./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--max16065.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--max16065.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 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:36:10,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:36:10,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:36:10,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:36:10,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:36:10,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:36:10,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:36:10,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:36:10,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:36:10,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:36:10,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:36:10,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:36:10,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:36:10,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:36:10,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:36:10,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:36:10,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:36:10,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:36:10,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:36:10,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:36:10,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:36:10,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:36:10,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:36:10,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:36:10,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:36:10,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:36:10,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:36:10,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:36:10,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:36:10,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:36:10,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:36:10,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:36:10,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:36:10,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:36:10,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:36:10,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:36:10,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:36:10,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:36:10,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:36:10,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:36:10,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:36:10,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:36:10,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:36:10,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:36:10,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:36:10,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:36:10,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:36:10,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:36:10,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:36:10,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:36:10,240 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:36:10,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:36:10,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:36:10,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:36:10,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:36:10,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:36:10,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:36:10,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:36:10,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:36:10,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:36:10,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:36:10,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:36:10,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:36:10,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:36:10,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:36:10,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:36:10,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:36:10,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:36:10,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:36:10,243 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:36:10,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:36:10,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:36:10,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:36:10,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 [2021-12-14 17:36:10,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:36:10,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:36:10,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:36:10,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:36:10,422 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:36:10,423 INFO L432 ainManager$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--max16065.ko-main.cil.out.i [2021-12-14 17:36:10,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318fcdc33/8a3345595b5a49509d8fbf97e7ea49da/FLAG5ad2b7ff3 [2021-12-14 17:36:10,978 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:36:10,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2021-12-14 17:36:11,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318fcdc33/8a3345595b5a49509d8fbf97e7ea49da/FLAG5ad2b7ff3 [2021-12-14 17:36:11,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318fcdc33/8a3345595b5a49509d8fbf97e7ea49da [2021-12-14 17:36:11,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:36:11,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:36:11,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:36:11,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:36:11,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:36:11,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:36:11" (1/1) ... [2021-12-14 17:36:11,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7d768d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:11, skipping insertion in model container [2021-12-14 17:36:11,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:36:11" (1/1) ... [2021-12-14 17:36:11,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:36:11,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:36:12,108 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--max16065.ko-main.cil.out.i[168201,168214] [2021-12-14 17:36:12,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:36:12,219 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:36:12,370 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--max16065.ko-main.cil.out.i[168201,168214] [2021-12-14 17:36:12,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:36:12,541 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:36:12,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12 WrapperNode [2021-12-14 17:36:12,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:36:12,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:36:12,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:36:12,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:36:12,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,736 INFO L137 Inliner]: procedures = 115, calls = 2009, calls flagged for inlining = 45, calls inlined = 37, statements flattened = 5217 [2021-12-14 17:36:12,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:36:12,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:36:12,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:36:12,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:36:12,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:36:12,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:36:12,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:36:12,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:36:12,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (1/1) ... [2021-12-14 17:36:12,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:36:12,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:36:12,945 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 17:36:12,948 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 17:36:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_set_limit [2021-12-14 17:36:12,972 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_set_limit [2021-12-14 17:36:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:36:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2021-12-14 17:36:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2021-12-14 17:36:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-12-14 17:36:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-12-14 17:36:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_limit [2021-12-14 17:36:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_limit [2021-12-14 17:36:12,973 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_update_device [2021-12-14 17:36:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_update_device [2021-12-14 17:36:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_input [2021-12-14 17:36:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_input [2021-12-14 17:36:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_read_adc [2021-12-14 17:36:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_read_adc [2021-12-14 17:36:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:36:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:36:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_max16065_data [2021-12-14 17:36:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_max16065_data [2021-12-14 17:36:12,974 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_alarm [2021-12-14 17:36:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_alarm [2021-12-14 17:36:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure LIMIT_TO_MV [2021-12-14 17:36:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure LIMIT_TO_MV [2021-12-14 17:36:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:36:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-14 17:36:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-14 17:36:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:36:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:36:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:36:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:36:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:36:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-14 17:36:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-14 17:36:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:36:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:36:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:36:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2021-12-14 17:36:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2021-12-14 17:36:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2021-12-14 17:36:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2021-12-14 17:36:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:36:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:36:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:36:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_cleanup [2021-12-14 17:36:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_cleanup [2021-12-14 17:36:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:36:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2021-12-14 17:36:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2021-12-14 17:36:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:36:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:36:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2021-12-14 17:36:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2021-12-14 17:36:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-14 17:36:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-14 17:36:13,421 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:36:13,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:36:16,992 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:36:17,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:36:17,002 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:36:17,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:36:17 BoogieIcfgContainer [2021-12-14 17:36:17,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:36:17,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:36:17,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:36:17,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:36:17,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:36:11" (1/3) ... [2021-12-14 17:36:17,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9d329d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:36:17, skipping insertion in model container [2021-12-14 17:36:17,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:36:12" (2/3) ... [2021-12-14 17:36:17,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9d329d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:36:17, skipping insertion in model container [2021-12-14 17:36:17,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:36:17" (3/3) ... [2021-12-14 17:36:17,011 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2021-12-14 17:36:17,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:36:17,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:36:17,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:36:17,054 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 17:36:17,054 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:36:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 1096 states, 891 states have (on average 1.6038159371492704) internal successors, (1429), 898 states have internal predecessors, (1429), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2021-12-14 17:36:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 17:36:17,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:17,085 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 17:36:17,085 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash 497892406, now seen corresponding path program 1 times [2021-12-14 17:36:17,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:17,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374765140] [2021-12-14 17:36:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:17,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:17,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:36:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:17,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:17,612 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 17:36:17,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:17,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374765140] [2021-12-14 17:36:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374765140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:17,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:17,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:17,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104075046] [2021-12-14 17:36:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:17,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:17,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:17,667 INFO L87 Difference]: Start difference. First operand has 1096 states, 891 states have (on average 1.6038159371492704) internal successors, (1429), 898 states have internal predecessors, (1429), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) 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 17:36:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:18,872 INFO L93 Difference]: Finished difference Result 3376 states and 5931 transitions. [2021-12-14 17:36:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:18,875 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 17:36:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:18,896 INFO L225 Difference]: With dead ends: 3376 [2021-12-14 17:36:18,896 INFO L226 Difference]: Without dead ends: 2275 [2021-12-14 17:36:18,911 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 17:36:18,914 INFO L933 BasicCegarLoop]: 2017 mSDtfsCounter, 1903 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2009 SdHoareTripleChecker+Valid, 5255 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:18,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2009 Valid, 5255 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:36:18,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-12-14 17:36:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 2156. [2021-12-14 17:36:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1758 states have (on average 1.6046643913538112) internal successors, (2821), 1763 states have internal predecessors, (2821), 357 states have call successors, (357), 41 states have call predecessors, (357), 40 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-14 17:36:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3529 transitions. [2021-12-14 17:36:19,044 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3529 transitions. Word has length 33 [2021-12-14 17:36:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:19,044 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3529 transitions. [2021-12-14 17:36:19,044 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 17:36:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3529 transitions. [2021-12-14 17:36:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 17:36:19,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:19,047 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 17:36:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:36:19,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1011938999, now seen corresponding path program 1 times [2021-12-14 17:36:19,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:19,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670919959] [2021-12-14 17:36:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:19,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:19,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 17:36:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:19,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:19,293 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 17:36:19,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:19,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670919959] [2021-12-14 17:36:19,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670919959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:19,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:19,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:19,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293462988] [2021-12-14 17:36:19,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:19,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:19,296 INFO L87 Difference]: Start difference. First operand 2156 states and 3529 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 17:36:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:20,262 INFO L93 Difference]: Finished difference Result 6658 states and 11149 transitions. [2021-12-14 17:36:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:20,263 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 17:36:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:20,290 INFO L225 Difference]: With dead ends: 6658 [2021-12-14 17:36:20,291 INFO L226 Difference]: Without dead ends: 4505 [2021-12-14 17:36:20,298 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 17:36:20,299 INFO L933 BasicCegarLoop]: 2075 mSDtfsCounter, 1908 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:20,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1990 Valid, 5436 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:36:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2021-12-14 17:36:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4282. [2021-12-14 17:36:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 3495 states have (on average 1.6051502145922747) internal successors, (5610), 3500 states have internal predecessors, (5610), 706 states have call successors, (706), 81 states have call predecessors, (706), 80 states have return successors, (700), 700 states have call predecessors, (700), 700 states have call successors, (700) [2021-12-14 17:36:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 7016 transitions. [2021-12-14 17:36:20,458 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 7016 transitions. Word has length 34 [2021-12-14 17:36:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:20,458 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 7016 transitions. [2021-12-14 17:36:20,458 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 17:36:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 7016 transitions. [2021-12-14 17:36:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 17:36:20,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:20,461 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] [2021-12-14 17:36:20,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:36:20,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 762970933, now seen corresponding path program 1 times [2021-12-14 17:36:20,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:20,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066462120] [2021-12-14 17:36:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:20,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:20,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:36:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:20,687 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 17:36:20,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066462120] [2021-12-14 17:36:20,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066462120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:20,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:20,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:20,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896786227] [2021-12-14 17:36:20,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:20,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:20,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:20,690 INFO L87 Difference]: Start difference. First operand 4282 states and 7016 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (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 17:36:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:21,739 INFO L93 Difference]: Finished difference Result 13232 states and 22174 transitions. [2021-12-14 17:36:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:21,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (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 37 [2021-12-14 17:36:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:21,783 INFO L225 Difference]: With dead ends: 13232 [2021-12-14 17:36:21,783 INFO L226 Difference]: Without dead ends: 8953 [2021-12-14 17:36:21,797 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 17:36:21,798 INFO L933 BasicCegarLoop]: 1969 mSDtfsCounter, 1927 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 5194 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:21,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2058 Valid, 5194 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:36:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8953 states. [2021-12-14 17:36:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8953 to 8522. [2021-12-14 17:36:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8522 states, 6959 states have (on average 1.6051156775398765) internal successors, (11170), 6964 states have internal predecessors, (11170), 1402 states have call successors, (1402), 161 states have call predecessors, (1402), 160 states have return successors, (1396), 1396 states have call predecessors, (1396), 1396 states have call successors, (1396) [2021-12-14 17:36:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8522 states to 8522 states and 13968 transitions. [2021-12-14 17:36:22,058 INFO L78 Accepts]: Start accepts. Automaton has 8522 states and 13968 transitions. Word has length 37 [2021-12-14 17:36:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:22,058 INFO L470 AbstractCegarLoop]: Abstraction has 8522 states and 13968 transitions. [2021-12-14 17:36:22,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (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 17:36:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8522 states and 13968 transitions. [2021-12-14 17:36:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 17:36:22,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:22,061 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 17:36:22,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:36:22,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash -310797271, now seen corresponding path program 1 times [2021-12-14 17:36:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792008214] [2021-12-14 17:36:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:22,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:22,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:36:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:22,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:22,375 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 17:36:22,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:22,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792008214] [2021-12-14 17:36:22,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792008214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:22,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:22,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:22,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121756868] [2021-12-14 17:36:22,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:22,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:22,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:22,379 INFO L87 Difference]: Start difference. First operand 8522 states and 13968 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 17:36:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:23,398 INFO L93 Difference]: Finished difference Result 26344 states and 44154 transitions. [2021-12-14 17:36:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:23,399 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 17:36:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:23,481 INFO L225 Difference]: With dead ends: 26344 [2021-12-14 17:36:23,481 INFO L226 Difference]: Without dead ends: 17825 [2021-12-14 17:36:23,521 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 17:36:23,529 INFO L933 BasicCegarLoop]: 1986 mSDtfsCounter, 1916 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 5200 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:23,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2035 Valid, 5200 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:36:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17825 states. [2021-12-14 17:36:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17825 to 16978. [2021-12-14 17:36:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16978 states, 13867 states have (on average 1.6048171918944256) internal successors, (22254), 13872 states have internal predecessors, (22254), 2790 states have call successors, (2790), 321 states have call predecessors, (2790), 320 states have return successors, (2784), 2784 states have call predecessors, (2784), 2784 states have call successors, (2784) [2021-12-14 17:36:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16978 states to 16978 states and 27828 transitions. [2021-12-14 17:36:24,236 INFO L78 Accepts]: Start accepts. Automaton has 16978 states and 27828 transitions. Word has length 41 [2021-12-14 17:36:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:24,236 INFO L470 AbstractCegarLoop]: Abstraction has 16978 states and 27828 transitions. [2021-12-14 17:36:24,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (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 17:36:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16978 states and 27828 transitions. [2021-12-14 17:36:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 17:36:24,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:24,239 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, 1, 1, 1, 1, 1] [2021-12-14 17:36:24,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:36:24,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1087085416, now seen corresponding path program 1 times [2021-12-14 17:36:24,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:24,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153574301] [2021-12-14 17:36:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:24,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:36:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:36:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:24,502 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 17:36:24,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153574301] [2021-12-14 17:36:24,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153574301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:24,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:24,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:24,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660898390] [2021-12-14 17:36:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:24,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:24,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:24,504 INFO L87 Difference]: Start difference. First operand 16978 states and 27828 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:25,967 INFO L93 Difference]: Finished difference Result 52432 states and 87862 transitions. [2021-12-14 17:36:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-12-14 17:36:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:26,132 INFO L225 Difference]: With dead ends: 52432 [2021-12-14 17:36:26,132 INFO L226 Difference]: Without dead ends: 35457 [2021-12-14 17:36:26,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 17:36:26,198 INFO L933 BasicCegarLoop]: 1993 mSDtfsCounter, 1917 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 5214 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:26,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2036 Valid, 5214 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:36:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35457 states. [2021-12-14 17:36:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35457 to 33778. [2021-12-14 17:36:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33778 states, 27595 states have (on average 1.6042761369813372) internal successors, (44270), 27600 states have internal predecessors, (44270), 5542 states have call successors, (5542), 641 states have call predecessors, (5542), 640 states have return successors, (5536), 5536 states have call predecessors, (5536), 5536 states have call successors, (5536) [2021-12-14 17:36:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33778 states to 33778 states and 55348 transitions. [2021-12-14 17:36:27,405 INFO L78 Accepts]: Start accepts. Automaton has 33778 states and 55348 transitions. Word has length 46 [2021-12-14 17:36:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:27,407 INFO L470 AbstractCegarLoop]: Abstraction has 33778 states and 55348 transitions. [2021-12-14 17:36:27,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 33778 states and 55348 transitions. [2021-12-14 17:36:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 17:36:27,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:27,409 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 17:36:27,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:36:27,410 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash 82953336, now seen corresponding path program 1 times [2021-12-14 17:36:27,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:27,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840575157] [2021-12-14 17:36:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:27,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 17:36:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:36:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:27,633 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 17:36:27,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:27,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840575157] [2021-12-14 17:36:27,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840575157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:27,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:27,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:27,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231668137] [2021-12-14 17:36:27,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:27,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:27,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:27,636 INFO L87 Difference]: Start difference. First operand 33778 states and 55348 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:29,658 INFO L93 Difference]: Finished difference Result 104336 states and 174774 transitions. [2021-12-14 17:36:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-14 17:36:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:29,928 INFO L225 Difference]: With dead ends: 104336 [2021-12-14 17:36:29,929 INFO L226 Difference]: Without dead ends: 70561 [2021-12-14 17:36:30,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 17:36:30,021 INFO L933 BasicCegarLoop]: 2033 mSDtfsCounter, 1911 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2018 SdHoareTripleChecker+Valid, 5279 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:30,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2018 Valid, 5279 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:36:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70561 states. [2021-12-14 17:36:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70561 to 67218. [2021-12-14 17:36:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67218 states, 54923 states have (on average 1.6036633104528157) internal successors, (88078), 54928 states have internal predecessors, (88078), 11014 states have call successors, (11014), 1281 states have call predecessors, (11014), 1280 states have return successors, (11008), 11008 states have call predecessors, (11008), 11008 states have call successors, (11008) [2021-12-14 17:36:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67218 states to 67218 states and 110100 transitions. [2021-12-14 17:36:32,618 INFO L78 Accepts]: Start accepts. Automaton has 67218 states and 110100 transitions. Word has length 41 [2021-12-14 17:36:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:32,618 INFO L470 AbstractCegarLoop]: Abstraction has 67218 states and 110100 transitions. [2021-12-14 17:36:32,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 67218 states and 110100 transitions. [2021-12-14 17:36:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 17:36:32,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:32,635 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, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:32,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:36:32,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash -737447042, now seen corresponding path program 1 times [2021-12-14 17:36:32,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:32,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395896179] [2021-12-14 17:36:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:32,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 17:36:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:36:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:32,851 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 17:36:32,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395896179] [2021-12-14 17:36:32,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395896179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:32,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:32,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:32,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270719474] [2021-12-14 17:36:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:32,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:32,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:32,854 INFO L87 Difference]: Start difference. First operand 67218 states and 110100 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:35,931 INFO L93 Difference]: Finished difference Result 207664 states and 347702 transitions. [2021-12-14 17:36:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-14 17:36:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:36,591 INFO L225 Difference]: With dead ends: 207664 [2021-12-14 17:36:36,591 INFO L226 Difference]: Without dead ends: 140449 [2021-12-14 17:36:36,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 17:36:36,767 INFO L933 BasicCegarLoop]: 2121 mSDtfsCounter, 1900 mSDsluCounter, 3373 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 5494 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:36,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 5494 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:36:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140449 states. [2021-12-14 17:36:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140449 to 133778. [2021-12-14 17:36:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133778 states, 109323 states have (on average 1.6030112602105686) internal successors, (175246), 109328 states have internal predecessors, (175246), 21894 states have call successors, (21894), 2561 states have call predecessors, (21894), 2560 states have return successors, (21888), 21888 states have call predecessors, (21888), 21888 states have call successors, (21888) [2021-12-14 17:36:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133778 states to 133778 states and 219028 transitions. [2021-12-14 17:36:41,837 INFO L78 Accepts]: Start accepts. Automaton has 133778 states and 219028 transitions. Word has length 47 [2021-12-14 17:36:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 133778 states and 219028 transitions. [2021-12-14 17:36:41,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 133778 states and 219028 transitions. [2021-12-14 17:36:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 17:36:41,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:41,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:36:41,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:36:41,840 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 198593437, now seen corresponding path program 1 times [2021-12-14 17:36:41,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685632679] [2021-12-14 17:36:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:41,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:42,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:36:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:42,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:36:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:42,054 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 17:36:42,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685632679] [2021-12-14 17:36:42,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685632679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:42,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:42,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:42,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115829566] [2021-12-14 17:36:42,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:42,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:42,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:42,057 INFO L87 Difference]: Start difference. First operand 133778 states and 219028 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:36:47,554 INFO L93 Difference]: Finished difference Result 413360 states and 691766 transitions. [2021-12-14 17:36:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:36:47,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-12-14 17:36:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:36:48,795 INFO L225 Difference]: With dead ends: 413360 [2021-12-14 17:36:48,795 INFO L226 Difference]: Without dead ends: 279585 [2021-12-14 17:36:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 17:36:49,199 INFO L933 BasicCegarLoop]: 2147 mSDtfsCounter, 1896 mSDsluCounter, 3419 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:36:49,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1982 Valid, 5566 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:36:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279585 states. [2021-12-14 17:36:57,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279585 to 266258. [2021-12-14 17:36:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266258 states, 217611 states have (on average 1.6023362789564866) internal successors, (348686), 217616 states have internal predecessors, (348686), 43526 states have call successors, (43526), 5121 states have call predecessors, (43526), 5120 states have return successors, (43520), 43520 states have call predecessors, (43520), 43520 states have call successors, (43520) [2021-12-14 17:36:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266258 states to 266258 states and 435732 transitions. [2021-12-14 17:36:58,675 INFO L78 Accepts]: Start accepts. Automaton has 266258 states and 435732 transitions. Word has length 51 [2021-12-14 17:36:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:36:58,675 INFO L470 AbstractCegarLoop]: Abstraction has 266258 states and 435732 transitions. [2021-12-14 17:36:58,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 17:36:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 266258 states and 435732 transitions. [2021-12-14 17:36:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 17:36:58,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:36:58,677 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, 1] [2021-12-14 17:36:58,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:36:58,677 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:36:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:36:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash -843141897, now seen corresponding path program 1 times [2021-12-14 17:36:58,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:36:58,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079524334] [2021-12-14 17:36:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:36:58,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:36:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:58,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:36:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:58,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:36:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:58,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:36:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:36:58,872 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 17:36:58,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:36:58,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079524334] [2021-12-14 17:36:58,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079524334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:36:58,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:36:58,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:36:58,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130343656] [2021-12-14 17:36:58,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:36:58,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:36:58,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:36:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:36:58,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:36:58,875 INFO L87 Difference]: Start difference. First operand 266258 states and 435732 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), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)