/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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:10:33,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:10:33,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:10:33,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:10:33,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:10:33,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:10:33,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:10:33,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:10:33,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:10:33,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:10:33,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:10:33,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:10:33,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:10:33,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:10:33,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:10:33,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:10:33,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:10:33,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:10:33,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:10:33,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:10:33,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:10:33,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:10:33,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:10:33,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:10:33,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:10:33,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:10:33,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:10:33,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:10:33,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:10:33,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:10:33,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:10:33,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:10:33,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:10:33,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:10:33,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:10:33,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:10:33,857 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 22:10:33,881 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:10:33,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:10:33,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:10:33,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:10:33,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:10:33,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:10:33,883 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:10:33,883 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:10:33,883 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:10:33,883 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:10:33,883 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:10:33,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:10:33,884 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:10:33,884 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:10:33,884 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:10:33,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:10:33,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:10:33,884 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:10:33,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:10:33,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:10:33,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:10:33,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:10:33,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:10:33,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:10:33,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:10:33,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:10:33,890 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:10:33,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:10:33,890 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:10:33,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:10:33,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:10:33,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:10:33,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:33,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:10:33,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:10:33,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:10:33,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:10:33,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:10:33,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:10:33,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:10:33,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:10:33,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:10:34,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:10:34,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:10:34,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:10:34,160 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:10:34,161 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:10:34,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label01.c [2023-03-31 22:10:35,345 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:10:35,691 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:10:35,692 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label01.c [2023-03-31 22:10:35,711 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5945b50e/6c404901eea74c258bd7504931c2d9a7/FLAGcc0af7825 [2023-03-31 22:10:35,729 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5945b50e/6c404901eea74c258bd7504931c2d9a7 [2023-03-31 22:10:35,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:10:35,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:10:35,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:35,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:10:35,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:10:35,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:35" (1/1) ... [2023-03-31 22:10:35,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f879df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:35, skipping insertion in model container [2023-03-31 22:10:35,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:35" (1/1) ... [2023-03-31 22:10:35,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:10:35,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:10:36,025 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_label01.c[5470,5483] [2023-03-31 22:10:36,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:36,456 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:10:36,487 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_label01.c[5470,5483] [2023-03-31 22:10:36,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:36,683 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:10:36,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36 WrapperNode [2023-03-31 22:10:36,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:36,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:10:36,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:10:36,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:10:36,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:10:36,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:10:36,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:10:36,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:10:36,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (1/1) ... [2023-03-31 22:10:36,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:36,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:36,886 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 22:10:36,908 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 22:10:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:10:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:10:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:10:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:10:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:10:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:10:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:10:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:10:37,008 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:10:37,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:10:39,328 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:10:40,003 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:10:40,003 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:10:40,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:40 BoogieIcfgContainer [2023-03-31 22:10:40,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:10:40,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:10:40,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:10:40,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:10:40,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:10:35" (1/3) ... [2023-03-31 22:10:40,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46cfdd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:40, skipping insertion in model container [2023-03-31 22:10:40,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:36" (2/3) ... [2023-03-31 22:10:40,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46cfdd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:40, skipping insertion in model container [2023-03-31 22:10:40,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:40" (3/3) ... [2023-03-31 22:10:40,019 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label01.c [2023-03-31 22:10:40,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:10:40,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:10:40,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:10:40,094 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;@6b599f71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:10:40,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:10:40,100 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 22:10:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:10:40,106 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:40,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:10:40,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:40,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash 271519427, now seen corresponding path program 1 times [2023-03-31 22:10:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569435043] [2023-03-31 22:10:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:40,552 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 22:10:40,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569435043] [2023-03-31 22:10:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569435043] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:40,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:40,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494055955] [2023-03-31 22:10:40,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:40,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:40,583 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 22:10:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:42,237 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:10:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:42,241 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 22:10:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:42,254 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:10:42,254 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:10:42,260 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 22:10:42,263 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, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:10:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:10:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:10:42,321 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 22:10:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-03-31 22:10:42,327 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-03-31 22:10:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:42,327 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-03-31 22:10:42,327 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 22:10:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-03-31 22:10:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:10:42,329 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:42,329 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 22:10:42,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:10:42,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:42,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash -272698411, now seen corresponding path program 1 times [2023-03-31 22:10:42,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:42,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465606288] [2023-03-31 22:10:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:42,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:42,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:42,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465606288] [2023-03-31 22:10:42,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465606288] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:42,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94571388] [2023-03-31 22:10:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:42,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:10:42,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:42,701 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 22:10:42,709 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 22:10:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:42,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:10:42,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:10:42,923 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 22:10:42,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:10:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94571388] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:42,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:10:42,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-03-31 22:10:42,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259546770] [2023-03-31 22:10:42,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:42,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:10:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:42,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:10:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:10:42,926 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 22:10:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:45,007 INFO L93 Difference]: Finished difference Result 1171 states and 1783 transitions. [2023-03-31 22:10:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:10:45,013 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 22:10:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:45,019 INFO L225 Difference]: With dead ends: 1171 [2023-03-31 22:10:45,019 INFO L226 Difference]: Without dead ends: 707 [2023-03-31 22:10:45,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:10:45,022 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 683 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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 22:10:45,023 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 22:10:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-03-31 22:10:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 700. [2023-03-31 22:10:45,074 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 22:10:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1009 transitions. [2023-03-31 22:10:45,076 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1009 transitions. Word has length 21 [2023-03-31 22:10:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:45,077 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1009 transitions. [2023-03-31 22:10:45,077 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 22:10:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1009 transitions. [2023-03-31 22:10:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:10:45,078 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:45,078 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 22:10:45,085 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 22:10:45,282 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 22:10:45,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:45,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash 656394014, now seen corresponding path program 1 times [2023-03-31 22:10:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:45,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957272641] [2023-03-31 22:10:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:45,402 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 22:10:45,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957272641] [2023-03-31 22:10:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957272641] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:45,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:45,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:10:45,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817084418] [2023-03-31 22:10:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:45,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:10:45,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:45,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:10:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:10:45,404 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 22:10:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:48,023 INFO L93 Difference]: Finished difference Result 1662 states and 2557 transitions. [2023-03-31 22:10:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:10:48,023 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 22:10:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:48,029 INFO L225 Difference]: With dead ends: 1662 [2023-03-31 22:10:48,029 INFO L226 Difference]: Without dead ends: 1192 [2023-03-31 22:10:48,030 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 22:10:48,031 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:48,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 49 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 22:10:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2023-03-31 22:10:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 943. [2023-03-31 22:10:48,058 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 22:10:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1295 transitions. [2023-03-31 22:10:48,061 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1295 transitions. Word has length 26 [2023-03-31 22:10:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:48,062 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1295 transitions. [2023-03-31 22:10:48,062 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 22:10:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1295 transitions. [2023-03-31 22:10:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 22:10:48,063 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:48,064 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 22:10:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:10:48,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:48,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1890375341, now seen corresponding path program 1 times [2023-03-31 22:10:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560837618] [2023-03-31 22:10:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:48,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560837618] [2023-03-31 22:10:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560837618] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:48,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101990007] [2023-03-31 22:10:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:48,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:10:48,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:48,393 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 22:10:48,396 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 22:10:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:48,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 22:10:48,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:10:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:48,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:10:48,765 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 22:10:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101990007] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:48,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:10:48,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2023-03-31 22:10:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657790609] [2023-03-31 22:10:48,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:48,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 22:10:48,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 22:10:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:10:48,767 INFO L87 Difference]: Start difference. First operand 943 states and 1295 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 22:10:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:52,316 INFO L93 Difference]: Finished difference Result 3295 states and 4774 transitions. [2023-03-31 22:10:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:10:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 47 [2023-03-31 22:10:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:52,326 INFO L225 Difference]: With dead ends: 3295 [2023-03-31 22:10:52,326 INFO L226 Difference]: Without dead ends: 2357 [2023-03-31 22:10:52,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-03-31 22:10:52,329 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1068 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:52,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1068 Valid, 37 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:10:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2023-03-31 22:10:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2129. [2023-03-31 22:10:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2080 states have (on average 1.3918269230769231) internal successors, (2895), 2101 states have internal predecessors, (2895), 14 states have call successors, (14), 14 states have call predecessors, (14), 34 states have return successors, (144), 13 states have call predecessors, (144), 13 states have call successors, (144) [2023-03-31 22:10:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 3053 transitions. [2023-03-31 22:10:52,384 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 3053 transitions. Word has length 47 [2023-03-31 22:10:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:52,384 INFO L495 AbstractCegarLoop]: Abstraction has 2129 states and 3053 transitions. [2023-03-31 22:10:52,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 22:10:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 3053 transitions. [2023-03-31 22:10:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:10:52,386 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:52,386 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 22:10:52,397 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 22:10:52,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 22:10:52,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:52,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -327410286, now seen corresponding path program 1 times [2023-03-31 22:10:52,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:52,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545464059] [2023-03-31 22:10:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:52,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:52,865 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 22:10:52,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:52,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545464059] [2023-03-31 22:10:52,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545464059] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:52,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963197833] [2023-03-31 22:10:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:52,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:10:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:52,871 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 22:10:52,874 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 22:10:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:52,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:10:52,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:10:53,068 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 22:10:53,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:10:53,264 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 22:10:53,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963197833] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:53,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:10:53,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-03-31 22:10:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189578433] [2023-03-31 22:10:53,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:53,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:10:53,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:10:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:10:53,266 INFO L87 Difference]: Start difference. First operand 2129 states and 3053 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 22:10:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:55,015 INFO L93 Difference]: Finished difference Result 5558 states and 8291 transitions. [2023-03-31 22:10:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:10:55,017 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 22:10:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:55,031 INFO L225 Difference]: With dead ends: 5558 [2023-03-31 22:10:55,032 INFO L226 Difference]: Without dead ends: 3434 [2023-03-31 22:10:55,037 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 22:10:55,038 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 511 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:55,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 43 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:10:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2023-03-31 22:10:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3227. [2023-03-31 22:10:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3137 states have (on average 1.3076187440229519) internal successors, (4102), 3185 states have internal predecessors, (4102), 21 states have call successors, (21), 21 states have call predecessors, (21), 68 states have return successors, (273), 20 states have call predecessors, (273), 20 states have call successors, (273) [2023-03-31 22:10:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4396 transitions. [2023-03-31 22:10:55,123 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4396 transitions. Word has length 60 [2023-03-31 22:10:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:55,125 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 4396 transitions. [2023-03-31 22:10:55,125 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 22:10:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4396 transitions. [2023-03-31 22:10:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 22:10:55,137 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:55,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:55,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:10:55,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:10:55,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:55,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:55,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1833758318, now seen corresponding path program 1 times [2023-03-31 22:10:55,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:55,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47647854] [2023-03-31 22:10:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:55,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:10:55,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:55,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47647854] [2023-03-31 22:10:55,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47647854] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:10:55,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:10:55,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:10:55,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149004644] [2023-03-31 22:10:55,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:10:55,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:10:55,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:10:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:10:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:10:55,687 INFO L87 Difference]: Start difference. First operand 3227 states and 4396 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:10:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:10:56,935 INFO L93 Difference]: Finished difference Result 8370 states and 11835 transitions. [2023-03-31 22:10:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:10:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-03-31 22:10:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:10:56,959 INFO L225 Difference]: With dead ends: 8370 [2023-03-31 22:10:56,959 INFO L226 Difference]: Without dead ends: 5148 [2023-03-31 22:10:56,968 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 22:10:56,969 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:10:56,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:10:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5148 states. [2023-03-31 22:10:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5148 to 4102. [2023-03-31 22:10:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4102 states, 3988 states have (on average 1.2670511534603812) internal successors, (5053), 4048 states have internal predecessors, (5053), 27 states have call successors, (27), 27 states have call predecessors, (27), 86 states have return successors, (406), 26 states have call predecessors, (406), 26 states have call successors, (406) [2023-03-31 22:10:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 5486 transitions. [2023-03-31 22:10:57,139 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 5486 transitions. Word has length 173 [2023-03-31 22:10:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:10:57,142 INFO L495 AbstractCegarLoop]: Abstraction has 4102 states and 5486 transitions. [2023-03-31 22:10:57,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:10:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 5486 transitions. [2023-03-31 22:10:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-31 22:10:57,144 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:10:57,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:57,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:10:57,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:10:57,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:10:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1602878250, now seen corresponding path program 1 times [2023-03-31 22:10:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:10:57,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547707992] [2023-03-31 22:10:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:10:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:57,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:10:57,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547707992] [2023-03-31 22:10:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547707992] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:10:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338655249] [2023-03-31 22:10:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:10:57,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:10:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:57,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:10:57,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:10:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:10:57,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:10:57,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:10:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:57,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:10:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:10:57,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338655249] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:10:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214311953] [2023-03-31 22:10:57,835 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:10:57,837 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:10:57,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:10:57,849 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:10:57,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:10:57,974 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:10:58,355 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-03-31 22:10:58,706 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8003 conjuctions. This might take some time... [2023-03-31 22:10:58,820 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 110 conjuctions. [2023-03-31 22:10:58,867 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-03-31 22:10:58,972 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8297 conjuctions. This might take some time... [2023-03-31 22:10:59,215 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 194 conjuctions. [2023-03-31 22:11:00,387 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:11:00,496 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-03-31 22:11:00,886 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8000 conjuctions. This might take some time... [2023-03-31 22:11:01,086 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 110 conjuctions. [2023-03-31 22:11:13,621 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23