./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.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 05e3ebea4820703b3259b4b6dd440513670562ea5166f99f8e3aabd0be2e3f32 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 20:39:34,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 20:39:34,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 20:39:34,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 20:39:34,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 20:39:34,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 20:39:34,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 20:39:34,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 20:39:34,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 20:39:34,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 20:39:34,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 20:39:34,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 20:39:34,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 20:39:34,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 20:39:34,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 20:39:34,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 20:39:34,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 20:39:34,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 20:39:34,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 20:39:34,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 20:39:34,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 20:39:34,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 20:39:34,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 20:39:34,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 20:39:34,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 20:39:34,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 20:39:34,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 20:39:34,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 20:39:34,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 20:39:34,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 20:39:34,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 20:39:34,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 20:39:34,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 20:39:34,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 20:39:34,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 20:39:34,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 20:39:34,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 20:39:34,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 20:39:34,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 20:39:34,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 20:39:34,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 20:39:34,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 20:39:34,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 20:39:34,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 20:39:34,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 20:39:34,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 20:39:34,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 20:39:34,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 20:39:34,949 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 20:39:34,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 20:39:34,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 20:39:34,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 20:39:34,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 20:39:34,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 20:39:34,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 20:39:34,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 20:39:34,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 20:39:34,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 20:39:34,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 20:39:34,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 20:39:34,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 20:39:34,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:39:34,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 20:39:34,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 20:39:34,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 20:39:34,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 20:39:34,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 20:39:34,954 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 20:39:34,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 20:39:34,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 20:39:34,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 20:39:34,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05e3ebea4820703b3259b4b6dd440513670562ea5166f99f8e3aabd0be2e3f32 [2021-11-06 20:39:35,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 20:39:35,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 20:39:35,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 20:39:35,225 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 20:39:35,226 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 20:39:35,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i [2021-11-06 20:39:35,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/651fd3213/5971fbed4004410cbe3c153bb5301234/FLAG8ec84fde9 [2021-11-06 20:39:36,005 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 20:39:36,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i [2021-11-06 20:39:36,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/651fd3213/5971fbed4004410cbe3c153bb5301234/FLAG8ec84fde9 [2021-11-06 20:39:36,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/651fd3213/5971fbed4004410cbe3c153bb5301234 [2021-11-06 20:39:36,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 20:39:36,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 20:39:36,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 20:39:36,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 20:39:36,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 20:39:36,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:39:36" (1/1) ... [2021-11-06 20:39:36,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ced0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:36, skipping insertion in model container [2021-11-06 20:39:36,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:39:36" (1/1) ... [2021-11-06 20:39:36,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 20:39:36,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 20:39:40,217 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460236,460249] [2021-11-06 20:39:40,220 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460405,460418] [2021-11-06 20:39:40,221 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460572,460585] [2021-11-06 20:39:40,221 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460740,460753] [2021-11-06 20:39:40,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:39:40,321 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 20:39:40,705 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460236,460249] [2021-11-06 20:39:40,706 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460405,460418] [2021-11-06 20:39:40,706 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460572,460585] [2021-11-06 20:39:40,707 WARN L228 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i[460740,460753] [2021-11-06 20:39:40,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:39:41,026 INFO L208 MainTranslator]: Completed translation [2021-11-06 20:39:41,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41 WrapperNode [2021-11-06 20:39:41,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 20:39:41,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 20:39:41,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 20:39:41,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 20:39:41,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:41,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:52,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 20:39:52,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 20:39:52,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 20:39:52,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 20:39:52,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:52,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:54,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:54,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:57,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:58,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:39:59,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:40:00,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 20:40:00,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 20:40:00,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 20:40:00,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 20:40:00,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (1/1) ... [2021-11-06 20:40:00,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:40:00,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 20:40:00,271 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) [2021-11-06 20:40:00,273 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 [2021-11-06 20:40:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_unaligned_access_size [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 20:40:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 20:40:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 20:40:00,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 20:40:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 20:40:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 20:40:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-06 20:40:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 20:40:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 20:40:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 20:40:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 20:40:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 20:41:29,754 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#2: ldv_switch_2_#res := 0; [2021-11-06 20:41:29,754 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#3: ldv_switch_2_#res := 0; [2021-11-06 20:41:29,754 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#4: ldv_switch_2_#res := 0; [2021-11-06 20:41:29,756 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_4_switch_break#2: ldv_switch_4_#res := 0; [2021-11-06 20:41:29,757 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break: ldv_switch_2_#res := 0; [2021-11-06 20:41:29,761 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-06 20:41:29,761 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_3_switch_break: ldv_switch_3_#res := 0; [2021-11-06 20:41:29,761 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-06 20:41:29,762 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#3: ldv_switch_1_#res := 0; [2021-11-06 20:41:29,762 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-06 20:41:29,764 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-06 20:41:29,784 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_4_switch_break: ldv_switch_4_#res := 0; [2021-11-06 20:41:29,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 20:41:29,932 INFO L299 CfgBuilder]: Removed 87792 assume(true) statements. [2021-11-06 20:41:29,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:41:29 BoogieIcfgContainer [2021-11-06 20:41:29,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 20:41:29,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 20:41:29,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 20:41:29,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 20:41:29,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:39:36" (1/3) ... [2021-11-06 20:41:29,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f393582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:41:29, skipping insertion in model container [2021-11-06 20:41:29,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:39:41" (2/3) ... [2021-11-06 20:41:29,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f393582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:41:29, skipping insertion in model container [2021-11-06 20:41:29,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:41:29" (3/3) ... [2021-11-06 20:41:29,998 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-alx-alx.cil.i [2021-11-06 20:41:30,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 20:41:30,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1281 error locations. [2021-11-06 20:41:30,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 20:41:30,187 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 20:41:30,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1281 error locations. [2021-11-06 20:41:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 67308 states, 66027 states have (on average 1.2818695382192133) internal successors, (84638), 67307 states have internal predecessors, (84638), 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) [2021-11-06 20:41:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 20:41:30,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:41:30,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 20:41:30,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1278 more)] === [2021-11-06 20:41:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:41:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1586885002, now seen corresponding path program 1 times [2021-11-06 20:41:30,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:41:30,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779125656] [2021-11-06 20:41:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:41:30,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:41:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:41:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:41:31,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:41:31,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779125656] [2021-11-06 20:41:31,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779125656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:41:31,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:41:31,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:41:31,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122441043] [2021-11-06 20:41:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:41:31,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:41:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:41:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:41:32,017 INFO L87 Difference]: Start difference. First operand has 67308 states, 66027 states have (on average 1.2818695382192133) internal successors, (84638), 67307 states have internal predecessors, (84638), 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) Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-06 20:41:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:41:36,819 INFO L93 Difference]: Finished difference Result 199115 states and 249509 transitions. [2021-11-06 20:41:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:41:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) Word has length 66 [2021-11-06 20:41:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:41:37,282 INFO L225 Difference]: With dead ends: 199115 [2021-11-06 20:41:37,283 INFO L226 Difference]: Without dead ends: 127931 [2021-11-06 20:41:37,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:41:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127931 states. [2021-11-06 20:41:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127931 to 125257. [2021-11-06 20:41:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125257 states, 123976 states have (on average 1.2201635800477513) internal successors, (151271), 125256 states have internal predecessors, (151271), 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) [2021-11-06 20:41:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125257 states to 125257 states and 151271 transitions. [2021-11-06 20:41:41,276 INFO L78 Accepts]: Start accepts. Automaton has 125257 states and 151271 transitions. Word has length 66 [2021-11-06 20:41:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:41:41,277 INFO L470 AbstractCegarLoop]: Abstraction has 125257 states and 151271 transitions. [2021-11-06 20:41:41,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-06 20:41:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 125257 states and 151271 transitions. [2021-11-06 20:41:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 20:41:41,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:41:41,283 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 20:41:41,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 20:41:41,283 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1278 more)] === [2021-11-06 20:41:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:41:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash -23353293, now seen corresponding path program 1 times [2021-11-06 20:41:41,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:41:41,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18933357] [2021-11-06 20:41:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:41:41,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:41:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:41:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:41:42,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:41:42,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18933357] [2021-11-06 20:41:42,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18933357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:41:42,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:41:42,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:41:42,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464259728] [2021-11-06 20:41:42,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:41:42,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:41:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:41:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:41:42,102 INFO L87 Difference]: Start difference. First operand 125257 states and 151271 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-06 20:41:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:41:46,866 INFO L93 Difference]: Finished difference Result 372031 states and 449301 transitions. [2021-11-06 20:41:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:41:46,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) Word has length 66 [2021-11-06 20:41:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:41:47,525 INFO L225 Difference]: With dead ends: 372031 [2021-11-06 20:41:47,526 INFO L226 Difference]: Without dead ends: 246906 [2021-11-06 20:41:47,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:41:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246906 states. [2021-11-06 20:41:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246906 to 242368. [2021-11-06 20:41:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242368 states, 241087 states have (on average 1.2212811142865438) internal successors, (294435), 242367 states have internal predecessors, (294435), 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) [2021-11-06 20:41:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242368 states to 242368 states and 294435 transitions. [2021-11-06 20:41:53,848 INFO L78 Accepts]: Start accepts. Automaton has 242368 states and 294435 transitions. Word has length 66 [2021-11-06 20:41:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:41:53,849 INFO L470 AbstractCegarLoop]: Abstraction has 242368 states and 294435 transitions. [2021-11-06 20:41:53,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-06 20:41:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 242368 states and 294435 transitions. [2021-11-06 20:41:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 20:41:53,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:41:53,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 20:41:53,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 20:41:53,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1278 more)] === [2021-11-06 20:41:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:41:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash -746839052, now seen corresponding path program 1 times [2021-11-06 20:41:53,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:41:53,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612310693] [2021-11-06 20:41:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:41:53,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:41:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:41:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:41:54,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:41:54,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612310693] [2021-11-06 20:41:54,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612310693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:41:54,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:41:54,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:41:54,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164385715] [2021-11-06 20:41:54,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:41:54,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:41:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:41:54,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:41:54,082 INFO L87 Difference]: Start difference. First operand 242368 states and 294435 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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)