./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.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 4e0b4bb78430cd3ff87fa852dcd49e649016647ef60f492a14a048040c1b0a8a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:10:53,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:10:53,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:10:53,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:10:53,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:10:53,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:10:53,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:10:53,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:10:53,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:10:53,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:10:53,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:10:53,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:10:53,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:10:53,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:10:53,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:10:53,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:10:53,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:10:53,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:10:53,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:10:53,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:10:53,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:10:53,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:10:53,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:10:53,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:10:53,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:10:53,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:10:53,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:10:53,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:10:53,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:10:53,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:10:53,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:10:53,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:10:53,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:10:53,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:10:53,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:10:53,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:10:53,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:10:53,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:10:53,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:10:53,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:10:53,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:10:53,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:10:53,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:10:53,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:10:53,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:10:53,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:10:53,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:10:53,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:10:53,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:10:53,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:10:53,795 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:10:53,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:10:53,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:10:53,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:10:53,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:10:53,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:10:53,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:10:53,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:10:53,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:10:53,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:10:53,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:10:53,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:10:53,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:10:53,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:10:53,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:10:53,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:10:53,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:10:53,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:10:53,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:10:53,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:10:53,799 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:10:53,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:10:53,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:10:53,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e0b4bb78430cd3ff87fa852dcd49e649016647ef60f492a14a048040c1b0a8a [2021-12-21 16:10:54,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:10:54,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:10:54,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:10:54,073 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:10:54,074 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:10:54,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.ko-entry_point.cil.out.i [2021-12-21 16:10:54,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e098092e/fbc4920ed1cd4a4d9fb0826ba71951c7/FLAG9deb1b6d7 [2021-12-21 16:10:54,889 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:10:54,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.ko-entry_point.cil.out.i [2021-12-21 16:10:54,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e098092e/fbc4920ed1cd4a4d9fb0826ba71951c7/FLAG9deb1b6d7 [2021-12-21 16:10:55,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e098092e/fbc4920ed1cd4a4d9fb0826ba71951c7 [2021-12-21 16:10:55,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:10:55,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:10:55,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:10:55,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:10:55,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:10:55,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:10:55" (1/1) ... [2021-12-21 16:10:55,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636f2bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:55, skipping insertion in model container [2021-12-21 16:10:55,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:10:55" (1/1) ... [2021-12-21 16:10:55,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:10:55,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:10:55,888 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-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.ko-entry_point.cil.out.i[152066,152079] [2021-12-21 16:10:56,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:10:56,502 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:10:56,619 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-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.ko-entry_point.cil.out.i[152066,152079] [2021-12-21 16:10:56,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:10:56,975 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:10:56,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56 WrapperNode [2021-12-21 16:10:56,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:10:56,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:10:56,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:10:56,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:10:56,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,134 INFO L137 Inliner]: procedures = 141, calls = 724, calls flagged for inlining = 69, calls inlined = 55, statements flattened = 1676 [2021-12-21 16:10:57,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:10:57,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:10:57,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:10:57,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:10:57,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:10:57,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:10:57,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:10:57,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:10:57,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (1/1) ... [2021-12-21 16:10:57,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:10:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:57,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 16:10:57,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 16:10:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:10:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:10:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:10:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure sja1000_write_cmdreg [2021-12-21 16:10:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure sja1000_write_cmdreg [2021-12-21 16:10:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-12-21 16:10:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-12-21 16:10:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-21 16:10:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-21 16:10:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u8~0~TO~VOID [2021-12-21 16:10:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u8~0~TO~VOID [2021-12-21 16:10:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:10:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:10:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:10:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure set_reset_mode [2021-12-21 16:10:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure set_reset_mode [2021-12-21 16:10:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:10:57,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:10:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:10:57,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:10:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~~u8~0 [2021-12-21 16:10:57,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~~u8~0 [2021-12-21 16:10:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:10:57,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:10:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure sja1000_is_absent [2021-12-21 16:10:57,336 INFO L138 BoogieDeclarations]: Found implementation of procedure sja1000_is_absent [2021-12-21 16:10:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-21 16:10:57,337 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-21 16:10:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:10:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-21 16:10:57,337 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-21 16:10:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-12-21 16:10:57,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-12-21 16:10:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:10:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-21 16:10:57,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-21 16:10:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:10:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:10:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-12-21 16:10:57,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-12-21 16:10:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:10:57,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:10:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:10:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-21 16:10:57,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-21 16:10:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2021-12-21 16:10:57,340 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2021-12-21 16:10:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:10:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:10:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-21 16:10:57,341 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-21 16:10:57,341 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-21 16:10:57,341 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-21 16:10:57,341 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2021-12-21 16:10:57,342 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2021-12-21 16:10:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:10:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure sja1000_start [2021-12-21 16:10:57,343 INFO L138 BoogieDeclarations]: Found implementation of procedure sja1000_start [2021-12-21 16:10:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:10:57,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:10:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:10:57,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:10:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure can_change_mtu [2021-12-21 16:10:57,345 INFO L138 BoogieDeclarations]: Found implementation of procedure can_change_mtu [2021-12-21 16:10:57,717 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:10:57,719 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:10:58,450 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:10:58,955 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:10:58,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:10:58,966 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 16:10:58,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:10:58 BoogieIcfgContainer [2021-12-21 16:10:58,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:10:58,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:10:58,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:10:58,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:10:58,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:10:55" (1/3) ... [2021-12-21 16:10:58,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45533877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:10:58, skipping insertion in model container [2021-12-21 16:10:58,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:56" (2/3) ... [2021-12-21 16:10:58,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45533877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:10:58, skipping insertion in model container [2021-12-21 16:10:58,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:10:58" (3/3) ... [2021-12-21 16:10:58,976 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--sja1000--sja1000.ko-entry_point.cil.out.i [2021-12-21 16:10:58,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:10:58,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:10:59,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:10:59,027 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 16:10:59,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:10:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 511 states, 371 states have (on average 1.3557951482479784) internal successors, (503), 382 states have internal predecessors, (503), 113 states have call successors, (113), 26 states have call predecessors, (113), 25 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-12-21 16:10:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 16:10:59,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:59,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:59,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash 191472402, now seen corresponding path program 1 times [2021-12-21 16:10:59,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339375649] [2021-12-21 16:10:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:59,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:59,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:59,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339375649] [2021-12-21 16:10:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339375649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:59,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:59,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:10:59,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174452745] [2021-12-21 16:10:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:59,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:10:59,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:10:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:10:59,507 INFO L87 Difference]: Start difference. First operand has 511 states, 371 states have (on average 1.3557951482479784) internal successors, (503), 382 states have internal predecessors, (503), 113 states have call successors, (113), 26 states have call predecessors, (113), 25 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:11:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:01,060 INFO L93 Difference]: Finished difference Result 1593 states and 2306 transitions. [2021-12-21 16:11:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:11:01,063 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-21 16:11:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:01,081 INFO L225 Difference]: With dead ends: 1593 [2021-12-21 16:11:01,081 INFO L226 Difference]: Without dead ends: 1069 [2021-12-21 16:11:01,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:01,092 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 859 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:01,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1637 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 16:11:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-12-21 16:11:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 973. [2021-12-21 16:11:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 713 states have (on average 1.329593267882188) internal successors, (948), 721 states have internal predecessors, (948), 212 states have call successors, (212), 48 states have call predecessors, (212), 47 states have return successors, (211), 209 states have call predecessors, (211), 211 states have call successors, (211) [2021-12-21 16:11:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1371 transitions. [2021-12-21 16:11:01,225 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1371 transitions. Word has length 22 [2021-12-21 16:11:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:01,232 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1371 transitions. [2021-12-21 16:11:01,232 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:11:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1371 transitions. [2021-12-21 16:11:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 16:11:01,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:01,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:01,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:11:01,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 824111555, now seen corresponding path program 1 times [2021-12-21 16:11:01,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:01,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133509983] [2021-12-21 16:11:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:01,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:01,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:11:01,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133509983] [2021-12-21 16:11:01,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133509983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:01,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:01,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:01,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617334960] [2021-12-21 16:11:01,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:01,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:01,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:01,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:01,414 INFO L87 Difference]: Start difference. First operand 973 states and 1371 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:11:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:02,523 INFO L93 Difference]: Finished difference Result 2035 states and 2876 transitions. [2021-12-21 16:11:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:11:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-21 16:11:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:02,536 INFO L225 Difference]: With dead ends: 2035 [2021-12-21 16:11:02,536 INFO L226 Difference]: Without dead ends: 1068 [2021-12-21 16:11:02,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:11:02,547 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 937 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:02,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 1896 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:11:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-12-21 16:11:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 972. [2021-12-21 16:11:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 712 states have (on average 1.3258426966292134) internal successors, (944), 720 states have internal predecessors, (944), 212 states have call successors, (212), 48 states have call predecessors, (212), 47 states have return successors, (211), 209 states have call predecessors, (211), 211 states have call successors, (211) [2021-12-21 16:11:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1367 transitions. [2021-12-21 16:11:02,634 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1367 transitions. Word has length 25 [2021-12-21 16:11:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:02,634 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1367 transitions. [2021-12-21 16:11:02,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:11:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1367 transitions. [2021-12-21 16:11:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 16:11:02,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:02,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:02,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:11:02,642 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 395295294, now seen corresponding path program 1 times [2021-12-21 16:11:02,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:02,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534459124] [2021-12-21 16:11:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:02,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:02,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:02,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 16:11:02,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534459124] [2021-12-21 16:11:02,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534459124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:02,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:11:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751406907] [2021-12-21 16:11:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:02,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:11:02,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:11:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:11:02,805 INFO L87 Difference]: Start difference. First operand 972 states and 1367 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 16:11:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:04,323 INFO L93 Difference]: Finished difference Result 2116 states and 3022 transitions. [2021-12-21 16:11:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-21 16:11:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:04,338 INFO L225 Difference]: With dead ends: 2116 [2021-12-21 16:11:04,338 INFO L226 Difference]: Without dead ends: 2109 [2021-12-21 16:11:04,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:04,342 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 837 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:04,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 3072 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 16:11:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-12-21 16:11:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1927. [2021-12-21 16:11:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1408 states have (on average 1.3274147727272727) internal successors, (1869), 1426 states have internal predecessors, (1869), 422 states have call successors, (422), 95 states have call predecessors, (422), 96 states have return successors, (447), 417 states have call predecessors, (447), 421 states have call successors, (447) [2021-12-21 16:11:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2738 transitions. [2021-12-21 16:11:04,457 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2738 transitions. Word has length 39 [2021-12-21 16:11:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:04,458 INFO L470 AbstractCegarLoop]: Abstraction has 1927 states and 2738 transitions. [2021-12-21 16:11:04,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 16:11:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2738 transitions. [2021-12-21 16:11:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 16:11:04,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:04,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:04,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:11:04,466 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash 865162911, now seen corresponding path program 1 times [2021-12-21 16:11:04,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:04,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860261573] [2021-12-21 16:11:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:04,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:04,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:04,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:11:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:04,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 16:11:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:04,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:11:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 16:11:04,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:04,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860261573] [2021-12-21 16:11:04,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860261573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:04,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:04,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:04,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452317124] [2021-12-21 16:11:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:04,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:04,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:04,654 INFO L87 Difference]: Start difference. First operand 1927 states and 2738 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:11:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:06,733 INFO L93 Difference]: Finished difference Result 4756 states and 6804 transitions. [2021-12-21 16:11:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:11:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 75 [2021-12-21 16:11:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:06,752 INFO L225 Difference]: With dead ends: 4756 [2021-12-21 16:11:06,752 INFO L226 Difference]: Without dead ends: 2835 [2021-12-21 16:11:06,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:06,763 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 1014 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:06,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1739 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 16:11:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-12-21 16:11:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2337. [2021-12-21 16:11:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 1727 states have (on average 1.3184713375796178) internal successors, (2277), 1749 states have internal predecessors, (2277), 472 states have call successors, (472), 122 states have call predecessors, (472), 137 states have return successors, (532), 479 states have call predecessors, (532), 471 states have call successors, (532) [2021-12-21 16:11:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3281 transitions. [2021-12-21 16:11:06,883 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3281 transitions. Word has length 75 [2021-12-21 16:11:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:06,884 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 3281 transitions. [2021-12-21 16:11:06,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:11:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3281 transitions. [2021-12-21 16:11:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 16:11:06,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:06,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:11:06,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:06,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1950464579, now seen corresponding path program 2 times [2021-12-21 16:11:06,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:06,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065436471] [2021-12-21 16:11:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:06,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:07,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:07,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:07,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 16:11:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:07,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:11:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:07,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 16:11:07,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:07,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065436471] [2021-12-21 16:11:07,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065436471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:07,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:07,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:07,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288013407] [2021-12-21 16:11:07,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:07,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:07,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:07,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:07,052 INFO L87 Difference]: Start difference. First operand 2337 states and 3281 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 16:11:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:09,398 INFO L93 Difference]: Finished difference Result 5332 states and 7628 transitions. [2021-12-21 16:11:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:11:09,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 75 [2021-12-21 16:11:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:09,425 INFO L225 Difference]: With dead ends: 5332 [2021-12-21 16:11:09,425 INFO L226 Difference]: Without dead ends: 3649 [2021-12-21 16:11:09,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:09,439 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 772 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:09,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2365 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 16:11:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2021-12-21 16:11:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 3008. [2021-12-21 16:11:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 2234 states have (on average 1.3196060877350044) internal successors, (2948), 2262 states have internal predecessors, (2948), 595 states have call successors, (595), 158 states have call predecessors, (595), 178 states have return successors, (673), 605 states have call predecessors, (673), 594 states have call successors, (673) [2021-12-21 16:11:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4216 transitions. [2021-12-21 16:11:09,587 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4216 transitions. Word has length 75 [2021-12-21 16:11:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:09,588 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4216 transitions. [2021-12-21 16:11:09,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 16:11:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4216 transitions. [2021-12-21 16:11:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 16:11:09,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:09,599 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:09,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:11:09,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1867198755, now seen corresponding path program 1 times [2021-12-21 16:11:09,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:09,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548025067] [2021-12-21 16:11:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:09,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:09,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:09,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:09,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:11:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 16:11:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 16:11:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548025067] [2021-12-21 16:11:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548025067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:09,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:09,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:09,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470584779] [2021-12-21 16:11:09,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:09,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:09,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:09,795 INFO L87 Difference]: Start difference. First operand 3008 states and 4216 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:11:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:12,057 INFO L93 Difference]: Finished difference Result 6829 states and 9736 transitions. [2021-12-21 16:11:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:11:12,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 88 [2021-12-21 16:11:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:12,083 INFO L225 Difference]: With dead ends: 6829 [2021-12-21 16:11:12,083 INFO L226 Difference]: Without dead ends: 4475 [2021-12-21 16:11:12,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:12,098 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 882 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 2337 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:12,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 2337 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 16:11:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-12-21 16:11:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3691. [2021-12-21 16:11:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3691 states, 2749 states have (on average 1.3193888686795199) internal successors, (3627), 2783 states have internal predecessors, (3627), 718 states have call successors, (718), 198 states have call predecessors, (718), 223 states have return successors, (814), 731 states have call predecessors, (814), 717 states have call successors, (814) [2021-12-21 16:11:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 5159 transitions. [2021-12-21 16:11:12,295 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 5159 transitions. Word has length 88 [2021-12-21 16:11:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:12,297 INFO L470 AbstractCegarLoop]: Abstraction has 3691 states and 5159 transitions. [2021-12-21 16:11:12,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:11:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 5159 transitions. [2021-12-21 16:11:12,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-21 16:11:12,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:12,312 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:12,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:11:12,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -845511377, now seen corresponding path program 1 times [2021-12-21 16:11:12,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:12,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614366517] [2021-12-21 16:11:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:12,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 16:11:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 16:11:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:11:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 16:11:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 16:11:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 16:11:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:11:12,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:12,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614366517] [2021-12-21 16:11:12,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614366517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:12,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:12,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:11:12,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085918943] [2021-12-21 16:11:12,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:12,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:11:12,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:11:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:11:12,526 INFO L87 Difference]: Start difference. First operand 3691 states and 5159 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 16:11:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:14,264 INFO L93 Difference]: Finished difference Result 8242 states and 11825 transitions. [2021-12-21 16:11:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 127 [2021-12-21 16:11:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:14,289 INFO L225 Difference]: With dead ends: 8242 [2021-12-21 16:11:14,289 INFO L226 Difference]: Without dead ends: 4564 [2021-12-21 16:11:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:14,319 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 364 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:14,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 2103 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 16:11:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-12-21 16:11:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3701. [2021-12-21 16:11:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3701 states, 2759 states have (on average 1.3182312432040595) internal successors, (3637), 2793 states have internal predecessors, (3637), 718 states have call successors, (718), 198 states have call predecessors, (718), 223 states have return successors, (814), 731 states have call predecessors, (814), 717 states have call successors, (814) [2021-12-21 16:11:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3701 states to 3701 states and 5169 transitions. [2021-12-21 16:11:14,505 INFO L78 Accepts]: Start accepts. Automaton has 3701 states and 5169 transitions. Word has length 127 [2021-12-21 16:11:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:14,506 INFO L470 AbstractCegarLoop]: Abstraction has 3701 states and 5169 transitions. [2021-12-21 16:11:14,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 16:11:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3701 states and 5169 transitions. [2021-12-21 16:11:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 16:11:14,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:14,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:14,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:11:14,518 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash -310397959, now seen corresponding path program 1 times [2021-12-21 16:11:14,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755825892] [2021-12-21 16:11:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:14,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:11:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 16:11:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 16:11:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:11:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:11:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:11:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:11:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:11:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 16:11:14,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755825892] [2021-12-21 16:11:14,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755825892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:14,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:14,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:11:14,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098871163] [2021-12-21 16:11:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:14,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:11:14,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:11:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:11:14,821 INFO L87 Difference]: Start difference. First operand 3701 states and 5169 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:11:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:17,592 INFO L93 Difference]: Finished difference Result 11564 states and 16600 transitions. [2021-12-21 16:11:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 16:11:17,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 130 [2021-12-21 16:11:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:17,638 INFO L225 Difference]: With dead ends: 11564 [2021-12-21 16:11:17,638 INFO L226 Difference]: Without dead ends: 8163 [2021-12-21 16:11:17,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:11:17,666 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1109 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:17,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 2774 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 16:11:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-12-21 16:11:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 6755. [2021-12-21 16:11:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 5040 states have (on average 1.3178571428571428) internal successors, (6642), 5102 states have internal predecessors, (6642), 1310 states have call successors, (1310), 358 states have call predecessors, (1310), 404 states have return successors, (1485), 1334 states have call predecessors, (1485), 1309 states have call successors, (1485) [2021-12-21 16:11:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 9437 transitions. [2021-12-21 16:11:18,060 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 9437 transitions. Word has length 130 [2021-12-21 16:11:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:18,061 INFO L470 AbstractCegarLoop]: Abstraction has 6755 states and 9437 transitions. [2021-12-21 16:11:18,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:11:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 9437 transitions. [2021-12-21 16:11:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-21 16:11:18,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:18,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:18,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:11:18,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1373348168, now seen corresponding path program 1 times [2021-12-21 16:11:18,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:18,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150222358] [2021-12-21 16:11:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:18,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:11:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 16:11:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 16:11:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:11:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:11:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:11:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:11:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:11:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 16:11:18,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150222358] [2021-12-21 16:11:18,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150222358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:18,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:18,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 16:11:18,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489889015] [2021-12-21 16:11:18,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:18,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:11:18,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:11:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:18,375 INFO L87 Difference]: Start difference. First operand 6755 states and 9437 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:11:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:22,558 INFO L93 Difference]: Finished difference Result 32587 states and 48611 transitions. [2021-12-21 16:11:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 16:11:22,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 133 [2021-12-21 16:11:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:22,710 INFO L225 Difference]: With dead ends: 32587 [2021-12-21 16:11:22,710 INFO L226 Difference]: Without dead ends: 25845 [2021-12-21 16:11:22,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:11:22,753 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 2035 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2218 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:22,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2218 Valid, 4283 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-21 16:11:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25845 states. [2021-12-21 16:11:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25845 to 12913. [2021-12-21 16:11:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 9652 states have (on average 1.3159966846249482) internal successors, (12702), 9770 states have internal predecessors, (12702), 2494 states have call successors, (2494), 678 states have call predecessors, (2494), 766 states have return successors, (2827), 2540 states have call predecessors, (2827), 2493 states have call successors, (2827) [2021-12-21 16:11:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 18023 transitions. [2021-12-21 16:11:23,685 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 18023 transitions. Word has length 133 [2021-12-21 16:11:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:23,685 INFO L470 AbstractCegarLoop]: Abstraction has 12913 states and 18023 transitions. [2021-12-21 16:11:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 5 states have internal predecessors, (100), 3 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:11:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 18023 transitions. [2021-12-21 16:11:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 16:11:23,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:23,699 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:23,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:11:23,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 74024474, now seen corresponding path program 1 times [2021-12-21 16:11:23,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639672659] [2021-12-21 16:11:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:23,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:11:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 16:11:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 16:11:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:11:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 16:11:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 16:11:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:11:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:23,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 16:11:24,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639672659] [2021-12-21 16:11:24,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639672659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:24,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:24,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 16:11:24,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259669469] [2021-12-21 16:11:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:24,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 16:11:24,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 16:11:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:11:24,034 INFO L87 Difference]: Start difference. First operand 12913 states and 18023 transitions. Second operand has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:11:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:26,166 INFO L93 Difference]: Finished difference Result 20477 states and 29022 transitions. [2021-12-21 16:11:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 130 [2021-12-21 16:11:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:26,170 INFO L225 Difference]: With dead ends: 20477 [2021-12-21 16:11:26,170 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 16:11:26,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:11:26,242 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 1256 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:26,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 2063 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 16:11:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 16:11:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 16:11:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:11:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 16:11:26,248 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2021-12-21 16:11:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:26,249 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 16:11:26,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:11:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 16:11:26,249 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 16:11:26,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 16:11:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 16:11:26,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.