/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:39:38,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:39:38,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:39:38,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 22:39:38,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 22:39:38,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 22:39:38,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 22:39:38,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 22:39:38,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 22:39:38,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 22:39:38,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 22:39:38,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 22:39:38,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:39:38,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:39:38,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:39:38,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:39:38,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:39:38,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:39:38,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:39:38,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:39:38,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:39:38,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:39:38,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:39:38,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:39:38,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 22:39:38,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 22:39:38,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 22:39:38,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 22:39:38,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 22:39:38,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 22:39:38,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 22:39:38,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 22:39:38,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 22:39:38,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 22:39:38,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 22:39:38,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 22:39:38,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 22:39:38,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 22:39:38,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:39:38,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:39:38,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:39:38,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:39:38,728 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:39:38,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:39:38,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:39:38,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:39:38,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:39:38,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:39:38,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:39:38,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:39:38,731 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:39:38,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:39:38,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:39:38,733 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:39:38,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:39:38,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:39:38,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:39:38,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:39:38,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:39:38,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:39:38,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:39:38,734 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:39:38,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:39:38,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:39:38,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:39:38,935 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:39:38,935 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:39:38,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-04-01 22:39:39,948 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:39:40,301 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:39:40,302 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-04-01 22:39:40,330 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c4b5d04c/8bf4513a61b0406ab637c8efd9751595/FLAG24ae57635 [2023-04-01 22:39:40,346 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c4b5d04c/8bf4513a61b0406ab637c8efd9751595 [2023-04-01 22:39:40,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:39:40,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:39:40,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:39:40,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:39:40,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:39:40,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:39:40" (1/1) ... [2023-04-01 22:39:40,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19490866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:40, skipping insertion in model container [2023-04-01 22:39:40,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:39:40" (1/1) ... [2023-04-01 22:39:40,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:39:40,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:39:40,680 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2023-04-01 22:39:41,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:39:41,224 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:39:41,242 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2023-04-01 22:39:41,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:39:41,657 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:39:41,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41 WrapperNode [2023-04-01 22:39:41,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:39:41,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:39:41,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:39:41,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:39:41,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:39:41,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:39:41,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:39:41,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:39:41,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (1/1) ... [2023-04-01 22:39:41,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:39:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:39:41,904 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) [2023-04-01 22:39:41,933 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 [2023-04-01 22:39:41,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:39:41,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:39:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:39:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:39:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:39:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:39:42,046 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:39:42,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:39:45,692 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:39:45,708 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:39:45,708 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:39:45,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:39:45 BoogieIcfgContainer [2023-04-01 22:39:45,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:39:45,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:39:45,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:39:45,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:39:45,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:39:40" (1/3) ... [2023-04-01 22:39:45,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e460eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:39:45, skipping insertion in model container [2023-04-01 22:39:45,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:39:41" (2/3) ... [2023-04-01 22:39:45,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e460eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:39:45, skipping insertion in model container [2023-04-01 22:39:45,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:39:45" (3/3) ... [2023-04-01 22:39:45,716 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2023-04-01 22:39:45,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:39:45,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:39:45,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:39:45,777 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a3fb7f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:39:45,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:39:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:39:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 22:39:45,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:39:45,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:39:45,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:39:45,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:39:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1373212649, now seen corresponding path program 1 times [2023-04-01 22:39:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:39:45,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596321999] [2023-04-01 22:39:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:39:45,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:39:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:39:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:39:46,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:39:46,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596321999] [2023-04-01 22:39:46,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596321999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:39:46,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:39:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:39:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289914486] [2023-04-01 22:39:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:39:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:39:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:39:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:39:46,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:39:46,218 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:39:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:39:51,259 INFO L93 Difference]: Finished difference Result 3165 states and 5795 transitions. [2023-04-01 22:39:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:39:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 22:39:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:39:51,286 INFO L225 Difference]: With dead ends: 3165 [2023-04-01 22:39:51,286 INFO L226 Difference]: Without dead ends: 1961 [2023-04-01 22:39:51,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:39:51,298 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 2920 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4376 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 4376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:39:51,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2920 Valid, 292 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 4376 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-01 22:39:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-04-01 22:39:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1943. [2023-04-01 22:39:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1918 states have (on average 1.7278415015641293) internal successors, (3314), 1920 states have internal predecessors, (3314), 10 states have call successors, (10), 10 states have call predecessors, (10), 14 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2023-04-01 22:39:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3346 transitions. [2023-04-01 22:39:51,403 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3346 transitions. Word has length 28 [2023-04-01 22:39:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:39:51,404 INFO L495 AbstractCegarLoop]: Abstraction has 1943 states and 3346 transitions. [2023-04-01 22:39:51,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:39:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3346 transitions. [2023-04-01 22:39:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 22:39:51,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:39:51,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:39:51,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:39:51,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:39:51,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:39:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 727692745, now seen corresponding path program 1 times [2023-04-01 22:39:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:39:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183493903] [2023-04-01 22:39:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:39:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:39:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:39:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:51,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:39:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:39:51,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:39:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183493903] [2023-04-01 22:39:51,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183493903] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:39:51,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:39:51,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:39:51,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697490415] [2023-04-01 22:39:51,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:39:51,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:39:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:39:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:39:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:39:51,727 INFO L87 Difference]: Start difference. First operand 1943 states and 3346 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:39:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:39:58,766 INFO L93 Difference]: Finished difference Result 6452 states and 11418 transitions. [2023-04-01 22:39:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:39:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 97 [2023-04-01 22:39:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:39:58,804 INFO L225 Difference]: With dead ends: 6452 [2023-04-01 22:39:58,805 INFO L226 Difference]: Without dead ends: 4515 [2023-04-01 22:39:58,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:39:58,819 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6901 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 6734 mSolverCounterSat, 2197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6901 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 8931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2197 IncrementalHoareTripleChecker+Valid, 6734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:39:58,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6901 Valid, 596 Invalid, 8931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2197 Valid, 6734 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 22:39:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2023-04-01 22:39:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4476. [2023-04-01 22:39:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4388 states have (on average 1.5009115770282588) internal successors, (6586), 4401 states have internal predecessors, (6586), 22 states have call successors, (22), 22 states have call predecessors, (22), 65 states have return successors, (161), 52 states have call predecessors, (161), 21 states have call successors, (161) [2023-04-01 22:39:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6769 transitions. [2023-04-01 22:39:58,915 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6769 transitions. Word has length 97 [2023-04-01 22:39:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:39:58,916 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 6769 transitions. [2023-04-01 22:39:58,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:39:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6769 transitions. [2023-04-01 22:39:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 22:39:58,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:39:58,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:39:58,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:39:58,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:39:58,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:39:58,919 INFO L85 PathProgramCache]: Analyzing trace with hash -784530459, now seen corresponding path program 1 times [2023-04-01 22:39:58,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:39:58,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020344867] [2023-04-01 22:39:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:39:58,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:39:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:59,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:39:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:59,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:39:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:39:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:39:59,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:39:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020344867] [2023-04-01 22:39:59,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020344867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:39:59,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:39:59,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:39:59,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997453953] [2023-04-01 22:39:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:39:59,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:39:59,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:39:59,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:39:59,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:39:59,249 INFO L87 Difference]: Start difference. First operand 4476 states and 6769 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:40:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:04,845 INFO L93 Difference]: Finished difference Result 13390 states and 20653 transitions. [2023-04-01 22:40:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:40:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2023-04-01 22:40:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:04,871 INFO L225 Difference]: With dead ends: 13390 [2023-04-01 22:40:04,871 INFO L226 Difference]: Without dead ends: 8920 [2023-04-01 22:40:04,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:40:04,879 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5086 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 6567 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5086 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 7541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 6567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:04,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5086 Valid, 814 Invalid, 7541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 6567 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 22:40:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8920 states. [2023-04-01 22:40:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8920 to 8799. [2023-04-01 22:40:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8567 states have (on average 1.345862028714836) internal successors, (11530), 8609 states have internal predecessors, (11530), 42 states have call successors, (42), 42 states have call predecessors, (42), 189 states have return successors, (627), 147 states have call predecessors, (627), 41 states have call successors, (627) [2023-04-01 22:40:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 12199 transitions. [2023-04-01 22:40:05,039 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 12199 transitions. Word has length 99 [2023-04-01 22:40:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:05,041 INFO L495 AbstractCegarLoop]: Abstraction has 8799 states and 12199 transitions. [2023-04-01 22:40:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:40:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 12199 transitions. [2023-04-01 22:40:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 22:40:05,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:05,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:40:05,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:40:05,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:05,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1940384877, now seen corresponding path program 1 times [2023-04-01 22:40:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:05,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131570179] [2023-04-01 22:40:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:05,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:05,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:40:05,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:05,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131570179] [2023-04-01 22:40:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131570179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:05,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418592806] [2023-04-01 22:40:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:05,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:05,259 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) [2023-04-01 22:40:05,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:40:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:05,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:05,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:40:05,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:40:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418592806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:40:05,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:40:05,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:40:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163361078] [2023-04-01 22:40:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:40:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:40:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:40:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:40:05,441 INFO L87 Difference]: Start difference. First operand 8799 states and 12199 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:40:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:08,474 INFO L93 Difference]: Finished difference Result 25892 states and 37035 transitions. [2023-04-01 22:40:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:40:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 143 [2023-04-01 22:40:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:08,531 INFO L225 Difference]: With dead ends: 25892 [2023-04-01 22:40:08,531 INFO L226 Difference]: Without dead ends: 17099 [2023-04-01 22:40:08,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:40:08,546 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 866 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:08,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1150 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 22:40:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17099 states. [2023-04-01 22:40:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17099 to 17071. [2023-04-01 22:40:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 16671 states have (on average 1.2196029032451563) internal successors, (20332), 16742 states have internal predecessors, (20332), 82 states have call successors, (82), 82 states have call predecessors, (82), 317 states have return successors, (1633), 246 states have call predecessors, (1633), 81 states have call successors, (1633) [2023-04-01 22:40:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 22047 transitions. [2023-04-01 22:40:08,843 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 22047 transitions. Word has length 143 [2023-04-01 22:40:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:08,844 INFO L495 AbstractCegarLoop]: Abstraction has 17071 states and 22047 transitions. [2023-04-01 22:40:08,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:40:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 22047 transitions. [2023-04-01 22:40:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 22:40:08,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:08,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:40:08,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:40:09,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:09,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:09,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash -518539151, now seen corresponding path program 1 times [2023-04-01 22:40:09,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:09,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37050387] [2023-04-01 22:40:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:09,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:40:09,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37050387] [2023-04-01 22:40:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37050387] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239871381] [2023-04-01 22:40:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:09,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:09,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:09,265 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) [2023-04-01 22:40:09,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:40:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:09,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:09,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:40:09,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:40:09,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239871381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:40:09,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:40:09,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:40:09,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303986014] [2023-04-01 22:40:09,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:40:09,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:40:09,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:40:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:40:09,478 INFO L87 Difference]: Start difference. First operand 17071 states and 22047 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:40:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:12,274 INFO L93 Difference]: Finished difference Result 33334 states and 43327 transitions. [2023-04-01 22:40:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:40:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 148 [2023-04-01 22:40:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:12,310 INFO L225 Difference]: With dead ends: 33334 [2023-04-01 22:40:12,311 INFO L226 Difference]: Without dead ends: 17072 [2023-04-01 22:40:12,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:40:12,336 INFO L413 NwaCegarLoop]: 1412 mSDtfsCounter, 1205 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:12,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 1518 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 22:40:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2023-04-01 22:40:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 15465. [2023-04-01 22:40:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15465 states, 15081 states have (on average 1.161925601750547) internal successors, (17523), 15152 states have internal predecessors, (17523), 74 states have call successors, (74), 74 states have call predecessors, (74), 309 states have return successors, (1141), 238 states have call predecessors, (1141), 73 states have call successors, (1141) [2023-04-01 22:40:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15465 states to 15465 states and 18738 transitions. [2023-04-01 22:40:12,594 INFO L78 Accepts]: Start accepts. Automaton has 15465 states and 18738 transitions. Word has length 148 [2023-04-01 22:40:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:12,594 INFO L495 AbstractCegarLoop]: Abstraction has 15465 states and 18738 transitions. [2023-04-01 22:40:12,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:40:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15465 states and 18738 transitions. [2023-04-01 22:40:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 22:40:12,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:12,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:40:12,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:40:12,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:12,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:12,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1456610751, now seen corresponding path program 1 times [2023-04-01 22:40:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:12,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894144657] [2023-04-01 22:40:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:12,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:12,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:40:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:40:13,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894144657] [2023-04-01 22:40:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894144657] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206812572] [2023-04-01 22:40:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:13,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:13,104 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) [2023-04-01 22:40:13,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:40:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:13,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:13,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:40:13,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:40:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:40:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206812572] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:40:13,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:40:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:40:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863399610] [2023-04-01 22:40:13,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:40:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:40:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:40:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:40:13,513 INFO L87 Difference]: Start difference. First operand 15465 states and 18738 transitions. Second operand has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 9 states have internal predecessors, (344), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 22:40:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:19,688 INFO L93 Difference]: Finished difference Result 44657 states and 56720 transitions. [2023-04-01 22:40:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:40:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 9 states have internal predecessors, (344), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 217 [2023-04-01 22:40:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:19,756 INFO L225 Difference]: With dead ends: 44657 [2023-04-01 22:40:19,756 INFO L226 Difference]: Without dead ends: 30001 [2023-04-01 22:40:19,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:40:19,781 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9898 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 7214 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9898 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 8748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 7214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:19,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9898 Valid, 836 Invalid, 8748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 7214 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 22:40:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30001 states. [2023-04-01 22:40:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30001 to 29748. [2023-04-01 22:40:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29748 states, 28733 states have (on average 1.1312080186545088) internal successors, (32503), 28992 states have internal predecessors, (32503), 138 states have call successors, (138), 138 states have call predecessors, (138), 876 states have return successors, (3375), 617 states have call predecessors, (3375), 137 states have call successors, (3375) [2023-04-01 22:40:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29748 states to 29748 states and 36016 transitions. [2023-04-01 22:40:20,441 INFO L78 Accepts]: Start accepts. Automaton has 29748 states and 36016 transitions. Word has length 217 [2023-04-01 22:40:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:20,441 INFO L495 AbstractCegarLoop]: Abstraction has 29748 states and 36016 transitions. [2023-04-01 22:40:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 9 states have internal predecessors, (344), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 22:40:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 29748 states and 36016 transitions. [2023-04-01 22:40:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 22:40:20,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:20,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:40:20,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:40:20,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:20,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:20,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1506690744, now seen corresponding path program 1 times [2023-04-01 22:40:20,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:20,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062817016] [2023-04-01 22:40:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:20,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:20,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:20,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:20,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:40:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:40:20,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062817016] [2023-04-01 22:40:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062817016] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324717245] [2023-04-01 22:40:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:20,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:20,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:40:20,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:40:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:21,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:21,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:40:21,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:40:21,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324717245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:40:21,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:40:21,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 22:40:21,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962363327] [2023-04-01 22:40:21,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:40:21,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:40:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:40:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:40:21,090 INFO L87 Difference]: Start difference. First operand 29748 states and 36016 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:40:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:24,217 INFO L93 Difference]: Finished difference Result 66958 states and 83253 transitions. [2023-04-01 22:40:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:40:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 250 [2023-04-01 22:40:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:24,327 INFO L225 Difference]: With dead ends: 66958 [2023-04-01 22:40:24,327 INFO L226 Difference]: Without dead ends: 42122 [2023-04-01 22:40:24,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:40:24,363 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 1013 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2632 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 2632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:24,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 600 Invalid, 3444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 2632 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 22:40:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2023-04-01 22:40:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 37192. [2023-04-01 22:40:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37192 states, 36018 states have (on average 1.1339052695874285) internal successors, (40841), 36318 states have internal predecessors, (40841), 174 states have call successors, (174), 174 states have call predecessors, (174), 999 states have return successors, (4614), 699 states have call predecessors, (4614), 173 states have call successors, (4614) [2023-04-01 22:40:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37192 states to 37192 states and 45629 transitions. [2023-04-01 22:40:24,998 INFO L78 Accepts]: Start accepts. Automaton has 37192 states and 45629 transitions. Word has length 250 [2023-04-01 22:40:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:24,999 INFO L495 AbstractCegarLoop]: Abstraction has 37192 states and 45629 transitions. [2023-04-01 22:40:24,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:40:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 37192 states and 45629 transitions. [2023-04-01 22:40:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-04-01 22:40:25,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:25,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:40:25,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 22:40:25,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:25,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:25,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1267842561, now seen corresponding path program 1 times [2023-04-01 22:40:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:25,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197437443] [2023-04-01 22:40:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:25,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:25,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:40:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:25,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:40:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 227 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 22:40:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:25,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197437443] [2023-04-01 22:40:25,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197437443] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:25,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062881649] [2023-04-01 22:40:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:25,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:40:25,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:40:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:25,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:25,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 234 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 22:40:26,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:40:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 234 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 22:40:26,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062881649] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:40:26,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:40:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:40:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875727730] [2023-04-01 22:40:26,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:40:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:40:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:40:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:40:26,383 INFO L87 Difference]: Start difference. First operand 37192 states and 45629 transitions. Second operand has 12 states, 12 states have (on average 35.333333333333336) internal successors, (424), 10 states have internal predecessors, (424), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:40:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:38,299 INFO L93 Difference]: Finished difference Result 129996 states and 176936 transitions. [2023-04-01 22:40:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 22:40:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 35.333333333333336) internal successors, (424), 10 states have internal predecessors, (424), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 300 [2023-04-01 22:40:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:38,511 INFO L225 Difference]: With dead ends: 129996 [2023-04-01 22:40:38,511 INFO L226 Difference]: Without dead ends: 93613 [2023-04-01 22:40:38,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 617 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:40:38,548 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 6007 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 13299 mSolverCounterSat, 3369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6007 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 16668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3369 IncrementalHoareTripleChecker+Valid, 13299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:38,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6007 Valid, 1090 Invalid, 16668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3369 Valid, 13299 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-04-01 22:40:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93613 states. [2023-04-01 22:40:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93613 to 88587. [2023-04-01 22:40:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88587 states, 85981 states have (on average 1.1255393633477164) internal successors, (96775), 86726 states have internal predecessors, (96775), 418 states have call successors, (418), 418 states have call predecessors, (418), 2187 states have return successors, (17619), 1442 states have call predecessors, (17619), 417 states have call successors, (17619) [2023-04-01 22:40:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88587 states to 88587 states and 114812 transitions. [2023-04-01 22:40:40,078 INFO L78 Accepts]: Start accepts. Automaton has 88587 states and 114812 transitions. Word has length 300 [2023-04-01 22:40:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:40,079 INFO L495 AbstractCegarLoop]: Abstraction has 88587 states and 114812 transitions. [2023-04-01 22:40:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 35.333333333333336) internal successors, (424), 10 states have internal predecessors, (424), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:40:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 88587 states and 114812 transitions. [2023-04-01 22:40:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-04-01 22:40:40,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:40,106 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:40:40,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:40:40,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:40,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:40,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash -13075489, now seen corresponding path program 1 times [2023-04-01 22:40:40,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:40,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460549986] [2023-04-01 22:40:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:40:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-04-01 22:40:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2023-04-01 22:40:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 93 proven. 426 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-01 22:40:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460549986] [2023-04-01 22:40:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460549986] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908207862] [2023-04-01 22:40:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:41,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:40:41,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:40:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:41,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:41,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 498 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:40:41,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:40:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 245 proven. 76 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-04-01 22:40:42,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908207862] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:40:42,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:40:42,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-04-01 22:40:42,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641243271] [2023-04-01 22:40:42,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:40:42,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 22:40:42,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 22:40:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:40:42,155 INFO L87 Difference]: Start difference. First operand 88587 states and 114812 transitions. Second operand has 16 states, 16 states have (on average 41.625) internal successors, (666), 14 states have internal predecessors, (666), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 22:41:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:41:07,419 INFO L93 Difference]: Finished difference Result 220534 states and 303404 transitions. [2023-04-01 22:41:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-04-01 22:41:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 41.625) internal successors, (666), 14 states have internal predecessors, (666), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 464 [2023-04-01 22:41:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:41:07,906 INFO L225 Difference]: With dead ends: 220534 [2023-04-01 22:41:07,907 INFO L226 Difference]: Without dead ends: 128574 [2023-04-01 22:41:08,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1199 GetRequests, 1045 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9465 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2450, Invalid=21420, Unknown=0, NotChecked=0, Total=23870 [2023-04-01 22:41:08,009 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 18111 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 40456 mSolverCounterSat, 5725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18129 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 46181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5725 IncrementalHoareTripleChecker+Valid, 40456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:41:08,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18129 Valid, 2996 Invalid, 46181 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5725 Valid, 40456 Invalid, 0 Unknown, 0 Unchecked, 20.6s Time] [2023-04-01 22:41:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128574 states. [2023-04-01 22:41:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128574 to 124296. [2023-04-01 22:41:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124296 states, 121448 states have (on average 1.0504742770568474) internal successors, (127578), 122163 states have internal predecessors, (127578), 611 states have call successors, (611), 598 states have call predecessors, (611), 2236 states have return successors, (11773), 1534 states have call predecessors, (11773), 610 states have call successors, (11773) [2023-04-01 22:41:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124296 states to 124296 states and 139962 transitions. [2023-04-01 22:41:10,378 INFO L78 Accepts]: Start accepts. Automaton has 124296 states and 139962 transitions. Word has length 464 [2023-04-01 22:41:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:41:10,378 INFO L495 AbstractCegarLoop]: Abstraction has 124296 states and 139962 transitions. [2023-04-01 22:41:10,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 41.625) internal successors, (666), 14 states have internal predecessors, (666), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 22:41:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 124296 states and 139962 transitions. [2023-04-01 22:41:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-04-01 22:41:10,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:41:10,540 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2023-04-01 22:41:10,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:41:10,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:41:10,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:41:10,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:41:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash -242596807, now seen corresponding path program 1 times [2023-04-01 22:41:10,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:41:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634639708] [2023-04-01 22:41:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:41:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:41:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:41:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:41:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:41:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2023-04-01 22:41:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2023-04-01 22:41:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-04-01 22:41:11,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:41:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634639708] [2023-04-01 22:41:11,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634639708] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:41:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796211528] [2023-04-01 22:41:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:41:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:41:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:41:11,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:41:11,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:41:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:11,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:41:11,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:41:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 439 proven. 2 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2023-04-01 22:41:12,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:41:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 96 proven. 475 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-04-01 22:41:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796211528] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:41:13,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:41:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:41:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365825092] [2023-04-01 22:41:13,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:41:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:41:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:41:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:41:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:41:13,034 INFO L87 Difference]: Start difference. First operand 124296 states and 139962 transitions. Second operand has 17 states, 17 states have (on average 45.35294117647059) internal successors, (771), 15 states have internal predecessors, (771), 7 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:41:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:41:41,038 INFO L93 Difference]: Finished difference Result 498309 states and 602364 transitions. [2023-04-01 22:41:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-04-01 22:41:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 45.35294117647059) internal successors, (771), 15 states have internal predecessors, (771), 7 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 479 [2023-04-01 22:41:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:41:42,679 INFO L225 Difference]: With dead ends: 498309 [2023-04-01 22:41:42,680 INFO L226 Difference]: Without dead ends: 376444 [2023-04-01 22:41:42,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1063 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7239 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2579, Invalid=16327, Unknown=0, NotChecked=0, Total=18906 [2023-04-01 22:41:42,878 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 18678 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 37880 mSolverCounterSat, 5862 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18697 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 43742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5862 IncrementalHoareTripleChecker+Valid, 37880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:41:42,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18697 Valid, 2316 Invalid, 43742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5862 Valid, 37880 Invalid, 0 Unknown, 0 Unchecked, 21.6s Time] [2023-04-01 22:41:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376444 states. [2023-04-01 22:41:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376444 to 360575. [2023-04-01 22:41:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360575 states, 354688 states have (on average 1.0440048718874053) internal successors, (370296), 355757 states have internal predecessors, (370296), 1793 states have call successors, (1793), 1766 states have call predecessors, (1793), 4093 states have return successors, (33953), 3051 states have call predecessors, (33953), 1792 states have call successors, (33953) [2023-04-01 22:41:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360575 states to 360575 states and 406042 transitions. [2023-04-01 22:41:51,355 INFO L78 Accepts]: Start accepts. Automaton has 360575 states and 406042 transitions. Word has length 479 [2023-04-01 22:41:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:41:51,356 INFO L495 AbstractCegarLoop]: Abstraction has 360575 states and 406042 transitions. [2023-04-01 22:41:51,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 45.35294117647059) internal successors, (771), 15 states have internal predecessors, (771), 7 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:41:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 360575 states and 406042 transitions. [2023-04-01 22:41:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-04-01 22:41:51,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:41:51,496 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:41:51,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:41:51,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:41:51,702 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:41:51,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:41:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -264610621, now seen corresponding path program 1 times [2023-04-01 22:41:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:41:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787105122] [2023-04-01 22:41:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:41:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:41:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:41:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:52,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:41:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:41:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:52,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-04-01 22:41:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:52,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:41:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:53,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 22:41:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 157 proven. 132 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 22:41:53,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:41:53,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787105122] [2023-04-01 22:41:53,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787105122] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:41:53,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949705577] [2023-04-01 22:41:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:41:53,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:41:53,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:41:53,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:41:53,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:41:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:53,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:41:53,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:41:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-01 22:41:53,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:41:53,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949705577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:41:53,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:41:53,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 22:41:53,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172309102] [2023-04-01 22:41:53,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:41:53,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:41:53,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:41:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:41:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:41:53,665 INFO L87 Difference]: Start difference. First operand 360575 states and 406042 transitions. Second operand has 5 states, 5 states have (on average 129.2) internal successors, (646), 4 states have internal predecessors, (646), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 22:42:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:00,776 INFO L93 Difference]: Finished difference Result 715648 states and 806900 transitions. [2023-04-01 22:42:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:42:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 129.2) internal successors, (646), 4 states have internal predecessors, (646), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 810 [2023-04-01 22:42:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:02,189 INFO L225 Difference]: With dead ends: 715648 [2023-04-01 22:42:02,189 INFO L226 Difference]: Without dead ends: 360746 [2023-04-01 22:42:02,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:42:02,414 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 2434 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 5243 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 5243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:02,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2434 Valid, 559 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 5243 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 22:42:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360746 states. [2023-04-01 22:42:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360746 to 360629. [2023-04-01 22:42:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360629 states, 354717 states have (on average 1.0439815402137478) internal successors, (370318), 355803 states have internal predecessors, (370318), 1793 states have call successors, (1793), 1766 states have call predecessors, (1793), 4118 states have return successors, (34350), 3059 states have call predecessors, (34350), 1792 states have call successors, (34350) [2023-04-01 22:42:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360629 states to 360629 states and 406461 transitions. [2023-04-01 22:42:08,462 INFO L78 Accepts]: Start accepts. Automaton has 360629 states and 406461 transitions. Word has length 810 [2023-04-01 22:42:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:08,462 INFO L495 AbstractCegarLoop]: Abstraction has 360629 states and 406461 transitions. [2023-04-01 22:42:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.2) internal successors, (646), 4 states have internal predecessors, (646), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 22:42:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 360629 states and 406461 transitions. [2023-04-01 22:42:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2023-04-01 22:42:08,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:08,593 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:42:08,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:42:08,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 22:42:08,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:08,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1285483921, now seen corresponding path program 1 times [2023-04-01 22:42:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:08,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481217085] [2023-04-01 22:42:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:08,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:42:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2023-04-01 22:42:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:42:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 22:42:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 164 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 22:42:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481217085] [2023-04-01 22:42:09,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481217085] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132965510] [2023-04-01 22:42:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:09,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:09,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:42:09,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:42:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:10,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:42:10,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 22:42:10,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:42:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 165 proven. 146 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-04-01 22:42:10,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132965510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:42:10,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:42:10,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:42:10,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034712886] [2023-04-01 22:42:10,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:42:10,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:42:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:42:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:42:10,815 INFO L87 Difference]: Start difference. First operand 360629 states and 406461 transitions. Second operand has 11 states, 11 states have (on average 153.8181818181818) internal successors, (1692), 9 states have internal predecessors, (1692), 4 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 22:42:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:20,063 INFO L93 Difference]: Finished difference Result 709448 states and 800542 transitions. [2023-04-01 22:42:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 22:42:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 153.8181818181818) internal successors, (1692), 9 states have internal predecessors, (1692), 4 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 906 [2023-04-01 22:42:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:21,102 INFO L225 Difference]: With dead ends: 709448 [2023-04-01 22:42:21,102 INFO L226 Difference]: Without dead ends: 359338 [2023-04-01 22:42:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1858 GetRequests, 1832 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:42:21,468 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 4139 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 9075 mSolverCounterSat, 1750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4139 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 10825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1750 IncrementalHoareTripleChecker+Valid, 9075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4139 Valid, 764 Invalid, 10825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1750 Valid, 9075 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 22:42:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359338 states. [2023-04-01 22:42:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359338 to 348019. [2023-04-01 22:42:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348019 states, 342146 states have (on average 1.03827605758945) internal successors, (355242), 343276 states have internal predecessors, (355242), 1729 states have call successors, (1729), 1702 states have call predecessors, (1729), 4143 states have return successors, (29002), 3040 states have call predecessors, (29002), 1728 states have call successors, (29002) [2023-04-01 22:42:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348019 states to 348019 states and 385973 transitions. [2023-04-01 22:42:27,776 INFO L78 Accepts]: Start accepts. Automaton has 348019 states and 385973 transitions. Word has length 906 [2023-04-01 22:42:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:27,776 INFO L495 AbstractCegarLoop]: Abstraction has 348019 states and 385973 transitions. [2023-04-01 22:42:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 153.8181818181818) internal successors, (1692), 9 states have internal predecessors, (1692), 4 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 22:42:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 348019 states and 385973 transitions. [2023-04-01 22:42:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2023-04-01 22:42:27,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:27,883 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:42:27,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 22:42:28,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:28,090 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:28,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1237320705, now seen corresponding path program 1 times [2023-04-01 22:42:28,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:28,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761420144] [2023-04-01 22:42:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:28,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:42:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2023-04-01 22:42:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2023-04-01 22:42:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:42:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 22:42:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 284 proven. 132 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-04-01 22:42:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761420144] [2023-04-01 22:42:29,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761420144] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085264555] [2023-04-01 22:42:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:29,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:29,557 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:42:29,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 22:42:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:29,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:42:29,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-01 22:42:30,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:42:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 93 proven. 462 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-01 22:42:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085264555] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:42:31,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:42:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-04-01 22:42:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688484765] [2023-04-01 22:42:31,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:42:31,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 22:42:31,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 22:42:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-04-01 22:42:31,503 INFO L87 Difference]: Start difference. First operand 348019 states and 385973 transitions. Second operand has 19 states, 19 states have (on average 85.63157894736842) internal successors, (1627), 17 states have internal predecessors, (1627), 7 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-01 22:43:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:43:07,276 INFO L93 Difference]: Finished difference Result 963854 states and 1076219 transitions. [2023-04-01 22:43:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-04-01 22:43:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 85.63157894736842) internal successors, (1627), 17 states have internal predecessors, (1627), 7 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 910 [2023-04-01 22:43:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:43:10,045 INFO L225 Difference]: With dead ends: 963854 [2023-04-01 22:43:10,046 INFO L226 Difference]: Without dead ends: 619070 [2023-04-01 22:43:10,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2153 GetRequests, 1975 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13316 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4020, Invalid=27842, Unknown=0, NotChecked=0, Total=31862 [2023-04-01 22:43:10,508 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 35669 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 42854 mSolverCounterSat, 11079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35677 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 53933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11079 IncrementalHoareTripleChecker+Valid, 42854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:43:10,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35677 Valid, 2910 Invalid, 53933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11079 Valid, 42854 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2023-04-01 22:43:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619070 states. [2023-04-01 22:43:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619070 to 567893. [2023-04-01 22:43:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567893 states, 558159 states have (on average 1.0339849397752254) internal successors, (577128), 560104 states have internal predecessors, (577128), 2804 states have call successors, (2804), 2774 states have call predecessors, (2804), 6929 states have return successors, (43081), 5014 states have call predecessors, (43081), 2803 states have call successors, (43081) [2023-04-01 22:43:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567893 states to 567893 states and 623013 transitions. [2023-04-01 22:43:21,473 INFO L78 Accepts]: Start accepts. Automaton has 567893 states and 623013 transitions. Word has length 910 [2023-04-01 22:43:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:43:21,474 INFO L495 AbstractCegarLoop]: Abstraction has 567893 states and 623013 transitions. [2023-04-01 22:43:21,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.63157894736842) internal successors, (1627), 17 states have internal predecessors, (1627), 7 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-01 22:43:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 567893 states and 623013 transitions. [2023-04-01 22:43:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2023-04-01 22:43:21,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:43:21,595 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:43:21,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 22:43:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 22:43:21,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:43:21,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:43:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 767016731, now seen corresponding path program 1 times [2023-04-01 22:43:21,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:43:21,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51626120] [2023-04-01 22:43:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:21,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:43:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:23,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:43:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:43:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:43:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 22:43:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2023-04-01 22:43:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:23,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:43:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:24,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 22:43:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 98 proven. 363 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-04-01 22:43:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:43:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51626120] [2023-04-01 22:43:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51626120] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:43:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847621620] [2023-04-01 22:43:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:24,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:24,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:43:24,030 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:43:24,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 22:43:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:24,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 1356 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 22:43:24,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:43:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-04-01 22:43:24,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:43:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847621620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:43:24,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:43:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2023-04-01 22:43:24,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685723512] [2023-04-01 22:43:24,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:43:24,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:43:24,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:43:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:43:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:43:24,389 INFO L87 Difference]: Start difference. First operand 567893 states and 623013 transitions. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 22:43:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:43:32,350 INFO L93 Difference]: Finished difference Result 1133144 states and 1244358 transitions. [2023-04-01 22:43:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:43:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 970 [2023-04-01 22:43:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:43:34,739 INFO L225 Difference]: With dead ends: 1133144 [2023-04-01 22:43:34,739 INFO L226 Difference]: Without dead ends: 552042