./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b4ab5f9a609d808b1cc730f70e246b6cee2b77e8055db2b71a14eb45eb69a8df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 23:48:48,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 23:48:48,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 23:48:48,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 23:48:48,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 23:48:48,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 23:48:48,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 23:48:48,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 23:48:48,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 23:48:48,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 23:48:48,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 23:48:48,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 23:48:48,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 23:48:48,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 23:48:48,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 23:48:48,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 23:48:48,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 23:48:48,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 23:48:48,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 23:48:48,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 23:48:48,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 23:48:48,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 23:48:48,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 23:48:48,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 23:48:48,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 23:48:48,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 23:48:48,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 23:48:48,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 23:48:48,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 23:48:48,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 23:48:48,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 23:48:48,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 23:48:48,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 23:48:48,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 23:48:48,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 23:48:48,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 23:48:48,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 23:48:48,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 23:48:48,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 23:48:48,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 23:48:48,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 23:48:48,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 23:48:48,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 23:48:48,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 23:48:48,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 23:48:48,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 23:48:48,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 23:48:48,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 23:48:48,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 23:48:48,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 23:48:48,538 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 23:48:48,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 23:48:48,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 23:48:48,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 23:48:48,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 23:48:48,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 23:48:48,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 23:48:48,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 23:48:48,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 23:48:48,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 23:48:48,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 23:48:48,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 23:48:48,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 23:48:48,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 23:48:48,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 23:48:48,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 23:48:48,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 23:48:48,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4ab5f9a609d808b1cc730f70e246b6cee2b77e8055db2b71a14eb45eb69a8df [2021-11-16 23:48:48,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 23:48:48,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 23:48:48,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 23:48:48,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 23:48:48,735 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 23:48:48,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i [2021-11-16 23:48:48,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb95cb587/9668acfaa72a431481a177740f074ed1/FLAG70dc967f7 [2021-11-16 23:48:49,269 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 23:48:49,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i [2021-11-16 23:48:49,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb95cb587/9668acfaa72a431481a177740f074ed1/FLAG70dc967f7 [2021-11-16 23:48:49,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb95cb587/9668acfaa72a431481a177740f074ed1 [2021-11-16 23:48:49,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 23:48:49,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 23:48:49,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 23:48:49,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 23:48:49,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 23:48:49,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:48:49" (1/1) ... [2021-11-16 23:48:49,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f061f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:49, skipping insertion in model container [2021-11-16 23:48:49,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:48:49" (1/1) ... [2021-11-16 23:48:49,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 23:48:49,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 23:48:50,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i[139464,139477] [2021-11-16 23:48:50,334 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 23:48:50,376 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 23:48:50,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i[139464,139477] [2021-11-16 23:48:50,567 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 23:48:50,663 INFO L208 MainTranslator]: Completed translation [2021-11-16 23:48:50,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50 WrapperNode [2021-11-16 23:48:50,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 23:48:50,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 23:48:50,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 23:48:50,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 23:48:50,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,799 INFO L137 Inliner]: procedures = 138, calls = 1364, calls flagged for inlining = 60, calls inlined = 52, statements flattened = 3483 [2021-11-16 23:48:50,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 23:48:50,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 23:48:50,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 23:48:50,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 23:48:50,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 23:48:50,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 23:48:50,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 23:48:50,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 23:48:50,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (1/1) ... [2021-11-16 23:48:50,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 23:48:51,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:48:51,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 23:48:51,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 23:48:51,083 INFO L130 BoogieDeclarations]: Found specification of procedure get_pwm1_auto_point_pwm [2021-11-16 23:48:51,084 INFO L138 BoogieDeclarations]: Found implementation of procedure get_pwm1_auto_point_pwm [2021-11-16 23:48:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 23:48:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure get_fan [2021-11-16 23:48:51,084 INFO L138 BoogieDeclarations]: Found implementation of procedure get_fan [2021-11-16 23:48:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2021-11-16 23:48:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2021-11-16 23:48:51,085 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-11-16 23:48:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-11-16 23:48:51,085 INFO L130 BoogieDeclarations]: Found specification of procedure amc6821_detect [2021-11-16 23:48:51,087 INFO L138 BoogieDeclarations]: Found implementation of procedure amc6821_detect [2021-11-16 23:48:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-16 23:48:51,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-16 23:48:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 23:48:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-16 23:48:51,088 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-16 23:48:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-16 23:48:51,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-16 23:48:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-16 23:48:51,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-16 23:48:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 23:48:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_amc6821_data [2021-11-16 23:48:51,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_amc6821_data [2021-11-16 23:48:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-16 23:48:51,089 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-16 23:48:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure get_temp_auto_point_temp [2021-11-16 23:48:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure get_temp_auto_point_temp [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure set_slope_register [2021-11-16 23:48:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure set_slope_register [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure get_temp_alarm [2021-11-16 23:48:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure get_temp_alarm [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure SENSORS_LIMIT [2021-11-16 23:48:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure SENSORS_LIMIT [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2021-11-16 23:48:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 23:48:51,125 INFO L130 BoogieDeclarations]: Found specification of procedure amc6821_update_device [2021-11-16 23:48:51,125 INFO L138 BoogieDeclarations]: Found implementation of procedure amc6821_update_device [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtol [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtol [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure get_temp [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure get_temp [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure set_fan [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure set_fan [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_amc6821_data [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_amc6821_data [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 23:48:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 23:48:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp_auto_point_temp [2021-11-16 23:48:51,127 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp_auto_point_temp [2021-11-16 23:48:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-16 23:48:51,127 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-16 23:48:51,554 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 23:48:51,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 23:48:55,549 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 23:48:55,557 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 23:48:55,557 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-16 23:48:55,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:48:55 BoogieIcfgContainer [2021-11-16 23:48:55,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 23:48:55,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 23:48:55,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 23:48:55,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 23:48:55,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:48:49" (1/3) ... [2021-11-16 23:48:55,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b59b418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:48:55, skipping insertion in model container [2021-11-16 23:48:55,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:50" (2/3) ... [2021-11-16 23:48:55,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b59b418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:48:55, skipping insertion in model container [2021-11-16 23:48:55,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:48:55" (3/3) ... [2021-11-16 23:48:55,565 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--amc6821.ko-main.cil.out.i [2021-11-16 23:48:55,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 23:48:55,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 23:48:55,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 23:48:55,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 23:48:55,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 23:48:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 816 states, 619 states have (on average 1.505654281098546) internal successors, (932), 626 states have internal predecessors, (932), 170 states have call successors, (170), 25 states have call predecessors, (170), 25 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2021-11-16 23:48:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-16 23:48:55,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:48:55,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:48:55,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:48:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:48:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 562547104, now seen corresponding path program 1 times [2021-11-16 23:48:55,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:48:55,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230263749] [2021-11-16 23:48:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:48:55,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:48:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:48:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 23:48:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:48:56,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:48:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:48:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:48:56,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:48:56,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230263749] [2021-11-16 23:48:56,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230263749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:48:56,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:48:56,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:48:56,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611100381] [2021-11-16 23:48:56,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:48:56,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:48:56,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:48:56,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:48:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:48:56,172 INFO L87 Difference]: Start difference. First operand has 816 states, 619 states have (on average 1.505654281098546) internal successors, (932), 626 states have internal predecessors, (932), 170 states have call successors, (170), 25 states have call predecessors, (170), 25 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:48:58,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:48:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:48:59,316 INFO L93 Difference]: Finished difference Result 2562 states and 4203 transitions. [2021-11-16 23:48:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:48:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-16 23:48:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:48:59,334 INFO L225 Difference]: With dead ends: 2562 [2021-11-16 23:48:59,335 INFO L226 Difference]: Without dead ends: 1741 [2021-11-16 23:48:59,342 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 [2021-11-16 23:48:59,344 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1343 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 401 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:48:59,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3787 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 23:48:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-11-16 23:48:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1594. [2021-11-16 23:48:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1212 states have (on average 1.504950495049505) internal successors, (1824), 1217 states have internal predecessors, (1824), 333 states have call successors, (333), 49 states have call predecessors, (333), 48 states have return successors, (327), 327 states have call predecessors, (327), 327 states have call successors, (327) [2021-11-16 23:48:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2484 transitions. [2021-11-16 23:48:59,483 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2484 transitions. Word has length 29 [2021-11-16 23:48:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:48:59,484 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2484 transitions. [2021-11-16 23:48:59,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:48:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2484 transitions. [2021-11-16 23:48:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-16 23:48:59,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:48:59,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:48:59,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 23:48:59,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:48:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:48:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1256835525, now seen corresponding path program 1 times [2021-11-16 23:48:59,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:48:59,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988976124] [2021-11-16 23:48:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:48:59,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:48:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:48:59,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:48:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:48:59,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:48:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:48:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:48:59,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:48:59,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988976124] [2021-11-16 23:48:59,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988976124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:48:59,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:48:59,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:48:59,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648490679] [2021-11-16 23:48:59,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:48:59,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:48:59,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:48:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:48:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:48:59,617 INFO L87 Difference]: Start difference. First operand 1594 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:01,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:02,830 INFO L93 Difference]: Finished difference Result 5026 states and 7920 transitions. [2021-11-16 23:49:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-16 23:49:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:02,845 INFO L225 Difference]: With dead ends: 5026 [2021-11-16 23:49:02,846 INFO L226 Difference]: Without dead ends: 3435 [2021-11-16 23:49:02,851 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 [2021-11-16 23:49:02,852 INFO L933 BasicCegarLoop]: 1550 mSDtfsCounter, 1340 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 400 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:02,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3800 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 23:49:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-16 23:49:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3156. [2021-11-16 23:49:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 2401 states have (on average 1.5052061640982923) internal successors, (3614), 2406 states have internal predecessors, (3614), 658 states have call successors, (658), 97 states have call predecessors, (658), 96 states have return successors, (652), 652 states have call predecessors, (652), 652 states have call successors, (652) [2021-11-16 23:49:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 4924 transitions. [2021-11-16 23:49:02,945 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 4924 transitions. Word has length 30 [2021-11-16 23:49:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 4924 transitions. [2021-11-16 23:49:02,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 4924 transitions. [2021-11-16 23:49:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-16 23:49:02,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:02,947 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] [2021-11-16 23:49:02,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 23:49:02,948 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1258897429, now seen corresponding path program 1 times [2021-11-16 23:49:02,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:02,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843706592] [2021-11-16 23:49:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:02,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:03,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 23:49:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:03,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:03,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843706592] [2021-11-16 23:49:03,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843706592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:03,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:03,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:03,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533635370] [2021-11-16 23:49:03,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:03,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:03,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:03,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:03,067 INFO L87 Difference]: Start difference. First operand 3156 states and 4924 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:05,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:06,403 INFO L93 Difference]: Finished difference Result 9966 states and 15718 transitions. [2021-11-16 23:49:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:06,404 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 [2021-11-16 23:49:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:06,450 INFO L225 Difference]: With dead ends: 9966 [2021-11-16 23:49:06,450 INFO L226 Difference]: Without dead ends: 6813 [2021-11-16 23:49:06,464 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 [2021-11-16 23:49:06,467 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 1340 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 399 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3822 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:06,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3822 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 456 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-16 23:49:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6813 states. [2021-11-16 23:49:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6813 to 6270. [2021-11-16 23:49:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 4771 states have (on average 1.5045063927897715) internal successors, (7178), 4776 states have internal predecessors, (7178), 1306 states have call successors, (1306), 193 states have call predecessors, (1306), 192 states have return successors, (1300), 1300 states have call predecessors, (1300), 1300 states have call successors, (1300) [2021-11-16 23:49:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 9784 transitions. [2021-11-16 23:49:06,706 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 9784 transitions. Word has length 33 [2021-11-16 23:49:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:06,707 INFO L470 AbstractCegarLoop]: Abstraction has 6270 states and 9784 transitions. [2021-11-16 23:49:06,707 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) [2021-11-16 23:49:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 9784 transitions. [2021-11-16 23:49:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-16 23:49:06,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:06,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:49:06,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 23:49:06,710 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1575112406, now seen corresponding path program 1 times [2021-11-16 23:49:06,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:06,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418460912] [2021-11-16 23:49:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:06,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:06,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:49:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:06,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:06,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:06,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418460912] [2021-11-16 23:49:06,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418460912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:06,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:06,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:06,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137623224] [2021-11-16 23:49:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:06,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:06,864 INFO L87 Difference]: Start difference. First operand 6270 states and 9784 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:08,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:10,090 INFO L93 Difference]: Finished difference Result 19812 states and 31242 transitions. [2021-11-16 23:49:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-16 23:49:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:10,175 INFO L225 Difference]: With dead ends: 19812 [2021-11-16 23:49:10,176 INFO L226 Difference]: Without dead ends: 13545 [2021-11-16 23:49:10,203 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 [2021-11-16 23:49:10,211 INFO L933 BasicCegarLoop]: 1608 mSDtfsCounter, 1343 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 391 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3907 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:10,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3907 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 23:49:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13545 states. [2021-11-16 23:49:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13545 to 12474. [2021-11-16 23:49:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12474 states, 9491 states have (on average 1.5035296596775893) internal successors, (14270), 9496 states have internal predecessors, (14270), 2598 states have call successors, (2598), 385 states have call predecessors, (2598), 384 states have return successors, (2592), 2592 states have call predecessors, (2592), 2592 states have call successors, (2592) [2021-11-16 23:49:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12474 states to 12474 states and 19460 transitions. [2021-11-16 23:49:10,699 INFO L78 Accepts]: Start accepts. Automaton has 12474 states and 19460 transitions. Word has length 30 [2021-11-16 23:49:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:10,700 INFO L470 AbstractCegarLoop]: Abstraction has 12474 states and 19460 transitions. [2021-11-16 23:49:10,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 12474 states and 19460 transitions. [2021-11-16 23:49:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-16 23:49:10,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:10,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:49:10,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 23:49:10,703 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash 701010116, now seen corresponding path program 1 times [2021-11-16 23:49:10,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:10,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503255891] [2021-11-16 23:49:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:10,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:10,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-16 23:49:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:10,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:10,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503255891] [2021-11-16 23:49:10,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503255891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:10,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:10,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:10,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618085696] [2021-11-16 23:49:10,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:10,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:10,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:10,869 INFO L87 Difference]: Start difference. First operand 12474 states and 19460 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:12,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:14,461 INFO L93 Difference]: Finished difference Result 39368 states and 62038 transitions. [2021-11-16 23:49:14,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:14,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-16 23:49:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:14,578 INFO L225 Difference]: With dead ends: 39368 [2021-11-16 23:49:14,578 INFO L226 Difference]: Without dead ends: 26897 [2021-11-16 23:49:14,631 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 [2021-11-16 23:49:14,631 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1328 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 389 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:14,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1445 Valid, 3921 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 458 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 23:49:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26897 states. [2021-11-16 23:49:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26897 to 24770. [2021-11-16 23:49:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24770 states, 18843 states have (on average 1.5019901289603566) internal successors, (28302), 18848 states have internal predecessors, (28302), 5158 states have call successors, (5158), 769 states have call predecessors, (5158), 768 states have return successors, (5152), 5152 states have call predecessors, (5152), 5152 states have call successors, (5152) [2021-11-16 23:49:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24770 states to 24770 states and 38612 transitions. [2021-11-16 23:49:15,489 INFO L78 Accepts]: Start accepts. Automaton has 24770 states and 38612 transitions. Word has length 39 [2021-11-16 23:49:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:15,489 INFO L470 AbstractCegarLoop]: Abstraction has 24770 states and 38612 transitions. [2021-11-16 23:49:15,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24770 states and 38612 transitions. [2021-11-16 23:49:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-16 23:49:15,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:15,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:49:15,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 23:49:15,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -176446361, now seen corresponding path program 1 times [2021-11-16 23:49:15,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:15,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33030562] [2021-11-16 23:49:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:15,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 23:49:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:15,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:15,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:15,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33030562] [2021-11-16 23:49:15,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33030562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:15,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:15,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:15,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035805631] [2021-11-16 23:49:15,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:15,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:15,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:15,716 INFO L87 Difference]: Start difference. First operand 24770 states and 38612 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:17,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:19,935 INFO L93 Difference]: Finished difference Result 78208 states and 123158 transitions. [2021-11-16 23:49:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-16 23:49:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:20,166 INFO L225 Difference]: With dead ends: 78208 [2021-11-16 23:49:20,167 INFO L226 Difference]: Without dead ends: 53441 [2021-11-16 23:49:20,244 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 [2021-11-16 23:49:20,246 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 1331 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 387 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 3952 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:20,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 3952 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 459 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-16 23:49:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53441 states. [2021-11-16 23:49:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53441 to 49202. [2021-11-16 23:49:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49202 states, 37419 states have (on average 1.5003607792832518) internal successors, (56142), 37424 states have internal predecessors, (56142), 10246 states have call successors, (10246), 1537 states have call predecessors, (10246), 1536 states have return successors, (10240), 10240 states have call predecessors, (10240), 10240 states have call successors, (10240) [2021-11-16 23:49:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49202 states to 49202 states and 76628 transitions. [2021-11-16 23:49:21,982 INFO L78 Accepts]: Start accepts. Automaton has 49202 states and 76628 transitions. Word has length 35 [2021-11-16 23:49:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:21,984 INFO L470 AbstractCegarLoop]: Abstraction has 49202 states and 76628 transitions. [2021-11-16 23:49:21,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49202 states and 76628 transitions. [2021-11-16 23:49:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-16 23:49:21,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:21,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:49:21,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 23:49:21,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash -947297063, now seen corresponding path program 1 times [2021-11-16 23:49:21,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:21,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138046452] [2021-11-16 23:49:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:22,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-16 23:49:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:22,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:22,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138046452] [2021-11-16 23:49:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138046452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:22,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:22,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:22,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020684227] [2021-11-16 23:49:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:22,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:22,131 INFO L87 Difference]: Start difference. First operand 49202 states and 76628 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:24,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:27,296 INFO L93 Difference]: Finished difference Result 155408 states and 244534 transitions. [2021-11-16 23:49:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-11-16 23:49:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:27,765 INFO L225 Difference]: With dead ends: 155408 [2021-11-16 23:49:27,765 INFO L226 Difference]: Without dead ends: 106209 [2021-11-16 23:49:27,891 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 [2021-11-16 23:49:27,891 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 1330 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 385 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 3982 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:27,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 3982 Invalid, 845 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [385 Valid, 459 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 23:49:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106209 states. [2021-11-16 23:49:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106209 to 97746. [2021-11-16 23:49:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97746 states, 74315 states have (on average 1.4986745609903789) internal successors, (111374), 74320 states have internal predecessors, (111374), 20358 states have call successors, (20358), 3073 states have call predecessors, (20358), 3072 states have return successors, (20352), 20352 states have call predecessors, (20352), 20352 states have call successors, (20352) [2021-11-16 23:49:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97746 states to 97746 states and 152084 transitions. [2021-11-16 23:49:31,473 INFO L78 Accepts]: Start accepts. Automaton has 97746 states and 152084 transitions. Word has length 36 [2021-11-16 23:49:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:31,473 INFO L470 AbstractCegarLoop]: Abstraction has 97746 states and 152084 transitions. [2021-11-16 23:49:31,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97746 states and 152084 transitions. [2021-11-16 23:49:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-16 23:49:31,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:31,475 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] [2021-11-16 23:49:31,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 23:49:31,476 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1388157961, now seen corresponding path program 1 times [2021-11-16 23:49:31,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:31,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982824011] [2021-11-16 23:49:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:31,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:31,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 23:49:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:31,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:31,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:31,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982824011] [2021-11-16 23:49:31,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982824011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:31,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:31,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:31,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763396564] [2021-11-16 23:49:31,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:31,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:31,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:31,573 INFO L87 Difference]: Start difference. First operand 97746 states and 152084 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:33,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:39,031 INFO L93 Difference]: Finished difference Result 309360 states and 486326 transitions. [2021-11-16 23:49:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:39,031 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 [2021-11-16 23:49:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:49:40,256 INFO L225 Difference]: With dead ends: 309360 [2021-11-16 23:49:40,256 INFO L226 Difference]: Without dead ends: 211617 [2021-11-16 23:49:40,542 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 [2021-11-16 23:49:40,546 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 1339 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 384 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 4016 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-16 23:49:40,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 4016 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-16 23:49:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211617 states. [2021-11-16 23:49:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211617 to 194706. [2021-11-16 23:49:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194706 states, 147979 states have (on average 1.49738814291217) internal successors, (221582), 147984 states have internal predecessors, (221582), 40582 states have call successors, (40582), 6145 states have call predecessors, (40582), 6144 states have return successors, (40576), 40576 states have call predecessors, (40576), 40576 states have call successors, (40576) [2021-11-16 23:49:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194706 states to 194706 states and 302740 transitions. [2021-11-16 23:49:46,903 INFO L78 Accepts]: Start accepts. Automaton has 194706 states and 302740 transitions. Word has length 34 [2021-11-16 23:49:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:49:46,903 INFO L470 AbstractCegarLoop]: Abstraction has 194706 states and 302740 transitions. [2021-11-16 23:49:46,904 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) [2021-11-16 23:49:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 194706 states and 302740 transitions. [2021-11-16 23:49:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-16 23:49:46,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:49:46,906 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] [2021-11-16 23:49:46,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-16 23:49:46,906 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:49:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:49:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1220342292, now seen corresponding path program 1 times [2021-11-16 23:49:46,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:49:46,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518510656] [2021-11-16 23:49:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:49:46,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:49:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 23:49:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:49:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:49:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:49:47,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:49:47,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518510656] [2021-11-16 23:49:47,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518510656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:49:47,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:49:47,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 23:49:47,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458334515] [2021-11-16 23:49:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:49:47,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:49:47,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:49:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:49:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 23:49:47,010 INFO L87 Difference]: Start difference. First operand 194706 states and 302740 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-16 23:49:49,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:49:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:49:59,312 INFO L93 Difference]: Finished difference Result 616368 states and 968118 transitions. [2021-11-16 23:49:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:49:59,313 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 [2021-11-16 23:49:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:50:01,763 INFO L225 Difference]: With dead ends: 616368 [2021-11-16 23:50:01,764 INFO L226 Difference]: Without dead ends: 421665 [2021-11-16 23:50:02,445 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 [2021-11-16 23:50:02,447 INFO L933 BasicCegarLoop]: 1676 mSDtfsCounter, 1332 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 383 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 4035 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:50:02,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 4035 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 23:50:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421665 states.