./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.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-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.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 c0e62a2f55ddaeb08563a2d9bb0bfed8d8d740037b0faa92e9ebf8fe89adc120 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:52:20,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:52:20,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:52:20,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:52:20,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:52:20,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:52:20,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:52:20,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:52:20,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:52:20,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:52:20,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:52:20,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:52:20,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:52:20,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:52:20,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:52:20,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:52:20,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:52:20,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:52:20,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:52:20,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:52:20,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:52:20,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:52:20,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:52:20,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:52:20,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:52:20,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:52:20,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:52:20,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:52:20,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:52:20,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:52:20,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:52:20,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:52:20,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:52:20,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:52:20,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:52:20,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:52:20,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:52:20,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:52:20,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:52:20,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:52:20,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:52:20,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:52:20,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:52:20,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:52:20,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:52:20,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:52:20,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:52:20,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:52:20,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:52:20,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:52:20,211 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:52:20,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:52:20,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:52:20,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:52:20,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:52:20,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:52:20,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:52:20,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:52:20,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:52:20,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:52:20,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:52:20,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:52:20,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:52:20,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:52:20,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:52:20,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:52:20,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:52:20,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0e62a2f55ddaeb08563a2d9bb0bfed8d8d740037b0faa92e9ebf8fe89adc120 [2021-12-14 17:52:20,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:52:20,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:52:20,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:52:20,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:52:20,464 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:52:20,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2021-12-14 17:52:20,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54b5a858/8fd29152ae57488e94a54e197bd748d1/FLAG208e942c7 [2021-12-14 17:52:21,049 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:52:21,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2021-12-14 17:52:21,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54b5a858/8fd29152ae57488e94a54e197bd748d1/FLAG208e942c7 [2021-12-14 17:52:21,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54b5a858/8fd29152ae57488e94a54e197bd748d1 [2021-12-14 17:52:21,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:52:21,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:52:21,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:52:21,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:52:21,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:52:21,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:52:21" (1/1) ... [2021-12-14 17:52:21,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1458e7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:21, skipping insertion in model container [2021-12-14 17:52:21,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:52:21" (1/1) ... [2021-12-14 17:52:21,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:52:21,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:52:21,818 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2021-12-14 17:52:21,819 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2021-12-14 17:52:21,896 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-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2021-12-14 17:52:22,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:52:22,072 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:52:22,115 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2021-12-14 17:52:22,116 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2021-12-14 17:52:22,126 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-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2021-12-14 17:52:22,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:52:22,207 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:52:22,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22 WrapperNode [2021-12-14 17:52:22,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:52:22,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:52:22,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:52:22,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:52:22,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,293 INFO L137 Inliner]: procedures = 114, calls = 288, calls flagged for inlining = 49, calls inlined = 38, statements flattened = 878 [2021-12-14 17:52:22,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:52:22,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:52:22,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:52:22,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:52:22,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:52:22,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:52:22,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:52:22,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:52:22,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (1/1) ... [2021-12-14 17:52:22,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:52:22,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:52:22,378 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 17:52:22,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:52:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure _torture_stop_kthread [2021-12-14 17:52:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure _torture_stop_kthread [2021-12-14 17:52:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_lock [2021-12-14 17:52:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_lock [2021-12-14 17:52:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:52:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:52:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:52:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_delay [2021-12-14 17:52:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_delay [2021-12-14 17:52:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-12-14 17:52:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-12-14 17:52:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:52:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:52:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure _torture_create_kthread [2021-12-14 17:52:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure _torture_create_kthread [2021-12-14 17:52:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_lock [2021-12-14 17:52:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_lock [2021-12-14 17:52:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-14 17:52:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-14 17:52:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:52:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:52:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_spin_write_unlock_irq [2021-12-14 17:52:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_spin_write_unlock_irq [2021-12-14 17:52:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:52:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:52:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:52:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure torture_random [2021-12-14 17:52:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_random [2021-12-14 17:52:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_cleanup [2021-12-14 17:52:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_cleanup [2021-12-14 17:52:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure torture_init_end [2021-12-14 17:52:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_init_end [2021-12-14 17:52:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:52:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:52:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:52:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-12-14 17:52:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-12-14 17:52:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:52:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-14 17:52:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-14 17:52:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:52:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:52:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_stats_print [2021-12-14 17:52:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_stats_print [2021-12-14 17:52:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:52:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-12-14 17:52:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-12-14 17:52:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_lock_irq [2021-12-14 17:52:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_lock_irq [2021-12-14 17:52:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:52:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:52:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_delay [2021-12-14 17:52:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_delay [2021-12-14 17:52:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:52:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:52:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_unlock [2021-12-14 17:52:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_unlock [2021-12-14 17:52:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_print_module_parms [2021-12-14 17:52:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_print_module_parms [2021-12-14 17:52:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:52:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:52:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:52:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_unlock [2021-12-14 17:52:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_unlock [2021-12-14 17:52:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:52:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:52:22,586 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:52:22,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:52:22,684 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:52:23,141 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:52:23,148 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:52:23,148 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:52:23,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:52:23 BoogieIcfgContainer [2021-12-14 17:52:23,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:52:23,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:52:23,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:52:23,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:52:23,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:52:21" (1/3) ... [2021-12-14 17:52:23,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fd35d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:52:23, skipping insertion in model container [2021-12-14 17:52:23,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:52:22" (2/3) ... [2021-12-14 17:52:23,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fd35d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:52:23, skipping insertion in model container [2021-12-14 17:52:23,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:52:23" (3/3) ... [2021-12-14 17:52:23,155 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2021-12-14 17:52:23,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:52:23,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:52:23,190 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:52:23,194 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 17:52:23,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:52:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 258 states have (on average 1.4108527131782946) internal successors, (364), 274 states have internal predecessors, (364), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-14 17:52:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 17:52:23,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:23,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:23,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1909877325, now seen corresponding path program 1 times [2021-12-14 17:52:23,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374295723] [2021-12-14 17:52:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:23,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:23,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:23,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:52:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:23,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:23,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374295723] [2021-12-14 17:52:23,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374295723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:23,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:23,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:52:23,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212752951] [2021-12-14 17:52:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:23,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:52:23,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:52:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:52:23,497 INFO L87 Difference]: Start difference. First operand has 347 states, 258 states have (on average 1.4108527131782946) internal successors, (364), 274 states have internal predecessors, (364), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:52:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:24,106 INFO L93 Difference]: Finished difference Result 1016 states and 1435 transitions. [2021-12-14 17:52:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:52:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-12-14 17:52:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:24,126 INFO L225 Difference]: With dead ends: 1016 [2021-12-14 17:52:24,133 INFO L226 Difference]: Without dead ends: 571 [2021-12-14 17:52:24,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 17:52:24,159 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 595 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:24,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 987 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:52:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-14 17:52:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 524. [2021-12-14 17:52:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 397 states have (on average 1.3778337531486147) internal successors, (547), 408 states have internal predecessors, (547), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2021-12-14 17:52:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 714 transitions. [2021-12-14 17:52:24,327 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 714 transitions. Word has length 45 [2021-12-14 17:52:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 714 transitions. [2021-12-14 17:52:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:52:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 714 transitions. [2021-12-14 17:52:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 17:52:24,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:24,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:24,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:52:24,339 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1822185999, now seen corresponding path program 1 times [2021-12-14 17:52:24,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263350756] [2021-12-14 17:52:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:24,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:24,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:24,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:52:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:24,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263350756] [2021-12-14 17:52:24,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263350756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:24,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:24,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:52:24,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007861993] [2021-12-14 17:52:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:24,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:52:24,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:52:24,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:52:24,527 INFO L87 Difference]: Start difference. First operand 524 states and 714 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:52:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:25,224 INFO L93 Difference]: Finished difference Result 1271 states and 1794 transitions. [2021-12-14 17:52:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:52:25,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-12-14 17:52:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:25,230 INFO L225 Difference]: With dead ends: 1271 [2021-12-14 17:52:25,230 INFO L226 Difference]: Without dead ends: 767 [2021-12-14 17:52:25,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:52:25,232 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 744 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:25,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 1756 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:52:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-14 17:52:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 525. [2021-12-14 17:52:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 398 states have (on average 1.3768844221105527) internal successors, (548), 409 states have internal predecessors, (548), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2021-12-14 17:52:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 715 transitions. [2021-12-14 17:52:25,285 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 715 transitions. Word has length 47 [2021-12-14 17:52:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:25,286 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 715 transitions. [2021-12-14 17:52:25,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:52:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 715 transitions. [2021-12-14 17:52:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 17:52:25,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:25,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:52:25,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash -478636591, now seen corresponding path program 1 times [2021-12-14 17:52:25,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:25,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106116400] [2021-12-14 17:52:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:25,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:52:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:25,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106116400] [2021-12-14 17:52:25,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106116400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:25,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:25,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:52:25,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454784266] [2021-12-14 17:52:25,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:25,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:52:25,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:52:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:52:25,397 INFO L87 Difference]: Start difference. First operand 525 states and 715 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:52:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:25,630 INFO L93 Difference]: Finished difference Result 1074 states and 1473 transitions. [2021-12-14 17:52:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:52:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-12-14 17:52:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:25,633 INFO L225 Difference]: With dead ends: 1074 [2021-12-14 17:52:25,633 INFO L226 Difference]: Without dead ends: 569 [2021-12-14 17:52:25,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 17:52:25,635 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 509 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:25,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 673 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:52:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-12-14 17:52:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 525. [2021-12-14 17:52:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 398 states have (on average 1.3743718592964824) internal successors, (547), 409 states have internal predecessors, (547), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2021-12-14 17:52:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 714 transitions. [2021-12-14 17:52:25,657 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 714 transitions. Word has length 47 [2021-12-14 17:52:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:25,657 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 714 transitions. [2021-12-14 17:52:25,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:52:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 714 transitions. [2021-12-14 17:52:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 17:52:25,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:25,659 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:25,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:52:25,659 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash -457513191, now seen corresponding path program 1 times [2021-12-14 17:52:25,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:25,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461212513] [2021-12-14 17:52:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:25,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:25,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:25,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461212513] [2021-12-14 17:52:25,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461212513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:25,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:25,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:52:25,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500626296] [2021-12-14 17:52:25,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:25,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:52:25,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:25,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:52:25,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:52:25,729 INFO L87 Difference]: Start difference. First operand 525 states and 714 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:52:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:26,226 INFO L93 Difference]: Finished difference Result 1054 states and 1484 transitions. [2021-12-14 17:52:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:52:26,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-12-14 17:52:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:26,230 INFO L225 Difference]: With dead ends: 1054 [2021-12-14 17:52:26,230 INFO L226 Difference]: Without dead ends: 1025 [2021-12-14 17:52:26,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 17:52:26,232 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 617 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:26,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 1015 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:52:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-12-14 17:52:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 932. [2021-12-14 17:52:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 719 states have (on average 1.411682892906815) internal successors, (1015), 743 states have internal predecessors, (1015), 143 states have call successors, (143), 69 states have call predecessors, (143), 69 states have return successors, (147), 131 states have call predecessors, (147), 138 states have call successors, (147) [2021-12-14 17:52:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1305 transitions. [2021-12-14 17:52:26,263 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1305 transitions. Word has length 50 [2021-12-14 17:52:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:26,263 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1305 transitions. [2021-12-14 17:52:26,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:52:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1305 transitions. [2021-12-14 17:52:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 17:52:26,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:26,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-14 17:52:26,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:52:26,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:26,266 INFO L85 PathProgramCache]: Analyzing trace with hash 638272764, now seen corresponding path program 1 times [2021-12-14 17:52:26,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:26,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86665190] [2021-12-14 17:52:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:26,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:52:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:52:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:26,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86665190] [2021-12-14 17:52:26,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86665190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:26,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:26,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:52:26,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757946073] [2021-12-14 17:52:26,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:26,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:52:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:52:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:52:26,336 INFO L87 Difference]: Start difference. First operand 932 states and 1305 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:52:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:27,144 INFO L93 Difference]: Finished difference Result 2764 states and 3873 transitions. [2021-12-14 17:52:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:52:27,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2021-12-14 17:52:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:27,152 INFO L225 Difference]: With dead ends: 2764 [2021-12-14 17:52:27,152 INFO L226 Difference]: Without dead ends: 1852 [2021-12-14 17:52:27,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:52:27,155 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 1016 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:27,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1189 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:52:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-12-14 17:52:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1659. [2021-12-14 17:52:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1288 states have (on average 1.4122670807453417) internal successors, (1819), 1328 states have internal predecessors, (1819), 247 states have call successors, (247), 126 states have call predecessors, (247), 123 states have return successors, (246), 228 states have call predecessors, (246), 242 states have call successors, (246) [2021-12-14 17:52:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2312 transitions. [2021-12-14 17:52:27,216 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2312 transitions. Word has length 65 [2021-12-14 17:52:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:27,216 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 2312 transitions. [2021-12-14 17:52:27,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:52:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2312 transitions. [2021-12-14 17:52:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:52:27,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:27,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-14 17:52:27,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:52:27,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1750010362, now seen corresponding path program 1 times [2021-12-14 17:52:27,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:27,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61142800] [2021-12-14 17:52:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:27,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:52:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:52:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:52:27,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61142800] [2021-12-14 17:52:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61142800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:27,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:27,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:52:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757061995] [2021-12-14 17:52:27,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:52:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:27,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:52:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:52:27,303 INFO L87 Difference]: Start difference. First operand 1659 states and 2312 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:52:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:27,905 INFO L93 Difference]: Finished difference Result 3474 states and 4860 transitions. [2021-12-14 17:52:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:52:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-12-14 17:52:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:27,913 INFO L225 Difference]: With dead ends: 3474 [2021-12-14 17:52:27,913 INFO L226 Difference]: Without dead ends: 1803 [2021-12-14 17:52:27,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:52:27,918 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 434 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:27,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1415 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:52:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-12-14 17:52:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1639. [2021-12-14 17:52:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1272 states have (on average 1.404874213836478) internal successors, (1787), 1312 states have internal predecessors, (1787), 243 states have call successors, (243), 126 states have call predecessors, (243), 123 states have return successors, (242), 224 states have call predecessors, (242), 238 states have call successors, (242) [2021-12-14 17:52:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2272 transitions. [2021-12-14 17:52:27,979 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2272 transitions. Word has length 73 [2021-12-14 17:52:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:27,979 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2272 transitions. [2021-12-14 17:52:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:52:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2272 transitions. [2021-12-14 17:52:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 17:52:27,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:27,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-14 17:52:27,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:52:27,982 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1924223221, now seen corresponding path program 1 times [2021-12-14 17:52:27,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:27,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838126850] [2021-12-14 17:52:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:27,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 17:52:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:52:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:28,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838126850] [2021-12-14 17:52:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838126850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:28,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:28,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:52:28,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045633395] [2021-12-14 17:52:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:28,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:52:28,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:52:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:52:28,086 INFO L87 Difference]: Start difference. First operand 1639 states and 2272 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:52:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:28,781 INFO L93 Difference]: Finished difference Result 4908 states and 6816 transitions. [2021-12-14 17:52:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:52:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2021-12-14 17:52:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:28,794 INFO L225 Difference]: With dead ends: 4908 [2021-12-14 17:52:28,795 INFO L226 Difference]: Without dead ends: 3289 [2021-12-14 17:52:28,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:52:28,800 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 772 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:28,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 1272 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:52:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-12-14 17:52:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2936. [2021-12-14 17:52:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2278 states have (on average 1.3999122036874452) internal successors, (3189), 2354 states have internal predecessors, (3189), 428 states have call successors, (428), 230 states have call predecessors, (428), 229 states have return successors, (431), 395 states have call predecessors, (431), 423 states have call successors, (431) [2021-12-14 17:52:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 4048 transitions. [2021-12-14 17:52:28,924 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 4048 transitions. Word has length 71 [2021-12-14 17:52:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:28,924 INFO L470 AbstractCegarLoop]: Abstraction has 2936 states and 4048 transitions. [2021-12-14 17:52:28,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:52:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 4048 transitions. [2021-12-14 17:52:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-14 17:52:28,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:28,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:28,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:52:28,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1077933097, now seen corresponding path program 1 times [2021-12-14 17:52:28,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:28,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588046446] [2021-12-14 17:52:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:28,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:28,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:52:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:52:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:52:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 17:52:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:29,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:29,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588046446] [2021-12-14 17:52:29,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588046446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:29,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:29,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:52:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347081845] [2021-12-14 17:52:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:29,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:52:29,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:52:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:52:29,061 INFO L87 Difference]: Start difference. First operand 2936 states and 4048 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:29,973 INFO L93 Difference]: Finished difference Result 7847 states and 10900 transitions. [2021-12-14 17:52:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:52:29,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2021-12-14 17:52:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:29,992 INFO L225 Difference]: With dead ends: 7847 [2021-12-14 17:52:29,992 INFO L226 Difference]: Without dead ends: 4931 [2021-12-14 17:52:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:52:29,999 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 1054 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:30,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1646 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:52:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2021-12-14 17:52:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4414. [2021-12-14 17:52:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4414 states, 3444 states have (on average 1.3945993031358885) internal successors, (4803), 3560 states have internal predecessors, (4803), 627 states have call successors, (627), 341 states have call predecessors, (627), 342 states have return successors, (634), 580 states have call predecessors, (634), 622 states have call successors, (634) [2021-12-14 17:52:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4414 states to 4414 states and 6064 transitions. [2021-12-14 17:52:30,179 INFO L78 Accepts]: Start accepts. Automaton has 4414 states and 6064 transitions. Word has length 117 [2021-12-14 17:52:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:30,179 INFO L470 AbstractCegarLoop]: Abstraction has 4414 states and 6064 transitions. [2021-12-14 17:52:30,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4414 states and 6064 transitions. [2021-12-14 17:52:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 17:52:30,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:30,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:30,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:52:30,184 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1717722878, now seen corresponding path program 1 times [2021-12-14 17:52:30,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791965889] [2021-12-14 17:52:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:30,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:52:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:52:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:52:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:52:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:52:30,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791965889] [2021-12-14 17:52:30,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791965889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:30,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:30,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:52:30,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45896458] [2021-12-14 17:52:30,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:30,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:52:30,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:52:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:52:30,289 INFO L87 Difference]: Start difference. First operand 4414 states and 6064 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:31,222 INFO L93 Difference]: Finished difference Result 11777 states and 16307 transitions. [2021-12-14 17:52:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:52:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2021-12-14 17:52:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:31,250 INFO L225 Difference]: With dead ends: 11777 [2021-12-14 17:52:31,250 INFO L226 Difference]: Without dead ends: 7383 [2021-12-14 17:52:31,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:52:31,262 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 813 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:31,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1904 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:52:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-12-14 17:52:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 6624. [2021-12-14 17:52:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 5195 states have (on average 1.3897978825794033) internal successors, (7220), 5371 states have internal predecessors, (7220), 918 states have call successors, (918), 506 states have call predecessors, (918), 510 states have return successors, (931), 850 states have call predecessors, (931), 913 states have call successors, (931) [2021-12-14 17:52:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 9069 transitions. [2021-12-14 17:52:31,500 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 9069 transitions. Word has length 123 [2021-12-14 17:52:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:31,500 INFO L470 AbstractCegarLoop]: Abstraction has 6624 states and 9069 transitions. [2021-12-14 17:52:31,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 9069 transitions. [2021-12-14 17:52:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-14 17:52:31,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:31,506 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:31,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 17:52:31,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash 723546157, now seen corresponding path program 1 times [2021-12-14 17:52:31,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:31,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966113232] [2021-12-14 17:52:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:31,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:52:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:52:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:52:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 17:52:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:52:31,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966113232] [2021-12-14 17:52:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966113232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:52:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673919300] [2021-12-14 17:52:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:31,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:52:31,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:52:31,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:52:31,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:52:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:31,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 17:52:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:52:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 17:52:32,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:52:32,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673919300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:32,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:52:32,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-14 17:52:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303226773] [2021-12-14 17:52:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:32,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:52:32,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:32,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:52:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:52:32,135 INFO L87 Difference]: Start difference. First operand 6624 states and 9069 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:52:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:32,384 INFO L93 Difference]: Finished difference Result 13336 states and 18277 transitions. [2021-12-14 17:52:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:52:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 127 [2021-12-14 17:52:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:32,405 INFO L225 Difference]: With dead ends: 13336 [2021-12-14 17:52:32,405 INFO L226 Difference]: Without dead ends: 6606 [2021-12-14 17:52:32,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:52:32,416 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 6 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:32,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1767 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:52:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6606 states. [2021-12-14 17:52:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 6606. [2021-12-14 17:52:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6606 states, 5159 states have (on average 1.3855398333010274) internal successors, (7148), 5344 states have internal predecessors, (7148), 936 states have call successors, (936), 506 states have call predecessors, (936), 510 states have return successors, (940), 859 states have call predecessors, (940), 922 states have call successors, (940) [2021-12-14 17:52:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 9024 transitions. [2021-12-14 17:52:32,598 INFO L78 Accepts]: Start accepts. Automaton has 6606 states and 9024 transitions. Word has length 127 [2021-12-14 17:52:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:32,598 INFO L470 AbstractCegarLoop]: Abstraction has 6606 states and 9024 transitions. [2021-12-14 17:52:32,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:52:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6606 states and 9024 transitions. [2021-12-14 17:52:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 17:52:32,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:32,603 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:32,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:52:32,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:52:32,819 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1165331384, now seen corresponding path program 1 times [2021-12-14 17:52:32,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:32,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133628192] [2021-12-14 17:52:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:32,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:52:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:52:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:52:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 17:52:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 17:52:32,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:32,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133628192] [2021-12-14 17:52:32,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133628192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:32,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:32,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:52:32,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404760585] [2021-12-14 17:52:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:32,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:52:32,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:52:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:52:32,962 INFO L87 Difference]: Start difference. First operand 6606 states and 9024 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:52:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:33,648 INFO L93 Difference]: Finished difference Result 13880 states and 19040 transitions. [2021-12-14 17:52:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:52:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 129 [2021-12-14 17:52:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:33,673 INFO L225 Difference]: With dead ends: 13880 [2021-12-14 17:52:33,674 INFO L226 Difference]: Without dead ends: 7294 [2021-12-14 17:52:33,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:52:33,687 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 721 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:33,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1216 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:52:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2021-12-14 17:52:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 6570. [2021-12-14 17:52:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 5123 states have (on average 1.3812219402693735) internal successors, (7076), 5308 states have internal predecessors, (7076), 936 states have call successors, (936), 506 states have call predecessors, (936), 510 states have return successors, (940), 859 states have call predecessors, (940), 922 states have call successors, (940) [2021-12-14 17:52:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 8952 transitions. [2021-12-14 17:52:33,927 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 8952 transitions. Word has length 129 [2021-12-14 17:52:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:33,927 INFO L470 AbstractCegarLoop]: Abstraction has 6570 states and 8952 transitions. [2021-12-14 17:52:33,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:52:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 8952 transitions. [2021-12-14 17:52:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 17:52:33,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:33,933 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:33,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:52:33,934 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash -985966780, now seen corresponding path program 1 times [2021-12-14 17:52:33,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:33,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779428760] [2021-12-14 17:52:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:33,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:52:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:52:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:52:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:52:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:52:34,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:34,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779428760] [2021-12-14 17:52:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779428760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:52:34,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133144978] [2021-12-14 17:52:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:34,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:52:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:52:34,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:52:34,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:52:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:52:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:52:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:52:34,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:52:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133144978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:34,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:52:34,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-12-14 17:52:34,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561418245] [2021-12-14 17:52:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:34,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:52:34,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:34,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:52:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:52:34,500 INFO L87 Difference]: Start difference. First operand 6570 states and 8952 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:52:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:35,007 INFO L93 Difference]: Finished difference Result 19649 states and 26785 transitions. [2021-12-14 17:52:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:52:35,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 130 [2021-12-14 17:52:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:35,058 INFO L225 Difference]: With dead ends: 19649 [2021-12-14 17:52:35,058 INFO L226 Difference]: Without dead ends: 19622 [2021-12-14 17:52:35,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:52:35,068 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 774 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:35,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1682 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:52:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19622 states. [2021-12-14 17:52:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19622 to 19472. [2021-12-14 17:52:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19472 states, 15165 states have (on average 1.3853610286844709) internal successors, (21009), 15720 states have internal predecessors, (21009), 2784 states have call successors, (2784), 1500 states have call predecessors, (2784), 1522 states have return successors, (2806), 2563 states have call predecessors, (2806), 2752 states have call successors, (2806) [2021-12-14 17:52:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19472 states to 19472 states and 26599 transitions. [2021-12-14 17:52:35,737 INFO L78 Accepts]: Start accepts. Automaton has 19472 states and 26599 transitions. Word has length 130 [2021-12-14 17:52:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:35,737 INFO L470 AbstractCegarLoop]: Abstraction has 19472 states and 26599 transitions. [2021-12-14 17:52:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:52:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19472 states and 26599 transitions. [2021-12-14 17:52:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 17:52:35,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:35,753 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 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] [2021-12-14 17:52:35,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:52:35,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 17:52:35,971 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1089963992, now seen corresponding path program 1 times [2021-12-14 17:52:35,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:35,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578698184] [2021-12-14 17:52:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:35,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:52:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:52:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:52:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:52:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 17:52:36,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578698184] [2021-12-14 17:52:36,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578698184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:36,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:36,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:52:36,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832403735] [2021-12-14 17:52:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:36,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:52:36,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:52:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:52:36,121 INFO L87 Difference]: Start difference. First operand 19472 states and 26599 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:52:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:37,095 INFO L93 Difference]: Finished difference Result 26068 states and 35801 transitions. [2021-12-14 17:52:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:52:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 135 [2021-12-14 17:52:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:37,111 INFO L225 Difference]: With dead ends: 26068 [2021-12-14 17:52:37,111 INFO L226 Difference]: Without dead ends: 6429 [2021-12-14 17:52:37,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:52:37,141 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 867 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:37,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 1176 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:52:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2021-12-14 17:52:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 6299. [2021-12-14 17:52:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 5043 states have (on average 1.403926234384295) internal successors, (7080), 5166 states have internal predecessors, (7080), 795 states have call successors, (795), 465 states have call predecessors, (795), 460 states have return successors, (790), 775 states have call predecessors, (790), 790 states have call successors, (790) [2021-12-14 17:52:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 8665 transitions. [2021-12-14 17:52:37,326 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 8665 transitions. Word has length 135 [2021-12-14 17:52:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:37,327 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 8665 transitions. [2021-12-14 17:52:37,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:52:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 8665 transitions. [2021-12-14 17:52:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-14 17:52:37,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:37,338 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:37,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 17:52:37,339 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash 862404707, now seen corresponding path program 1 times [2021-12-14 17:52:37,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:37,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482587401] [2021-12-14 17:52:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:37,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:52:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:52:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:52:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:52:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:52:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-14 17:52:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 17:52:37,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:37,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482587401] [2021-12-14 17:52:37,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482587401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:37,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:37,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:52:37,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680905589] [2021-12-14 17:52:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:37,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:52:37,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:52:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:52:37,489 INFO L87 Difference]: Start difference. First operand 6299 states and 8665 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:38,422 INFO L93 Difference]: Finished difference Result 16405 states and 23360 transitions. [2021-12-14 17:52:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:52:38,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 139 [2021-12-14 17:52:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:38,449 INFO L225 Difference]: With dead ends: 16405 [2021-12-14 17:52:38,449 INFO L226 Difference]: Without dead ends: 10126 [2021-12-14 17:52:38,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:52:38,462 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 671 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:38,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 1736 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:52:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10126 states. [2021-12-14 17:52:38,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10126 to 6302. [2021-12-14 17:52:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 5046 states have (on average 1.4036860879904876) internal successors, (7083), 5169 states have internal predecessors, (7083), 795 states have call successors, (795), 465 states have call predecessors, (795), 460 states have return successors, (790), 775 states have call predecessors, (790), 790 states have call successors, (790) [2021-12-14 17:52:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 8668 transitions. [2021-12-14 17:52:38,730 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 8668 transitions. Word has length 139 [2021-12-14 17:52:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:38,731 INFO L470 AbstractCegarLoop]: Abstraction has 6302 states and 8668 transitions. [2021-12-14 17:52:38,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 8668 transitions. [2021-12-14 17:52:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 17:52:38,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:52:38,740 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 17:52:38,740 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:52:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:52:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -460523326, now seen corresponding path program 1 times [2021-12-14 17:52:38,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:52:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710181974] [2021-12-14 17:52:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:52:38,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:52:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:52:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:52:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:52:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:52:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:52:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:52:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:52:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:52:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:52:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:52:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-14 17:52:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:52:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 17:52:38,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:52:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710181974] [2021-12-14 17:52:38,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710181974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:52:38,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:52:38,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:52:38,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516360385] [2021-12-14 17:52:38,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:52:38,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:52:38,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:52:38,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:52:38,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:52:38,882 INFO L87 Difference]: Start difference. First operand 6302 states and 8668 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 7 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:52:39,563 INFO L93 Difference]: Finished difference Result 6983 states and 9558 transitions. [2021-12-14 17:52:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:52:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 7 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 141 [2021-12-14 17:52:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:52:39,564 INFO L225 Difference]: With dead ends: 6983 [2021-12-14 17:52:39,564 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 17:52:39,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:52:39,571 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 610 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:52:39,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 734 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:52:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 17:52:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 17:52:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 17:52:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 17:52:39,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 141 [2021-12-14 17:52:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:52:39,572 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 17:52:39,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 7 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:52:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 17:52:39,572 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 17:52:39,574 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 17:52:39,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 17:52:39,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.