:09:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:49,781 INFO L87 Difference]: Start difference. First operand 3547 states and 4979 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:54,696 INFO L93 Difference]: Finished difference Result 4288 states and 6099 transitions. [2021-12-06 21:09:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:09:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-06 21:09:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:54,718 INFO L225 Difference]: With dead ends: 4288 [2021-12-06 21:09:54,718 INFO L226 Difference]: Without dead ends: 4269 [2021-12-06 21:09:54,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:09:54,721 INFO L933 BasicCegarLoop]: 2169 mSDtfsCounter, 3879 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 2102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 4710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2102 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:54,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 3181 Invalid, 4710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2102 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 21:09:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-12-06 21:09:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3660. [2021-12-06 21:09:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3660 states, 2557 states have (on average 1.2901838091513493) internal successors, (3299), 2609 states have internal predecessors, (3299), 840 states have call successors, (840), 242 states have call predecessors, (840), 262 states have return successors, (948), 827 states have call predecessors, (948), 829 states have call successors, (948) [2021-12-06 21:09:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3660 states to 3660 states and 5087 transitions. [2021-12-06 21:09:54,902 INFO L78 Accepts]: Start accepts. Automaton has 3660 states and 5087 transitions. Word has length 35 [2021-12-06 21:09:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:54,902 INFO L470 AbstractCegarLoop]: Abstraction has 3660 states and 5087 transitions. [2021-12-06 21:09:54,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:09:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3660 states and 5087 transitions. [2021-12-06 21:09:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 21:09:54,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:54,908 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:09:54,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:09:54,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 515000665, now seen corresponding path program 1 times [2021-12-06 21:09:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183350363] [2021-12-06 21:09:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:54,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:09:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:09:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:09:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:09:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 21:09:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 21:09:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 21:09:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:09:55,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:55,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183350363] [2021-12-06 21:09:55,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183350363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:55,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:55,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:09:55,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024189478] [2021-12-06 21:09:55,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:55,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:09:55,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:09:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:09:55,096 INFO L87 Difference]: Start difference. First operand 3660 states and 5087 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:10:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:01,812 INFO L93 Difference]: Finished difference Result 8494 states and 12125 transitions. [2021-12-06 21:10:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:10:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-12-06 21:10:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:01,837 INFO L225 Difference]: With dead ends: 8494 [2021-12-06 21:10:01,837 INFO L226 Difference]: Without dead ends: 4992 [2021-12-06 21:10:01,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:01,851 INFO L933 BasicCegarLoop]: 2300 mSDtfsCounter, 3252 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 5114 mSolverCounterSat, 2427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 6514 SdHoareTripleChecker+Invalid, 7541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2427 IncrementalHoareTripleChecker+Valid, 5114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:01,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3482 Valid, 6514 Invalid, 7541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2427 Valid, 5114 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-06 21:10:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-12-06 21:10:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 4284. [2021-12-06 21:10:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 3032 states have (on average 1.3007915567282322) internal successors, (3944), 3075 states have internal predecessors, (3944), 975 states have call successors, (975), 242 states have call predecessors, (975), 276 states have return successors, (1133), 985 states have call predecessors, (1133), 964 states have call successors, (1133) [2021-12-06 21:10:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 6052 transitions. [2021-12-06 21:10:02,047 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 6052 transitions. Word has length 58 [2021-12-06 21:10:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:02,047 INFO L470 AbstractCegarLoop]: Abstraction has 4284 states and 6052 transitions. [2021-12-06 21:10:02,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:10:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 6052 transitions. [2021-12-06 21:10:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 21:10:02,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:02,052 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:02,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:10:02,052 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1001937349, now seen corresponding path program 1 times [2021-12-06 21:10:02,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:02,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990800265] [2021-12-06 21:10:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:02,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 21:10:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 21:10:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 21:10:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 21:10:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:02,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:02,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990800265] [2021-12-06 21:10:02,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990800265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:02,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:02,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:10:02,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852952709] [2021-12-06 21:10:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:02,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:02,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:02,248 INFO L87 Difference]: Start difference. First operand 4284 states and 6052 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:10:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,263 INFO L93 Difference]: Finished difference Result 9259 states and 13286 transitions. [2021-12-06 21:10:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:10:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2021-12-06 21:10:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,292 INFO L225 Difference]: With dead ends: 9259 [2021-12-06 21:10:08,293 INFO L226 Difference]: Without dead ends: 4994 [2021-12-06 21:10:08,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:08,313 INFO L933 BasicCegarLoop]: 2299 mSDtfsCounter, 2235 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 4225 mSolverCounterSat, 1560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2465 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 5785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1560 IncrementalHoareTripleChecker+Valid, 4225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2465 Valid, 5416 Invalid, 5785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1560 Valid, 4225 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 21:10:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2021-12-06 21:10:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4285. [2021-12-06 21:10:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 3033 states have (on average 1.3006923837784372) internal successors, (3945), 3076 states have internal predecessors, (3945), 975 states have call successors, (975), 242 states have call predecessors, (975), 276 states have return successors, (1133), 985 states have call predecessors, (1133), 964 states have call successors, (1133) [2021-12-06 21:10:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 6053 transitions. [2021-12-06 21:10:08,506 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 6053 transitions. Word has length 67 [2021-12-06 21:10:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 4285 states and 6053 transitions. [2021-12-06 21:10:08,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:10:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 6053 transitions. [2021-12-06 21:10:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 21:10:08,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,508 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:10:08,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:10:08,509 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1602163945, now seen corresponding path program 1 times [2021-12-06 21:10:08,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568602713] [2021-12-06 21:10:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 21:10:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 21:10:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 21:10:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 21:10:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:08,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568602713] [2021-12-06 21:10:08,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568602713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465067558] [2021-12-06 21:10:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:08,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:10:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 3049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:10:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:09,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:09,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465067558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:09,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:09,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-06 21:10:09,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423843938] [2021-12-06 21:10:09,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:09,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:10:09,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:10:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:09,354 INFO L87 Difference]: Start difference. First operand 4285 states and 6053 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:10:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:16,335 INFO L93 Difference]: Finished difference Result 9264 states and 13293 transitions. [2021-12-06 21:10:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:10:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2021-12-06 21:10:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:16,352 INFO L225 Difference]: With dead ends: 9264 [2021-12-06 21:10:16,352 INFO L226 Difference]: Without dead ends: 4999 [2021-12-06 21:10:16,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:10:16,365 INFO L933 BasicCegarLoop]: 2297 mSDtfsCounter, 2239 mSDsluCounter, 4476 mSDsCounter, 0 mSdLazyCounter, 5615 mSolverCounterSat, 1563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2465 SdHoareTripleChecker+Valid, 6773 SdHoareTripleChecker+Invalid, 7178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1563 IncrementalHoareTripleChecker+Valid, 5615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:16,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2465 Valid, 6773 Invalid, 7178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1563 Valid, 5615 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-12-06 21:10:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-12-06 21:10:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4291. [2021-12-06 21:10:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 3039 states have (on average 1.3000987166831195) internal successors, (3951), 3082 states have internal predecessors, (3951), 975 states have call successors, (975), 242 states have call predecessors, (975), 276 states have return successors, (1133), 985 states have call predecessors, (1133), 964 states have call successors, (1133) [2021-12-06 21:10:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 6059 transitions. [2021-12-06 21:10:16,516 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 6059 transitions. Word has length 69 [2021-12-06 21:10:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:16,516 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 6059 transitions. [2021-12-06 21:10:16,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:10:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 6059 transitions. [2021-12-06 21:10:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 21:10:16,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:16,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:16,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:16,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:16,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash 526315605, now seen corresponding path program 2 times [2021-12-06 21:10:16,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:16,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35188034] [2021-12-06 21:10:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:16,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 21:10:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 21:10:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 21:10:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 21:10:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 21:10:16,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35188034] [2021-12-06 21:10:16,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35188034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:16,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:16,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:10:16,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281341471] [2021-12-06 21:10:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:16,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:16,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:16,955 INFO L87 Difference]: Start difference. First operand 4291 states and 6059 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:10:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:26,033 INFO L93 Difference]: Finished difference Result 9329 states and 13474 transitions. [2021-12-06 21:10:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 21:10:26,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-12-06 21:10:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:26,047 INFO L225 Difference]: With dead ends: 9329 [2021-12-06 21:10:26,048 INFO L226 Difference]: Without dead ends: 5205 [2021-12-06 21:10:26,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:10:26,062 INFO L933 BasicCegarLoop]: 3541 mSDtfsCounter, 6045 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 6075 mSolverCounterSat, 4471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6365 SdHoareTripleChecker+Valid, 6342 SdHoareTripleChecker+Invalid, 10546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4471 IncrementalHoareTripleChecker+Valid, 6075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:26,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6365 Valid, 6342 Invalid, 10546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4471 Valid, 6075 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-06 21:10:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5205 states. [2021-12-06 21:10:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5205 to 4212. [2021-12-06 21:10:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 2979 states have (on average 1.3037932192010742) internal successors, (3884), 3032 states have internal predecessors, (3884), 969 states have call successors, (969), 241 states have call predecessors, (969), 263 states have return successors, (1040), 957 states have call predecessors, (1040), 948 states have call successors, (1040) [2021-12-06 21:10:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 5893 transitions. [2021-12-06 21:10:26,218 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 5893 transitions. Word has length 75 [2021-12-06 21:10:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:26,218 INFO L470 AbstractCegarLoop]: Abstraction has 4212 states and 5893 transitions. [2021-12-06 21:10:26,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:10:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 5893 transitions. [2021-12-06 21:10:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 21:10:26,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:26,221 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-06 21:10:26,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:10:26,221 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1029372965, now seen corresponding path program 1 times [2021-12-06 21:10:26,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:26,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81167873] [2021-12-06 21:10:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:26,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 21:10:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 21:10:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 21:10:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 21:10:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:26,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81167873] [2021-12-06 21:10:26,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81167873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947499549] [2021-12-06 21:10:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:26,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:26,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:26,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:10:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:10:26,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:27,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:27,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947499549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:27,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:27,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2021-12-06 21:10:27,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988284787] [2021-12-06 21:10:27,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:10:27,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:10:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:10:27,131 INFO L87 Difference]: Start difference. First operand 4212 states and 5893 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:10:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:36,196 INFO L93 Difference]: Finished difference Result 9398 states and 13384 transitions. [2021-12-06 21:10:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 21:10:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 79 [2021-12-06 21:10:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:36,211 INFO L225 Difference]: With dead ends: 9398 [2021-12-06 21:10:36,211 INFO L226 Difference]: Without dead ends: 5212 [2021-12-06 21:10:36,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:10:36,219 INFO L933 BasicCegarLoop]: 2294 mSDtfsCounter, 3263 mSDsluCounter, 8294 mSDsCounter, 0 mSdLazyCounter, 9174 mSolverCounterSat, 2440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 10588 SdHoareTripleChecker+Invalid, 11614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2440 IncrementalHoareTripleChecker+Valid, 9174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:36,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3491 Valid, 10588 Invalid, 11614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2440 Valid, 9174 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-06 21:10:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2021-12-06 21:10:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 4224. [2021-12-06 21:10:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 2991 states have (on average 1.3025743898361752) internal successors, (3896), 3044 states have internal predecessors, (3896), 969 states have call successors, (969), 241 states have call predecessors, (969), 263 states have return successors, (1040), 957 states have call predecessors, (1040), 948 states have call successors, (1040) [2021-12-06 21:10:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 5905 transitions. [2021-12-06 21:10:36,370 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 5905 transitions. Word has length 79 [2021-12-06 21:10:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:36,370 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 5905 transitions. [2021-12-06 21:10:36,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:10:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 5905 transitions. [2021-12-06 21:10:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 21:10:36,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:36,373 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-12-06 21:10:36,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:10:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 21:10:36,573 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash -497810435, now seen corresponding path program 2 times [2021-12-06 21:10:36,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:36,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251810642] [2021-12-06 21:10:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:36,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 21:10:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 21:10:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 21:10:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 21:10:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:36,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:36,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251810642] [2021-12-06 21:10:36,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251810642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:36,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781311462] [2021-12-06 21:10:36,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:10:36,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:36,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:36,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:36,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:10:38,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:10:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 3233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:10:38,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:38,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:38,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781311462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:38,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:38,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 28 [2021-12-06 21:10:38,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289272844] [2021-12-06 21:10:38,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:38,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 21:10:38,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 21:10:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:10:38,523 INFO L87 Difference]: Start difference. First operand 4224 states and 5905 transitions. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:10:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:46,396 INFO L93 Difference]: Finished difference Result 9422 states and 13414 transitions. [2021-12-06 21:10:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 21:10:46,397 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 91 [2021-12-06 21:10:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:46,411 INFO L225 Difference]: With dead ends: 9422 [2021-12-06 21:10:46,411 INFO L226 Difference]: Without dead ends: 5236 [2021-12-06 21:10:46,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2021-12-06 21:10:46,421 INFO L933 BasicCegarLoop]: 2300 mSDtfsCounter, 3286 mSDsluCounter, 5577 mSDsCounter, 0 mSdLazyCounter, 6500 mSolverCounterSat, 2448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3514 SdHoareTripleChecker+Valid, 7877 SdHoareTripleChecker+Invalid, 8948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2448 IncrementalHoareTripleChecker+Valid, 6500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:46,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3514 Valid, 7877 Invalid, 8948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2448 Valid, 6500 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-12-06 21:10:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2021-12-06 21:10:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4248. [2021-12-06 21:10:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 3015 states have (on average 1.3001658374792704) internal successors, (3920), 3068 states have internal predecessors, (3920), 969 states have call successors, (969), 241 states have call predecessors, (969), 263 states have return successors, (1040), 957 states have call predecessors, (1040), 948 states have call successors, (1040) [2021-12-06 21:10:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 5929 transitions. [2021-12-06 21:10:46,594 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 5929 transitions. Word has length 91 [2021-12-06 21:10:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 4248 states and 5929 transitions. [2021-12-06 21:10:46,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:10:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 5929 transitions. [2021-12-06 21:10:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 21:10:46,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:46,597 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-12-06 21:10:46,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:10:46,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:10:46,798 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash 308086701, now seen corresponding path program 3 times [2021-12-06 21:10:46,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:46,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9984317] [2021-12-06 21:10:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:46,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 21:10:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 21:10:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 21:10:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 21:10:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:10:47,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:47,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9984317] [2021-12-06 21:10:47,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9984317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:47,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588734476] [2021-12-06 21:10:47,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:10:47,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:47,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:10:48,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:10:48,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:10:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-12-06 21:10:48,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:48,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588734476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:48,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:10:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 31 [2021-12-06 21:10:48,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571979740] [2021-12-06 21:10:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:48,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:48,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-12-06 21:10:48,805 INFO L87 Difference]: Start difference. First operand 4248 states and 5929 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 21:10:50,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:10:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:51,047 INFO L93 Difference]: Finished difference Result 8295 states and 11598 transitions. [2021-12-06 21:10:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2021-12-06 21:10:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:51,061 INFO L225 Difference]: With dead ends: 8295 [2021-12-06 21:10:51,061 INFO L226 Difference]: Without dead ends: 4232 [2021-12-06 21:10:51,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 21:10:51,071 INFO L933 BasicCegarLoop]: 2547 mSDtfsCounter, 4 mSDsluCounter, 7619 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10166 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10166 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 21:10:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2021-12-06 21:10:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 4232. [2021-12-06 21:10:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4232 states, 3006 states have (on average 1.2997338656021291) internal successors, (3907), 3057 states have internal predecessors, (3907), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2021-12-06 21:10:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4232 states to 4232 states and 5908 transitions. [2021-12-06 21:10:51,216 INFO L78 Accepts]: Start accepts. Automaton has 4232 states and 5908 transitions. Word has length 115 [2021-12-06 21:10:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:51,216 INFO L470 AbstractCegarLoop]: Abstraction has 4232 states and 5908 transitions. [2021-12-06 21:10:51,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 21:10:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4232 states and 5908 transitions. [2021-12-06 21:10:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 21:10:51,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:51,219 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-12-06 21:10:51,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:51,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:51,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash 773365027, now seen corresponding path program 1 times [2021-12-06 21:10:51,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:51,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884540277] [2021-12-06 21:10:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:51,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:51,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:51,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:10:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:10:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 21:10:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 21:10:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:10:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:10:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 21:10:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 21:10:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 21:10:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-12-06 21:10:52,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884540277] [2021-12-06 21:10:52,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884540277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:52,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:52,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 21:10:52,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305254636] [2021-12-06 21:10:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:52,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:10:52,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:10:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:52,065 INFO L87 Difference]: Start difference. First operand 4232 states and 5908 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (16), 5 states have call predecessors, (16), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 21:10:54,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:11:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:04,039 INFO L93 Difference]: Finished difference Result 9270 states and 13191 transitions. [2021-12-06 21:11:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:11:04,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (16), 5 states have call predecessors, (16), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 139 [2021-12-06 21:11:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:04,053 INFO L225 Difference]: With dead ends: 9270 [2021-12-06 21:11:04,053 INFO L226 Difference]: Without dead ends: 5220 [2021-12-06 21:11:04,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:11:04,061 INFO L933 BasicCegarLoop]: 2278 mSDtfsCounter, 2244 mSDsluCounter, 8451 mSDsCounter, 0 mSdLazyCounter, 9691 mSolverCounterSat, 1546 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 10729 SdHoareTripleChecker+Invalid, 11238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1546 IncrementalHoareTripleChecker+Valid, 9691 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:04,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2468 Valid, 10729 Invalid, 11238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1546 Valid, 9691 Invalid, 1 Unknown, 0 Unchecked, 11.6s Time] [2021-12-06 21:11:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-12-06 21:11:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 4232. [2021-12-06 21:11:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4232 states, 3006 states have (on average 1.2994011976047903) internal successors, (3906), 3057 states have internal predecessors, (3906), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2021-12-06 21:11:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4232 states to 4232 states and 5907 transitions. [2021-12-06 21:11:04,227 INFO L78 Accepts]: Start accepts. Automaton has 4232 states and 5907 transitions. Word has length 139 [2021-12-06 21:11:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:04,227 INFO L470 AbstractCegarLoop]: Abstraction has 4232 states and 5907 transitions. [2021-12-06 21:11:04,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (16), 5 states have call predecessors, (16), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 21:11:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4232 states and 5907 transitions. [2021-12-06 21:11:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 21:11:04,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:04,230 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-12-06 21:11:04,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:11:04,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1951729607, now seen corresponding path program 1 times [2021-12-06 21:11:04,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:04,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046189633] [2021-12-06 21:11:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:04,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:11:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:11:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:11:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:11:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 21:11:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 21:11:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 21:11:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 21:11:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 21:11:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 21:11:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 21:11:05,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:05,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046189633] [2021-12-06 21:11:05,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046189633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:11:05,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:11:05,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 21:11:05,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678107625] [2021-12-06 21:11:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:11:05,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:11:05,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:11:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:11:05,204 INFO L87 Difference]: Start difference. First operand 4232 states and 5907 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:11:07,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:11:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:17,002 INFO L93 Difference]: Finished difference Result 9270 states and 13190 transitions. [2021-12-06 21:11:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:11:17,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 147 [2021-12-06 21:11:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:17,015 INFO L225 Difference]: With dead ends: 9270 [2021-12-06 21:11:17,015 INFO L226 Difference]: Without dead ends: 5220 [2021-12-06 21:11:17,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:11:17,024 INFO L933 BasicCegarLoop]: 2279 mSDtfsCounter, 3262 mSDsluCounter, 8182 mSDsCounter, 0 mSdLazyCounter, 9192 mSolverCounterSat, 2402 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 10461 SdHoareTripleChecker+Invalid, 11595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2402 IncrementalHoareTripleChecker+Valid, 9192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:17,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3490 Valid, 10461 Invalid, 11595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2402 Valid, 9192 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2021-12-06 21:11:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-12-06 21:11:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 4232. [2021-12-06 21:11:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4232 states, 3006 states have (on average 1.2990685296074518) internal successors, (3905), 3057 states have internal predecessors, (3905), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2021-12-06 21:11:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4232 states to 4232 states and 5906 transitions. [2021-12-06 21:11:17,183 INFO L78 Accepts]: Start accepts. Automaton has 4232 states and 5906 transitions. Word has length 147 [2021-12-06 21:11:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:17,183 INFO L470 AbstractCegarLoop]: Abstraction has 4232 states and 5906 transitions. [2021-12-06 21:11:17,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 7 states have internal predecessors, (68), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:11:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4232 states and 5906 transitions. [2021-12-06 21:11:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 21:11:17,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:17,188 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-12-06 21:11:17,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:11:17,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash 375890940, now seen corresponding path program 1 times [2021-12-06 21:11:17,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:17,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362996520] [2021-12-06 21:11:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:17,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:11:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:11:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:11:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:11:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 21:11:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 21:11:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 21:11:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 21:11:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 21:11:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 21:11:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:11:18,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362996520] [2021-12-06 21:11:18,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362996520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962401745] [2021-12-06 21:11:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:18,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:18,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:18,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:18,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:11:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:19,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 8673 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 21:11:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 6 proven. 484 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:11:19,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:11:20,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962401745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:20,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:20,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 52 [2021-12-06 21:11:20,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127588983] [2021-12-06 21:11:20,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:20,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:11:20,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:11:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=1469, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:11:20,299 INFO L87 Difference]: Start difference. First operand 4232 states and 5906 transitions. Second operand has 52 states, 52 states have (on average 3.5576923076923075) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:11:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:29,529 INFO L93 Difference]: Finished difference Result 9438 states and 13428 transitions. [2021-12-06 21:11:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 21:11:29,530 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5576923076923075) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 150 [2021-12-06 21:11:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:29,543 INFO L225 Difference]: With dead ends: 9438 [2021-12-06 21:11:29,543 INFO L226 Difference]: Without dead ends: 5268 [2021-12-06 21:11:29,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:11:29,552 INFO L933 BasicCegarLoop]: 2275 mSDtfsCounter, 3298 mSDsluCounter, 6807 mSDsCounter, 0 mSdLazyCounter, 7935 mSolverCounterSat, 2440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 9082 SdHoareTripleChecker+Invalid, 10375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2440 IncrementalHoareTripleChecker+Valid, 7935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:29,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3523 Valid, 9082 Invalid, 10375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2440 Valid, 7935 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-06 21:11:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-06 21:11:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4280. [2021-12-06 21:11:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 3054 states have (on average 1.2943680419122463) internal successors, (3953), 3105 states have internal predecessors, (3953), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2021-12-06 21:11:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 5954 transitions. [2021-12-06 21:11:29,718 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 5954 transitions. Word has length 150 [2021-12-06 21:11:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:29,718 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 5954 transitions. [2021-12-06 21:11:29,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5576923076923075) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:11:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 5954 transitions. [2021-12-06 21:11:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-06 21:11:29,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:29,722 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 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] [2021-12-06 21:11:29,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:11:29,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:29,923 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash -641757028, now seen corresponding path program 2 times [2021-12-06 21:11:29,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500298363] [2021-12-06 21:11:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:29,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:11:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:11:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:11:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:11:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 21:11:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 21:11:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 21:11:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 21:11:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 21:11:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 21:11:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2130 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:11:31,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:31,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500298363] [2021-12-06 21:11:31,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500298363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:31,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741454868] [2021-12-06 21:11:31,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:11:31,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:31,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:31,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:11:33,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:11:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:33,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 9033 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 21:11:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2130 backedges. 6 proven. 2116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:11:33,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2130 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:11:36,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741454868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:36,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:36,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 100 [2021-12-06 21:11:36,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101319229] [2021-12-06 21:11:36,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:36,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 21:11:36,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 21:11:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4663, Invalid=5237, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 21:11:36,273 INFO L87 Difference]: Start difference. First operand 4280 states and 5954 transitions. Second operand has 100 states, 100 states have (on average 2.81) internal successors, (281), 97 states have internal predecessors, (281), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:11:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:49,980 INFO L93 Difference]: Finished difference Result 9534 states and 13548 transitions. [2021-12-06 21:11:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 21:11:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.81) internal successors, (281), 97 states have internal predecessors, (281), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 198 [2021-12-06 21:11:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:49,993 INFO L225 Difference]: With dead ends: 9534 [2021-12-06 21:11:49,993 INFO L226 Difference]: Without dead ends: 5364 [2021-12-06 21:11:50,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4673, Invalid=5629, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 21:11:50,004 INFO L933 BasicCegarLoop]: 2276 mSDtfsCounter, 3346 mSDsluCounter, 12207 mSDsCounter, 0 mSdLazyCounter, 13434 mSolverCounterSat, 2474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3571 SdHoareTripleChecker+Valid, 14483 SdHoareTripleChecker+Invalid, 15908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2474 IncrementalHoareTripleChecker+Valid, 13434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:50,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3571 Valid, 14483 Invalid, 15908 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2474 Valid, 13434 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2021-12-06 21:11:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-12-06 21:11:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 4376. [2021-12-06 21:11:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4376 states, 3150 states have (on average 1.2853968253968253) internal successors, (4049), 3201 states have internal predecessors, (4049), 965 states have call successors, (965), 238 states have call predecessors, (965), 260 states have return successors, (1036), 953 states have call predecessors, (1036), 944 states have call successors, (1036) [2021-12-06 21:11:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 6050 transitions. [2021-12-06 21:11:50,177 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 6050 transitions. Word has length 198 [2021-12-06 21:11:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:50,178 INFO L470 AbstractCegarLoop]: Abstraction has 4376 states and 6050 transitions. [2021-12-06 21:11:50,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.81) internal successors, (281), 97 states have internal predecessors, (281), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:11:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 6050 transitions. [2021-12-06 21:11:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-06 21:11:50,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:50,181 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 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] [2021-12-06 21:11:50,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:11:50,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:50,383 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1462228516, now seen corresponding path program 3 times [2021-12-06 21:11:50,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:50,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898622913] [2021-12-06 21:11:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:50,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:11:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:11:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:11:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:11:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-06 21:11:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-06 21:11:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:11:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2021-12-06 21:11:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:53,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2021-12-06 21:11:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:54,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2021-12-06 21:11:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2021-12-06 21:11:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 2 proven. 8836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:11:54,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:54,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898622913] [2021-12-06 21:11:54,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898622913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:54,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609963428] [2021-12-06 21:11:54,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:11:54,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:54,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:54,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:54,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:11:55,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:11:55,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 3198 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:11:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8843 trivial. 0 not checked. [2021-12-06 21:11:56,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:11:56,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609963428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:11:56,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:11:56,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [100] total 108 [2021-12-06 21:11:56,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612054478] [2021-12-06 21:11:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:11:56,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:11:56,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:11:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4679, Invalid=6877, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 21:11:56,422 INFO L87 Difference]: Start difference. First operand 4376 states and 6050 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:11:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:56,761 INFO L93 Difference]: Finished difference Result 8559 states and 11936 transitions. [2021-12-06 21:11:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:11:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) Word has length 294 [2021-12-06 21:11:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:56,777 INFO L225 Difference]: With dead ends: 8559 [2021-12-06 21:11:56,777 INFO L226 Difference]: Without dead ends: 4398 [2021-12-06 21:11:56,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4683, Invalid=7089, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 21:11:56,791 INFO L933 BasicCegarLoop]: 2532 mSDtfsCounter, 2 mSDsluCounter, 20246 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22778 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:56,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22778 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:11:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2021-12-06 21:11:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 4385. [2021-12-06 21:11:56,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4385 states, 3156 states have (on average 1.2848542458808618) internal successors, (4055), 3208 states have internal predecessors, (4055), 965 states have call successors, (965), 238 states have call predecessors, (965), 263 states have return successors, (1058), 955 states have call predecessors, (1058), 944 states have call successors, (1058) [2021-12-06 21:11:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 6078 transitions. [2021-12-06 21:11:56,947 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 6078 transitions. Word has length 294 [2021-12-06 21:11:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:56,948 INFO L470 AbstractCegarLoop]: Abstraction has 4385 states and 6078 transitions. [2021-12-06 21:11:56,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:11:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 6078 transitions. [2021-12-06 21:11:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-06 21:11:56,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:56,972 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 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] [2021-12-06 21:11:57,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:11:57,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:57,174 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1088401641, now seen corresponding path program 1 times [2021-12-06 21:11:57,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:57,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77679991] [2021-12-06 21:11:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:57,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:12:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:12:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:12:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:12:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-06 21:12:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-06 21:12:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:12:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:12:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-06 21:12:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2021-12-06 21:12:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2021-12-06 21:12:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 281 [2021-12-06 21:12:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 2 proven. 8836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:12:00,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:12:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77679991] [2021-12-06 21:12:00,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77679991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:12:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381347784] [2021-12-06 21:12:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:12:00,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:12:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:12:00,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:12:00,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:12:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 9783 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 21:12:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 6 proven. 8836 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:12:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 2 proven. 8836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:12:11,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381347784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:11,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:12:11,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 97, 97] total 196 [2021-12-06 21:12:11,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667140454] [2021-12-06 21:12:11,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:11,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2021-12-06 21:12:11,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:12:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2021-12-06 21:12:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18535, Invalid=19685, Unknown=0, NotChecked=0, Total=38220 [2021-12-06 21:12:11,166 INFO L87 Difference]: Start difference. First operand 4385 states and 6078 transitions. Second operand has 196 states, 196 states have (on average 2.4489795918367347) internal successors, (480), 193 states have internal predecessors, (480), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:12:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:12:22,991 INFO L93 Difference]: Finished difference Result 9735 states and 13814 transitions. [2021-12-06 21:12:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-12-06 21:12:22,992 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 2.4489795918367347) internal successors, (480), 193 states have internal predecessors, (480), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 297 [2021-12-06 21:12:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:12:23,005 INFO L225 Difference]: With dead ends: 9735 [2021-12-06 21:12:23,006 INFO L226 Difference]: Without dead ends: 5556 [2021-12-06 21:12:23,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=18545, Invalid=20461, Unknown=0, NotChecked=0, Total=39006 [2021-12-06 21:12:23,015 INFO L933 BasicCegarLoop]: 2275 mSDtfsCounter, 2519 mSDsluCounter, 8423 mSDsCounter, 0 mSdLazyCounter, 9994 mSolverCounterSat, 1655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2747 SdHoareTripleChecker+Valid, 10698 SdHoareTripleChecker+Invalid, 11649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1655 IncrementalHoareTripleChecker+Valid, 9994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:12:23,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2747 Valid, 10698 Invalid, 11649 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1655 Valid, 9994 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-12-06 21:12:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-12-06 21:12:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 4577. [2021-12-06 21:12:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 3348 states have (on average 1.2685185185185186) internal successors, (4247), 3400 states have internal predecessors, (4247), 965 states have call successors, (965), 238 states have call predecessors, (965), 263 states have return successors, (1058), 955 states have call predecessors, (1058), 944 states have call successors, (1058) [2021-12-06 21:12:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 6270 transitions. [2021-12-06 21:12:23,181 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 6270 transitions. Word has length 297 [2021-12-06 21:12:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:12:23,181 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 6270 transitions. [2021-12-06 21:12:23,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 2.4489795918367347) internal successors, (480), 193 states have internal predecessors, (480), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:12:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 6270 transitions. [2021-12-06 21:12:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-12-06 21:12:23,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:12:23,185 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 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] [2021-12-06 21:12:23,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 21:12:23,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:12:23,387 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:12:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:12:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1635806825, now seen corresponding path program 2 times [2021-12-06 21:12:23,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:12:23,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522772398] [2021-12-06 21:12:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:12:23,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:12:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:12:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:12:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:12:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:12:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2021-12-06 21:12:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2021-12-06 21:12:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:12:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:12:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2021-12-06 21:12:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 461 [2021-12-06 21:12:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2021-12-06 21:12:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 473 [2021-12-06 21:12:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36114 backedges. 2 proven. 36100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:12:34,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:12:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522772398] [2021-12-06 21:12:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522772398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:12:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719062205] [2021-12-06 21:12:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:12:34,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:12:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:12:34,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:12:34,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:12:37,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:12:37,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:12:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 11223 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-06 21:12:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36114 backedges. 6 proven. 36100 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:12:38,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36114 backedges. 2 proven. 36100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:12:47,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719062205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:47,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:12:47,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 193, 193] total 260 [2021-12-06 21:12:47,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335081241] [2021-12-06 21:12:47,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:47,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 260 states [2021-12-06 21:12:47,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:12:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 260 interpolants. [2021-12-06 21:12:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32903, Invalid=34437, Unknown=0, NotChecked=0, Total=67340 [2021-12-06 21:12:47,500 INFO L87 Difference]: Start difference. First operand 4577 states and 6270 transitions. Second operand has 260 states, 260 states have (on average 2.3461538461538463) internal successors, (610), 257 states have internal predecessors, (610), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:13:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:13:02,739 INFO L93 Difference]: Finished difference Result 9863 states and 13910 transitions. [2021-12-06 21:13:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2021-12-06 21:13:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 260 states, 260 states have (on average 2.3461538461538463) internal successors, (610), 257 states have internal predecessors, (610), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 489 [2021-12-06 21:13:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:13:02,754 INFO L225 Difference]: With dead ends: 9863 [2021-12-06 21:13:02,754 INFO L226 Difference]: Without dead ends: 5684 [2021-12-06 21:13:02,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=32913, Invalid=35469, Unknown=0, NotChecked=0, Total=68382 [2021-12-06 21:13:02,765 INFO L933 BasicCegarLoop]: 2276 mSDtfsCounter, 3506 mSDsluCounter, 12215 mSDsCounter, 0 mSdLazyCounter, 13728 mSolverCounterSat, 2419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3735 SdHoareTripleChecker+Valid, 14491 SdHoareTripleChecker+Invalid, 16147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2419 IncrementalHoareTripleChecker+Valid, 13728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:13:02,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3735 Valid, 14491 Invalid, 16147 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2419 Valid, 13728 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2021-12-06 21:13:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-12-06 21:13:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4705. [2021-12-06 21:13:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4705 states, 3476 states have (on average 1.2586306098964326) internal successors, (4375), 3528 states have internal predecessors, (4375), 965 states have call successors, (965), 238 states have call predecessors, (965), 263 states have return successors, (1058), 955 states have call predecessors, (1058), 944 states have call successors, (1058) [2021-12-06 21:13:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4705 states to 4705 states and 6398 transitions. [2021-12-06 21:13:02,938 INFO L78 Accepts]: Start accepts. Automaton has 4705 states and 6398 transitions. Word has length 489 [2021-12-06 21:13:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:13:02,938 INFO L470 AbstractCegarLoop]: Abstraction has 4705 states and 6398 transitions. [2021-12-06 21:13:02,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 260 states, 260 states have (on average 2.3461538461538463) internal successors, (610), 257 states have internal predecessors, (610), 2 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 21:13:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4705 states and 6398 transitions. [2021-12-06 21:13:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-12-06 21:13:02,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:13:02,943 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 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] [2021-12-06 21:13:02,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:13:03,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:13:03,145 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:13:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash -277375127, now seen corresponding path program 3 times [2021-12-06 21:13:03,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:13:03,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231345937] [2021-12-06 21:13:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:03,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:13:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:13:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:13:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:13:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:13:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2021-12-06 21:13:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2021-12-06 21:13:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:13:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:13:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 569 [2021-12-06 21:13:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-12-06 21:13:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2021-12-06 21:13:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2021-12-06 21:13:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64528 trivial. 0 not checked. [2021-12-06 21:13:04,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:13:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231345937] [2021-12-06 21:13:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231345937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:13:04,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:13:04,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:13:04,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402098818] [2021-12-06 21:13:04,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:13:04,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:13:04,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:13:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:13:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:13:04,781 INFO L87 Difference]: Start difference. First operand 4705 states and 6398 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:13:07,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:13:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:13:14,958 INFO L93 Difference]: Finished difference Result 10388 states and 14369 transitions. [2021-12-06 21:13:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:13:14,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 617 [2021-12-06 21:13:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:13:14,976 INFO L225 Difference]: With dead ends: 10388 [2021-12-06 21:13:14,976 INFO L226 Difference]: Without dead ends: 5698 [2021-12-06 21:13:14,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:13:14,986 INFO L933 BasicCegarLoop]: 2277 mSDtfsCounter, 2272 mSDsluCounter, 4373 mSDsCounter, 0 mSdLazyCounter, 5591 mSolverCounterSat, 1550 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 6650 SdHoareTripleChecker+Invalid, 7142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1550 IncrementalHoareTripleChecker+Valid, 5591 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:13:14,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2502 Valid, 6650 Invalid, 7142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1550 Valid, 5591 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-12-06 21:13:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2021-12-06 21:13:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 4717. [2021-12-06 21:13:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 3485 states have (on average 1.2579626972740316) internal successors, (4384), 3537 states have internal predecessors, (4384), 965 states have call successors, (965), 241 states have call predecessors, (965), 266 states have return successors, (1057), 955 states have call predecessors, (1057), 944 states have call successors, (1057) [2021-12-06 21:13:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 6406 transitions. [2021-12-06 21:13:15,187 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 6406 transitions. Word has length 617 [2021-12-06 21:13:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:13:15,188 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 6406 transitions. [2021-12-06 21:13:15,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 21:13:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 6406 transitions. [2021-12-06 21:13:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-12-06 21:13:15,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:13:15,193 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 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] [2021-12-06 21:13:15,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:13:15,193 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:13:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -590156889, now seen corresponding path program 1 times [2021-12-06 21:13:15,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:13:15,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718779603] [2021-12-06 21:13:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:15,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:13:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:13:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:13:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:13:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:13:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2021-12-06 21:13:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2021-12-06 21:13:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:13:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:13:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 569 [2021-12-06 21:13:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-12-06 21:13:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2021-12-06 21:13:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2021-12-06 21:13:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64526 trivial. 0 not checked. [2021-12-06 21:13:16,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:13:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718779603] [2021-12-06 21:13:16,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718779603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834408981] [2021-12-06 21:13:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:16,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:13:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:13:16,642 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:13:16,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:14:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:14:21,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 12184 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 21:14:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:14:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64530 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 64524 trivial. 0 not checked. [2021-12-06 21:14:21,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:14:21,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834408981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:14:21,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:14:21,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 11 [2021-12-06 21:14:21,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138459524] [2021-12-06 21:14:21,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:14:21,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:14:21,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:14:21,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:14:21,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:14:21,685 INFO L87 Difference]: Start difference. First operand 4717 states and 6406 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 21:14:23,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:14:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:14:24,067 INFO L93 Difference]: Finished difference Result 9421 states and 12805 transitions. [2021-12-06 21:14:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:14:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 617 [2021-12-06 21:14:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:14:24,080 INFO L225 Difference]: With dead ends: 9421 [2021-12-06 21:14:24,080 INFO L226 Difference]: Without dead ends: 4723 [2021-12-06 21:14:24,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 638 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:14:24,090 INFO L933 BasicCegarLoop]: 2527 mSDtfsCounter, 38 mSDsluCounter, 15139 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17666 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:14:24,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17666 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 21:14:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-12-06 21:14:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4717. [2021-12-06 21:14:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 3485 states have (on average 1.2576757532281204) internal successors, (4383), 3537 states have internal predecessors, (4383), 965 states have call successors, (965), 241 states have call predecessors, (965), 266 states have return successors, (1057), 955 states have call predecessors, (1057), 944 states have call successors, (1057) [2021-12-06 21:14:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 6405 transitions. [2021-12-06 21:14:24,251 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 6405 transitions. Word has length 617 [2021-12-06 21:14:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:14:24,252 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 6405 transitions. [2021-12-06 21:14:24,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 21:14:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 6405 transitions. [2021-12-06 21:14:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2021-12-06 21:14:24,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:14:24,256 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 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] [2021-12-06 21:14:24,457 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forcibly destroying the process [2021-12-06 21:14:24,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 21:14:24,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:14:24,472 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:14:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:14:24,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1103297260, now seen corresponding path program 1 times [2021-12-06 21:14:24,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:14:24,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693201299] [2021-12-06 21:14:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:14:24,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:14:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:15:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:15:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:15:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:15:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 543 [2021-12-06 21:15:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 549 [2021-12-06 21:15:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:15:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:15:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2021-12-06 21:15:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2021-12-06 21:15:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2021-12-06 21:15:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2021-12-06 21:15:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:15:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64533 backedges. 2 proven. 254 refuted. 0 times theorem prover too weak. 64277 trivial. 0 not checked. [2021-12-06 21:15:01,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:15:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693201299] [2021-12-06 21:15:01,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693201299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:15:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617416037] [2021-12-06 21:15:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:15:01,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:15:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:15:01,680 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:15:01,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3c75d9-f343-433d-8d6f-4ca52d6be53f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process