/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:13:28,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:13:28,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:13:28,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:13:28,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:13:28,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:13:28,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:13:28,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:13:28,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:13:28,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:13:28,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:13:28,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:13:28,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:13:28,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:13:28,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:13:28,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:13:28,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:13:28,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:13:28,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:13:28,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:13:28,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:13:28,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:13:28,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:13:28,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:13:28,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:13:28,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:13:28,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:13:28,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:13:28,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:13:28,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:13:28,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:13:28,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:13:28,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:13:28,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:13:28,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:13:28,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:13:28,869 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 [2023-03-31 22:13:28,891 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:13:28,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:13:28,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:13:28,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:13:28,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:13:28,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:13:28,893 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:13:28,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:13:28,893 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:13:28,894 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:13:28,894 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:13:28,894 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:13:28,894 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:13:28,894 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:13:28,894 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:13:28,895 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:13:28,895 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:13:28,895 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:13:28,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:13:28,896 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:13:28,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:13:28,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:13:28,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:13:28,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:13:28,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:13:28,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:13:28,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:13:28,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:13:28,902 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:13:28,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:13:28,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:13:28,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:13:28,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:13:28,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:13:28,903 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:13:28,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:13:28,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:13:28,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:13:28,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:13:28,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:13:28,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:13:28,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:13:29,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:13:29,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:13:29,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:13:29,129 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:13:29,130 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:13:29,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label42.c [2023-03-31 22:13:30,268 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:13:30,662 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:13:30,663 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label42.c [2023-03-31 22:13:30,681 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28fd8a24/71deade0f9f8402181368e9e9bb2d72d/FLAG27ec20102 [2023-03-31 22:13:30,700 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28fd8a24/71deade0f9f8402181368e9e9bb2d72d [2023-03-31 22:13:30,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:13:30,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:13:30,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:13:30,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:13:30,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:13:30,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:13:30" (1/1) ... [2023-03-31 22:13:30,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@563767b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:30, skipping insertion in model container [2023-03-31 22:13:30,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:13:30" (1/1) ... [2023-03-31 22:13:30,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:13:30,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:13:30,968 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/Problem15_label42.c[5695,5708] [2023-03-31 22:13:31,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:13:31,325 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:13:31,351 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/Problem15_label42.c[5695,5708] [2023-03-31 22:13:31,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:13:31,597 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:13:31,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31 WrapperNode [2023-03-31 22:13:31,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:13:31,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:13:31,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:13:31,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:13:31,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,734 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:13:31,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:13:31,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:13:31,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:13:31,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (1/1) ... [2023-03-31 22:13:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:13:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:31,801 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) [2023-03-31 22:13:31,821 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 [2023-03-31 22:13:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:13:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:13:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:13:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:13:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:13:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:13:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:13:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:13:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:13:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:13:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:13:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:13:31,904 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:13:31,906 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:13:34,289 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:13:35,052 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:13:35,053 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:13:35,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:13:35 BoogieIcfgContainer [2023-03-31 22:13:35,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:13:35,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:13:35,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:13:35,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:13:35,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:13:30" (1/3) ... [2023-03-31 22:13:35,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388ac089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:13:35, skipping insertion in model container [2023-03-31 22:13:35,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:31" (2/3) ... [2023-03-31 22:13:35,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388ac089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:13:35, skipping insertion in model container [2023-03-31 22:13:35,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:13:35" (3/3) ... [2023-03-31 22:13:35,064 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2023-03-31 22:13:35,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:13:35,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:13:35,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:13:35,151 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;@61d838e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:13:35,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:13:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:13:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:13:35,163 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:35,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:35,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:35,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash 271519939, now seen corresponding path program 1 times [2023-03-31 22:13:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:35,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574439067] [2023-03-31 22:13:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:35,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:35,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:35,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574439067] [2023-03-31 22:13:35,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574439067] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:35,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:35,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:13:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149961183] [2023-03-31 22:13:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:13:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:13:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:35,521 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 22:13:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:37,071 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:13:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-03-31 22:13:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:37,087 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:13:37,087 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:13:37,092 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 [2023-03-31 22:13:37,095 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:37,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 22:13:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:13:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:13:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:13:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-03-31 22:13:37,155 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-03-31 22:13:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:37,155 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-03-31 22:13:37,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 22:13:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-03-31 22:13:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:13:37,157 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:37,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:37,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:13:37,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:37,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1792625605, now seen corresponding path program 1 times [2023-03-31 22:13:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577666357] [2023-03-31 22:13:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:37,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577666357] [2023-03-31 22:13:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577666357] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:13:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185774923] [2023-03-31 22:13:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:37,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:13:37,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:13:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:37,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:13:37,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:13:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:37,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:13:37,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185774923] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:37,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:13:37,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 22:13:37,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813731048] [2023-03-31 22:13:37,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:37,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:13:37,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:13:37,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:13:37,869 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-03-31 22:13:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:39,986 INFO L93 Difference]: Finished difference Result 1171 states and 1783 transitions. [2023-03-31 22:13:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:13:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-03-31 22:13:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:39,995 INFO L225 Difference]: With dead ends: 1171 [2023-03-31 22:13:39,995 INFO L226 Difference]: Without dead ends: 707 [2023-03-31 22:13:39,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:13:39,997 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 683 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:39,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 48 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-31 22:13:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-03-31 22:13:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 700. [2023-03-31 22:13:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 686 states have (on average 1.4431486880466473) internal successors, (990), 689 states have internal predecessors, (990), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-31 22:13:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1009 transitions. [2023-03-31 22:13:40,031 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1009 transitions. Word has length 21 [2023-03-31 22:13:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:40,032 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1009 transitions. [2023-03-31 22:13:40,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-03-31 22:13:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1009 transitions. [2023-03-31 22:13:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:13:40,033 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:40,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:40,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:13:40,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:40,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:40,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash 834513198, now seen corresponding path program 1 times [2023-03-31 22:13:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:40,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068507057] [2023-03-31 22:13:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:40,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:40,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068507057] [2023-03-31 22:13:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068507057] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:40,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:40,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:13:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225145165] [2023-03-31 22:13:40,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:40,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:13:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:13:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:13:40,330 INFO L87 Difference]: Start difference. First operand 700 states and 1009 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-03-31 22:13:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:42,270 INFO L93 Difference]: Finished difference Result 1662 states and 2557 transitions. [2023-03-31 22:13:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:13:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26 [2023-03-31 22:13:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:42,280 INFO L225 Difference]: With dead ends: 1662 [2023-03-31 22:13:42,280 INFO L226 Difference]: Without dead ends: 1192 [2023-03-31 22:13:42,282 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 [2023-03-31 22:13:42,285 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 49 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 22:13:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2023-03-31 22:13:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 943. [2023-03-31 22:13:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 920 states have (on average 1.3706521739130435) internal successors, (1261), 927 states have internal predecessors, (1261), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2023-03-31 22:13:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1295 transitions. [2023-03-31 22:13:42,336 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1295 transitions. Word has length 26 [2023-03-31 22:13:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:42,336 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1295 transitions. [2023-03-31 22:13:42,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-03-31 22:13:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1295 transitions. [2023-03-31 22:13:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 22:13:42,338 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:42,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:42,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:13:42,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:42,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1535314621, now seen corresponding path program 1 times [2023-03-31 22:13:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:42,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539725789] [2023-03-31 22:13:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:42,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:42,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539725789] [2023-03-31 22:13:42,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539725789] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:42,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:42,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:13:42,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31448130] [2023-03-31 22:13:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:42,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:13:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:13:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:42,482 INFO L87 Difference]: Start difference. First operand 943 states and 1295 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:13:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:43,761 INFO L93 Difference]: Finished difference Result 2351 states and 3369 transitions. [2023-03-31 22:13:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-03-31 22:13:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:43,768 INFO L225 Difference]: With dead ends: 2351 [2023-03-31 22:13:43,768 INFO L226 Difference]: Without dead ends: 1413 [2023-03-31 22:13:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:43,771 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:43,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 407 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:13:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2023-03-31 22:13:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1404. [2023-03-31 22:13:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1374 states have (on average 1.2976710334788937) internal successors, (1783), 1384 states have internal predecessors, (1783), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (52), 9 states have call predecessors, (52), 9 states have call successors, (52) [2023-03-31 22:13:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1845 transitions. [2023-03-31 22:13:43,801 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1845 transitions. Word has length 47 [2023-03-31 22:13:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:43,801 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1845 transitions. [2023-03-31 22:13:43,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:13:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1845 transitions. [2023-03-31 22:13:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:13:43,803 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:43,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:13:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:13:43,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:43,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1025204302, now seen corresponding path program 1 times [2023-03-31 22:13:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:43,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790998282] [2023-03-31 22:13:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:43,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:13:44,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790998282] [2023-03-31 22:13:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790998282] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:13:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795631406] [2023-03-31 22:13:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:44,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:44,137 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) [2023-03-31 22:13:44,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:13:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:44,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:13:44,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:13:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:13:44,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:13:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:13:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795631406] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:13:44,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:13:44,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-03-31 22:13:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511552167] [2023-03-31 22:13:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:13:44,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:13:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:13:44,591 INFO L87 Difference]: Start difference. First operand 1404 states and 1845 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:13:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:46,371 INFO L93 Difference]: Finished difference Result 3765 states and 5060 transitions. [2023-03-31 22:13:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:13:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2023-03-31 22:13:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:46,381 INFO L225 Difference]: With dead ends: 3765 [2023-03-31 22:13:46,381 INFO L226 Difference]: Without dead ends: 2366 [2023-03-31 22:13:46,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:13:46,386 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 465 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:46,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 43 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:13:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2023-03-31 22:13:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2354. [2023-03-31 22:13:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2297 states have (on average 1.2067914671310405) internal successors, (2772), 2322 states have internal predecessors, (2772), 16 states have call successors, (16), 16 states have call predecessors, (16), 40 states have return successors, (101), 15 states have call predecessors, (101), 15 states have call successors, (101) [2023-03-31 22:13:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 2889 transitions. [2023-03-31 22:13:46,442 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 2889 transitions. Word has length 60 [2023-03-31 22:13:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:46,444 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 2889 transitions. [2023-03-31 22:13:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:13:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 2889 transitions. [2023-03-31 22:13:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-03-31 22:13:46,448 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:46,448 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:46,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:13:46,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:46,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:46,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -668353970, now seen corresponding path program 1 times [2023-03-31 22:13:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:46,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413006156] [2023-03-31 22:13:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:47,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413006156] [2023-03-31 22:13:47,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413006156] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:13:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144471611] [2023-03-31 22:13:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:47,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:47,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:13:47,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:13:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:47,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:13:47,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:13:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:47,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:13:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144471611] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:13:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190663734] [2023-03-31 22:13:47,384 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:13:47,384 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:13:47,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:13:47,391 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:13:47,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:13:47,501 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:13:47,789 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 22:13:48,088 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5985 conjuctions. This might take some time... [2023-03-31 22:13:48,162 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 98 conjuctions. [2023-03-31 22:13:48,208 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 22:13:48,295 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7857 conjuctions. This might take some time... [2023-03-31 22:13:48,422 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 200 conjuctions. [2023-03-31 22:13:49,449 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:13:49,569 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 22:13:49,858 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5579 conjuctions. This might take some time... [2023-03-31 22:13:49,954 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 98 conjuctions. [2023-03-31 22:13:58,542 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21