/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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:48:37,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:48:37,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:48:37,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:48:37,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:48:37,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:48:38,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:48:38,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:48:38,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:48:38,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:48:38,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:48:38,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:48:38,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:48:38,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:48:38,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:48:38,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:48:38,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:48:38,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:48:38,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:48:38,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:48:38,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:48:38,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:48:38,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:48:38,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:48:38,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:48:38,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:48:38,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:48:38,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:48:38,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:48:38,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:48:38,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:48:38,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:48:38,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:48:38,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:48:38,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:48:38,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:48:38,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:48:38,078 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:48:38,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:48:38,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:48:38,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:48:38,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:48:38,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:48:38,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:48:38,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:48:38,081 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:48:38,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:48:38,082 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:48:38,083 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:48:38,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:48:38,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:48:38,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:48:38,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:48:38,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:38,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:48:38,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:48:38,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:48:38,086 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:48:38,086 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:48:38,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:48:38,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:48:38,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:48:38,330 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:48:38,330 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:48:38,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label18.c [2023-03-30 23:48:39,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:48:39,951 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:48:39,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label18.c [2023-03-30 23:48:39,993 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7836a7f/cc602724a6d3491f84a702b48b76c393/FLAGf9d4a6bb9 [2023-03-30 23:48:40,008 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7836a7f/cc602724a6d3491f84a702b48b76c393 [2023-03-30 23:48:40,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:48:40,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:48:40,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:40,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:48:40,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:48:40,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:40" (1/1) ... [2023-03-30 23:48:40,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21905f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:40, skipping insertion in model container [2023-03-30 23:48:40,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:40" (1/1) ... [2023-03-30 23:48:40,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:48:40,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:48:40,482 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_label18.c[4201,4214] [2023-03-30 23:48:41,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:41,612 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:48:41,637 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_label18.c[4201,4214] [2023-03-30 23:48:42,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:42,299 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:48:42,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42 WrapperNode [2023-03-30 23:48:42,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:42,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:48:42,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:48:42,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:48:42,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,729 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:48:42,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:48:42,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:48:42,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:48:42,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (1/1) ... [2023-03-30 23:48:42,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:42,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:48:42,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:48:42,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:48:42,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:48:42,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:48:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:48:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:48:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:48:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:48:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:48:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:48:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:48:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:48:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:48:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:48:43,057 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:48:43,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:48:50,729 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:48:50,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:48:50,753 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:48:50,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:50 BoogieIcfgContainer [2023-03-30 23:48:50,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:48:50,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:48:50,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:48:50,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:48:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:48:40" (1/3) ... [2023-03-30 23:48:50,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b98c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:50, skipping insertion in model container [2023-03-30 23:48:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:42" (2/3) ... [2023-03-30 23:48:50,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b98c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:50, skipping insertion in model container [2023-03-30 23:48:50,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:50" (3/3) ... [2023-03-30 23:48:50,766 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label18.c [2023-03-30 23:48:50,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:48:50,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:48:50,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:48:50,906 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;@7db9321f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:48:50,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:48:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:48:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-30 23:48:50,927 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:50,927 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] [2023-03-30 23:48:50,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:50,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash -756864060, now seen corresponding path program 1 times [2023-03-30 23:48:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:50,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405056974] [2023-03-30 23:48:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:50,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405056974] [2023-03-30 23:48:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405056974] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:51,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:51,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:48:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732649527] [2023-03-30 23:48:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:51,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:48:51,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:51,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:48:51,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:48:51,488 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 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:49:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:05,909 INFO L93 Difference]: Finished difference Result 6573 states and 12489 transitions. [2023-03-30 23:49:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:49:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 36 [2023-03-30 23:49:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:05,951 INFO L225 Difference]: With dead ends: 6573 [2023-03-30 23:49:05,952 INFO L226 Difference]: Without dead ends: 4728 [2023-03-30 23:49:05,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:05,970 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 7970 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 8425 mSolverCounterSat, 3829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7970 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 12254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3829 IncrementalHoareTripleChecker+Valid, 8425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:05,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7970 Valid, 462 Invalid, 12254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3829 Valid, 8425 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2023-03-30 23:49:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2023-03-30 23:49:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4625. [2023-03-30 23:49:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4570 states have (on average 1.7671772428884027) internal successors, (8076), 4573 states have internal predecessors, (8076), 20 states have call successors, (20), 20 states have call predecessors, (20), 34 states have return successors, (70), 31 states have call predecessors, (70), 19 states have call successors, (70) [2023-03-30 23:49:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 8166 transitions. [2023-03-30 23:49:06,213 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 8166 transitions. Word has length 36 [2023-03-30 23:49:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:06,214 INFO L495 AbstractCegarLoop]: Abstraction has 4625 states and 8166 transitions. [2023-03-30 23:49:06,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:49:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 8166 transitions. [2023-03-30 23:49:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-03-30 23:49:06,225 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:06,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:49:06,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:06,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1735092585, now seen corresponding path program 1 times [2023-03-30 23:49:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:06,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593084576] [2023-03-30 23:49:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:06,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593084576] [2023-03-30 23:49:06,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593084576] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:06,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:06,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:49:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541040308] [2023-03-30 23:49:06,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:49:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:49:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:49:06,691 INFO L87 Difference]: Start difference. First operand 4625 states and 8166 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 5 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:20,949 INFO L93 Difference]: Finished difference Result 17990 states and 32752 transitions. [2023-03-30 23:49:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:49:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 5 states have internal predecessors, (105), 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 111 [2023-03-30 23:49:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:21,015 INFO L225 Difference]: With dead ends: 17990 [2023-03-30 23:49:21,015 INFO L226 Difference]: Without dead ends: 13371 [2023-03-30 23:49:21,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:49:21,033 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 14192 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 12496 mSolverCounterSat, 4003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14192 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 16499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4003 IncrementalHoareTripleChecker+Valid, 12496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:21,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14192 Valid, 1004 Invalid, 16499 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4003 Valid, 12496 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2023-03-30 23:49:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13371 states. [2023-03-30 23:49:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13371 to 13293. [2023-03-30 23:49:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13058 states have (on average 1.5899831520906724) internal successors, (20762), 13081 states have internal predecessors, (20762), 56 states have call successors, (56), 56 states have call predecessors, (56), 178 states have return successors, (814), 155 states have call predecessors, (814), 55 states have call successors, (814) [2023-03-30 23:49:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 21632 transitions. [2023-03-30 23:49:21,520 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 21632 transitions. Word has length 111 [2023-03-30 23:49:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:21,522 INFO L495 AbstractCegarLoop]: Abstraction has 13293 states and 21632 transitions. [2023-03-30 23:49:21,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 5 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 21632 transitions. [2023-03-30 23:49:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-03-30 23:49:21,526 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:21,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:21,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:49:21,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:21,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1374158795, now seen corresponding path program 1 times [2023-03-30 23:49:21,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:21,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407426808] [2023-03-30 23:49:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:21,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:21,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:21,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407426808] [2023-03-30 23:49:21,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407426808] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:21,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:21,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:49:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390134337] [2023-03-30 23:49:21,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:49:21,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:49:21,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:21,946 INFO L87 Difference]: Start difference. First operand 13293 states and 21632 transitions. Second operand has 7 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:33,020 INFO L93 Difference]: Finished difference Result 40492 states and 68414 transitions. [2023-03-30 23:49:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:49:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 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 117 [2023-03-30 23:49:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:33,137 INFO L225 Difference]: With dead ends: 40492 [2023-03-30 23:49:33,137 INFO L226 Difference]: Without dead ends: 27205 [2023-03-30 23:49:33,171 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 23:49:33,174 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 11284 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 10150 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11284 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 10966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 10150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:33,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11284 Valid, 898 Invalid, 10966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 10150 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2023-03-30 23:49:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27205 states. [2023-03-30 23:49:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27205 to 26838. [2023-03-30 23:49:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26838 states, 26178 states have (on average 1.5346856138742455) internal successors, (40175), 26275 states have internal predecessors, (40175), 110 states have call successors, (110), 110 states have call predecessors, (110), 549 states have return successors, (3055), 452 states have call predecessors, (3055), 109 states have call successors, (3055) [2023-03-30 23:49:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26838 states to 26838 states and 43340 transitions. [2023-03-30 23:49:33,849 INFO L78 Accepts]: Start accepts. Automaton has 26838 states and 43340 transitions. Word has length 117 [2023-03-30 23:49:33,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:33,851 INFO L495 AbstractCegarLoop]: Abstraction has 26838 states and 43340 transitions. [2023-03-30 23:49:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26838 states and 43340 transitions. [2023-03-30 23:49:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-03-30 23:49:33,860 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:33,860 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:33,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:49:33,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:33,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1598922202, now seen corresponding path program 1 times [2023-03-30 23:49:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718027755] [2023-03-30 23:49:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat