/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/Problem19_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:48:03,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:48:03,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:48:04,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:48:04,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:48:04,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:48:04,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:48:04,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:48:04,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:48:04,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:48:04,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:48:04,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:48:04,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:48:04,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:48:04,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:48:04,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:48:04,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:48:04,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:48:04,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:48:04,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:48:04,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:48:04,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:48:04,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:48:04,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:48:04,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:48:04,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:48:04,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:48:04,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:48:04,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:48:04,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:48:04,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:48:04,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:48:04,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:48:04,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:48:04,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:48:04,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:48:04,054 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 [2023-03-30 23:48:04,081 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:48:04,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:48:04,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:48:04,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:48:04,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:48:04,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:48:04,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:48:04,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:48:04,084 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:48:04,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:48:04,085 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:48:04,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:48:04,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:48:04,086 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:48:04,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:48:04,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:48:04,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:48:04,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:48:04,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:04,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:48:04,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:48:04,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:48:04,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:48:04,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:48:04,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:48:04,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:48:04,089 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:48:04,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:48:04,089 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:48:04,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:48:04,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:48:04,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:48:04,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:48:04,349 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:48:04,349 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:48:04,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label11.c [2023-03-30 23:48:05,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:48:06,028 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:48:06,029 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label11.c [2023-03-30 23:48:06,072 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd7c64f2f/841c43e074bc4d74a19b0c79af36b4ea/FLAG6e8dae9c3 [2023-03-30 23:48:06,088 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd7c64f2f/841c43e074bc4d74a19b0c79af36b4ea [2023-03-30 23:48:06,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:48:06,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:48:06,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:06,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:48:06,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:48:06,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:06" (1/1) ... [2023-03-30 23:48:06,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668dff09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:06, skipping insertion in model container [2023-03-30 23:48:06,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:06" (1/1) ... [2023-03-30 23:48:06,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:48:06,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:48:06,463 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/Problem19_label11.c[2490,2503] [2023-03-30 23:48:07,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:07,585 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:48:07,612 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/Problem19_label11.c[2490,2503] [2023-03-30 23:48:08,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:08,301 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:48:08,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08 WrapperNode [2023-03-30 23:48:08,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:08,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:48:08,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:48:08,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:48:08,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,722 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:48:08,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:48:08,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:48:08,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:48:08,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (1/1) ... [2023-03-30 23:48:08,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:08,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:48:08,838 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) [2023-03-30 23:48:08,851 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 [2023-03-30 23:48:08,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:48:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:48:08,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:48:08,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:48:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:48:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:48:08,978 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:48:08,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:48:16,321 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:48:16,345 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:48:16,346 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:48:16,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:16 BoogieIcfgContainer [2023-03-30 23:48:16,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:48:16,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:48:16,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:48:16,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:48:16,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:48:06" (1/3) ... [2023-03-30 23:48:16,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7bf8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:16, skipping insertion in model container [2023-03-30 23:48:16,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:08" (2/3) ... [2023-03-30 23:48:16,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7bf8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:16, skipping insertion in model container [2023-03-30 23:48:16,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:16" (3/3) ... [2023-03-30 23:48:16,357 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label11.c [2023-03-30 23:48:16,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:48:16,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:48:16,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:48:16,469 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;@5aa602e9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:48:16,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:48:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:48:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 23:48:16,492 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:16,492 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] [2023-03-30 23:48:16,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:16,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1484646412, now seen corresponding path program 1 times [2023-03-30 23:48:16,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:16,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494540847] [2023-03-30 23:48:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494540847] [2023-03-30 23:48:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494540847] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:48:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644870481] [2023-03-30 23:48:16,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:16,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:48:16,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:48:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:48:17,009 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-03-30 23:48:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:30,361 INFO L93 Difference]: Finished difference Result 6480 states and 12299 transitions. [2023-03-30 23:48:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:48:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 22 [2023-03-30 23:48:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:30,404 INFO L225 Difference]: With dead ends: 6480 [2023-03-30 23:48:30,405 INFO L226 Difference]: Without dead ends: 4635 [2023-03-30 23:48:30,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:30,424 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 7799 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 9808 mSolverCounterSat, 2328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7799 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 12136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2328 IncrementalHoareTripleChecker+Valid, 9808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:30,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7799 Valid, 493 Invalid, 12136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2328 Valid, 9808 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-03-30 23:48:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2023-03-30 23:48:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4629. [2023-03-30 23:48:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6740319404944213) internal successors, (7652), 4574 states have internal predecessors, (7652), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-03-30 23:48:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7749 transitions. [2023-03-30 23:48:30,651 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7749 transitions. Word has length 22 [2023-03-30 23:48:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:30,653 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7749 transitions. [2023-03-30 23:48:30,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-03-30 23:48:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7749 transitions. [2023-03-30 23:48:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-30 23:48:30,657 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:30,658 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:48:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:48:30,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:30,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash 695607077, now seen corresponding path program 1 times [2023-03-30 23:48:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:30,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709869977] [2023-03-30 23:48:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:30,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:30,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709869977] [2023-03-30 23:48:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709869977] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:31,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:48:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498598454] [2023-03-30 23:48:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:48:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:48:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:48:31,164 INFO L87 Difference]: Start difference. First operand 4629 states and 7749 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 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) [2023-03-30 23:48:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:42,388 INFO L93 Difference]: Finished difference Result 10809 states and 17786 transitions. [2023-03-30 23:48:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:48:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 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 100 [2023-03-30 23:48:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:42,434 INFO L225 Difference]: With dead ends: 10809 [2023-03-30 23:48:42,434 INFO L226 Difference]: Without dead ends: 6186 [2023-03-30 23:48:42,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:48:42,450 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 5313 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 11948 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5313 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 13941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 11948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:42,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5313 Valid, 818 Invalid, 13941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1993 Valid, 11948 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-03-30 23:48:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2023-03-30 23:48:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 6137. [2023-03-30 23:48:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 6029 states have (on average 1.4795156742411677) internal successors, (8920), 6039 states have internal predecessors, (8920), 26 states have call successors, (26), 26 states have call predecessors, (26), 81 states have return successors, (175), 71 states have call predecessors, (175), 25 states have call successors, (175) [2023-03-30 23:48:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9121 transitions. [2023-03-30 23:48:42,648 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9121 transitions. Word has length 100 [2023-03-30 23:48:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:42,649 INFO L495 AbstractCegarLoop]: Abstraction has 6137 states and 9121 transitions. [2023-03-30 23:48:42,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 5 states have internal predecessors, (94), 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) [2023-03-30 23:48:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9121 transitions. [2023-03-30 23:48:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-03-30 23:48:42,656 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:42,656 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:48:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:48:42,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:42,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1071970163, now seen corresponding path program 1 times [2023-03-30 23:48:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:42,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9502328] [2023-03-30 23:48:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:43,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:43,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9502328] [2023-03-30 23:48:43,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9502328] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:43,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:43,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:48:43,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111499346] [2023-03-30 23:48:43,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:43,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:43,079 INFO L87 Difference]: Start difference. First operand 6137 states and 9121 transitions. Second operand has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 4 states have internal predecessors, (97), 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) [2023-03-30 23:48:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:53,524 INFO L93 Difference]: Finished difference Result 18713 states and 28143 transitions. [2023-03-30 23:48:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:48:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 4 states have internal predecessors, (97), 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 103 [2023-03-30 23:48:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:53,571 INFO L225 Difference]: With dead ends: 18713 [2023-03-30 23:48:53,571 INFO L226 Difference]: Without dead ends: 12582 [2023-03-30 23:48:53,585 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 [2023-03-30 23:48:53,586 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14123 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 9844 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14123 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 10673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 9844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:53,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14123 Valid, 783 Invalid, 10673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 9844 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2023-03-30 23:48:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2023-03-30 23:48:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 12184. [2023-03-30 23:48:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12184 states, 11913 states have (on average 1.428859229413246) internal successors, (17022), 11946 states have internal predecessors, (17022), 50 states have call successors, (50), 50 states have call predecessors, (50), 220 states have return successors, (561), 187 states have call predecessors, (561), 49 states have call successors, (561) [2023-03-30 23:48:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12184 states to 12184 states and 17633 transitions. [2023-03-30 23:48:53,866 INFO L78 Accepts]: Start accepts. Automaton has 12184 states and 17633 transitions. Word has length 103 [2023-03-30 23:48:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:53,866 INFO L495 AbstractCegarLoop]: Abstraction has 12184 states and 17633 transitions. [2023-03-30 23:48:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 4 states have internal predecessors, (97), 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) [2023-03-30 23:48:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 12184 states and 17633 transitions. [2023-03-30 23:48:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-03-30 23:48:53,870 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:53,870 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:48:53,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:48:53,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:53,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1877298397, now seen corresponding path program 1 times [2023-03-30 23:48:53,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171439705] [2023-03-30 23:48:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:53,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:54,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:54,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171439705] [2023-03-30 23:48:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171439705] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:54,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:54,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:48:54,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032700061] [2023-03-30 23:48:54,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:54,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:54,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:54,297 INFO L87 Difference]: Start difference. First operand 12184 states and 17633 transitions. Second operand has 7 states, 6 states have (on average 19.5) internal successors, (117), 4 states have internal predecessors, (117), 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)