/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:11:54,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:11:54,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:11:54,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:11:54,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:11:54,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:11:54,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:11:54,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:11:54,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:11:54,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:11:54,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:11:54,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:11:54,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:11:54,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:11:54,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:11:54,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:11:54,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:11:54,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:11:54,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:11:54,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:11:54,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:11:54,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:11:54,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:11:54,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:11:54,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:11:54,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:11:54,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:11:54,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:11:54,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:11:54,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:11:54,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:11:54,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:11:54,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:11:54,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:11:54,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:11:54,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:11:54,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:11:54,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:11:54,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:11:54,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:11:54,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:11:54,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:11:54,990 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:11:54,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:11:54,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:11:54,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:11:54,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:11:54,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:11:54,992 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:11:54,992 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:11:54,992 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:11:54,992 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:11:54,993 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:11:54,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:11:54,993 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:11:54,993 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:11:54,994 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:11:54,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:11:54,994 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:11:54,994 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:11:54,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:11:54,995 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:11:54,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:11:54,996 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:11:54,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:11:54,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:11:54,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:11:54,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:54,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:11:54,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:11:55,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:11:55,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:11:55,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:11:55,276 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:11:55,277 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:11:55,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label32.c [2023-04-01 03:11:56,574 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:11:56,584 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException at org.eclipse.cdt.internal.core.model.PathEntry.kindFromString(PathEntry.java:80) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.decodePathEntry(DefaultPathEntryStore.java:127) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.getRawPathEntries(DefaultPathEntryStore.java:97) at org.eclipse.cdt.internal.core.model.PathEntryStoreProxy.getRawPathEntries(PathEntryStoreProxy.java:102) at org.eclipse.cdt.internal.core.model.PathEntryManager.getRawPathEntries(PathEntryManager.java:666) at org.eclipse.cdt.core.model.CoreModel.getRawPathEntries(CoreModel.java:937) at org.eclipse.cdt.core.model.CoreModel.oldIsScannerInformationEmpty(CoreModel.java:1307) at org.eclipse.cdt.core.model.CoreModel.isScannerInformationEmpty(CoreModel.java:1252) at org.eclipse.cdt.internal.core.pdom.indexer.ProjectIndexerInputAdapter.isFileBuildConfigured(ProjectIndexerInputAdapter.java:267) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.isRequiredInIndex(AbstractIndexerTask.java:748) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.extractFiles(AbstractIndexerTask.java:667) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:558) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 03:11:56,809 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:11:56,809 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label32.c [2023-04-01 03:11:56,819 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcbecf7b/ea0acd6a85b1496687c261255cc79100/FLAG9e67c34cf [2023-04-01 03:11:57,121 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcbecf7b/ea0acd6a85b1496687c261255cc79100 [2023-04-01 03:11:57,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:11:57,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:11:57,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:57,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:11:57,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:11:57,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db7d836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57, skipping insertion in model container [2023-04-01 03:11:57,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:11:57,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:11:57,468 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/Problem01_label32.c[14752,14765] [2023-04-01 03:11:57,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:57,552 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:11:57,663 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/Problem01_label32.c[14752,14765] [2023-04-01 03:11:57,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:57,712 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:11:57,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57 WrapperNode [2023-04-01 03:11:57,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:57,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:11:57,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:11:57,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:11:57,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:11:57,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:11:57,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:11:57,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:11:57,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (1/1) ... [2023-04-01 03:11:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:57,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:57,939 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) [2023-04-01 03:11:57,942 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 [2023-04-01 03:11:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:11:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:11:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:11:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:11:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:11:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:11:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:11:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:11:58,083 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:11:58,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:11:59,049 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:11:59,255 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:11:59,255 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:11:59,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:59 BoogieIcfgContainer [2023-04-01 03:11:59,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:11:59,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:11:59,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:11:59,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:11:59,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:11:57" (1/3) ... [2023-04-01 03:11:59,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74915956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:59, skipping insertion in model container [2023-04-01 03:11:59,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:57" (2/3) ... [2023-04-01 03:11:59,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74915956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:59, skipping insertion in model container [2023-04-01 03:11:59,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:59" (3/3) ... [2023-04-01 03:11:59,265 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label32.c [2023-04-01 03:11:59,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:11:59,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:11:59,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:11:59,328 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=FINITE_AUTOMATA, 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;@24715d08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:11:59,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:11:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:11:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:11:59,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:59,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:11:59,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:59,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2062220205, now seen corresponding path program 1 times [2023-04-01 03:11:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022201795] [2023-04-01 03:11:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:59,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:59,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022201795] [2023-04-01 03:11:59,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022201795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:59,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:59,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:11:59,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995576141] [2023-04-01 03:11:59,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:59,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:59,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:11:59,926 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-04-01 03:12:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:12:00,301 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:12:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:12:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 03:12:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:12:00,310 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:12:00,310 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:12:00,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:12:00,315 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:12:00,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:12:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:12:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:12:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:12:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 03:12:00,351 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 03:12:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:12:00,352 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 03:12:00,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-04-01 03:12:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 03:12:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:12:00,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:12:00,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:12:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:12:00,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:12:00,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:12:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1425665287, now seen corresponding path program 1 times [2023-04-01 03:12:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:12:00,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225263376] [2023-04-01 03:12:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:12:00,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:12:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:12:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:12:00,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:12:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225263376] [2023-04-01 03:12:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225263376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:12:00,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:12:00,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:12:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674000010] [2023-04-01 03:12:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:12:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:12:00,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:12:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:12:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:12:00,539 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2023-04-01 03:12:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:12:00,911 INFO L93 Difference]: Finished difference Result 483 states and 860 transitions. [2023-04-01 03:12:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:12:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 86 [2023-04-01 03:12:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:12:00,918 INFO L225 Difference]: With dead ends: 483 [2023-04-01 03:12:00,918 INFO L226 Difference]: Without dead ends: 331 [2023-04-01 03:12:00,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:12:00,926 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:12:00,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 43 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:12:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-04-01 03:12:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 315. [2023-04-01 03:12:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 299 states have (on average 1.645484949832776) internal successors, (492), 303 states have internal predecessors, (492), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 03:12:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 519 transitions. [2023-04-01 03:12:00,966 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 519 transitions. Word has length 86 [2023-04-01 03:12:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:12:00,966 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 519 transitions. [2023-04-01 03:12:00,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2023-04-01 03:12:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 519 transitions. [2023-04-01 03:12:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 03:12:00,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:12:00,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:12:00,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:12:00,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:12:00,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:12:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1320276837, now seen corresponding path program 1 times [2023-04-01 03:12:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:12:00,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531420666] [2023-04-01 03:12:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:12:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:12:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:12:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:12:01,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:12:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531420666] [2023-04-01 03:12:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531420666] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:12:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907773256] [2023-04-01 03:12:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:12:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:12:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:12:01,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:12:01,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:12:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:12:01,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:12:01,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:12:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 03:12:01,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:12:01,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907773256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:12:01,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:12:01,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:12:01,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633364176] [2023-04-01 03:12:01,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:12:01,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:12:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:12:01,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:12:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:12:01,508 INFO L87 Difference]: Start difference. First operand 315 states and 519 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:12:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:12:01,938 INFO L93 Difference]: Finished difference Result 969 states and 1680 transitions. [2023-04-01 03:12:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:12:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 100 [2023-04-01 03:12:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:12:01,946 INFO L225 Difference]: With dead ends: 969 [2023-04-01 03:12:01,946 INFO L226 Difference]: Without dead ends: 659 [2023-04-01 03:12:01,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 03:12:01,950 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 267 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:12:01,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 35 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:12:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-04-01 03:12:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 637. [2023-04-01 03:12:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 602 states have (on average 1.601328903654485) internal successors, (964), 617 states have internal predecessors, (964), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (77), 9 states have call predecessors, (77), 9 states have call successors, (77) [2023-04-01 03:12:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1051 transitions. [2023-04-01 03:12:02,001 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1051 transitions. Word has length 100 [2023-04-01 03:12:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:12:02,002 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1051 transitions. [2023-04-01 03:12:02,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:12:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1051 transitions. [2023-04-01 03:12:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:12:02,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:12:02,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:12:02,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:12:02,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:12:02,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:12:02,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:12:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1574115517, now seen corresponding path program 1 times [2023-04-01 03:12:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:12:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865457629] [2023-04-01 03:12:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:12:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:12:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:12:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:12:02,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:12:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865457629] [2023-04-01 03:12:02,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865457629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:12:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028367007] [2023-04-01 03:12:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:12:02,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:12:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:12:02,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:12:02,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:12:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:12:02,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:12:02,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:12:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:12:02,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:12:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:12:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028367007] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:12:02,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224106127] [2023-04-01 03:12:02,728 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:12:02,729 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:12:02,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:12:02,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:12:02,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:12:03,047 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:12:27,045 WARN L223 SmtUtils]: Spent 21.33s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 03:13:00,077 WARN L223 SmtUtils]: Spent 20.92s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)