./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-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.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 cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:56:41,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:56:41,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:56:41,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:56:41,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:56:41,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:56:41,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:56:41,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:56:41,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:56:41,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:56:41,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:56:41,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:56:41,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:56:41,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:56:41,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:56:41,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:56:41,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:56:41,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:56:41,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:56:41,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:56:41,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:56:41,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:56:41,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:56:41,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:56:41,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:56:41,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:56:41,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:56:41,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:56:41,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:56:41,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:56:41,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:56:41,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:56:41,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:56:41,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:56:41,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:56:41,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:56:41,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:56:41,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:56:41,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:56:41,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:56:41,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:56:41,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:56:41,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:56:41,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:56:41,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:56:41,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:56:41,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:56:41,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:56:41,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:56:41,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:56:41,167 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:56:41,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:56:41,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:56:41,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:56:41,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:56:41,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:56:41,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:56:41,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:56:41,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:56:41,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:56:41,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:56:41,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:56:41,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:56:41,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:56:41,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:56:41,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:56:41,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:56:41,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:56:41,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:56:41,171 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:56:41,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:56:41,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:56:41,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:56:41,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2021-12-21 15:56:41,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:56:41,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:56:41,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:56:41,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:56:41,364 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:56:41,365 INFO L432 ainManager$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-1.i [2021-12-21 15:56:41,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68efda52c/2648e715c057453e9b615b8f7467802b/FLAG9236d8cd3 [2021-12-21 15:56:41,975 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:56:41,976 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-1.i [2021-12-21 15:56:42,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68efda52c/2648e715c057453e9b615b8f7467802b/FLAG9236d8cd3 [2021-12-21 15:56:42,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68efda52c/2648e715c057453e9b615b8f7467802b [2021-12-21 15:56:42,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:56:42,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:56:42,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:56:42,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:56:42,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:56:42,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:56:42" (1/1) ... [2021-12-21 15:56:42,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345c79b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:42, skipping insertion in model container [2021-12-21 15:56:42,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:56:42" (1/1) ... [2021-12-21 15:56:42,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:56:42,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:56:43,293 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-1.i[158757,158770] [2021-12-21 15:56:43,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:56:43,366 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:56:43,557 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-1.i[158757,158770] [2021-12-21 15:56:43,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:56:43,616 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:56:43,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43 WrapperNode [2021-12-21 15:56:43,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:56:43,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:56:43,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:56:43,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:56:43,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,814 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-21 15:56:43,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:56:43,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:56:43,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:56:43,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:56:43,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:56:43,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:56:43,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:56:43,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:56:43,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (1/1) ... [2021-12-21 15:56:43,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:56:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:56:44,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:56:44,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:56:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-21 15:56:44,041 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-21 15:56:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-21 15:56:44,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-21 15:56:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-21 15:56:44,042 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-21 15:56:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 15:56:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 15:56:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 15:56:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:56:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-21 15:56:44,042 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-21 15:56:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-21 15:56:44,043 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-21 15:56:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 15:56:44,043 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 15:56:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-21 15:56:44,043 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-21 15:56:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-21 15:56:44,044 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-21 15:56:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-21 15:56:44,044 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-21 15:56:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 15:56:44,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 15:56:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-21 15:56:44,044 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-21 15:56:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-21 15:56:44,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-21 15:56:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-21 15:56:44,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-21 15:56:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-21 15:56:44,045 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-21 15:56:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-21 15:56:44,045 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-21 15:56:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-21 15:56:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-21 15:56:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-21 15:56:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-21 15:56:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:56:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-21 15:56:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-21 15:56:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 15:56:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 15:56:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-21 15:56:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-21 15:56:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-21 15:56:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-21 15:56:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-21 15:56:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-21 15:56:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-21 15:56:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-21 15:56:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 15:56:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 15:56:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-21 15:56:44,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-21 15:56:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:56:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-21 15:56:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-21 15:56:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-21 15:56:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-21 15:56:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-21 15:56:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-21 15:56:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-21 15:56:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-21 15:56:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-21 15:56:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-21 15:56:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:56:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-21 15:56:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-21 15:56:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-21 15:56:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-21 15:56:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:56:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:56:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-21 15:56:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-21 15:56:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-21 15:56:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-21 15:56:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-21 15:56:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-21 15:56:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-21 15:56:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:56:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-21 15:56:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-21 15:56:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-21 15:56:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-21 15:56:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-21 15:56:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-21 15:56:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-21 15:56:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-21 15:56:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-21 15:56:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-21 15:56:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-21 15:56:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-21 15:56:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-21 15:56:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-21 15:56:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-21 15:56:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-21 15:56:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-21 15:56:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-21 15:56:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-21 15:56:44,057 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-21 15:56:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:56:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:56:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-21 15:56:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-21 15:56:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-21 15:56:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-21 15:56:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-21 15:56:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-21 15:56:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-21 15:56:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-21 15:56:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-21 15:56:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-21 15:56:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-21 15:56:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-21 15:56:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-21 15:56:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-21 15:56:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 15:56:44,060 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 15:56:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-21 15:56:44,062 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-21 15:56:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-21 15:56:44,062 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-21 15:56:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-21 15:56:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-21 15:56:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-21 15:56:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-21 15:56:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-21 15:56:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-21 15:56:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-21 15:56:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:56:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:56:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-21 15:56:44,069 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-21 15:56:44,628 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:56:44,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:56:57,014 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:56:57,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:56:57,026 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 15:56:57,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:56:57 BoogieIcfgContainer [2021-12-21 15:56:57,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:56:57,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:56:57,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:56:57,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:56:57,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:56:42" (1/3) ... [2021-12-21 15:56:57,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65532c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:56:57, skipping insertion in model container [2021-12-21 15:56:57,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:56:43" (2/3) ... [2021-12-21 15:56:57,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65532c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:56:57, skipping insertion in model container [2021-12-21 15:56:57,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:56:57" (3/3) ... [2021-12-21 15:56:57,035 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-21 15:56:57,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:56:57,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:56:57,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:56:57,095 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:56:57,096 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:56:57,136 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) [2021-12-21 15:56:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 15:56:57,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:56:57,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:56:57,141 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:56:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:56:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-21 15:56:57,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:56:57,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129241026] [2021-12-21 15:56:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:56:57,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:56:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:56:57,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:56:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:56:57,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:56:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:56:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:56:57,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:56:57,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129241026] [2021-12-21 15:56:57,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129241026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:56:57,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:56:57,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:56:57,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674030328] [2021-12-21 15:56:57,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:56:57,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:56:57,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:56:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:56:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:56:57,733 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) [2021-12-21 15:56:59,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 15:57:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:57:04,223 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-21 15:57:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:57:04,226 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 [2021-12-21 15:57:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:57:04,264 INFO L225 Difference]: With dead ends: 3954 [2021-12-21 15:57:04,264 INFO L226 Difference]: Without dead ends: 2729 [2021-12-21 15:57:04,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:57:04,287 INFO L933 BasicCegarLoop]: 2077 mSDtfsCounter, 2721 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 4330 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:57:04,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 4330 Invalid, 2031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-12-21 15:57:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-21 15:57:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-21 15:57:04,462 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) [2021-12-21 15:57:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-21 15:57:04,480 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-21 15:57:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:57:04,480 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-21 15:57:04,481 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) [2021-12-21 15:57:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-21 15:57:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 15:57:04,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:57:04,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:57:04,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:57:04,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:57:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:57:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-21 15:57:04,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:57:04,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969030131] [2021-12-21 15:57:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:57:04,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:57:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:04,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:57:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:57:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:57:04,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:57:04,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969030131] [2021-12-21 15:57:04,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969030131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:57:04,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:57:04,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:57:04,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198635040] [2021-12-21 15:57:04,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:57:04,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:57:04,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:57:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:57:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:57:04,740 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) [2021-12-21 15:57:06,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 15:57:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:57:11,400 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-21 15:57:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:57:11,401 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 [2021-12-21 15:57:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:57:11,431 INFO L225 Difference]: With dead ends: 6504 [2021-12-21 15:57:11,432 INFO L226 Difference]: Without dead ends: 5418 [2021-12-21 15:57:11,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:57:11,441 INFO L933 BasicCegarLoop]: 2797 mSDtfsCounter, 2384 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 5378 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:57:11,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 5378 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-12-21 15:57:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-21 15:57:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-21 15:57:11,570 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) [2021-12-21 15:57:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-21 15:57:11,590 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-21 15:57:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:57:11,590 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-21 15:57:11,590 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) [2021-12-21 15:57:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-21 15:57:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 15:57:11,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:57:11,592 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] [2021-12-21 15:57:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:57:11,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:57:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:57:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-21 15:57:11,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:57:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838113488] [2021-12-21 15:57:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:57:11,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:57:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:11,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:57:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:11,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:57:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:57:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:11,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:57:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:57:11,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:57:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838113488] [2021-12-21 15:57:11,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838113488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:57:11,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:57:11,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:57:11,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604582927] [2021-12-21 15:57:11,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:57:11,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:57:11,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:57:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:57:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:57:11,820 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) [2021-12-21 15:57:13,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 15:57:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:57:19,133 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-21 15:57:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:57:19,133 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 [2021-12-21 15:57:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:57:19,191 INFO L225 Difference]: With dead ends: 11851 [2021-12-21 15:57:19,192 INFO L226 Difference]: Without dead ends: 10750 [2021-12-21 15:57:19,206 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 [2021-12-21 15:57:19,207 INFO L933 BasicCegarLoop]: 2259 mSDtfsCounter, 2626 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2918 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-21 15:57:19,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2918 Valid, 4412 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-12-21 15:57:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-21 15:57:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-21 15:57:19,471 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) [2021-12-21 15:57:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-21 15:57:19,501 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-21 15:57:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:57:19,501 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-21 15:57:19,502 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) [2021-12-21 15:57:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-21 15:57:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 15:57:19,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:57:19,506 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] [2021-12-21 15:57:19,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:57:19,507 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:57:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:57:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-21 15:57:19,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:57:19,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083799229] [2021-12-21 15:57:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:57:19,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:57:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:19,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:57:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:57:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 15:57:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:20,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:57:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:57:20,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:57:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083799229] [2021-12-21 15:57:20,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083799229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:57:20,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:57:20,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 15:57:20,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617745783] [2021-12-21 15:57:20,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:57:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 15:57:20,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:57:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 15:57:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:57:20,476 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) [2021-12-21 15:57:22,501 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 [] [2021-12-21 15:57:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:57:39,540 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-12-21 15:57:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:57:39,540 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 [2021-12-21 15:57:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:57:39,623 INFO L225 Difference]: With dead ends: 22061 [2021-12-21 15:57:39,623 INFO L226 Difference]: Without dead ends: 16650 [2021-12-21 15:57:39,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-21 15:57:39,652 INFO L933 BasicCegarLoop]: 2611 mSDtfsCounter, 3303 mSDsluCounter, 24797 mSDsCounter, 0 mSdLazyCounter, 8542 mSolverCounterSat, 1477 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3601 SdHoareTripleChecker+Valid, 27408 SdHoareTripleChecker+Invalid, 10020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 8542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-12-21 15:57:39,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3601 Valid, 27408 Invalid, 10020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1477 Valid, 8542 Invalid, 1 Unknown, 0 Unchecked, 17.7s Time] [2021-12-21 15:57:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-12-21 15:57:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-12-21 15:57:40,128 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) [2021-12-21 15:57:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-12-21 15:57:40,168 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-12-21 15:57:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:57:40,169 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-12-21 15:57:40,170 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) [2021-12-21 15:57:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-12-21 15:57:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 15:57:40,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:57:40,173 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] [2021-12-21 15:57:40,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:57:40,173 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:57:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:57:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-12-21 15:57:40,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:57:40,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445933206] [2021-12-21 15:57:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:57:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:57:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:40,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:57:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:40,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:57:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:57:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:40,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 15:57:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:41,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:57:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:57:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:57:41,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:57:41,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445933206] [2021-12-21 15:57:41,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445933206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:57:41,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:57:41,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 15:57:41,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741415813] [2021-12-21 15:57:41,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:57:41,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 15:57:41,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:57:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 15:57:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:57:41,324 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) [2021-12-21 15:57:43,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []