/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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:21:02,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:21:02,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:21:02,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:21:02,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:21:02,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:21:02,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:21:02,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:21:02,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:21:02,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:21:02,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:21:02,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-03-31 21:21:02,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:21:02,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:21:02,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:21:02,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:21:02,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:21:02,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:21:02,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:21:02,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:21:02,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:21:02,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:21:02,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:21:02,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:21:02,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:21:02,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:21:02,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:21:02,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:21:02,967 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 21:21:02,996 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:21:02,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:21:02,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:21:02,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:21:02,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:21:02,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:21:02,997 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:21:02,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:21:02,997 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:21:02,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:21:02,998 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:21:02,998 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:21:02,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:21:02,999 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:21:02,999 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:21:02,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:21:02,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:21:02,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:21:02,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:21:02,999 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:21:03,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:21:03,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:21:03,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:21:03,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:21:03,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:21:03,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:21:03,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:21:03,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:21:03,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:21:03,200 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:21:03,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2023-03-31 21:21:04,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:21:04,500 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:21:04,500 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2023-03-31 21:21:04,515 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/707779f56/abddfe3c3fa3471cb5fa055597bfaad7/FLAGa724456c6 [2023-03-31 21:21:04,527 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/707779f56/abddfe3c3fa3471cb5fa055597bfaad7 [2023-03-31 21:21:04,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:21:04,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:21:04,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:21:04,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:21:04,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:21:04,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:21:04" (1/1) ... [2023-03-31 21:21:04,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789907b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:04, skipping insertion in model container [2023-03-31 21:21:04,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:21:04" (1/1) ... [2023-03-31 21:21:04,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:21:04,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:21:04,956 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_label41.c[58800,58813] [2023-03-31 21:21:04,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:21:04,985 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:21:05,118 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_label41.c[58800,58813] [2023-03-31 21:21:05,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:21:05,140 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:21:05,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05 WrapperNode [2023-03-31 21:21:05,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:21:05,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:21:05,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:21:05,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:21:05,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,254 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:21:05,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:21:05,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:21:05,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:21:05,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:21:05,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:05,319 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 21:21:05,322 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 21:21:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:21:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:21:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:21:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:21:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:21:05,411 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:21:05,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:21:06,643 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:21:06,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:21:06,886 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:21:06,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:21:06 BoogieIcfgContainer [2023-03-31 21:21:06,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:21:06,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:21:06,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:21:06,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:21:06,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:21:04" (1/3) ... [2023-03-31 21:21:06,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c807a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:21:06, skipping insertion in model container [2023-03-31 21:21:06,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (2/3) ... [2023-03-31 21:21:06,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c807a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:21:06, skipping insertion in model container [2023-03-31 21:21:06,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:21:06" (3/3) ... [2023-03-31 21:21:06,893 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label41.c [2023-03-31 21:21:06,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:21:06,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:21:06,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:21:06,944 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;@6e480f82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:21:06,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:21:06,948 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 21:21:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:21:06,957 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:06,957 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 21:21:06,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:06,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash 597539318, now seen corresponding path program 1 times [2023-03-31 21:21:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:06,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912684967] [2023-03-31 21:21:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:07,889 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 21:21:07,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:07,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912684967] [2023-03-31 21:21:07,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912684967] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:07,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:07,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:21:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351822701] [2023-03-31 21:21:07,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:07,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:21:07,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:07,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:21:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:21:07,928 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 21:21:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:08,599 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:21:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:21:08,601 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 21:21:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:08,610 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:21:08,610 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:21:08,612 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 21:21:08,615 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 21:21:08,615 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 21:21:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:21:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:21:08,696 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 21:21:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-03-31 21:21:08,699 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-03-31 21:21:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:08,700 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-03-31 21:21:08,700 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 21:21:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-03-31 21:21:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-03-31 21:21:08,703 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:08,704 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 21:21:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:21:08,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:08,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash 316769871, now seen corresponding path program 1 times [2023-03-31 21:21:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574779211] [2023-03-31 21:21:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:09,184 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 21:21:09,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:09,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574779211] [2023-03-31 21:21:09,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574779211] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:09,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:09,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:21:09,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439507431] [2023-03-31 21:21:09,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:09,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:09,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:09,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:21:09,189 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 21:21:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:09,893 INFO L93 Difference]: Finished difference Result 919 states and 1752 transitions. [2023-03-31 21:21:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:21:09,893 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 21:21:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:09,899 INFO L225 Difference]: With dead ends: 919 [2023-03-31 21:21:09,899 INFO L226 Difference]: Without dead ends: 623 [2023-03-31 21:21:09,901 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 21:21:09,902 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 531 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:09,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 46 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:21:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-03-31 21:21:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 603. [2023-03-31 21:21:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.7393526405451447) internal successors, (1021), 591 states have internal predecessors, (1021), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-31 21:21:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1048 transitions. [2023-03-31 21:21:09,933 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1048 transitions. Word has length 157 [2023-03-31 21:21:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:09,933 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1048 transitions. [2023-03-31 21:21:09,934 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 21:21:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1048 transitions. [2023-03-31 21:21:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:21:09,937 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:09,937 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-03-31 21:21:09,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:21:09,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:09,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash -848543275, now seen corresponding path program 1 times [2023-03-31 21:21:09,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:09,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266541007] [2023-03-31 21:21:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:09,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:10,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:10,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266541007] [2023-03-31 21:21:10,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266541007] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:10,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:10,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:21:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870397772] [2023-03-31 21:21:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:21:10,259 INFO L87 Difference]: Start difference. First operand 603 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 21:21:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:10,927 INFO L93 Difference]: Finished difference Result 1857 states and 3314 transitions. [2023-03-31 21:21:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:21:10,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-03-31 21:21:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:10,934 INFO L225 Difference]: With dead ends: 1857 [2023-03-31 21:21:10,934 INFO L226 Difference]: Without dead ends: 1259 [2023-03-31 21:21:10,936 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 21:21:10,937 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 492 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:10,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 48 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:21:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2023-03-31 21:21:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1233. [2023-03-31 21:21:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1188 states have (on average 1.6885521885521886) internal successors, (2006), 1213 states have internal predecessors, (2006), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (106), 9 states have call predecessors, (106), 9 states have call successors, (106) [2023-03-31 21:21:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2122 transitions. [2023-03-31 21:21:11,025 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2122 transitions. Word has length 161 [2023-03-31 21:21:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:11,026 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2122 transitions. [2023-03-31 21:21:11,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 21:21:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2122 transitions. [2023-03-31 21:21:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 21:21:11,031 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:11,031 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:21:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:21:11,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:11,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash -747238113, now seen corresponding path program 1 times [2023-03-31 21:21:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336160258] [2023-03-31 21:21:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:11,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:11,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336160258] [2023-03-31 21:21:11,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336160258] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:11,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:21:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281190186] [2023-03-31 21:21:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:11,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:21:11,363 INFO L87 Difference]: Start difference. First operand 1233 states and 2122 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 21:21:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:12,059 INFO L93 Difference]: Finished difference Result 3835 states and 7018 transitions. [2023-03-31 21:21:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:21:12,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 171 [2023-03-31 21:21:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:12,075 INFO L225 Difference]: With dead ends: 3835 [2023-03-31 21:21:12,075 INFO L226 Difference]: Without dead ends: 2607 [2023-03-31 21:21:12,078 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 21:21:12,082 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 526 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:12,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 43 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:21:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2023-03-31 21:21:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2537. [2023-03-31 21:21:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2412 states have (on average 1.576285240464345) internal successors, (3802), 2501 states have internal predecessors, (3802), 18 states have call successors, (18), 18 states have call predecessors, (18), 106 states have return successors, (425), 17 states have call predecessors, (425), 17 states have call successors, (425) [2023-03-31 21:21:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 4245 transitions. [2023-03-31 21:21:12,158 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 4245 transitions. Word has length 171 [2023-03-31 21:21:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:12,158 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 4245 transitions. [2023-03-31 21:21:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 21:21:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 4245 transitions. [2023-03-31 21:21:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-31 21:21:12,163 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:12,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-03-31 21:21:12,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:21:12,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:12,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -215736178, now seen corresponding path program 1 times [2023-03-31 21:21:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:12,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225276723] [2023-03-31 21:21:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:21:12,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:12,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225276723] [2023-03-31 21:21:12,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225276723] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:12,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988604797] [2023-03-31 21:21:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:12,600 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 21:21:12,626 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 21:21:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:12,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:21:12,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:21:12,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:21:12,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988604797] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:12,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:21:12,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:21:12,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921380758] [2023-03-31 21:21:12,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:12,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:12,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:12,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:12,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:21:12,980 INFO L87 Difference]: Start difference. First operand 2537 states and 4245 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 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 21:21:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:13,326 INFO L93 Difference]: Finished difference Result 7711 states and 13617 transitions. [2023-03-31 21:21:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:21:13,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 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 179 [2023-03-31 21:21:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:13,349 INFO L225 Difference]: With dead ends: 7711 [2023-03-31 21:21:13,349 INFO L226 Difference]: Without dead ends: 5179 [2023-03-31 21:21:13,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:21:13,356 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 759 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:13,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 563 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:21:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2023-03-31 21:21:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5103. [2023-03-31 21:21:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 4839 states have (on average 1.5728456292622444) internal successors, (7611), 5035 states have internal predecessors, (7611), 34 states have call successors, (34), 34 states have call predecessors, (34), 229 states have return successors, (1071), 33 states have call predecessors, (1071), 33 states have call successors, (1071) [2023-03-31 21:21:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 8716 transitions. [2023-03-31 21:21:13,538 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 8716 transitions. Word has length 179 [2023-03-31 21:21:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:13,538 INFO L495 AbstractCegarLoop]: Abstraction has 5103 states and 8716 transitions. [2023-03-31 21:21:13,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 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 21:21:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 8716 transitions. [2023-03-31 21:21:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 21:21:13,550 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:13,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:21:13,574 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 21:21:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:13,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:13,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1395154006, now seen corresponding path program 1 times [2023-03-31 21:21:13,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:13,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098371101] [2023-03-31 21:21:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:14,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:14,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098371101] [2023-03-31 21:21:14,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098371101] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:14,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567672708] [2023-03-31 21:21:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:14,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:14,091 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 21:21:14,092 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 21:21:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:14,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:21:14,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:14,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:21:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:14,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567672708] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:21:14,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174598401] [2023-03-31 21:21:14,455 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:21:14,456 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:21:14,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:21:14,463 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:21:14,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:21:14,995 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:21:16,885 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 148 for LOIs