./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.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-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.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 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:07:31,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:07:31,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:07:31,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:07:31,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:07:31,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:07:31,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:07:31,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:07:31,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:07:31,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:07:31,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:07:31,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:07:31,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:07:31,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:07:31,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:07:31,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:07:31,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:07:31,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:07:31,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:07:31,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:07:31,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:07:31,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:07:31,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:07:31,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:07:31,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:07:31,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:07:31,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:07:31,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:07:31,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:07:31,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:07:31,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:07:31,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:07:31,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:07:31,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:07:31,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:07:31,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:07:31,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:07:31,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:07:31,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:07:31,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:07:31,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:07:31,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:07:31,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:07:31,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:07:31,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:07:31,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:07:31,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:07:31,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:07:31,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:07:31,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:07:31,939 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:07:31,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:07:31,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:07:31,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:07:31,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:07:31,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:07:31,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:07:31,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:07:31,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:07:31,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:07:31,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:07:31,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:07:31,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:07:31,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:07:31,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:07:31,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:07:31,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:07:31,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:07:31,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:07:31,944 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:07:31,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:07:31,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:07:31,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:07:31,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2021-12-21 16:07:32,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:07:32,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:07:32,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:07:32,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:07:32,232 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:07:32,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-12-21 16:07:32,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03e737dcf/35baa66562ae41e782d4b8db60290861/FLAG592019e87 [2021-12-21 16:07:32,994 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:07:32,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-12-21 16:07:33,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03e737dcf/35baa66562ae41e782d4b8db60290861/FLAG592019e87 [2021-12-21 16:07:33,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03e737dcf/35baa66562ae41e782d4b8db60290861 [2021-12-21 16:07:33,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:07:33,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:07:33,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:07:33,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:07:33,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:07:33,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:07:33" (1/1) ... [2021-12-21 16:07:33,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144f5b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:33, skipping insertion in model container [2021-12-21 16:07:33,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:07:33" (1/1) ... [2021-12-21 16:07:33,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:07:33,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:07:34,922 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-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-12-21 16:07:35,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:07:35,084 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:07:35,488 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-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-12-21 16:07:35,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:07:35,588 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:07:35,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35 WrapperNode [2021-12-21 16:07:35,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:07:35,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:07:35,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:07:35,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:07:35,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:35,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:35,936 INFO L137 Inliner]: procedures = 282, calls = 3066, calls flagged for inlining = 129, calls inlined = 120, statements flattened = 6764 [2021-12-21 16:07:35,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:07:35,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:07:35,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:07:35,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:07:35,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:35,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:07:36,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:07:36,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:07:36,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:07:36,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (1/1) ... [2021-12-21 16:07:36,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:07:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:07:36,354 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 16:07:36,379 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 16:07:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-12-21 16:07:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-12-21 16:07:36,402 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-12-21 16:07:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:07:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:07:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2021-12-21 16:07:36,403 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2021-12-21 16:07:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2021-12-21 16:07:36,403 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2021-12-21 16:07:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-12-21 16:07:36,403 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-12-21 16:07:36,404 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-12-21 16:07:36,404 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-12-21 16:07:36,404 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-12-21 16:07:36,404 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-12-21 16:07:36,404 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-21 16:07:36,404 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-21 16:07:36,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:07:36,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:07:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2021-12-21 16:07:36,405 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2021-12-21 16:07:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-21 16:07:36,405 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-21 16:07:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:07:36,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:07:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-12-21 16:07:36,406 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-12-21 16:07:36,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-21 16:07:36,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-21 16:07:36,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 16:07:36,406 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 16:07:36,406 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2021-12-21 16:07:36,406 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2021-12-21 16:07:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2021-12-21 16:07:36,407 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2021-12-21 16:07:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2021-12-21 16:07:36,407 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2021-12-21 16:07:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-21 16:07:36,408 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-21 16:07:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2021-12-21 16:07:36,408 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2021-12-21 16:07:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:07:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_st_ref_mutex [2021-12-21 16:07:36,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_st_ref_mutex [2021-12-21 16:07:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2021-12-21 16:07:36,409 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2021-12-21 16:07:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-12-21 16:07:36,409 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-12-21 16:07:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:07:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-12-21 16:07:36,409 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-12-21 16:07:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2021-12-21 16:07:36,410 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2021-12-21 16:07:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-12-21 16:07:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-21 16:07:36,411 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-21 16:07:36,411 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-12-21 16:07:36,412 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-12-21 16:07:36,412 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-12-21 16:07:36,412 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-12-21 16:07:36,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:07:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2021-12-21 16:07:36,413 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2021-12-21 16:07:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:07:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2021-12-21 16:07:36,413 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2021-12-21 16:07:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-21 16:07:36,413 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-21 16:07:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-12-21 16:07:36,414 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-12-21 16:07:36,414 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2021-12-21 16:07:36,414 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2021-12-21 16:07:36,414 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2021-12-21 16:07:36,414 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2021-12-21 16:07:36,414 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-12-21 16:07:36,414 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-12-21 16:07:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-21 16:07:36,415 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-21 16:07:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-21 16:07:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-21 16:07:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:07:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:07:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2021-12-21 16:07:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2021-12-21 16:07:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-21 16:07:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-21 16:07:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-21 16:07:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-21 16:07:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2021-12-21 16:07:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2021-12-21 16:07:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-12-21 16:07:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-12-21 16:07:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:07:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-21 16:07:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-21 16:07:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2021-12-21 16:07:36,419 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2021-12-21 16:07:36,419 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-12-21 16:07:36,419 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-12-21 16:07:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2021-12-21 16:07:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2021-12-21 16:07:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:07:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2021-12-21 16:07:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2021-12-21 16:07:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:07:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2021-12-21 16:07:36,421 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2021-12-21 16:07:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2021-12-21 16:07:36,421 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2021-12-21 16:07:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2021-12-21 16:07:36,421 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2021-12-21 16:07:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2021-12-21 16:07:36,422 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2021-12-21 16:07:36,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:07:36,422 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:07:36,422 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2021-12-21 16:07:36,422 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2021-12-21 16:07:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-12-21 16:07:36,423 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-12-21 16:07:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2021-12-21 16:07:36,426 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2021-12-21 16:07:36,426 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-12-21 16:07:36,426 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-12-21 16:07:36,426 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:07:36,428 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:07:36,428 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2021-12-21 16:07:36,428 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2021-12-21 16:07:36,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:07:36,433 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-12-21 16:07:36,434 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-12-21 16:07:36,434 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-12-21 16:07:36,434 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-12-21 16:07:36,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:07:36,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:07:36,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_st_ref_mutex [2021-12-21 16:07:36,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_st_ref_mutex [2021-12-21 16:07:36,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:07:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-21 16:07:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-21 16:07:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:07:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-12-21 16:07:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-12-21 16:07:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-12-21 16:07:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-12-21 16:07:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:07:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-21 16:07:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2021-12-21 16:07:36,436 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2021-12-21 16:07:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2021-12-21 16:07:36,436 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2021-12-21 16:07:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-12-21 16:07:36,436 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-12-21 16:07:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-12-21 16:07:36,437 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-12-21 16:07:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2021-12-21 16:07:36,437 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2021-12-21 16:07:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-21 16:07:36,437 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-21 16:07:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2021-12-21 16:07:36,437 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2021-12-21 16:07:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-12-21 16:07:36,438 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-12-21 16:07:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-12-21 16:07:36,438 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-12-21 16:07:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-12-21 16:07:36,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-12-21 16:07:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-21 16:07:36,438 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-21 16:07:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:07:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2021-12-21 16:07:36,439 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2021-12-21 16:07:36,439 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2021-12-21 16:07:36,439 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2021-12-21 16:07:36,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:07:36,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:07:37,305 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:07:37,309 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:07:44,809 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:07:44,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:07:44,827 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:07:44,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:07:44 BoogieIcfgContainer [2021-12-21 16:07:44,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:07:44,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:07:44,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:07:44,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:07:44,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:07:33" (1/3) ... [2021-12-21 16:07:44,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae11489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:07:44, skipping insertion in model container [2021-12-21 16:07:44,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:07:35" (2/3) ... [2021-12-21 16:07:44,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae11489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:07:44, skipping insertion in model container [2021-12-21 16:07:44,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:07:44" (3/3) ... [2021-12-21 16:07:44,839 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-12-21 16:07:44,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:07:44,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:07:44,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:07:44,918 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 16:07:44,919 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:07:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 2115 states, 1690 states have (on average 1.485207100591716) internal successors, (2510), 1712 states have internal predecessors, (2510), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) [2021-12-21 16:07:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 16:07:44,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:44,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:07:44,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash -652520665, now seen corresponding path program 1 times [2021-12-21 16:07:45,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:45,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035641251] [2021-12-21 16:07:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:45,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:45,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:45,508 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 16:07:45,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:45,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035641251] [2021-12-21 16:07:45,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035641251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:45,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:45,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:07:45,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095985755] [2021-12-21 16:07:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:45,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:07:45,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:07:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:45,554 INFO L87 Difference]: Start difference. First operand has 2115 states, 1690 states have (on average 1.485207100591716) internal successors, (2510), 1712 states have internal predecessors, (2510), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16:07:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:45,863 INFO L93 Difference]: Finished difference Result 4222 states and 6502 transitions. [2021-12-21 16:07:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:07:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2021-12-21 16:07:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:45,901 INFO L225 Difference]: With dead ends: 4222 [2021-12-21 16:07:45,902 INFO L226 Difference]: Without dead ends: 2109 [2021-12-21 16:07:45,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:45,929 INFO L933 BasicCegarLoop]: 3187 mSDtfsCounter, 3183 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3183 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:45,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3183 Valid, 3187 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:07:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-12-21 16:07:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2109. [2021-12-21 16:07:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 1686 states have (on average 1.4839857651245552) internal successors, (2502), 1706 states have internal predecessors, (2502), 345 states have call successors, (345), 78 states have call predecessors, (345), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-12-21 16:07:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3184 transitions. [2021-12-21 16:07:46,118 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3184 transitions. Word has length 18 [2021-12-21 16:07:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:46,119 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3184 transitions. [2021-12-21 16:07:46,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16:07:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3184 transitions. [2021-12-21 16:07:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 16:07:46,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:46,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:07:46,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:07:46,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash 48543913, now seen corresponding path program 1 times [2021-12-21 16:07:46,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:46,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966432503] [2021-12-21 16:07:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:46,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:46,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:46,302 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 16:07:46,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966432503] [2021-12-21 16:07:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966432503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:46,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:46,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:07:46,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870386311] [2021-12-21 16:07:46,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:46,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:07:46,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:07:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:46,320 INFO L87 Difference]: Start difference. First operand 2109 states and 3184 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16:07:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:46,423 INFO L93 Difference]: Finished difference Result 4211 states and 6359 transitions. [2021-12-21 16:07:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:07:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2021-12-21 16:07:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:46,439 INFO L225 Difference]: With dead ends: 4211 [2021-12-21 16:07:46,440 INFO L226 Difference]: Without dead ends: 2109 [2021-12-21 16:07:46,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:46,453 INFO L933 BasicCegarLoop]: 3182 mSDtfsCounter, 3177 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3177 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:46,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3177 Valid, 3182 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:07:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-12-21 16:07:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2109. [2021-12-21 16:07:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 1686 states have (on average 1.4833926453143536) internal successors, (2501), 1706 states have internal predecessors, (2501), 345 states have call successors, (345), 78 states have call predecessors, (345), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-12-21 16:07:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3183 transitions. [2021-12-21 16:07:46,546 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3183 transitions. Word has length 18 [2021-12-21 16:07:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:46,546 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3183 transitions. [2021-12-21 16:07:46,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16:07:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3183 transitions. [2021-12-21 16:07:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 16:07:46,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:46,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:07:46,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:07:46,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash -344483097, now seen corresponding path program 1 times [2021-12-21 16:07:46,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:46,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623405148] [2021-12-21 16:07:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:46,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:46,720 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 16:07:46,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623405148] [2021-12-21 16:07:46,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623405148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:46,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:46,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:07:46,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185055630] [2021-12-21 16:07:46,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:46,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:07:46,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:07:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:46,724 INFO L87 Difference]: Start difference. First operand 2109 states and 3183 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16:07:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:46,842 INFO L93 Difference]: Finished difference Result 2111 states and 3184 transitions. [2021-12-21 16:07:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:07:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2021-12-21 16:07:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:46,861 INFO L225 Difference]: With dead ends: 2111 [2021-12-21 16:07:46,861 INFO L226 Difference]: Without dead ends: 2108 [2021-12-21 16:07:46,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:46,869 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 3168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3168 SdHoareTripleChecker+Valid, 3180 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:46,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3168 Valid, 3180 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:07:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-21 16:07:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2108. [2021-12-21 16:07:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1686 states have (on average 1.482799525504152) internal successors, (2500), 1705 states have internal predecessors, (2500), 344 states have call successors, (344), 78 states have call predecessors, (344), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-12-21 16:07:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3181 transitions. [2021-12-21 16:07:46,953 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3181 transitions. Word has length 18 [2021-12-21 16:07:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:46,955 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3181 transitions. [2021-12-21 16:07:46,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16:07:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3181 transitions. [2021-12-21 16:07:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 16:07:46,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:46,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:07:46,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:07:46,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2089760103, now seen corresponding path program 1 times [2021-12-21 16:07:46,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:46,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060139813] [2021-12-21 16:07:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:46,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:47,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:47,148 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 16:07:47,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060139813] [2021-12-21 16:07:47,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060139813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:47,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:47,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:07:47,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621621029] [2021-12-21 16:07:47,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:47,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:07:47,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:07:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:47,151 INFO L87 Difference]: Start difference. First operand 2108 states and 3181 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16:07:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:47,363 INFO L93 Difference]: Finished difference Result 6200 states and 9371 transitions. [2021-12-21 16:07:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:07:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2021-12-21 16:07:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:47,392 INFO L225 Difference]: With dead ends: 6200 [2021-12-21 16:07:47,393 INFO L226 Difference]: Without dead ends: 4133 [2021-12-21 16:07:47,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:47,415 INFO L933 BasicCegarLoop]: 5185 mSDtfsCounter, 3163 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 8243 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:47,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3163 Valid, 8243 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:07:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-12-21 16:07:47,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4128. [2021-12-21 16:07:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 3314 states have (on average 1.4846107423053712) internal successors, (4920), 3345 states have internal predecessors, (4920), 662 states have call successors, (662), 153 states have call predecessors, (662), 151 states have return successors, (657), 651 states have call predecessors, (657), 651 states have call successors, (657) [2021-12-21 16:07:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6239 transitions. [2021-12-21 16:07:47,595 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6239 transitions. Word has length 19 [2021-12-21 16:07:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:47,595 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6239 transitions. [2021-12-21 16:07:47,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16:07:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6239 transitions. [2021-12-21 16:07:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 16:07:47,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:47,597 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] [2021-12-21 16:07:47,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:07:47,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash -358767574, now seen corresponding path program 1 times [2021-12-21 16:07:47,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:47,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426859210] [2021-12-21 16:07:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:47,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:47,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:47,703 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 16:07:47,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426859210] [2021-12-21 16:07:47,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426859210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:47,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:47,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:07:47,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562304266] [2021-12-21 16:07:47,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:47,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:07:47,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:07:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:47,706 INFO L87 Difference]: Start difference. First operand 4128 states and 6239 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 16:07:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:47,835 INFO L93 Difference]: Finished difference Result 4130 states and 6240 transitions. [2021-12-21 16:07:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:07:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-12-21 16:07:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:47,863 INFO L225 Difference]: With dead ends: 4130 [2021-12-21 16:07:47,864 INFO L226 Difference]: Without dead ends: 4127 [2021-12-21 16:07:47,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:47,869 INFO L933 BasicCegarLoop]: 3178 mSDtfsCounter, 3164 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3164 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:47,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3164 Valid, 3178 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:07:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-12-21 16:07:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4127. [2021-12-21 16:07:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 3314 states have (on average 1.484308992154496) internal successors, (4919), 3344 states have internal predecessors, (4919), 661 states have call successors, (661), 153 states have call predecessors, (661), 151 states have return successors, (657), 651 states have call predecessors, (657), 651 states have call successors, (657) [2021-12-21 16:07:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 6237 transitions. [2021-12-21 16:07:48,035 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 6237 transitions. Word has length 20 [2021-12-21 16:07:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:48,035 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 6237 transitions. [2021-12-21 16:07:48,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 16:07:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 6237 transitions. [2021-12-21 16:07:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 16:07:48,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:48,037 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] [2021-12-21 16:07:48,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:07:48,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1762398140, now seen corresponding path program 1 times [2021-12-21 16:07:48,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:48,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098960264] [2021-12-21 16:07:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:48,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,202 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 16:07:48,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:48,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098960264] [2021-12-21 16:07:48,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098960264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:48,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:48,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:07:48,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136511858] [2021-12-21 16:07:48,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:48,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:07:48,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:07:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:48,205 INFO L87 Difference]: Start difference. First operand 4127 states and 6237 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 16:07:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:48,335 INFO L93 Difference]: Finished difference Result 4199 states and 6295 transitions. [2021-12-21 16:07:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:07:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-12-21 16:07:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:48,361 INFO L225 Difference]: With dead ends: 4199 [2021-12-21 16:07:48,362 INFO L226 Difference]: Without dead ends: 4178 [2021-12-21 16:07:48,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:07:48,367 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 2999 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:48,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2999 Valid, 3365 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:07:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-12-21 16:07:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 4176. [2021-12-21 16:07:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.4766160262138814) internal successors, (4957), 3385 states have internal predecessors, (4957), 651 states have call successors, (651), 169 states have call predecessors, (651), 167 states have return successors, (649), 643 states have call predecessors, (649), 643 states have call successors, (649) [2021-12-21 16:07:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6257 transitions. [2021-12-21 16:07:48,530 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6257 transitions. Word has length 21 [2021-12-21 16:07:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6257 transitions. [2021-12-21 16:07:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 16:07:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6257 transitions. [2021-12-21 16:07:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 16:07:48,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:48,544 INFO L514 BasicCegarLoop]: trace histogram [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 16:07:48,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:07:48,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 311089182, now seen corresponding path program 1 times [2021-12-21 16:07:48,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942920647] [2021-12-21 16:07:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:48,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:07:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 16:07:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:07:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:07:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 16:07:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 16:07:48,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:48,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942920647] [2021-12-21 16:07:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942920647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:48,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:48,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:07:48,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090157122] [2021-12-21 16:07:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:48,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:07:48,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:07:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:07:48,836 INFO L87 Difference]: Start difference. First operand 4176 states and 6257 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:07:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:07:53,309 INFO L93 Difference]: Finished difference Result 8302 states and 12449 transitions. [2021-12-21 16:07:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:07:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2021-12-21 16:07:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:07:53,345 INFO L225 Difference]: With dead ends: 8302 [2021-12-21 16:07:53,346 INFO L226 Difference]: Without dead ends: 4179 [2021-12-21 16:07:53,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 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 16:07:53,365 INFO L933 BasicCegarLoop]: 4069 mSDtfsCounter, 4476 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4786 SdHoareTripleChecker+Valid, 7246 SdHoareTripleChecker+Invalid, 3392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:07:53,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4786 Valid, 7246 Invalid, 3392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-21 16:07:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-12-21 16:07:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 4176. [2021-12-21 16:07:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.476020256181114) internal successors, (4955), 3385 states have internal predecessors, (4955), 651 states have call successors, (651), 169 states have call predecessors, (651), 167 states have return successors, (643), 643 states have call predecessors, (643), 640 states have call successors, (643) [2021-12-21 16:07:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6249 transitions. [2021-12-21 16:07:53,521 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6249 transitions. Word has length 61 [2021-12-21 16:07:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:07:53,522 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6249 transitions. [2021-12-21 16:07:53,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:07:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6249 transitions. [2021-12-21 16:07:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 16:07:53,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:07:53,527 INFO L514 BasicCegarLoop]: trace histogram [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 16:07:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:07:53,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:07:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:07:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -533382689, now seen corresponding path program 1 times [2021-12-21 16:07:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:07:53,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55714743] [2021-12-21 16:07:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:07:53,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:07:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:07:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:07:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 16:07:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:07:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:07:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 16:07:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:07:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 16:07:53,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:07:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55714743] [2021-12-21 16:07:53,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55714743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:07:53,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:07:53,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:07:53,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204812637] [2021-12-21 16:07:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:07:53,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:07:53,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:07:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:07:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:07:53,760 INFO L87 Difference]: Start difference. First operand 4176 states and 6249 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:08:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:08:00,411 INFO L93 Difference]: Finished difference Result 6230 states and 9444 transitions. [2021-12-21 16:08:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:08:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2021-12-21 16:08:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:08:00,442 INFO L225 Difference]: With dead ends: 6230 [2021-12-21 16:08:00,442 INFO L226 Difference]: Without dead ends: 5207 [2021-12-21 16:08:00,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:08:00,452 INFO L933 BasicCegarLoop]: 4139 mSDtfsCounter, 2802 mSDsluCounter, 11997 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2938 SdHoareTripleChecker+Valid, 16136 SdHoareTripleChecker+Invalid, 6453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:08:00,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2938 Valid, 16136 Invalid, 6453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [634 Valid, 5819 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-21 16:08:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2021-12-21 16:08:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 3858. [2021-12-21 16:08:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3079 states have (on average 1.4624878207210132) internal successors, (4503), 3105 states have internal predecessors, (4503), 612 states have call successors, (612), 168 states have call predecessors, (612), 166 states have return successors, (606), 606 states have call predecessors, (606), 603 states have call successors, (606) [2021-12-21 16:08:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5721 transitions. [2021-12-21 16:08:00,640 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5721 transitions. Word has length 61 [2021-12-21 16:08:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:08:00,641 INFO L470 AbstractCegarLoop]: Abstraction has 3858 states and 5721 transitions. [2021-12-21 16:08:00,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:08:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5721 transitions. [2021-12-21 16:08:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 16:08:00,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:08:00,647 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:08:00,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:08:00,647 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:08:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:08:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1487077295, now seen corresponding path program 1 times [2021-12-21 16:08:00,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:08:00,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143222303] [2021-12-21 16:08:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:08:00,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:08:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:08:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:08:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:08:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 16:08:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 16:08:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:08:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 16:08:00,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:08:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143222303] [2021-12-21 16:08:00,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143222303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:08:00,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:08:00,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:08:00,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963209867] [2021-12-21 16:08:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:08:00,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:08:00,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:08:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:08:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:08:00,819 INFO L87 Difference]: Start difference. First operand 3858 states and 5721 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 16:08:05,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:08:09,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:08:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:08:11,381 INFO L93 Difference]: Finished difference Result 8734 states and 13155 transitions. [2021-12-21 16:08:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:08:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2021-12-21 16:08:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:08:11,411 INFO L225 Difference]: With dead ends: 8734 [2021-12-21 16:08:11,411 INFO L226 Difference]: Without dead ends: 4929 [2021-12-21 16:08:11,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:08:11,429 INFO L933 BasicCegarLoop]: 3043 mSDtfsCounter, 2483 mSDsluCounter, 3822 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 1060 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2776 SdHoareTripleChecker+Valid, 6865 SdHoareTripleChecker+Invalid, 4793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1060 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:08:11,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2776 Valid, 6865 Invalid, 4793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1060 Valid, 3731 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2021-12-21 16:08:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2021-12-21 16:08:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4650. [2021-12-21 16:08:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 3730 states have (on average 1.470509383378016) internal successors, (5485), 3761 states have internal predecessors, (5485), 753 states have call successors, (753), 168 states have call predecessors, (753), 166 states have return successors, (748), 748 states have call predecessors, (748), 744 states have call successors, (748) [2021-12-21 16:08:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6986 transitions. [2021-12-21 16:08:11,631 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6986 transitions. Word has length 63 [2021-12-21 16:08:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:08:11,631 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 6986 transitions. [2021-12-21 16:08:11,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 16:08:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6986 transitions. [2021-12-21 16:08:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 16:08:11,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:08:11,636 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 16:08:11,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:08:11,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:08:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:08:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1372433969, now seen corresponding path program 1 times [2021-12-21 16:08:11,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:08:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112388689] [2021-12-21 16:08:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:08:11,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:08:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:08:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:08:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 16:08:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:08:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:08:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 16:08:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:08:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 16:08:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 16:08:11,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:08:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112388689] [2021-12-21 16:08:11,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112388689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:08:11,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:08:11,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:08:11,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307370218] [2021-12-21 16:08:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:08:11,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:08:11,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:08:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:08:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:08:11,842 INFO L87 Difference]: Start difference. First operand 4650 states and 6986 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:08:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:08:18,399 INFO L93 Difference]: Finished difference Result 7940 states and 12018 transitions. [2021-12-21 16:08:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:08:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-12-21 16:08:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:08:18,432 INFO L225 Difference]: With dead ends: 7940 [2021-12-21 16:08:18,433 INFO L226 Difference]: Without dead ends: 6458 [2021-12-21 16:08:18,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:08:18,446 INFO L933 BasicCegarLoop]: 4130 mSDtfsCounter, 3706 mSDsluCounter, 10979 mSDsCounter, 0 mSdLazyCounter, 5817 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3842 SdHoareTripleChecker+Valid, 15109 SdHoareTripleChecker+Invalid, 6541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 5817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:08:18,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3842 Valid, 15109 Invalid, 6541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 5817 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-21 16:08:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-12-21 16:08:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 4648. [2021-12-21 16:08:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3728 states have (on average 1.470225321888412) internal successors, (5481), 3759 states have internal predecessors, (5481), 753 states have call successors, (753), 168 states have call predecessors, (753), 166 states have return successors, (748), 748 states have call predecessors, (748), 744 states have call successors, (748) [2021-12-21 16:08:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 6982 transitions. [2021-12-21 16:08:18,691 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 6982 transitions. Word has length 78 [2021-12-21 16:08:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:08:18,691 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 6982 transitions. [2021-12-21 16:08:18,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:08:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 6982 transitions. [2021-12-21 16:08:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 16:08:18,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:08:18,695 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:08:18,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 16:08:18,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:08:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:08:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1415994438, now seen corresponding path program 1 times [2021-12-21 16:08:18,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:08:18,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444462707] [2021-12-21 16:08:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:08:18,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:08:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:08:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:08:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:08:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:08:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:08:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:08:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 16:08:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 16:08:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 16:08:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:08:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:08:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:08:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 16:08:18,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:08:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444462707] [2021-12-21 16:08:18,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444462707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:08:18,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:08:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:08:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93795432] [2021-12-21 16:08:18,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:08:18,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:08:18,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:08:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:08:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:08:18,927 INFO L87 Difference]: Start difference. First operand 4648 states and 6982 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:08:24,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []