./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 04:07:32,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 04:07:32,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 04:07:32,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 04:07:32,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 04:07:32,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 04:07:32,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 04:07:32,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 04:07:32,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 04:07:32,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 04:07:32,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 04:07:32,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 04:07:32,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 04:07:32,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 04:07:32,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 04:07:32,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 04:07:32,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 04:07:32,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 04:07:32,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 04:07:32,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 04:07:32,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 04:07:32,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 04:07:32,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 04:07:32,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 04:07:32,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 04:07:32,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 04:07:32,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 04:07:32,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 04:07:32,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 04:07:32,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 04:07:32,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 04:07:32,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 04:07:32,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 04:07:32,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 04:07:32,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 04:07:32,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 04:07:32,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 04:07:32,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 04:07:32,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 04:07:32,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 04:07:32,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 04:07:32,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 04:07:32,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 04:07:32,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 04:07:32,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 04:07:32,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 04:07:32,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 04:07:32,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 04:07:32,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 04:07:32,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 04:07:32,962 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 04:07:32,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 04:07:32,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 04:07:32,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 04:07:32,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 04:07:32,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 04:07:32,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 04:07:32,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 04:07:32,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 04:07:32,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 04:07:32,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 04:07:32,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 04:07:32,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 04:07:32,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 04:07:32,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 04:07:32,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 04:07:32,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 04:07:32,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 04:07:32,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 04:07:32,966 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 04:07:32,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 04:07:32,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 04:07:32,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 04:07:32,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2021-12-16 04:07:33,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 04:07:33,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 04:07:33,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 04:07:33,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 04:07:33,186 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 04:07:33,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-16 04:07:33,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a89a64889/d3d1a3cf989f4beb86197469d55f1140/FLAG9a668b694 [2021-12-16 04:07:33,817 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 04:07:33,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-16 04:07:33,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a89a64889/d3d1a3cf989f4beb86197469d55f1140/FLAG9a668b694 [2021-12-16 04:07:34,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a89a64889/d3d1a3cf989f4beb86197469d55f1140 [2021-12-16 04:07:34,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 04:07:34,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 04:07:34,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 04:07:34,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 04:07:34,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 04:07:34,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:07:34" (1/1) ... [2021-12-16 04:07:34,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5043e7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:34, skipping insertion in model container [2021-12-16 04:07:34,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:07:34" (1/1) ... [2021-12-16 04:07:34,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 04:07:34,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 04:07:34,885 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-12-16 04:07:35,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 04:07:35,330 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 04:07:35,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-12-16 04:07:35,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 04:07:35,621 INFO L208 MainTranslator]: Completed translation [2021-12-16 04:07:35,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35 WrapperNode [2021-12-16 04:07:35,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 04:07:35,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 04:07:35,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 04:07:35,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 04:07:35,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,761 INFO L137 Inliner]: procedures = 203, calls = 1279, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3493 [2021-12-16 04:07:35,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 04:07:35,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 04:07:35,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 04:07:35,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 04:07:35,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 04:07:35,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 04:07:35,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 04:07:35,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 04:07:35,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (1/1) ... [2021-12-16 04:07:35,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 04:07:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 04:07:36,008 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) [2021-12-16 04:07:36,025 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 [2021-12-16 04:07:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-16 04:07:36,058 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-16 04:07:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-12-16 04:07:36,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-12-16 04:07:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-16 04:07:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-16 04:07:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-16 04:07:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-16 04:07:36,059 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 04:07:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-16 04:07:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-16 04:07:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-16 04:07:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-16 04:07:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-16 04:07:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-16 04:07:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 04:07:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-16 04:07:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-16 04:07:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-16 04:07:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-16 04:07:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-16 04:07:36,066 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-16 04:07:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 04:07:36,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 04:07:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-16 04:07:36,067 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-16 04:07:36,541 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 04:07:36,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 04:07:36,781 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-16 04:07:49,711 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 04:07:49,727 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 04:07:49,727 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 04:07:49,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:07:49 BoogieIcfgContainer [2021-12-16 04:07:49,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 04:07:49,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 04:07:49,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 04:07:49,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 04:07:49,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 04:07:34" (1/3) ... [2021-12-16 04:07:49,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50997e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:07:49, skipping insertion in model container [2021-12-16 04:07:49,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:07:35" (2/3) ... [2021-12-16 04:07:49,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50997e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:07:49, skipping insertion in model container [2021-12-16 04:07:49,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:07:49" (3/3) ... [2021-12-16 04:07:49,736 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-16 04:07:49,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 04:07:49,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 04:07:49,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 04:07:49,799 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 [2021-12-16 04:07:49,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 04:07:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) [2021-12-16 04:07:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 04:07:49,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:07:49,855 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:07:49,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:07:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:07:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1492979739, now seen corresponding path program 1 times [2021-12-16 04:07:49,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:07:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642641597] [2021-12-16 04:07:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:07:49,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:07:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:07:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 04:07:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 04:07:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 04:07:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 04:07:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 04:07:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 04:07:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 04:07:50,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:07:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642641597] [2021-12-16 04:07:50,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642641597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:07:50,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:07:50,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 04:07:50,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782922121] [2021-12-16 04:07:50,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:07:50,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 04:07:50,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:07:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 04:07:50,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 04:07:50,461 INFO L87 Difference]: Start difference. First operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 04:07:52,542 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 [] [2021-12-16 04:07:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:07:58,690 INFO L93 Difference]: Finished difference Result 4347 states and 6622 transitions. [2021-12-16 04:07:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 04:07:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2021-12-16 04:07:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:07:58,754 INFO L225 Difference]: With dead ends: 4347 [2021-12-16 04:07:58,754 INFO L226 Difference]: Without dead ends: 3058 [2021-12-16 04:07:58,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 04:07:58,769 INFO L933 BasicCegarLoop]: 1899 mSDtfsCounter, 3882 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 1999 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4203 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 3575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-16 04:07:58,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4203 Valid, 4234 Invalid, 3575 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1999 Valid, 1575 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-12-16 04:07:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-12-16 04:07:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2334. [2021-12-16 04:07:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 1608 states have (on average 1.3600746268656716) internal successors, (2187), 1669 states have internal predecessors, (2187), 602 states have call successors, (602), 125 states have call predecessors, (602), 123 states have return successors, (590), 581 states have call predecessors, (590), 590 states have call successors, (590) [2021-12-16 04:07:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3379 transitions. [2021-12-16 04:07:58,973 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3379 transitions. Word has length 56 [2021-12-16 04:07:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:07:58,975 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3379 transitions. [2021-12-16 04:07:58,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 04:07:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3379 transitions. [2021-12-16 04:07:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 04:07:58,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:07:58,981 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:07:58,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 04:07:58,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:07:58,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:07:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash -963250297, now seen corresponding path program 1 times [2021-12-16 04:07:58,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:07:58,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806979970] [2021-12-16 04:07:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:07:58,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:07:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:07:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 04:07:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 04:07:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 04:07:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 04:07:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 04:07:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 04:07:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:07:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 04:07:59,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:07:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806979970] [2021-12-16 04:07:59,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806979970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:07:59,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:07:59,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 04:07:59,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333100958] [2021-12-16 04:07:59,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:07:59,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 04:07:59,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:07:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 04:07:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 04:07:59,297 INFO L87 Difference]: Start difference. First operand 2334 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 04:08:01,324 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 [] [2021-12-16 04:08:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:08:10,167 INFO L93 Difference]: Finished difference Result 8380 states and 12482 transitions. [2021-12-16 04:08:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 04:08:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-12-16 04:08:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:08:10,232 INFO L225 Difference]: With dead ends: 8380 [2021-12-16 04:08:10,232 INFO L226 Difference]: Without dead ends: 6061 [2021-12-16 04:08:10,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 04:08:10,245 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 3190 mSDsluCounter, 2938 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 1144 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 4898 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-12-16 04:08:10,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3506 Valid, 4898 Invalid, 3272 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1144 Valid, 2127 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-12-16 04:08:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-16 04:08:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4613. [2021-12-16 04:08:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 3187 states have (on average 1.3614684656416693) internal successors, (4339), 3300 states have internal predecessors, (4339), 1182 states have call successors, (1182), 247 states have call predecessors, (1182), 243 states have return successors, (1164), 1149 states have call predecessors, (1164), 1164 states have call successors, (1164) [2021-12-16 04:08:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 6685 transitions. [2021-12-16 04:08:10,427 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 6685 transitions. Word has length 57 [2021-12-16 04:08:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:08:10,428 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 6685 transitions. [2021-12-16 04:08:10,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 04:08:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 6685 transitions. [2021-12-16 04:08:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 04:08:10,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:08:10,429 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:08:10,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 04:08:10,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:08:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:08:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 538243510, now seen corresponding path program 1 times [2021-12-16 04:08:10,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:08:10,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783725664] [2021-12-16 04:08:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:08:10,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:08:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:08:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 04:08:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 04:08:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 04:08:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 04:08:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 04:08:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 04:08:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 04:08:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 04:08:10,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:08:10,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783725664] [2021-12-16 04:08:10,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783725664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:08:10,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:08:10,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 04:08:10,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608573452] [2021-12-16 04:08:10,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:08:10,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 04:08:10,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:08:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 04:08:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 04:08:10,708 INFO L87 Difference]: Start difference. First operand 4613 states and 6685 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 04:08:12,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:08:14,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:08:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:08:20,371 INFO L93 Difference]: Finished difference Result 14993 states and 22029 transitions. [2021-12-16 04:08:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 04:08:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2021-12-16 04:08:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:08:20,427 INFO L225 Difference]: With dead ends: 14993 [2021-12-16 04:08:20,428 INFO L226 Difference]: Without dead ends: 10395 [2021-12-16 04:08:20,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 04:08:20,454 INFO L933 BasicCegarLoop]: 2052 mSDtfsCounter, 2217 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 841 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 4202 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-16 04:08:20,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2489 Valid, 4202 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1309 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-12-16 04:08:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-12-16 04:08:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 8963. [2021-12-16 04:08:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 6186 states have (on average 1.3632395732298739) internal successors, (8433), 6394 states have internal predecessors, (8433), 2294 states have call successors, (2294), 487 states have call predecessors, (2294), 482 states have return successors, (2276), 2249 states have call predecessors, (2276), 2276 states have call successors, (2276) [2021-12-16 04:08:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 13003 transitions. [2021-12-16 04:08:20,777 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 13003 transitions. Word has length 59 [2021-12-16 04:08:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:08:20,778 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 13003 transitions. [2021-12-16 04:08:20,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 04:08:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 13003 transitions. [2021-12-16 04:08:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 04:08:20,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:08:20,782 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:08:20,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 04:08:20,782 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:08:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:08:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash 661729035, now seen corresponding path program 1 times [2021-12-16 04:08:20,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:08:20,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720624533] [2021-12-16 04:08:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:08:20,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:08:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:08:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 04:08:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 04:08:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 04:08:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 04:08:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 04:08:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 04:08:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 04:08:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:08:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 04:08:21,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:08:21,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720624533] [2021-12-16 04:08:21,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720624533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:08:21,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:08:21,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 04:08:21,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841932535] [2021-12-16 04:08:21,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:08:21,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 04:08:21,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:08:21,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 04:08:21,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 04:08:21,082 INFO L87 Difference]: Start difference. First operand 8963 states and 13003 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 04:08:23,107 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 [] [2021-12-16 04:08:25,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:08:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:08:33,938 INFO L93 Difference]: Finished difference Result 32602 states and 48606 transitions. [2021-12-16 04:08:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 04:08:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2021-12-16 04:08:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:08:34,088 INFO L225 Difference]: With dead ends: 32602 [2021-12-16 04:08:34,088 INFO L226 Difference]: Without dead ends: 23651 [2021-12-16 04:08:34,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 04:08:34,136 INFO L933 BasicCegarLoop]: 1920 mSDtfsCounter, 3197 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 1157 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3514 SdHoareTripleChecker+Valid, 4820 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-16 04:08:34,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3514 Valid, 4820 Invalid, 3300 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1157 Valid, 2141 Invalid, 2 Unknown, 0 Unchecked, 12.2s Time] [2021-12-16 04:08:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23651 states. [2021-12-16 04:08:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23651 to 17850. [2021-12-16 04:08:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 12333 states have (on average 1.3637395605286629) internal successors, (16819), 12737 states have internal predecessors, (16819), 4558 states have call successors, (4558), 966 states have call predecessors, (4558), 958 states have return successors, (4538), 4482 states have call predecessors, (4538), 4538 states have call successors, (4538) [2021-12-16 04:08:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 25915 transitions. [2021-12-16 04:08:34,861 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 25915 transitions. Word has length 75 [2021-12-16 04:08:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:08:34,863 INFO L470 AbstractCegarLoop]: Abstraction has 17850 states and 25915 transitions. [2021-12-16 04:08:34,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 04:08:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 25915 transitions. [2021-12-16 04:08:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 04:08:34,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:08:34,873 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:08:34,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 04:08:34,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:08:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:08:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash -178671597, now seen corresponding path program 1 times [2021-12-16 04:08:34,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:08:34,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359333761] [2021-12-16 04:08:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:08:34,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:08:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:08:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 04:08:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 04:08:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 04:08:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 04:08:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 04:08:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 04:08:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 04:08:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:08:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:08:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 04:08:35,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:08:35,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359333761] [2021-12-16 04:08:35,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359333761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:08:35,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:08:35,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 04:08:35,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362467606] [2021-12-16 04:08:35,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:08:35,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 04:08:35,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:08:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 04:08:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-16 04:08:35,900 INFO L87 Difference]: Start difference. First operand 17850 states and 25915 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 04:08:37,924 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 []