/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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:50:20,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:50:20,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:50:20,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:50:20,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:50:20,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:50:20,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:50:20,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:50:20,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:50:20,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:50:20,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:50:20,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:50:20,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:50:20,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:50:20,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:50:20,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:50:20,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:50:20,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:50:20,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:50:20,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:50:20,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:50:20,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:50:20,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:50:20,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:50:20,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:50:20,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:50:20,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:50:20,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:50:20,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:50:20,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:50:20,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:50:20,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:50:20,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:50:20,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:50:20,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:50:20,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:50:20,724 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 23:50:20,753 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:50:20,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:50:20,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:50:20,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:50:20,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:50:20,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:50:20,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:50:20,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:50:20,756 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:50:20,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:50:20,757 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:50:20,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:50:20,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:50:20,759 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:50:20,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:50:20,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:50:20,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:50:20,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:50:20,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:20,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:50:20,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:50:20,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:50:20,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:50:20,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:50:20,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:50:20,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:50:20,761 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:50:20,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:50:20,761 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:50:20,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:50:21,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:50:21,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:50:21,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:50:21,034 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:50:21,035 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:50:21,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label41.c [2023-03-30 23:50:22,250 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:50:22,793 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:50:22,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label41.c [2023-03-30 23:50:22,849 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88e94424/e4390965ee5d47f19fe0d6481575f5bb/FLAG1df78efff [2023-03-30 23:50:22,866 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88e94424/e4390965ee5d47f19fe0d6481575f5bb [2023-03-30 23:50:22,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:50:22,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:50:22,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:22,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:50:22,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:50:22,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:22" (1/1) ... [2023-03-30 23:50:22,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae80a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:22, skipping insertion in model container [2023-03-30 23:50:22,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:22" (1/1) ... [2023-03-30 23:50:22,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:50:23,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:50:23,302 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_label41.c[1319,1332] [2023-03-30 23:50:24,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:24,448 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:50:24,465 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_label41.c[1319,1332] [2023-03-30 23:50:25,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:25,236 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:50:25,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25 WrapperNode [2023-03-30 23:50:25,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:25,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:50:25,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:50:25,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:50:25,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:50:25,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:50:25,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:50:25,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:50:25,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (1/1) ... [2023-03-30 23:50:25,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:25,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:50:25,666 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 23:50:25,676 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 23:50:25,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:50:25,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:50:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:50:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:50:25,890 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:50:25,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:50:33,023 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:50:33,051 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:50:33,051 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:50:33,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:33 BoogieIcfgContainer [2023-03-30 23:50:33,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:50:33,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:50:33,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:50:33,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:50:33,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:50:22" (1/3) ... [2023-03-30 23:50:33,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b0c2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:33, skipping insertion in model container [2023-03-30 23:50:33,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:25" (2/3) ... [2023-03-30 23:50:33,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b0c2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:33, skipping insertion in model container [2023-03-30 23:50:33,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:33" (3/3) ... [2023-03-30 23:50:33,068 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label41.c [2023-03-30 23:50:33,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:50:33,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:50:33,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:50:33,180 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;@7bdc2d80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:50:33,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:50:33,189 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 23:50:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-30 23:50:33,196 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:33,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:50:33,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:33,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 972432740, now seen corresponding path program 1 times [2023-03-30 23:50:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:33,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721257438] [2023-03-30 23:50:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:33,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:33,553 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 23:50:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:33,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721257438] [2023-03-30 23:50:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721257438] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:33,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:33,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:50:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122658128] [2023-03-30 23:50:33,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:50:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:33,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:50:33,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:50:33,613 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 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:50:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:48,316 INFO L93 Difference]: Finished difference Result 6479 states and 12300 transitions. [2023-03-30 23:50:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:50:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-03-30 23:50:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:48,358 INFO L225 Difference]: With dead ends: 6479 [2023-03-30 23:50:48,359 INFO L226 Difference]: Without dead ends: 4634 [2023-03-30 23:50:48,376 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 23:50:48,382 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 6147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 11995 mSolverCounterSat, 2910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6147 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 14905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2910 IncrementalHoareTripleChecker+Valid, 11995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:48,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6147 Valid, 504 Invalid, 14905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2910 Valid, 11995 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2023-03-30 23:50:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2023-03-30 23:50:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4626. [2023-03-30 23:50:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4568 states have (on average 1.6786339754816113) internal successors, (7668), 4571 states have internal predecessors, (7668), 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 23:50:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7765 transitions. [2023-03-30 23:50:48,646 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7765 transitions. Word has length 12 [2023-03-30 23:50:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:48,648 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7765 transitions. [2023-03-30 23:50:48,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:50:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7765 transitions. [2023-03-30 23:50:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-30 23:50:48,653 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:48,653 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:50:48,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:50:48,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:48,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash -253642430, now seen corresponding path program 1 times [2023-03-30 23:50:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:48,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706956962] [2023-03-30 23:50:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:49,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:49,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706956962] [2023-03-30 23:50:49,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706956962] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:49,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597140495] [2023-03-30 23:50:49,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:49,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:50:49,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:50:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:50:49,067 INFO L87 Difference]: Start difference. First operand 4626 states and 7765 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 23:51:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:07,937 INFO L93 Difference]: Finished difference Result 22107 states and 38124 transitions. [2023-03-30 23:51:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:51:07,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 85 [2023-03-30 23:51:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:08,021 INFO L225 Difference]: With dead ends: 22107 [2023-03-30 23:51:08,021 INFO L226 Difference]: Without dead ends: 17487 [2023-03-30 23:51:08,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:51:08,042 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 11770 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 13045 mSolverCounterSat, 3900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11770 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 16945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3900 IncrementalHoareTripleChecker+Valid, 13045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11770 Valid, 781 Invalid, 16945 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3900 Valid, 13045 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time] [2023-03-30 23:51:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17487 states. [2023-03-30 23:51:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17487 to 17464. [2023-03-30 23:51:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17464 states, 17244 states have (on average 1.4197401994896777) internal successors, (24482), 17256 states have internal predecessors, (24482), 74 states have call successors, (74), 74 states have call predecessors, (74), 145 states have return successors, (764), 133 states have call predecessors, (764), 73 states have call successors, (764) [2023-03-30 23:51:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17464 states to 17464 states and 25320 transitions. [2023-03-30 23:51:08,547 INFO L78 Accepts]: Start accepts. Automaton has 17464 states and 25320 transitions. Word has length 85 [2023-03-30 23:51:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:08,548 INFO L495 AbstractCegarLoop]: Abstraction has 17464 states and 25320 transitions. [2023-03-30 23:51:08,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 23:51:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17464 states and 25320 transitions. [2023-03-30 23:51:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-30 23:51:08,557 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:08,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:08,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:51:08,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:08,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash 332845307, now seen corresponding path program 1 times [2023-03-30 23:51:08,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:08,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188878836] [2023-03-30 23:51:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:08,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:09,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:09,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188878836] [2023-03-30 23:51:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188878836] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:09,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:09,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:51:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597441619] [2023-03-30 23:51:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:09,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:51:09,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:51:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:09,023 INFO L87 Difference]: Start difference. First operand 17464 states and 25320 transitions. Second operand has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 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)