./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.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 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:47:22,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:47:22,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:47:22,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:47:22,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:47:22,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:47:22,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:47:22,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:47:22,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:47:22,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:47:22,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:47:22,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:47:22,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:47:22,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:47:22,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:47:22,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:47:22,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:47:22,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:47:22,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:47:22,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:47:22,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:47:22,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:47:22,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:47:22,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:47:22,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:47:22,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:47:22,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:47:22,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:47:22,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:47:22,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:47:22,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:47:22,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:47:22,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:47:22,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:47:22,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:47:22,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:47:22,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:47:22,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:47:22,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:47:22,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:47:22,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:47:22,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:47:22,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:47:22,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:47:22,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:47:22,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:47:22,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:47:22,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:47:22,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:47:22,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:47:22,509 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:47:22,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:47:22,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:47:22,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:47:22,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:47:22,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:47:22,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:47:22,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:47:22,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:47:22,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:47:22,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:47:22,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:47:22,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:47:22,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:47:22,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:47:22,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:47:22,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:47:22,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:47:22,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:47:22,513 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:47:22,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:47:22,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:47:22,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:47:22,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e [2021-12-22 14:47:22,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:47:22,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:47:22,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:47:22,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:47:22,714 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:47:22,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-12-22 14:47:22,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75de5ae42/8f2b033402f44b4381562a50d6655236/FLAG97781fd8d [2021-12-22 14:47:23,358 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:47:23,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-12-22 14:47:23,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75de5ae42/8f2b033402f44b4381562a50d6655236/FLAG97781fd8d [2021-12-22 14:47:23,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75de5ae42/8f2b033402f44b4381562a50d6655236 [2021-12-22 14:47:23,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:47:23,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:47:23,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:47:23,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:47:23,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:47:23,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:47:23" (1/1) ... [2021-12-22 14:47:23,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf1ba12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:23, skipping insertion in model container [2021-12-22 14:47:23,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:47:23" (1/1) ... [2021-12-22 14:47:23,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:47:23,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:47:24,349 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-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-12-22 14:47:24,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:47:24,792 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:47:24,838 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-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-12-22 14:47:24,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:47:24,993 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:47:24,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24 WrapperNode [2021-12-22 14:47:24,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:47:24,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:47:24,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:47:24,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:47:25,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,143 INFO L137 Inliner]: procedures = 184, calls = 828, calls flagged for inlining = 92, calls inlined = 90, statements flattened = 3179 [2021-12-22 14:47:25,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:47:25,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:47:25,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:47:25,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:47:25,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:47:25,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:47:25,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:47:25,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:47:25,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (1/1) ... [2021-12-22 14:47:25,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:47:25,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:47:25,316 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) [2021-12-22 14:47:25,322 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 [2021-12-22 14:47:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-12-22 14:47:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-12-22 14:47:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure sl_tx_timeout [2021-12-22 14:47:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_tx_timeout [2021-12-22 14:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-12-22 14:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2021-12-22 14:47:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2021-12-22 14:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:47:25,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:47:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:47:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-22 14:47:25,345 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-22 14:47:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-12-22 14:47:25,345 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-12-22 14:47:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure slhc_free [2021-12-22 14:47:25,345 INFO L138 BoogieDeclarations]: Found implementation of procedure slhc_free [2021-12-22 14:47:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:47:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:47:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-22 14:47:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-22 14:47:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:47:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:47:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-22 14:47:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-22 14:47:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-12-22 14:47:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-12-22 14:47:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:47:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:47:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure sl_free_bufs [2021-12-22 14:47:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_free_bufs [2021-12-22 14:47:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:47:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:47:25,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:47:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:47:25,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:47:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-22 14:47:25,348 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-22 14:47:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:47:25,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:47:25,349 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-22 14:47:25,349 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-22 14:47:25,349 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-22 14:47:25,349 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-22 14:47:25,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:47:25,350 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-12-22 14:47:25,350 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-12-22 14:47:25,350 INFO L130 BoogieDeclarations]: Found specification of procedure sl_bump [2021-12-22 14:47:25,350 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_bump [2021-12-22 14:47:25,350 INFO L130 BoogieDeclarations]: Found specification of procedure slip_ioctl [2021-12-22 14:47:25,350 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_ioctl [2021-12-22 14:47:25,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:47:25,351 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-12-22 14:47:25,351 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-12-22 14:47:25,351 INFO L130 BoogieDeclarations]: Found specification of procedure slip_close [2021-12-22 14:47:25,352 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_close [2021-12-22 14:47:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:47:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:47:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-22 14:47:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-12-22 14:47:25,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-12-22 14:47:25,353 INFO L130 BoogieDeclarations]: Found specification of procedure slip_compat_ioctl [2021-12-22 14:47:25,353 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_compat_ioctl [2021-12-22 14:47:25,353 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-12-22 14:47:25,353 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-12-22 14:47:25,353 INFO L130 BoogieDeclarations]: Found specification of procedure sl_get_stats64 [2021-12-22 14:47:25,353 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_get_stats64 [2021-12-22 14:47:25,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:47:25,354 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-22 14:47:25,354 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-22 14:47:25,354 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-22 14:47:25,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-22 14:47:25,354 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-12-22 14:47:25,355 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-12-22 14:47:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure sl_ioctl [2021-12-22 14:47:25,355 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_ioctl [2021-12-22 14:47:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hangup [2021-12-22 14:47:25,355 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hangup [2021-12-22 14:47:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:47:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-12-22 14:47:25,355 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-12-22 14:47:25,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:47:25,356 INFO L130 BoogieDeclarations]: Found specification of procedure tty_devnum [2021-12-22 14:47:25,356 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_devnum [2021-12-22 14:47:25,356 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-22 14:47:25,356 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-22 14:47:25,356 INFO L130 BoogieDeclarations]: Found specification of procedure slip_hangup [2021-12-22 14:47:25,357 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_hangup [2021-12-22 14:47:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-22 14:47:25,357 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-22 14:47:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-22 14:47:25,357 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-22 14:47:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure sl_change_mtu [2021-12-22 14:47:25,358 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_change_mtu [2021-12-22 14:47:25,358 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-12-22 14:47:25,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-12-22 14:47:25,358 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-22 14:47:25,358 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-22 14:47:25,359 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-22 14:47:25,359 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-22 14:47:25,359 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-22 14:47:25,359 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-22 14:47:25,359 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-22 14:47:25,359 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-22 14:47:25,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:47:25,360 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-22 14:47:25,360 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-22 14:47:25,360 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-12-22 14:47:25,360 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-12-22 14:47:25,360 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-12-22 14:47:25,361 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-12-22 14:47:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:47:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:47:25,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:47:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:47:25,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:47:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure sl_unlock [2021-12-22 14:47:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_unlock [2021-12-22 14:47:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-22 14:47:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-22 14:47:25,805 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:47:25,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:47:25,954 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:47:27,623 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:47:27,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:47:27,641 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:47:27,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:47:27 BoogieIcfgContainer [2021-12-22 14:47:27,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:47:27,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:47:27,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:47:27,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:47:27,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:47:23" (1/3) ... [2021-12-22 14:47:27,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b33d8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:47:27, skipping insertion in model container [2021-12-22 14:47:27,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:47:24" (2/3) ... [2021-12-22 14:47:27,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b33d8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:47:27, skipping insertion in model container [2021-12-22 14:47:27,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:47:27" (3/3) ... [2021-12-22 14:47:27,655 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-12-22 14:47:27,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:47:27,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:47:27,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:47:27,717 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 [2021-12-22 14:47:27,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:47:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 1086 states, 804 states have (on average 1.4291044776119404) internal successors, (1149), 837 states have internal predecessors, (1149), 229 states have call successors, (229), 52 states have call predecessors, (229), 51 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) [2021-12-22 14:47:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 14:47:27,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:27,777 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:47:27,777 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:27,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1674136558, now seen corresponding path program 1 times [2021-12-22 14:47:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:27,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525344593] [2021-12-22 14:47:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:27,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 14:47:28,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525344593] [2021-12-22 14:47:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525344593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:28,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:28,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:47:28,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386438948] [2021-12-22 14:47:28,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:28,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:47:28,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:47:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:47:28,201 INFO L87 Difference]: Start difference. First operand has 1086 states, 804 states have (on average 1.4291044776119404) internal successors, (1149), 837 states have internal predecessors, (1149), 229 states have call successors, (229), 52 states have call predecessors, (229), 51 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 14:47:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:31,834 INFO L93 Difference]: Finished difference Result 2922 states and 4363 transitions. [2021-12-22 14:47:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:47:31,836 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 63 [2021-12-22 14:47:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:31,868 INFO L225 Difference]: With dead ends: 2922 [2021-12-22 14:47:31,869 INFO L226 Difference]: Without dead ends: 1756 [2021-12-22 14:47:31,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:47:31,881 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 1443 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 3441 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:31,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 3441 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 14:47:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-12-22 14:47:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1600. [2021-12-22 14:47:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1178 states have (on average 1.403225806451613) internal successors, (1653), 1211 states have internal predecessors, (1653), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-22 14:47:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2318 transitions. [2021-12-22 14:47:32,017 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2318 transitions. Word has length 63 [2021-12-22 14:47:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:32,018 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2318 transitions. [2021-12-22 14:47:32,018 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 14:47:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2318 transitions. [2021-12-22 14:47:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 14:47:32,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:32,025 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-22 14:47:32,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:47:32,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2079290676, now seen corresponding path program 1 times [2021-12-22 14:47:32,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:32,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137911540] [2021-12-22 14:47:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:32,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:47:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:47:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 14:47:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 14:47:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-22 14:47:32,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137911540] [2021-12-22 14:47:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137911540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:32,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:32,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:47:32,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189191820] [2021-12-22 14:47:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:32,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:47:32,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:47:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:47:32,176 INFO L87 Difference]: Start difference. First operand 1600 states and 2318 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 14:47:33,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:47:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:35,255 INFO L93 Difference]: Finished difference Result 3366 states and 4935 transitions. [2021-12-22 14:47:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:47:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-12-22 14:47:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:35,265 INFO L225 Difference]: With dead ends: 3366 [2021-12-22 14:47:35,265 INFO L226 Difference]: Without dead ends: 1790 [2021-12-22 14:47:35,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:47:35,271 INFO L933 BasicCegarLoop]: 1471 mSDtfsCounter, 2268 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:35,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 2069 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 14:47:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-12-22 14:47:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1600. [2021-12-22 14:47:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1178 states have (on average 1.401528013582343) internal successors, (1651), 1211 states have internal predecessors, (1651), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-22 14:47:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2316 transitions. [2021-12-22 14:47:35,329 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2316 transitions. Word has length 104 [2021-12-22 14:47:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:35,330 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2316 transitions. [2021-12-22 14:47:35,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 14:47:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2316 transitions. [2021-12-22 14:47:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 14:47:35,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:35,333 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-22 14:47:35,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:47:35,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash 187090510, now seen corresponding path program 1 times [2021-12-22 14:47:35,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605773105] [2021-12-22 14:47:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:35,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:47:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:47:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 14:47:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 14:47:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-22 14:47:35,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605773105] [2021-12-22 14:47:35,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605773105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:35,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:35,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:47:35,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012289673] [2021-12-22 14:47:35,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:35,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:47:35,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:47:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:47:35,484 INFO L87 Difference]: Start difference. First operand 1600 states and 2316 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 14:47:37,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:47:38,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:47:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:40,333 INFO L93 Difference]: Finished difference Result 3370 states and 4935 transitions. [2021-12-22 14:47:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:47:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-12-22 14:47:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:40,341 INFO L225 Difference]: With dead ends: 3370 [2021-12-22 14:47:40,342 INFO L226 Difference]: Without dead ends: 1790 [2021-12-22 14:47:40,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:47:40,351 INFO L933 BasicCegarLoop]: 1478 mSDtfsCounter, 1008 mSDsluCounter, 2748 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:40,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 4226 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-22 14:47:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-12-22 14:47:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1600. [2021-12-22 14:47:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1178 states have (on average 1.399830220713073) internal successors, (1649), 1211 states have internal predecessors, (1649), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-22 14:47:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2314 transitions. [2021-12-22 14:47:40,405 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2314 transitions. Word has length 104 [2021-12-22 14:47:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:40,406 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2314 transitions. [2021-12-22 14:47:40,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 14:47:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2314 transitions. [2021-12-22 14:47:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 14:47:40,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:40,410 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-22 14:47:40,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:47:40,410 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -540695394, now seen corresponding path program 1 times [2021-12-22 14:47:40,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:40,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563086007] [2021-12-22 14:47:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:40,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:47:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:47:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:47:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:47:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-22 14:47:40,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563086007] [2021-12-22 14:47:40,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563086007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:40,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:40,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:47:40,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719070449] [2021-12-22 14:47:40,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:40,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:47:40,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:47:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:47:40,562 INFO L87 Difference]: Start difference. First operand 1600 states and 2314 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-22 14:47:41,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:47:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:45,020 INFO L93 Difference]: Finished difference Result 2381 states and 3634 transitions. [2021-12-22 14:47:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:47:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 107 [2021-12-22 14:47:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:45,036 INFO L225 Difference]: With dead ends: 2381 [2021-12-22 14:47:45,036 INFO L226 Difference]: Without dead ends: 2378 [2021-12-22 14:47:45,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:47:45,038 INFO L933 BasicCegarLoop]: 2112 mSDtfsCounter, 1343 mSDsluCounter, 4428 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 6540 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:45,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 6540 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-22 14:47:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-12-22 14:47:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1602. [2021-12-22 14:47:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1180 states have (on average 1.3991525423728814) internal successors, (1651), 1213 states have internal predecessors, (1651), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-22 14:47:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2316 transitions. [2021-12-22 14:47:45,109 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2316 transitions. Word has length 107 [2021-12-22 14:47:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:45,109 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 2316 transitions. [2021-12-22 14:47:45,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-22 14:47:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2316 transitions. [2021-12-22 14:47:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-22 14:47:45,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:45,113 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-22 14:47:45,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:47:45,114 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash -756513172, now seen corresponding path program 1 times [2021-12-22 14:47:45,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:45,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320229933] [2021-12-22 14:47:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:45,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:47:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:47:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:47:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:47:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 14:47:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-22 14:47:45,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320229933] [2021-12-22 14:47:45,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320229933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:45,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:45,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:47:45,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170415194] [2021-12-22 14:47:45,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:45,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:47:45,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:47:45,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:47:45,294 INFO L87 Difference]: Start difference. First operand 1602 states and 2316 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 14:47:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:48,966 INFO L93 Difference]: Finished difference Result 3959 states and 5919 transitions. [2021-12-22 14:47:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:47:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 117 [2021-12-22 14:47:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:48,976 INFO L225 Difference]: With dead ends: 3959 [2021-12-22 14:47:48,976 INFO L226 Difference]: Without dead ends: 2381 [2021-12-22 14:47:48,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:47:48,981 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 2436 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 4178 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:48,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2693 Valid, 4178 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-22 14:47:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-12-22 14:47:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1603. [2021-12-22 14:47:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1181 states have (on average 1.3988145639288738) internal successors, (1652), 1214 states have internal predecessors, (1652), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-22 14:47:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2317 transitions. [2021-12-22 14:47:49,036 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2317 transitions. Word has length 117 [2021-12-22 14:47:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:49,037 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 2317 transitions. [2021-12-22 14:47:49,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 14:47:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2317 transitions. [2021-12-22 14:47:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 14:47:49,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:49,041 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-22 14:47:49,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:47:49,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1902158187, now seen corresponding path program 1 times [2021-12-22 14:47:49,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:49,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988728980] [2021-12-22 14:47:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:49,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:47:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:47:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:47:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:47:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:47:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-22 14:47:49,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988728980] [2021-12-22 14:47:49,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988728980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:49,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:49,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:47:49,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743283876] [2021-12-22 14:47:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:49,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:47:49,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:47:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:47:49,177 INFO L87 Difference]: Start difference. First operand 1603 states and 2317 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 14:47:52,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:47:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:55,777 INFO L93 Difference]: Finished difference Result 3313 states and 5203 transitions. [2021-12-22 14:47:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 14:47:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-12-22 14:47:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:55,793 INFO L225 Difference]: With dead ends: 3313 [2021-12-22 14:47:55,793 INFO L226 Difference]: Without dead ends: 3310 [2021-12-22 14:47:55,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-22 14:47:55,796 INFO L933 BasicCegarLoop]: 2556 mSDtfsCounter, 2187 mSDsluCounter, 7216 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 804 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 9772 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:55,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2403 Valid, 9772 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 3039 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-12-22 14:47:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-12-22 14:47:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1605. [2021-12-22 14:47:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1182 states have (on average 1.398477157360406) internal successors, (1653), 1214 states have internal predecessors, (1653), 334 states have call successors, (334), 89 states have call predecessors, (334), 88 states have return successors, (333), 330 states have call predecessors, (333), 333 states have call successors, (333) [2021-12-22 14:47:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2320 transitions. [2021-12-22 14:47:55,885 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2320 transitions. Word has length 119 [2021-12-22 14:47:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:55,885 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 2320 transitions. [2021-12-22 14:47:55,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 14:47:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2320 transitions. [2021-12-22 14:47:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-22 14:47:55,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:55,891 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:47:55,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 14:47:55,891 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 647562230, now seen corresponding path program 1 times [2021-12-22 14:47:55,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5560588] [2021-12-22 14:47:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:55,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:47:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:55,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:47:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:55,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:47:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:47:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:47:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:47:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:47:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:47:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:47:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:47:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:47:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:47:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:47:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 14:47:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 14:47:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 14:47:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 14:47:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:47:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-22 14:47:56,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:47:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5560588] [2021-12-22 14:47:56,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5560588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:47:56,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:47:56,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:47:56,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081226100] [2021-12-22 14:47:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:47:56,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:47:56,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:47:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:47:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:47:56,065 INFO L87 Difference]: Start difference. First operand 1605 states and 2320 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-22 14:47:58,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:47:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:47:59,869 INFO L93 Difference]: Finished difference Result 3997 states and 5839 transitions. [2021-12-22 14:47:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:47:59,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 149 [2021-12-22 14:47:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:47:59,879 INFO L225 Difference]: With dead ends: 3997 [2021-12-22 14:47:59,880 INFO L226 Difference]: Without dead ends: 2416 [2021-12-22 14:47:59,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:47:59,884 INFO L933 BasicCegarLoop]: 2200 mSDtfsCounter, 2289 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 885 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2473 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-22 14:47:59,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2473 Valid, 3662 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 1037 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-12-22 14:47:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-12-22 14:47:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2140. [2021-12-22 14:47:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 1567 states have (on average 1.391193363114231) internal successors, (2180), 1608 states have internal predecessors, (2180), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-22 14:47:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 3075 transitions. [2021-12-22 14:47:59,976 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 3075 transitions. Word has length 149 [2021-12-22 14:47:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:47:59,977 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 3075 transitions. [2021-12-22 14:47:59,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-22 14:47:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 3075 transitions. [2021-12-22 14:47:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 14:47:59,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:47:59,985 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:47:59,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 14:47:59,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:47:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:47:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -713832836, now seen corresponding path program 1 times [2021-12-22 14:47:59,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:47:59,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255913938] [2021-12-22 14:47:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:47:59,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:48:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:48:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:48:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:48:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:48:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:48:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:48:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:48:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:48:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:48:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:48:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:48:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:48:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 14:48:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 14:48:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 14:48:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-22 14:48:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-22 14:48:00,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:48:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255913938] [2021-12-22 14:48:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255913938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:48:00,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:48:00,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:48:00,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571013187] [2021-12-22 14:48:00,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:48:00,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:48:00,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:48:00,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:48:00,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:48:00,185 INFO L87 Difference]: Start difference. First operand 2140 states and 3075 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-22 14:48:02,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:48:04,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:48:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:48:05,765 INFO L93 Difference]: Finished difference Result 4583 states and 6821 transitions. [2021-12-22 14:48:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:48:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 151 [2021-12-22 14:48:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:48:05,779 INFO L225 Difference]: With dead ends: 4583 [2021-12-22 14:48:05,780 INFO L226 Difference]: Without dead ends: 3002 [2021-12-22 14:48:05,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:48:05,809 INFO L933 BasicCegarLoop]: 2017 mSDtfsCounter, 2724 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2974 SdHoareTripleChecker+Valid, 3755 SdHoareTripleChecker+Invalid, 2697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:48:05,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2974 Valid, 3755 Invalid, 2697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-22 14:48:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-12-22 14:48:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2144. [2021-12-22 14:48:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1571 states have (on average 1.3908338637810311) internal successors, (2185), 1612 states have internal predecessors, (2185), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-22 14:48:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3080 transitions. [2021-12-22 14:48:05,916 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3080 transitions. Word has length 151 [2021-12-22 14:48:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:48:05,916 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3080 transitions. [2021-12-22 14:48:05,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-22 14:48:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3080 transitions. [2021-12-22 14:48:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-22 14:48:05,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:48:05,926 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:48:05,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 14:48:05,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:48:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:48:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash -134166477, now seen corresponding path program 1 times [2021-12-22 14:48:05,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:48:05,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125775737] [2021-12-22 14:48:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:05,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:48:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:05,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:48:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:48:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:48:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:48:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:48:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:48:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:48:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:48:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:48:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:48:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:48:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:48:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 14:48:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-22 14:48:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-22 14:48:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 14:48:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-22 14:48:06,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:48:06,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125775737] [2021-12-22 14:48:06,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125775737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:48:06,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:48:06,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:48:06,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888958809] [2021-12-22 14:48:06,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:48:06,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:48:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:48:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:48:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:48:06,076 INFO L87 Difference]: Start difference. First operand 2144 states and 3080 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:48:09,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:48:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:48:10,091 INFO L93 Difference]: Finished difference Result 4538 states and 6632 transitions. [2021-12-22 14:48:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:48:10,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-12-22 14:48:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:48:10,100 INFO L225 Difference]: With dead ends: 4538 [2021-12-22 14:48:10,101 INFO L226 Difference]: Without dead ends: 2418 [2021-12-22 14:48:10,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:48:10,107 INFO L933 BasicCegarLoop]: 1474 mSDtfsCounter, 995 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 3153 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:48:10,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 3153 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-22 14:48:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-12-22 14:48:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2144. [2021-12-22 14:48:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1571 states have (on average 1.3851050286441757) internal successors, (2176), 1612 states have internal predecessors, (2176), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-22 14:48:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3071 transitions. [2021-12-22 14:48:10,203 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3071 transitions. Word has length 154 [2021-12-22 14:48:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:48:10,203 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3071 transitions. [2021-12-22 14:48:10,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:48:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3071 transitions. [2021-12-22 14:48:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 14:48:10,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:48:10,211 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:48:10,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 14:48:10,211 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:48:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:48:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -394171254, now seen corresponding path program 1 times [2021-12-22 14:48:10,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:48:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525902966] [2021-12-22 14:48:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:10,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:48:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:48:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:48:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:48:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:48:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:48:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:48:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:48:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:48:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:48:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:48:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:48:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:48:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 14:48:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-22 14:48:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 14:48:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-22 14:48:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-22 14:48:10,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:48:10,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525902966] [2021-12-22 14:48:10,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525902966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:48:10,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059318298] [2021-12-22 14:48:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:10,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:48:10,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:48:10,436 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) [2021-12-22 14:48:10,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:48:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:48:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:48:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-22 14:48:11,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:48:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-22 14:48:11,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059318298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:48:11,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:48:11,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 5] total 12 [2021-12-22 14:48:11,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100953824] [2021-12-22 14:48:11,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:48:11,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 14:48:11,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:48:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 14:48:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:48:11,382 INFO L87 Difference]: Start difference. First operand 2144 states and 3071 transitions. Second operand has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 10 states have internal predecessors, (185), 4 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-12-22 14:48:14,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:48:15,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:48:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:48:18,859 INFO L93 Difference]: Finished difference Result 6337 states and 9744 transitions. [2021-12-22 14:48:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:48:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 10 states have internal predecessors, (185), 4 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 157 [2021-12-22 14:48:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:48:18,877 INFO L225 Difference]: With dead ends: 6337 [2021-12-22 14:48:18,877 INFO L226 Difference]: Without dead ends: 4752 [2021-12-22 14:48:18,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-22 14:48:18,882 INFO L933 BasicCegarLoop]: 2762 mSDtfsCounter, 5159 mSDsluCounter, 5285 mSDsCounter, 0 mSdLazyCounter, 4519 mSolverCounterSat, 1811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5530 SdHoareTripleChecker+Valid, 8047 SdHoareTripleChecker+Invalid, 6330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1811 IncrementalHoareTripleChecker+Valid, 4519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:48:18,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5530 Valid, 8047 Invalid, 6330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1811 Valid, 4519 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-12-22 14:48:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2021-12-22 14:48:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 2151. [2021-12-22 14:48:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 1578 states have (on average 1.3846641318124209) internal successors, (2185), 1619 states have internal predecessors, (2185), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-22 14:48:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3080 transitions. [2021-12-22 14:48:19,045 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3080 transitions. Word has length 157 [2021-12-22 14:48:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:48:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 3080 transitions. [2021-12-22 14:48:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 10 states have internal predecessors, (185), 4 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-12-22 14:48:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3080 transitions. [2021-12-22 14:48:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-22 14:48:19,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:48:19,054 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:48:19,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 14:48:19,267 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 [2021-12-22 14:48:19,268 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:48:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:48:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1286483840, now seen corresponding path program 1 times [2021-12-22 14:48:19,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:48:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317528114] [2021-12-22 14:48:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:19,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:48:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:48:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:48:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:48:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:48:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:48:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:48:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:48:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:48:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:48:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:48:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:48:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:48:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 14:48:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 14:48:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 14:48:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 14:48:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-22 14:48:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-22 14:48:19,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:48:19,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317528114] [2021-12-22 14:48:19,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317528114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:48:19,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967363900] [2021-12-22 14:48:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:19,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:48:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:48:19,502 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) [2021-12-22 14:48:19,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:48:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 14:48:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:48:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-22 14:48:20,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:48:20,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967363900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:48:20,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:48:20,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-12-22 14:48:20,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348790766] [2021-12-22 14:48:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:48:20,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:48:20,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:48:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:48:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:48:20,087 INFO L87 Difference]: Start difference. First operand 2151 states and 3080 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-22 14:48:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:48:20,417 INFO L93 Difference]: Finished difference Result 4673 states and 6859 transitions. [2021-12-22 14:48:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:48:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 166 [2021-12-22 14:48:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:48:20,446 INFO L225 Difference]: With dead ends: 4673 [2021-12-22 14:48:20,447 INFO L226 Difference]: Without dead ends: 3081 [2021-12-22 14:48:20,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:48:20,451 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 918 mSDsluCounter, 3634 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 5814 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:48:20,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 5814 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:48:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-12-22 14:48:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2153. [2021-12-22 14:48:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 1580 states have (on average 1.3841772151898735) internal successors, (2187), 1621 states have internal predecessors, (2187), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-22 14:48:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3082 transitions. [2021-12-22 14:48:20,578 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3082 transitions. Word has length 166 [2021-12-22 14:48:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:48:20,578 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3082 transitions. [2021-12-22 14:48:20,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-22 14:48:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3082 transitions. [2021-12-22 14:48:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-22 14:48:20,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:48:20,586 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:48:20,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:48:20,786 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,SelfDestructingSolverStorable10 [2021-12-22 14:48:20,786 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:48:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:48:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash 200803734, now seen corresponding path program 1 times [2021-12-22 14:48:20,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:48:20,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467216524] [2021-12-22 14:48:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:20,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:48:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:48:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:48:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:48:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:48:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:48:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:48:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:48:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:48:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:48:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:48:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:48:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:48:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 14:48:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-22 14:48:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-22 14:48:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 14:48:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-22 14:48:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-22 14:48:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-22 14:48:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-22 14:48:20,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:48:20,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467216524] [2021-12-22 14:48:20,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467216524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:48:20,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:48:20,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:48:20,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646211001] [2021-12-22 14:48:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:48:20,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:48:20,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:48:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:48:20,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:48:20,937 INFO L87 Difference]: Start difference. First operand 2153 states and 3082 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 14:48:23,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:48:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:48:25,530 INFO L93 Difference]: Finished difference Result 4649 states and 6898 transitions. [2021-12-22 14:48:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:48:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 175 [2021-12-22 14:48:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:48:25,541 INFO L225 Difference]: With dead ends: 4649 [2021-12-22 14:48:25,541 INFO L226 Difference]: Without dead ends: 3055 [2021-12-22 14:48:25,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:48:25,546 INFO L933 BasicCegarLoop]: 1981 mSDtfsCounter, 1984 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 4620 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:48:25,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2131 Valid, 4620 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-22 14:48:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-12-22 14:48:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2155. [2021-12-22 14:48:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 1582 states have (on average 1.383691529709229) internal successors, (2189), 1623 states have internal predecessors, (2189), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-22 14:48:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3084 transitions. [2021-12-22 14:48:25,703 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3084 transitions. Word has length 175 [2021-12-22 14:48:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:48:25,703 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 3084 transitions. [2021-12-22 14:48:25,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 14:48:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3084 transitions. [2021-12-22 14:48:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-22 14:48:25,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:48:25,713 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:48:25,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 14:48:25,713 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:48:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:48:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1759072087, now seen corresponding path program 1 times [2021-12-22 14:48:25,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:48:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745491471] [2021-12-22 14:48:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:25,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:48:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:48:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:48:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:48:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:48:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:48:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:48:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:48:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:48:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:48:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:48:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:48:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:48:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 14:48:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 14:48:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 14:48:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-22 14:48:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 14:48:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-22 14:48:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-22 14:48:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 14:48:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-22 14:48:25,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:48:25,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745491471] [2021-12-22 14:48:25,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745491471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:48:25,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38925261] [2021-12-22 14:48:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:48:25,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:48:25,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:48:25,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:48:26,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:48:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:48:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 14:48:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:48:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-22 14:48:26,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:48:26,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38925261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:48:26,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:48:26,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 12 [2021-12-22 14:48:26,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791338861] [2021-12-22 14:48:26,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:48:26,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:48:26,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:48:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:48:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:48:26,697 INFO L87 Difference]: Start difference. First operand 2155 states and 3084 transitions. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20)