./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-32_7a-drivers--net--wireless--p54--p54usb.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-32_7a-drivers--net--wireless--p54--p54usb.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 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 15:03:49,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 15:03:49,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 15:03:49,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 15:03:49,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 15:03:49,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 15:03:49,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 15:03:49,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 15:03:49,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 15:03:49,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 15:03:49,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 15:03:49,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 15:03:49,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 15:03:49,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 15:03:49,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 15:03:49,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 15:03:49,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 15:03:49,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 15:03:49,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 15:03:49,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 15:03:49,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 15:03:49,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 15:03:49,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 15:03:49,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 15:03:49,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 15:03:49,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 15:03:49,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 15:03:49,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 15:03:49,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 15:03:49,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 15:03:49,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 15:03:49,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 15:03:49,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 15:03:49,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 15:03:49,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 15:03:49,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 15:03:49,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 15:03:49,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 15:03:49,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 15:03:49,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 15:03:49,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 15:03:49,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 15:03:49,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 15:03:49,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 15:03:49,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 15:03:49,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 15:03:49,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 15:03:49,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 15:03:49,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 15:03:49,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 15:03:49,949 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 15:03:49,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 15:03:49,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 15:03:49,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 15:03:49,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 15:03:49,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 15:03:49,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 15:03:49,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 15:03:49,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 15:03:49,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 15:03:49,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 15:03:49,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 15:03:49,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 15:03:49,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 15:03:49,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 15:03:49,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 15:03:49,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 15:03:49,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 15:03:49,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 15:03:49,953 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 15:03:49,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 15:03:49,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 15:03:49,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 15:03:49,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2021-12-22 15:03:50,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 15:03:50,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 15:03:50,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 15:03:50,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 15:03:50,192 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 15:03:50,194 INFO L432 ainManager$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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-22 15:03:50,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec215388d/cb60b9398b1f41b28445741f6113081a/FLAGfff784c36 [2021-12-22 15:03:50,953 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 15:03:50,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-22 15:03:50,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec215388d/cb60b9398b1f41b28445741f6113081a/FLAGfff784c36 [2021-12-22 15:03:51,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec215388d/cb60b9398b1f41b28445741f6113081a [2021-12-22 15:03:51,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 15:03:51,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 15:03:51,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 15:03:51,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 15:03:51,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 15:03:51,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:03:51" (1/1) ... [2021-12-22 15:03:51,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656731a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:51, skipping insertion in model container [2021-12-22 15:03:51,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:03:51" (1/1) ... [2021-12-22 15:03:51,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 15:03:51,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 15:03:52,933 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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-12-22 15:03:53,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 15:03:53,269 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 15:03:53,548 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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-12-22 15:03:53,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 15:03:53,670 INFO L208 MainTranslator]: Completed translation [2021-12-22 15:03:53,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53 WrapperNode [2021-12-22 15:03:53,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 15:03:53,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 15:03:53,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 15:03:53,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 15:03:53,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:53,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:53,888 INFO L137 Inliner]: procedures = 217, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3526 [2021-12-22 15:03:53,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 15:03:53,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 15:03:53,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 15:03:53,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 15:03:53,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:53,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:53,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:53,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:54,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:54,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:54,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:54,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 15:03:54,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 15:03:54,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 15:03:54,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 15:03:54,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (1/1) ... [2021-12-22 15:03:54,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 15:03:54,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 15:03:54,205 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 15:03:54,231 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 15:03:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-22 15:03:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-22 15:03:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-22 15:03:54,254 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-22 15:03:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 15:03:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 15:03:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 15:03:54,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 15:03:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-22 15:03:54,255 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-22 15:03:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-12-22 15:03:54,255 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-12-22 15:03:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-12-22 15:03:54,255 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-12-22 15:03:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2021-12-22 15:03:54,256 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2021-12-22 15:03:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-12-22 15:03:54,256 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-12-22 15:03:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 15:03:54,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 15:03:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-22 15:03:54,257 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-22 15:03:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 15:03:54,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 15:03:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 15:03:54,257 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 15:03:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 15:03:54,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 15:03:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-12-22 15:03:54,258 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-12-22 15:03:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 15:03:54,258 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 15:03:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 15:03:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 15:03:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 15:03:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-12-22 15:03:54,259 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-12-22 15:03:54,259 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-22 15:03:54,259 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-22 15:03:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 15:03:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 15:03:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-12-22 15:03:54,260 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-12-22 15:03:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-22 15:03:54,260 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-22 15:03:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-22 15:03:54,260 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-22 15:03:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-12-22 15:03:54,261 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-12-22 15:03:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-22 15:03:54,261 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-22 15:03:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 15:03:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-22 15:03:54,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-22 15:03:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-12-22 15:03:54,262 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-12-22 15:03:54,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 15:03:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-22 15:03:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-22 15:03:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 15:03:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-12-22 15:03:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-12-22 15:03:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 15:03:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 15:03:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 15:03:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 15:03:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 15:03:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 15:03:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-12-22 15:03:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-12-22 15:03:54,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 15:03:54,266 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-12-22 15:03:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-12-22 15:03:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 15:03:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 15:03:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-22 15:03:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-22 15:03:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 15:03:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 15:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-12-22 15:03:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-12-22 15:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-12-22 15:03:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-12-22 15:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-22 15:03:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-22 15:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-22 15:03:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-22 15:03:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 15:03:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-22 15:03:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-22 15:03:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-12-22 15:03:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-12-22 15:03:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-22 15:03:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-22 15:03:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-22 15:03:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-22 15:03:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-22 15:03:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-22 15:03:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-12-22 15:03:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-12-22 15:03:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-12-22 15:03:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-12-22 15:03:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-12-22 15:03:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-12-22 15:03:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-12-22 15:03:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-12-22 15:03:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-22 15:03:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-22 15:03:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 15:03:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-22 15:03:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-22 15:03:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-12-22 15:03:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-12-22 15:03:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 15:03:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 15:03:54,681 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 15:03:54,683 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 15:03:54,908 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 15:04:31,093 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 15:04:31,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 15:04:31,122 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 15:04:31,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:04:31 BoogieIcfgContainer [2021-12-22 15:04:31,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 15:04:31,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 15:04:31,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 15:04:31,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 15:04:31,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:03:51" (1/3) ... [2021-12-22 15:04:31,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5def1051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:04:31, skipping insertion in model container [2021-12-22 15:04:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:53" (2/3) ... [2021-12-22 15:04:31,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5def1051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:04:31, skipping insertion in model container [2021-12-22 15:04:31,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:04:31" (3/3) ... [2021-12-22 15:04:31,140 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-22 15:04:31,145 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 15:04:31,146 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 15:04:31,203 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 15:04:31,214 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 15:04:31,215 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 15:04:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2021-12-22 15:04:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 15:04:31,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 15:04:31,265 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] [2021-12-22 15:04:31,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 15:04:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 15:04:31,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2021-12-22 15:04:31,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 15:04:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132783131] [2021-12-22 15:04:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 15:04:31,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 15:04:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 15:04:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:32,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:04:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:04:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 15:04:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 15:04:32,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 15:04:32,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132783131] [2021-12-22 15:04:32,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132783131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 15:04:32,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 15:04:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 15:04:32,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710905009] [2021-12-22 15:04:32,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 15:04:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 15:04:32,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 15:04:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 15:04:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 15:04:32,307 INFO L87 Difference]: Start difference. First operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 15:04:34,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:04:36,401 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 15:04:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 15:04:37,919 INFO L93 Difference]: Finished difference Result 1558 states and 2209 transitions. [2021-12-22 15:04:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 15:04:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-12-22 15:04:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 15:04:37,937 INFO L225 Difference]: With dead ends: 1558 [2021-12-22 15:04:37,937 INFO L226 Difference]: Without dead ends: 823 [2021-12-22 15:04:37,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 15:04:37,949 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 471 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 445 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-22 15:04:37,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1997 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-12-22 15:04:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-22 15:04:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2021-12-22 15:04:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 529 states have internal predecessors, (682), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-22 15:04:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2021-12-22 15:04:38,088 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2021-12-22 15:04:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 15:04:38,089 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2021-12-22 15:04:38,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 15:04:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2021-12-22 15:04:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 15:04:38,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 15:04:38,096 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] [2021-12-22 15:04:38,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 15:04:38,097 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 15:04:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 15:04:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2021-12-22 15:04:38,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 15:04:38,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181567601] [2021-12-22 15:04:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 15:04:38,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 15:04:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 15:04:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:38,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:04:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:04:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 15:04:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 15:04:38,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 15:04:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181567601] [2021-12-22 15:04:38,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181567601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 15:04:38,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 15:04:38,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 15:04:38,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127807754] [2021-12-22 15:04:38,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 15:04:38,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 15:04:38,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 15:04:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 15:04:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 15:04:38,670 INFO L87 Difference]: Start difference. First operand 718 states and 994 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 15:04:40,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:04:42,738 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 15:04:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 15:04:45,278 INFO L93 Difference]: Finished difference Result 2329 states and 3239 transitions. [2021-12-22 15:04:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 15:04:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-12-22 15:04:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 15:04:45,289 INFO L225 Difference]: With dead ends: 2329 [2021-12-22 15:04:45,290 INFO L226 Difference]: Without dead ends: 1619 [2021-12-22 15:04:45,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-22 15:04:45,297 INFO L933 BasicCegarLoop]: 1067 mSDtfsCounter, 1820 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 1003 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1912 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-22 15:04:45,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1912 Valid, 3021 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 899 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-22 15:04:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-12-22 15:04:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1405. [2021-12-22 15:04:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3346653346653348) internal successors, (1336), 1032 states have internal predecessors, (1336), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-12-22 15:04:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1948 transitions. [2021-12-22 15:04:45,411 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1948 transitions. Word has length 39 [2021-12-22 15:04:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 15:04:45,412 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1948 transitions. [2021-12-22 15:04:45,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 15:04:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1948 transitions. [2021-12-22 15:04:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 15:04:45,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 15:04:45,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 15:04:45,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 15:04:45,425 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 15:04:45,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 15:04:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash 950658258, now seen corresponding path program 1 times [2021-12-22 15:04:45,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 15:04:45,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373731135] [2021-12-22 15:04:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 15:04:45,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 15:04:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:45,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 15:04:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:04:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:45,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:04:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 15:04:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:46,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 15:04:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:46,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:04:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:04:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 15:04:46,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 15:04:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373731135] [2021-12-22 15:04:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373731135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 15:04:46,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 15:04:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 15:04:46,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457674239] [2021-12-22 15:04:46,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 15:04:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 15:04:46,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 15:04:46,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 15:04:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 15:04:46,058 INFO L87 Difference]: Start difference. First operand 1405 states and 1948 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 15:04:48,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:04:50,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 15:04:52,144 WARN L534 Checker$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 15:04:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 15:04:53,725 INFO L93 Difference]: Finished difference Result 1637 states and 2275 transitions. [2021-12-22 15:04:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 15:04:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-22 15:04:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 15:04:53,736 INFO L225 Difference]: With dead ends: 1637 [2021-12-22 15:04:53,736 INFO L226 Difference]: Without dead ends: 1626 [2021-12-22 15:04:53,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-22 15:04:53,739 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 1335 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 547 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-22 15:04:53,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 2478 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 606 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2021-12-22 15:04:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-22 15:04:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1405. [2021-12-22 15:04:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3336663336663337) internal successors, (1335), 1032 states have internal predecessors, (1335), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-12-22 15:04:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1947 transitions. [2021-12-22 15:04:53,804 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1947 transitions. Word has length 59 [2021-12-22 15:04:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 15:04:53,805 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1947 transitions. [2021-12-22 15:04:53,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 15:04:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1947 transitions. [2021-12-22 15:04:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 15:04:53,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 15:04:53,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 15:04:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 15:04:53,808 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 15:04:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 15:04:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916560, now seen corresponding path program 1 times [2021-12-22 15:04:53,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 15:04:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748587721] [2021-12-22 15:04:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 15:04:53,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 15:04:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 15:04:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:04:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:04:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 15:04:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 15:04:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 15:04:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 15:04:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 15:04:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 15:04:54,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 15:04:54,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748587721] [2021-12-22 15:04:54,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748587721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 15:04:54,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 15:04:54,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 15:04:54,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228219745] [2021-12-22 15:04:54,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 15:04:54,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 15:04:54,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 15:04:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 15:04:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 15:04:54,368 INFO L87 Difference]: Start difference. First operand 1405 states and 1947 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)