./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.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 4d5b4b32fa0da80203e2a18166964cfde265e42cc1a9ca2751016d17ee22d414 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 04:06:02,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 04:06:02,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 04:06:02,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 04:06:02,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 04:06:02,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 04:06:02,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 04:06:02,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 04:06:02,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 04:06:02,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 04:06:02,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 04:06:02,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 04:06:02,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 04:06:02,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 04:06:02,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 04:06:02,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 04:06:02,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 04:06:02,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 04:06:02,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 04:06:02,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 04:06:02,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 04:06:02,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 04:06:02,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 04:06:02,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 04:06:02,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 04:06:02,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 04:06:02,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 04:06:02,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 04:06:02,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 04:06:02,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 04:06:02,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 04:06:02,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 04:06:02,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 04:06:02,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 04:06:02,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 04:06:02,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 04:06:02,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 04:06:02,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 04:06:02,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 04:06:02,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 04:06:02,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 04:06:02,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 04:06:02,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 04:06:02,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 04:06:02,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 04:06:02,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 04:06:02,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 04:06:02,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 04:06:02,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 04:06:02,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 04:06:02,862 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 04:06:02,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 04:06:02,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 04:06:02,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 04:06:02,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 04:06:02,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 04:06:02,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 04:06:02,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 04:06:02,863 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 04:06:02,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 04:06:02,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 04:06:02,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 04:06:02,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 04:06:02,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:06:02,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 04:06:02,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 04:06:02,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 04:06:02,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 04:06:02,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 04:06:02,866 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 04:06:02,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 04:06:02,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 04:06:02,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5b4b32fa0da80203e2a18166964cfde265e42cc1a9ca2751016d17ee22d414 [2021-12-28 04:06:03,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 04:06:03,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 04:06:03,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 04:06:03,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 04:06:03,232 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 04:06:03,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-12-28 04:06:03,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791e4eefb/3781811e265049a68046d07b19b95d09/FLAGd493c37a1 [2021-12-28 04:06:03,916 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 04:06:03,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-12-28 04:06:03,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791e4eefb/3781811e265049a68046d07b19b95d09/FLAGd493c37a1 [2021-12-28 04:06:04,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791e4eefb/3781811e265049a68046d07b19b95d09 [2021-12-28 04:06:04,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 04:06:04,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 04:06:04,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 04:06:04,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 04:06:04,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 04:06:04,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:06:04" (1/1) ... [2021-12-28 04:06:04,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205ad002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:04, skipping insertion in model container [2021-12-28 04:06:04,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:06:04" (1/1) ... [2021-12-28 04:06:04,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 04:06:04,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 04:06:04,981 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-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i[110947,110960] [2021-12-28 04:06:05,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:06:05,414 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 04:06:05,555 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-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i[110947,110960] [2021-12-28 04:06:05,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:06:05,834 INFO L208 MainTranslator]: Completed translation [2021-12-28 04:06:05,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05 WrapperNode [2021-12-28 04:06:05,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 04:06:05,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 04:06:05,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 04:06:05,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 04:06:05,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:05,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,122 INFO L137 Inliner]: procedures = 204, calls = 2153, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 4781 [2021-12-28 04:06:06,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 04:06:06,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 04:06:06,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 04:06:06,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 04:06:06,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 04:06:06,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 04:06:06,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 04:06:06,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 04:06:06,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (1/1) ... [2021-12-28 04:06:06,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:06:06,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 04:06:06,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 04:06:06,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 04:06:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-12-28 04:06:06,473 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-12-28 04:06:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_in_callback [2021-12-28 04:06:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_in_callback [2021-12-28 04:06:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-28 04:06:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-28 04:06:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-12-28 04:06:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 04:06:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 04:06:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 04:06:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 04:06:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2021-12-28 04:06:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2021-12-28 04:06:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure ti_throttle [2021-12-28 04:06:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_throttle [2021-12-28 04:06:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-28 04:06:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-28 04:06:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 04:06:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 04:06:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_out_callback [2021-12-28 04:06:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_out_callback [2021-12-28 04:06:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-12-28 04:06:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-12-28 04:06:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-12-28 04:06:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-12-28 04:06:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_mcr [2021-12-28 04:06:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_mcr [2021-12-28 04:06:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 04:06:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 04:06:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 04:06:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 04:06:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure ti_startup [2021-12-28 04:06:06,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_startup [2021-12-28 04:06:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 04:06:06,478 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 04:06:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure ti_ioctl [2021-12-28 04:06:06,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_ioctl [2021-12-28 04:06:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 04:06:06,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 04:06:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_2 [2021-12-28 04:06:06,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_2 [2021-12-28 04:06:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-12-28 04:06:06,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-12-28 04:06:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmget [2021-12-28 04:06:06,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmget [2021-12-28 04:06:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-12-28 04:06:06,480 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-12-28 04:06:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_free [2021-12-28 04:06:06,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_free [2021-12-28 04:06:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-12-28 04:06:06,481 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-12-28 04:06:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-28 04:06:06,481 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-28 04:06:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 04:06:06,482 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-12-28 04:06:06,482 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-12-28 04:06:06,482 INFO L130 BoogieDeclarations]: Found specification of procedure ti_break [2021-12-28 04:06:06,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_break [2021-12-28 04:06:06,483 INFO L130 BoogieDeclarations]: Found specification of procedure __swab16s [2021-12-28 04:06:06,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __swab16s [2021-12-28 04:06:06,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 04:06:06,484 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-28 04:06:06,484 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-28 04:06:06,484 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-28 04:06:06,484 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-28 04:06:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 04:06:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write [2021-12-28 04:06:06,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write [2021-12-28 04:06:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 04:06:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure ti_restart_read [2021-12-28 04:06:06,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_restart_read [2021-12-28 04:06:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-28 04:06:06,486 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-28 04:06:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 04:06:06,486 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 04:06:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure ti_release [2021-12-28 04:06:06,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_release [2021-12-28 04:06:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-12-28 04:06:06,487 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-12-28 04:06:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-28 04:06:06,487 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-28 04:06:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_s_reg [2021-12-28 04:06:06,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_s_reg [2021-12-28 04:06:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-28 04:06:06,488 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-28 04:06:06,488 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-12-28 04:06:06,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-12-28 04:06:06,488 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-28 04:06:06,488 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-28 04:06:06,488 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-28 04:06:06,488 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-28 04:06:06,489 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2021-12-28 04:06:06,489 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2021-12-28 04:06:06,489 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-28 04:06:06,489 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-28 04:06:06,490 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-12-28 04:06:06,490 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-12-28 04:06:06,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 04:06:06,490 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 04:06:06,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 04:06:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 04:06:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 04:06:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 04:06:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 04:06:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_port_data [2021-12-28 04:06:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_port_data [2021-12-28 04:06:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure ti_command_out_sync [2021-12-28 04:06:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_command_out_sync [2021-12-28 04:06:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-28 04:06:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-28 04:06:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-28 04:06:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-28 04:06:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure ti_open [2021-12-28 04:06:06,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_open [2021-12-28 04:06:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmset [2021-12-28 04:06:06,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmset [2021-12-28 04:06:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 04:06:06,494 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 04:06:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 04:06:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-12-28 04:06:06,497 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-12-28 04:06:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_s_der [2021-12-28 04:06:06,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_s_der [2021-12-28 04:06:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_byte [2021-12-28 04:06:06,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_byte [2021-12-28 04:06:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure ti_chars_in_buffer [2021-12-28 04:06:06,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_chars_in_buffer [2021-12-28 04:06:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 04:06:06,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 04:06:06,504 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-12-28 04:06:06,505 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-12-28 04:06:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2021-12-28 04:06:06,505 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2021-12-28 04:06:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_room [2021-12-28 04:06:06,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_room [2021-12-28 04:06:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 04:06:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-28 04:06:06,505 INFO L130 BoogieDeclarations]: Found specification of procedure ti_interrupt_callback [2021-12-28 04:06:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_interrupt_callback [2021-12-28 04:06:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 04:06:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-12-28 04:06:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-12-28 04:06:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 04:06:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-28 04:06:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure ti_close [2021-12-28 04:06:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_close [2021-12-28 04:06:06,506 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-12-28 04:06:06,507 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-12-28 04:06:06,507 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-28 04:06:06,507 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-28 04:06:06,507 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-28 04:06:06,507 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-28 04:06:06,507 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-28 04:06:06,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-28 04:06:06,507 INFO L130 BoogieDeclarations]: Found specification of procedure ti_unthrottle [2021-12-28 04:06:06,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_unthrottle [2021-12-28 04:06:06,508 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2021-12-28 04:06:06,508 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2021-12-28 04:06:06,508 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-28 04:06:06,508 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-28 04:06:06,508 INFO L130 BoogieDeclarations]: Found specification of procedure ti_send [2021-12-28 04:06:06,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_send [2021-12-28 04:06:06,508 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-28 04:06:06,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-28 04:06:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure ti_drain [2021-12-28 04:06:06,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_drain [2021-12-28 04:06:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 04:06:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_termios [2021-12-28 04:06:06,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_termios [2021-12-28 04:06:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2021-12-28 04:06:06,509 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2021-12-28 04:06:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 04:06:06,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 04:06:07,284 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 04:06:07,288 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 04:06:07,611 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 04:06:35,827 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 04:06:35,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 04:06:35,853 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 04:06:35,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:06:35 BoogieIcfgContainer [2021-12-28 04:06:35,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 04:06:35,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 04:06:35,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 04:06:35,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 04:06:35,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 04:06:04" (1/3) ... [2021-12-28 04:06:35,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42faf2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:06:35, skipping insertion in model container [2021-12-28 04:06:35,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:06:05" (2/3) ... [2021-12-28 04:06:35,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42faf2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:06:35, skipping insertion in model container [2021-12-28 04:06:35,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:06:35" (3/3) ... [2021-12-28 04:06:35,864 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-12-28 04:06:35,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 04:06:35,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 04:06:35,967 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 04:06:35,972 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 04:06:35,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 04:06:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 1579 states, 1153 states have (on average 1.4388551604509974) internal successors, (1659), 1182 states have internal predecessors, (1659), 348 states have call successors, (348), 77 states have call predecessors, (348), 76 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) [2021-12-28 04:06:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 04:06:36,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:06:36,033 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 04:06:36,034 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:06:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:06:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash 149749609, now seen corresponding path program 1 times [2021-12-28 04:06:36,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:06:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005279368] [2021-12-28 04:06:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:06:36,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:36,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:36,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:36,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 04:06:36,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:06:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005279368] [2021-12-28 04:06:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005279368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:06:36,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:06:36,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 04:06:36,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987599538] [2021-12-28 04:06:36,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:06:36,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 04:06:36,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:06:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 04:06:36,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 04:06:36,858 INFO L87 Difference]: Start difference. First operand has 1579 states, 1153 states have (on average 1.4388551604509974) internal successors, (1659), 1182 states have internal predecessors, (1659), 348 states have call successors, (348), 77 states have call predecessors, (348), 76 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 04:06:38,943 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 [] [2021-12-28 04:06:40,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:06:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:06:47,015 INFO L93 Difference]: Finished difference Result 5019 states and 8047 transitions. [2021-12-28 04:06:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 04:06:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-12-28 04:06:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:06:47,057 INFO L225 Difference]: With dead ends: 5019 [2021-12-28 04:06:47,058 INFO L226 Difference]: Without dead ends: 3427 [2021-12-28 04:06:47,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:06:47,084 INFO L933 BasicCegarLoop]: 2630 mSDtfsCounter, 3097 mSDsluCounter, 3289 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 953 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3370 SdHoareTripleChecker+Valid, 5919 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-28 04:06:47,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3370 Valid, 5919 Invalid, 2570 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [953 Valid, 1615 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2021-12-28 04:06:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-12-28 04:06:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 2905. [2021-12-28 04:06:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 2118 states have (on average 1.4291784702549575) internal successors, (3027), 2156 states have internal predecessors, (3027), 643 states have call successors, (643), 144 states have call predecessors, (643), 143 states have return successors, (638), 634 states have call predecessors, (638), 638 states have call successors, (638) [2021-12-28 04:06:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 4308 transitions. [2021-12-28 04:06:47,334 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 4308 transitions. Word has length 43 [2021-12-28 04:06:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:06:47,338 INFO L470 AbstractCegarLoop]: Abstraction has 2905 states and 4308 transitions. [2021-12-28 04:06:47,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 04:06:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 4308 transitions. [2021-12-28 04:06:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 04:06:47,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:06:47,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 04:06:47,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 04:06:47,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:06:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:06:47,359 INFO L85 PathProgramCache]: Analyzing trace with hash 523415031, now seen corresponding path program 1 times [2021-12-28 04:06:47,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:06:47,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209648455] [2021-12-28 04:06:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:06:47,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 04:06:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 04:06:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 04:06:47,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:06:47,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209648455] [2021-12-28 04:06:47,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209648455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:06:47,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:06:47,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:06:47,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252100304] [2021-12-28 04:06:47,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:06:47,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:06:47,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:06:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:06:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:06:47,831 INFO L87 Difference]: Start difference. First operand 2905 states and 4308 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 04:06:49,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:06:51,910 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 [] [2021-12-28 04:07:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:07:03,650 INFO L93 Difference]: Finished difference Result 6810 states and 10600 transitions. [2021-12-28 04:07:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 04:07:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 4 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 66 [2021-12-28 04:07:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:07:03,706 INFO L225 Difference]: With dead ends: 6810 [2021-12-28 04:07:03,707 INFO L226 Difference]: Without dead ends: 6797 [2021-12-28 04:07:03,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 04:07:03,718 INFO L933 BasicCegarLoop]: 2410 mSDtfsCounter, 4943 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 4608 mSolverCounterSat, 2465 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5271 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 7075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2465 IncrementalHoareTripleChecker+Valid, 4608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2021-12-28 04:07:03,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5271 Valid, 4066 Invalid, 7075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2465 Valid, 4608 Invalid, 2 Unknown, 0 Unchecked, 15.3s Time] [2021-12-28 04:07:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6797 states. [2021-12-28 04:07:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6797 to 5755. [2021-12-28 04:07:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 4201 states have (on average 1.4310878362294692) internal successors, (6012), 4274 states have internal predecessors, (6012), 1271 states have call successors, (1271), 285 states have call predecessors, (1271), 282 states have return successors, (1266), 1255 states have call predecessors, (1266), 1266 states have call successors, (1266) [2021-12-28 04:07:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8549 transitions. [2021-12-28 04:07:03,974 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8549 transitions. Word has length 66 [2021-12-28 04:07:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:07:03,975 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 8549 transitions. [2021-12-28 04:07:03,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 04:07:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8549 transitions. [2021-12-28 04:07:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 04:07:03,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:07:03,982 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 04:07:03,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 04:07:03,982 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:07:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:07:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -954625062, now seen corresponding path program 1 times [2021-12-28 04:07:03,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:07:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411703573] [2021-12-28 04:07:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:07:03,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:07:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:07:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:07:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:07:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:07:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:07:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 04:07:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 04:07:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:07:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 04:07:04,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:07:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411703573] [2021-12-28 04:07:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411703573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:07:04,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:07:04,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 04:07:04,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626200721] [2021-12-28 04:07:04,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:07:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 04:07:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:07:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 04:07:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:07:04,434 INFO L87 Difference]: Start difference. First operand 5755 states and 8549 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)