./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.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-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.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 e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:20:56,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:20:56,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:20:56,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:20:56,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:20:56,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:20:56,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:20:56,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:20:56,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:20:56,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:20:56,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:20:56,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:20:56,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:20:56,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:20:56,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:20:56,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:20:56,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:20:56,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:20:56,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:20:56,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:20:56,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:20:56,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:20:56,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:20:56,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:20:56,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:20:56,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:20:56,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:20:56,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:20:56,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:20:56,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:20:56,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:20:56,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:20:56,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:20:56,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:20:56,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:20:56,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:20:56,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:20:56,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:20:56,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:20:56,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:20:56,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:20:56,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:20:56,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:20:56,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:20:56,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:20:56,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:20:56,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:20:56,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:20:56,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:20:56,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:20:56,490 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:20:56,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:20:56,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:20:56,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:20:56,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:20:56,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:20:56,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:20:56,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:20:56,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:20:56,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:20:56,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:20:56,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:20:56,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:20:56,493 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:20:56,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:20:56,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:20:56,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:20:56,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2021-12-21 16:20:56,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:20:56,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:20:56,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:20:56,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:20:56,701 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:20:56,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-21 16:20:56,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126fea084/73ee93f131484a0882c2e1d0adc5e228/FLAGe11ffe38d [2021-12-21 16:20:57,312 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:20:57,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-21 16:20:57,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126fea084/73ee93f131484a0882c2e1d0adc5e228/FLAGe11ffe38d [2021-12-21 16:20:57,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126fea084/73ee93f131484a0882c2e1d0adc5e228 [2021-12-21 16:20:57,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:20:57,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:20:57,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:20:57,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:20:57,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:20:57,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:20:57" (1/1) ... [2021-12-21 16:20:57,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67aab016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:57, skipping insertion in model container [2021-12-21 16:20:57,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:20:57" (1/1) ... [2021-12-21 16:20:57,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:20:57,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:20:58,337 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-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-12-21 16:20:58,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:20:58,715 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:20:58,795 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-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-12-21 16:20:58,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:20:58,940 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:20:58,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58 WrapperNode [2021-12-21 16:20:58,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:20:58,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:20:58,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:20:58,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:20:58,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:58,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,113 INFO L137 Inliner]: procedures = 203, calls = 1279, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3493 [2021-12-21 16:20:59,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:20:59,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:20:59,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:20:59,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:20:59,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:20:59,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:20:59,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:20:59,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:20:59,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (1/1) ... [2021-12-21 16:20:59,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:20:59,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:20:59,313 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 16:20:59,335 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 16:20:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-21 16:20:59,347 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-21 16:20:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-12-21 16:20:59,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-12-21 16:20:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:20:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:20:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:20:59,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:20:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-21 16:20:59,348 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-21 16:20:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-21 16:20:59,348 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-21 16:20:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-21 16:20:59,349 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-21 16:20:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-21 16:20:59,349 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-21 16:20:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:20:59,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:20:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-21 16:20:59,349 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-21 16:20:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-21 16:20:59,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-21 16:20:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-21 16:20:59,350 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-21 16:20:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-21 16:20:59,350 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-21 16:20:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-21 16:20:59,350 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-21 16:20:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:20:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:20:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-21 16:20:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-21 16:20:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:20:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:20:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-21 16:20:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-21 16:20:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-21 16:20:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-21 16:20:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-21 16:20:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-21 16:20:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:20:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-21 16:20:59,353 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-21 16:20:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:20:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-21 16:20:59,353 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-21 16:20:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-21 16:20:59,354 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-21 16:20:59,354 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-21 16:20:59,354 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-21 16:20:59,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-21 16:20:59,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-21 16:20:59,354 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-21 16:20:59,354 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-21 16:20:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-21 16:20:59,355 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-21 16:20:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:20:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:20:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-21 16:20:59,356 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-21 16:20:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-21 16:20:59,357 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-21 16:20:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-21 16:20:59,357 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-21 16:20:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-21 16:20:59,357 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-21 16:20:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:20:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:20:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-21 16:20:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-21 16:20:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-21 16:20:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-21 16:20:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-21 16:20:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-21 16:20:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-21 16:20:59,359 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-21 16:20:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:20:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:20:59,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:20:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-21 16:20:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-21 16:20:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-21 16:20:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-21 16:20:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-21 16:20:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-21 16:20:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:20:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:20:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-21 16:20:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-21 16:20:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:20:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:20:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-21 16:20:59,362 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-21 16:20:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-21 16:20:59,362 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-21 16:20:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:20:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-21 16:20:59,363 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-21 16:20:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-21 16:20:59,363 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-21 16:20:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-21 16:20:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-21 16:20:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:20:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:20:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-12-21 16:20:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-12-21 16:20:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:20:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-21 16:20:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-21 16:20:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-21 16:20:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-21 16:20:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-21 16:20:59,365 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-21 16:20:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-21 16:20:59,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-21 16:20:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:20:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:20:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-21 16:20:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-21 16:20:59,368 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-21 16:20:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-21 16:20:59,369 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-21 16:20:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-21 16:20:59,370 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-21 16:20:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-21 16:20:59,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-21 16:20:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-21 16:20:59,371 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-21 16:20:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-21 16:20:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-21 16:20:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-21 16:20:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-21 16:20:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-21 16:20:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-21 16:20:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-21 16:20:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-21 16:20:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-21 16:20:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-21 16:20:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-21 16:20:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-21 16:20:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-21 16:20:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-21 16:20:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-21 16:20:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-21 16:20:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-21 16:20:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-21 16:20:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:20:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-21 16:20:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-21 16:20:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:20:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:20:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-21 16:20:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-21 16:20:59,854 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:20:59,856 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:21:00,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:21:12,794 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:21:12,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:21:12,811 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:21:12,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:21:12 BoogieIcfgContainer [2021-12-21 16:21:12,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:21:12,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:21:12,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:21:12,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:21:12,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:20:57" (1/3) ... [2021-12-21 16:21:12,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be3abbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:21:12, skipping insertion in model container [2021-12-21 16:21:12,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:58" (2/3) ... [2021-12-21 16:21:12,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be3abbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:21:12, skipping insertion in model container [2021-12-21 16:21:12,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:21:12" (3/3) ... [2021-12-21 16:21:12,819 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-21 16:21:12,822 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:21:12,822 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:21:12,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:21:12,861 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 16:21:12,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:21:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) [2021-12-21 16:21:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 16:21:12,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:12,901 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:12,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1492979739, now seen corresponding path program 1 times [2021-12-21 16:21:12,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:12,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639541548] [2021-12-21 16:21:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:12,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:21:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 16:21:13,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639541548] [2021-12-21 16:21:13,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639541548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:13,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:13,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:21:13,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240689829] [2021-12-21 16:21:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:13,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:21:13,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:21:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:13,598 INFO L87 Difference]: Start difference. First operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:21:15,634 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 16:21:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:22,002 INFO L93 Difference]: Finished difference Result 4347 states and 6622 transitions. [2021-12-21 16:21:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:21:22,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2021-12-21 16:21:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:22,032 INFO L225 Difference]: With dead ends: 4347 [2021-12-21 16:21:22,032 INFO L226 Difference]: Without dead ends: 3058 [2021-12-21 16:21:22,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:22,051 INFO L933 BasicCegarLoop]: 1902 mSDtfsCounter, 3882 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 1999 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4201 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 3576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:22,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4201 Valid, 4239 Invalid, 3576 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1999 Valid, 1576 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-12-21 16:21:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-12-21 16:21:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2334. [2021-12-21 16:21:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 1608 states have (on average 1.3600746268656716) internal successors, (2187), 1669 states have internal predecessors, (2187), 602 states have call successors, (602), 125 states have call predecessors, (602), 123 states have return successors, (590), 581 states have call predecessors, (590), 590 states have call successors, (590) [2021-12-21 16:21:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3379 transitions. [2021-12-21 16:21:22,294 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3379 transitions. Word has length 56 [2021-12-21 16:21:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:22,295 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3379 transitions. [2021-12-21 16:21:22,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:21:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3379 transitions. [2021-12-21 16:21:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 16:21:22,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:22,305 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:22,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:21:22,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -963250297, now seen corresponding path program 1 times [2021-12-21 16:21:22,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:22,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052873808] [2021-12-21 16:21:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:22,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:21:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 16:21:22,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:22,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052873808] [2021-12-21 16:21:22,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052873808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:22,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:22,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:21:22,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202656603] [2021-12-21 16:21:22,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:22,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:21:22,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:22,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:21:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:22,620 INFO L87 Difference]: Start difference. First operand 2334 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:21:24,651 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 16:21:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:32,678 INFO L93 Difference]: Finished difference Result 8380 states and 12482 transitions. [2021-12-21 16:21:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:21:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-12-21 16:21:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:32,714 INFO L225 Difference]: With dead ends: 8380 [2021-12-21 16:21:32,714 INFO L226 Difference]: Without dead ends: 6061 [2021-12-21 16:21:32,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:32,728 INFO L933 BasicCegarLoop]: 1963 mSDtfsCounter, 3190 mSDsluCounter, 2945 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 1144 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3505 SdHoareTripleChecker+Valid, 4908 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:32,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3505 Valid, 4908 Invalid, 3273 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1144 Valid, 2128 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-12-21 16:21:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-21 16:21:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4613. [2021-12-21 16:21:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 3187 states have (on average 1.3614684656416693) internal successors, (4339), 3300 states have internal predecessors, (4339), 1182 states have call successors, (1182), 247 states have call predecessors, (1182), 243 states have return successors, (1164), 1149 states have call predecessors, (1164), 1164 states have call successors, (1164) [2021-12-21 16:21:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 6685 transitions. [2021-12-21 16:21:32,896 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 6685 transitions. Word has length 57 [2021-12-21 16:21:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:32,897 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 6685 transitions. [2021-12-21 16:21:32,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:21:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 6685 transitions. [2021-12-21 16:21:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 16:21:32,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:32,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:32,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:21:32,899 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash 538243510, now seen corresponding path program 1 times [2021-12-21 16:21:32,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:32,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939014804] [2021-12-21 16:21:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:32,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:21:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:21:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 16:21:33,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939014804] [2021-12-21 16:21:33,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939014804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:33,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:33,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:21:33,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594804261] [2021-12-21 16:21:33,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:33,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:21:33,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:21:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:21:33,203 INFO L87 Difference]: Start difference. First operand 4613 states and 6685 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:21:35,227 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 16:21:37,244 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 16:21:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:42,073 INFO L93 Difference]: Finished difference Result 14993 states and 22029 transitions. [2021-12-21 16:21:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:21:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2021-12-21 16:21:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:42,132 INFO L225 Difference]: With dead ends: 14993 [2021-12-21 16:21:42,133 INFO L226 Difference]: Without dead ends: 10395 [2021-12-21 16:21:42,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:42,156 INFO L933 BasicCegarLoop]: 2053 mSDtfsCounter, 2217 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 841 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 4204 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:42,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 4204 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1309 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2021-12-21 16:21:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-12-21 16:21:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 8963. [2021-12-21 16:21:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 6186 states have (on average 1.3632395732298739) internal successors, (8433), 6394 states have internal predecessors, (8433), 2294 states have call successors, (2294), 487 states have call predecessors, (2294), 482 states have return successors, (2276), 2249 states have call predecessors, (2276), 2276 states have call successors, (2276) [2021-12-21 16:21:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 13003 transitions. [2021-12-21 16:21:42,553 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 13003 transitions. Word has length 59 [2021-12-21 16:21:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:42,554 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 13003 transitions. [2021-12-21 16:21:42,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:21:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 13003 transitions. [2021-12-21 16:21:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 16:21:42,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:42,557 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:42,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:21:42,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 661729035, now seen corresponding path program 1 times [2021-12-21 16:21:42,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:42,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926373328] [2021-12-21 16:21:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:42,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:21:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 16:21:42,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:42,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926373328] [2021-12-21 16:21:42,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926373328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:42,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:42,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:21:42,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83037615] [2021-12-21 16:21:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:42,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:21:42,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:21:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:42,847 INFO L87 Difference]: Start difference. First operand 8963 states and 13003 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 16:21:44,870 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 16:21:46,915 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 [] [2021-12-21 16:21:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:54,461 INFO L93 Difference]: Finished difference Result 32602 states and 48606 transitions. [2021-12-21 16:21:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:21:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2021-12-21 16:21:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:54,584 INFO L225 Difference]: With dead ends: 32602 [2021-12-21 16:21:54,585 INFO L226 Difference]: Without dead ends: 23651 [2021-12-21 16:21:54,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:54,626 INFO L933 BasicCegarLoop]: 1917 mSDtfsCounter, 3197 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 1157 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 4813 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:54,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3517 Valid, 4813 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1157 Valid, 2139 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2021-12-21 16:21:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23651 states. [2021-12-21 16:21:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23651 to 17850. [2021-12-21 16:21:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 12333 states have (on average 1.3637395605286629) internal successors, (16819), 12737 states have internal predecessors, (16819), 4558 states have call successors, (4558), 966 states have call predecessors, (4558), 958 states have return successors, (4538), 4482 states have call predecessors, (4538), 4538 states have call successors, (4538) [2021-12-21 16:21:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 25915 transitions. [2021-12-21 16:21:55,400 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 25915 transitions. Word has length 75 [2021-12-21 16:21:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:55,401 INFO L470 AbstractCegarLoop]: Abstraction has 17850 states and 25915 transitions. [2021-12-21 16:21:55,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 16:21:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 25915 transitions. [2021-12-21 16:21:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 16:21:55,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:55,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:55,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:21:55,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash -178671597, now seen corresponding path program 1 times [2021-12-21 16:21:55,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:55,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548407176] [2021-12-21 16:21:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:55,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:21:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:56,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 16:21:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:56,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 16:21:56,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548407176] [2021-12-21 16:21:56,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548407176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:56,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:56,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-21 16:21:56,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091252299] [2021-12-21 16:21:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:56,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 16:21:56,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 16:21:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-21 16:21:56,449 INFO L87 Difference]: Start difference. First operand 17850 states and 25915 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:21:58,481 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 []