./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-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 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:13:52,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:13:52,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:13:52,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:13:52,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:13:52,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:13:52,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:13:52,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:13:52,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:13:52,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:13:52,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:13:52,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:13:52,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:13:52,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:13:52,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:13:52,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:13:52,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:13:52,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:13:52,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:13:52,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:13:52,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:13:52,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:13:52,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:13:52,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:13:52,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:13:52,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:13:52,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:13:52,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:13:52,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:13:52,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:13:52,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:13:52,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:13:52,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:13:52,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:13:52,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:13:52,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:13:52,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:13:52,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:13:52,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:13:52,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:13:52,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:13:52,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:13:52,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:13:52,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:13:52,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:13:52,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:13:52,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:13:52,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:13:52,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:13:52,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:13:52,724 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:13:52,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:13:52,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:13:52,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:13:52,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:13:52,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:13:52,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:13:52,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:13:52,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:13:52,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:13:52,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:13:52,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:13:52,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:13:52,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:13:52,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:13:52,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:13:52,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:13:52,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:13:52,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:13:52,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:13:52,730 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:13:52,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:13:52,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:13:52,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 [2021-12-21 16:13:52,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:13:52,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:13:52,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:13:52,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:13:52,961 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:13:52,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-21 16:13:53,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/895e66130/b916010410c1456c9abc3bb479cf252a/FLAGe5153e9f0 [2021-12-21 16:13:53,693 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:13:53,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-21 16:13:53,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/895e66130/b916010410c1456c9abc3bb479cf252a/FLAGe5153e9f0 [2021-12-21 16:13:54,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/895e66130/b916010410c1456c9abc3bb479cf252a [2021-12-21 16:13:54,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:13:54,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:13:54,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:13:54,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:13:54,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:13:54,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:13:54" (1/1) ... [2021-12-21 16:13:54,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90bc27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:54, skipping insertion in model container [2021-12-21 16:13:54,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:13:54" (1/1) ... [2021-12-21 16:13:54,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:13:54,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:13:54,900 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-12-21 16:13:55,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:13:55,422 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:13:55,564 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-12-21 16:13:55,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:13:55,788 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:13:55,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55 WrapperNode [2021-12-21 16:13:55,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:13:55,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:13:55,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:13:55,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:13:55,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:55,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:55,965 INFO L137 Inliner]: procedures = 157, calls = 1181, calls flagged for inlining = 63, calls inlined = 51, statements flattened = 2337 [2021-12-21 16:13:55,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:13:55,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:13:55,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:13:55,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:13:55,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:55,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:13:56,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:13:56,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:13:56,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:13:56,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (1/1) ... [2021-12-21 16:13:56,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:13:56,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:13:56,197 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) [2021-12-21 16:13:56,217 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 [2021-12-21 16:13:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-12-21 16:13:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-12-21 16:13:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2021-12-21 16:13:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2021-12-21 16:13:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:13:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-12-21 16:13:56,239 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-12-21 16:13:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-21 16:13:56,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-21 16:13:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-21 16:13:56,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-21 16:13:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:13:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:13:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-21 16:13:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-21 16:13:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:13:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:13:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:13:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-21 16:13:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-21 16:13:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-21 16:13:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-21 16:13:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_disconnect [2021-12-21 16:13:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_disconnect [2021-12-21 16:13:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:13:56,242 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:13:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-21 16:13:56,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-21 16:13:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:13:56,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:13:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-21 16:13:56,242 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-21 16:13:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_get_priv [2021-12-21 16:13:56,243 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_get_priv [2021-12-21 16:13:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2021-12-21 16:13:56,243 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2021-12-21 16:13:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-21 16:13:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-21 16:13:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:13:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:13:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:13:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-21 16:13:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-21 16:13:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:13:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:13:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-12-21 16:13:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-12-21 16:13:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:13:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:13:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-21 16:13:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-21 16:13:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 16:13:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 16:13:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:13:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:13:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:13:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-12-21 16:13:56,248 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-12-21 16:13:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:13:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-21 16:13:56,249 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-21 16:13:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:13:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:13:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_cmd_event_complete [2021-12-21 16:13:56,249 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_cmd_event_complete [2021-12-21 16:13:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:13:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-12-21 16:13:56,250 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-12-21 16:13:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-12-21 16:13:56,250 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-12-21 16:13:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-21 16:13:56,251 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-21 16:13:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:13:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:13:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-21 16:13:56,251 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-21 16:13:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-21 16:13:56,252 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-21 16:13:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:13:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_resume [2021-12-21 16:13:56,252 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_resume [2021-12-21 16:13:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-21 16:13:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-21 16:13:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-21 16:13:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-21 16:13:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:13:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-12-21 16:13:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:13:56,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:13:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:13:56,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:13:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-12-21 16:13:56,255 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-12-21 16:13:56,684 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:13:56,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:13:56,784 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:14:00,513 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:14:00,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:14:00,523 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 16:14:00,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:14:00 BoogieIcfgContainer [2021-12-21 16:14:00,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:14:00,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:14:00,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:14:00,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:14:00,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:13:54" (1/3) ... [2021-12-21 16:14:00,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:14:00, skipping insertion in model container [2021-12-21 16:14:00,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:13:55" (2/3) ... [2021-12-21 16:14:00,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:14:00, skipping insertion in model container [2021-12-21 16:14:00,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:14:00" (3/3) ... [2021-12-21 16:14:00,534 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-21 16:14:00,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:14:00,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:14:00,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:14:00,596 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 [2021-12-21 16:14:00,596 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:14:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 678 states, 502 states have (on average 1.3764940239043826) internal successors, (691), 515 states have internal predecessors, (691), 137 states have call successors, (137), 38 states have call predecessors, (137), 37 states have return successors, (133), 130 states have call predecessors, (133), 133 states have call successors, (133) [2021-12-21 16:14:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 16:14:00,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:14:00,633 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, 1] [2021-12-21 16:14:00,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:14:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:14:00,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1998328016, now seen corresponding path program 1 times [2021-12-21 16:14:00,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:14:00,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072967710] [2021-12-21 16:14:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:14:00,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:14:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:01,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:14:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:01,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:14:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:01,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:14:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:01,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:14:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 16:14:01,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:14:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072967710] [2021-12-21 16:14:01,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072967710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:14:01,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:14:01,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:14:01,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364813419] [2021-12-21 16:14:01,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:14:01,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:14:01,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:14:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:14:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:14:01,289 INFO L87 Difference]: Start difference. First operand has 678 states, 502 states have (on average 1.3764940239043826) internal successors, (691), 515 states have internal predecessors, (691), 137 states have call successors, (137), 38 states have call predecessors, (137), 37 states have return successors, (133), 130 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-12-21 16:14:03,673 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 [] [2021-12-21 16:14:05,692 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 [] [2021-12-21 16:14:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:14:08,316 INFO L93 Difference]: Finished difference Result 2121 states and 3115 transitions. [2021-12-21 16:14:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:14:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 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 45 [2021-12-21 16:14:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:14:08,355 INFO L225 Difference]: With dead ends: 2121 [2021-12-21 16:14:08,355 INFO L226 Difference]: Without dead ends: 1432 [2021-12-21 16:14:08,362 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 [2021-12-21 16:14:08,365 INFO L933 BasicCegarLoop]: 1045 mSDtfsCounter, 1384 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 687 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:14:08,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 2825 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 961 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-12-21 16:14:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-12-21 16:14:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1286. [2021-12-21 16:14:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 957 states have (on average 1.3657262277951934) internal successors, (1307), 971 states have internal predecessors, (1307), 256 states have call successors, (256), 73 states have call predecessors, (256), 72 states have return successors, (255), 249 states have call predecessors, (255), 255 states have call successors, (255) [2021-12-21 16:14:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1818 transitions. [2021-12-21 16:14:08,518 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1818 transitions. Word has length 45 [2021-12-21 16:14:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:14:08,519 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 1818 transitions. [2021-12-21 16:14:08,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-12-21 16:14:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1818 transitions. [2021-12-21 16:14:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 16:14:08,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:14:08,526 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] [2021-12-21 16:14:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:14:08,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:14:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:14:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1828543170, now seen corresponding path program 1 times [2021-12-21 16:14:08,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:14:08,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660841801] [2021-12-21 16:14:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:14:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:14:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:14:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:14:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:14:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:14:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:14:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:14:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:14:08,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:14:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660841801] [2021-12-21 16:14:08,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660841801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:14:08,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:14:08,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:14:08,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540460307] [2021-12-21 16:14:08,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:14:08,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:14:08,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:14:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:14:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:14:08,925 INFO L87 Difference]: Start difference. First operand 1286 states and 1818 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:14:11,154 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 [] [2021-12-21 16:14:13,172 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 [] [2021-12-21 16:14:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:14:15,763 INFO L93 Difference]: Finished difference Result 4123 states and 5934 transitions. [2021-12-21 16:14:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:14:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-12-21 16:14:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:14:15,784 INFO L225 Difference]: With dead ends: 4123 [2021-12-21 16:14:15,785 INFO L226 Difference]: Without dead ends: 2839 [2021-12-21 16:14:15,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:14:15,792 INFO L933 BasicCegarLoop]: 1089 mSDtfsCounter, 1367 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 662 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4958 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:14:15,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 4958 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 1324 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-12-21 16:14:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2021-12-21 16:14:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2591. [2021-12-21 16:14:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 1927 states have (on average 1.3642968344577062) internal successors, (2629), 1963 states have internal predecessors, (2629), 507 states have call successors, (507), 145 states have call predecessors, (507), 156 states have return successors, (561), 498 states have call predecessors, (561), 506 states have call successors, (561) [2021-12-21 16:14:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3697 transitions. [2021-12-21 16:14:15,935 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3697 transitions. Word has length 63 [2021-12-21 16:14:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:14:15,936 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3697 transitions. [2021-12-21 16:14:15,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:14:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3697 transitions. [2021-12-21 16:14:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 16:14:15,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:14:15,951 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:14:15,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:14:15,952 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:14:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:14:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1080085425, now seen corresponding path program 1 times [2021-12-21 16:14:15,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:14:15,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385353197] [2021-12-21 16:14:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:14:15,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:14:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:14:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:14:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:14:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:14:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:14:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 16:14:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:14:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 16:14:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:14:16,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:14:16,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385353197] [2021-12-21 16:14:16,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385353197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:14:16,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:14:16,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:14:16,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824831615] [2021-12-21 16:14:16,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:14:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:14:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:14:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:14:16,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:14:16,321 INFO L87 Difference]: Start difference. First operand 2591 states and 3697 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:14:18,483 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 [] [2021-12-21 16:14:20,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:22,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:25,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:27,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:29,129 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 [] [2021-12-21 16:14:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:14:31,810 INFO L93 Difference]: Finished difference Result 7632 states and 10965 transitions. [2021-12-21 16:14:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:14:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-12-21 16:14:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:14:31,840 INFO L225 Difference]: With dead ends: 7632 [2021-12-21 16:14:31,841 INFO L226 Difference]: Without dead ends: 5053 [2021-12-21 16:14:31,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:14:31,850 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 1308 mSDsluCounter, 2349 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 882 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 882 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:14:31,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 3382 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [882 Valid, 1328 Invalid, 6 Unknown, 0 Unchecked, 15.2s Time] [2021-12-21 16:14:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-12-21 16:14:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 4275. [2021-12-21 16:14:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 3162 states have (on average 1.3488298545224542) internal successors, (4265), 3224 states have internal predecessors, (4265), 829 states have call successors, (829), 262 states have call predecessors, (829), 283 states have return successors, (918), 816 states have call predecessors, (918), 828 states have call successors, (918) [2021-12-21 16:14:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 6012 transitions. [2021-12-21 16:14:32,029 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 6012 transitions. Word has length 113 [2021-12-21 16:14:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:14:32,031 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 6012 transitions. [2021-12-21 16:14:32,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:14:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 6012 transitions. [2021-12-21 16:14:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 16:14:32,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:14:32,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:14:32,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:14:32,044 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:14:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:14:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash 265725666, now seen corresponding path program 1 times [2021-12-21 16:14:32,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:14:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032023153] [2021-12-21 16:14:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:14:32,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:14:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:14:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:14:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:14:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:14:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:14:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:14:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 16:14:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 16:14:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 16:14:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 16:14:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-21 16:14:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-21 16:14:32,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:14:32,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032023153] [2021-12-21 16:14:32,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032023153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:14:32,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:14:32,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:14:32,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439424212] [2021-12-21 16:14:32,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:14:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:14:32,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:14:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:14:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:14:32,386 INFO L87 Difference]: Start difference. First operand 4275 states and 6012 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:14:34,507 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 [] [2021-12-21 16:14:36,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:38,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:40,885 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 [] [2021-12-21 16:14:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:14:43,366 INFO L93 Difference]: Finished difference Result 10577 states and 14962 transitions. [2021-12-21 16:14:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:14:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-12-21 16:14:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:14:43,400 INFO L225 Difference]: With dead ends: 10577 [2021-12-21 16:14:43,400 INFO L226 Difference]: Without dead ends: 6318 [2021-12-21 16:14:43,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:14:43,417 INFO L933 BasicCegarLoop]: 1215 mSDtfsCounter, 826 mSDsluCounter, 3157 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 417 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 4372 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:14:43,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 4372 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 1208 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2021-12-21 16:14:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2021-12-21 16:14:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5704. [2021-12-21 16:14:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 4250 states have (on average 1.3538823529411765) internal successors, (5754), 4336 states have internal predecessors, (5754), 1066 states have call successors, (1066), 358 states have call predecessors, (1066), 387 states have return successors, (1183), 1041 states have call predecessors, (1183), 1065 states have call successors, (1183) [2021-12-21 16:14:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 8003 transitions. [2021-12-21 16:14:43,664 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 8003 transitions. Word has length 130 [2021-12-21 16:14:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:14:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 8003 transitions. [2021-12-21 16:14:43,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:14:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 8003 transitions. [2021-12-21 16:14:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-21 16:14:43,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:14:43,678 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:14:43,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:14:43,678 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:14:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:14:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1355234686, now seen corresponding path program 1 times [2021-12-21 16:14:43,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:14:43,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116097886] [2021-12-21 16:14:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:14:43,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:14:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:43,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:14:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:43,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:14:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:43,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:14:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:14:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:43,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:14:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:14:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 16:14:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:14:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:14:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 16:14:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 16:14:44,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:14:44,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116097886] [2021-12-21 16:14:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116097886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:14:44,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:14:44,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 16:14:44,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627326456] [2021-12-21 16:14:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:14:44,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:14:44,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:14:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:14:44,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:14:44,099 INFO L87 Difference]: Start difference. First operand 5704 states and 8003 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:14:46,249 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 [] [2021-12-21 16:14:48,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:50,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:14:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:14:52,750 INFO L93 Difference]: Finished difference Result 9240 states and 13053 transitions. [2021-12-21 16:14:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 16:14:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-12-21 16:14:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:14:52,772 INFO L225 Difference]: With dead ends: 9240 [2021-12-21 16:14:52,772 INFO L226 Difference]: Without dead ends: 3553 [2021-12-21 16:14:52,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:14:52,791 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 488 mSDsluCounter, 3879 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 519 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4774 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:14:52,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 4774 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 1310 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2021-12-21 16:14:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-12-21 16:14:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2926. [2021-12-21 16:14:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2183 states have (on average 1.3518094365551994) internal successors, (2951), 2226 states have internal predecessors, (2951), 540 states have call successors, (540), 188 states have call predecessors, (540), 202 states have return successors, (598), 527 states have call predecessors, (598), 539 states have call successors, (598) [2021-12-21 16:14:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 4089 transitions. [2021-12-21 16:14:52,924 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 4089 transitions. Word has length 138 [2021-12-21 16:14:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:14:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 4089 transitions. [2021-12-21 16:14:52,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:14:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 4089 transitions. [2021-12-21 16:14:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-21 16:14:52,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:14:52,935 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:14:52,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:14:52,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:14:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:14:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash 874391015, now seen corresponding path program 1 times [2021-12-21 16:14:52,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:14:52,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535786584] [2021-12-21 16:14:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:14:52,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:14:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:14:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:14:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:14:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:14:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:14:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:14:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 16:14:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:14:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 16:14:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 16:14:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:14:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:14:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:14:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-21 16:14:53,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:14:53,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535786584] [2021-12-21 16:14:53,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535786584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:14:53,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:14:53,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 16:14:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248993017] [2021-12-21 16:14:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:14:53,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:14:53,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:14:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:14:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:14:53,435 INFO L87 Difference]: Start difference. First operand 2926 states and 4089 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-21 16:14:55,583 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 []