/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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:48:54,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:48:54,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:48:55,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:48:55,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:48:55,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:48:55,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:48:55,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:48:55,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:48:55,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:48:55,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:48:55,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:48:55,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:48:55,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:48:55,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:48:55,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:48:55,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:48:55,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:48:55,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:48:55,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:48:55,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:48:55,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:48:55,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:48:55,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:48:55,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:48:55,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:48:55,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:48:55,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:48:55,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:48:55,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:48:55,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:48:55,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:48:55,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:48:55,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:48:55,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:48:55,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:48:55,042 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 23:48:55,060 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:48:55,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:48:55,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:48:55,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:48:55,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:48:55,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:48:55,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:48:55,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:48:55,062 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:48:55,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:48:55,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:48:55,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:48:55,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:48:55,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:48:55,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:48:55,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:48:55,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:48:55,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:48:55,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:48:55,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:48:55,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:48:55,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:48:55,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:48:55,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:48:55,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:55,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:48:55,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:48:55,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:48:55,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:48:55,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:48:55,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:48:55,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:48:55,066 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:48:55,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:48:55,067 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:48:55,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:48:55,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:48:55,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:48:55,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:48:55,294 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:48:55,295 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:48:55,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label23.c [2023-03-30 23:48:56,482 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:48:57,040 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:48:57,041 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label23.c [2023-03-30 23:48:57,083 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799cb3ded/bf42e9b2dc714a8e86309398b1aad5c5/FLAG8709ef3a0 [2023-03-30 23:48:57,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799cb3ded/bf42e9b2dc714a8e86309398b1aad5c5 [2023-03-30 23:48:57,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:48:57,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:48:57,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:57,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:48:57,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:48:57,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:57" (1/1) ... [2023-03-30 23:48:57,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a536d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:57, skipping insertion in model container [2023-03-30 23:48:57,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:57" (1/1) ... [2023-03-30 23:48:57,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:48:57,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:48:57,603 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_label23.c[6859,6872] [2023-03-30 23:48:58,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:58,668 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:48:58,700 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_label23.c[6859,6872] [2023-03-30 23:48:59,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:59,423 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:48:59,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59 WrapperNode [2023-03-30 23:48:59,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:59,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:48:59,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:48:59,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:48:59,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:48:59,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:48:59,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:48:59,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:48:59,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (1/1) ... [2023-03-30 23:48:59,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:48:59,958 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 23:48:59,965 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 23:48:59,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:48:59,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:48:59,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:48:59,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:48:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:48:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:48:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:48:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:48:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:48:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:48:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:48:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:49:00,069 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:49:00,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:49:07,389 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:49:07,407 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:49:07,407 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:49:07,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:49:07 BoogieIcfgContainer [2023-03-30 23:49:07,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:49:07,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:49:07,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:49:07,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:49:07,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:48:57" (1/3) ... [2023-03-30 23:49:07,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162a661a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:49:07, skipping insertion in model container [2023-03-30 23:49:07,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:59" (2/3) ... [2023-03-30 23:49:07,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162a661a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:49:07, skipping insertion in model container [2023-03-30 23:49:07,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:49:07" (3/3) ... [2023-03-30 23:49:07,419 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label23.c [2023-03-30 23:49:07,435 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:49:07,435 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:49:07,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:49:07,528 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;@46e10674, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:49:07,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:49:07,538 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 23:49:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-30 23:49:07,548 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:07,548 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, 1, 1, 1, 1, 1, 1, 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 23:49:07,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:07,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 75592092, now seen corresponding path program 1 times [2023-03-30 23:49:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:07,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866539582] [2023-03-30 23:49:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:08,147 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 23:49:08,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:08,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866539582] [2023-03-30 23:49:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866539582] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:08,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:08,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:49:08,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665443476] [2023-03-30 23:49:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:49:08,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:49:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:49:08,185 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 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 23:49:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:22,169 INFO L93 Difference]: Finished difference Result 6573 states and 12489 transitions. [2023-03-30 23:49:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:49:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 58 [2023-03-30 23:49:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:22,211 INFO L225 Difference]: With dead ends: 6573 [2023-03-30 23:49:22,211 INFO L226 Difference]: Without dead ends: 4728 [2023-03-30 23:49:22,222 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 23:49:22,225 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 7948 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 8425 mSolverCounterSat, 3829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7948 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 12254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3829 IncrementalHoareTripleChecker+Valid, 8425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:22,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7948 Valid, 462 Invalid, 12254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3829 Valid, 8425 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2023-03-30 23:49:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2023-03-30 23:49:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4625. [2023-03-30 23:49:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4570 states have (on average 1.7671772428884027) internal successors, (8076), 4573 states have internal predecessors, (8076), 20 states have call successors, (20), 20 states have call predecessors, (20), 34 states have return successors, (70), 31 states have call predecessors, (70), 19 states have call successors, (70) [2023-03-30 23:49:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 8166 transitions. [2023-03-30 23:49:22,436 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 8166 transitions. Word has length 58 [2023-03-30 23:49:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:22,440 INFO L495 AbstractCegarLoop]: Abstraction has 4625 states and 8166 transitions. [2023-03-30 23:49:22,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 23:49:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 8166 transitions. [2023-03-30 23:49:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-03-30 23:49:22,452 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:22,452 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, 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] [2023-03-30 23:49:22,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:49:22,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:22,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash 712456591, now seen corresponding path program 1 times [2023-03-30 23:49:22,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:22,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744121510] [2023-03-30 23:49:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:22,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:22,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:22,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744121510] [2023-03-30 23:49:22,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744121510] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:22,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:22,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:49:22,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472465898] [2023-03-30 23:49:22,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:22,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:49:22,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:49:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:49:22,919 INFO L87 Difference]: Start difference. First operand 4625 states and 8166 transitions. Second operand has 8 states, 7 states have (on average 18.142857142857142) internal successors, (127), 5 states have internal predecessors, (127), 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 23:49:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:37,676 INFO L93 Difference]: Finished difference Result 17990 states and 32752 transitions. [2023-03-30 23:49:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:49:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.142857142857142) internal successors, (127), 5 states have internal predecessors, (127), 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 133 [2023-03-30 23:49:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:37,753 INFO L225 Difference]: With dead ends: 17990 [2023-03-30 23:49:37,753 INFO L226 Difference]: Without dead ends: 13371 [2023-03-30 23:49:37,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:49:37,773 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 14188 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 12494 mSolverCounterSat, 4003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14188 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 16497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4003 IncrementalHoareTripleChecker+Valid, 12494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:37,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14188 Valid, 1004 Invalid, 16497 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4003 Valid, 12494 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2023-03-30 23:49:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13371 states. [2023-03-30 23:49:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13371 to 13293. [2023-03-30 23:49:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13058 states have (on average 1.5899065706846378) internal successors, (20761), 13081 states have internal predecessors, (20761), 56 states have call successors, (56), 56 states have call predecessors, (56), 178 states have return successors, (814), 155 states have call predecessors, (814), 55 states have call successors, (814) [2023-03-30 23:49:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 21631 transitions. [2023-03-30 23:49:38,127 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 21631 transitions. Word has length 133 [2023-03-30 23:49:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:38,129 INFO L495 AbstractCegarLoop]: Abstraction has 13293 states and 21631 transitions. [2023-03-30 23:49:38,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.142857142857142) internal successors, (127), 5 states have internal predecessors, (127), 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 23:49:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 21631 transitions. [2023-03-30 23:49:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-03-30 23:49:38,135 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:38,135 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, 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] [2023-03-30 23:49:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:49:38,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:38,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash -787514712, now seen corresponding path program 1 times [2023-03-30 23:49:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:38,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691155156] [2023-03-30 23:49:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:38,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691155156] [2023-03-30 23:49:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691155156] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:49:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782241850] [2023-03-30 23:49:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:49:38,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:49:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:49:38,763 INFO L87 Difference]: Start difference. First operand 13293 states and 21631 transitions. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 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)