./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.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 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:39:48,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:39:48,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:39:48,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:39:48,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:39:48,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:39:48,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:39:48,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:39:48,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:39:48,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:39:48,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:39:48,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:39:48,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:39:48,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:39:48,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:39:48,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:39:48,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:39:48,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:39:48,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:39:48,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:39:48,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:39:48,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:39:48,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:39:48,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:39:48,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:39:48,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:39:48,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:39:48,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:39:48,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:39:48,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:39:48,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:39:48,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:39:48,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:39:48,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:39:48,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:39:48,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:39:48,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:39:48,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:39:48,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:39:48,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:39:48,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:39:48,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:39:48,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:39:48,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:39:48,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:39:48,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:39:48,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:39:48,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:39:48,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:39:48,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:39:48,261 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:39:48,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:39:48,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:39:48,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:39:48,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:39:48,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:39:48,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:39:48,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:39:48,264 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:39:48,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:39:48,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:39:48,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:39:48,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:39:48,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:39:48,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:39:48,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:39:48,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:39:48,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:39:48,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:39:48,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:39:48,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:39:48,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:39:48,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:39:48,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2021-12-14 17:39:48,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:39:48,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:39:48,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:39:48,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:39:48,506 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:39:48,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-12-14 17:39:48,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e318aa2/084176765f684adc947e85effb2c9258/FLAG4748c6bed [2021-12-14 17:39:49,245 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:39:49,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-12-14 17:39:49,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e318aa2/084176765f684adc947e85effb2c9258/FLAG4748c6bed [2021-12-14 17:39:49,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e318aa2/084176765f684adc947e85effb2c9258 [2021-12-14 17:39:49,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:39:49,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:39:49,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:39:49,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:39:49,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:39:49,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:39:49" (1/1) ... [2021-12-14 17:39:49,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272425ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:49, skipping insertion in model container [2021-12-14 17:39:49,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:39:49" (1/1) ... [2021-12-14 17:39:49,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:39:49,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:39:51,009 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/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-12-14 17:39:51,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:39:51,110 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:39:51,507 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/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-12-14 17:39:51,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:39:51,609 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:39:51,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51 WrapperNode [2021-12-14 17:39:51,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:39:51,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:39:51,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:39:51,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:39:51,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:51,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:51,904 INFO L137 Inliner]: procedures = 282, calls = 3066, calls flagged for inlining = 129, calls inlined = 120, statements flattened = 6764 [2021-12-14 17:39:51,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:39:51,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:39:51,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:39:51,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:39:51,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:51,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:51,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:51,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:52,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:52,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:52,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:52,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:39:52,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:39:52,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:39:52,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:39:52,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (1/1) ... [2021-12-14 17:39:52,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:39:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:39:52,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:39:52,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:39:52,310 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-12-14 17:39:52,310 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-12-14 17:39:52,310 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-12-14 17:39:52,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:39:52,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:39:52,311 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2021-12-14 17:39:52,311 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2021-12-14 17:39:52,311 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2021-12-14 17:39:52,311 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2021-12-14 17:39:52,311 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-12-14 17:39:52,311 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-12-14 17:39:52,311 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-12-14 17:39:52,312 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-12-14 17:39:52,312 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-12-14 17:39:52,312 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-12-14 17:39:52,312 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-14 17:39:52,312 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-14 17:39:52,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:39:52,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:39:52,313 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2021-12-14 17:39:52,313 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2021-12-14 17:39:52,313 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-14 17:39:52,313 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-14 17:39:52,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:39:52,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:39:52,313 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-12-14 17:39:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-12-14 17:39:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-14 17:39:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-14 17:39:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:39:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:39:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2021-12-14 17:39:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2021-12-14 17:39:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2021-12-14 17:39:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2021-12-14 17:39:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2021-12-14 17:39:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2021-12-14 17:39:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-14 17:39:52,316 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-14 17:39:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2021-12-14 17:39:52,316 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2021-12-14 17:39:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:39:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_st_ref_mutex [2021-12-14 17:39:52,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_st_ref_mutex [2021-12-14 17:39:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2021-12-14 17:39:52,316 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2021-12-14 17:39:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-12-14 17:39:52,317 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-12-14 17:39:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:39:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-12-14 17:39:52,317 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-12-14 17:39:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2021-12-14 17:39:52,317 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2021-12-14 17:39:52,318 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-12-14 17:39:52,318 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-14 17:39:52,318 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-14 17:39:52,319 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-12-14 17:39:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-12-14 17:39:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-12-14 17:39:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-12-14 17:39:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:39:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2021-12-14 17:39:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2021-12-14 17:39:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:39:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2021-12-14 17:39:52,321 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2021-12-14 17:39:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:39:52,321 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:39:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-12-14 17:39:52,322 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-12-14 17:39:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2021-12-14 17:39:52,322 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2021-12-14 17:39:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2021-12-14 17:39:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2021-12-14 17:39:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-12-14 17:39:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-12-14 17:39:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-14 17:39:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-14 17:39:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-14 17:39:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-14 17:39:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:39:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:39:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2021-12-14 17:39:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2021-12-14 17:39:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-14 17:39:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-14 17:39:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-14 17:39:52,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-14 17:39:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2021-12-14 17:39:52,325 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2021-12-14 17:39:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-12-14 17:39:52,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-12-14 17:39:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:39:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-14 17:39:52,326 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-14 17:39:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2021-12-14 17:39:52,327 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2021-12-14 17:39:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-12-14 17:39:52,327 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-12-14 17:39:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2021-12-14 17:39:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2021-12-14 17:39:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:39:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2021-12-14 17:39:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2021-12-14 17:39:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:39:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2021-12-14 17:39:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2021-12-14 17:39:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2021-12-14 17:39:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2021-12-14 17:39:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2021-12-14 17:39:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2021-12-14 17:39:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2021-12-14 17:39:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2021-12-14 17:39:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:39:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:39:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2021-12-14 17:39:52,331 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2021-12-14 17:39:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-12-14 17:39:52,332 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-12-14 17:39:52,334 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2021-12-14 17:39:52,334 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2021-12-14 17:39:52,334 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-12-14 17:39:52,334 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-12-14 17:39:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:39:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:39:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2021-12-14 17:39:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2021-12-14 17:39:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:39:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-12-14 17:39:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-12-14 17:39:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-12-14 17:39:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:39:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_st_ref_mutex [2021-12-14 17:39:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_st_ref_mutex [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-14 17:39:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-12-14 17:39:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-12-14 17:39:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-12-14 17:39:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-12-14 17:39:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:39:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-14 17:39:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2021-12-14 17:39:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2021-12-14 17:39:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2021-12-14 17:39:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2021-12-14 17:39:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-12-14 17:39:52,339 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-12-14 17:39:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-12-14 17:39:52,339 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-12-14 17:39:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2021-12-14 17:39:52,339 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2021-12-14 17:39:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-14 17:39:52,339 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-14 17:39:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2021-12-14 17:39:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2021-12-14 17:39:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-12-14 17:39:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-12-14 17:39:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-12-14 17:39:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-12-14 17:39:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-12-14 17:39:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-12-14 17:39:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-14 17:39:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-14 17:39:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:39:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2021-12-14 17:39:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2021-12-14 17:39:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2021-12-14 17:39:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2021-12-14 17:39:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:39:52,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:39:53,124 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:39:53,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:40:00,101 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:40:00,130 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:40:00,131 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:40:00,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:40:00 BoogieIcfgContainer [2021-12-14 17:40:00,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:40:00,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:40:00,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:40:00,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:40:00,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:39:49" (1/3) ... [2021-12-14 17:40:00,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271f3629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:40:00, skipping insertion in model container [2021-12-14 17:40:00,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:51" (2/3) ... [2021-12-14 17:40:00,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271f3629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:40:00, skipping insertion in model container [2021-12-14 17:40:00,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:40:00" (3/3) ... [2021-12-14 17:40:00,143 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-12-14 17:40:00,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:40:00,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:40:00,195 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:40:00,201 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:40:00,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:40:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 2115 states, 1690 states have (on average 1.485207100591716) internal successors, (2510), 1712 states have internal predecessors, (2510), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) [2021-12-14 17:40:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 17:40:00,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:00,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:00,247 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash -652520665, now seen corresponding path program 1 times [2021-12-14 17:40:00,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:00,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134720819] [2021-12-14 17:40:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:00,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:00,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:40:00,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:00,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134720819] [2021-12-14 17:40:00,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134720819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:00,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:00,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:40:00,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828311912] [2021-12-14 17:40:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:00,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:40:00,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:40:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:00,692 INFO L87 Difference]: Start difference. First operand has 2115 states, 1690 states have (on average 1.485207100591716) internal successors, (2510), 1712 states have internal predecessors, (2510), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:00,931 INFO L93 Difference]: Finished difference Result 4222 states and 6502 transitions. [2021-12-14 17:40:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:40:00,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-14 17:40:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:00,969 INFO L225 Difference]: With dead ends: 4222 [2021-12-14 17:40:00,970 INFO L226 Difference]: Without dead ends: 2109 [2021-12-14 17:40:00,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:00,993 INFO L933 BasicCegarLoop]: 3187 mSDtfsCounter, 3183 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3183 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:00,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3183 Valid, 3187 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:40:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-12-14 17:40:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2109. [2021-12-14 17:40:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 1686 states have (on average 1.4839857651245552) internal successors, (2502), 1706 states have internal predecessors, (2502), 345 states have call successors, (345), 78 states have call predecessors, (345), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-12-14 17:40:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3184 transitions. [2021-12-14 17:40:01,179 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3184 transitions. Word has length 18 [2021-12-14 17:40:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:01,180 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3184 transitions. [2021-12-14 17:40:01,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3184 transitions. [2021-12-14 17:40:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 17:40:01,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:01,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:01,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:40:01,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 48543913, now seen corresponding path program 1 times [2021-12-14 17:40:01,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411784118] [2021-12-14 17:40:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:01,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:40:01,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411784118] [2021-12-14 17:40:01,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411784118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:01,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:01,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:40:01,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784951953] [2021-12-14 17:40:01,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:01,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:40:01,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:40:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:01,357 INFO L87 Difference]: Start difference. First operand 2109 states and 3184 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:01,539 INFO L93 Difference]: Finished difference Result 4211 states and 6359 transitions. [2021-12-14 17:40:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:40:01,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-14 17:40:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:01,554 INFO L225 Difference]: With dead ends: 4211 [2021-12-14 17:40:01,554 INFO L226 Difference]: Without dead ends: 2109 [2021-12-14 17:40:01,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:01,569 INFO L933 BasicCegarLoop]: 3182 mSDtfsCounter, 3177 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3177 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:01,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3177 Valid, 3182 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:40:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-12-14 17:40:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2109. [2021-12-14 17:40:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 1686 states have (on average 1.4833926453143536) internal successors, (2501), 1706 states have internal predecessors, (2501), 345 states have call successors, (345), 78 states have call predecessors, (345), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-12-14 17:40:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3183 transitions. [2021-12-14 17:40:01,651 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3183 transitions. Word has length 18 [2021-12-14 17:40:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:01,652 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3183 transitions. [2021-12-14 17:40:01,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3183 transitions. [2021-12-14 17:40:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 17:40:01,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:01,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:01,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:40:01,654 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -344483097, now seen corresponding path program 1 times [2021-12-14 17:40:01,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262888917] [2021-12-14 17:40:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:01,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:01,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:40:01,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262888917] [2021-12-14 17:40:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262888917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:01,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:01,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:40:01,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688901439] [2021-12-14 17:40:01,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:01,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:40:01,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:40:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:01,805 INFO L87 Difference]: Start difference. First operand 2109 states and 3183 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:01,911 INFO L93 Difference]: Finished difference Result 2111 states and 3184 transitions. [2021-12-14 17:40:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:40:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-14 17:40:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:01,929 INFO L225 Difference]: With dead ends: 2111 [2021-12-14 17:40:01,929 INFO L226 Difference]: Without dead ends: 2108 [2021-12-14 17:40:01,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:01,937 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 3168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3168 SdHoareTripleChecker+Valid, 3180 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:01,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3168 Valid, 3180 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:40:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-14 17:40:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2108. [2021-12-14 17:40:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1686 states have (on average 1.482799525504152) internal successors, (2500), 1705 states have internal predecessors, (2500), 344 states have call successors, (344), 78 states have call predecessors, (344), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-12-14 17:40:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3181 transitions. [2021-12-14 17:40:02,015 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3181 transitions. Word has length 18 [2021-12-14 17:40:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:02,016 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3181 transitions. [2021-12-14 17:40:02,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3181 transitions. [2021-12-14 17:40:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 17:40:02,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:02,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:02,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:40:02,018 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:02,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:02,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2089760103, now seen corresponding path program 1 times [2021-12-14 17:40:02,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:02,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219482159] [2021-12-14 17:40:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:02,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:02,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:40:02,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:02,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219482159] [2021-12-14 17:40:02,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219482159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:02,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:02,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:40:02,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247165213] [2021-12-14 17:40:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:02,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:40:02,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:40:02,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:02,149 INFO L87 Difference]: Start difference. First operand 2108 states and 3181 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:02,347 INFO L93 Difference]: Finished difference Result 6200 states and 9371 transitions. [2021-12-14 17:40:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:40:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-14 17:40:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:02,375 INFO L225 Difference]: With dead ends: 6200 [2021-12-14 17:40:02,375 INFO L226 Difference]: Without dead ends: 4133 [2021-12-14 17:40:02,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:02,389 INFO L933 BasicCegarLoop]: 5185 mSDtfsCounter, 3163 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 8243 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:02,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3163 Valid, 8243 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:40:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-12-14 17:40:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4128. [2021-12-14 17:40:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 3314 states have (on average 1.4846107423053712) internal successors, (4920), 3345 states have internal predecessors, (4920), 662 states have call successors, (662), 153 states have call predecessors, (662), 151 states have return successors, (657), 651 states have call predecessors, (657), 651 states have call successors, (657) [2021-12-14 17:40:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6239 transitions. [2021-12-14 17:40:02,588 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6239 transitions. Word has length 19 [2021-12-14 17:40:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:02,588 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6239 transitions. [2021-12-14 17:40:02,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6239 transitions. [2021-12-14 17:40:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 17:40:02,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:02,590 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] [2021-12-14 17:40:02,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:40:02,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash -358767574, now seen corresponding path program 1 times [2021-12-14 17:40:02,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599503645] [2021-12-14 17:40:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:02,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:02,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:40:02,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599503645] [2021-12-14 17:40:02,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599503645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:02,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:02,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:40:02,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499660975] [2021-12-14 17:40:02,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:02,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:40:02,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:40:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:02,691 INFO L87 Difference]: Start difference. First operand 4128 states and 6239 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:02,832 INFO L93 Difference]: Finished difference Result 4130 states and 6240 transitions. [2021-12-14 17:40:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:40:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-14 17:40:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:02,857 INFO L225 Difference]: With dead ends: 4130 [2021-12-14 17:40:02,857 INFO L226 Difference]: Without dead ends: 4127 [2021-12-14 17:40:02,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:02,861 INFO L933 BasicCegarLoop]: 3178 mSDtfsCounter, 3164 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3164 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:02,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3164 Valid, 3178 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:40:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-12-14 17:40:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4127. [2021-12-14 17:40:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 3314 states have (on average 1.484308992154496) internal successors, (4919), 3344 states have internal predecessors, (4919), 661 states have call successors, (661), 153 states have call predecessors, (661), 151 states have return successors, (657), 651 states have call predecessors, (657), 651 states have call successors, (657) [2021-12-14 17:40:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 6237 transitions. [2021-12-14 17:40:03,012 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 6237 transitions. Word has length 20 [2021-12-14 17:40:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:03,012 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 6237 transitions. [2021-12-14 17:40:03,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 6237 transitions. [2021-12-14 17:40:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 17:40:03,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:03,014 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] [2021-12-14 17:40:03,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:40:03,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1762398140, now seen corresponding path program 1 times [2021-12-14 17:40:03,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:03,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005341838] [2021-12-14 17:40:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:03,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:40:03,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005341838] [2021-12-14 17:40:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005341838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:03,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:03,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:40:03,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287859980] [2021-12-14 17:40:03,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:40:03,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:40:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:03,107 INFO L87 Difference]: Start difference. First operand 4127 states and 6237 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:03,252 INFO L93 Difference]: Finished difference Result 4199 states and 6295 transitions. [2021-12-14 17:40:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:40:03,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-14 17:40:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:03,282 INFO L225 Difference]: With dead ends: 4199 [2021-12-14 17:40:03,282 INFO L226 Difference]: Without dead ends: 4178 [2021-12-14 17:40:03,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:40:03,289 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 2999 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:03,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2999 Valid, 3365 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:40:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-12-14 17:40:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 4176. [2021-12-14 17:40:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.4766160262138814) internal successors, (4957), 3385 states have internal predecessors, (4957), 651 states have call successors, (651), 169 states have call predecessors, (651), 167 states have return successors, (649), 643 states have call predecessors, (649), 643 states have call successors, (649) [2021-12-14 17:40:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6257 transitions. [2021-12-14 17:40:03,514 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6257 transitions. Word has length 21 [2021-12-14 17:40:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6257 transitions. [2021-12-14 17:40:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 17:40:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6257 transitions. [2021-12-14 17:40:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 17:40:03,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:03,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:03,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:40:03,520 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 311089182, now seen corresponding path program 1 times [2021-12-14 17:40:03,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:03,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659646676] [2021-12-14 17:40:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:03,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:40:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:40:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:40:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:40:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:40:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 17:40:03,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:03,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659646676] [2021-12-14 17:40:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659646676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:03,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:03,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:40:03,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544656467] [2021-12-14 17:40:03,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:03,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:40:03,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:40:03,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:40:03,757 INFO L87 Difference]: Start difference. First operand 4176 states and 6257 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:40:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:07,864 INFO L93 Difference]: Finished difference Result 8302 states and 12449 transitions. [2021-12-14 17:40:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:40:07,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2021-12-14 17:40:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:07,890 INFO L225 Difference]: With dead ends: 8302 [2021-12-14 17:40:07,891 INFO L226 Difference]: Without dead ends: 4179 [2021-12-14 17:40:07,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:40:07,910 INFO L933 BasicCegarLoop]: 4069 mSDtfsCounter, 4476 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4786 SdHoareTripleChecker+Valid, 7246 SdHoareTripleChecker+Invalid, 3392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:07,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4786 Valid, 7246 Invalid, 3392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-14 17:40:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-12-14 17:40:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 4176. [2021-12-14 17:40:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.476020256181114) internal successors, (4955), 3385 states have internal predecessors, (4955), 651 states have call successors, (651), 169 states have call predecessors, (651), 167 states have return successors, (643), 643 states have call predecessors, (643), 640 states have call successors, (643) [2021-12-14 17:40:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6249 transitions. [2021-12-14 17:40:08,097 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6249 transitions. Word has length 61 [2021-12-14 17:40:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:08,098 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6249 transitions. [2021-12-14 17:40:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:40:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6249 transitions. [2021-12-14 17:40:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 17:40:08,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:08,105 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:40:08,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash -533382689, now seen corresponding path program 1 times [2021-12-14 17:40:08,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:08,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147073372] [2021-12-14 17:40:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:08,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:40:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:40:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:40:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:40:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:40:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 17:40:08,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147073372] [2021-12-14 17:40:08,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147073372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:08,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:08,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:40:08,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309580457] [2021-12-14 17:40:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:40:08,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:40:08,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:40:08,345 INFO L87 Difference]: Start difference. First operand 4176 states and 6249 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:40:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:14,482 INFO L93 Difference]: Finished difference Result 6230 states and 9444 transitions. [2021-12-14 17:40:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:40:14,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2021-12-14 17:40:14,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:14,533 INFO L225 Difference]: With dead ends: 6230 [2021-12-14 17:40:14,534 INFO L226 Difference]: Without dead ends: 5207 [2021-12-14 17:40:14,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:40:14,542 INFO L933 BasicCegarLoop]: 4139 mSDtfsCounter, 2802 mSDsluCounter, 11997 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2938 SdHoareTripleChecker+Valid, 16136 SdHoareTripleChecker+Invalid, 6453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:14,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2938 Valid, 16136 Invalid, 6453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 5819 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-14 17:40:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2021-12-14 17:40:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 3858. [2021-12-14 17:40:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3079 states have (on average 1.4624878207210132) internal successors, (4503), 3105 states have internal predecessors, (4503), 612 states have call successors, (612), 168 states have call predecessors, (612), 166 states have return successors, (606), 606 states have call predecessors, (606), 603 states have call successors, (606) [2021-12-14 17:40:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5721 transitions. [2021-12-14 17:40:14,789 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5721 transitions. Word has length 61 [2021-12-14 17:40:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:14,790 INFO L470 AbstractCegarLoop]: Abstraction has 3858 states and 5721 transitions. [2021-12-14 17:40:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:40:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5721 transitions. [2021-12-14 17:40:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 17:40:14,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:14,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:14,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:40:14,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1487077295, now seen corresponding path program 1 times [2021-12-14 17:40:14,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:14,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145586104] [2021-12-14 17:40:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:14,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:40:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:40:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:40:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:40:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:40:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 17:40:14,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:14,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145586104] [2021-12-14 17:40:14,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145586104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:14,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:14,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:40:14,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704558695] [2021-12-14 17:40:14,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:14,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:40:14,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:14,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:40:14,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:40:14,976 INFO L87 Difference]: Start difference. First operand 3858 states and 5721 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 17:40:19,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:40:23,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:40:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:25,237 INFO L93 Difference]: Finished difference Result 8734 states and 13155 transitions. [2021-12-14 17:40:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:40:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2021-12-14 17:40:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:25,264 INFO L225 Difference]: With dead ends: 8734 [2021-12-14 17:40:25,264 INFO L226 Difference]: Without dead ends: 4929 [2021-12-14 17:40:25,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:40:25,283 INFO L933 BasicCegarLoop]: 3040 mSDtfsCounter, 2483 mSDsluCounter, 3817 mSDsCounter, 0 mSdLazyCounter, 3728 mSolverCounterSat, 1060 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2777 SdHoareTripleChecker+Valid, 6857 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1060 IncrementalHoareTripleChecker+Valid, 3728 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:25,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2777 Valid, 6857 Invalid, 4790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1060 Valid, 3728 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-12-14 17:40:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2021-12-14 17:40:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4650. [2021-12-14 17:40:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 3730 states have (on average 1.470509383378016) internal successors, (5485), 3761 states have internal predecessors, (5485), 753 states have call successors, (753), 168 states have call predecessors, (753), 166 states have return successors, (748), 748 states have call predecessors, (748), 744 states have call successors, (748) [2021-12-14 17:40:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6986 transitions. [2021-12-14 17:40:25,507 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6986 transitions. Word has length 63 [2021-12-14 17:40:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:25,508 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 6986 transitions. [2021-12-14 17:40:25,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 17:40:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6986 transitions. [2021-12-14 17:40:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 17:40:25,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:25,512 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:25,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 17:40:25,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1372433969, now seen corresponding path program 1 times [2021-12-14 17:40:25,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:25,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462836896] [2021-12-14 17:40:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:25,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:40:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:40:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:40:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:40:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:40:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:40:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:40:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:40:25,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:25,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462836896] [2021-12-14 17:40:25,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462836896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:25,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:25,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:40:25,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793162382] [2021-12-14 17:40:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:25,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:40:25,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:40:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:40:25,714 INFO L87 Difference]: Start difference. First operand 4650 states and 6986 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:40:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:31,394 INFO L93 Difference]: Finished difference Result 7940 states and 12018 transitions. [2021-12-14 17:40:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:40:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-12-14 17:40:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:31,475 INFO L225 Difference]: With dead ends: 7940 [2021-12-14 17:40:31,476 INFO L226 Difference]: Without dead ends: 6458 [2021-12-14 17:40:31,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:40:31,483 INFO L933 BasicCegarLoop]: 4130 mSDtfsCounter, 3706 mSDsluCounter, 10979 mSDsCounter, 0 mSdLazyCounter, 5817 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3842 SdHoareTripleChecker+Valid, 15109 SdHoareTripleChecker+Invalid, 6541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 5817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:31,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3842 Valid, 15109 Invalid, 6541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 5817 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-14 17:40:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-12-14 17:40:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 4648. [2021-12-14 17:40:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3728 states have (on average 1.470225321888412) internal successors, (5481), 3759 states have internal predecessors, (5481), 753 states have call successors, (753), 168 states have call predecessors, (753), 166 states have return successors, (748), 748 states have call predecessors, (748), 744 states have call successors, (748) [2021-12-14 17:40:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 6982 transitions. [2021-12-14 17:40:31,687 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 6982 transitions. Word has length 78 [2021-12-14 17:40:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:31,688 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 6982 transitions. [2021-12-14 17:40:31,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:40:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 6982 transitions. [2021-12-14 17:40:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 17:40:31,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:31,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:31,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 17:40:31,692 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1415994438, now seen corresponding path program 1 times [2021-12-14 17:40:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107083544] [2021-12-14 17:40:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:31,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:40:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:40:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:40:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:40:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:40:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:40:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:40:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:40:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:40:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:40:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 17:40:31,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107083544] [2021-12-14 17:40:31,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107083544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:31,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:31,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:40:31,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992918147] [2021-12-14 17:40:31,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:31,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:40:31,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:31,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:40:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:40:31,891 INFO L87 Difference]: Start difference. First operand 4648 states and 6982 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:40:36,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:40:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:40:41,627 INFO L93 Difference]: Finished difference Result 11680 states and 18036 transitions. [2021-12-14 17:40:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:40:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 82 [2021-12-14 17:40:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:40:41,662 INFO L225 Difference]: With dead ends: 11680 [2021-12-14 17:40:41,662 INFO L226 Difference]: Without dead ends: 7085 [2021-12-14 17:40:41,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:40:41,684 INFO L933 BasicCegarLoop]: 3846 mSDtfsCounter, 3543 mSDsluCounter, 6887 mSDsCounter, 0 mSdLazyCounter, 5492 mSolverCounterSat, 1571 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3890 SdHoareTripleChecker+Valid, 10733 SdHoareTripleChecker+Invalid, 7064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1571 IncrementalHoareTripleChecker+Valid, 5492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:40:41,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3890 Valid, 10733 Invalid, 7064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1571 Valid, 5492 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2021-12-14 17:40:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7085 states. [2021-12-14 17:40:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7085 to 6315. [2021-12-14 17:40:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 5114 states have (on average 1.4892452092295658) internal successors, (7616), 5144 states have internal predecessors, (7616), 1034 states have call successors, (1034), 168 states have call predecessors, (1034), 166 states have return successors, (1033), 1033 states have call predecessors, (1033), 1025 states have call successors, (1033) [2021-12-14 17:40:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9683 transitions. [2021-12-14 17:40:41,956 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9683 transitions. Word has length 82 [2021-12-14 17:40:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:40:41,957 INFO L470 AbstractCegarLoop]: Abstraction has 6315 states and 9683 transitions. [2021-12-14 17:40:41,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:40:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9683 transitions. [2021-12-14 17:40:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 17:40:41,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:40:41,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:40:41,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:40:41,963 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:40:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:40:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1970657750, now seen corresponding path program 1 times [2021-12-14 17:40:41,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:40:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860734437] [2021-12-14 17:40:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:40:41,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:40:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:40:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 17:40:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:40:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:40:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:40:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:40:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:40:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:40:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:40:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:40:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:40:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 17:40:42,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:40:42,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860734437] [2021-12-14 17:40:42,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860734437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:40:42,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:40:42,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:40:42,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387545151] [2021-12-14 17:40:42,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:40:42,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:40:42,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:40:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:40:42,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:40:42,152 INFO L87 Difference]: Start difference. First operand 6315 states and 9683 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)