./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.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 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:36:22,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:36:22,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:36:22,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:36:22,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:36:22,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:36:22,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:36:22,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:36:22,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:36:22,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:36:22,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:36:22,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:36:22,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:36:22,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:36:22,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:36:22,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:36:22,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:36:22,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:36:22,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:36:22,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:36:22,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:36:22,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:36:22,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:36:22,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:36:22,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:36:22,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:36:22,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:36:22,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:36:22,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:36:22,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:36:22,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:36:22,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:36:22,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:36:22,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:36:22,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:36:22,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:36:22,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:36:22,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:36:22,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:36:22,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:36:22,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:36:22,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:36:23,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:36:23,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:36:23,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:36:23,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:36:23,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:36:23,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:36:23,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:36:23,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:36:23,020 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:36:23,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:36:23,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:36:23,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:36:23,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:36:23,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:36:23,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:36:23,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:36:23,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:36:23,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:36:23,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:36:23,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:36:23,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:36:23,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:36:23,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:36:23,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:36:23,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:36:23,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:36:23,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:36:23,024 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:36:23,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:36:23,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:36:23,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:36:23,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 [2021-12-22 14:36:23,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:36:23,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:36:23,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:36:23,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:36:23,260 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:36:23,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-22 14:36:23,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a370033/07338f28a098469dae36d167ab2d1444/FLAG5ef42de75 [2021-12-22 14:36:23,918 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:36:23,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-22 14:36:23,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a370033/07338f28a098469dae36d167ab2d1444/FLAG5ef42de75 [2021-12-22 14:36:24,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a370033/07338f28a098469dae36d167ab2d1444 [2021-12-22 14:36:24,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:36:24,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:36:24,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:36:24,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:36:24,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:36:24,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:36:24" (1/1) ... [2021-12-22 14:36:24,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639d30f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:24, skipping insertion in model container [2021-12-22 14:36:24,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:36:24" (1/1) ... [2021-12-22 14:36:24,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:36:24,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:36:25,139 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-12-22 14:36:25,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:36:25,615 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:36:25,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-12-22 14:36:25,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:36:25,982 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:36:25,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25 WrapperNode [2021-12-22 14:36:25,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:36:25,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:36:25,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:36:25,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:36:25,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,164 INFO L137 Inliner]: procedures = 163, calls = 1186, calls flagged for inlining = 76, calls inlined = 76, statements flattened = 3081 [2021-12-22 14:36:26,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:36:26,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:36:26,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:36:26,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:36:26,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:36:26,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:36:26,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:36:26,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:36:26,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (1/1) ... [2021-12-22 14:36:26,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:36:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:26,372 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 14:36:26,384 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 14:36:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-12-22 14:36:26,416 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-12-22 14:36:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_unregister_dev [2021-12-22 14:36:26,416 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_unregister_dev [2021-12-22 14:36:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2021-12-22 14:36:26,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2021-12-22 14:36:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2021-12-22 14:36:26,417 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2021-12-22 14:36:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:36:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-12-22 14:36:26,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-12-22 14:36:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:36:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:36:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-22 14:36:26,418 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-22 14:36:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:36:26,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:36:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:36:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-22 14:36:26,418 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-22 14:36:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-22 14:36:26,419 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-22 14:36:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-22 14:36:26,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-22 14:36:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:36:26,419 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:36:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_disconnect [2021-12-22 14:36:26,419 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_disconnect [2021-12-22 14:36:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 14:36:26,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 14:36:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:36:26,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:36:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-22 14:36:26,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-22 14:36:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-22 14:36:26,421 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-22 14:36:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_get_priv [2021-12-22 14:36:26,421 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_get_priv [2021-12-22 14:36:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2021-12-22 14:36:26,421 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2021-12-22 14:36:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:36:26,422 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:36:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:36:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:36:26,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:36:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_rx_complete [2021-12-22 14:36:26,423 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_rx_complete [2021-12-22 14:36:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-12-22 14:36:26,423 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-12-22 14:36:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-12-22 14:36:26,423 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-12-22 14:36:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:36:26,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:36:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-22 14:36:26,424 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-22 14:36:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:36:26,425 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:36:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:36:26,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:36:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:36:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-22 14:36:26,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-22 14:36:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-12-22 14:36:26,426 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-12-22 14:36:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:36:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-22 14:36:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-22 14:36:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-22 14:36:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-22 14:36:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:36:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:36:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:36:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:36:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_cmd_event_complete [2021-12-22 14:36:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_cmd_event_complete [2021-12-22 14:36:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2021-12-22 14:36:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2021-12-22 14:36:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:36:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-12-22 14:36:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-12-22 14:36:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-12-22 14:36:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-12-22 14:36:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:36:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:36:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_10 [2021-12-22 14:36:26,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_10 [2021-12-22 14:36:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-22 14:36:26,430 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-22 14:36:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-22 14:36:26,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-22 14:36:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:36:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_resume [2021-12-22 14:36:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_resume [2021-12-22 14:36:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-12-22 14:36:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-12-22 14:36:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-22 14:36:26,433 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-22 14:36:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:36:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-12-22 14:36:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:36:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:36:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:36:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:36:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-12-22 14:36:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-12-22 14:36:27,001 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:36:27,004 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:36:27,275 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:36:27,904 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-22 14:36:31,075 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:36:31,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:36:31,096 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 14:36:31,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:36:31 BoogieIcfgContainer [2021-12-22 14:36:31,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:36:31,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:36:31,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:36:31,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:36:31,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:36:24" (1/3) ... [2021-12-22 14:36:31,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d208f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:36:31, skipping insertion in model container [2021-12-22 14:36:31,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:25" (2/3) ... [2021-12-22 14:36:31,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d208f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:36:31, skipping insertion in model container [2021-12-22 14:36:31,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:36:31" (3/3) ... [2021-12-22 14:36:31,111 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-22 14:36:31,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:36:31,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:36:31,170 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:36:31,184 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 14:36:31,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:36:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 855 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 657 states have internal predecessors, (874), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-22 14:36:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 14:36:31,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:31,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:36:31,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -967497407, now seen corresponding path program 1 times [2021-12-22 14:36:31,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943665171] [2021-12-22 14:36:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:31,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:31,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:31,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:31,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:36:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:36:31,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:31,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943665171] [2021-12-22 14:36:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943665171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:31,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:31,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:36:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631630382] [2021-12-22 14:36:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:31,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:36:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:36:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:36:31,781 INFO L87 Difference]: Start difference. First operand has 855 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 657 states have internal predecessors, (874), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 14:36:34,150 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 14:36:36,173 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 14:36:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:39,889 INFO L93 Difference]: Finished difference Result 2754 states and 4123 transitions. [2021-12-22 14:36:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:36:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-22 14:36:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:39,922 INFO L225 Difference]: With dead ends: 2754 [2021-12-22 14:36:39,922 INFO L226 Difference]: Without dead ends: 1880 [2021-12-22 14:36:39,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:36:39,936 INFO L933 BasicCegarLoop]: 1336 mSDtfsCounter, 1892 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 1010 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 2437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:39,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2043 Valid, 3526 Invalid, 2437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1010 Valid, 1425 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-12-22 14:36:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-12-22 14:36:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1612. [2021-12-22 14:36:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1197 states have (on average 1.3751044277360067) internal successors, (1646), 1229 states have internal predecessors, (1646), 332 states have call successors, (332), 83 states have call predecessors, (332), 82 states have return successors, (327), 311 states have call predecessors, (327), 327 states have call successors, (327) [2021-12-22 14:36:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2305 transitions. [2021-12-22 14:36:40,133 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2305 transitions. Word has length 44 [2021-12-22 14:36:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:40,133 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2305 transitions. [2021-12-22 14:36:40,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 14:36:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2305 transitions. [2021-12-22 14:36:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 14:36:40,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:40,141 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:36:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:36:40,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1415687837, now seen corresponding path program 1 times [2021-12-22 14:36:40,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559456899] [2021-12-22 14:36:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:40,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:36:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:36:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:36:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:40,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:40,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559456899] [2021-12-22 14:36:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559456899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:40,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:40,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:36:40,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201064471] [2021-12-22 14:36:40,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:40,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:36:40,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:36:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:36:40,453 INFO L87 Difference]: Start difference. First operand 1612 states and 2305 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:36:42,654 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 14:36:44,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:36:47,648 WARN L534 Checker$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 14:36:49,671 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 14:36:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:52,524 INFO L93 Difference]: Finished difference Result 5349 states and 7945 transitions. [2021-12-22 14:36:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:36:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2021-12-22 14:36:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:52,548 INFO L225 Difference]: With dead ends: 5349 [2021-12-22 14:36:52,548 INFO L226 Difference]: Without dead ends: 3748 [2021-12-22 14:36:52,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:36:52,556 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 1950 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 1013 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 3599 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1013 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:52,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2078 Valid, 3599 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1013 Valid, 1430 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2021-12-22 14:36:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-12-22 14:36:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3286. [2021-12-22 14:36:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2434 states have (on average 1.3697617091207888) internal successors, (3334), 2504 states have internal predecessors, (3334), 671 states have call successors, (671), 165 states have call predecessors, (671), 180 states have return successors, (762), 642 states have call predecessors, (762), 666 states have call successors, (762) [2021-12-22 14:36:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4767 transitions. [2021-12-22 14:36:52,701 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4767 transitions. Word has length 61 [2021-12-22 14:36:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:52,702 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4767 transitions. [2021-12-22 14:36:52,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:36:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4767 transitions. [2021-12-22 14:36:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 14:36:52,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:52,707 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:36:52,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:36:52,711 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash -937016713, now seen corresponding path program 1 times [2021-12-22 14:36:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296844036] [2021-12-22 14:36:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:52,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:52,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:53,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:53,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:36:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:53,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:36:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:36:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:53,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296844036] [2021-12-22 14:36:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296844036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:53,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:53,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:36:53,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512170182] [2021-12-22 14:36:53,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:53,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:36:53,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:36:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:36:53,057 INFO L87 Difference]: Start difference. First operand 3286 states and 4767 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:36:55,267 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 14:36:57,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:37:00,950 WARN L534 Checker$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 14:37:02,974 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 14:37:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:04,780 INFO L93 Difference]: Finished difference Result 10731 states and 16197 transitions. [2021-12-22 14:37:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:37:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2021-12-22 14:37:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:04,833 INFO L225 Difference]: With dead ends: 10731 [2021-12-22 14:37:04,833 INFO L226 Difference]: Without dead ends: 7456 [2021-12-22 14:37:04,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:37:04,853 INFO L933 BasicCegarLoop]: 1301 mSDtfsCounter, 2006 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 1034 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 3445 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:04,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2147 Valid, 3445 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 1398 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2021-12-22 14:37:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-12-22 14:37:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6627. [2021-12-22 14:37:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 4901 states have (on average 1.3650275453988983) internal successors, (6690), 5047 states have internal predecessors, (6690), 1349 states have call successors, (1349), 329 states have call predecessors, (1349), 376 states have return successors, (1702), 1304 states have call predecessors, (1702), 1344 states have call successors, (1702) [2021-12-22 14:37:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 9741 transitions. [2021-12-22 14:37:05,182 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 9741 transitions. Word has length 62 [2021-12-22 14:37:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:05,183 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 9741 transitions. [2021-12-22 14:37:05,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:37:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 9741 transitions. [2021-12-22 14:37:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 14:37:05,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:05,186 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:05,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:37:05,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1016891110, now seen corresponding path program 1 times [2021-12-22 14:37:05,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:05,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84744988] [2021-12-22 14:37:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:05,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:37:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:37:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:37:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:37:05,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:05,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84744988] [2021-12-22 14:37:05,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84744988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:05,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:37:05,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:37:05,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689555073] [2021-12-22 14:37:05,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:05,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:37:05,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:37:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:37:05,512 INFO L87 Difference]: Start difference. First operand 6627 states and 9741 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:37:07,699 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 14:37:09,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:37:13,337 WARN L534 Checker$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 14:37:15,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:37:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:16,960 INFO L93 Difference]: Finished difference Result 7454 states and 11168 transitions. [2021-12-22 14:37:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:37:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2021-12-22 14:37:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:17,001 INFO L225 Difference]: With dead ends: 7454 [2021-12-22 14:37:17,001 INFO L226 Difference]: Without dead ends: 7451 [2021-12-22 14:37:17,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:37:17,007 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 2003 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 1027 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 3450 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:17,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2142 Valid, 3450 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 1387 Invalid, 4 Unknown, 0 Unchecked, 11.2s Time] [2021-12-22 14:37:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-12-22 14:37:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 6628. [2021-12-22 14:37:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6628 states, 4902 states have (on average 1.364953080375357) internal successors, (6691), 5048 states have internal predecessors, (6691), 1349 states have call successors, (1349), 329 states have call predecessors, (1349), 376 states have return successors, (1702), 1304 states have call predecessors, (1702), 1344 states have call successors, (1702) [2021-12-22 14:37:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6628 states to 6628 states and 9742 transitions. [2021-12-22 14:37:17,300 INFO L78 Accepts]: Start accepts. Automaton has 6628 states and 9742 transitions. Word has length 63 [2021-12-22 14:37:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 6628 states and 9742 transitions. [2021-12-22 14:37:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:37:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6628 states and 9742 transitions. [2021-12-22 14:37:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 14:37:17,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:17,306 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:17,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:37:17,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1458496346, now seen corresponding path program 1 times [2021-12-22 14:37:17,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:17,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072529489] [2021-12-22 14:37:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:17,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:37:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:37:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:37:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:37:17,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072529489] [2021-12-22 14:37:17,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072529489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:17,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:37:17,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:37:17,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813901503] [2021-12-22 14:37:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:17,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:37:17,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:37:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:37:17,556 INFO L87 Difference]: Start difference. First operand 6628 states and 9742 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:37:19,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:37:21,733 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 14:37:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:23,675 INFO L93 Difference]: Finished difference Result 7450 states and 11164 transitions. [2021-12-22 14:37:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:37:23,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2021-12-22 14:37:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:23,723 INFO L225 Difference]: With dead ends: 7450 [2021-12-22 14:37:23,723 INFO L226 Difference]: Without dead ends: 7447 [2021-12-22 14:37:23,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:37:23,731 INFO L933 BasicCegarLoop]: 1125 mSDtfsCounter, 1541 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 574 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:23,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 2213 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 789 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-12-22 14:37:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2021-12-22 14:37:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 6627. [2021-12-22 14:37:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 4902 states have (on average 1.364749082007344) internal successors, (6690), 5047 states have internal predecessors, (6690), 1348 states have call successors, (1348), 329 states have call predecessors, (1348), 376 states have return successors, (1702), 1304 states have call predecessors, (1702), 1344 states have call successors, (1702) [2021-12-22 14:37:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 9740 transitions. [2021-12-22 14:37:24,031 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 9740 transitions. Word has length 64 [2021-12-22 14:37:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:24,032 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 9740 transitions. [2021-12-22 14:37:24,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:37:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 9740 transitions. [2021-12-22 14:37:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 14:37:24,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:24,035 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:24,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:37:24,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:24,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2031605655, now seen corresponding path program 1 times [2021-12-22 14:37:24,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:24,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350785166] [2021-12-22 14:37:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:24,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:37:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:37:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:37:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:37:24,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350785166] [2021-12-22 14:37:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350785166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:24,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:37:24,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:37:24,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363597928] [2021-12-22 14:37:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:37:24,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:37:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:37:24,263 INFO L87 Difference]: Start difference. First operand 6627 states and 9740 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 14:37:26,430 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 []