./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 e19ca921 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 0.2.2-dev-e19ca92 [2021-12-22 14:29:57,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:29:57,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:29:57,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:29:57,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:29:57,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:29:57,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:29:57,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:29:57,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:29:57,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:29:57,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:29:57,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:29:57,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:29:57,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:29:57,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:29:57,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:29:57,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:29:57,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:29:57,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:29:57,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:29:57,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:29:57,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:29:57,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:29:57,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:29:57,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:29:57,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:29:57,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:29:57,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:29:57,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:29:57,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:29:57,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:29:57,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:29:57,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:29:57,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:29:57,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:29:57,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:29:57,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:29:57,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:29:57,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:29:57,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:29:57,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:29:57,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:29:57,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:29:57,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:29:57,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:29:57,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:29:57,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:29:57,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:29:57,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:29:57,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:29:57,436 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:29:57,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:29:57,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:29:57,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:29:57,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:29:57,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:29:57,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:29:57,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:29:57,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:29:57,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:29:57,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:29:57,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:29:57,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:29:57,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:29:57,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:29:57,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:29:57,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:29:57,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:29:57,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:29:57,440 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:29:57,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:29:57,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:29:57,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:29:57,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19525e6f83ed492183d9a21eaa90e9685989ff90c55473d8827091d7561f2601 [2021-12-22 14:29:57,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:29:57,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:29:57,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:29:57,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:29:57,657 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:29:57,658 INFO L432 ainManager$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 [2021-12-22 14:29:57,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99f9dd83/7e05c29630b5444894f06f95c74ae98c/FLAGeabc83624 [2021-12-22 14:29:58,376 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:29:58,376 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 [2021-12-22 14:29:58,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99f9dd83/7e05c29630b5444894f06f95c74ae98c/FLAGeabc83624 [2021-12-22 14:29:58,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99f9dd83/7e05c29630b5444894f06f95c74ae98c [2021-12-22 14:29:58,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:29:58,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:29:58,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:29:58,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:29:58,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:29:58,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:29:58" (1/1) ... [2021-12-22 14:29:58,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b44a211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:58, skipping insertion in model container [2021-12-22 14:29:58,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:29:58" (1/1) ... [2021-12-22 14:29:58,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:29:58,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:30:00,249 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] [2021-12-22 14:30:00,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:30:00,409 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:30:00,761 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] [2021-12-22 14:30:00,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:30:00,861 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:30:00,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00 WrapperNode [2021-12-22 14:30:00,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:30:00,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:30:00,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:30:00,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:30:00,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:00,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,121 INFO L137 Inliner]: procedures = 389, calls = 2919, calls flagged for inlining = 156, calls inlined = 64, statements flattened = 3287 [2021-12-22 14:30:01,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:30:01,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:30:01,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:30:01,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:30:01,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:30:01,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:30:01,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:30:01,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:30:01,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (1/1) ... [2021-12-22 14:30:01,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:30:01,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:01,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:30:01,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure smi_stats_proc_open [2021-12-22 14:30:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure smi_stats_proc_open [2021-12-22 14:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-12-22 14:30:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-12-22 14:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_poll [2021-12-22 14:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_poll [2021-12-22 14:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure format_lan_msg [2021-12-22 14:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure format_lan_msg [2021-12-22 14:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-12-22 14:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-12-22 14:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure copy_event_into_recv_msg [2021-12-22 14:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_event_into_recv_msg [2021-12-22 14:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_panic_request_and_wait [2021-12-22 14:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_panic_request_and_wait [2021-12-22 14:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 14:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 14:30:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_cmd_rcvrs_mutex_of_ipmi_smi [2021-12-22 14:30:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_cmd_rcvrs_mutex_of_ipmi_smi [2021-12-22 14:30:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure remove_proc_entry [2021-12-22 14:30:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_proc_entry [2021-12-22 14:30:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2021-12-22 14:30:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2021-12-22 14:30:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 14:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 14:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure intf_next_seq [2021-12-22 14:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_next_seq [2021-12-22 14:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_cmd_rcvrs_mutex_of_ipmi_smi [2021-12-22 14:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_cmd_rcvrs_mutex_of_ipmi_smi [2021-12-22 14:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure PDE [2021-12-22 14:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure PDE [2021-12-22 14:30:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-22 14:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-22 14:30:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-22 14:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-22 14:30:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure i_ipmi_request [2021-12-22 14:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure i_ipmi_request [2021-12-22 14:30:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:30:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure free_smi_msg_list [2021-12-22 14:30:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure free_smi_msg_list [2021-12-22 14:30:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:30:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-12-22 14:30:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-12-22 14:30:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:30:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:30:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:30:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure maintenance_mode_update [2021-12-22 14:30:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure maintenance_mode_update [2021-12-22 14:30:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-12-22 14:30:01,389 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-12-22 14:30:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-12-22 14:30:01,389 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-12-22 14:30:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2021-12-22 14:30:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2021-12-22 14:30:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:30:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure smi_version_proc_open [2021-12-22 14:30:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure smi_version_proc_open [2021-12-22 14:30:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-22 14:30:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-22 14:30:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:30:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure send_channel_info_cmd [2021-12-22 14:30:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure send_channel_info_cmd [2021-12-22 14:30:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:30:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-22 14:30:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:30:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:30:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_alloc_smi_msg [2021-12-22 14:30:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_alloc_smi_msg [2021-12-22 14:30:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-12-22 14:30:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-12-22 14:30:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-22 14:30:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-22 14:30:01,394 INFO L130 BoogieDeclarations]: Found specification of procedure handle_new_recv_msgs [2021-12-22 14:30:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_new_recv_msgs [2021-12-22 14:30:01,394 INFO L130 BoogieDeclarations]: Found specification of procedure is_lan_addr [2021-12-22 14:30:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure is_lan_addr [2021-12-22 14:30:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-22 14:30:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-22 14:30:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure intf_free [2021-12-22 14:30:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_free [2021-12-22 14:30:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:30:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:30:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-12-22 14:30:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-12-22 14:30:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-12-22 14:30:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:30:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:30:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure intf_find_seq [2021-12-22 14:30:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_find_seq [2021-12-22 14:30:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-22 14:30:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-22 14:30:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:30:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:30:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-22 14:30:01,398 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-22 14:30:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_free_smi_msg [2021-12-22 14:30:01,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_free_smi_msg [2021-12-22 14:30:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-22 14:30:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-22 14:30:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:30:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-22 14:30:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-22 14:30:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure proc_mkdir [2021-12-22 14:30:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure proc_mkdir [2021-12-22 14:30:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:30:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:30:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure find_cmd_rcvr [2021-12-22 14:30:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure find_cmd_rcvr [2021-12-22 14:30:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-22 14:30:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-22 14:30:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_init_msghandler [2021-12-22 14:30:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_init_msghandler [2021-12-22 14:30:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-22 14:30:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-22 14:30:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure clean_up_interface_data [2021-12-22 14:30:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure clean_up_interface_data [2021-12-22 14:30:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_alloc_recv_msg [2021-12-22 14:30:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_alloc_recv_msg [2021-12-22 14:30:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2021-12-22 14:30:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2021-12-22 14:30:01,435 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-12-22 14:30:01,435 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-12-22 14:30:01,435 INFO L130 BoogieDeclarations]: Found specification of procedure synchronize_rcu [2021-12-22 14:30:01,435 INFO L138 BoogieDeclarations]: Found implementation of procedure synchronize_rcu [2021-12-22 14:30:01,435 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2021-12-22 14:30:01,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2021-12-22 14:30:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure smi_ipmb_proc_open [2021-12-22 14:30:01,436 INFO L138 BoogieDeclarations]: Found implementation of procedure smi_ipmb_proc_open [2021-12-22 14:30:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:30:01,436 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:30:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:30:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:30:01,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:30:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure is_ipmb_addr [2021-12-22 14:30:01,436 INFO L138 BoogieDeclarations]: Found implementation of procedure is_ipmb_addr [2021-12-22 14:30:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure is_ipmb_bcast_addr [2021-12-22 14:30:01,436 INFO L138 BoogieDeclarations]: Found implementation of procedure is_ipmb_bcast_addr [2021-12-22 14:30:01,437 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_cpu_idle [2021-12-22 14:30:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_cpu_idle [2021-12-22 14:30:01,437 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-22 14:30:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-22 14:30:01,437 INFO L130 BoogieDeclarations]: Found specification of procedure format_ipmb_msg [2021-12-22 14:30:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure format_ipmb_msg [2021-12-22 14:30:01,437 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-12-22 14:30:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-12-22 14:30:01,437 INFO L130 BoogieDeclarations]: Found specification of procedure free_recv_msg_list [2021-12-22 14:30:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure free_recv_msg_list [2021-12-22 14:30:01,437 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-12-22 14:30:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-12-22 14:30:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-12-22 14:30:01,438 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-12-22 14:30:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-22 14:30:01,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-22 14:30:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure ipmb_checksum [2021-12-22 14:30:01,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmb_checksum [2021-12-22 14:30:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure deliver_response [2021-12-22 14:30:01,438 INFO L138 BoogieDeclarations]: Found implementation of procedure deliver_response [2021-12-22 14:30:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2021-12-22 14:30:01,438 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2021-12-22 14:30:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:30:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_free_recv_msg [2021-12-22 14:30:01,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_free_recv_msg [2021-12-22 14:30:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-12-22 14:30:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-12-22 14:30:01,441 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-12-22 14:30:01,984 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:30:01,988 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:30:07,654 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:30:07,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:30:07,667 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:30:07,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:30:07 BoogieIcfgContainer [2021-12-22 14:30:07,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:30:07,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:30:07,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:30:07,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:30:07,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:29:58" (1/3) ... [2021-12-22 14:30:07,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e2c5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:30:07, skipping insertion in model container [2021-12-22 14:30:07,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:00" (2/3) ... [2021-12-22 14:30:07,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e2c5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:30:07, skipping insertion in model container [2021-12-22 14:30:07,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:30:07" (3/3) ... [2021-12-22 14:30:07,677 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2021-12-22 14:30:07,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:30:07,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:30:07,721 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:30:07,727 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:30:07,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:30:07,775 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) [2021-12-22 14:30:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 14:30:07,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:07,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:07,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1371765540, now seen corresponding path program 1 times [2021-12-22 14:30:07,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:07,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046504502] [2021-12-22 14:30:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:07,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:08,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046504502] [2021-12-22 14:30:08,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046504502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:08,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:08,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:30:08,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20587032] [2021-12-22 14:30:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:08,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:08,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:08,305 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) [2021-12-22 14:30:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:08,583 INFO L93 Difference]: Finished difference Result 3588 states and 5271 transitions. [2021-12-22 14:30:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:08,588 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 [2021-12-22 14:30:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:08,628 INFO L225 Difference]: With dead ends: 3588 [2021-12-22 14:30:08,628 INFO L226 Difference]: Without dead ends: 2366 [2021-12-22 14:30:08,644 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 [2021-12-22 14:30:08,649 INFO L933 BasicCegarLoop]: 2781 mSDtfsCounter, 1675 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:08,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1675 Valid, 4481 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-12-22 14:30:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2362. [2021-12-22 14:30:08,853 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) [2021-12-22 14:30:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3385 transitions. [2021-12-22 14:30:08,876 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3385 transitions. Word has length 16 [2021-12-22 14:30:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:08,877 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 3385 transitions. [2021-12-22 14:30:08,877 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) [2021-12-22 14:30:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3385 transitions. [2021-12-22 14:30:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 14:30:08,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:08,886 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] [2021-12-22 14:30:08,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:30:08,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash 24298474, now seen corresponding path program 1 times [2021-12-22 14:30:08,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008367110] [2021-12-22 14:30:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:08,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:09,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 14:30:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:09,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008367110] [2021-12-22 14:30:09,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008367110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:09,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:09,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:30:09,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246745950] [2021-12-22 14:30:09,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:09,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:30:09,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:30:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:30:09,119 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) [2021-12-22 14:30:17,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:21,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:26,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:28,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:30,961 INFO L93 Difference]: Finished difference Result 7329 states and 10668 transitions. [2021-12-22 14:30:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:30:30,961 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 [2021-12-22 14:30:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:30,995 INFO L225 Difference]: With dead ends: 7329 [2021-12-22 14:30:30,996 INFO L226 Difference]: Without dead ends: 4970 [2021-12-22 14:30:31,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:30:31,012 INFO L933 BasicCegarLoop]: 2018 mSDtfsCounter, 2987 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 6308 mSolverCounterSat, 2066 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3315 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 8377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2066 IncrementalHoareTripleChecker+Valid, 6308 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:31,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3315 Valid, 2743 Invalid, 8377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2066 Valid, 6308 Invalid, 3 Unknown, 0 Unchecked, 21.4s Time] [2021-12-22 14:30:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-12-22 14:30:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4674. [2021-12-22 14:30:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 3226 states have (on average 1.3592684438933664) internal successors, (4385), 3394 states have internal predecessors, (4385), 1163 states have call successors, (1163), 282 states have call predecessors, (1163), 284 states have return successors, (1164), 1129 states have call predecessors, (1164), 1153 states have call successors, (1164) [2021-12-22 14:30:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 6712 transitions. [2021-12-22 14:30:31,304 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 6712 transitions. Word has length 23 [2021-12-22 14:30:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:31,305 INFO L470 AbstractCegarLoop]: Abstraction has 4674 states and 6712 transitions. [2021-12-22 14:30:31,305 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) [2021-12-22 14:30:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 6712 transitions. [2021-12-22 14:30:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 14:30:31,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:31,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:31,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:30:31,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -46651610, now seen corresponding path program 1 times [2021-12-22 14:30:31,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:31,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271375124] [2021-12-22 14:30:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:31,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 14:30:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:31,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:31,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271375124] [2021-12-22 14:30:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271375124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:31,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:31,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:30:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023011006] [2021-12-22 14:30:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:31,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:30:31,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:30:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:31,475 INFO L87 Difference]: Start difference. First operand 4674 states and 6712 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:38,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:39,854 INFO L93 Difference]: Finished difference Result 8405 states and 12180 transitions. [2021-12-22 14:30:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:30:39,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 14:30:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:39,875 INFO L225 Difference]: With dead ends: 8405 [2021-12-22 14:30:39,875 INFO L226 Difference]: Without dead ends: 3734 [2021-12-22 14:30:39,894 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 [2021-12-22 14:30:39,896 INFO L933 BasicCegarLoop]: 1726 mSDtfsCounter, 2092 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 605 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:39,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2275 Valid, 3336 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1579 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-12-22 14:30:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-12-22 14:30:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3524. [2021-12-22 14:30:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 2432 states have (on average 1.358141447368421) internal successors, (3303), 2560 states have internal predecessors, (3303), 877 states have call successors, (877), 213 states have call predecessors, (877), 214 states have return successors, (874), 849 states have call predecessors, (874), 867 states have call successors, (874) [2021-12-22 14:30:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 5054 transitions. [2021-12-22 14:30:40,055 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 5054 transitions. Word has length 25 [2021-12-22 14:30:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:40,056 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 5054 transitions. [2021-12-22 14:30:40,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 5054 transitions. [2021-12-22 14:30:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 14:30:40,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:40,059 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] [2021-12-22 14:30:40,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:30:40,060 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:40,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1054871817, now seen corresponding path program 1 times [2021-12-22 14:30:40,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:40,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836886756] [2021-12-22 14:30:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:40,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:40,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 14:30:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 14:30:40,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836886756] [2021-12-22 14:30:40,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836886756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:40,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:40,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:30:40,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743536764] [2021-12-22 14:30:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:40,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:30:40,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:40,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:30:40,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:30:40,222 INFO L87 Difference]: Start difference. First operand 3524 states and 5054 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) [2021-12-22 14:30:46,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:46,430 INFO L93 Difference]: Finished difference Result 3756 states and 5481 transitions. [2021-12-22 14:30:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:30:46,430 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 [2021-12-22 14:30:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:46,449 INFO L225 Difference]: With dead ends: 3756 [2021-12-22 14:30:46,449 INFO L226 Difference]: Without dead ends: 3752 [2021-12-22 14:30:46,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:46,452 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 1832 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 562 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:46,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 1808 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 1058 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-12-22 14:30:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-12-22 14:30:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3540. [2021-12-22 14:30:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 2444 states have (on average 1.354746317512275) internal successors, (3311), 2570 states have internal predecessors, (3311), 875 states have call successors, (875), 219 states have call predecessors, (875), 220 states have return successors, (874), 849 states have call predecessors, (874), 867 states have call successors, (874) [2021-12-22 14:30:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 5060 transitions. [2021-12-22 14:30:46,606 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 5060 transitions. Word has length 35 [2021-12-22 14:30:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:46,606 INFO L470 AbstractCegarLoop]: Abstraction has 3540 states and 5060 transitions. [2021-12-22 14:30:46,607 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) [2021-12-22 14:30:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 5060 transitions. [2021-12-22 14:30:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 14:30:46,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:46,608 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] [2021-12-22 14:30:46,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:30:46,609 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:46,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1659366227, now seen corresponding path program 1 times [2021-12-22 14:30:46,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:46,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160371275] [2021-12-22 14:30:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:46,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 14:30:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 14:30:46,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160371275] [2021-12-22 14:30:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160371275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:46,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:46,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:30:46,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539690340] [2021-12-22 14:30:46,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:46,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:30:46,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:30:46,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:30:46,803 INFO L87 Difference]: Start difference. First operand 3540 states and 5060 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) [2021-12-22 14:30:51,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:54,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:54,814 INFO L93 Difference]: Finished difference Result 3752 states and 5474 transitions. [2021-12-22 14:30:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:30:54,815 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 [2021-12-22 14:30:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:54,834 INFO L225 Difference]: With dead ends: 3752 [2021-12-22 14:30:54,834 INFO L226 Difference]: Without dead ends: 3749 [2021-12-22 14:30:54,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:54,837 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 1848 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 537 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:54,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2036 Valid, 1784 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 1044 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2021-12-22 14:30:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-12-22 14:30:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3539. [2021-12-22 14:30:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 2444 states have (on average 1.3543371522094927) internal successors, (3310), 2569 states have internal predecessors, (3310), 874 states have call successors, (874), 219 states have call predecessors, (874), 220 states have return successors, (874), 849 states have call predecessors, (874), 867 states have call successors, (874) [2021-12-22 14:30:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 5058 transitions. [2021-12-22 14:30:55,030 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 5058 transitions. Word has length 36 [2021-12-22 14:30:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:55,031 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 5058 transitions. [2021-12-22 14:30:55,032 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) [2021-12-22 14:30:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 5058 transitions. [2021-12-22 14:30:55,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 14:30:55,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:55,035 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] [2021-12-22 14:30:55,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:30:55,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:55,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:55,037 INFO L85 PathProgramCache]: Analyzing trace with hash 98605196, now seen corresponding path program 1 times [2021-12-22 14:30:55,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:55,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530989892] [2021-12-22 14:30:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:55,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 14:30:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 14:30:55,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530989892] [2021-12-22 14:30:55,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530989892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:55,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:55,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:30:55,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545114729] [2021-12-22 14:30:55,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:55,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:30:55,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:55,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:30:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:30:55,164 INFO L87 Difference]: Start difference. First operand 3539 states and 5058 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)