./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.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 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:41:13,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:41:13,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:41:13,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:41:13,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:41:13,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:41:13,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:41:13,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:41:13,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:41:13,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:41:13,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:41:13,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:41:13,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:41:13,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:41:13,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:41:13,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:41:13,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:41:13,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:41:13,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:41:13,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:41:13,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:41:13,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:41:13,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:41:13,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:41:13,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:41:13,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:41:13,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:41:13,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:41:13,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:41:13,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:41:13,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:41:13,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:41:13,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:41:13,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:41:13,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:41:13,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:41:13,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:41:13,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:41:13,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:41:13,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:41:13,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:41:13,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:41:13,904 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:41:13,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:41:13,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:41:13,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:41:13,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:41:13,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:41:13,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:41:13,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:41:13,909 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:41:13,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:41:13,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:41:13,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:41:13,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:41:13,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:41:13,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:41:13,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:41:13,911 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:41:13,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:41:13,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:41:13,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:41:13,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:41:13,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:41:13,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:41:13,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:41:13,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2021-12-28 03:41:14,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:41:14,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:41:14,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:41:14,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:41:14,299 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:41:14,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-28 03:41:14,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb65a85c/ec8d8a7add6a443d99466cc5c336f19f/FLAG34d1e408c [2021-12-28 03:41:14,910 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:41:14,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-28 03:41:14,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb65a85c/ec8d8a7add6a443d99466cc5c336f19f/FLAG34d1e408c [2021-12-28 03:41:15,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb65a85c/ec8d8a7add6a443d99466cc5c336f19f [2021-12-28 03:41:15,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:41:15,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:41:15,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:41:15,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:41:15,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:41:15,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:41:15" (1/1) ... [2021-12-28 03:41:15,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4213de78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:15, skipping insertion in model container [2021-12-28 03:41:15,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:41:15" (1/1) ... [2021-12-28 03:41:15,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:41:15,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:41:16,257 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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-12-28 03:41:16,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:41:16,312 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:41:16,479 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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-12-28 03:41:16,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:41:16,535 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:41:16,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16 WrapperNode [2021-12-28 03:41:16,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:41:16,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:41:16,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:41:16,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:41:16,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,717 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-28 03:41:16,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:41:16,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:41:16,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:41:16,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:41:16,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:41:16,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:41:16,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:41:16,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:41:16,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (1/1) ... [2021-12-28 03:41:16,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:41:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:41:16,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:41:17,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:41:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-28 03:41:17,044 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-28 03:41:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-28 03:41:17,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-28 03:41:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-28 03:41:17,044 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-28 03:41:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:41:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:41:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:41:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:41:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-28 03:41:17,045 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-28 03:41:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-28 03:41:17,045 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-28 03:41:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:41:17,045 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:41:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-28 03:41:17,045 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-28 03:41:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-28 03:41:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-28 03:41:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-28 03:41:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-28 03:41:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:41:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:41:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-28 03:41:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-28 03:41:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-28 03:41:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-28 03:41:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-28 03:41:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-28 03:41:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-28 03:41:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-28 03:41:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-28 03:41:17,048 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-28 03:41:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-28 03:41:17,048 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-28 03:41:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-28 03:41:17,048 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-28 03:41:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:41:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 03:41:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 03:41:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:41:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:41:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-28 03:41:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-28 03:41:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-28 03:41:17,050 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-28 03:41:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-28 03:41:17,050 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-28 03:41:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-28 03:41:17,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-28 03:41:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:41:17,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:41:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-28 03:41:17,051 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-28 03:41:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:41:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-28 03:41:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-28 03:41:17,052 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-28 03:41:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-28 03:41:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-28 03:41:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-28 03:41:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-28 03:41:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-28 03:41:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-28 03:41:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-28 03:41:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:41:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-28 03:41:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-28 03:41:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-28 03:41:17,054 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-28 03:41:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:41:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:41:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-28 03:41:17,054 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-28 03:41:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-28 03:41:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-28 03:41:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-28 03:41:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-28 03:41:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-28 03:41:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:41:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-28 03:41:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-28 03:41:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-28 03:41:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-28 03:41:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-28 03:41:17,056 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-28 03:41:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-28 03:41:17,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-28 03:41:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-28 03:41:17,056 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-28 03:41:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-28 03:41:17,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-28 03:41:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-28 03:41:17,057 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-28 03:41:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-28 03:41:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-28 03:41:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-28 03:41:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-28 03:41:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-28 03:41:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-28 03:41:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:41:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:41:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-28 03:41:17,059 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-28 03:41:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 03:41:17,059 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 03:41:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-28 03:41:17,059 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-28 03:41:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-28 03:41:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-28 03:41:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-28 03:41:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-28 03:41:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-28 03:41:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-28 03:41:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-28 03:41:17,061 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-28 03:41:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-28 03:41:17,061 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-28 03:41:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-28 03:41:17,063 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-28 03:41:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-28 03:41:17,063 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-28 03:41:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-28 03:41:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-28 03:41:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-28 03:41:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-28 03:41:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-28 03:41:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-28 03:41:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:41:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:41:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-28 03:41:17,070 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-28 03:41:17,516 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:41:17,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:41:30,355 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:41:30,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:41:30,384 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:41:30,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:41:30 BoogieIcfgContainer [2021-12-28 03:41:30,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:41:30,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:41:30,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:41:30,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:41:30,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:41:15" (1/3) ... [2021-12-28 03:41:30,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc296fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:41:30, skipping insertion in model container [2021-12-28 03:41:30,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:16" (2/3) ... [2021-12-28 03:41:30,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc296fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:41:30, skipping insertion in model container [2021-12-28 03:41:30,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:41:30" (3/3) ... [2021-12-28 03:41:30,419 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-28 03:41:30,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:41:30,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:41:30,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:41:30,549 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:41:30,556 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:41:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2021-12-28 03:41:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 03:41:30,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:30,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:41:30,601 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-28 03:41:30,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:30,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715201316] [2021-12-28 03:41:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:30,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:31,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:31,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715201316] [2021-12-28 03:41:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715201316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:31,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:31,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:41:31,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040797737] [2021-12-28 03:41:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:31,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:41:31,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:41:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:41:31,191 INFO L87 Difference]: Start difference. First operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:41:33,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:41:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:41:37,350 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-28 03:41:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:41:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-28 03:41:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:41:37,408 INFO L225 Difference]: With dead ends: 3954 [2021-12-28 03:41:37,408 INFO L226 Difference]: Without dead ends: 2729 [2021-12-28 03:41:37,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:41:37,432 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 2721 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3015 SdHoareTripleChecker+Valid, 4087 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-28 03:41:37,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3015 Valid, 4087 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 1362 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-12-28 03:41:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-28 03:41:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-28 03:41:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1510 states have (on average 1.3543046357615893) internal successors, (2045), 1568 states have internal predecessors, (2045), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2021-12-28 03:41:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-28 03:41:37,617 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-28 03:41:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:41:37,618 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-28 03:41:37,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:41:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-28 03:41:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 03:41:37,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:37,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:41:37,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:41:37,620 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:37,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-28 03:41:37,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:37,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528208893] [2021-12-28 03:41:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:37,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:37,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:37,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:37,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528208893] [2021-12-28 03:41:37,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528208893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:37,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:37,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:41:37,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962110200] [2021-12-28 03:41:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:37,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:41:37,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:41:37,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:41:37,899 INFO L87 Difference]: Start difference. First operand 2224 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:41:39,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:41:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:41:44,371 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-28 03:41:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:41:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-28 03:41:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:41:44,402 INFO L225 Difference]: With dead ends: 6504 [2021-12-28 03:41:44,402 INFO L226 Difference]: Without dead ends: 5418 [2021-12-28 03:41:44,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:41:44,414 INFO L933 BasicCegarLoop]: 2798 mSDtfsCounter, 2384 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 790 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 5128 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:41:44,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 5128 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1391 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-12-28 03:41:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-28 03:41:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-28 03:41:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 2997 states have (on average 1.3546880213546881) internal successors, (4060), 3107 states have internal predecessors, (4060), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2021-12-28 03:41:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-28 03:41:44,566 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-28 03:41:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:41:44,566 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-28 03:41:44,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:41:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-28 03:41:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 03:41:44,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:44,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:41:44,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:41:44,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-28 03:41:44,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:44,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741699988] [2021-12-28 03:41:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:44,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:44,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:41:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:41:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:44,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:44,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741699988] [2021-12-28 03:41:44,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741699988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:44,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:44,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:41:44,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835867438] [2021-12-28 03:41:44,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:44,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:41:44,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:41:44,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:41:44,795 INFO L87 Difference]: Start difference. First operand 4408 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 03:41:46,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:41:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:41:51,286 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-28 03:41:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:41:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-12-28 03:41:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:41:51,361 INFO L225 Difference]: With dead ends: 11851 [2021-12-28 03:41:51,361 INFO L226 Difference]: Without dead ends: 10750 [2021-12-28 03:41:51,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:41:51,373 INFO L933 BasicCegarLoop]: 2259 mSDtfsCounter, 2626 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2918 SdHoareTripleChecker+Valid, 4160 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:41:51,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2918 Valid, 4160 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1383 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-12-28 03:41:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-28 03:41:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-28 03:41:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 5224 states have (on average 1.354709035222052) internal successors, (7077), 5414 states have internal predecessors, (7077), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2021-12-28 03:41:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-28 03:41:51,644 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-28 03:41:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:41:51,645 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-28 03:41:51,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 03:41:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-28 03:41:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 03:41:51,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:51,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:41:51,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:41:51,650 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-28 03:41:51,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:51,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551370524] [2021-12-28 03:41:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:51,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:52,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:52,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 03:41:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:52,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:41:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:52,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:52,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551370524] [2021-12-28 03:41:52,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551370524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:52,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:52,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 03:41:52,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321627395] [2021-12-28 03:41:52,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:52,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 03:41:52,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 03:41:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:41:52,379 INFO L87 Difference]: Start difference. First operand 7676 states and 11129 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 03:41:54,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []