./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 e19ca921 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-e19ca92 [2021-12-22 14:23:00,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:23:00,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:23:00,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:23:00,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:23:00,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:23:00,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:23:00,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:23:00,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:23:00,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:23:00,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:23:00,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:23:00,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:23:00,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:23:00,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:23:00,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:23:00,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:23:00,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:23:00,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:23:00,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:23:00,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:23:00,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:23:00,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:23:00,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:23:00,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:23:00,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:23:00,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:23:00,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:23:00,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:23:00,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:23:00,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:23:00,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:23:00,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:23:00,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:23:00,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:23:00,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:23:00,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:23:00,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:23:00,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:23:00,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:23:00,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:23:00,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:23:00,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:23:00,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:23:00,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:23:00,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:23:00,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:23:00,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:23:00,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:23:00,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:23:00,353 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:23:00,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:23:00,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:23:00,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:23:00,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:23:00,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:23:00,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:23:00,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:23:00,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:23:00,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:23:00,355 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:23:00,363 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:23:00,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:23:00,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:23:00,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2021-12-22 14:23:00,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:23:00,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:23:00,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:23:00,553 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:23:00,553 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:23:00,554 INFO L432 ainManager$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 [2021-12-22 14:23:00,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a71e72724/bd93c374b800417d99ff955d1cac9a35/FLAG233d9efb9 [2021-12-22 14:23:01,155 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:23:01,155 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 [2021-12-22 14:23:01,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a71e72724/bd93c374b800417d99ff955d1cac9a35/FLAG233d9efb9 [2021-12-22 14:23:01,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a71e72724/bd93c374b800417d99ff955d1cac9a35 [2021-12-22 14:23:01,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:23:01,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:23:01,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:23:01,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:23:01,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:23:01,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:23:01" (1/1) ... [2021-12-22 14:23:01,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67aab016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:01, skipping insertion in model container [2021-12-22 14:23:01,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:23:01" (1/1) ... [2021-12-22 14:23:01,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:23:01,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:23:02,370 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] [2021-12-22 14:23:02,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:23:02,412 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:23:02,580 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] [2021-12-22 14:23:02,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:23:02,635 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:23:02,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02 WrapperNode [2021-12-22 14:23:02,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:23:02,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:23:02,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:23:02,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:23:02,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,836 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-22 14:23:02,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:23:02,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:23:02,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:23:02,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:23:02,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:03,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:23:03,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:23:03,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:23:03,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:23:03,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:03,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:23:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:23:03,029 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) [2021-12-22 14:23:03,074 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 [2021-12-22 14:23:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-22 14:23:03,090 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-22 14:23:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-22 14:23:03,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-22 14:23:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-22 14:23:03,091 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-22 14:23:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:23:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:23:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:23:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:23:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-22 14:23:03,091 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-22 14:23:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-22 14:23:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-22 14:23:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:23:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:23:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-22 14:23:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-22 14:23:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-22 14:23:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-22 14:23:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-22 14:23:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-22 14:23:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:23:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:23:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-22 14:23:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-22 14:23:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-22 14:23:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-22 14:23:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-22 14:23:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-22 14:23:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-22 14:23:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-22 14:23:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-22 14:23:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-22 14:23:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-22 14:23:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-22 14:23:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-22 14:23:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-22 14:23:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:23:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-22 14:23:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-22 14:23:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:23:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:23:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-22 14:23:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-22 14:23:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-22 14:23:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-22 14:23:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-22 14:23:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-22 14:23:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-22 14:23:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-22 14:23:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:23:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:23:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-22 14:23:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-22 14:23:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:23:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-22 14:23:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-22 14:23:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-22 14:23:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-22 14:23:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 14:23:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 14:23:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-22 14:23:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-22 14:23:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-22 14:23:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-22 14:23:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:23:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-22 14:23:03,101 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-22 14:23:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-22 14:23:03,101 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-22 14:23:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:23:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:23:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-22 14:23:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-22 14:23:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-22 14:23:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-22 14:23:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-22 14:23:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-22 14:23:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-22 14:23:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:23:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-22 14:23:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-22 14:23:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-22 14:23:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-22 14:23:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-22 14:23:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-22 14:23:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-22 14:23:03,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-22 14:23:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-22 14:23:03,104 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-22 14:23:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-22 14:23:03,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-22 14:23:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-22 14:23:03,105 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-22 14:23:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 14:23:03,105 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 14:23:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-22 14:23:03,106 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-22 14:23:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-22 14:23:03,106 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-22 14:23:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:23:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:23:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-22 14:23:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-22 14:23:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-22 14:23:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-22 14:23:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-22 14:23:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-22 14:23:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-22 14:23:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-22 14:23:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-22 14:23:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-22 14:23:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-22 14:23:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-22 14:23:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-22 14:23:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-22 14:23:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-22 14:23:03,109 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-22 14:23:03,111 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-22 14:23:03,111 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-22 14:23:03,111 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-22 14:23:03,111 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-22 14:23:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-22 14:23:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-22 14:23:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-22 14:23:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-22 14:23:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-22 14:23:03,117 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-22 14:23:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-22 14:23:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-22 14:23:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-22 14:23:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-22 14:23:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-22 14:23:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-22 14:23:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:23:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-22 14:23:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-22 14:23:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-22 14:23:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-22 14:23:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:23:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-22 14:23:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-22 14:23:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-22 14:23:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-22 14:23:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:23:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:23:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-22 14:23:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-22 14:23:03,590 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:23:03,592 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:23:15,869 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:23:15,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:23:15,884 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:23:15,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:23:15 BoogieIcfgContainer [2021-12-22 14:23:15,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:23:15,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:23:15,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:23:15,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:23:15,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:23:01" (1/3) ... [2021-12-22 14:23:15,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71233e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:23:15, skipping insertion in model container [2021-12-22 14:23:15,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (2/3) ... [2021-12-22 14:23:15,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71233e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:23:15, skipping insertion in model container [2021-12-22 14:23:15,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:23:15" (3/3) ... [2021-12-22 14:23:15,892 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-22 14:23:15,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:23:15,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:23:15,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:23:15,932 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 [2021-12-22 14:23:15,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:23:16,001 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) [2021-12-22 14:23:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 14:23:16,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:16,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:23:16,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-22 14:23:16,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:16,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612532821] [2021-12-22 14:23:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:16,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:16,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:16,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612532821] [2021-12-22 14:23:16,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612532821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:16,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:16,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:23:16,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277724979] [2021-12-22 14:23:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:16,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:23:16,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:23:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:23:16,588 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) [2021-12-22 14:23:18,659 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 [] [2021-12-22 14:23:22,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:22,188 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-22 14:23:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:23:22,190 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 [2021-12-22 14:23:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:22,225 INFO L225 Difference]: With dead ends: 3954 [2021-12-22 14:23:22,225 INFO L226 Difference]: Without dead ends: 2729 [2021-12-22 14:23:22,242 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 [2021-12-22 14:23:22,245 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 2721 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:22,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 4332 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-12-22 14:23:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-22 14:23:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-22 14:23:22,404 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) [2021-12-22 14:23:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-22 14:23:22,420 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-22 14:23:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:22,421 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-22 14:23:22,421 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) [2021-12-22 14:23:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-22 14:23:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 14:23:22,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:22,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:23:22,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:23:22,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-22 14:23:22,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:22,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465225771] [2021-12-22 14:23:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:22,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:22,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:22,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465225771] [2021-12-22 14:23:22,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465225771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:22,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:22,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:23:22,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534441027] [2021-12-22 14:23:22,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:22,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:23:22,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:23:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:23:22,606 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) [2021-12-22 14:23:24,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:23:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:27,975 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-22 14:23:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:23:27,975 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 [2021-12-22 14:23:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:28,004 INFO L225 Difference]: With dead ends: 6504 [2021-12-22 14:23:28,005 INFO L226 Difference]: Without dead ends: 5418 [2021-12-22 14:23:28,010 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 [2021-12-22 14:23:28,011 INFO L933 BasicCegarLoop]: 2800 mSDtfsCounter, 2384 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 5384 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:28,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2676 Valid, 5384 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-22 14:23:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-22 14:23:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-22 14:23:28,128 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) [2021-12-22 14:23:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-22 14:23:28,145 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-22 14:23:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:28,145 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-22 14:23:28,146 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) [2021-12-22 14:23:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-22 14:23:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 14:23:28,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:28,147 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] [2021-12-22 14:23:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:23:28,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-22 14:23:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:28,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795531605] [2021-12-22 14:23:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:28,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:28,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:28,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:28,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:23:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:28,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:23:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:28,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:28,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795531605] [2021-12-22 14:23:28,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795531605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:28,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:28,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:23:28,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545733691] [2021-12-22 14:23:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:28,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:23:28,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:23:28,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:23:28,350 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) [2021-12-22 14:23:30,385 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 [] [2021-12-22 14:23:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:34,354 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-22 14:23:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:23:34,355 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 [2021-12-22 14:23:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:34,415 INFO L225 Difference]: With dead ends: 11851 [2021-12-22 14:23:34,416 INFO L226 Difference]: Without dead ends: 10750 [2021-12-22 14:23:34,428 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 [2021-12-22 14:23:34,428 INFO L933 BasicCegarLoop]: 2261 mSDtfsCounter, 2626 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2917 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:34,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2917 Valid, 4417 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-12-22 14:23:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-22 14:23:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-22 14:23:34,731 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) [2021-12-22 14:23:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-22 14:23:34,753 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-22 14:23:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:34,753 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-22 14:23:34,753 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) [2021-12-22 14:23:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-22 14:23:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 14:23:34,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:34,758 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] [2021-12-22 14:23:34,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:23:34,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-22 14:23:34,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564482843] [2021-12-22 14:23:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:34,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:35,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:35,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 14:23:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:35,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:23:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:35,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:35,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564482843] [2021-12-22 14:23:35,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564482843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:35,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:35,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 14:23:35,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669190477] [2021-12-22 14:23:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:35,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 14:23:35,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 14:23:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:23:35,511 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) [2021-12-22 14:23:37,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:23:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:54,196 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-12-22 14:23:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 14:23:54,197 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 38 [2021-12-22 14:23:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:54,297 INFO L225 Difference]: With dead ends: 22061 [2021-12-22 14:23:54,298 INFO L226 Difference]: Without dead ends: 16650 [2021-12-22 14:23:54,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-22 14:23:54,326 INFO L933 BasicCegarLoop]: 2613 mSDtfsCounter, 3303 mSDsluCounter, 24820 mSDsCounter, 0 mSdLazyCounter, 8542 mSolverCounterSat, 1477 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3600 SdHoareTripleChecker+Valid, 27433 SdHoareTripleChecker+Invalid, 10020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 8542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:54,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3600 Valid, 27433 Invalid, 10020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1477 Valid, 8542 Invalid, 1 Unknown, 0 Unchecked, 17.5s Time] [2021-12-22 14:23:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-12-22 14:23:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-12-22 14:23:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10978 states, 7469 states have (on average 1.3542642924086223) internal successors, (10115), 7739 states have internal predecessors, (10115), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2021-12-22 14:23:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-12-22 14:23:54,893 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-12-22 14:23:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:54,893 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-12-22 14:23:54,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-12-22 14:23:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-12-22 14:23:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 14:23:54,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:54,896 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:23:54,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:23:54,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-12-22 14:23:54,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:54,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042277098] [2021-12-22 14:23:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:54,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:55,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:23:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:23:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:23:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:23:56,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042277098] [2021-12-22 14:23:56,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042277098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:56,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:56,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-22 14:23:56,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954944649] [2021-12-22 14:23:56,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:56,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 14:23:56,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:56,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 14:23:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-22 14:23:56,091 INFO L87 Difference]: Start difference. First operand 10978 states and 15913 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 14:23:58,160 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 []