./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 ae007674 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-ae00767 [2021-12-28 04:22:01,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 04:22:01,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 04:22:01,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 04:22:01,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 04:22:01,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 04:22:01,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 04:22:01,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 04:22:01,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 04:22:01,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 04:22:01,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 04:22:01,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 04:22:01,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 04:22:01,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 04:22:01,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 04:22:01,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 04:22:01,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 04:22:01,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 04:22:01,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 04:22:01,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 04:22:01,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 04:22:01,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 04:22:01,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 04:22:01,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 04:22:01,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 04:22:01,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 04:22:01,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 04:22:01,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 04:22:01,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 04:22:01,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 04:22:01,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 04:22:01,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 04:22:01,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 04:22:01,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 04:22:01,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 04:22:01,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 04:22:01,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 04:22:01,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 04:22:01,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 04:22:01,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 04:22:01,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 04:22:01,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 04:22:02,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 04:22:02,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 04:22:02,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 04:22:02,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 04:22:02,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 04:22:02,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 04:22:02,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 04:22:02,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 04:22:02,011 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 04:22:02,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 04:22:02,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 04:22:02,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 04:22:02,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 04:22:02,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 04:22:02,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 04:22:02,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 04:22:02,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 04:22:02,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 04:22:02,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 04:22:02,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 04:22:02,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 04:22:02,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:22:02,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 04:22:02,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 04:22:02,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 04:22:02,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 04:22:02,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 04:22:02,016 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 04:22:02,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 04:22:02,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 04:22:02,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2021-12-28 04:22:02,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 04:22:02,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 04:22:02,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 04:22:02,416 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 04:22:02,416 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 04:22:02,418 INFO L432 ainManager$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 [2021-12-28 04:22:02,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0261176f8/6ec120bf90bf4c2cbf39ec246c439c9a/FLAGbc25a943f [2021-12-28 04:22:03,260 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 04:22:03,261 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 [2021-12-28 04:22:03,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0261176f8/6ec120bf90bf4c2cbf39ec246c439c9a/FLAGbc25a943f [2021-12-28 04:22:03,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0261176f8/6ec120bf90bf4c2cbf39ec246c439c9a [2021-12-28 04:22:03,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 04:22:03,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 04:22:03,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 04:22:03,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 04:22:03,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 04:22:03,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:22:03" (1/1) ... [2021-12-28 04:22:03,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19818e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:03, skipping insertion in model container [2021-12-28 04:22:03,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:22:03" (1/1) ... [2021-12-28 04:22:03,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 04:22:03,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 04:22:05,163 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] [2021-12-28 04:22:05,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:22:05,436 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 04:22:05,770 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] [2021-12-28 04:22:05,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:22:05,930 INFO L208 MainTranslator]: Completed translation [2021-12-28 04:22:05,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05 WrapperNode [2021-12-28 04:22:05,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 04:22:05,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 04:22:05,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 04:22:05,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 04:22:05,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,281 INFO L137 Inliner]: procedures = 217, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3526 [2021-12-28 04:22:06,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 04:22:06,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 04:22:06,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 04:22:06,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 04:22:06,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 04:22:06,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 04:22:06,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 04:22:06,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 04:22:06,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (1/1) ... [2021-12-28 04:22:06,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:22:06,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 04:22:06,673 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) [2021-12-28 04:22:06,676 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 [2021-12-28 04:22:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-28 04:22:06,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-28 04:22:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-28 04:22:06,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-28 04:22:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 04:22:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 04:22:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 04:22:06,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 04:22:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-28 04:22:06,717 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-28 04:22:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-12-28 04:22:06,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-12-28 04:22:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-12-28 04:22:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-12-28 04:22:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2021-12-28 04:22:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2021-12-28 04:22:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-12-28 04:22:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-12-28 04:22:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 04:22:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 04:22:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-28 04:22:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-28 04:22:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 04:22:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 04:22:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 04:22:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 04:22:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 04:22:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 04:22:06,720 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-12-28 04:22:06,721 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-12-28 04:22:06,721 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-28 04:22:06,721 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-28 04:22:06,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 04:22:06,721 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-28 04:22:06,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 04:22:06,721 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-12-28 04:22:06,722 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-12-28 04:22:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-28 04:22:06,722 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-28 04:22:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 04:22:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 04:22:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-12-28 04:22:06,723 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-12-28 04:22:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-28 04:22:06,723 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-28 04:22:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-28 04:22:06,724 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-28 04:22:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-12-28 04:22:06,724 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-12-28 04:22:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-28 04:22:06,724 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-28 04:22:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 04:22:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-28 04:22:06,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-28 04:22:06,725 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-12-28 04:22:06,725 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-12-28 04:22:06,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 04:22:06,726 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-28 04:22:06,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-28 04:22:06,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 04:22:06,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-12-28 04:22:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-12-28 04:22:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 04:22:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 04:22:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-28 04:22:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-28 04:22:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 04:22:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 04:22:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-12-28 04:22:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-12-28 04:22:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 04:22:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-12-28 04:22:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-12-28 04:22:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 04:22:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 04:22:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-28 04:22:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-28 04:22:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 04:22:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 04:22:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-12-28 04:22:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-12-28 04:22:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-12-28 04:22:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-12-28 04:22:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-28 04:22:06,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-28 04:22:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-28 04:22:06,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-28 04:22:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 04:22:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-28 04:22:06,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-28 04:22:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-12-28 04:22:06,732 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-12-28 04:22:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-28 04:22:06,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-28 04:22:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-28 04:22:06,733 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-28 04:22:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-28 04:22:06,734 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-28 04:22:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-12-28 04:22:06,734 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-12-28 04:22:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-12-28 04:22:06,735 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-12-28 04:22:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-12-28 04:22:06,735 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-12-28 04:22:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-12-28 04:22:06,735 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-12-28 04:22:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-28 04:22:06,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-28 04:22:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 04:22:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-28 04:22:06,736 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-28 04:22:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-12-28 04:22:06,737 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-12-28 04:22:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 04:22:06,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 04:22:07,259 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 04:22:07,263 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 04:22:07,446 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 04:22:40,567 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 04:22:40,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 04:22:40,587 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 04:22:40,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:22:40 BoogieIcfgContainer [2021-12-28 04:22:40,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 04:22:40,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 04:22:40,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 04:22:40,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 04:22:40,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 04:22:03" (1/3) ... [2021-12-28 04:22:40,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15666fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:22:40, skipping insertion in model container [2021-12-28 04:22:40,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:22:05" (2/3) ... [2021-12-28 04:22:40,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15666fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:22:40, skipping insertion in model container [2021-12-28 04:22:40,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:22:40" (3/3) ... [2021-12-28 04:22:40,606 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-28 04:22:40,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 04:22:40,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 04:22:40,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 04:22:40,670 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 [2021-12-28 04:22:40,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 04:22:40,697 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) [2021-12-28 04:22:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 04:22:40,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:22:40,704 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] [2021-12-28 04:22:40,705 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:22:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:22:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2021-12-28 04:22:40,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:22:40,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472402331] [2021-12-28 04:22:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:22:40,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:22:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:22:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:41,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:22:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 04:22:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:41,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 04:22:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 04:22:41,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:22:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472402331] [2021-12-28 04:22:41,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472402331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:22:41,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:22:41,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:22:41,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330554429] [2021-12-28 04:22:41,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:22:41,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:22:41,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:22:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:22:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:22:41,634 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) [2021-12-28 04:22:43,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:22:45,727 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 [] [2021-12-28 04:22:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:22:47,536 INFO L93 Difference]: Finished difference Result 1558 states and 2209 transitions. [2021-12-28 04:22:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 04:22:47,539 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 [2021-12-28 04:22:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:22:47,558 INFO L225 Difference]: With dead ends: 1558 [2021-12-28 04:22:47,559 INFO L226 Difference]: Without dead ends: 823 [2021-12-28 04:22:47,566 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 [2021-12-28 04:22:47,569 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 471 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 446 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-28 04:22:47,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1997 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-12-28 04:22:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-28 04:22:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2021-12-28 04:22:47,669 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) [2021-12-28 04:22:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2021-12-28 04:22:47,677 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2021-12-28 04:22:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:22:47,677 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2021-12-28 04:22:47,678 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) [2021-12-28 04:22:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2021-12-28 04:22:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 04:22:47,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:22:47,680 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] [2021-12-28 04:22:47,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 04:22:47,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:22:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:22:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2021-12-28 04:22:47,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:22:47,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232051789] [2021-12-28 04:22:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:22:47,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:22:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:22:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:48,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:22:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 04:22:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:48,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 04:22:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 04:22:48,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:22:48,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232051789] [2021-12-28 04:22:48,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232051789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:22:48,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:22:48,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 04:22:48,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889047709] [2021-12-28 04:22:48,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:22:48,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 04:22:48,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:22:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 04:22:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:22:48,219 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) [2021-12-28 04:22:50,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:22:52,298 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 [] [2021-12-28 04:22:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:22:55,354 INFO L93 Difference]: Finished difference Result 2329 states and 3239 transitions. [2021-12-28 04:22:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 04:22:55,354 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 [2021-12-28 04:22:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:22:55,367 INFO L225 Difference]: With dead ends: 2329 [2021-12-28 04:22:55,368 INFO L226 Difference]: Without dead ends: 1619 [2021-12-28 04:22:55,372 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 [2021-12-28 04:22:55,374 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 1820 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 1002 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-28 04:22:55,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1911 Valid, 2933 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1002 Valid, 986 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-12-28 04:22:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-12-28 04:22:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1405. [2021-12-28 04:22:55,491 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) [2021-12-28 04:22:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1948 transitions. [2021-12-28 04:22:55,504 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1948 transitions. Word has length 39 [2021-12-28 04:22:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:22:55,505 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1948 transitions. [2021-12-28 04:22:55,505 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) [2021-12-28 04:22:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1948 transitions. [2021-12-28 04:22:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 04:22:55,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:22:55,520 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] [2021-12-28 04:22:55,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 04:22:55,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:22:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:22:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash 950658258, now seen corresponding path program 1 times [2021-12-28 04:22:55,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:22:55,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462974349] [2021-12-28 04:22:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:22:55,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:22:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:22:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:22:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 04:22:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 04:22:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 04:22:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:22:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 04:22:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:22:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 04:22:56,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:22:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462974349] [2021-12-28 04:22:56,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462974349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:22:56,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:22:56,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 04:22:56,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184057089] [2021-12-28 04:22:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:22:56,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 04:22:56,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:22:56,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 04:22:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:22:56,131 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) [2021-12-28 04:22:58,190 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 [] [2021-12-28 04:23:00,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:23:02,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:23:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:23:03,897 INFO L93 Difference]: Finished difference Result 1637 states and 2275 transitions. [2021-12-28 04:23:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 04:23:03,898 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 [2021-12-28 04:23:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:23:03,908 INFO L225 Difference]: With dead ends: 1637 [2021-12-28 04:23:03,909 INFO L226 Difference]: Without dead ends: 1626 [2021-12-28 04:23:03,911 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 [2021-12-28 04:23:03,912 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 1335 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 547 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s 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, 7.6s IncrementalHoareTripleChecker+Time [2021-12-28 04:23:03,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 2478 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 606 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2021-12-28 04:23:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-28 04:23:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1405. [2021-12-28 04:23:03,963 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) [2021-12-28 04:23:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1947 transitions. [2021-12-28 04:23:03,971 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1947 transitions. Word has length 59 [2021-12-28 04:23:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:23:03,971 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1947 transitions. [2021-12-28 04:23:03,972 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) [2021-12-28 04:23:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1947 transitions. [2021-12-28 04:23:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 04:23:03,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:23:03,973 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] [2021-12-28 04:23:03,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 04:23:03,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:23:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:23:03,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916560, now seen corresponding path program 1 times [2021-12-28 04:23:03,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:23:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537654146] [2021-12-28 04:23:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:23:03,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:23:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:23:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:23:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 04:23:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 04:23:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 04:23:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:23:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 04:23:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:23:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 04:23:04,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:23:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537654146] [2021-12-28 04:23:04,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537654146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:23:04,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:23:04,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 04:23:04,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400392437] [2021-12-28 04:23:04,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:23:04,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 04:23:04,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:23:04,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 04:23:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:23:04,555 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) [2021-12-28 04:23:06,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:23:08,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []