./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 791161d1 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-?-791161d [2022-07-23 00:16:29,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 00:16:29,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 00:16:29,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 00:16:29,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 00:16:29,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 00:16:29,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 00:16:29,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 00:16:29,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 00:16:29,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 00:16:29,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 00:16:29,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 00:16:29,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 00:16:29,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 00:16:30,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 00:16:30,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 00:16:30,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 00:16:30,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 00:16:30,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 00:16:30,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 00:16:30,008 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 00:16:30,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 00:16:30,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 00:16:30,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 00:16:30,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 00:16:30,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 00:16:30,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 00:16:30,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 00:16:30,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 00:16:30,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 00:16:30,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 00:16:30,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 00:16:30,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 00:16:30,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 00:16:30,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 00:16:30,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 00:16:30,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 00:16:30,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 00:16:30,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 00:16:30,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 00:16:30,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 00:16:30,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 00:16:30,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-23 00:16:30,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 00:16:30,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 00:16:30,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 00:16:30,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 00:16:30,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 00:16:30,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 00:16:30,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 00:16:30,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 00:16:30,050 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 00:16:30,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 00:16:30,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 00:16:30,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 00:16:30,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-23 00:16:30,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 00:16:30,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-23 00:16:30,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-23 00:16:30,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 00:16:30,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-23 00:16:30,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 00:16:30,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 00:16:30,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 00:16:30,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 00:16:30,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 00:16:30,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 00:16:30,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-23 00:16:30,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 00:16:30,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 00:16:30,055 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-23 00:16:30,055 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-23 00:16:30,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-23 00:16:30,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2022-07-23 00:16:30,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 00:16:30,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 00:16:30,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 00:16:30,337 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 00:16:30,338 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 00:16:30,339 INFO L432 ainManager$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 [2022-07-23 00:16:30,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f64bf28/e62ab580062f4f34932f6f5b4b268695/FLAG4c2ab174b [2022-07-23 00:16:31,117 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 00:16:31,118 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 [2022-07-23 00:16:31,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f64bf28/e62ab580062f4f34932f6f5b4b268695/FLAG4c2ab174b [2022-07-23 00:16:31,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f64bf28/e62ab580062f4f34932f6f5b4b268695 [2022-07-23 00:16:31,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 00:16:31,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 00:16:31,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 00:16:31,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 00:16:31,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 00:16:31,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:16:31" (1/1) ... [2022-07-23 00:16:31,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c214113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:31, skipping insertion in model container [2022-07-23 00:16:31,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:16:31" (1/1) ... [2022-07-23 00:16:31,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 00:16:31,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 00:16:32,226 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] [2022-07-23 00:16:32,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 00:16:32,730 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 00:16:32,787 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] [2022-07-23 00:16:32,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 00:16:32,997 INFO L208 MainTranslator]: Completed translation [2022-07-23 00:16:32,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32 WrapperNode [2022-07-23 00:16:32,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 00:16:33,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 00:16:33,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 00:16:33,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 00:16:33,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,210 INFO L137 Inliner]: procedures = 203, calls = 1280, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3595 [2022-07-23 00:16:33,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 00:16:33,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 00:16:33,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 00:16:33,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 00:16:33,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 00:16:33,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 00:16:33,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 00:16:33,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 00:16:33,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (1/1) ... [2022-07-23 00:16:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 00:16:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:16:33,481 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) [2022-07-23 00:16:33,501 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 [2022-07-23 00:16:33,524 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-23 00:16:33,524 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-23 00:16:33,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2022-07-23 00:16:33,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2022-07-23 00:16:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-23 00:16:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-23 00:16:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-23 00:16:33,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-23 00:16:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-23 00:16:33,525 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-23 00:16:33,525 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-23 00:16:33,526 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-23 00:16:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-23 00:16:33,526 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-23 00:16:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-23 00:16:33,526 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-23 00:16:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 00:16:33,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 00:16:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-23 00:16:33,527 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-23 00:16:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-23 00:16:33,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-23 00:16:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-23 00:16:33,527 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-23 00:16:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-23 00:16:33,528 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-23 00:16:33,528 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-23 00:16:33,528 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-23 00:16:33,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-23 00:16:33,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-23 00:16:33,528 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-23 00:16:33,528 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-23 00:16:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-23 00:16:33,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-23 00:16:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-23 00:16:33,529 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-23 00:16:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-23 00:16:33,529 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-23 00:16:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-23 00:16:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-23 00:16:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 00:16:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-23 00:16:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-23 00:16:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 00:16:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-23 00:16:33,531 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-23 00:16:33,531 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-23 00:16:33,531 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-23 00:16:33,531 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-23 00:16:33,531 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-23 00:16:33,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-23 00:16:33,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-23 00:16:33,532 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-23 00:16:33,532 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-23 00:16:33,532 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-23 00:16:33,533 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-23 00:16:33,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 00:16:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 00:16:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-23 00:16:33,534 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-23 00:16:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-23 00:16:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-23 00:16:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-23 00:16:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-23 00:16:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-23 00:16:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-23 00:16:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-23 00:16:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-23 00:16:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-23 00:16:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-23 00:16:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-23 00:16:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-23 00:16:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-23 00:16:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-23 00:16:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-23 00:16:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-23 00:16:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-23 00:16:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-23 00:16:33,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-23 00:16:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-23 00:16:33,538 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-23 00:16:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-23 00:16:33,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-23 00:16:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-23 00:16:33,538 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-23 00:16:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-23 00:16:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 00:16:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-23 00:16:33,539 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-23 00:16:33,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-23 00:16:33,540 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-23 00:16:33,540 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-23 00:16:33,540 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-23 00:16:33,540 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-23 00:16:33,541 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-23 00:16:33,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 00:16:33,541 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-23 00:16:33,541 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-23 00:16:33,541 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-23 00:16:33,542 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-23 00:16:33,542 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-23 00:16:33,542 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-23 00:16:33,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-23 00:16:33,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-23 00:16:33,543 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2022-07-23 00:16:33,543 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2022-07-23 00:16:33,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 00:16:33,543 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-23 00:16:33,543 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-23 00:16:33,543 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-23 00:16:33,544 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-23 00:16:33,544 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-23 00:16:33,544 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-23 00:16:33,544 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-23 00:16:33,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-23 00:16:33,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 00:16:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 00:16:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-23 00:16:33,546 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-23 00:16:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-23 00:16:33,548 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-23 00:16:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-23 00:16:33,548 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-23 00:16:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-23 00:16:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-23 00:16:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-23 00:16:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-23 00:16:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-23 00:16:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-23 00:16:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-23 00:16:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-23 00:16:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-23 00:16:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-23 00:16:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-23 00:16:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-23 00:16:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-23 00:16:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-23 00:16:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-23 00:16:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-23 00:16:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-23 00:16:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-23 00:16:33,558 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-23 00:16:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-23 00:16:33,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-23 00:16:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-23 00:16:33,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-23 00:16:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 00:16:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-23 00:16:33,558 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-23 00:16:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 00:16:33,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 00:16:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-23 00:16:33,559 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-23 00:16:34,184 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 00:16:34,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 00:16:34,363 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-23 00:16:48,841 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 00:16:48,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 00:16:48,862 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-23 00:16:48,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 12:16:48 BoogieIcfgContainer [2022-07-23 00:16:48,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 00:16:48,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 00:16:48,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 00:16:48,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 00:16:48,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 12:16:31" (1/3) ... [2022-07-23 00:16:48,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434a706a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 12:16:48, skipping insertion in model container [2022-07-23 00:16:48,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:16:32" (2/3) ... [2022-07-23 00:16:48,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434a706a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 12:16:48, skipping insertion in model container [2022-07-23 00:16:48,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 12:16:48" (3/3) ... [2022-07-23 00:16:48,879 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-23 00:16:48,894 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 00:16:48,894 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-23 00:16:48,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 00:16:48,992 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ce14e2c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24096ad6 [2022-07-23 00:16:48,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-23 00:16:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 1328 states, 937 states have (on average 1.4130202774813234) internal successors, (1324), 980 states have internal predecessors, (1324), 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) [2022-07-23 00:16:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-23 00:16:49,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:16:49,025 INFO L195 NwaCegarLoop]: 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] [2022-07-23 00:16:49,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:16:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:16:49,039 INFO L85 PathProgramCache]: Analyzing trace with hash -826194177, now seen corresponding path program 1 times [2022-07-23 00:16:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:16:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766054211] [2022-07-23 00:16:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:16:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:16:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:16:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:16:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:16:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:16:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:16:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:16:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-23 00:16:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-23 00:16:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:16:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 00:16:50,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:16:50,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766054211] [2022-07-23 00:16:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766054211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:16:50,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:16:50,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 00:16:50,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379662227] [2022-07-23 00:16:50,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:16:50,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 00:16:50,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:16:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 00:16:50,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 00:16:50,285 INFO L87 Difference]: Start difference. First operand has 1328 states, 937 states have (on average 1.4130202774813234) internal successors, (1324), 980 states have internal predecessors, (1324), 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 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-07-23 00:16:52,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:16:54,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:17:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:17:04,441 INFO L93 Difference]: Finished difference Result 4152 states and 6323 transitions. [2022-07-23 00:17:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 00:17:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 58 [2022-07-23 00:17:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:17:04,483 INFO L225 Difference]: With dead ends: 4152 [2022-07-23 00:17:04,486 INFO L226 Difference]: Without dead ends: 2812 [2022-07-23 00:17:04,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:17:04,503 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 2405 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 871 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 4106 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-07-23 00:17:04,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2676 Valid, 4106 Invalid, 2485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [871 Valid, 1612 Invalid, 2 Unknown, 0 Unchecked, 13.5s Time] [2022-07-23 00:17:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2022-07-23 00:17:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2406. [2022-07-23 00:17:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1688 states have (on average 1.3625592417061612) internal successors, (2300), 1748 states have internal predecessors, (2300), 592 states have call successors, (592), 126 states have call predecessors, (592), 125 states have return successors, (579), 573 states have call predecessors, (579), 579 states have call successors, (579) [2022-07-23 00:17:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3471 transitions. [2022-07-23 00:17:04,822 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3471 transitions. Word has length 58 [2022-07-23 00:17:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:17:04,823 INFO L495 AbstractCegarLoop]: Abstraction has 2406 states and 3471 transitions. [2022-07-23 00:17:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-07-23 00:17:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3471 transitions. [2022-07-23 00:17:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 00:17:04,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:17:04,831 INFO L195 NwaCegarLoop]: 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] [2022-07-23 00:17:04,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 00:17:04,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:17:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:17:04,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2130658151, now seen corresponding path program 1 times [2022-07-23 00:17:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:17:04,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787662565] [2022-07-23 00:17:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:17:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:17:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:17:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:17:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:17:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:17:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:17:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:17:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:17:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 00:17:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:17:05,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787662565] [2022-07-23 00:17:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787662565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:17:05,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:17:05,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:17:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862580622] [2022-07-23 00:17:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:17:05,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:17:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:17:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:17:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:17:05,291 INFO L87 Difference]: Start difference. First operand 2406 states and 3471 transitions. 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) [2022-07-23 00:17:07,333 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 [] [2022-07-23 00:17:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:17:17,382 INFO L93 Difference]: Finished difference Result 6388 states and 9553 transitions. [2022-07-23 00:17:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 00:17:17,383 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 [2022-07-23 00:17:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:17:17,441 INFO L225 Difference]: With dead ends: 6388 [2022-07-23 00:17:17,441 INFO L226 Difference]: Without dead ends: 6364 [2022-07-23 00:17:17,452 INFO L412 NwaCegarLoop]: 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 [2022-07-23 00:17:17,453 INFO L413 NwaCegarLoop]: 1953 mSDtfsCounter, 4253 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 1977 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4575 SdHoareTripleChecker+Valid, 4140 SdHoareTripleChecker+Invalid, 3859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1977 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-07-23 00:17:17,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4575 Valid, 4140 Invalid, 3859 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1977 Valid, 1881 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-07-23 00:17:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6364 states. [2022-07-23 00:17:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6364 to 4728. [2022-07-23 00:17:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 3325 states have (on average 1.3621052631578947) internal successors, (4529), 3433 states have internal predecessors, (4529), 1158 states have call successors, (1158), 247 states have call predecessors, (1158), 244 states have return successors, (1146), 1131 states have call predecessors, (1146), 1146 states have call successors, (1146) [2022-07-23 00:17:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 6833 transitions. [2022-07-23 00:17:17,850 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 6833 transitions. Word has length 56 [2022-07-23 00:17:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:17:17,850 INFO L495 AbstractCegarLoop]: Abstraction has 4728 states and 6833 transitions. [2022-07-23 00:17:17,851 INFO L496 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) [2022-07-23 00:17:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 6833 transitions. [2022-07-23 00:17:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 00:17:17,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:17:17,857 INFO L195 NwaCegarLoop]: 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] [2022-07-23 00:17:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 00:17:17,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:17:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:17:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1626874934, now seen corresponding path program 1 times [2022-07-23 00:17:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:17:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75115894] [2022-07-23 00:17:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:17:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:17:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:17:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:17:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:17:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:17:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:17:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:17:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:17:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 00:17:18,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:17:18,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75115894] [2022-07-23 00:17:18,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75115894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:17:18,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:17:18,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:17:18,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929379737] [2022-07-23 00:17:18,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:17:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:17:18,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:17:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:17:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:17:18,345 INFO L87 Difference]: Start difference. First operand 4728 states and 6833 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) [2022-07-23 00:17:20,380 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 [] [2022-07-23 00:17:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:17:32,632 INFO L93 Difference]: Finished difference Result 17375 states and 25771 transitions. [2022-07-23 00:17:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 00:17:32,633 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 [2022-07-23 00:17:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:17:32,774 INFO L225 Difference]: With dead ends: 17375 [2022-07-23 00:17:32,796 INFO L226 Difference]: Without dead ends: 12662 [2022-07-23 00:17:32,843 INFO L412 NwaCegarLoop]: 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 [2022-07-23 00:17:32,860 INFO L413 NwaCegarLoop]: 2153 mSDtfsCounter, 3521 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 1109 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3839 SdHoareTripleChecker+Valid, 5094 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-07-23 00:17:32,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3839 Valid, 5094 Invalid, 3556 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1109 Valid, 2446 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2022-07-23 00:17:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2022-07-23 00:17:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 9387. [2022-07-23 00:17:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 6610 states have (on average 1.3629349470499244) internal successors, (9009), 6818 states have internal predecessors, (9009), 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) [2022-07-23 00:17:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 13579 transitions. [2022-07-23 00:17:33,685 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 13579 transitions. Word has length 57 [2022-07-23 00:17:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:17:33,687 INFO L495 AbstractCegarLoop]: Abstraction has 9387 states and 13579 transitions. [2022-07-23 00:17:33,687 INFO L496 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) [2022-07-23 00:17:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 13579 transitions. [2022-07-23 00:17:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-23 00:17:33,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:17:33,693 INFO L195 NwaCegarLoop]: 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] [2022-07-23 00:17:33,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 00:17:33,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:17:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:17:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1151289838, now seen corresponding path program 1 times [2022-07-23 00:17:33,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:17:33,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52736868] [2022-07-23 00:17:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:17:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:17:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:17:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:17:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:17:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:17:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:17:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:17:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:17:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-23 00:17:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:17:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 00:17:34,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:17:34,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52736868] [2022-07-23 00:17:34,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52736868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:17:34,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:17:34,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:17:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642145624] [2022-07-23 00:17:34,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:17:34,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:17:34,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:17:34,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:17:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:17:34,570 INFO L87 Difference]: Start difference. First operand 9387 states and 13579 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) [2022-07-23 00:17:36,625 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 [] [2022-07-23 00:17:38,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:17:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:17:52,070 INFO L93 Difference]: Finished difference Result 34642 states and 51390 transitions. [2022-07-23 00:17:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 00:17:52,071 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 [2022-07-23 00:17:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:17:52,390 INFO L225 Difference]: With dead ends: 34642 [2022-07-23 00:17:52,403 INFO L226 Difference]: Without dead ends: 25267 [2022-07-23 00:17:52,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 00:17:52,519 INFO L413 NwaCegarLoop]: 1986 mSDtfsCounter, 3533 mSDsluCounter, 2737 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 1163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3849 SdHoareTripleChecker+Valid, 4723 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-07-23 00:17:52,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3849 Valid, 4723 Invalid, 3623 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1163 Valid, 2458 Invalid, 2 Unknown, 0 Unchecked, 16.6s Time] [2022-07-23 00:17:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25267 states. [2022-07-23 00:17:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25267 to 18698. [2022-07-23 00:17:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18698 states, 13181 states have (on average 1.3634018663227372) internal successors, (17971), 13585 states have internal predecessors, (17971), 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) [2022-07-23 00:17:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18698 states to 18698 states and 27067 transitions. [2022-07-23 00:17:53,929 INFO L78 Accepts]: Start accepts. Automaton has 18698 states and 27067 transitions. Word has length 75 [2022-07-23 00:17:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:17:53,940 INFO L495 AbstractCegarLoop]: Abstraction has 18698 states and 27067 transitions. [2022-07-23 00:17:53,941 INFO L496 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) [2022-07-23 00:17:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 18698 states and 27067 transitions. [2022-07-23 00:17:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-23 00:17:53,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:17:53,960 INFO L195 NwaCegarLoop]: 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] [2022-07-23 00:17:53,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 00:17:53,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:17:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:17:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1212646870, now seen corresponding path program 1 times [2022-07-23 00:17:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:17:53,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143265027] [2022-07-23 00:17:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:17:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:17:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:54,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:17:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:54,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:17:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:17:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:54,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:17:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:54,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:17:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:54,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:17:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:55,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:17:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-23 00:17:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:55,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:17:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 00:17:56,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:17:56,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143265027] [2022-07-23 00:17:56,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143265027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:17:56,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:17:56,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-23 00:17:56,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727087829] [2022-07-23 00:17:56,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:17:56,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 00:17:56,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:17:56,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 00:17:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-23 00:17:56,143 INFO L87 Difference]: Start difference. First operand 18698 states and 27067 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) [2022-07-23 00:17:58,179 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 [] [2022-07-23 00:18:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:18:47,771 INFO L93 Difference]: Finished difference Result 65778 states and 98173 transitions. [2022-07-23 00:18:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 00:18:47,772 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 77 [2022-07-23 00:18:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:18:48,177 INFO L225 Difference]: With dead ends: 65778 [2022-07-23 00:18:48,178 INFO L226 Difference]: Without dead ends: 47095 [2022-07-23 00:18:48,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 00:18:48,276 INFO L413 NwaCegarLoop]: 2189 mSDtfsCounter, 5207 mSDsluCounter, 16495 mSDsCounter, 0 mSdLazyCounter, 13566 mSolverCounterSat, 2381 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5597 SdHoareTripleChecker+Valid, 18684 SdHoareTripleChecker+Invalid, 15948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2381 IncrementalHoareTripleChecker+Valid, 13566 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.3s IncrementalHoareTripleChecker+Time [2022-07-23 00:18:48,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5597 Valid, 18684 Invalid, 15948 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2381 Valid, 13566 Invalid, 1 Unknown, 0 Unchecked, 47.3s Time] [2022-07-23 00:18:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47095 states. [2022-07-23 00:18:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47095 to 32538. [2022-07-23 00:18:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32538 states, 22927 states have (on average 1.3639813320539103) internal successors, (31272), 23638 states have internal predecessors, (31272), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7813 states have call predecessors, (7954), 7912 states have call successors, (7954) [2022-07-23 00:18:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32538 states to 32538 states and 47158 transitions. [2022-07-23 00:18:50,246 INFO L78 Accepts]: Start accepts. Automaton has 32538 states and 47158 transitions. Word has length 77 [2022-07-23 00:18:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:18:50,247 INFO L495 AbstractCegarLoop]: Abstraction has 32538 states and 47158 transitions. [2022-07-23 00:18:50,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-23 00:18:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32538 states and 47158 transitions. [2022-07-23 00:18:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-23 00:18:50,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:18:50,251 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:18:50,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 00:18:50,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:18:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:18:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1467384912, now seen corresponding path program 1 times [2022-07-23 00:18:50,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:18:50,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243504419] [2022-07-23 00:18:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:18:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:18:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:18:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:18:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:18:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:18:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:18:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:18:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:18:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-23 00:18:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:18:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-23 00:18:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-23 00:18:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:18:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 00:18:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:18:50,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243504419] [2022-07-23 00:18:50,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243504419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:18:50,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:18:50,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:18:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305778159] [2022-07-23 00:18:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:18:50,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:18:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:18:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:18:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:18:50,691 INFO L87 Difference]: Start difference. First operand 32538 states and 47158 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-23 00:18:52,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:18:54,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:18:56,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:19:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:19:09,669 INFO L93 Difference]: Finished difference Result 76464 states and 112983 transitions. [2022-07-23 00:19:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 00:19:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2022-07-23 00:19:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:19:10,018 INFO L225 Difference]: With dead ends: 76464 [2022-07-23 00:19:10,019 INFO L226 Difference]: Without dead ends: 43941 [2022-07-23 00:19:10,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 00:19:10,141 INFO L413 NwaCegarLoop]: 3330 mSDtfsCounter, 2702 mSDsluCounter, 4119 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 821 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3011 SdHoareTripleChecker+Valid, 7449 SdHoareTripleChecker+Invalid, 3638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-07-23 00:19:10,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3011 Valid, 7449 Invalid, 3638 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [821 Valid, 2814 Invalid, 3 Unknown, 0 Unchecked, 17.3s Time] [2022-07-23 00:19:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43941 states. [2022-07-23 00:19:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43941 to 32519. [2022-07-23 00:19:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32519 states, 22908 states have (on average 1.3635847738781213) internal successors, (31237), 23621 states have internal predecessors, (31237), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7811 states have call predecessors, (7954), 7912 states have call successors, (7954) [2022-07-23 00:19:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32519 states to 32519 states and 47123 transitions. [2022-07-23 00:19:11,986 INFO L78 Accepts]: Start accepts. Automaton has 32519 states and 47123 transitions. Word has length 92 [2022-07-23 00:19:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:19:11,988 INFO L495 AbstractCegarLoop]: Abstraction has 32519 states and 47123 transitions. [2022-07-23 00:19:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-23 00:19:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 32519 states and 47123 transitions. [2022-07-23 00:19:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-23 00:19:12,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:19:12,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:19:12,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 00:19:12,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:19:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:19:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash -430904096, now seen corresponding path program 1 times [2022-07-23 00:19:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:19:12,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117852458] [2022-07-23 00:19:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:19:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:19:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:19:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:19:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:19:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:19:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:19:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:19:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:12,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:19:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:19:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 00:19:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:19:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 00:19:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-23 00:19:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:19:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:19:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 00:19:13,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:19:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117852458] [2022-07-23 00:19:13,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117852458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:19:13,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:19:13,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-23 00:19:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908509657] [2022-07-23 00:19:13,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:19:13,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 00:19:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:19:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 00:19:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-23 00:19:13,711 INFO L87 Difference]: Start difference. First operand 32519 states and 47123 transitions. Second operand has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-23 00:19:15,747 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 [] [2022-07-23 00:20:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:20:01,125 INFO L93 Difference]: Finished difference Result 98229 states and 146160 transitions. [2022-07-23 00:20:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-23 00:20:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 98 [2022-07-23 00:20:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:20:02,095 INFO L225 Difference]: With dead ends: 98229 [2022-07-23 00:20:02,097 INFO L226 Difference]: Without dead ends: 65725 [2022-07-23 00:20:02,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 00:20:02,234 INFO L413 NwaCegarLoop]: 2167 mSDtfsCounter, 5698 mSDsluCounter, 18134 mSDsCounter, 0 mSdLazyCounter, 14822 mSolverCounterSat, 2629 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6078 SdHoareTripleChecker+Valid, 20301 SdHoareTripleChecker+Invalid, 17452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2629 IncrementalHoareTripleChecker+Valid, 14822 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2022-07-23 00:20:02,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6078 Valid, 20301 Invalid, 17452 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2629 Valid, 14822 Invalid, 1 Unknown, 0 Unchecked, 42.4s Time] [2022-07-23 00:20:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65725 states. [2022-07-23 00:20:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65725 to 38339. [2022-07-23 00:20:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38339 states, 27008 states have (on average 1.3634848933649288) internal successors, (36825), 27850 states have internal predecessors, (36825), 9350 states have call successors, (9350), 1976 states have call predecessors, (9350), 1980 states have return successors, (9378), 9205 states have call predecessors, (9378), 9330 states have call successors, (9378) [2022-07-23 00:20:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38339 states to 38339 states and 55553 transitions. [2022-07-23 00:20:05,448 INFO L78 Accepts]: Start accepts. Automaton has 38339 states and 55553 transitions. Word has length 98 [2022-07-23 00:20:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:20:05,449 INFO L495 AbstractCegarLoop]: Abstraction has 38339 states and 55553 transitions. [2022-07-23 00:20:05,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-23 00:20:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 38339 states and 55553 transitions. [2022-07-23 00:20:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-23 00:20:05,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:20:05,472 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:20:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 00:20:05,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:20:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:20:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1168379698, now seen corresponding path program 1 times [2022-07-23 00:20:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:20:05,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615069520] [2022-07-23 00:20:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:20:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:20:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:20:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:20:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 00:20:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 00:20:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:20:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 00:20:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-23 00:20:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:20:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 00:20:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:20:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 00:20:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:06,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-23 00:20:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:07,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:20:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-23 00:20:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:07,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-23 00:20:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:20:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 00:20:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:20:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615069520] [2022-07-23 00:20:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615069520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:20:07,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:20:07,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-23 00:20:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389522909] [2022-07-23 00:20:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:20:07,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 00:20:07,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:20:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 00:20:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-23 00:20:07,601 INFO L87 Difference]: Start difference. First operand 38339 states and 55553 transitions. Second operand has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-23 00:20:09,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:20:11,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []