./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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--hwmon--amc6821.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 b4ab5f9a609d808b1cc730f70e246b6cee2b77e8055db2b71a14eb45eb69a8df --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:35:57,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:35:57,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:35:57,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:35:57,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:35:57,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:35:57,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:35:57,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:35:57,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:35:57,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:35:57,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:35:57,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:35:57,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:35:57,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:35:57,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:35:57,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:35:57,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:35:57,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:35:57,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:35:57,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:35:57,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:35:57,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:35:57,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:35:57,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:35:57,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:35:57,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:35:57,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:35:57,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:35:57,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:35:57,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:35:57,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:35:57,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:35:57,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:35:57,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:35:57,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:35:57,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:35:57,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:35:57,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:35:57,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:35:57,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:35:57,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:35:57,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:35:57,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:35:57,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:35:57,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:35:57,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:35:57,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:35:57,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:35:57,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:35:57,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:35:57,626 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:35:57,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:35:57,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:35:57,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:35:57,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:35:57,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:35:57,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:35:57,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:35:57,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:35:57,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:35:57,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:35:57,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:35:57,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:35:57,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:35:57,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:35:57,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:35:57,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:35:57,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:35:57,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:35:57,629 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:35:57,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:35:57,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:35:57,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:35:57,630 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4ab5f9a609d808b1cc730f70e246b6cee2b77e8055db2b71a14eb45eb69a8df [2021-12-14 17:35:57,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:35:57,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:35:57,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:35:57,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:35:57,856 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:35:57,857 INFO L432 ainManager$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--hwmon--amc6821.ko-main.cil.out.i [2021-12-14 17:35:57,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8997e70dc/a11e90533ed54d9d8d802835cb385bc1/FLAGdbfcc4db2 [2021-12-14 17:35:58,376 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:35:58,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i [2021-12-14 17:35:58,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8997e70dc/a11e90533ed54d9d8d802835cb385bc1/FLAGdbfcc4db2 [2021-12-14 17:35:58,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8997e70dc/a11e90533ed54d9d8d802835cb385bc1 [2021-12-14 17:35:58,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:35:58,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:35:58,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:35:58,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:35:58,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:35:58,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:35:58" (1/1) ... [2021-12-14 17:35:58,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@797cb1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:58, skipping insertion in model container [2021-12-14 17:35:58,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:35:58" (1/1) ... [2021-12-14 17:35:58,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:35:58,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:35:59,658 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--hwmon--amc6821.ko-main.cil.out.i[139464,139477] [2021-12-14 17:35:59,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:35:59,751 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:35:59,894 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--hwmon--amc6821.ko-main.cil.out.i[139464,139477] [2021-12-14 17:35:59,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:35:59,992 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:35:59,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59 WrapperNode [2021-12-14 17:35:59,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:35:59,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:35:59,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:35:59,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:36:00,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,167 INFO L137 Inliner]: procedures = 138, calls = 1364, calls flagged for inlining = 60, calls inlined = 52, statements flattened = 3523 [2021-12-14 17:36:00,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:36:00,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:36:00,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:36:00,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:36:00,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:36:00,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:36:00,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:36:00,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:36:00,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (1/1) ... [2021-12-14 17:36:00,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:36:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:36:00,350 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) [2021-12-14 17:36:00,412 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 [2021-12-14 17:36:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure get_pwm1_auto_point_pwm [2021-12-14 17:36:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure get_pwm1_auto_point_pwm [2021-12-14 17:36:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:36:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure get_fan [2021-12-14 17:36:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure get_fan [2021-12-14 17:36:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2021-12-14 17:36:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2021-12-14 17:36:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-12-14 17:36:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-12-14 17:36:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure amc6821_detect [2021-12-14 17:36:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure amc6821_detect [2021-12-14 17:36:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:36:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:36:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:36:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-14 17:36:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-14 17:36:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:36:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:36:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:36:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:36:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:36:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_amc6821_data [2021-12-14 17:36:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_amc6821_data [2021-12-14 17:36:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-14 17:36:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-14 17:36:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure get_temp_auto_point_temp [2021-12-14 17:36:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure get_temp_auto_point_temp [2021-12-14 17:36:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure set_slope_register [2021-12-14 17:36:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure set_slope_register [2021-12-14 17:36:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure get_temp_alarm [2021-12-14 17:36:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure get_temp_alarm [2021-12-14 17:36:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:36:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:36:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:36:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure SENSORS_LIMIT [2021-12-14 17:36:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure SENSORS_LIMIT [2021-12-14 17:36:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2021-12-14 17:36:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2021-12-14 17:36:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:36:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure amc6821_update_device [2021-12-14 17:36:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure amc6821_update_device [2021-12-14 17:36:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtol [2021-12-14 17:36:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtol [2021-12-14 17:36:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:36:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:36:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure get_temp [2021-12-14 17:36:00,447 INFO L138 BoogieDeclarations]: Found implementation of procedure get_temp [2021-12-14 17:36:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp [2021-12-14 17:36:00,447 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp [2021-12-14 17:36:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure set_fan [2021-12-14 17:36:00,448 INFO L138 BoogieDeclarations]: Found implementation of procedure set_fan [2021-12-14 17:36:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:36:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2021-12-14 17:36:00,448 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2021-12-14 17:36:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_amc6821_data [2021-12-14 17:36:00,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_amc6821_data [2021-12-14 17:36:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:36:00,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:36:00,449 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp_auto_point_temp [2021-12-14 17:36:00,449 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp_auto_point_temp [2021-12-14 17:36:00,449 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-14 17:36:00,449 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-14 17:36:00,834 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:36:00,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:36:02,665 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:36:02,676 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:36:02,676 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:36:02,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:36:02 BoogieIcfgContainer [2021-12-14 17:36:02,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:36:02,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:36:02,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:36:02,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:36:02,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:35:58" (1/3) ... [2021-12-14 17:36:02,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e01c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:36:02, skipping insertion in model container [2021-12-14 17:36:02,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:35:59" (2/3) ... [2021-12-14 17:36:02,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e01c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:36:02, skipping insertion in model container [2021-12-14 17:36:02,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:36:02" (3/3) ... [2021-12-14 17:36:02,686 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i [2021-12-14 17:36:02,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:36:02,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:36:02,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:36:02,734 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 [2021-12-14 17:36:02,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:36:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 816 states, 619 states have (on average 1.505654281098546) internal successors, (932), 626 states have internal predecessors, (932), 170 states have call successors, (170), 25 states have call predecessors, (170), 25 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2021-12-14 17:36:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 17:36:02,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:02,771 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, 1, 1, 1, 1] [2021-12-14 17:36:02,772 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 562547104, now seen corresponding path program 1 times [2021-12-14 17:36:02,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:02,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332146206] [2021-12-14 17:36:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:02,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:03,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:36:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:03,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:03,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332146206] [2021-12-14 17:36:03,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332146206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:03,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:03,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:03,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928397096] [2021-12-14 17:36:03,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:03,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:03,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:03,323 INFO L87 Difference]: Start difference. First operand has 816 states, 619 states have (on average 1.505654281098546) internal successors, (932), 626 states have internal predecessors, (932), 170 states have call successors, (170), 25 states have call predecessors, (170), 25 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:04,546 INFO L93 Difference]: Finished difference Result 2562 states and 4203 transitions. [2021-12-14 17:36:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:04,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-14 17:36:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:04,565 INFO L225 Difference]: With dead ends: 2562 [2021-12-14 17:36:04,565 INFO L226 Difference]: Without dead ends: 1741 [2021-12-14 17:36:04,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:04,578 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1343 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:04,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3787 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:36:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-12-14 17:36:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1594. [2021-12-14 17:36:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1212 states have (on average 1.504950495049505) internal successors, (1824), 1217 states have internal predecessors, (1824), 333 states have call successors, (333), 49 states have call predecessors, (333), 48 states have return successors, (327), 327 states have call predecessors, (327), 327 states have call successors, (327) [2021-12-14 17:36:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2484 transitions. [2021-12-14 17:36:04,677 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2484 transitions. Word has length 29 [2021-12-14 17:36:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:04,677 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2484 transitions. [2021-12-14 17:36:04,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2484 transitions. [2021-12-14 17:36:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 17:36:04,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:04,680 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, 1, 1, 1, 1, 1] [2021-12-14 17:36:04,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:36:04,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1256835525, now seen corresponding path program 1 times [2021-12-14 17:36:04,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:04,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568031605] [2021-12-14 17:36:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:04,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:36:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:04,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:04,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568031605] [2021-12-14 17:36:04,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568031605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:04,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:04,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:04,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467878812] [2021-12-14 17:36:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:04,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:04,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:04,799 INFO L87 Difference]: Start difference. First operand 1594 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:06,011 INFO L93 Difference]: Finished difference Result 5026 states and 7920 transitions. [2021-12-14 17:36:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-12-14 17:36:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:06,032 INFO L225 Difference]: With dead ends: 5026 [2021-12-14 17:36:06,033 INFO L226 Difference]: Without dead ends: 3435 [2021-12-14 17:36:06,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:06,042 INFO L933 BasicCegarLoop]: 1550 mSDtfsCounter, 1340 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:06,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3800 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:36:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-12-14 17:36:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3156. [2021-12-14 17:36:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 2401 states have (on average 1.5052061640982923) internal successors, (3614), 2406 states have internal predecessors, (3614), 658 states have call successors, (658), 97 states have call predecessors, (658), 96 states have return successors, (652), 652 states have call predecessors, (652), 652 states have call successors, (652) [2021-12-14 17:36:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 4924 transitions. [2021-12-14 17:36:06,181 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 4924 transitions. Word has length 30 [2021-12-14 17:36:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 4924 transitions. [2021-12-14 17:36:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 4924 transitions. [2021-12-14 17:36:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 17:36:06,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:06,184 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:06,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:36:06,185 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1258897429, now seen corresponding path program 1 times [2021-12-14 17:36:06,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:06,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614981880] [2021-12-14 17:36:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:06,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:06,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:36:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:06,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:06,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:06,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614981880] [2021-12-14 17:36:06,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614981880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:06,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:06,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:06,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393635432] [2021-12-14 17:36:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:06,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:06,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:06,310 INFO L87 Difference]: Start difference. First operand 3156 states and 4924 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:07,396 INFO L93 Difference]: Finished difference Result 9966 states and 15718 transitions. [2021-12-14 17:36:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-14 17:36:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:07,429 INFO L225 Difference]: With dead ends: 9966 [2021-12-14 17:36:07,430 INFO L226 Difference]: Without dead ends: 6813 [2021-12-14 17:36:07,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:07,444 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 1340 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3822 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:07,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3822 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:36:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6813 states. [2021-12-14 17:36:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6813 to 6270. [2021-12-14 17:36:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 4771 states have (on average 1.5045063927897715) internal successors, (7178), 4776 states have internal predecessors, (7178), 1306 states have call successors, (1306), 193 states have call predecessors, (1306), 192 states have return successors, (1300), 1300 states have call predecessors, (1300), 1300 states have call successors, (1300) [2021-12-14 17:36:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 9784 transitions. [2021-12-14 17:36:07,693 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 9784 transitions. Word has length 33 [2021-12-14 17:36:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:07,694 INFO L470 AbstractCegarLoop]: Abstraction has 6270 states and 9784 transitions. [2021-12-14 17:36:07,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 9784 transitions. [2021-12-14 17:36:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 17:36:07,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:07,695 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, 1, 1, 1, 1, 1] [2021-12-14 17:36:07,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:36:07,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1575112406, now seen corresponding path program 1 times [2021-12-14 17:36:07,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:07,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697834891] [2021-12-14 17:36:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:07,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:07,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:36:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:07,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697834891] [2021-12-14 17:36:07,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697834891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:07,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:07,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:07,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086918212] [2021-12-14 17:36:07,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:07,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:07,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:07,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:07,812 INFO L87 Difference]: Start difference. First operand 6270 states and 9784 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:08,985 INFO L93 Difference]: Finished difference Result 19812 states and 31242 transitions. [2021-12-14 17:36:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:08,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-12-14 17:36:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:09,054 INFO L225 Difference]: With dead ends: 19812 [2021-12-14 17:36:09,055 INFO L226 Difference]: Without dead ends: 13545 [2021-12-14 17:36:09,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:09,078 INFO L933 BasicCegarLoop]: 1608 mSDtfsCounter, 1343 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3907 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:09,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3907 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:36:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13545 states. [2021-12-14 17:36:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13545 to 12474. [2021-12-14 17:36:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12474 states, 9491 states have (on average 1.5035296596775893) internal successors, (14270), 9496 states have internal predecessors, (14270), 2598 states have call successors, (2598), 385 states have call predecessors, (2598), 384 states have return successors, (2592), 2592 states have call predecessors, (2592), 2592 states have call successors, (2592) [2021-12-14 17:36:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12474 states to 12474 states and 19460 transitions. [2021-12-14 17:36:09,519 INFO L78 Accepts]: Start accepts. Automaton has 12474 states and 19460 transitions. Word has length 30 [2021-12-14 17:36:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:09,519 INFO L470 AbstractCegarLoop]: Abstraction has 12474 states and 19460 transitions. [2021-12-14 17:36:09,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 12474 states and 19460 transitions. [2021-12-14 17:36:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 17:36:09,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:09,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:09,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:36:09,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash 701010116, now seen corresponding path program 1 times [2021-12-14 17:36:09,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989340460] [2021-12-14 17:36:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:36:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:09,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:09,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989340460] [2021-12-14 17:36:09,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989340460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:09,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:09,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:09,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119648220] [2021-12-14 17:36:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:09,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:09,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:09,683 INFO L87 Difference]: Start difference. First operand 12474 states and 19460 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:11,196 INFO L93 Difference]: Finished difference Result 39368 states and 62038 transitions. [2021-12-14 17:36:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:11,197 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-14 17:36:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:11,328 INFO L225 Difference]: With dead ends: 39368 [2021-12-14 17:36:11,329 INFO L226 Difference]: Without dead ends: 26897 [2021-12-14 17:36:11,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:11,481 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1328 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:11,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1445 Valid, 3921 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:36:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26897 states. [2021-12-14 17:36:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26897 to 24770. [2021-12-14 17:36:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24770 states, 18843 states have (on average 1.5019901289603566) internal successors, (28302), 18848 states have internal predecessors, (28302), 5158 states have call successors, (5158), 769 states have call predecessors, (5158), 768 states have return successors, (5152), 5152 states have call predecessors, (5152), 5152 states have call successors, (5152) [2021-12-14 17:36:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24770 states to 24770 states and 38612 transitions. [2021-12-14 17:36:12,255 INFO L78 Accepts]: Start accepts. Automaton has 24770 states and 38612 transitions. Word has length 39 [2021-12-14 17:36:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:12,255 INFO L470 AbstractCegarLoop]: Abstraction has 24770 states and 38612 transitions. [2021-12-14 17:36:12,256 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24770 states and 38612 transitions. [2021-12-14 17:36:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 17:36:12,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:12,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:12,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:36:12,259 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -176446361, now seen corresponding path program 1 times [2021-12-14 17:36:12,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297063241] [2021-12-14 17:36:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:12,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:12,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:36:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:12,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:12,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297063241] [2021-12-14 17:36:12,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297063241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:12,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:12,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:12,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119349511] [2021-12-14 17:36:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:12,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:12,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:12,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:12,408 INFO L87 Difference]: Start difference. First operand 24770 states and 38612 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:14,533 INFO L93 Difference]: Finished difference Result 78208 states and 123158 transitions. [2021-12-14 17:36:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:14,533 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-14 17:36:14,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:14,794 INFO L225 Difference]: With dead ends: 78208 [2021-12-14 17:36:14,794 INFO L226 Difference]: Without dead ends: 53441 [2021-12-14 17:36:14,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:14,871 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 1331 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 3952 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:14,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 3952 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 17:36:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53441 states. [2021-12-14 17:36:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53441 to 49202. [2021-12-14 17:36:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49202 states, 37419 states have (on average 1.5003607792832518) internal successors, (56142), 37424 states have internal predecessors, (56142), 10246 states have call successors, (10246), 1537 states have call predecessors, (10246), 1536 states have return successors, (10240), 10240 states have call predecessors, (10240), 10240 states have call successors, (10240) [2021-12-14 17:36:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49202 states to 49202 states and 76628 transitions. [2021-12-14 17:36:16,300 INFO L78 Accepts]: Start accepts. Automaton has 49202 states and 76628 transitions. Word has length 35 [2021-12-14 17:36:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:16,302 INFO L470 AbstractCegarLoop]: Abstraction has 49202 states and 76628 transitions. [2021-12-14 17:36:16,302 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 49202 states and 76628 transitions. [2021-12-14 17:36:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 17:36:16,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:16,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:36:16,304 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash -947297063, now seen corresponding path program 1 times [2021-12-14 17:36:16,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:16,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103008491] [2021-12-14 17:36:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:16,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:36:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:16,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:16,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103008491] [2021-12-14 17:36:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103008491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:16,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:16,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:16,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003322544] [2021-12-14 17:36:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:16,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:16,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:16,411 INFO L87 Difference]: Start difference. First operand 49202 states and 76628 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:19,913 INFO L93 Difference]: Finished difference Result 155408 states and 244534 transitions. [2021-12-14 17:36:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:19,931 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-14 17:36:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:20,640 INFO L225 Difference]: With dead ends: 155408 [2021-12-14 17:36:20,640 INFO L226 Difference]: Without dead ends: 106209 [2021-12-14 17:36:20,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:20,767 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 1330 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 3982 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:20,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 3982 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 17:36:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106209 states. [2021-12-14 17:36:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106209 to 97746. [2021-12-14 17:36:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97746 states, 74315 states have (on average 1.4986745609903789) internal successors, (111374), 74320 states have internal predecessors, (111374), 20358 states have call successors, (20358), 3073 states have call predecessors, (20358), 3072 states have return successors, (20352), 20352 states have call predecessors, (20352), 20352 states have call successors, (20352) [2021-12-14 17:36:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97746 states to 97746 states and 152084 transitions. [2021-12-14 17:36:24,047 INFO L78 Accepts]: Start accepts. Automaton has 97746 states and 152084 transitions. Word has length 36 [2021-12-14 17:36:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:24,047 INFO L470 AbstractCegarLoop]: Abstraction has 97746 states and 152084 transitions. [2021-12-14 17:36:24,047 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 97746 states and 152084 transitions. [2021-12-14 17:36:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 17:36:24,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:24,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:24,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:36:24,049 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1388157961, now seen corresponding path program 1 times [2021-12-14 17:36:24,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:24,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688750120] [2021-12-14 17:36:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:24,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 17:36:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:24,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688750120] [2021-12-14 17:36:24,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688750120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:24,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:24,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:24,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872834547] [2021-12-14 17:36:24,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:24,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:24,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:24,172 INFO L87 Difference]: Start difference. First operand 97746 states and 152084 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:29,697 INFO L93 Difference]: Finished difference Result 309360 states and 486326 transitions. [2021-12-14 17:36:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2021-12-14 17:36:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:31,161 INFO L225 Difference]: With dead ends: 309360 [2021-12-14 17:36:31,161 INFO L226 Difference]: Without dead ends: 211617 [2021-12-14 17:36:31,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:31,487 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 1339 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 4016 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:31,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 4016 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:36:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211617 states. [2021-12-14 17:36:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211617 to 194706. [2021-12-14 17:36:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194706 states, 147979 states have (on average 1.49738814291217) internal successors, (221582), 147984 states have internal predecessors, (221582), 40582 states have call successors, (40582), 6145 states have call predecessors, (40582), 6144 states have return successors, (40576), 40576 states have call predecessors, (40576), 40576 states have call successors, (40576) [2021-12-14 17:36:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194706 states to 194706 states and 302740 transitions. [2021-12-14 17:36:38,374 INFO L78 Accepts]: Start accepts. Automaton has 194706 states and 302740 transitions. Word has length 34 [2021-12-14 17:36:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:38,374 INFO L470 AbstractCegarLoop]: Abstraction has 194706 states and 302740 transitions. [2021-12-14 17:36:38,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 194706 states and 302740 transitions. [2021-12-14 17:36:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 17:36:38,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:38,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:38,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:36:38,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1220342292, now seen corresponding path program 1 times [2021-12-14 17:36:38,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:38,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19868388] [2021-12-14 17:36:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:38,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:38,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:36:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:38,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:36:38,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19868388] [2021-12-14 17:36:38,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19868388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:38,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:38,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:38,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646844120] [2021-12-14 17:36:38,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:38,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:38,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:38,533 INFO L87 Difference]: Start difference. First operand 194706 states and 302740 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 17:36:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:49,378 INFO L93 Difference]: Finished difference Result 616368 states and 968118 transitions. [2021-12-14 17:36:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:49,378 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-14 17:36:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:51,643 INFO L225 Difference]: With dead ends: 616368 [2021-12-14 17:36:51,644 INFO L226 Difference]: Without dead ends: 421665 [2021-12-14 17:36:52,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:36:52,756 INFO L933 BasicCegarLoop]: 1676 mSDtfsCounter, 1332 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 4035 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:52,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 4035 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:36:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421665 states.