./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 a9a20f3f691c8614da828fa262b8d39a0b290d1ce7d7bab1e11653a91cb5fcdd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:41:48,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:41:48,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:41:48,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:41:48,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:41:48,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:41:48,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:41:48,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:41:48,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:41:48,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:41:48,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:41:48,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:41:48,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:41:48,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:41:48,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:41:48,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:41:48,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:41:48,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:41:48,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:41:48,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:41:48,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:41:48,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:41:48,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:41:48,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:41:48,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:41:48,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:41:48,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:41:48,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:41:48,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:41:48,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:41:48,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:41:48,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:41:48,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:41:48,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:41:48,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:41:48,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:41:48,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:41:48,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:41:48,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:41:48,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:41:48,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:41:48,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:41:48,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:41:48,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:41:48,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:41:48,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:41:48,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:41:48,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:41:48,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:41:48,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:41:48,378 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:41:48,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:41:48,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:41:48,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:41:48,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:41:48,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:41:48,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:41:48,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:41:48,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:41:48,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:41:48,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:41:48,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:41:48,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:41:48,382 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:41:48,382 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:41:48,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:41:48,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:41:48,382 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9a20f3f691c8614da828fa262b8d39a0b290d1ce7d7bab1e11653a91cb5fcdd [2021-12-14 17:41:48,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:41:48,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:41:48,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:41:48,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:41:48,579 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:41:48,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i [2021-12-14 17:41:48,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efff5efa3/08d11f2917d741bf9d0ae3f1cb1f4afa/FLAGe027e56d3 [2021-12-14 17:41:49,178 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:41:49,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i [2021-12-14 17:41:49,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efff5efa3/08d11f2917d741bf9d0ae3f1cb1f4afa/FLAGe027e56d3 [2021-12-14 17:41:49,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efff5efa3/08d11f2917d741bf9d0ae3f1cb1f4afa [2021-12-14 17:41:49,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:41:49,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:41:49,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:41:49,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:41:49,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:41:49,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:49" (1/1) ... [2021-12-14 17:41:49,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d8b434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:49, skipping insertion in model container [2021-12-14 17:41:49,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:49" (1/1) ... [2021-12-14 17:41:49,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:41:49,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:41:50,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i[161908,161921] [2021-12-14 17:41:50,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:41:50,411 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:41:50,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i[161908,161921] [2021-12-14 17:41:50,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:41:50,591 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:41:50,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50 WrapperNode [2021-12-14 17:41:50,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:41:50,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:41:50,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:41:50,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:41:50,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,736 INFO L137 Inliner]: procedures = 139, calls = 575, calls flagged for inlining = 59, calls inlined = 59, statements flattened = 1725 [2021-12-14 17:41:50,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:41:50,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:41:50,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:41:50,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:41:50,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:41:50,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:41:50,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:41:50,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:41:50,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (1/1) ... [2021-12-14 17:41:50,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:41:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:41:50,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:41:50,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:41:50,951 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-12-14 17:41:50,951 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-12-14 17:41:50,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:41:50,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:41:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:41:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:41:50,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:41:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:41:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2021-12-14 17:41:50,952 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2021-12-14 17:41:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-12-14 17:41:50,952 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-12-14 17:41:50,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:41:50,953 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:41:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:41:50,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:41:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-12-14 17:41:50,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-12-14 17:41:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:41:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_suspend [2021-12-14 17:41:50,953 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_suspend [2021-12-14 17:41:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:41:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:41:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_resume [2021-12-14 17:41:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_resume [2021-12-14 17:41:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:41:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:41:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-14 17:41:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-14 17:41:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:41:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:41:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:41:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:41:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_tx_fixup [2021-12-14 17:41:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_tx_fixup [2021-12-14 17:41:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:41:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-14 17:41:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-14 17:41:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2021-12-14 17:41:50,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2021-12-14 17:41:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:41:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-14 17:41:50,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-14 17:41:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:41:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:41:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 17:41:50,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 17:41:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_bind [2021-12-14 17:41:50,957 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_bind [2021-12-14 17:41:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_manage_power [2021-12-14 17:41:50,957 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_manage_power [2021-12-14 17:41:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-14 17:41:50,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-14 17:41:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:41:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-12-14 17:41:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:41:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:41:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-14 17:41:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-14 17:41:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_rx_fixup [2021-12-14 17:41:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_rx_fixup [2021-12-14 17:41:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-12-14 17:41:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-12-14 17:41:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_unbind [2021-12-14 17:41:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_unbind [2021-12-14 17:41:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_unbind [2021-12-14 17:41:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_unbind [2021-12-14 17:41:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:41:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-12-14 17:41:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-12-14 17:41:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:41:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:41:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:41:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:41:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:41:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure eth_hdr [2021-12-14 17:41:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_hdr [2021-12-14 17:41:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-14 17:41:50,963 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-14 17:41:51,370 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:41:51,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:41:51,879 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:41:52,081 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-14 17:41:52,261 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:41:52,268 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:41:52,268 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:41:52,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:41:52 BoogieIcfgContainer [2021-12-14 17:41:52,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:41:52,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:41:52,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:41:52,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:41:52,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:41:49" (1/3) ... [2021-12-14 17:41:52,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68258262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:41:52, skipping insertion in model container [2021-12-14 17:41:52,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:50" (2/3) ... [2021-12-14 17:41:52,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68258262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:41:52, skipping insertion in model container [2021-12-14 17:41:52,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:41:52" (3/3) ... [2021-12-14 17:41:52,276 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i [2021-12-14 17:41:52,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:41:52,279 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:41:52,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:41:52,311 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 [2021-12-14 17:41:52,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:41:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 523 states, 398 states have (on average 1.407035175879397) internal successors, (560), 412 states have internal predecessors, (560), 94 states have call successors, (94), 31 states have call predecessors, (94), 29 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2021-12-14 17:41:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 17:41:52,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:52,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:52,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1589467643, now seen corresponding path program 1 times [2021-12-14 17:41:52,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:52,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155162645] [2021-12-14 17:41:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:52,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:52,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:52,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155162645] [2021-12-14 17:41:52,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155162645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:52,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:52,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:52,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073364558] [2021-12-14 17:41:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:52,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:52,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:52,754 INFO L87 Difference]: Start difference. First operand has 523 states, 398 states have (on average 1.407035175879397) internal successors, (560), 412 states have internal predecessors, (560), 94 states have call successors, (94), 31 states have call predecessors, (94), 29 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:41:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:54,108 INFO L93 Difference]: Finished difference Result 1672 states and 2474 transitions. [2021-12-14 17:41:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:41:54,110 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-12-14 17:41:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:54,144 INFO L225 Difference]: With dead ends: 1672 [2021-12-14 17:41:54,145 INFO L226 Difference]: Without dead ends: 1132 [2021-12-14 17:41:54,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:41:54,176 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 1145 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:54,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 2236 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 17:41:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-14 17:41:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 969. [2021-12-14 17:41:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 753 states have (on average 1.3957503320053122) internal successors, (1051), 760 states have internal predecessors, (1051), 159 states have call successors, (159), 57 states have call predecessors, (159), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-14 17:41:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1363 transitions. [2021-12-14 17:41:54,332 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1363 transitions. Word has length 40 [2021-12-14 17:41:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1363 transitions. [2021-12-14 17:41:54,333 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), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:41:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1363 transitions. [2021-12-14 17:41:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 17:41:54,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:54,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:54,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:41:54,337 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1949626109, now seen corresponding path program 1 times [2021-12-14 17:41:54,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806060181] [2021-12-14 17:41:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:54,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:41:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:41:54,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:54,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806060181] [2021-12-14 17:41:54,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806060181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:54,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:54,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:54,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326219246] [2021-12-14 17:41:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:54,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:54,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:54,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:54,476 INFO L87 Difference]: Start difference. First operand 969 states and 1363 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:55,205 INFO L93 Difference]: Finished difference Result 1131 states and 1631 transitions. [2021-12-14 17:41:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:41:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2021-12-14 17:41:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:55,210 INFO L225 Difference]: With dead ends: 1131 [2021-12-14 17:41:55,210 INFO L226 Difference]: Without dead ends: 1128 [2021-12-14 17:41:55,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:41:55,211 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 948 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:55,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1470 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:41:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-12-14 17:41:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 968. [2021-12-14 17:41:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 753 states have (on average 1.3944223107569722) internal successors, (1050), 759 states have internal predecessors, (1050), 158 states have call successors, (158), 57 states have call predecessors, (158), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-14 17:41:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1361 transitions. [2021-12-14 17:41:55,243 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1361 transitions. Word has length 50 [2021-12-14 17:41:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:55,244 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1361 transitions. [2021-12-14 17:41:55,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1361 transitions. [2021-12-14 17:41:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 17:41:55,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:55,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:55,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:41:55,247 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 308647439, now seen corresponding path program 1 times [2021-12-14 17:41:55,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497137794] [2021-12-14 17:41:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:55,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:55,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:55,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:55,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:55,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:55,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:41:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:41:55,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497137794] [2021-12-14 17:41:55,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497137794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:55,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:55,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:55,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785079692] [2021-12-14 17:41:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:55,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:55,346 INFO L87 Difference]: Start difference. First operand 968 states and 1361 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:56,021 INFO L93 Difference]: Finished difference Result 1130 states and 1629 transitions. [2021-12-14 17:41:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:41:56,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2021-12-14 17:41:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:56,026 INFO L225 Difference]: With dead ends: 1130 [2021-12-14 17:41:56,026 INFO L226 Difference]: Without dead ends: 1127 [2021-12-14 17:41:56,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:41:56,027 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 945 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:56,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 1466 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:41:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-14 17:41:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 967. [2021-12-14 17:41:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 753 states have (on average 1.3930942895086322) internal successors, (1049), 758 states have internal predecessors, (1049), 157 states have call successors, (157), 57 states have call predecessors, (157), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-14 17:41:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1359 transitions. [2021-12-14 17:41:56,058 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1359 transitions. Word has length 51 [2021-12-14 17:41:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:56,058 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1359 transitions. [2021-12-14 17:41:56,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1359 transitions. [2021-12-14 17:41:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 17:41:56,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:56,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:56,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:41:56,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 977921088, now seen corresponding path program 1 times [2021-12-14 17:41:56,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842733508] [2021-12-14 17:41:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:56,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:41:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:41:56,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842733508] [2021-12-14 17:41:56,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842733508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:56,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:56,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:56,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016215349] [2021-12-14 17:41:56,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:56,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:56,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:56,176 INFO L87 Difference]: Start difference. First operand 967 states and 1359 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:56,809 INFO L93 Difference]: Finished difference Result 1129 states and 1627 transitions. [2021-12-14 17:41:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:41:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2021-12-14 17:41:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:56,814 INFO L225 Difference]: With dead ends: 1129 [2021-12-14 17:41:56,814 INFO L226 Difference]: Without dead ends: 1126 [2021-12-14 17:41:56,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:41:56,815 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 942 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:56,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1462 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:41:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-12-14 17:41:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 966. [2021-12-14 17:41:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 753 states have (on average 1.3917662682602923) internal successors, (1048), 757 states have internal predecessors, (1048), 156 states have call successors, (156), 57 states have call predecessors, (156), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-14 17:41:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1357 transitions. [2021-12-14 17:41:56,859 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1357 transitions. Word has length 52 [2021-12-14 17:41:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:56,859 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1357 transitions. [2021-12-14 17:41:56,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1357 transitions. [2021-12-14 17:41:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 17:41:56,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:56,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:56,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:41:56,862 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash 250572594, now seen corresponding path program 1 times [2021-12-14 17:41:56,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:56,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388170694] [2021-12-14 17:41:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:56,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:41:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:41:56,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:56,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388170694] [2021-12-14 17:41:56,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388170694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:56,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:56,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:56,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981852771] [2021-12-14 17:41:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:56,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:56,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:56,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:56,997 INFO L87 Difference]: Start difference. First operand 966 states and 1357 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:58,172 INFO L93 Difference]: Finished difference Result 3187 states and 4578 transitions. [2021-12-14 17:41:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:41:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2021-12-14 17:41:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:58,185 INFO L225 Difference]: With dead ends: 3187 [2021-12-14 17:41:58,185 INFO L226 Difference]: Without dead ends: 2232 [2021-12-14 17:41:58,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:41:58,190 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 1173 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:58,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 2211 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:41:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-12-14 17:41:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1908. [2021-12-14 17:41:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1490 states have (on average 1.393959731543624) internal successors, (2077), 1496 states have internal predecessors, (2077), 305 states have call successors, (305), 113 states have call predecessors, (305), 112 states have return successors, (310), 302 states have call predecessors, (310), 302 states have call successors, (310) [2021-12-14 17:41:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2692 transitions. [2021-12-14 17:41:58,249 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2692 transitions. Word has length 53 [2021-12-14 17:41:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:58,251 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 2692 transitions. [2021-12-14 17:41:58,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2692 transitions. [2021-12-14 17:41:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 17:41:58,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:58,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:58,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:41:58,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash -822389373, now seen corresponding path program 1 times [2021-12-14 17:41:58,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:58,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071147365] [2021-12-14 17:41:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:58,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:41:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:41:58,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:58,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071147365] [2021-12-14 17:41:58,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071147365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:58,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:58,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:58,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154420301] [2021-12-14 17:41:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:58,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:58,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:58,344 INFO L87 Difference]: Start difference. First operand 1908 states and 2692 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:59,047 INFO L93 Difference]: Finished difference Result 2230 states and 3223 transitions. [2021-12-14 17:41:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:41:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2021-12-14 17:41:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:59,086 INFO L225 Difference]: With dead ends: 2230 [2021-12-14 17:41:59,086 INFO L226 Difference]: Without dead ends: 2218 [2021-12-14 17:41:59,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:41:59,087 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 938 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:59,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1461 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:41:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-12-14 17:41:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1898. [2021-12-14 17:41:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1481 states have (on average 1.3936529372045916) internal successors, (2064), 1486 states have internal predecessors, (2064), 304 states have call successors, (304), 113 states have call predecessors, (304), 112 states have return successors, (310), 302 states have call predecessors, (310), 302 states have call successors, (310) [2021-12-14 17:41:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2678 transitions. [2021-12-14 17:41:59,142 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2678 transitions. Word has length 54 [2021-12-14 17:41:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:59,143 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 2678 transitions. [2021-12-14 17:41:59,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 17:41:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2678 transitions. [2021-12-14 17:41:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 17:41:59,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:59,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:59,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:41:59,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:59,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1986046453, now seen corresponding path program 1 times [2021-12-14 17:41:59,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:59,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191338218] [2021-12-14 17:41:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:59,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:41:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:41:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:41:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:41:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:41:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:59,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:59,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191338218] [2021-12-14 17:41:59,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191338218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:59,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:59,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:41:59,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150939607] [2021-12-14 17:41:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:41:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:41:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:59,221 INFO L87 Difference]: Start difference. First operand 1898 states and 2678 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:42:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:00,391 INFO L93 Difference]: Finished difference Result 6142 states and 8755 transitions. [2021-12-14 17:42:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:42:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2021-12-14 17:42:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:00,407 INFO L225 Difference]: With dead ends: 6142 [2021-12-14 17:42:00,407 INFO L226 Difference]: Without dead ends: 4255 [2021-12-14 17:42:00,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:00,413 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 1124 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:00,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 2111 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:42:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-12-14 17:42:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3604. [2021-12-14 17:42:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2825 states have (on average 1.390796460176991) internal successors, (3929), 2834 states have internal predecessors, (3929), 555 states have call successors, (555), 224 states have call predecessors, (555), 223 states have return successors, (565), 553 states have call predecessors, (565), 553 states have call successors, (565) [2021-12-14 17:42:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5049 transitions. [2021-12-14 17:42:00,527 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5049 transitions. Word has length 66 [2021-12-14 17:42:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:00,527 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 5049 transitions. [2021-12-14 17:42:00,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:42:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5049 transitions. [2021-12-14 17:42:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 17:42:00,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:00,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:00,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:42:00,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -181003579, now seen corresponding path program 1 times [2021-12-14 17:42:00,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:00,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620519946] [2021-12-14 17:42:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:00,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:42:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:42:00,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620519946] [2021-12-14 17:42:00,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620519946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:00,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:00,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:42:00,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573981881] [2021-12-14 17:42:00,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:00,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:42:00,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:00,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:42:00,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:42:00,621 INFO L87 Difference]: Start difference. First operand 3604 states and 5049 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:42:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:01,976 INFO L93 Difference]: Finished difference Result 10431 states and 14766 transitions. [2021-12-14 17:42:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:42:01,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2021-12-14 17:42:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:02,066 INFO L225 Difference]: With dead ends: 10431 [2021-12-14 17:42:02,067 INFO L226 Difference]: Without dead ends: 6848 [2021-12-14 17:42:02,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:02,078 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 962 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2902 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:02,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 2902 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:42:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-12-14 17:42:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 5818. [2021-12-14 17:42:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 4560 states have (on average 1.3888157894736841) internal successors, (6333), 4575 states have internal predecessors, (6333), 882 states have call successors, (882), 376 states have call predecessors, (882), 375 states have return successors, (896), 878 states have call predecessors, (896), 880 states have call successors, (896) [2021-12-14 17:42:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8111 transitions. [2021-12-14 17:42:02,259 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8111 transitions. Word has length 65 [2021-12-14 17:42:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:02,260 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 8111 transitions. [2021-12-14 17:42:02,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:42:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8111 transitions. [2021-12-14 17:42:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-14 17:42:02,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:02,268 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 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] [2021-12-14 17:42:02,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:42:02,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1535676253, now seen corresponding path program 1 times [2021-12-14 17:42:02,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:02,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842472607] [2021-12-14 17:42:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:02,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:42:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:42:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:42:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:42:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:42:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:42:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:42:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-14 17:42:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-14 17:42:02,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:02,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842472607] [2021-12-14 17:42:02,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842472607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:02,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:02,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:42:02,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445170426] [2021-12-14 17:42:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:02,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:42:02,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:42:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:42:02,537 INFO L87 Difference]: Start difference. First operand 5818 states and 8111 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:42:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:04,597 INFO L93 Difference]: Finished difference Result 10230 states and 14590 transitions. [2021-12-14 17:42:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:42:04,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 122 [2021-12-14 17:42:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:04,630 INFO L225 Difference]: With dead ends: 10230 [2021-12-14 17:42:04,631 INFO L226 Difference]: Without dead ends: 10227 [2021-12-14 17:42:04,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:42:04,633 INFO L933 BasicCegarLoop]: 1327 mSDtfsCounter, 2079 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 3956 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:04,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 3956 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 17:42:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2021-12-14 17:42:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 8696. [2021-12-14 17:42:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8696 states, 6817 states have (on average 1.3902009681678158) internal successors, (9477), 6839 states have internal predecessors, (9477), 1318 states have call successors, (1318), 561 states have call predecessors, (1318), 560 states have return successors, (1364), 1313 states have call predecessors, (1364), 1316 states have call successors, (1364) [2021-12-14 17:42:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8696 states to 8696 states and 12159 transitions. [2021-12-14 17:42:04,918 INFO L78 Accepts]: Start accepts. Automaton has 8696 states and 12159 transitions. Word has length 122 [2021-12-14 17:42:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:04,919 INFO L470 AbstractCegarLoop]: Abstraction has 8696 states and 12159 transitions. [2021-12-14 17:42:04,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:42:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8696 states and 12159 transitions. [2021-12-14 17:42:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 17:42:04,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:04,923 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 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] [2021-12-14 17:42:04,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 17:42:04,924 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1504761742, now seen corresponding path program 1 times [2021-12-14 17:42:04,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146028996] [2021-12-14 17:42:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:04,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:04,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:04,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:04,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:42:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:42:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:42:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:42:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:42:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:42:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:42:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:42:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 17:42:05,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:05,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146028996] [2021-12-14 17:42:05,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146028996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:05,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:05,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:42:05,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202562847] [2021-12-14 17:42:05,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:05,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:42:05,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:42:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:42:05,046 INFO L87 Difference]: Start difference. First operand 8696 states and 12159 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-14 17:42:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:06,428 INFO L93 Difference]: Finished difference Result 24686 states and 34978 transitions. [2021-12-14 17:42:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:42:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2021-12-14 17:42:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:06,516 INFO L225 Difference]: With dead ends: 24686 [2021-12-14 17:42:06,531 INFO L226 Difference]: Without dead ends: 16027 [2021-12-14 17:42:06,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:06,564 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 1082 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:06,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2458 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:42:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16027 states. [2021-12-14 17:42:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16027 to 13615. [2021-12-14 17:42:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13615 states, 10743 states have (on average 1.385832635204319) internal successors, (14888), 10774 states have internal predecessors, (14888), 1996 states have call successors, (1996), 876 states have call predecessors, (1996), 875 states have return successors, (2054), 1988 states have call predecessors, (2054), 1994 states have call successors, (2054) [2021-12-14 17:42:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13615 states to 13615 states and 18938 transitions. [2021-12-14 17:42:07,073 INFO L78 Accepts]: Start accepts. Automaton has 13615 states and 18938 transitions. Word has length 123 [2021-12-14 17:42:07,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:07,074 INFO L470 AbstractCegarLoop]: Abstraction has 13615 states and 18938 transitions. [2021-12-14 17:42:07,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-14 17:42:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13615 states and 18938 transitions. [2021-12-14 17:42:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-14 17:42:07,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:07,083 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 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] [2021-12-14 17:42:07,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 17:42:07,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:07,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1949944417, now seen corresponding path program 1 times [2021-12-14 17:42:07,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:07,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928511918] [2021-12-14 17:42:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:07,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:42:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:42:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:42:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:42:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:42:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:42:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:42:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-14 17:42:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-14 17:42:07,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928511918] [2021-12-14 17:42:07,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928511918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:07,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:07,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:42:07,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698833888] [2021-12-14 17:42:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:07,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:42:07,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:42:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:42:07,252 INFO L87 Difference]: Start difference. First operand 13615 states and 18938 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:42:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:08,590 INFO L93 Difference]: Finished difference Result 20835 states and 29445 transitions. [2021-12-14 17:42:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:42:08,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 122 [2021-12-14 17:42:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:08,644 INFO L225 Difference]: With dead ends: 20835 [2021-12-14 17:42:08,644 INFO L226 Difference]: Without dead ends: 16267 [2021-12-14 17:42:08,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:42:08,661 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 272 mSDsluCounter, 3838 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 4493 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:08,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 4493 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:42:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16267 states. [2021-12-14 17:42:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16267 to 13754. [2021-12-14 17:42:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13754 states, 10862 states have (on average 1.380684956729884) internal successors, (14997), 10913 states have internal predecessors, (14997), 1996 states have call successors, (1996), 876 states have call predecessors, (1996), 895 states have return successors, (2094), 1988 states have call predecessors, (2094), 1994 states have call successors, (2094) [2021-12-14 17:42:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13754 states to 13754 states and 19087 transitions. [2021-12-14 17:42:09,164 INFO L78 Accepts]: Start accepts. Automaton has 13754 states and 19087 transitions. Word has length 122 [2021-12-14 17:42:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:09,164 INFO L470 AbstractCegarLoop]: Abstraction has 13754 states and 19087 transitions. [2021-12-14 17:42:09,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:42:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 13754 states and 19087 transitions. [2021-12-14 17:42:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 17:42:09,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:09,174 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:09,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:42:09,174 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1749310071, now seen corresponding path program 1 times [2021-12-14 17:42:09,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:09,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597917553] [2021-12-14 17:42:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:09,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:42:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:42:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:42:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:42:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:42:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:42:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:42:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:42:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 17:42:09,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597917553] [2021-12-14 17:42:09,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597917553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:09,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:09,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:42:09,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572895247] [2021-12-14 17:42:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:09,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:42:09,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:42:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:42:09,326 INFO L87 Difference]: Start difference. First operand 13754 states and 19087 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 17:42:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:11,174 INFO L93 Difference]: Finished difference Result 38432 states and 54071 transitions. [2021-12-14 17:42:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:42:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 141 [2021-12-14 17:42:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:11,247 INFO L225 Difference]: With dead ends: 38432 [2021-12-14 17:42:11,247 INFO L226 Difference]: Without dead ends: 24715 [2021-12-14 17:42:11,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:11,277 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 1197 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:11,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 2391 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:42:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24715 states. [2021-12-14 17:42:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24715 to 21044. [2021-12-14 17:42:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21044 states, 16733 states have (on average 1.3772784318412716) internal successors, (23046), 16802 states have internal predecessors, (23046), 2944 states have call successors, (2944), 1335 states have call predecessors, (2944), 1366 states have return successors, (3062), 2936 states have call predecessors, (3062), 2942 states have call successors, (3062) [2021-12-14 17:42:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21044 states to 21044 states and 29052 transitions. [2021-12-14 17:42:11,998 INFO L78 Accepts]: Start accepts. Automaton has 21044 states and 29052 transitions. Word has length 141 [2021-12-14 17:42:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:11,998 INFO L470 AbstractCegarLoop]: Abstraction has 21044 states and 29052 transitions. [2021-12-14 17:42:11,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 17:42:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21044 states and 29052 transitions. [2021-12-14 17:42:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-14 17:42:12,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:12,008 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:12,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 17:42:12,008 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1038448743, now seen corresponding path program 1 times [2021-12-14 17:42:12,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:12,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235890579] [2021-12-14 17:42:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:12,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:42:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:42:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:42:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:42:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:42:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:42:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:42:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:42:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-14 17:42:12,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235890579] [2021-12-14 17:42:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235890579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:12,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:42:12,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346288013] [2021-12-14 17:42:12,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:12,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:42:12,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:42:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:42:12,190 INFO L87 Difference]: Start difference. First operand 21044 states and 29052 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-14 17:42:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:13,706 INFO L93 Difference]: Finished difference Result 30746 states and 42907 transitions. [2021-12-14 17:42:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:42:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2021-12-14 17:42:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:13,760 INFO L225 Difference]: With dead ends: 30746 [2021-12-14 17:42:13,760 INFO L226 Difference]: Without dead ends: 16636 [2021-12-14 17:42:13,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:42:13,791 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 309 mSDsluCounter, 3091 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 3740 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:13,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 3740 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:42:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16636 states. [2021-12-14 17:42:14,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16636 to 14099. [2021-12-14 17:42:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14099 states, 11225 states have (on average 1.3730066815144766) internal successors, (15412), 11266 states have internal predecessors, (15412), 1966 states have call successors, (1966), 892 states have call predecessors, (1966), 907 states have return successors, (2012), 1960 states have call predecessors, (2012), 1964 states have call successors, (2012) [2021-12-14 17:42:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14099 states to 14099 states and 19390 transitions. [2021-12-14 17:42:14,375 INFO L78 Accepts]: Start accepts. Automaton has 14099 states and 19390 transitions. Word has length 140 [2021-12-14 17:42:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:14,375 INFO L470 AbstractCegarLoop]: Abstraction has 14099 states and 19390 transitions. [2021-12-14 17:42:14,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-14 17:42:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14099 states and 19390 transitions. [2021-12-14 17:42:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 17:42:14,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:14,387 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:14,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 17:42:14,388 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 935962192, now seen corresponding path program 1 times [2021-12-14 17:42:14,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224726771] [2021-12-14 17:42:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:14,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:42:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:42:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:42:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:42:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:42:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:42:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:42:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:42:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:42:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:42:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:42:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-14 17:42:14,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224726771] [2021-12-14 17:42:14,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224726771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:42:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073700816] [2021-12-14 17:42:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:14,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:14,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:42:14,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:42:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:42:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:42:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-14 17:42:15,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:42:15,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073700816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:15,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:42:15,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-14 17:42:15,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570038023] [2021-12-14 17:42:15,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:15,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:42:15,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:42:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:42:15,448 INFO L87 Difference]: Start difference. First operand 14099 states and 19390 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:42:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:16,666 INFO L93 Difference]: Finished difference Result 14099 states and 19390 transitions. [2021-12-14 17:42:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:42:16,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 144 [2021-12-14 17:42:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:16,668 INFO L225 Difference]: With dead ends: 14099 [2021-12-14 17:42:16,668 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 17:42:16,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:42:16,698 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1279 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:16,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 1197 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:42:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 17:42:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 17:42:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 17:42:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 17:42:16,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 144 [2021-12-14 17:42:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:16,701 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 17:42:16,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:42:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 17:42:16,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 17:42:16,703 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 17:42:16,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 17:42:16,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 17:42:16,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.