./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.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 e8e67529e4f1862dffb4b20b34b9723f96164119a4ebff5a58d56eaf6134a8d1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 15:13:30,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 15:13:30,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 15:13:30,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 15:13:30,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 15:13:30,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 15:13:30,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 15:13:30,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 15:13:30,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 15:13:30,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 15:13:30,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 15:13:30,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 15:13:30,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 15:13:30,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 15:13:30,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 15:13:30,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 15:13:30,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 15:13:30,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 15:13:30,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 15:13:30,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 15:13:30,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 15:13:30,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 15:13:30,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 15:13:30,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 15:13:30,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 15:13:30,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 15:13:30,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 15:13:30,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 15:13:30,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 15:13:30,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 15:13:30,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 15:13:30,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 15:13:30,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 15:13:30,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 15:13:30,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 15:13:30,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 15:13:30,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 15:13:30,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 15:13:30,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 15:13:30,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 15:13:30,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 15:13:30,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 15:13:30,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 15:13:30,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 15:13:30,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 15:13:30,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 15:13:30,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 15:13:30,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 15:13:30,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 15:13:30,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 15:13:30,401 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 15:13:30,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 15:13:30,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 15:13:30,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 15:13:30,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 15:13:30,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 15:13:30,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 15:13:30,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 15:13:30,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 15:13:30,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 15:13:30,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 15:13:30,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8e67529e4f1862dffb4b20b34b9723f96164119a4ebff5a58d56eaf6134a8d1 [2021-12-22 15:13:30,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 15:13:30,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 15:13:30,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 15:13:30,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 15:13:30,619 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 15:13:30,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.ko-entry_point.cil.out.i [2021-12-22 15:13:30,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2292b0e/fedc19e7701f412f8b2d2ed936a8b540/FLAG22242e761 [2021-12-22 15:13:31,316 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 15:13:31,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.ko-entry_point.cil.out.i [2021-12-22 15:13:31,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2292b0e/fedc19e7701f412f8b2d2ed936a8b540/FLAG22242e761 [2021-12-22 15:13:31,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2292b0e/fedc19e7701f412f8b2d2ed936a8b540 [2021-12-22 15:13:31,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 15:13:31,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 15:13:31,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 15:13:31,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 15:13:31,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 15:13:31,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:13:31" (1/1) ... [2021-12-22 15:13:31,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ac1022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:31, skipping insertion in model container [2021-12-22 15:13:31,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:13:31" (1/1) ... [2021-12-22 15:13:31,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 15:13:31,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 15:13:33,058 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.ko-entry_point.cil.out.i[283284,283297] [2021-12-22 15:13:33,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 15:13:33,132 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 15:13:33,415 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.ko-entry_point.cil.out.i[283284,283297] [2021-12-22 15:13:33,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 15:13:33,503 INFO L208 MainTranslator]: Completed translation [2021-12-22 15:13:33,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33 WrapperNode [2021-12-22 15:13:33,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 15:13:33,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 15:13:33,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 15:13:33,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 15:13:33,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,679 INFO L137 Inliner]: procedures = 215, calls = 1656, calls flagged for inlining = 108, calls inlined = 105, statements flattened = 3102 [2021-12-22 15:13:33,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 15:13:33,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 15:13:33,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 15:13:33,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 15:13:33,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 15:13:33,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 15:13:33,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 15:13:33,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 15:13:33,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (1/1) ... [2021-12-22 15:13:33,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 15:13:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 15:13:33,917 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) [2021-12-22 15:13:33,932 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 [2021-12-22 15:13:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 15:13:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 15:13:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 15:13:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 15:13:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-22 15:13:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-22 15:13:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-12-22 15:13:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-12-22 15:13:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-12-22 15:13:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-12-22 15:13:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-12-22 15:13:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-12-22 15:13:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 15:13:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 15:13:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-12-22 15:13:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-12-22 15:13:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 15:13:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 15:13:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-12-22 15:13:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-12-22 15:13:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 15:13:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 15:13:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 15:13:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 15:13:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-22 15:13:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-22 15:13:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-12-22 15:13:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-12-22 15:13:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-12-22 15:13:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-12-22 15:13:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 15:13:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_port_read_long [2021-12-22 15:13:33,963 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_port_read_long [2021-12-22 15:13:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 15:13:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-12-22 15:13:33,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-12-22 15:13:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 15:13:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 15:13:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 15:13:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-12-22 15:13:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-12-22 15:13:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 15:13:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_adap_init [2021-12-22 15:13:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_adap_init [2021-12-22 15:13:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-12-22 15:13:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-12-22 15:13:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-22 15:13:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-22 15:13:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_int_common [2021-12-22 15:13:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_int_common [2021-12-22 15:13:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-22 15:13:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-22 15:13:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-12-22 15:13:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-12-22 15:13:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-22 15:13:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-22 15:13:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_rcv_flush [2021-12-22 15:13:33,967 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_rcv_flush [2021-12-22 15:13:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_ctl_get_stats [2021-12-22 15:13:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_ctl_get_stats [2021-12-22 15:13:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-22 15:13:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-22 15:13:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_ctl_update_cam [2021-12-22 15:13:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_ctl_update_cam [2021-12-22 15:13:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 15:13:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_hw_dma_cmd_req [2021-12-22 15:13:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_hw_dma_cmd_req [2021-12-22 15:13:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_hw_dma_uninit [2021-12-22 15:13:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_hw_dma_uninit [2021-12-22 15:13:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-12-22 15:13:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-12-22 15:13:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 15:13:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-12-22 15:13:33,970 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-12-22 15:13:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure dma_sync_single_for_cpu [2021-12-22 15:13:33,970 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_sync_single_for_cpu [2021-12-22 15:13:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-12-22 15:13:33,971 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-12-22 15:13:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 15:13:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure my_skb_align [2021-12-22 15:13:33,971 INFO L138 BoogieDeclarations]: Found implementation of procedure my_skb_align [2021-12-22 15:13:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-12-22 15:13:33,971 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-12-22 15:13:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-12-22 15:13:33,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-12-22 15:13:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 15:13:33,972 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 15:13:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_port_write_long [2021-12-22 15:13:33,972 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_port_write_long [2021-12-22 15:13:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-22 15:13:33,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-22 15:13:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-12-22 15:13:33,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-12-22 15:13:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 15:13:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-12-22 15:13:33,973 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-12-22 15:13:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-12-22 15:13:33,974 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-12-22 15:13:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-22 15:13:33,974 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-22 15:13:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 15:13:33,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 15:13:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-22 15:13:33,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-22 15:13:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 15:13:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-12-22 15:13:33,975 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-12-22 15:13:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_hw_port_ctrl_req [2021-12-22 15:13:33,975 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_hw_port_ctrl_req [2021-12-22 15:13:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 15:13:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_xmt_flush [2021-12-22 15:13:33,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_xmt_flush [2021-12-22 15:13:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-22 15:13:33,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-22 15:13:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 15:13:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_ctl_update_filters [2021-12-22 15:13:33,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_ctl_update_filters [2021-12-22 15:13:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-12-22 15:13:33,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-12-22 15:13:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_ctl_set_mac_address [2021-12-22 15:13:33,979 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_ctl_set_mac_address [2021-12-22 15:13:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_ctl_set_multicast_list [2021-12-22 15:13:33,979 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_ctl_set_multicast_list [2021-12-22 15:13:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_hw_adap_state_rd [2021-12-22 15:13:33,981 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_hw_adap_state_rd [2021-12-22 15:13:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-22 15:13:33,981 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-22 15:13:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-12-22 15:13:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-12-22 15:13:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 15:13:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure dfx_get_bars [2021-12-22 15:13:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure dfx_get_bars [2021-12-22 15:13:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-12-22 15:13:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-12-22 15:13:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 15:13:33,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 15:13:34,477 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 15:13:34,480 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 15:13:34,999 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 15:13:44,496 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 15:13:44,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 15:13:44,507 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 15:13:44,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:13:44 BoogieIcfgContainer [2021-12-22 15:13:44,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 15:13:44,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 15:13:44,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 15:13:44,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 15:13:44,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:13:31" (1/3) ... [2021-12-22 15:13:44,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e941709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:13:44, skipping insertion in model container [2021-12-22 15:13:44,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:13:33" (2/3) ... [2021-12-22 15:13:44,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e941709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:13:44, skipping insertion in model container [2021-12-22 15:13:44,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:13:44" (3/3) ... [2021-12-22 15:13:44,515 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--fddi--defxx.ko-entry_point.cil.out.i [2021-12-22 15:13:44,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 15:13:44,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 15:13:44,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 15:13:44,564 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 [2021-12-22 15:13:44,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 15:13:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 1115 states, 780 states have (on average 1.3205128205128205) internal successors, (1030), 801 states have internal predecessors, (1030), 274 states have call successors, (274), 60 states have call predecessors, (274), 59 states have return successors, (268), 268 states have call predecessors, (268), 268 states have call successors, (268) [2021-12-22 15:13:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 15:13:44,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 15:13:44,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 15:13:44,640 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 15:13:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 15:13:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1612545232, now seen corresponding path program 1 times [2021-12-22 15:13:44,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 15:13:44,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745506962] [2021-12-22 15:13:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 15:13:44,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 15:13:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 15:13:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:13:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:13:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 15:13:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:13:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:13:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 15:13:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:13:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:13:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 15:13:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 15:13:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 15:13:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:13:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 15:13:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 15:13:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 15:13:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:13:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:13:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 15:13:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 15:13:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-22 15:13:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:13:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 15:13:45,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 15:13:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745506962] [2021-12-22 15:13:45,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745506962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 15:13:45,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 15:13:45,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 15:13:45,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952272094] [2021-12-22 15:13:45,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 15:13:45,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 15:13:45,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 15:13:45,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 15:13:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 15:13:45,376 INFO L87 Difference]: Start difference. First operand has 1115 states, 780 states have (on average 1.3205128205128205) internal successors, (1030), 801 states have internal predecessors, (1030), 274 states have call successors, (274), 60 states have call predecessors, (274), 59 states have return successors, (268), 268 states have call predecessors, (268), 268 states have call successors, (268) Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 7 states have call predecessors, (22), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-22 15:13:51,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:13:55,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:13:57,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:13:59,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:01,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:03,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:05,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:07,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:11,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:17,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:19,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:21,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:23,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:25,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:28,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:30,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:33,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 15:14:35,641 INFO L93 Difference]: Finished difference Result 3602 states and 5282 transitions. [2021-12-22 15:14:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 15:14:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 7 states have call predecessors, (22), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 153 [2021-12-22 15:14:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 15:14:35,686 INFO L225 Difference]: With dead ends: 3602 [2021-12-22 15:14:35,686 INFO L226 Difference]: Without dead ends: 2450 [2021-12-22 15:14:35,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-12-22 15:14:35,706 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 3922 mSDsluCounter, 4015 mSDsCounter, 0 mSdLazyCounter, 4449 mSolverCounterSat, 3326 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 5661 SdHoareTripleChecker+Invalid, 7789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3326 IncrementalHoareTripleChecker+Valid, 4449 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.6s IncrementalHoareTripleChecker+Time [2021-12-22 15:14:35,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4192 Valid, 5661 Invalid, 7789 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3326 Valid, 4449 Invalid, 14 Unknown, 0 Unchecked, 49.6s Time] [2021-12-22 15:14:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-12-22 15:14:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2177. [2021-12-22 15:14:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1527 states have (on average 1.3077930582842174) internal successors, (1997), 1553 states have internal predecessors, (1997), 532 states have call successors, (532), 118 states have call predecessors, (532), 117 states have return successors, (533), 531 states have call predecessors, (533), 531 states have call successors, (533) [2021-12-22 15:14:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3062 transitions. [2021-12-22 15:14:35,880 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3062 transitions. Word has length 153 [2021-12-22 15:14:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 15:14:35,881 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 3062 transitions. [2021-12-22 15:14:35,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 7 states have call predecessors, (22), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-22 15:14:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3062 transitions. [2021-12-22 15:14:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-22 15:14:35,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 15:14:35,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 15:14:35,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 15:14:35,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 15:14:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 15:14:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1282953709, now seen corresponding path program 1 times [2021-12-22 15:14:35,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 15:14:35,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458250807] [2021-12-22 15:14:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 15:14:35,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 15:14:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 15:14:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:14:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:14:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 15:14:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:14:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:14:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 15:14:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:14:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:14:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 15:14:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 15:14:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 15:14:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:14:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 15:14:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 15:14:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-22 15:14:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:14:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:14:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 15:14:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 15:14:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 15:14:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:14:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 15:14:36,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 15:14:36,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458250807] [2021-12-22 15:14:36,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458250807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 15:14:36,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 15:14:36,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 15:14:36,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876784400] [2021-12-22 15:14:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 15:14:36,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 15:14:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 15:14:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 15:14:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 15:14:36,247 INFO L87 Difference]: Start difference. First operand 2177 states and 3062 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (22), 7 states have call predecessors, (22), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-22 15:14:38,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:14:40,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []