./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a78ad5bb06da9a7367e7c9e45cee20fe00113336b7bc544675fdd46fc445ae5c --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:42:12,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:42:12,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:42:12,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:42:12,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:42:12,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:42:12,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:42:12,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:42:12,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:42:12,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:42:12,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:42:12,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:42:12,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:42:12,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:42:12,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:42:12,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:42:12,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:42:12,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:42:12,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:42:12,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:42:12,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:42:12,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:42:12,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:42:12,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:42:12,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:42:12,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:42:12,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:42:12,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:42:12,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:42:12,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:42:12,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:42:12,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:42:12,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:42:12,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:42:12,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:42:12,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:42:12,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:42:12,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:42:12,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:42:12,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:42:12,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:42:12,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:42:12,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:42:12,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:42:12,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:42:12,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:42:12,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:42:12,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:42:12,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:42:12,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:42:12,329 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:42:12,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:42:12,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:42:12,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:42:12,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:42:12,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:42:12,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:42:12,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:42:12,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:42:12,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:42:12,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:42:12,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:42:12,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:42:12,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:42:12,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:42:12,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:42:12,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:42:12,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:42:12,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:42:12,333 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:42:12,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:42:12,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:42:12,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:42:12,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a78ad5bb06da9a7367e7c9e45cee20fe00113336b7bc544675fdd46fc445ae5c [2021-12-14 17:42:12,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:42:12,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:42:12,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:42:12,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:42:12,548 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:42:12,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-14 17:42:12,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1704f414/c2ef8b01778b4318b9a9e665bfb59feb/FLAGdf44dc5e7 [2021-12-14 17:42:13,261 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:42:13,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-14 17:42:13,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1704f414/c2ef8b01778b4318b9a9e665bfb59feb/FLAGdf44dc5e7 [2021-12-14 17:42:13,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1704f414/c2ef8b01778b4318b9a9e665bfb59feb [2021-12-14 17:42:13,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:42:13,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:42:13,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:42:13,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:42:13,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:42:13,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:42:13" (1/1) ... [2021-12-14 17:42:13,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f041bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:13, skipping insertion in model container [2021-12-14 17:42:13,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:42:13" (1/1) ... [2021-12-14 17:42:13,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:42:13,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:42:14,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[181063,181076] [2021-12-14 17:42:14,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:42:14,713 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:42:14,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[181063,181076] [2021-12-14 17:42:14,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:42:15,064 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:42:15,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15 WrapperNode [2021-12-14 17:42:15,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:42:15,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:42:15,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:42:15,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:42:15,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,257 INFO L137 Inliner]: procedures = 183, calls = 1615, calls flagged for inlining = 84, calls inlined = 65, statements flattened = 2934 [2021-12-14 17:42:15,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:42:15,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:42:15,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:42:15,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:42:15,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:42:15,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:42:15,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:42:15,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:42:15,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (1/1) ... [2021-12-14 17:42:15,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:42:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:15,528 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) [2021-12-14 17:42:15,529 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 [2021-12-14 17:42:15,552 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-14 17:42:15,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-14 17:42:15,552 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-12-14 17:42:15,552 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-12-14 17:42:15,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:42:15,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_5 [2021-12-14 17:42:15,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_5 [2021-12-14 17:42:15,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-12-14 17:42:15,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-12-14 17:42:15,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:42:15,553 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-14 17:42:15,553 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-14 17:42:15,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:42:15,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:42:15,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:42:15,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:42:15,554 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-14 17:42:15,554 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-14 17:42:15,555 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-14 17:42:15,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-14 17:42:15,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:42:15,555 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:42:15,555 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-14 17:42:15,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-14 17:42:15,556 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-12-14 17:42:15,556 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-12-14 17:42:15,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:42:15,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:42:15,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-14 17:42:15,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-14 17:42:15,556 INFO L130 BoogieDeclarations]: Found specification of procedure device_unlock [2021-12-14 17:42:15,557 INFO L138 BoogieDeclarations]: Found implementation of procedure device_unlock [2021-12-14 17:42:15,557 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:42:15,557 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:42:15,557 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-12-14 17:42:15,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-12-14 17:42:15,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:42:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_skb [2021-12-14 17:42:15,558 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_skb [2021-12-14 17:42:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:42:15,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:42:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-14 17:42:15,558 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-14 17:42:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-12-14 17:42:15,559 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-12-14 17:42:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:42:15,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:42:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_rx_cb [2021-12-14 17:42:15,559 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_rx_cb [2021-12-14 17:42:15,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:42:15,560 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:42:15,560 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:42:15,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:42:15,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:42:15,560 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-12-14 17:42:15,560 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-12-14 17:42:15,561 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-14 17:42:15,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-14 17:42:15,561 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2021-12-14 17:42:15,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2021-12-14 17:42:15,561 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-14 17:42:15,561 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-14 17:42:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:42:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-12-14 17:42:15,562 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-12-14 17:42:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-12-14 17:42:15,562 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-12-14 17:42:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-14 17:42:15,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-14 17:42:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-14 17:42:15,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-14 17:42:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:42:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:42:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2021-12-14 17:42:15,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2021-12-14 17:42:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-14 17:42:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 17:42:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 17:42:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-12-14 17:42:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-12-14 17:42:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-14 17:42:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-14 17:42:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:42:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-12-14 17:42:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-12-14 17:42:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-14 17:42:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-14 17:42:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2021-12-14 17:42:15,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2021-12-14 17:42:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:42:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:42:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-14 17:42:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-14 17:42:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-12-14 17:42:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-12-14 17:42:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-12-14 17:42:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-12-14 17:42:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-12-14 17:42:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-12-14 17:42:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-14 17:42:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-14 17:42:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-12-14 17:42:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-12-14 17:42:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:42:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:42:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-12-14 17:42:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-12-14 17:42:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-14 17:42:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-14 17:42:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-14 17:42:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-14 17:42:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-12-14 17:42:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-12-14 17:42:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-14 17:42:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-14 17:42:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:42:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-14 17:42:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-14 17:42:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-12-14 17:42:15,576 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-12-14 17:42:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:42:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:42:15,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:42:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-12-14 17:42:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-12-14 17:42:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:42:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:42:16,064 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:42:16,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:42:16,316 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:42:16,994 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-14 17:42:33,359 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:42:33,370 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:42:33,370 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:42:33,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:42:33 BoogieIcfgContainer [2021-12-14 17:42:33,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:42:33,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:42:33,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:42:33,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:42:33,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:42:13" (1/3) ... [2021-12-14 17:42:33,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a41671f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:42:33, skipping insertion in model container [2021-12-14 17:42:33,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:15" (2/3) ... [2021-12-14 17:42:33,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a41671f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:42:33, skipping insertion in model container [2021-12-14 17:42:33,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:42:33" (3/3) ... [2021-12-14 17:42:33,379 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-14 17:42:33,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:42:33,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:42:33,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:42:33,446 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 [2021-12-14 17:42:33,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:42:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 836 states, 591 states have (on average 1.3468697123519457) internal successors, (796), 617 states have internal predecessors, (796), 190 states have call successors, (190), 55 states have call predecessors, (190), 53 states have return successors, (185), 182 states have call predecessors, (185), 185 states have call successors, (185) [2021-12-14 17:42:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 17:42:33,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:33,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:33,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash -753531349, now seen corresponding path program 1 times [2021-12-14 17:42:33,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:33,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529237561] [2021-12-14 17:42:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:33,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:42:34,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529237561] [2021-12-14 17:42:34,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529237561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:34,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:34,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:42:34,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062429487] [2021-12-14 17:42:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:34,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:42:34,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:42:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:42:34,172 INFO L87 Difference]: Start difference. First operand has 836 states, 591 states have (on average 1.3468697123519457) internal successors, (796), 617 states have internal predecessors, (796), 190 states have call successors, (190), 55 states have call predecessors, (190), 53 states have return successors, (185), 182 states have call predecessors, (185), 185 states have call successors, (185) Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:42:36,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:38,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:40,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:43,220 INFO L93 Difference]: Finished difference Result 2794 states and 4030 transitions. [2021-12-14 17:42:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:42:43,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-14 17:42:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:43,256 INFO L225 Difference]: With dead ends: 2794 [2021-12-14 17:42:43,256 INFO L226 Difference]: Without dead ends: 1941 [2021-12-14 17:42:43,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:43,274 INFO L933 BasicCegarLoop]: 1231 mSDtfsCounter, 2235 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 1237 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1237 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:43,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2352 Valid, 3329 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1237 Valid, 1133 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2021-12-14 17:42:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-12-14 17:42:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1612. [2021-12-14 17:42:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1146 states have (on average 1.3342059336823735) internal successors, (1529), 1180 states have internal predecessors, (1529), 362 states have call successors, (362), 104 states have call predecessors, (362), 103 states have return successors, (357), 351 states have call predecessors, (357), 357 states have call successors, (357) [2021-12-14 17:42:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2248 transitions. [2021-12-14 17:42:43,490 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2248 transitions. Word has length 28 [2021-12-14 17:42:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2248 transitions. [2021-12-14 17:42:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:42:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2248 transitions. [2021-12-14 17:42:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 17:42:43,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:43,498 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:42:43,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:42:43,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -829331153, now seen corresponding path program 1 times [2021-12-14 17:42:43,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797661252] [2021-12-14 17:42:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:43,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:43,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:43,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:42:43,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:43,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797661252] [2021-12-14 17:42:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797661252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:43,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:43,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:42:43,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406493561] [2021-12-14 17:42:43,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:43,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:42:43,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:43,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:42:43,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:42:43,768 INFO L87 Difference]: Start difference. First operand 1612 states and 2248 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:42:45,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:47,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:49,503 INFO L93 Difference]: Finished difference Result 1967 states and 2756 transitions. [2021-12-14 17:42:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:42:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-14 17:42:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:49,513 INFO L225 Difference]: With dead ends: 1967 [2021-12-14 17:42:49,514 INFO L226 Difference]: Without dead ends: 1954 [2021-12-14 17:42:49,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:49,515 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1682 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 710 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1778 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:49,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1778 Valid, 2178 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 569 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-12-14 17:42:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-12-14 17:42:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1612. [2021-12-14 17:42:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1146 states have (on average 1.3333333333333333) internal successors, (1528), 1180 states have internal predecessors, (1528), 362 states have call successors, (362), 104 states have call predecessors, (362), 103 states have return successors, (357), 351 states have call predecessors, (357), 357 states have call successors, (357) [2021-12-14 17:42:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2247 transitions. [2021-12-14 17:42:49,593 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2247 transitions. Word has length 38 [2021-12-14 17:42:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:49,594 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2247 transitions. [2021-12-14 17:42:49,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:42:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2247 transitions. [2021-12-14 17:42:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 17:42:49,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:49,598 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:42:49,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:42:49,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -772072851, now seen corresponding path program 1 times [2021-12-14 17:42:49,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029549526] [2021-12-14 17:42:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:49,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:49,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:49,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:42:49,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029549526] [2021-12-14 17:42:49,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029549526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:49,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:49,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:42:49,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817934822] [2021-12-14 17:42:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:49,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:42:49,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:42:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:42:49,920 INFO L87 Difference]: Start difference. First operand 1612 states and 2247 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:42:51,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:53,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:56,723 INFO L93 Difference]: Finished difference Result 5452 states and 7784 transitions. [2021-12-14 17:42:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:42:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-14 17:42:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:56,748 INFO L225 Difference]: With dead ends: 5452 [2021-12-14 17:42:56,749 INFO L226 Difference]: Without dead ends: 3858 [2021-12-14 17:42:56,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:56,764 INFO L933 BasicCegarLoop]: 1335 mSDtfsCounter, 2074 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 1169 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:56,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2184 Valid, 3557 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 1187 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-12-14 17:42:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2021-12-14 17:42:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3195. [2021-12-14 17:42:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 2274 states have (on average 1.3324538258575198) internal successors, (3030), 2338 states have internal predecessors, (3030), 716 states have call successors, (716), 205 states have call predecessors, (716), 204 states have return successors, (745), 699 states have call predecessors, (745), 711 states have call successors, (745) [2021-12-14 17:42:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4491 transitions. [2021-12-14 17:42:56,919 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4491 transitions. Word has length 38 [2021-12-14 17:42:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:56,919 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4491 transitions. [2021-12-14 17:42:56,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:42:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4491 transitions. [2021-12-14 17:42:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 17:42:56,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:56,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:56,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:42:56,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1835132963, now seen corresponding path program 1 times [2021-12-14 17:42:56,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:56,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914669021] [2021-12-14 17:42:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:56,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:57,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:42:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:42:57,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:57,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914669021] [2021-12-14 17:42:57,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914669021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:57,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:57,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:42:57,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505174600] [2021-12-14 17:42:57,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:57,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:42:57,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:42:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:42:57,168 INFO L87 Difference]: Start difference. First operand 3195 states and 4491 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:42:59,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:43:01,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:43:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:43:04,025 INFO L93 Difference]: Finished difference Result 10841 states and 15828 transitions. [2021-12-14 17:43:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:43:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-14 17:43:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:43:04,071 INFO L225 Difference]: With dead ends: 10841 [2021-12-14 17:43:04,072 INFO L226 Difference]: Without dead ends: 7664 [2021-12-14 17:43:04,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:43:04,090 INFO L933 BasicCegarLoop]: 1295 mSDtfsCounter, 2192 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 1234 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 3496 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1234 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:43:04,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2296 Valid, 3496 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1234 Valid, 1181 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-12-14 17:43:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-12-14 17:43:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 6530. [2021-12-14 17:43:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 4659 states have (on average 1.3243185232882593) internal successors, (6170), 4783 states have internal predecessors, (6170), 1440 states have call successors, (1440), 407 states have call predecessors, (1440), 430 states have return successors, (1683), 1435 states have call predecessors, (1683), 1435 states have call successors, (1683) [2021-12-14 17:43:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 9293 transitions. [2021-12-14 17:43:04,386 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 9293 transitions. Word has length 39 [2021-12-14 17:43:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:43:04,388 INFO L470 AbstractCegarLoop]: Abstraction has 6530 states and 9293 transitions. [2021-12-14 17:43:04,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:43:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 9293 transitions. [2021-12-14 17:43:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 17:43:04,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:43:04,389 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:43:04,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:43:04,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:43:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:43:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1054139440, now seen corresponding path program 1 times [2021-12-14 17:43:04,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:43:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396655182] [2021-12-14 17:43:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:43:04,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:43:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:04,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:43:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:43:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:43:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:43:04,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:43:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396655182] [2021-12-14 17:43:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396655182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:43:04,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:43:04,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:43:04,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820083215] [2021-12-14 17:43:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:43:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:43:04,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:43:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:43:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:43:04,642 INFO L87 Difference]: Start difference. First operand 6530 states and 9293 transitions. 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:43:06,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:43:08,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:43:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:43:11,240 INFO L93 Difference]: Finished difference Result 7662 states and 11141 transitions. [2021-12-14 17:43:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:43:11,241 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-14 17:43:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:43:11,281 INFO L225 Difference]: With dead ends: 7662 [2021-12-14 17:43:11,282 INFO L226 Difference]: Without dead ends: 7659 [2021-12-14 17:43:11,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:43:11,288 INFO L933 BasicCegarLoop]: 1292 mSDtfsCounter, 2195 mSDsluCounter, 2198 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 1240 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1240 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:43:11,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2298 Valid, 3490 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1240 Valid, 1162 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-14 17:43:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2021-12-14 17:43:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 6531. [2021-12-14 17:43:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 4660 states have (on average 1.3242489270386266) internal successors, (6171), 4784 states have internal predecessors, (6171), 1440 states have call successors, (1440), 407 states have call predecessors, (1440), 430 states have return successors, (1683), 1435 states have call predecessors, (1683), 1435 states have call successors, (1683) [2021-12-14 17:43:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 9294 transitions. [2021-12-14 17:43:11,594 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 9294 transitions. Word has length 40 [2021-12-14 17:43:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:43:11,594 INFO L470 AbstractCegarLoop]: Abstraction has 6531 states and 9294 transitions. [2021-12-14 17:43:11,595 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:43:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 9294 transitions. [2021-12-14 17:43:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 17:43:11,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:43:11,597 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:43:11,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:43:11,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:43:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:43:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1681818426, now seen corresponding path program 1 times [2021-12-14 17:43:11,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:43:11,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969369965] [2021-12-14 17:43:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:43:11,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:43:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:43:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:11,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:43:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:43:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:43:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:43:11,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:43:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969369965] [2021-12-14 17:43:11,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969369965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:43:11,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:43:11,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:43:11,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345334440] [2021-12-14 17:43:11,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:43:11,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:43:11,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:43:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:43:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:43:11,875 INFO L87 Difference]: Start difference. First operand 6531 states and 9294 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 17:43:13,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []