/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/Problem03_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:19:19,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:19:19,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:19:19,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:19:19,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:19:19,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:19:19,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:19:19,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:19:19,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:19:19,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:19:19,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:19:19,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:19:19,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:19:19,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:19:19,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:19:19,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:19:19,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:19:19,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:19:19,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:19:19,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:19:19,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:19:19,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:19:19,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:19:19,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:19:19,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:19:19,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:19:19,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:19:19,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:19:19,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:19:19,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:19:19,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:19:19,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:19:19,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:19:19,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:19:19,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:19:19,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:19:19,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:19:19,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:19:19,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:19:19,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:19:19,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:19:19,934 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 21:19:19,966 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:19:19,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:19:19,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:19:19,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:19:19,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:19:19,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:19:19,967 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:19:19,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:19:19,967 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:19:19,967 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:19:19,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:19:19,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:19:19,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:19:19,969 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:19:19,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:19:19,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:19:19,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:19:19,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:19:19,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:19:19,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:19:19,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:19:19,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:19:19,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:19:19,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:19:20,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:19:20,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:19:20,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:19:20,190 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:19:20,191 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:19:20,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2023-03-31 21:19:21,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:19:21,701 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:19:21,701 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2023-03-31 21:19:21,716 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ef0c432/d2095d3467be40f48daaf0a81207c497/FLAG8f9badcb4 [2023-03-31 21:19:21,910 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ef0c432/d2095d3467be40f48daaf0a81207c497 [2023-03-31 21:19:21,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:19:21,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:19:21,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:19:21,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:19:21,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:19:21,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:19:21" (1/1) ... [2023-03-31 21:19:21,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36becb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:21, skipping insertion in model container [2023-03-31 21:19:21,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:19:21" (1/1) ... [2023-03-31 21:19:21,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:19:21,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:19:22,463 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/Problem03_label21.c[61500,61513] [2023-03-31 21:19:22,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:19:22,508 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:19:22,762 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/Problem03_label21.c[61500,61513] [2023-03-31 21:19:22,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:19:22,787 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:19:22,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22 WrapperNode [2023-03-31 21:19:22,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:19:22,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:19:22,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:19:22,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:19:22,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:19:22,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:19:22,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:19:22,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:19:22,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (1/1) ... [2023-03-31 21:19:22,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:19:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:22,980 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 21:19:22,983 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 21:19:23,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:19:23,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:19:23,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:19:23,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:19:23,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:19:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:19:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:19:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:19:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:19:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:19:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:19:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:19:23,133 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:19:23,135 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:19:24,560 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:19:24,855 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:19:24,855 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:19:24,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:19:24 BoogieIcfgContainer [2023-03-31 21:19:24,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:19:24,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:19:24,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:19:24,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:19:24,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:19:21" (1/3) ... [2023-03-31 21:19:24,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38406840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:19:24, skipping insertion in model container [2023-03-31 21:19:24,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:22" (2/3) ... [2023-03-31 21:19:24,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38406840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:19:24, skipping insertion in model container [2023-03-31 21:19:24,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:19:24" (3/3) ... [2023-03-31 21:19:24,866 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2023-03-31 21:19:24,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:19:24,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:19:24,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:19:24,941 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;@16a91566, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:19:24,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:19:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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) [2023-03-31 21:19:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:19:24,964 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:24,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:24,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:24,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash 729868183, now seen corresponding path program 1 times [2023-03-31 21:19:24,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:24,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3812102] [2023-03-31 21:19:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:24,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:26,121 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 21:19:26,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:26,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3812102] [2023-03-31 21:19:26,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3812102] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:26,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:26,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:19:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967786524] [2023-03-31 21:19:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:19:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:19:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:19:26,162 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 21:19:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:26,843 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:19:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:19:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-03-31 21:19:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:26,856 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:19:26,856 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:19:26,859 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 21:19:26,862 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:26,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:19:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:19:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:19:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 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) [2023-03-31 21:19:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-03-31 21:19:26,912 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-03-31 21:19:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:26,913 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-03-31 21:19:26,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 21:19:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-03-31 21:19:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-03-31 21:19:26,916 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:26,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:26,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:19:26,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:26,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1924214829, now seen corresponding path program 1 times [2023-03-31 21:19:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:26,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508459239] [2023-03-31 21:19:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:26,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:27,963 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 21:19:27,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:27,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508459239] [2023-03-31 21:19:27,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508459239] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:27,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037228331] [2023-03-31 21:19:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:27,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:27,967 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 21:19:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:28,851 INFO L93 Difference]: Finished difference Result 913 states and 1744 transitions. [2023-03-31 21:19:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:19:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-03-31 21:19:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:28,857 INFO L225 Difference]: With dead ends: 913 [2023-03-31 21:19:28,857 INFO L226 Difference]: Without dead ends: 617 [2023-03-31 21:19:28,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:19:28,860 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 455 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:28,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 57 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:19:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-03-31 21:19:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 607. [2023-03-31 21:19:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 589 states have (on average 1.8234295415959254) internal successors, (1074), 595 states have internal predecessors, (1074), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2023-03-31 21:19:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1104 transitions. [2023-03-31 21:19:28,894 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1104 transitions. Word has length 157 [2023-03-31 21:19:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:28,894 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 1104 transitions. [2023-03-31 21:19:28,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 21:19:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1104 transitions. [2023-03-31 21:19:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 21:19:28,898 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:28,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:28,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:19:28,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:28,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:28,900 INFO L85 PathProgramCache]: Analyzing trace with hash -156694993, now seen corresponding path program 1 times [2023-03-31 21:19:28,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670362723] [2023-03-31 21:19:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:29,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:29,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670362723] [2023-03-31 21:19:29,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670362723] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:29,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:29,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:29,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84008675] [2023-03-31 21:19:29,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:29,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:29,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:29,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:29,298 INFO L87 Difference]: Start difference. First operand 607 states and 1104 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 21:19:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:29,704 INFO L93 Difference]: Finished difference Result 1841 states and 3417 transitions. [2023-03-31 21:19:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:19:29,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-03-31 21:19:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:29,711 INFO L225 Difference]: With dead ends: 1841 [2023-03-31 21:19:29,712 INFO L226 Difference]: Without dead ends: 1239 [2023-03-31 21:19:29,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:19:29,714 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:29,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:19:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-03-31 21:19:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1217. [2023-03-31 21:19:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1180 states have (on average 1.8135593220338984) internal successors, (2140), 1197 states have internal predecessors, (2140), 10 states have call successors, (10), 10 states have call predecessors, (10), 26 states have return successors, (90), 9 states have call predecessors, (90), 9 states have call successors, (90) [2023-03-31 21:19:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 2240 transitions. [2023-03-31 21:19:29,758 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 2240 transitions. Word has length 158 [2023-03-31 21:19:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:29,758 INFO L495 AbstractCegarLoop]: Abstraction has 1217 states and 2240 transitions. [2023-03-31 21:19:29,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 21:19:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 2240 transitions. [2023-03-31 21:19:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-03-31 21:19:29,796 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:29,796 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:19:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:19:29,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:29,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 271473639, now seen corresponding path program 1 times [2023-03-31 21:19:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:29,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159494330] [2023-03-31 21:19:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:30,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:30,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159494330] [2023-03-31 21:19:30,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159494330] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:30,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:30,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:30,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099916505] [2023-03-31 21:19:30,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:30,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:30,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:30,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:30,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:30,160 INFO L87 Difference]: Start difference. First operand 1217 states and 2240 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 21:19:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:30,995 INFO L93 Difference]: Finished difference Result 3779 states and 7230 transitions. [2023-03-31 21:19:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:19:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 162 [2023-03-31 21:19:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:31,011 INFO L225 Difference]: With dead ends: 3779 [2023-03-31 21:19:31,011 INFO L226 Difference]: Without dead ends: 2567 [2023-03-31 21:19:31,014 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 21:19:31,015 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 556 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:31,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 46 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:19:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2023-03-31 21:19:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2501. [2023-03-31 21:19:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2394 states have (on average 1.6683375104427736) internal successors, (3994), 2465 states have internal predecessors, (3994), 18 states have call successors, (18), 18 states have call predecessors, (18), 88 states have return successors, (335), 17 states have call predecessors, (335), 17 states have call successors, (335) [2023-03-31 21:19:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4347 transitions. [2023-03-31 21:19:31,147 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4347 transitions. Word has length 162 [2023-03-31 21:19:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:31,147 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 4347 transitions. [2023-03-31 21:19:31,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 21:19:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4347 transitions. [2023-03-31 21:19:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-03-31 21:19:31,155 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:31,155 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:19:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:19:31,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:31,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1622273925, now seen corresponding path program 1 times [2023-03-31 21:19:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:31,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264166612] [2023-03-31 21:19:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:31,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264166612] [2023-03-31 21:19:31,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264166612] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:31,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:31,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:31,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709751061] [2023-03-31 21:19:31,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:31,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:31,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:31,510 INFO L87 Difference]: Start difference. First operand 2501 states and 4347 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 21:19:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:32,394 INFO L93 Difference]: Finished difference Result 7659 states and 14066 transitions. [2023-03-31 21:19:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:19:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 168 [2023-03-31 21:19:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:32,423 INFO L225 Difference]: With dead ends: 7659 [2023-03-31 21:19:32,424 INFO L226 Difference]: Without dead ends: 5163 [2023-03-31 21:19:32,430 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 21:19:32,437 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 483 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:32,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 44 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:19:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2023-03-31 21:19:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 5043. [2023-03-31 21:19:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5043 states, 4809 states have (on average 1.4225410688292783) internal successors, (6841), 4975 states have internal predecessors, (6841), 34 states have call successors, (34), 34 states have call predecessors, (34), 199 states have return successors, (823), 33 states have call predecessors, (823), 33 states have call successors, (823) [2023-03-31 21:19:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 7698 transitions. [2023-03-31 21:19:32,627 INFO L78 Accepts]: Start accepts. Automaton has 5043 states and 7698 transitions. Word has length 168 [2023-03-31 21:19:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:32,628 INFO L495 AbstractCegarLoop]: Abstraction has 5043 states and 7698 transitions. [2023-03-31 21:19:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 21:19:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5043 states and 7698 transitions. [2023-03-31 21:19:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-31 21:19:32,639 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:32,639 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:19:32,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:19:32,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:32,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2038814889, now seen corresponding path program 1 times [2023-03-31 21:19:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692455843] [2023-03-31 21:19:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:34,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692455843] [2023-03-31 21:19:34,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692455843] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:19:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970827794] [2023-03-31 21:19:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:34,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:19:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:34,237 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 21:19:34,264 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 21:19:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:34,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:19:34,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:19:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:34,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:19:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970827794] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:34,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:19:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-31 21:19:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765371807] [2023-03-31 21:19:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:19:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:19:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:19:34,730 INFO L87 Difference]: Start difference. First operand 5043 states and 7698 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 21:19:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:35,386 INFO L93 Difference]: Finished difference Result 12549 states and 19708 transitions. [2023-03-31 21:19:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:19:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 170 [2023-03-31 21:19:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:35,427 INFO L225 Difference]: With dead ends: 12549 [2023-03-31 21:19:35,427 INFO L226 Difference]: Without dead ends: 7511 [2023-03-31 21:19:35,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:19:35,444 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:35,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:19:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7511 states. [2023-03-31 21:19:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7511 to 7507. [2023-03-31 21:19:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7507 states, 7185 states have (on average 1.4161447459986083) internal successors, (10175), 7407 states have internal predecessors, (10175), 50 states have call successors, (50), 50 states have call predecessors, (50), 271 states have return successors, (1532), 49 states have call predecessors, (1532), 49 states have call successors, (1532) [2023-03-31 21:19:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7507 states to 7507 states and 11757 transitions. [2023-03-31 21:19:35,678 INFO L78 Accepts]: Start accepts. Automaton has 7507 states and 11757 transitions. Word has length 170 [2023-03-31 21:19:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:35,679 INFO L495 AbstractCegarLoop]: Abstraction has 7507 states and 11757 transitions. [2023-03-31 21:19:35,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 21:19:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7507 states and 11757 transitions. [2023-03-31 21:19:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-03-31 21:19:35,702 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:35,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:19:35,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 21:19:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:19:35,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:35,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash -603055965, now seen corresponding path program 1 times [2023-03-31 21:19:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:35,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93152727] [2023-03-31 21:19:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:19:36,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:36,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93152727] [2023-03-31 21:19:36,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93152727] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:19:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616847996] [2023-03-31 21:19:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:19:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:36,381 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 21:19:36,391 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 21:19:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:36,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:19:36,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:19:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:36,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:19:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:36,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616847996] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:19:36,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785750621] [2023-03-31 21:19:36,823 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:19:36,823 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:19:36,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:19:36,830 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:19:36,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:19:37,561 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:19:40,322 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 147 for LOIs