/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/psyco/psyco_cev_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:45:53,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:45:53,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:45:53,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:45:53,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:45:53,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:45:53,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:45:53,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:45:53,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:45:53,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:45:53,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:45:53,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-02 20:45:53,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:45:53,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:45:53,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:45:53,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 20:45:53,154 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:45:53,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:45:53,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:45:53,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:45:53,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:45:53,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:45:53,156 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:45:53,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:45:53,156 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:45:53,156 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:45:53,157 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:45:53,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:45:53,157 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:45:53,157 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:45:53,158 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:45:53,158 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:45:53,158 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:45:53,158 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:45:53,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:45:53,158 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:45:53,159 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:45:53,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:45:53,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:45:53,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:45:53,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:45:53,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:45:53,160 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:45:53,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:45:53,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:45:53,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:45:53,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:45:53,376 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:45:53,376 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:45:53,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_cev_1.c [2023-04-02 20:45:54,533 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:45:59,771 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:45:59,772 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_cev_1.c [2023-04-02 20:46:00,378 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad976d7f/7fa773a9744247c29a2e08f2efb1b035/FLAGddbb7f586 [2023-04-02 20:46:00,391 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad976d7f/7fa773a9744247c29a2e08f2efb1b035 [2023-04-02 20:46:00,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:46:00,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:46:00,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:46:00,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:46:00,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:46:00,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:46:00" (1/1) ... [2023-04-02 20:46:00,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f312617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:46:00, skipping insertion in model container [2023-04-02 20:46:00,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:46:00" (1/1) ... [2023-04-02 20:46:00,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:46:03,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:46:49,580 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/psyco/psyco_cev_1.c[48648179,48648192] [2023-04-02 20:46:49,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:46:49,955 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:47:29,386 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/psyco/psyco_cev_1.c[48648179,48648192] [2023-04-02 20:47:29,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:47:29,853 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:47:29,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29 WrapperNode [2023-04-02 20:47:29,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:47:29,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:47:29,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:47:29,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:47:29,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:29,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:38,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:38,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:49,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:49,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:50,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:50,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:56,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:47:56,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:47:56,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:47:56,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:47:56,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (1/1) ... [2023-04-02 20:47:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:47:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:47:56,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 20:47:56,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 20:47:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:47:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:47:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:47:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:47:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:47:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:47:56,847 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:47:56,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:48:21,868 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:48:21,988 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:48:21,988 INFO L302 CfgBuilder]: Removed 122 assume(true) statements. [2023-04-02 20:48:21,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:48:21 BoogieIcfgContainer [2023-04-02 20:48:21,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:48:21,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:48:21,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:48:22,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:48:22,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:46:00" (1/3) ... [2023-04-02 20:48:22,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc0bacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:48:22, skipping insertion in model container [2023-04-02 20:48:22,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:47:29" (2/3) ... [2023-04-02 20:48:22,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc0bacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:48:22, skipping insertion in model container [2023-04-02 20:48:22,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:48:21" (3/3) ... [2023-04-02 20:48:22,003 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_cev_1.c [2023-04-02 20:48:22,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:48:22,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:48:22,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:48:22,310 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;@4a09e3a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:48:22,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:48:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 5011 states, 5005 states have (on average 1.999000999000999) internal successors, (10005), 5006 states have internal predecessors, (10005), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 20:48:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 20:48:22,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:22,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:22,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:22,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1535076227, now seen corresponding path program 1 times [2023-04-02 20:48:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:22,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481979422] [2023-04-02 20:48:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:48:22,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481979422] [2023-04-02 20:48:22,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481979422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:22,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:22,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 20:48:22,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685250754] [2023-04-02 20:48:22,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:22,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 20:48:22,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 20:48:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 20:48:22,755 INFO L87 Difference]: Start difference. First operand has 5011 states, 5005 states have (on average 1.999000999000999) internal successors, (10005), 5006 states have internal predecessors, (10005), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:23,020 INFO L93 Difference]: Finished difference Result 8481 states and 16941 transitions. [2023-04-02 20:48:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 20:48:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 20:48:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:23,060 INFO L225 Difference]: With dead ends: 8481 [2023-04-02 20:48:23,060 INFO L226 Difference]: Without dead ends: 3442 [2023-04-02 20:48:23,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 20:48:23,080 INFO L413 NwaCegarLoop]: 5177 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:23,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5177 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 20:48:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2023-04-02 20:48:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3442. [2023-04-02 20:48:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3438 states have (on average 1.486910994764398) internal successors, (5112), 3438 states have internal predecessors, (5112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 5115 transitions. [2023-04-02 20:48:23,314 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 5115 transitions. Word has length 12 [2023-04-02 20:48:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:23,322 INFO L495 AbstractCegarLoop]: Abstraction has 3442 states and 5115 transitions. [2023-04-02 20:48:23,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 5115 transitions. [2023-04-02 20:48:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 20:48:23,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:23,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:48:23,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:23,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash 874426792, now seen corresponding path program 1 times [2023-04-02 20:48:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:23,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69075588] [2023-04-02 20:48:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:48:23,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:23,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69075588] [2023-04-02 20:48:23,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69075588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:23,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262757178] [2023-04-02 20:48:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:23,444 INFO L87 Difference]: Start difference. First operand 3442 states and 5115 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:23,808 INFO L93 Difference]: Finished difference Result 6882 states and 10229 transitions. [2023-04-02 20:48:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 20:48:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:23,821 INFO L225 Difference]: With dead ends: 6882 [2023-04-02 20:48:23,821 INFO L226 Difference]: Without dead ends: 3445 [2023-04-02 20:48:23,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:23,844 INFO L413 NwaCegarLoop]: 5113 mSDtfsCounter, 4 mSDsluCounter, 4998 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10111 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:23,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10111 Invalid, 115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 20:48:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2023-04-02 20:48:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 3445. [2023-04-02 20:48:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3441 states have (on average 1.4864864864864864) internal successors, (5115), 3441 states have internal predecessors, (5115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 5118 transitions. [2023-04-02 20:48:23,909 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 5118 transitions. Word has length 13 [2023-04-02 20:48:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:23,912 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 5118 transitions. [2023-04-02 20:48:23,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 5118 transitions. [2023-04-02 20:48:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 20:48:23,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:23,918 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:48:23,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:23,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash 651068230, now seen corresponding path program 1 times [2023-04-02 20:48:23,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:23,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232381288] [2023-04-02 20:48:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:48:24,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:24,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232381288] [2023-04-02 20:48:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232381288] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:24,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:24,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:24,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043250283] [2023-04-02 20:48:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:24,034 INFO L87 Difference]: Start difference. First operand 3445 states and 5118 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:24,305 INFO L93 Difference]: Finished difference Result 6890 states and 10238 transitions. [2023-04-02 20:48:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 20:48:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:24,319 INFO L225 Difference]: With dead ends: 6890 [2023-04-02 20:48:24,319 INFO L226 Difference]: Without dead ends: 3451 [2023-04-02 20:48:24,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:24,330 INFO L413 NwaCegarLoop]: 5112 mSDtfsCounter, 832 mSDsluCounter, 4172 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 9284 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:24,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 9284 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 20:48:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2023-04-02 20:48:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3449. [2023-04-02 20:48:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3445 states have (on average 1.485921625544267) internal successors, (5119), 3445 states have internal predecessors, (5119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 5122 transitions. [2023-04-02 20:48:24,457 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 5122 transitions. Word has length 18 [2023-04-02 20:48:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:24,457 INFO L495 AbstractCegarLoop]: Abstraction has 3449 states and 5122 transitions. [2023-04-02 20:48:24,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 5122 transitions. [2023-04-02 20:48:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 20:48:24,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:24,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:24,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:48:24,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:24,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash -596188714, now seen corresponding path program 1 times [2023-04-02 20:48:24,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:24,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81357472] [2023-04-02 20:48:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:24,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81357472] [2023-04-02 20:48:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81357472] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:24,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:24,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558184353] [2023-04-02 20:48:24,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:24,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:24,556 INFO L87 Difference]: Start difference. First operand 3449 states and 5122 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:25,106 INFO L93 Difference]: Finished difference Result 10329 states and 15348 transitions. [2023-04-02 20:48:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:25,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 20:48:25,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:25,149 INFO L225 Difference]: With dead ends: 10329 [2023-04-02 20:48:25,149 INFO L226 Difference]: Without dead ends: 6874 [2023-04-02 20:48:25,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:25,162 INFO L413 NwaCegarLoop]: 5023 mSDtfsCounter, 4990 mSDsluCounter, 4992 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4990 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:25,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4990 Valid, 10015 Invalid, 309 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 20:48:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2023-04-02 20:48:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 6824. [2023-04-02 20:48:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6824 states, 6820 states have (on average 1.4879765395894429) internal successors, (10148), 6820 states have internal predecessors, (10148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6824 states to 6824 states and 10151 transitions. [2023-04-02 20:48:25,369 INFO L78 Accepts]: Start accepts. Automaton has 6824 states and 10151 transitions. Word has length 21 [2023-04-02 20:48:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:25,369 INFO L495 AbstractCegarLoop]: Abstraction has 6824 states and 10151 transitions. [2023-04-02 20:48:25,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6824 states and 10151 transitions. [2023-04-02 20:48:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 20:48:25,373 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:25,373 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:25,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:48:25,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:25,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -75724478, now seen corresponding path program 1 times [2023-04-02 20:48:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:25,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829885097] [2023-04-02 20:48:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:25,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:25,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829885097] [2023-04-02 20:48:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829885097] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:25,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706820772] [2023-04-02 20:48:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:25,473 INFO L87 Difference]: Start difference. First operand 6824 states and 10151 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:25,749 INFO L93 Difference]: Finished difference Result 13654 states and 20315 transitions. [2023-04-02 20:48:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 20:48:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:25,811 INFO L225 Difference]: With dead ends: 13654 [2023-04-02 20:48:25,811 INFO L226 Difference]: Without dead ends: 6836 [2023-04-02 20:48:25,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:25,827 INFO L413 NwaCegarLoop]: 5114 mSDtfsCounter, 833 mSDsluCounter, 4172 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 9286 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:25,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 9286 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 20:48:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2023-04-02 20:48:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6834. [2023-04-02 20:48:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6834 states, 6830 states have (on average 1.4872620790629576) internal successors, (10158), 6830 states have internal predecessors, (10158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 10161 transitions. [2023-04-02 20:48:26,007 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 10161 transitions. Word has length 27 [2023-04-02 20:48:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:26,008 INFO L495 AbstractCegarLoop]: Abstraction has 6834 states and 10161 transitions. [2023-04-02 20:48:26,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 10161 transitions. [2023-04-02 20:48:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-04-02 20:48:26,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:26,023 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:26,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 20:48:26,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:26,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash -693862589, now seen corresponding path program 1 times [2023-04-02 20:48:26,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:26,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784432360] [2023-04-02 20:48:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:26,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:26,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:26,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784432360] [2023-04-02 20:48:26,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784432360] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:26,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837146122] [2023-04-02 20:48:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:26,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:26,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:26,576 INFO L87 Difference]: Start difference. First operand 6834 states and 10161 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:26,892 INFO L93 Difference]: Finished difference Result 7412 states and 11012 transitions. [2023-04-02 20:48:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:26,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2023-04-02 20:48:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:26,933 INFO L225 Difference]: With dead ends: 7412 [2023-04-02 20:48:26,934 INFO L226 Difference]: Without dead ends: 7406 [2023-04-02 20:48:26,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:26,953 INFO L413 NwaCegarLoop]: 5102 mSDtfsCounter, 558 mSDsluCounter, 4992 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 10094 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:26,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 10094 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 20:48:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7406 states. [2023-04-02 20:48:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7406 to 7398. [2023-04-02 20:48:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7398 states, 7394 states have (on average 1.4870164998647553) internal successors, (10995), 7394 states have internal predecessors, (10995), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7398 states to 7398 states and 10998 transitions. [2023-04-02 20:48:27,356 INFO L78 Accepts]: Start accepts. Automaton has 7398 states and 10998 transitions. Word has length 284 [2023-04-02 20:48:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:27,373 INFO L495 AbstractCegarLoop]: Abstraction has 7398 states and 10998 transitions. [2023-04-02 20:48:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 7398 states and 10998 transitions. [2023-04-02 20:48:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-04-02 20:48:27,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:27,378 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:27,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 20:48:27,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:27,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash -24115305, now seen corresponding path program 1 times [2023-04-02 20:48:27,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:27,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68327835] [2023-04-02 20:48:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:27,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:27,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68327835] [2023-04-02 20:48:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68327835] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:27,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:27,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:27,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954889184] [2023-04-02 20:48:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:27,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:27,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:27,811 INFO L87 Difference]: Start difference. First operand 7398 states and 10998 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:28,383 INFO L93 Difference]: Finished difference Result 21048 states and 31302 transitions. [2023-04-02 20:48:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2023-04-02 20:48:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:28,415 INFO L225 Difference]: With dead ends: 21048 [2023-04-02 20:48:28,416 INFO L226 Difference]: Without dead ends: 14220 [2023-04-02 20:48:28,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:28,433 INFO L413 NwaCegarLoop]: 5032 mSDtfsCounter, 4729 mSDsluCounter, 4992 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4729 SdHoareTripleChecker+Valid, 10024 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:28,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4729 Valid, 10024 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 20:48:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14220 states. [2023-04-02 20:48:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14220 to 14172. [2023-04-02 20:48:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14168 states have (on average 1.487789384528515) internal successors, (21079), 14168 states have internal predecessors, (21079), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 21082 transitions. [2023-04-02 20:48:28,701 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 21082 transitions. Word has length 285 [2023-04-02 20:48:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:28,701 INFO L495 AbstractCegarLoop]: Abstraction has 14172 states and 21082 transitions. [2023-04-02 20:48:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 21082 transitions. [2023-04-02 20:48:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-04-02 20:48:28,706 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:28,706 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 20:48:28,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:28,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1459502557, now seen corresponding path program 1 times [2023-04-02 20:48:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888607777] [2023-04-02 20:48:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:28,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:28,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888607777] [2023-04-02 20:48:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888607777] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:28,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:28,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790863693] [2023-04-02 20:48:28,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:28,894 INFO L87 Difference]: Start difference. First operand 14172 states and 21082 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:29,192 INFO L93 Difference]: Finished difference Result 27774 states and 41322 transitions. [2023-04-02 20:48:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2023-04-02 20:48:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:29,223 INFO L225 Difference]: With dead ends: 27774 [2023-04-02 20:48:29,223 INFO L226 Difference]: Without dead ends: 14172 [2023-04-02 20:48:29,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:29,250 INFO L413 NwaCegarLoop]: 5853 mSDtfsCounter, 4732 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4732 SdHoareTripleChecker+Valid, 6683 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:29,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4732 Valid, 6683 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 20:48:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2023-04-02 20:48:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 14166. [2023-04-02 20:48:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14166 states, 14162 states have (on average 1.4872193193051828) internal successors, (21062), 14162 states have internal predecessors, (21062), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14166 states to 14166 states and 21065 transitions. [2023-04-02 20:48:29,488 INFO L78 Accepts]: Start accepts. Automaton has 14166 states and 21065 transitions. Word has length 293 [2023-04-02 20:48:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:29,488 INFO L495 AbstractCegarLoop]: Abstraction has 14166 states and 21065 transitions. [2023-04-02 20:48:29,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 14166 states and 21065 transitions. [2023-04-02 20:48:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-04-02 20:48:29,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:29,494 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 20:48:29,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:29,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:29,494 INFO L85 PathProgramCache]: Analyzing trace with hash 251258110, now seen corresponding path program 1 times [2023-04-02 20:48:29,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416821338] [2023-04-02 20:48:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:29,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416821338] [2023-04-02 20:48:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416821338] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:29,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682945317] [2023-04-02 20:48:29,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:29,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:29,687 INFO L87 Difference]: Start difference. First operand 14166 states and 21065 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:29,918 INFO L93 Difference]: Finished difference Result 25456 states and 37867 transitions. [2023-04-02 20:48:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2023-04-02 20:48:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:29,945 INFO L225 Difference]: With dead ends: 25456 [2023-04-02 20:48:29,945 INFO L226 Difference]: Without dead ends: 11860 [2023-04-02 20:48:29,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:29,971 INFO L413 NwaCegarLoop]: 5061 mSDtfsCounter, 3321 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3321 SdHoareTripleChecker+Valid, 6715 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:29,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3321 Valid, 6715 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 20:48:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11860 states. [2023-04-02 20:48:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11860 to 11858. [2023-04-02 20:48:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11858 states, 11854 states have (on average 1.486755525560992) internal successors, (17624), 11854 states have internal predecessors, (17624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11858 states to 11858 states and 17627 transitions. [2023-04-02 20:48:30,166 INFO L78 Accepts]: Start accepts. Automaton has 11858 states and 17627 transitions. Word has length 298 [2023-04-02 20:48:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:30,166 INFO L495 AbstractCegarLoop]: Abstraction has 11858 states and 17627 transitions. [2023-04-02 20:48:30,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11858 states and 17627 transitions. [2023-04-02 20:48:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-04-02 20:48:30,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:30,172 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:30,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 20:48:30,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:30,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:30,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1253199431, now seen corresponding path program 1 times [2023-04-02 20:48:30,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:30,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674548315] [2023-04-02 20:48:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:30,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:48:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 20:48:30,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:48:30,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674548315] [2023-04-02 20:48:30,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674548315] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:48:30,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:48:30,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:48:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138523635] [2023-04-02 20:48:30,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:48:30,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:48:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:48:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:48:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:30,391 INFO L87 Difference]: Start difference. First operand 11858 states and 17627 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:48:30,601 INFO L93 Difference]: Finished difference Result 19794 states and 29411 transitions. [2023-04-02 20:48:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:48:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2023-04-02 20:48:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:48:30,620 INFO L225 Difference]: With dead ends: 19794 [2023-04-02 20:48:30,620 INFO L226 Difference]: Without dead ends: 8512 [2023-04-02 20:48:30,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:48:30,640 INFO L413 NwaCegarLoop]: 5068 mSDtfsCounter, 829 mSDsluCounter, 4135 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 9203 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:48:30,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 9203 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 20:48:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2023-04-02 20:48:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2023-04-02 20:48:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8506 states have (on average 1.4841288502233718) internal successors, (12624), 8506 states have internal predecessors, (12624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 12627 transitions. [2023-04-02 20:48:30,768 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 12627 transitions. Word has length 303 [2023-04-02 20:48:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:48:30,769 INFO L495 AbstractCegarLoop]: Abstraction has 8510 states and 12627 transitions. [2023-04-02 20:48:30,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:48:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 12627 transitions. [2023-04-02 20:48:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-04-02 20:48:30,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:48:30,773 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:48:30,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 20:48:30,774 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:48:30,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:48:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2000126219, now seen corresponding path program 1 times [2023-04-02 20:48:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:48:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397869743] [2023-04-02 20:48:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:48:30,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:48:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat