./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.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 19525e6f83ed492183d9a21eaa90e9685989ff90c55473d8827091d7561f2601 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 23:45:06,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 23:45:06,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 23:45:06,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 23:45:06,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 23:45:06,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 23:45:06,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 23:45:06,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 23:45:06,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 23:45:06,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 23:45:06,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 23:45:06,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 23:45:06,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 23:45:06,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 23:45:06,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 23:45:06,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 23:45:06,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 23:45:06,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 23:45:06,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 23:45:06,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 23:45:06,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 23:45:06,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 23:45:06,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 23:45:06,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 23:45:06,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 23:45:06,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 23:45:06,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 23:45:06,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 23:45:06,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 23:45:06,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 23:45:06,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 23:45:06,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 23:45:06,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 23:45:06,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 23:45:06,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 23:45:06,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 23:45:06,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 23:45:06,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 23:45:06,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 23:45:06,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 23:45:07,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 23:45:07,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 23:45:07,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 23:45:07,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 23:45:07,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 23:45:07,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 23:45:07,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 23:45:07,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 23:45:07,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 23:45:07,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 23:45:07,038 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 23:45:07,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 23:45:07,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 23:45:07,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 23:45:07,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 23:45:07,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 23:45:07,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 23:45:07,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 23:45:07,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 23:45:07,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 23:45:07,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 23:45:07,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 23:45:07,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 23:45:07,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 23:45:07,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 23:45:07,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 23:45:07,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 23:45:07,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 23:45:07,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 23:45:07,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 23:45:07,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 23:45:07,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 23:45:07,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 23:45:07,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19525e6f83ed492183d9a21eaa90e9685989ff90c55473d8827091d7561f2601 [2021-11-16 23:45:07,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 23:45:07,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 23:45:07,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 23:45:07,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 23:45:07,331 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 23:45:07,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2021-11-16 23:45:07,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f65f3f61/2d9630173de44aaeaa26290cab4e73c7/FLAGf421c5837 [2021-11-16 23:45:08,168 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 23:45:08,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2021-11-16 23:45:08,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f65f3f61/2d9630173de44aaeaa26290cab4e73c7/FLAGf421c5837 [2021-11-16 23:45:08,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f65f3f61/2d9630173de44aaeaa26290cab4e73c7 [2021-11-16 23:45:08,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 23:45:08,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 23:45:08,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 23:45:08,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 23:45:08,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 23:45:08,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:08" (1/1) ... [2021-11-16 23:45:08,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf84c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:08, skipping insertion in model container [2021-11-16 23:45:08,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:08" (1/1) ... [2021-11-16 23:45:08,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 23:45:08,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 23:45:09,858 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/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i[265597,265610] [2021-11-16 23:45:10,005 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 23:45:10,039 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 23:45:10,392 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/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i[265597,265610] [2021-11-16 23:45:10,405 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 23:45:10,506 INFO L208 MainTranslator]: Completed translation [2021-11-16 23:45:10,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10 WrapperNode [2021-11-16 23:45:10,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 23:45:10,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 23:45:10,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 23:45:10,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 23:45:10,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,721 INFO L137 Inliner]: procedures = 389, calls = 2919, calls flagged for inlining = 156, calls inlined = 64, statements flattened = 3272 [2021-11-16 23:45:10,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 23:45:10,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 23:45:10,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 23:45:10,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 23:45:10,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 23:45:10,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 23:45:10,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 23:45:10,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 23:45:10,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (1/1) ... [2021-11-16 23:45:10,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 23:45:10,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:45:11,016 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) [2021-11-16 23:45:11,038 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 [2021-11-16 23:45:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure smi_stats_proc_open [2021-11-16 23:45:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure smi_stats_proc_open [2021-11-16 23:45:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-16 23:45:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-16 23:45:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-16 23:45:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-16 23:45:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_poll [2021-11-16 23:45:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_poll [2021-11-16 23:45:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure format_lan_msg [2021-11-16 23:45:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure format_lan_msg [2021-11-16 23:45:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-16 23:45:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-16 23:45:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure copy_event_into_recv_msg [2021-11-16 23:45:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_event_into_recv_msg [2021-11-16 23:45:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_panic_request_and_wait [2021-11-16 23:45:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_panic_request_and_wait [2021-11-16 23:45:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-16 23:45:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-16 23:45:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_cmd_rcvrs_mutex_of_ipmi_smi [2021-11-16 23:45:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_cmd_rcvrs_mutex_of_ipmi_smi [2021-11-16 23:45:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure remove_proc_entry [2021-11-16 23:45:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_proc_entry [2021-11-16 23:45:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2021-11-16 23:45:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2021-11-16 23:45:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-16 23:45:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-16 23:45:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure intf_next_seq [2021-11-16 23:45:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_next_seq [2021-11-16 23:45:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 23:45:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_cmd_rcvrs_mutex_of_ipmi_smi [2021-11-16 23:45:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_cmd_rcvrs_mutex_of_ipmi_smi [2021-11-16 23:45:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure PDE [2021-11-16 23:45:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure PDE [2021-11-16 23:45:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-16 23:45:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-16 23:45:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-16 23:45:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-16 23:45:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure i_ipmi_request [2021-11-16 23:45:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure i_ipmi_request [2021-11-16 23:45:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-16 23:45:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure free_smi_msg_list [2021-11-16 23:45:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure free_smi_msg_list [2021-11-16 23:45:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-16 23:45:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-16 23:45:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-16 23:45:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 23:45:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-16 23:45:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-16 23:45:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure maintenance_mode_update [2021-11-16 23:45:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure maintenance_mode_update [2021-11-16 23:45:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-16 23:45:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-16 23:45:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-16 23:45:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-16 23:45:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2021-11-16 23:45:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2021-11-16 23:45:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 23:45:11,063 INFO L130 BoogieDeclarations]: Found specification of procedure smi_version_proc_open [2021-11-16 23:45:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure smi_version_proc_open [2021-11-16 23:45:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-16 23:45:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-16 23:45:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 23:45:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure send_channel_info_cmd [2021-11-16 23:45:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure send_channel_info_cmd [2021-11-16 23:45:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 23:45:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-16 23:45:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-16 23:45:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-16 23:45:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_alloc_smi_msg [2021-11-16 23:45:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_alloc_smi_msg [2021-11-16 23:45:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-16 23:45:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-16 23:45:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-16 23:45:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-16 23:45:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure handle_new_recv_msgs [2021-11-16 23:45:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_new_recv_msgs [2021-11-16 23:45:11,067 INFO L130 BoogieDeclarations]: Found specification of procedure is_lan_addr [2021-11-16 23:45:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure is_lan_addr [2021-11-16 23:45:11,067 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-16 23:45:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-16 23:45:11,067 INFO L130 BoogieDeclarations]: Found specification of procedure intf_free [2021-11-16 23:45:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_free [2021-11-16 23:45:11,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 23:45:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 23:45:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-16 23:45:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-16 23:45:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-16 23:45:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-16 23:45:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-16 23:45:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure intf_find_seq [2021-11-16 23:45:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_find_seq [2021-11-16 23:45:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-16 23:45:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-16 23:45:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-16 23:45:11,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-16 23:45:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-16 23:45:11,070 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-16 23:45:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_free_smi_msg [2021-11-16 23:45:11,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_free_smi_msg [2021-11-16 23:45:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-16 23:45:11,071 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-16 23:45:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 23:45:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-16 23:45:11,072 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-16 23:45:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure proc_mkdir [2021-11-16 23:45:11,072 INFO L138 BoogieDeclarations]: Found implementation of procedure proc_mkdir [2021-11-16 23:45:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 23:45:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 23:45:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure find_cmd_rcvr [2021-11-16 23:45:11,072 INFO L138 BoogieDeclarations]: Found implementation of procedure find_cmd_rcvr [2021-11-16 23:45:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-16 23:45:11,073 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-16 23:45:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_init_msghandler [2021-11-16 23:45:11,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_init_msghandler [2021-11-16 23:45:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-16 23:45:11,073 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-16 23:45:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure clean_up_interface_data [2021-11-16 23:45:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure clean_up_interface_data [2021-11-16 23:45:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_alloc_recv_msg [2021-11-16 23:45:11,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_alloc_recv_msg [2021-11-16 23:45:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2021-11-16 23:45:11,077 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2021-11-16 23:45:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-16 23:45:11,078 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-16 23:45:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure synchronize_rcu [2021-11-16 23:45:11,079 INFO L138 BoogieDeclarations]: Found implementation of procedure synchronize_rcu [2021-11-16 23:45:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2021-11-16 23:45:11,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2021-11-16 23:45:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure smi_ipmb_proc_open [2021-11-16 23:45:11,084 INFO L138 BoogieDeclarations]: Found implementation of procedure smi_ipmb_proc_open [2021-11-16 23:45:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-16 23:45:11,084 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-16 23:45:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 23:45:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-16 23:45:11,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-16 23:45:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_ipmb_addr [2021-11-16 23:45:11,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_ipmb_addr [2021-11-16 23:45:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_ipmb_bcast_addr [2021-11-16 23:45:11,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_ipmb_bcast_addr [2021-11-16 23:45:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_cpu_idle [2021-11-16 23:45:11,085 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_cpu_idle [2021-11-16 23:45:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-16 23:45:11,086 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-16 23:45:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure format_ipmb_msg [2021-11-16 23:45:11,086 INFO L138 BoogieDeclarations]: Found implementation of procedure format_ipmb_msg [2021-11-16 23:45:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-16 23:45:11,086 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-16 23:45:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure free_recv_msg_list [2021-11-16 23:45:11,086 INFO L138 BoogieDeclarations]: Found implementation of procedure free_recv_msg_list [2021-11-16 23:45:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-11-16 23:45:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-11-16 23:45:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-16 23:45:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-16 23:45:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-16 23:45:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-16 23:45:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure ipmb_checksum [2021-11-16 23:45:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmb_checksum [2021-11-16 23:45:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure deliver_response [2021-11-16 23:45:11,088 INFO L138 BoogieDeclarations]: Found implementation of procedure deliver_response [2021-11-16 23:45:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2021-11-16 23:45:11,088 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2021-11-16 23:45:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 23:45:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_free_recv_msg [2021-11-16 23:45:11,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_free_recv_msg [2021-11-16 23:45:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-16 23:45:11,089 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-16 23:45:11,089 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-16 23:45:11,592 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 23:45:11,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 23:45:19,702 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 23:45:19,723 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 23:45:19,723 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-16 23:45:19,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:19 BoogieIcfgContainer [2021-11-16 23:45:19,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 23:45:19,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 23:45:19,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 23:45:19,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 23:45:19,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:45:08" (1/3) ... [2021-11-16 23:45:19,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20226f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:19, skipping insertion in model container [2021-11-16 23:45:19,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:10" (2/3) ... [2021-11-16 23:45:19,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20226f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:19, skipping insertion in model container [2021-11-16 23:45:19,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:19" (3/3) ... [2021-11-16 23:45:19,736 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2021-11-16 23:45:19,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 23:45:19,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 23:45:19,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 23:45:19,801 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 [2021-11-16 23:45:19,802 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 23:45:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 1221 states, 841 states have (on average 1.3626634958382877) internal successors, (1146), 891 states have internal predecessors, (1146), 304 states have call successors, (304), 74 states have call predecessors, (304), 74 states have return successors, (304), 298 states have call predecessors, (304), 304 states have call successors, (304) [2021-11-16 23:45:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-16 23:45:19,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:45:19,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:45:19,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:45:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:45:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1371765540, now seen corresponding path program 1 times [2021-11-16 23:45:19,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:45:19,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572764604] [2021-11-16 23:45:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:45:19,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:45:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:45:20,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:45:20,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572764604] [2021-11-16 23:45:20,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572764604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:45:20,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:45:20,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:45:20,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895412533] [2021-11-16 23:45:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:45:20,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:45:20,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:45:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:45:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:45:20,339 INFO L87 Difference]: Start difference. First operand has 1221 states, 841 states have (on average 1.3626634958382877) internal successors, (1146), 891 states have internal predecessors, (1146), 304 states have call successors, (304), 74 states have call predecessors, (304), 74 states have return successors, (304), 298 states have call predecessors, (304), 304 states have call successors, (304) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:45:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:45:21,427 INFO L93 Difference]: Finished difference Result 3588 states and 5271 transitions. [2021-11-16 23:45:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:45:21,430 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-16 23:45:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:45:21,466 INFO L225 Difference]: With dead ends: 3588 [2021-11-16 23:45:21,466 INFO L226 Difference]: Without dead ends: 2366 [2021-11-16 23:45:21,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:45:21,488 INFO L933 BasicCegarLoop]: 2781 mSDtfsCounter, 1675 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 4481 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-16 23:45:21,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1675 Valid, 4481 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-16 23:45:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-11-16 23:45:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2362. [2021-11-16 23:45:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 1629 states have (on average 1.3597298956414978) internal successors, (2215), 1716 states have internal predecessors, (2215), 590 states have call successors, (590), 143 states have call predecessors, (590), 142 states have return successors, (580), 568 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-16 23:45:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3385 transitions. [2021-11-16 23:45:21,716 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3385 transitions. Word has length 16 [2021-11-16 23:45:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:45:21,717 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 3385 transitions. [2021-11-16 23:45:21,717 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:45:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3385 transitions. [2021-11-16 23:45:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-16 23:45:21,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:45:21,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:45:21,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 23:45:21,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:45:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:45:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash 24298474, now seen corresponding path program 1 times [2021-11-16 23:45:21,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:45:21,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065669064] [2021-11-16 23:45:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:45:21,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:45:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:21,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:45:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:45:21,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:45:21,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065669064] [2021-11-16 23:45:21,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065669064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:45:21,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:45:21,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 23:45:21,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253401518] [2021-11-16 23:45:21,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:45:21,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:45:21,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:45:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:45:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:45:21,937 INFO L87 Difference]: Start difference. First operand 2362 states and 3385 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-16 23:45:35,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:45:36,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:45:38,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:45:41,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:45:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:45:44,001 INFO L93 Difference]: Finished difference Result 7335 states and 10672 transitions. [2021-11-16 23:45:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 23:45:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 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 23 [2021-11-16 23:45:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:45:44,027 INFO L225 Difference]: With dead ends: 7335 [2021-11-16 23:45:44,027 INFO L226 Difference]: Without dead ends: 4976 [2021-11-16 23:45:44,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-16 23:45:44,037 INFO L933 BasicCegarLoop]: 2018 mSDtfsCounter, 2990 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 6317 mSolverCounterSat, 2076 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3315 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 8394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2076 IncrementalHoareTripleChecker+Valid, 6317 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2021-11-16 23:45:44,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3315 Valid, 2742 Invalid, 8394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2076 Valid, 6317 Invalid, 1 Unknown, 0 Unchecked, 21.6s Time] [2021-11-16 23:45:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-11-16 23:45:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4668. [2021-11-16 23:45:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 3222 states have (on average 1.3597144630664184) internal successors, (4381), 3388 states have internal predecessors, (4381), 1163 states have call successors, (1163), 282 states have call predecessors, (1163), 282 states have return successors, (1156), 1129 states have call predecessors, (1156), 1153 states have call successors, (1156) [2021-11-16 23:45:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 6700 transitions. [2021-11-16 23:45:44,286 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 6700 transitions. Word has length 23 [2021-11-16 23:45:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:45:44,287 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 6700 transitions. [2021-11-16 23:45:44,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-16 23:45:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 6700 transitions. [2021-11-16 23:45:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-16 23:45:44,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:45:44,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:45:44,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 23:45:44,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:45:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:45:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -46651610, now seen corresponding path program 1 times [2021-11-16 23:45:44,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:45:44,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092032614] [2021-11-16 23:45:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:45:44,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:45:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:44,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:45:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:45:44,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:45:44,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092032614] [2021-11-16 23:45:44,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092032614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:45:44,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:45:44,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 23:45:44,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684239811] [2021-11-16 23:45:44,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:45:44,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 23:45:44,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:45:44,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 23:45:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:45:44,494 INFO L87 Difference]: Start difference. First operand 4668 states and 6700 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 23:45:51,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:45:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:45:52,480 INFO L93 Difference]: Finished difference Result 8402 states and 12170 transitions. [2021-11-16 23:45:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:45:52,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-16 23:45:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:45:52,502 INFO L225 Difference]: With dead ends: 8402 [2021-11-16 23:45:52,502 INFO L226 Difference]: Without dead ends: 3737 [2021-11-16 23:45:52,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-16 23:45:52,521 INFO L933 BasicCegarLoop]: 1729 mSDtfsCounter, 2092 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2272 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-16 23:45:52,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2272 Valid, 3345 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-16 23:45:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-16 23:45:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3521. [2021-11-16 23:45:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 2430 states have (on average 1.3584362139917696) internal successors, (3301), 2557 states have internal predecessors, (3301), 877 states have call successors, (877), 213 states have call predecessors, (877), 213 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:45:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 5048 transitions. [2021-11-16 23:45:52,698 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 5048 transitions. Word has length 25 [2021-11-16 23:45:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:45:52,699 INFO L470 AbstractCegarLoop]: Abstraction has 3521 states and 5048 transitions. [2021-11-16 23:45:52,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 23:45:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 5048 transitions. [2021-11-16 23:45:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-16 23:45:52,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:45:52,702 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-16 23:45:52,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 23:45:52,703 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:45:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:45:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1054871817, now seen corresponding path program 1 times [2021-11-16 23:45:52,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:45:52,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217722733] [2021-11-16 23:45:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:45:52,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:45:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:45:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:45:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:45:52,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:45:52,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217722733] [2021-11-16 23:45:52,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217722733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:45:52,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:45:52,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:45:52,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278156253] [2021-11-16 23:45:52,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:45:52,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:45:52,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:45:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:45:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:45:52,883 INFO L87 Difference]: Start difference. First operand 3521 states and 5048 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-11-16 23:45:59,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:45:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:45:59,948 INFO L93 Difference]: Finished difference Result 3759 states and 5483 transitions. [2021-11-16 23:45:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:45:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 35 [2021-11-16 23:45:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:45:59,967 INFO L225 Difference]: With dead ends: 3759 [2021-11-16 23:45:59,967 INFO L226 Difference]: Without dead ends: 3755 [2021-11-16 23:45:59,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:45:59,969 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 1832 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 561 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-16 23:45:59,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1990 Valid, 1811 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 1058 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-16 23:45:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2021-11-16 23:46:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3537. [2021-11-16 23:46:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 2442 states have (on average 1.355036855036855) internal successors, (3309), 2567 states have internal predecessors, (3309), 875 states have call successors, (875), 219 states have call predecessors, (875), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 5054 transitions. [2021-11-16 23:46:00,118 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 5054 transitions. Word has length 35 [2021-11-16 23:46:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:00,118 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 5054 transitions. [2021-11-16 23:46:00,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-11-16 23:46:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 5054 transitions. [2021-11-16 23:46:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-16 23:46:00,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:00,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:00,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 23:46:00,120 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:00,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1659366227, now seen corresponding path program 1 times [2021-11-16 23:46:00,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:00,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437668754] [2021-11-16 23:46:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:00,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:00,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:00,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437668754] [2021-11-16 23:46:00,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437668754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:00,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:00,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:00,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686101388] [2021-11-16 23:46:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:00,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:00,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:00,260 INFO L87 Difference]: Start difference. First operand 3537 states and 5054 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-16 23:46:01,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:09,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:46:09,325 INFO L93 Difference]: Finished difference Result 3755 states and 5476 transitions. [2021-11-16 23:46:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:46:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 36 [2021-11-16 23:46:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:46:09,344 INFO L225 Difference]: With dead ends: 3755 [2021-11-16 23:46:09,344 INFO L226 Difference]: Without dead ends: 3752 [2021-11-16 23:46:09,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:46:09,346 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 1852 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 538 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-16 23:46:09,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2041 Valid, 1776 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1046 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-16 23:46:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-16 23:46:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3536. [2021-11-16 23:46:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 2442 states have (on average 1.3546273546273546) internal successors, (3308), 2566 states have internal predecessors, (3308), 874 states have call successors, (874), 219 states have call predecessors, (874), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 5052 transitions. [2021-11-16 23:46:09,521 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 5052 transitions. Word has length 36 [2021-11-16 23:46:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:09,522 INFO L470 AbstractCegarLoop]: Abstraction has 3536 states and 5052 transitions. [2021-11-16 23:46:09,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-16 23:46:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 5052 transitions. [2021-11-16 23:46:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-16 23:46:09,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:09,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:09,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 23:46:09,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash 98605196, now seen corresponding path program 1 times [2021-11-16 23:46:09,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:09,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508266913] [2021-11-16 23:46:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:09,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:09,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:09,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508266913] [2021-11-16 23:46:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508266913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:09,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:09,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:09,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415107585] [2021-11-16 23:46:09,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:09,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:09,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:09,650 INFO L87 Difference]: Start difference. First operand 3536 states and 5052 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-11-16 23:46:13,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:15,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:46:16,577 INFO L93 Difference]: Finished difference Result 3754 states and 5474 transitions. [2021-11-16 23:46:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:46:16,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 37 [2021-11-16 23:46:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:46:16,595 INFO L225 Difference]: With dead ends: 3754 [2021-11-16 23:46:16,596 INFO L226 Difference]: Without dead ends: 3751 [2021-11-16 23:46:16,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:46:16,598 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1850 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-16 23:46:16,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2038 Valid, 1775 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-16 23:46:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2021-11-16 23:46:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3535. [2021-11-16 23:46:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 2442 states have (on average 1.3542178542178542) internal successors, (3307), 2565 states have internal predecessors, (3307), 873 states have call successors, (873), 219 states have call predecessors, (873), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5050 transitions. [2021-11-16 23:46:16,795 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5050 transitions. Word has length 37 [2021-11-16 23:46:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:16,796 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 5050 transitions. [2021-11-16 23:46:16,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-11-16 23:46:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5050 transitions. [2021-11-16 23:46:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-16 23:46:16,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:16,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:16,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 23:46:16,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1238850672, now seen corresponding path program 1 times [2021-11-16 23:46:16,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:16,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653936998] [2021-11-16 23:46:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:17,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:17,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653936998] [2021-11-16 23:46:17,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653936998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:17,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:17,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:17,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420022624] [2021-11-16 23:46:17,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:17,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:17,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:17,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:17,027 INFO L87 Difference]: Start difference. First operand 3535 states and 5050 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-11-16 23:46:18,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:24,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:46:24,233 INFO L93 Difference]: Finished difference Result 3753 states and 5472 transitions. [2021-11-16 23:46:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:46:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 38 [2021-11-16 23:46:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:46:24,251 INFO L225 Difference]: With dead ends: 3753 [2021-11-16 23:46:24,251 INFO L226 Difference]: Without dead ends: 3750 [2021-11-16 23:46:24,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:46:24,254 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 1847 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 534 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:46:24,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2030 Valid, 1782 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1046 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2021-11-16 23:46:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2021-11-16 23:46:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3534. [2021-11-16 23:46:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 2442 states have (on average 1.3538083538083538) internal successors, (3306), 2564 states have internal predecessors, (3306), 872 states have call successors, (872), 219 states have call predecessors, (872), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 5048 transitions. [2021-11-16 23:46:24,411 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 5048 transitions. Word has length 38 [2021-11-16 23:46:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:24,412 INFO L470 AbstractCegarLoop]: Abstraction has 3534 states and 5048 transitions. [2021-11-16 23:46:24,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-11-16 23:46:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 5048 transitions. [2021-11-16 23:46:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-16 23:46:24,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:24,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:24,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 23:46:24,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:24,415 INFO L85 PathProgramCache]: Analyzing trace with hash 249695247, now seen corresponding path program 1 times [2021-11-16 23:46:24,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:24,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103542101] [2021-11-16 23:46:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:24,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:24,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:24,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:24,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103542101] [2021-11-16 23:46:24,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103542101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:24,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:24,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:24,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017094109] [2021-11-16 23:46:24,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:24,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:24,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:24,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:24,541 INFO L87 Difference]: Start difference. First operand 3534 states and 5048 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-16 23:46:26,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:30,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:32,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:33,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:46:34,043 INFO L93 Difference]: Finished difference Result 3752 states and 5470 transitions. [2021-11-16 23:46:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:46:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 39 [2021-11-16 23:46:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:46:34,066 INFO L225 Difference]: With dead ends: 3752 [2021-11-16 23:46:34,066 INFO L226 Difference]: Without dead ends: 3749 [2021-11-16 23:46:34,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:46:34,070 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 1844 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 533 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-16 23:46:34,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2035 Valid, 1763 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1045 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-11-16 23:46:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-11-16 23:46:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3533. [2021-11-16 23:46:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2442 states have (on average 1.3533988533988535) internal successors, (3305), 2563 states have internal predecessors, (3305), 871 states have call successors, (871), 219 states have call predecessors, (871), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5046 transitions. [2021-11-16 23:46:34,246 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5046 transitions. Word has length 39 [2021-11-16 23:46:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:34,247 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5046 transitions. [2021-11-16 23:46:34,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-16 23:46:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5046 transitions. [2021-11-16 23:46:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-16 23:46:34,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:34,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:34,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-16 23:46:34,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash -850016653, now seen corresponding path program 1 times [2021-11-16 23:46:34,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:34,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326272737] [2021-11-16 23:46:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:34,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:34,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:34,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:34,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326272737] [2021-11-16 23:46:34,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326272737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:34,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:34,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:34,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485630688] [2021-11-16 23:46:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:34,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:34,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:34,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:34,359 INFO L87 Difference]: Start difference. First operand 3533 states and 5046 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-16 23:46:35,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:37,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:43,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:46:43,968 INFO L93 Difference]: Finished difference Result 3751 states and 5468 transitions. [2021-11-16 23:46:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:46:43,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 40 [2021-11-16 23:46:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:46:43,980 INFO L225 Difference]: With dead ends: 3751 [2021-11-16 23:46:43,981 INFO L226 Difference]: Without dead ends: 3748 [2021-11-16 23:46:43,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:46:43,983 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 1841 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 534 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-16 23:46:43,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2026 Valid, 1771 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1045 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-11-16 23:46:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-16 23:46:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3532. [2021-11-16 23:46:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3532 states, 2442 states have (on average 1.352989352989353) internal successors, (3304), 2562 states have internal predecessors, (3304), 870 states have call successors, (870), 219 states have call predecessors, (870), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3532 states to 3532 states and 5044 transitions. [2021-11-16 23:46:44,145 INFO L78 Accepts]: Start accepts. Automaton has 3532 states and 5044 transitions. Word has length 40 [2021-11-16 23:46:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:44,145 INFO L470 AbstractCegarLoop]: Abstraction has 3532 states and 5044 transitions. [2021-11-16 23:46:44,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-16 23:46:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3532 states and 5044 transitions. [2021-11-16 23:46:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-16 23:46:44,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:44,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:44,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-16 23:46:44,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash -581342318, now seen corresponding path program 1 times [2021-11-16 23:46:44,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:44,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439153766] [2021-11-16 23:46:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:44,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:44,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:44,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:44,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439153766] [2021-11-16 23:46:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439153766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:44,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:44,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9402709] [2021-11-16 23:46:44,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:44,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:44,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:44,340 INFO L87 Difference]: Start difference. First operand 3532 states and 5044 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2021-11-16 23:46:48,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:50,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:54,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:46:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:46:54,198 INFO L93 Difference]: Finished difference Result 3750 states and 5466 transitions. [2021-11-16 23:46:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:46:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 41 [2021-11-16 23:46:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:46:54,230 INFO L225 Difference]: With dead ends: 3750 [2021-11-16 23:46:54,230 INFO L226 Difference]: Without dead ends: 3747 [2021-11-16 23:46:54,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:46:54,232 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1837 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 533 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-16 23:46:54,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2022 Valid, 1769 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1046 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-11-16 23:46:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-16 23:46:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3531. [2021-11-16 23:46:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2442 states have (on average 1.3525798525798525) internal successors, (3303), 2561 states have internal predecessors, (3303), 869 states have call successors, (869), 219 states have call predecessors, (869), 219 states have return successors, (870), 849 states have call predecessors, (870), 867 states have call successors, (870) [2021-11-16 23:46:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 5042 transitions. [2021-11-16 23:46:54,406 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 5042 transitions. Word has length 41 [2021-11-16 23:46:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:46:54,408 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 5042 transitions. [2021-11-16 23:46:54,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2021-11-16 23:46:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 5042 transitions. [2021-11-16 23:46:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-16 23:46:54,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:46:54,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:46:54,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-16 23:46:54,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:46:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:46:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash -842367658, now seen corresponding path program 1 times [2021-11-16 23:46:54,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:46:54,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164555712] [2021-11-16 23:46:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:46:54,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:46:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:54,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:46:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:46:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 23:46:54,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:46:54,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164555712] [2021-11-16 23:46:54,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164555712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:46:54,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:46:54,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:46:54,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603583473] [2021-11-16 23:46:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:46:54,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:46:54,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:46:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:46:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:46:54,578 INFO L87 Difference]: Start difference. First operand 3531 states and 5042 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2021-11-16 23:46:56,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:01,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:03,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:47:03,913 INFO L93 Difference]: Finished difference Result 3749 states and 5464 transitions. [2021-11-16 23:47:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:47:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 42 [2021-11-16 23:47:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:47:03,976 INFO L225 Difference]: With dead ends: 3749 [2021-11-16 23:47:03,976 INFO L226 Difference]: Without dead ends: 3718 [2021-11-16 23:47:03,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:47:03,980 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 1835 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 530 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:47:03,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2017 Valid, 1774 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 1043 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2021-11-16 23:47:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-11-16 23:47:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3502. [2021-11-16 23:47:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 2419 states have (on average 1.3538652335675898) internal successors, (3275), 2537 states have internal predecessors, (3275), 864 states have call successors, (864), 218 states have call predecessors, (864), 218 states have return successors, (866), 845 states have call predecessors, (866), 863 states have call successors, (866) [2021-11-16 23:47:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 5005 transitions. [2021-11-16 23:47:04,287 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 5005 transitions. Word has length 42 [2021-11-16 23:47:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:47:04,287 INFO L470 AbstractCegarLoop]: Abstraction has 3502 states and 5005 transitions. [2021-11-16 23:47:04,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2021-11-16 23:47:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 5005 transitions. [2021-11-16 23:47:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-16 23:47:04,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:47:04,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:47:04,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-16 23:47:04,295 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:47:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:47:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash -583483614, now seen corresponding path program 1 times [2021-11-16 23:47:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:47:04,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059793266] [2021-11-16 23:47:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:47:04,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:47:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 23:47:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:47:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 23:47:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 23:47:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:47:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:47:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 23:47:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 23:47:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 23:47:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 23:47:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 23:47:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-16 23:47:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-16 23:47:04,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:47:04,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059793266] [2021-11-16 23:47:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059793266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:47:04,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:47:04,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 23:47:04,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040827112] [2021-11-16 23:47:04,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:47:04,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 23:47:04,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:47:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 23:47:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:47:04,519 INFO L87 Difference]: Start difference. First operand 3502 states and 5005 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (20), 7 states have call predecessors, (20), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-16 23:47:06,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:12,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:16,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:19,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:47:19,155 INFO L93 Difference]: Finished difference Result 7278 states and 10905 transitions. [2021-11-16 23:47:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 23:47:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (20), 7 states have call predecessors, (20), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-11-16 23:47:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:47:19,170 INFO L225 Difference]: With dead ends: 7278 [2021-11-16 23:47:19,170 INFO L226 Difference]: Without dead ends: 3779 [2021-11-16 23:47:19,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-16 23:47:19,185 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 1799 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 1289 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 4645 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1289 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-11-16 23:47:19,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2027 Valid, 4645 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1289 Valid, 2772 Invalid, 4 Unknown, 0 Unchecked, 14.4s Time] [2021-11-16 23:47:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-11-16 23:47:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 2587. [2021-11-16 23:47:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 1818 states have (on average 1.3674367436743675) internal successors, (2486), 1897 states have internal predecessors, (2486), 605 states have call successors, (605), 163 states have call predecessors, (605), 163 states have return successors, (607), 592 states have call predecessors, (607), 604 states have call successors, (607) [2021-11-16 23:47:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 3698 transitions. [2021-11-16 23:47:19,380 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 3698 transitions. Word has length 119 [2021-11-16 23:47:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:47:19,380 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 3698 transitions. [2021-11-16 23:47:19,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (20), 7 states have call predecessors, (20), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-16 23:47:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 3698 transitions. [2021-11-16 23:47:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-16 23:47:19,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:47:19,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:47:19,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-16 23:47:19,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:47:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:47:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash -880432739, now seen corresponding path program 1 times [2021-11-16 23:47:19,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:47:19,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344549733] [2021-11-16 23:47:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:47:19,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:47:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:47:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 23:47:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 23:47:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 23:47:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 23:47:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:47:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:47:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 23:47:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 23:47:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 23:47:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 23:47:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-16 23:47:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-16 23:47:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:47:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 23:47:19,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:47:19,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344549733] [2021-11-16 23:47:19,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344549733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:47:19,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:47:19,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 23:47:19,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864859902] [2021-11-16 23:47:19,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:47:19,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 23:47:19,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:47:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 23:47:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-16 23:47:19,709 INFO L87 Difference]: Start difference. First operand 2587 states and 3698 transitions. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (21), 9 states have call predecessors, (21), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 23:47:30,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:32,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:34,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:38,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:40,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:42,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:44,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:47:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:47:47,016 INFO L93 Difference]: Finished difference Result 3730 states and 5845 transitions. [2021-11-16 23:47:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 23:47:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (21), 9 states have call predecessors, (21), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-11-16 23:47:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:47:47,018 INFO L225 Difference]: With dead ends: 3730 [2021-11-16 23:47:47,018 INFO L226 Difference]: Without dead ends: 0 [2021-11-16 23:47:47,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-16 23:47:47,034 INFO L933 BasicCegarLoop]: 1524 mSDtfsCounter, 1622 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 5754 mSolverCounterSat, 1260 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 5308 SdHoareTripleChecker+Invalid, 7017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1260 IncrementalHoareTripleChecker+Valid, 5754 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:47:47,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1797 Valid, 5308 Invalid, 7017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1260 Valid, 5754 Invalid, 3 Unknown, 0 Unchecked, 27.0s Time] [2021-11-16 23:47:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-16 23:47:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-16 23:47:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:47:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-16 23:47:47,037 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2021-11-16 23:47:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:47:47,037 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-16 23:47:47,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (21), 9 states have call predecessors, (21), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 23:47:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-16 23:47:47,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-16 23:47:47,040 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-16 23:47:47,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-16 23:47:47,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-16 23:47:56,268 WARN L227 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:04,610 WARN L227 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:12,954 WARN L227 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:22,147 WARN L227 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:29,686 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:38,064 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:46,353 WARN L227 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:48:54,689 WARN L227 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:03,814 WARN L227 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:11,329 WARN L227 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:22,137 WARN L227 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:29,607 WARN L227 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:37,086 WARN L227 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:44,655 WARN L227 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:49:52,991 WARN L227 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:50:00,490 WARN L227 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:51:20,853 WARN L227 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:53:10,444 WARN L227 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:53:17,955 WARN L227 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:53:49,188 WARN L227 SmtUtils]: Spent 13.57s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:54:07,165 WARN L227 SmtUtils]: Spent 13.56s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:54:25,243 WARN L227 SmtUtils]: Spent 13.61s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:54:38,846 WARN L227 SmtUtils]: Spent 13.60s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:54:52,425 WARN L227 SmtUtils]: Spent 13.58s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:55:08,963 WARN L227 SmtUtils]: Spent 13.59s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:55:22,557 WARN L227 SmtUtils]: Spent 13.59s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:55:37,703 WARN L227 SmtUtils]: Spent 13.66s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:55:52,854 WARN L227 SmtUtils]: Spent 13.66s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:56:07,992 WARN L227 SmtUtils]: Spent 13.64s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:56:23,092 WARN L227 SmtUtils]: Spent 13.62s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:56:36,732 WARN L227 SmtUtils]: Spent 13.64s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:56:50,325 WARN L227 SmtUtils]: Spent 13.59s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:57:03,986 WARN L227 SmtUtils]: Spent 13.66s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:57:22,100 WARN L227 SmtUtils]: Spent 13.65s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:57:35,754 WARN L227 SmtUtils]: Spent 13.65s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:57:50,956 WARN L227 SmtUtils]: Spent 13.65s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:58:09,112 WARN L227 SmtUtils]: Spent 13.68s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:58:27,209 WARN L227 SmtUtils]: Spent 13.64s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:58:40,896 WARN L227 SmtUtils]: Spent 13.68s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:58:54,580 WARN L227 SmtUtils]: Spent 13.68s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:59:11,237 WARN L227 SmtUtils]: Spent 13.68s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15