./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.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 fdbc5180119fad988a6a3a24d2f5ed804cbc2cd6d0e7bbb402b6d4dd37802e45 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-03 00:56:34,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 00:56:34,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 00:56:34,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 00:56:34,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 00:56:34,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 00:56:34,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 00:56:34,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 00:56:34,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 00:56:34,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 00:56:34,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 00:56:34,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 00:56:34,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 00:56:34,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 00:56:34,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 00:56:34,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 00:56:34,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 00:56:34,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 00:56:34,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 00:56:34,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 00:56:34,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 00:56:34,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 00:56:34,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 00:56:34,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 00:56:34,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 00:56:34,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 00:56:34,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 00:56:34,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 00:56:34,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 00:56:34,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 00:56:34,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 00:56:34,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 00:56:34,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 00:56:34,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 00:56:34,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 00:56:34,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 00:56:34,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 00:56:34,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 00:56:34,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 00:56:34,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 00:56:34,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 00:56:34,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-03 00:56:34,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 00:56:34,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 00:56:34,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-03 00:56:34,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-03 00:56:34,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 00:56:34,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 00:56:34,958 INFO L138 SettingsManager]: * Use SBE=true [2021-11-03 00:56:34,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 00:56:34,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 00:56:34,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 00:56:34,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 00:56:34,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 00:56:34,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 00:56:34,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 00:56:34,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 00:56:34,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 00:56:34,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 00:56:34,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 00:56:34,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 00:56:34,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 00:56:34,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 00:56:34,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 00:56:34,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 00:56:34,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-03 00:56:34,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 00:56:34,961 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-03 00:56:34,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-03 00:56:34,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 00:56:34,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 00:56:34,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdbc5180119fad988a6a3a24d2f5ed804cbc2cd6d0e7bbb402b6d4dd37802e45 [2021-11-03 00:56:35,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 00:56:35,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 00:56:35,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 00:56:35,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 00:56:35,186 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 00:56:35,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i [2021-11-03 00:56:35,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d8488f4/78469442266041f5b55a29be2efffe30/FLAGa1659f55a [2021-11-03 00:56:35,936 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 00:56:35,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i [2021-11-03 00:56:35,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d8488f4/78469442266041f5b55a29be2efffe30/FLAGa1659f55a [2021-11-03 00:56:36,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d8488f4/78469442266041f5b55a29be2efffe30 [2021-11-03 00:56:36,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 00:56:36,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 00:56:36,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 00:56:36,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 00:56:36,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 00:56:36,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 12:56:36" (1/1) ... [2021-11-03 00:56:36,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ebe8f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:36, skipping insertion in model container [2021-11-03 00:56:36,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 12:56:36" (1/1) ... [2021-11-03 00:56:36,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 00:56:36,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 00:56:39,002 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394320,394333] [2021-11-03 00:56:39,004 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394489,394502] [2021-11-03 00:56:39,005 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394656,394669] [2021-11-03 00:56:39,005 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394824,394837] [2021-11-03 00:56:39,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 00:56:39,035 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 00:56:39,654 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394320,394333] [2021-11-03 00:56:39,655 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394489,394502] [2021-11-03 00:56:39,655 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394656,394669] [2021-11-03 00:56:39,655 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-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i[394824,394837] [2021-11-03 00:56:39,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 00:56:39,840 INFO L208 MainTranslator]: Completed translation [2021-11-03 00:56:39,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39 WrapperNode [2021-11-03 00:56:39,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 00:56:39,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 00:56:39,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 00:56:39,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 00:56:39,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:39,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:46,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 00:56:46,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 00:56:46,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 00:56:46,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 00:56:46,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:46,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:47,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:47,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:49,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:49,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:50,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:50,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 00:56:50,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 00:56:50,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 00:56:50,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 00:56:50,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (1/1) ... [2021-11-03 00:56:50,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 00:56:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 00:56:50,927 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) [2021-11-03 00:56:50,960 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 [2021-11-03 00:56:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_running_reset [2021-11-03 00:56:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_running_reset [2021-11-03 00:56:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_reset [2021-11-03 00:56:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_reset [2021-11-03 00:56:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 00:56:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-03 00:56:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-03 00:56:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 00:56:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_ssi_set_status [2021-11-03 00:56:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_ssi_set_status [2021-11-03 00:56:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 00:56:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 00:56:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-03 00:56:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-03 00:56:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 00:56:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 00:56:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure lmc_driver_timeout [2021-11-03 00:56:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure lmc_driver_timeout [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 00:56:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 00:56:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-03 00:56:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-03 00:57:02,735 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-03 00:57:02,735 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#3: ldv_switch_1_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#2: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#3: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#4: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#5: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#6: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#7: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,736 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#8: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,737 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-03 00:57:02,737 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break: ldv_switch_2_#res := 0; [2021-11-03 00:57:02,745 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-03 00:57:02,745 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-03 00:57:02,746 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint lmc_trace_returnLabel#14: havoc lmc_proto_type_#t~mem1375.base, lmc_proto_type_#t~mem1375.offset; [2021-11-03 00:57:02,747 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint lmc_trace_returnLabel#10: havoc lmc_proto_type_#t~mem1375.base, lmc_proto_type_#t~mem1375.offset; [2021-11-03 00:57:02,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 00:57:02,818 INFO L299 CfgBuilder]: Removed 40678 assume(true) statements. [2021-11-03 00:57:02,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 12:57:02 BoogieIcfgContainer [2021-11-03 00:57:02,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 00:57:02,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 00:57:02,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 00:57:02,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 00:57:02,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 12:56:36" (1/3) ... [2021-11-03 00:57:02,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9443df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 12:57:02, skipping insertion in model container [2021-11-03 00:57:02,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:56:39" (2/3) ... [2021-11-03 00:57:02,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9443df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 12:57:02, skipping insertion in model container [2021-11-03 00:57:02,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 12:57:02" (3/3) ... [2021-11-03 00:57:02,847 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-lmc-lmc.cil.i [2021-11-03 00:57:02,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 00:57:02,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2021-11-03 00:57:03,178 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 00:57:03,183 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 [2021-11-03 00:57:03,183 INFO L340 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2021-11-03 00:57:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 31672 states, 31567 states have (on average 1.2488674881997022) internal successors, (39423), 31638 states have internal predecessors, (39423), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-03 00:57:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 00:57:03,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 00:57:03,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 00:57:03,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [lmc_driver_timeoutErr0ASSERT_VIOLATIONERROR_FUNCTION, lmc_driver_timeoutErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 65 more)] === [2021-11-03 00:57:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 00:57:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1944323651, now seen corresponding path program 1 times [2021-11-03 00:57:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 00:57:03,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657078793] [2021-11-03 00:57:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 00:57:03,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 00:57:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 00:57:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 00:57:04,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 00:57:04,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657078793] [2021-11-03 00:57:04,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657078793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 00:57:04,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 00:57:04,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 00:57:04,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211782559] [2021-11-03 00:57:04,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 00:57:04,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 00:57:04,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 00:57:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 00:57:04,204 INFO L87 Difference]: Start difference. First operand has 31672 states, 31567 states have (on average 1.2488674881997022) internal successors, (39423), 31638 states have internal predecessors, (39423), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-03 00:57:05,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 00:57:06,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 00:57:43,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 00:59:04,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 01:01:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 01:01:39,571 INFO L93 Difference]: Finished difference Result 93496 states and 116565 transitions. [2021-11-03 01:01:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 01:01:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-03 01:01:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 01:01:39,911 INFO L225 Difference]: With dead ends: 93496 [2021-11-03 01:01:39,911 INFO L226 Difference]: Without dead ends: 61661 [2021-11-03 01:01:40,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.36ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 01:01:40,049 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 37752 mSDsluCounter, 39355 mSDsCounter, 0 mSdLazyCounter, 78298 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207777.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37752 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 78308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 309.46ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 268999.47ms IncrementalHoareTripleChecker+Time [2021-11-03 01:01:40,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37752 Valid, 527 Invalid, 78308 Unknown, 0 Unchecked, 309.46ms Time], IncrementalHoareTripleChecker [9 Valid, 78298 Invalid, 1 Unknown, 0 Unchecked, 268999.47ms Time] [2021-11-03 01:01:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61661 states. [2021-11-03 01:01:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61661 to 61599. [2021-11-03 01:01:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61599 states, 61460 states have (on average 1.2423690205011388) internal successors, (76356), 61535 states have internal predecessors, (76356), 59 states have call successors, (59), 12 states have call predecessors, (59), 12 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-11-03 01:01:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61599 states to 61599 states and 76474 transitions. [2021-11-03 01:01:42,480 INFO L78 Accepts]: Start accepts. Automaton has 61599 states and 76474 transitions. Word has length 63 [2021-11-03 01:01:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 01:01:42,483 INFO L470 AbstractCegarLoop]: Abstraction has 61599 states and 76474 transitions. [2021-11-03 01:01:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-03 01:01:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 61599 states and 76474 transitions. [2021-11-03 01:01:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 01:01:42,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 01:01:42,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 01:01:42,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 01:01:42,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONERROR_FUNCTION === [lmc_driver_timeoutErr0ASSERT_VIOLATIONERROR_FUNCTION, lmc_driver_timeoutErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 65 more)] === [2021-11-03 01:01:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 01:01:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -691082562, now seen corresponding path program 1 times [2021-11-03 01:01:42,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 01:01:42,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840411722] [2021-11-03 01:01:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 01:01:42,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 01:01:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 01:01:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 01:01:42,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 01:01:42,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840411722] [2021-11-03 01:01:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840411722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 01:01:42,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 01:01:42,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 01:01:42,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030868190] [2021-11-03 01:01:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 01:01:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 01:01:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 01:01:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 01:01:42,829 INFO L87 Difference]: Start difference. First operand 61599 states and 76474 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-03 01:01:44,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15