/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/array-examples/standard_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:17:47,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:17:47,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:17:48,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 14:17:48,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:17:48,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:17:48,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:17:48,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:17:48,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:17:48,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:17:48,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:17:48,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:17:48,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:17:48,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:17:48,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:17:48,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:17:48,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:17:48,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:17:48,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:17:48,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:17:48,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:17:48,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:17:48,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:17:48,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:17:48,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:17:48,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:17:48,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:17:48,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:17:48,043 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 14:17:48,067 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:17:48,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:17:48,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:17:48,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:17:48,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:17:48,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:17:48,068 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:17:48,068 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:17:48,068 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:17:48,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:17:48,069 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:17:48,069 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:17:48,069 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:17:48,069 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:17:48,069 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:17:48,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:17:48,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:17:48,070 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:17:48,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:17:48,070 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:17:48,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:17:48,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:17:48,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:17:48,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:17:48,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:17:48,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:17:48,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:17:48,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:17:48,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:17:48,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:17:48,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:17:48,265 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:17:48,265 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:17:48,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_09.i [2023-04-02 14:17:49,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:17:49,464 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:17:49,465 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i [2023-04-02 14:17:49,469 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afd9bfe5/52fd6bead2ab4d41b6ec256b3cf659f3/FLAGc8c416665 [2023-04-02 14:17:49,483 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afd9bfe5/52fd6bead2ab4d41b6ec256b3cf659f3 [2023-04-02 14:17:49,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:17:49,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:17:49,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:17:49,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:17:49,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:17:49,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f05741b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49, skipping insertion in model container [2023-04-02 14:17:49,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:17:49,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:17:49,598 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/array-examples/standard_two_index_09.i[814,827] [2023-04-02 14:17:49,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:17:49,618 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:17:49,626 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/array-examples/standard_two_index_09.i[814,827] [2023-04-02 14:17:49,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:17:49,644 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:17:49,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49 WrapperNode [2023-04-02 14:17:49,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:17:49,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:17:49,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:17:49,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:17:49,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:17:49,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:17:49,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:17:49,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:17:49,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (1/1) ... [2023-04-02 14:17:49,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:17:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:49,686 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 14:17:49,709 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 14:17:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:17:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:17:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:17:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:17:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:17:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:17:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:17:49,773 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:17:49,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:17:49,930 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:17:49,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:17:49,946 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:17:49,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:17:49 BoogieIcfgContainer [2023-04-02 14:17:49,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:17:49,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:17:49,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:17:49,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:17:49,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:17:49" (1/3) ... [2023-04-02 14:17:49,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7a5462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:17:49, skipping insertion in model container [2023-04-02 14:17:49,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:17:49" (2/3) ... [2023-04-02 14:17:49,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7a5462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:17:49, skipping insertion in model container [2023-04-02 14:17:49,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:17:49" (3/3) ... [2023-04-02 14:17:49,953 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2023-04-02 14:17:49,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:17:49,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:17:49,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:17:50,000 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;@53c43e1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:17:50,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:17:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:17:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:17:50,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:50,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:50,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:50,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1320884995, now seen corresponding path program 1 times [2023-04-02 14:17:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:50,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474608562] [2023-04-02 14:17:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:50,246 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 14:17:50,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474608562] [2023-04-02 14:17:50,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474608562] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:17:50,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:17:50,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:17:50,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746592938] [2023-04-02 14:17:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:17:50,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:17:50,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:17:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:17:50,274 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:50,302 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-02 14:17:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:17:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 14:17:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:50,316 INFO L225 Difference]: With dead ends: 33 [2023-04-02 14:17:50,316 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 14:17:50,318 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 14:17:50,321 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:50,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:17:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 14:17:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-02 14:17:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-02 14:17:50,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-04-02 14:17:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:50,349 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-02 14:17:50,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-02 14:17:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 14:17:50,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:50,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:50,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:17:50,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:50,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash -256932371, now seen corresponding path program 1 times [2023-04-02 14:17:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358509287] [2023-04-02 14:17:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:17:50,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:50,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358509287] [2023-04-02 14:17:50,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358509287] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:50,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78598014] [2023-04-02 14:17:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:50,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:50,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:50,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:50,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:17:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:50,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:17:50,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:17:50,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:17:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78598014] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:17:50,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:17:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-02 14:17:50,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228439912] [2023-04-02 14:17:50,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:17:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:17:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:17:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:17:50,559 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:50,583 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-04-02 14:17:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:17:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 14:17:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:50,584 INFO L225 Difference]: With dead ends: 30 [2023-04-02 14:17:50,585 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 14:17:50,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:17:50,586 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:50,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:17:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 14:17:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-04-02 14:17:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 14:17:50,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-02 14:17:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:50,593 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 14:17:50,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 14:17:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:17:50,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:50,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:50,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:50,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:50,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:50,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 236958900, now seen corresponding path program 1 times [2023-04-02 14:17:50,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:50,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562653882] [2023-04-02 14:17:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:17:50,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:50,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562653882] [2023-04-02 14:17:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562653882] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236243009] [2023-04-02 14:17:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:50,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:50,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:50,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:17:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:50,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:17:50,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:17:50,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:17:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236243009] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416789895] [2023-04-02 14:17:51,007 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:17:51,007 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:51,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:51,012 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:51,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:51,118 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:51,342 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:17:51,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:51,384 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:51,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_1| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:51,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:51,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:51,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:17:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085533200] [2023-04-02 14:17:51,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:17:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:17:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:17:51,784 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:51,830 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-04-02 14:17:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:17:51,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 14:17:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:51,833 INFO L225 Difference]: With dead ends: 39 [2023-04-02 14:17:51,833 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 14:17:51,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:17:51,835 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:51,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:17:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 14:17:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-04-02 14:17:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-02 14:17:51,844 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2023-04-02 14:17:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:51,844 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-02 14:17:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-02 14:17:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 14:17:51,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:51,846 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:51,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 14:17:52,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:17:52,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:52,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1112077789, now seen corresponding path program 2 times [2023-04-02 14:17:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:52,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267488305] [2023-04-02 14:17:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:52,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:17:52,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267488305] [2023-04-02 14:17:52,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267488305] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360499387] [2023-04-02 14:17:52,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:17:52,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:52,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:52,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:17:52,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:17:52,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:17:52,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:17:52,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:17:52,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:17:52,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360499387] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:52,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866597182] [2023-04-02 14:17:52,320 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:17:52,320 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:52,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:52,320 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:52,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:52,335 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:52,411 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:17:52,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:52,429 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:52,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '527#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_2| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:52,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:52,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:52,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-02 14:17:52,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954904347] [2023-04-02 14:17:52,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:52,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 14:17:52,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 14:17:52,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-04-02 14:17:52,740 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:52,796 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-04-02 14:17:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 14:17:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 14:17:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:52,798 INFO L225 Difference]: With dead ends: 56 [2023-04-02 14:17:52,798 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 14:17:52,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-04-02 14:17:52,800 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:52,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:17:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 14:17:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-04-02 14:17:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 14:17:52,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2023-04-02 14:17:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:52,810 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 14:17:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 14:17:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 14:17:52,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:52,811 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:52,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 14:17:53,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:53,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:53,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash 175052189, now seen corresponding path program 3 times [2023-04-02 14:17:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:53,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817073] [2023-04-02 14:17:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:53,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:17:53,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:53,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817073] [2023-04-02 14:17:53,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817073] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:53,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154727259] [2023-04-02 14:17:53,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:17:53,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:53,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:53,181 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:53,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:17:53,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:17:53,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:17:53,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 14:17:53,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:17:53,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:17:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154727259] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:53,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929117084] [2023-04-02 14:17:53,359 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:17:53,360 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:53,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:53,360 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:53,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:53,377 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:53,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:17:53,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:53,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:53,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '845#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) 4))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_3|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_3| |v_main_~#a~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:53,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:53,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-04-02 14:17:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581686492] [2023-04-02 14:17:53,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 14:17:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 14:17:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=791, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:17:53,792 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:53,881 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-02 14:17:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 14:17:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-02 14:17:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:53,882 INFO L225 Difference]: With dead ends: 84 [2023-04-02 14:17:53,882 INFO L226 Difference]: Without dead ends: 68 [2023-04-02 14:17:53,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=791, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:17:53,884 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:53,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:17:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-02 14:17:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2023-04-02 14:17:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-04-02 14:17:53,888 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 24 [2023-04-02 14:17:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:53,888 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-04-02 14:17:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-04-02 14:17:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 14:17:53,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:53,889 INFO L195 NwaCegarLoop]: trace histogram [20, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:53,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:54,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:54,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:54,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash 566203517, now seen corresponding path program 4 times [2023-04-02 14:17:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:54,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710411108] [2023-04-02 14:17:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:54,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 14:17:54,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:54,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710411108] [2023-04-02 14:17:54,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710411108] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:54,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866937560] [2023-04-02 14:17:54,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:17:54,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:54,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:54,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:54,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:17:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:54,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 14:17:54,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 14:17:54,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 14:17:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866937560] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:54,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802998785] [2023-04-02 14:17:54,849 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:17:54,849 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:54,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:54,849 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:54,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:54,866 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:54,925 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:17:54,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:54,938 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:55,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1372#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_4| |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_4|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:55,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:55,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:55,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 23] total 51 [2023-04-02 14:17:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798000777] [2023-04-02 14:17:55,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 14:17:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 14:17:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1409, Invalid=2373, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:17:55,262 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:55,405 INFO L93 Difference]: Finished difference Result 130 states and 177 transitions. [2023-04-02 14:17:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-02 14:17:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-04-02 14:17:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:55,407 INFO L225 Difference]: With dead ends: 130 [2023-04-02 14:17:55,407 INFO L226 Difference]: Without dead ends: 112 [2023-04-02 14:17:55,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1409, Invalid=2373, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:17:55,408 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:55,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 65 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:17:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-02 14:17:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 76. [2023-04-02 14:17:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2023-04-02 14:17:55,415 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2023-04-02 14:17:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:55,415 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2023-04-02 14:17:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2023-04-02 14:17:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 14:17:55,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:55,416 INFO L195 NwaCegarLoop]: trace histogram [48, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:55,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:55,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:55,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:55,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1854543299, now seen corresponding path program 5 times [2023-04-02 14:17:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:55,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712709058] [2023-04-02 14:17:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:55,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-04-02 14:17:55,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:55,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712709058] [2023-04-02 14:17:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712709058] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138270732] [2023-04-02 14:17:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:17:55,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:55,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:55,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:17:56,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-02 14:17:56,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:17:56,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 14:17:56,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-04-02 14:17:56,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-04-02 14:17:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138270732] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455766907] [2023-04-02 14:17:57,098 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:17:57,098 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:57,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:57,098 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:57,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:57,109 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:57,159 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:17:57,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:57,170 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:57,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2221#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (|v_main_~#b~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_5|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_5|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0))) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_5|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_5| |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:57,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:57,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:57,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-04-02 14:17:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994592873] [2023-04-02 14:17:57,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:57,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 14:17:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 14:17:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1061, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 14:17:57,560 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:57,765 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2023-04-02 14:17:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 14:17:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 14:17:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:57,766 INFO L225 Difference]: With dead ends: 175 [2023-04-02 14:17:57,766 INFO L226 Difference]: Without dead ends: 166 [2023-04-02 14:17:57,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1061, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 14:17:57,767 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:57,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 56 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:17:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-04-02 14:17:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 90. [2023-04-02 14:17:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:17:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2023-04-02 14:17:57,777 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 72 [2023-04-02 14:17:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:57,777 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2023-04-02 14:17:57,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:17:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2023-04-02 14:17:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 14:17:57,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:57,778 INFO L195 NwaCegarLoop]: trace histogram [48, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:57,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:57,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:57,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:57,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:57,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1135479715, now seen corresponding path program 6 times [2023-04-02 14:17:57,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:57,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421105641] [2023-04-02 14:17:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:57,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-04-02 14:17:58,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421105641] [2023-04-02 14:17:58,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421105641] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283606024] [2023-04-02 14:17:58,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:17:58,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:58,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:58,678 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:58,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:17:58,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:17:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:17:58,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 14:17:58,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-04-02 14:17:59,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:18:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-04-02 14:18:00,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283606024] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:18:00,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459543343] [2023-04-02 14:18:00,662 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:18:00,662 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:18:00,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:18:00,662 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:18:00,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:18:00,682 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:18:00,737 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:18:00,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:18:00,753 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:18:01,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3352#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int) (|v_main_~#b~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_6|) 4))) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_6| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_6|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:18:01,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:18:01,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:18:01,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 51, 51] total 122 [2023-04-02 14:18:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430200112] [2023-04-02 14:18:01,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:18:01,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-04-02 14:18:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:18:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-04-02 14:18:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7657, Invalid=9899, Unknown=0, NotChecked=0, Total=17556 [2023-04-02 14:18:01,143 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 122 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:18:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:18:01,824 INFO L93 Difference]: Finished difference Result 303 states and 417 transitions. [2023-04-02 14:18:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-04-02 14:18:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-02 14:18:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:18:01,826 INFO L225 Difference]: With dead ends: 303 [2023-04-02 14:18:01,826 INFO L226 Difference]: Without dead ends: 267 [2023-04-02 14:18:01,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10282 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7657, Invalid=9899, Unknown=0, NotChecked=0, Total=17556 [2023-04-02 14:18:01,830 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:18:01,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 74 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:18:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-04-02 14:18:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 168. [2023-04-02 14:18:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:18:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2023-04-02 14:18:01,843 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 86 [2023-04-02 14:18:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:18:01,843 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2023-04-02 14:18:01,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:18:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2023-04-02 14:18:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-02 14:18:01,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:18:01,845 INFO L195 NwaCegarLoop]: trace histogram [119, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:18:01,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 14:18:02,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:18:02,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:18:02,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:18:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1486745420, now seen corresponding path program 7 times [2023-04-02 14:18:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:18:02,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973257481] [2023-04-02 14:18:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:18:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:18:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:18:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-04-02 14:18:03,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:18:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973257481] [2023-04-02 14:18:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973257481] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:18:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301464999] [2023-04-02 14:18:03,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:18:03,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:18:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:18:03,509 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:18:03,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:18:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:18:03,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 121 conjunts are in the unsatisfiable core [2023-04-02 14:18:03,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:18:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-04-02 14:18:04,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:18:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-04-02 14:18:10,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301464999] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:18:10,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535464640] [2023-04-02 14:18:10,606 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:18:10,607 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:18:10,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:18:10,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:18:10,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:18:10,618 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:18:10,669 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:18:10,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:18:10,679 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:18:11,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5496#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_7| Int) (|v_main_~#b~0.base_BEFORE_CALL_7| Int)) (and (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_7|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_7|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_7| |v_main_~#a~0.base_BEFORE_CALL_7|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:18:11,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:18:11,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:18:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 122, 122] total 263 [2023-04-02 14:18:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416724888] [2023-04-02 14:18:11,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:18:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2023-04-02 14:18:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:18:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2023-04-02 14:18:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35011, Invalid=39791, Unknown=0, NotChecked=0, Total=74802 [2023-04-02 14:18:11,159 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 263 states, 263 states have (on average 1.0874524714828897) internal successors, (286), 263 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:18:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:18:14,505 INFO L93 Difference]: Finished difference Result 511 states and 718 transitions. [2023-04-02 14:18:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2023-04-02 14:18:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 1.0874524714828897) internal successors, (286), 263 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2023-04-02 14:18:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:18:14,509 INFO L225 Difference]: With dead ends: 511 [2023-04-02 14:18:14,510 INFO L226 Difference]: Without dead ends: 468 [2023-04-02 14:18:14,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47247 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=35011, Invalid=39791, Unknown=0, NotChecked=0, Total=74802 [2023-04-02 14:18:14,513 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 233 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 14:18:14,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 74 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 14:18:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-04-02 14:18:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 324. [2023-04-02 14:18:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.009433962264151) internal successors, (321), 318 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:18:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 326 transitions. [2023-04-02 14:18:14,528 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 326 transitions. Word has length 164 [2023-04-02 14:18:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:18:14,529 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 326 transitions. [2023-04-02 14:18:14,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 1.0874524714828897) internal successors, (286), 263 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:18:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 326 transitions. [2023-04-02 14:18:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-04-02 14:18:14,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:18:14,531 INFO L195 NwaCegarLoop]: trace histogram [260, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:18:14,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:18:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 14:18:14,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:18:14,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:18:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1437742589, now seen corresponding path program 8 times [2023-04-02 14:18:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:18:14,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210424628] [2023-04-02 14:18:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:18:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:18:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:18:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35106 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 33930 trivial. 0 not checked. [2023-04-02 14:18:17,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:18:17,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210424628] [2023-04-02 14:18:17,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210424628] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:18:17,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492568538] [2023-04-02 14:18:17,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:18:17,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:18:17,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:18:17,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:18:17,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process