/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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:50:02,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:50:02,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:50:02,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:50:02,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:50:02,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:50:02,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:50:02,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:50:02,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:50:02,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:50:02,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:50:02,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:50:02,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:50:02,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:50:02,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:50:02,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:50:02,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:50:02,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:50:02,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:50:02,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:50:02,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:50:02,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:50:02,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:50:02,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:50:02,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:50:02,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:50:02,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:50:02,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:50:02,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:50:02,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:50:02,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:50:02,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:50:02,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:50:02,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:50:02,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:50:02,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:50:02,335 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 23:50:02,365 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:50:02,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:50:02,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:50:02,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:50:02,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:50:02,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:50:02,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:50:02,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:50:02,368 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:50:02,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:50:02,369 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:50:02,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:50:02,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:50:02,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:50:02,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:50:02,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:50:02,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:50:02,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:02,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:50:02,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:50:02,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:50:02,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:50:02,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:50:02,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:50:02,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:50:02,372 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:50:02,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:50:02,372 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:50:02,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:50:02,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:50:02,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:50:02,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:50:02,647 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:50:02,647 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:50:02,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label38.c [2023-03-30 23:50:03,869 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:50:04,432 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:50:04,433 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label38.c [2023-03-30 23:50:04,474 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c10759026/979cc23d66a74ff8b8214fd3e9e95951/FLAG5d6d223e1 [2023-03-30 23:50:04,490 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c10759026/979cc23d66a74ff8b8214fd3e9e95951 [2023-03-30 23:50:04,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:50:04,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:50:04,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:04,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:50:04,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:50:04,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:04" (1/1) ... [2023-03-30 23:50:04,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462a42d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:04, skipping insertion in model container [2023-03-30 23:50:04,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:04" (1/1) ... [2023-03-30 23:50:04,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:50:04,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:50:04,958 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_label38.c[7658,7671] [2023-03-30 23:50:06,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:06,029 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:50:06,058 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_label38.c[7658,7671] [2023-03-30 23:50:06,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:06,718 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:50:06,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06 WrapperNode [2023-03-30 23:50:06,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:06,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:50:06,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:50:06,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:50:06,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:06,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:06,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:06,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:07,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:07,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:07,234 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:07,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:07,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:50:07,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:50:07,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:50:07,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:50:07,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (1/1) ... [2023-03-30 23:50:07,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:07,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:50:07,365 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 23:50:07,387 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 23:50:07,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:50:07,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:50:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:50:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:50:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:50:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:50:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:50:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:50:07,498 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:50:07,500 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:50:14,516 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:50:14,540 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:50:14,540 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:50:14,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:14 BoogieIcfgContainer [2023-03-30 23:50:14,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:50:14,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:50:14,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:50:14,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:50:14,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:50:04" (1/3) ... [2023-03-30 23:50:14,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebc3fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:14, skipping insertion in model container [2023-03-30 23:50:14,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:06" (2/3) ... [2023-03-30 23:50:14,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebc3fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:14, skipping insertion in model container [2023-03-30 23:50:14,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:14" (3/3) ... [2023-03-30 23:50:14,553 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label38.c [2023-03-30 23:50:14,568 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:50:14,568 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:50:14,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:50:14,659 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;@c2b941b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:50:14,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:50:14,670 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 23:50:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-30 23:50:14,682 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:14,683 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, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:50:14,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:14,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2110596808, now seen corresponding path program 1 times [2023-03-30 23:50:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:14,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258456288] [2023-03-30 23:50:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:15,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:15,273 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 23:50:15,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258456288] [2023-03-30 23:50:15,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258456288] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:15,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:15,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:50:15,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530393047] [2023-03-30 23:50:15,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:15,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:50:15,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:15,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:50:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:50:15,332 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 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 23:50:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:29,738 INFO L93 Difference]: Finished difference Result 6483 states and 12306 transitions. [2023-03-30 23:50:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:50:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 65 [2023-03-30 23:50:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:29,770 INFO L225 Difference]: With dead ends: 6483 [2023-03-30 23:50:29,770 INFO L226 Difference]: Without dead ends: 4638 [2023-03-30 23:50:29,780 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 23:50:29,783 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 7897 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 9147 mSolverCounterSat, 3639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7897 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 12786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3639 IncrementalHoareTripleChecker+Valid, 9147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:29,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7897 Valid, 495 Invalid, 12786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3639 Valid, 9147 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2023-03-30 23:50:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2023-03-30 23:50:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4629. [2023-03-30 23:50:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6764384161015096) internal successors, (7663), 4574 states have internal predecessors, (7663), 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 23:50:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7760 transitions. [2023-03-30 23:50:30,012 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7760 transitions. Word has length 65 [2023-03-30 23:50:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:30,015 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7760 transitions. [2023-03-30 23:50:30,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 23:50:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7760 transitions. [2023-03-30 23:50:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-03-30 23:50:30,026 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:30,027 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, 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] [2023-03-30 23:50:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:50:30,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:30,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 673354544, now seen corresponding path program 1 times [2023-03-30 23:50:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:30,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731543522] [2023-03-30 23:50:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731543522] [2023-03-30 23:50:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731543522] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:30,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:30,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549420439] [2023-03-30 23:50:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:30,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:30,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:30,570 INFO L87 Difference]: Start difference. First operand 4629 states and 7760 transitions. Second operand has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 4 states have internal predecessors, (148), 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 23:50:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:42,074 INFO L93 Difference]: Finished difference Result 13837 states and 23541 transitions. [2023-03-30 23:50:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:50:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 4 states have internal predecessors, (148), 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 154 [2023-03-30 23:50:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:42,139 INFO L225 Difference]: With dead ends: 13837 [2023-03-30 23:50:42,140 INFO L226 Difference]: Without dead ends: 9214 [2023-03-30 23:50:42,154 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 23:50:42,155 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 8094 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 9996 mSolverCounterSat, 2127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8094 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 12123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2127 IncrementalHoareTripleChecker+Valid, 9996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:42,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8094 Valid, 897 Invalid, 12123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2127 Valid, 9996 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2023-03-30 23:50:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2023-03-30 23:50:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 9059. [2023-03-30 23:50:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9059 states, 8892 states have (on average 1.4507422402159245) internal successors, (12900), 8909 states have internal predecessors, (12900), 38 states have call successors, (38), 38 states have call predecessors, (38), 128 states have return successors, (405), 111 states have call predecessors, (405), 37 states have call successors, (405) [2023-03-30 23:50:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9059 states to 9059 states and 13343 transitions. [2023-03-30 23:50:42,479 INFO L78 Accepts]: Start accepts. Automaton has 9059 states and 13343 transitions. Word has length 154 [2023-03-30 23:50:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:42,481 INFO L495 AbstractCegarLoop]: Abstraction has 9059 states and 13343 transitions. [2023-03-30 23:50:42,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 4 states have internal predecessors, (148), 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 23:50:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9059 states and 13343 transitions. [2023-03-30 23:50:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-03-30 23:50:42,489 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:42,490 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, 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] [2023-03-30 23:50:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:50:42,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:42,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1652196163, now seen corresponding path program 1 times [2023-03-30 23:50:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:42,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222743572] [2023-03-30 23:50:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:42,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:43,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:43,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222743572] [2023-03-30 23:50:43,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222743572] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:43,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:43,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:43,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858932126] [2023-03-30 23:50:43,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:43,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:43,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:43,079 INFO L87 Difference]: Start difference. First operand 9059 states and 13343 transitions. Second operand has 7 states, 6 states have (on average 32.166666666666664) internal successors, (193), 4 states have internal predecessors, (193), 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 23:50:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:53,699 INFO L93 Difference]: Finished difference Result 27892 states and 42475 transitions. [2023-03-30 23:50:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:50:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 32.166666666666664) internal successors, (193), 4 states have internal predecessors, (193), 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 199 [2023-03-30 23:50:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:53,783 INFO L225 Difference]: With dead ends: 27892 [2023-03-30 23:50:53,784 INFO L226 Difference]: Without dead ends: 18839 [2023-03-30 23:50:53,809 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 23:50:53,812 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 11592 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 9609 mSolverCounterSat, 2149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11592 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 11758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2149 IncrementalHoareTripleChecker+Valid, 9609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:53,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11592 Valid, 997 Invalid, 11758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2149 Valid, 9609 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-03-30 23:50:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18839 states. [2023-03-30 23:50:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18839 to 18417. [2023-03-30 23:50:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18417 states, 17885 states have (on average 1.2922560805143974) internal successors, (23112), 17964 states have internal predecessors, (23112), 74 states have call successors, (74), 74 states have call predecessors, (74), 457 states have return successors, (1799), 378 states have call predecessors, (1799), 73 states have call successors, (1799) [2023-03-30 23:50:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18417 states to 18417 states and 24985 transitions. [2023-03-30 23:50:54,274 INFO L78 Accepts]: Start accepts. Automaton has 18417 states and 24985 transitions. Word has length 199 [2023-03-30 23:50:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:54,276 INFO L495 AbstractCegarLoop]: Abstraction has 18417 states and 24985 transitions. [2023-03-30 23:50:54,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 32.166666666666664) internal successors, (193), 4 states have internal predecessors, (193), 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 23:50:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18417 states and 24985 transitions. [2023-03-30 23:50:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-03-30 23:50:54,280 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:54,280 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:50:54,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:50:54,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:54,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1929355084, now seen corresponding path program 1 times [2023-03-30 23:50:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666607935] [2023-03-30 23:50:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:54,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:54,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-03-30 23:50:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 116 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:50:54,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666607935] [2023-03-30 23:50:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666607935] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:50:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833403942] [2023-03-30 23:50:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:54,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:50:54,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:50:54,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:50:54,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:50:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:54,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:50:54,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:50:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-03-30 23:50:55,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:50:55,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833403942] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:55,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:50:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-03-30 23:50:55,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972738281] [2023-03-30 23:50:55,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:55,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:50:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:50:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:50:55,006 INFO L87 Difference]: Start difference. First operand 18417 states and 24985 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)