/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:06:04,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:06:04,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:06:04,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:06:04,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:06:04,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:06:04,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:06:04,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:06:04,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:06:04,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:06:04,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:06:04,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:06:04,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:06:04,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:06:04,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:06:04,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:06:04,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:06:04,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:06:04,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:06:04,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:06:04,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:06:04,483 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:06:04,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:06:04,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:06:04,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:06:04,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:06:04,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:06:04,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:06:04,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:06:04,485 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:06:04,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:06:04,485 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:06:04,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:06:04,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:06:04,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:06:04,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:06:04,488 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:06:04,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:06:04,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:06:04,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:06:04,641 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:06:04,641 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:06:04,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2023-04-01 19:06:05,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:06:05,702 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:06:05,703 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2023-04-01 19:06:05,707 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997e26de8/d58ebc320aa54316ab16c8c7bcf34f88/FLAGc3d5f8f95 [2023-04-01 19:06:05,716 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997e26de8/d58ebc320aa54316ab16c8c7bcf34f88 [2023-04-01 19:06:05,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:06:05,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:06:05,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:06:05,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:06:05,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:06:05,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7056537c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05, skipping insertion in model container [2023-04-01 19:06:05,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:06:05,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:06:05,845 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-programs/partial_mod_count_limited_base.c[334,347] [2023-04-01 19:06:05,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:06:05,872 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:06:05,881 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-programs/partial_mod_count_limited_base.c[334,347] [2023-04-01 19:06:05,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:06:05,904 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:06:05,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05 WrapperNode [2023-04-01 19:06:05,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:06:05,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:06:05,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:06:05,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:06:05,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:06:05,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:06:05,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:06:05,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:06:05,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (1/1) ... [2023-04-01 19:06:05,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:06:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:05,961 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) [2023-04-01 19:06:05,965 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 [2023-04-01 19:06:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:06:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:06:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:06:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:06:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:06:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:06:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:06:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:06:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:06:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:06:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:06:06,048 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:06:06,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:06:06,165 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:06:06,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:06:06,170 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 19:06:06,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:06:06 BoogieIcfgContainer [2023-04-01 19:06:06,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:06:06,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:06:06,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:06:06,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:06:06,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:06:05" (1/3) ... [2023-04-01 19:06:06,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161666a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:06:06, skipping insertion in model container [2023-04-01 19:06:06,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:06:05" (2/3) ... [2023-04-01 19:06:06,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161666a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:06:06, skipping insertion in model container [2023-04-01 19:06:06,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:06:06" (3/3) ... [2023-04-01 19:06:06,176 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2023-04-01 19:06:06,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:06:06,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:06:06,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:06:06,252 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=PETRI_NET, 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;@2bb03dee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:06:06,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:06:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:06:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 19:06:06,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:06,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:06,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:06,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2033071227, now seen corresponding path program 1 times [2023-04-01 19:06:06,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:06,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108431617] [2023-04-01 19:06:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:06:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:06:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:06:06,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108431617] [2023-04-01 19:06:06,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108431617] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:06:06,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:06:06,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:06:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420760110] [2023-04-01 19:06:06,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:06:06,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:06:06,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:06:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:06:06,456 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:06:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:06,529 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2023-04-01 19:06:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:06:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-04-01 19:06:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:06,534 INFO L225 Difference]: With dead ends: 57 [2023-04-01 19:06:06,535 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 19:06:06,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:06:06,539 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:06,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:06:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 19:06:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 19:06:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:06:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 19:06:06,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2023-04-01 19:06:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:06,566 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 19:06:06,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:06:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 19:06:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 19:06:06,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:06,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:06:06,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:06,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2003730631, now seen corresponding path program 1 times [2023-04-01 19:06:06,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:06,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776142950] [2023-04-01 19:06:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:06,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:06:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:06:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:06:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776142950] [2023-04-01 19:06:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776142950] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:06:06,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:06:06,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:06:06,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137728704] [2023-04-01 19:06:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:06:06,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:06:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:06:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:06:06,687 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:06:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:06,806 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2023-04-01 19:06:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:06:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-01 19:06:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:06,809 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:06:06,809 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:06:06,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 19:06:06,816 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:06,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 8 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:06:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:06:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 19:06:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:06:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-01 19:06:06,828 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2023-04-01 19:06:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:06,828 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-01 19:06:06,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:06:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-01 19:06:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 19:06:06,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:06,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:06,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:06:06,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:06,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1543382071, now seen corresponding path program 1 times [2023-04-01 19:06:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:06,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767899323] [2023-04-01 19:06:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:06,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:06:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:06:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:06:06,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:06,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767899323] [2023-04-01 19:06:06,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767899323] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:06:06,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:06:06,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 19:06:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608381061] [2023-04-01 19:06:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:06:06,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 19:06:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 19:06:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 19:06:06,948 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:06:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:07,054 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-04-01 19:06:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 19:06:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 19:06:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:07,055 INFO L225 Difference]: With dead ends: 44 [2023-04-01 19:06:07,055 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 19:06:07,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:06:07,056 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:07,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 27 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:06:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 19:06:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-04-01 19:06:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:06:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-04-01 19:06:07,063 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 25 [2023-04-01 19:06:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:07,063 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-04-01 19:06:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:06:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-04-01 19:06:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 19:06:07,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:07,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:07,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 19:06:07,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:07,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash -935431050, now seen corresponding path program 1 times [2023-04-01 19:06:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:07,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746909544] [2023-04-01 19:06:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:07,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:06:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 19:06:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 19:06:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 19:06:07,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:07,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746909544] [2023-04-01 19:06:07,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746909544] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:06:07,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112100705] [2023-04-01 19:06:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:07,159 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) [2023-04-01 19:06:07,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:06:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:07,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:06:07,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:06:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:06:07,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:06:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 19:06:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112100705] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:06:07,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:06:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-04-01 19:06:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247028288] [2023-04-01 19:06:07,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:06:07,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 19:06:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 19:06:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-04-01 19:06:07,319 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 19:06:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:07,488 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2023-04-01 19:06:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 19:06:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2023-04-01 19:06:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:07,492 INFO L225 Difference]: With dead ends: 115 [2023-04-01 19:06:07,492 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 19:06:07,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2023-04-01 19:06:07,498 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 172 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:07,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 11 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:06:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 19:06:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2023-04-01 19:06:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:06:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2023-04-01 19:06:07,519 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 33 [2023-04-01 19:06:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:07,519 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2023-04-01 19:06:07,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 19:06:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2023-04-01 19:06:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:06:07,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:07,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:07,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:06:07,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:07,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:07,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash -567978952, now seen corresponding path program 1 times [2023-04-01 19:06:07,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:07,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922832552] [2023-04-01 19:06:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:07,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:07,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:06:07,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406996814] [2023-04-01 19:06:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:07,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:07,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:07,766 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) [2023-04-01 19:06:07,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:06:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:06:07,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 19:06:07,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:06:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:06:07,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:06:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 19:06:08,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922832552] [2023-04-01 19:06:08,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:06:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406996814] [2023-04-01 19:06:08,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406996814] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:06:08,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:06:08,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 19:06:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246167427] [2023-04-01 19:06:08,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:06:08,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 19:06:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 19:06:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-04-01 19:06:08,057 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:08,264 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2023-04-01 19:06:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 19:06:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2023-04-01 19:06:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:08,266 INFO L225 Difference]: With dead ends: 221 [2023-04-01 19:06:08,266 INFO L226 Difference]: Without dead ends: 189 [2023-04-01 19:06:08,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-04-01 19:06:08,267 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 198 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:08,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 70 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:06:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-04-01 19:06:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 86. [2023-04-01 19:06:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:06:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2023-04-01 19:06:08,281 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 48 [2023-04-01 19:06:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:08,281 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2023-04-01 19:06:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2023-04-01 19:06:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 19:06:08,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:08,282 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:08,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:06:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:08,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:08,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1825589254, now seen corresponding path program 2 times [2023-04-01 19:06:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:08,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505769445] [2023-04-01 19:06:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:08,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:06:08,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984335951] [2023-04-01 19:06:08,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:06:08,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:08,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:08,553 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) [2023-04-01 19:06:08,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:06:08,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:06:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:06:08,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 19:06:08,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:06:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:06:08,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:06:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 19:06:09,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:09,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505769445] [2023-04-01 19:06:09,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:06:09,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984335951] [2023-04-01 19:06:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984335951] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:06:09,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:06:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 19:06:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250177039] [2023-04-01 19:06:09,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:06:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:06:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:06:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:06:09,111 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:09,598 INFO L93 Difference]: Finished difference Result 440 states and 632 transitions. [2023-04-01 19:06:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:06:09,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2023-04-01 19:06:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:09,600 INFO L225 Difference]: With dead ends: 440 [2023-04-01 19:06:09,600 INFO L226 Difference]: Without dead ends: 393 [2023-04-01 19:06:09,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 19:06:09,601 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 408 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:09,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 158 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:06:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-04-01 19:06:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2023-04-01 19:06:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:06:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2023-04-01 19:06:09,619 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2023-04-01 19:06:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:09,619 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2023-04-01 19:06:09,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2023-04-01 19:06:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 19:06:09,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:09,621 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:09,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 19:06:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:09,826 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:09,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1125932218, now seen corresponding path program 3 times [2023-04-01 19:06:09,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291900361] [2023-04-01 19:06:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:09,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:09,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:06:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945783962] [2023-04-01 19:06:09,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:06:09,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:09,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:09,873 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) [2023-04-01 19:06:09,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:06:12,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-01 19:06:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:06:12,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 19:06:12,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:06:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 613 proven. 319 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-04-01 19:06:13,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:06:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 932 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-04-01 19:06:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291900361] [2023-04-01 19:06:13,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:06:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945783962] [2023-04-01 19:06:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945783962] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:06:13,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:06:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-04-01 19:06:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206400738] [2023-04-01 19:06:13,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:06:13,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 19:06:13,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 19:06:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=594, Unknown=0, NotChecked=0, Total=992 [2023-04-01 19:06:13,738 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:15,458 INFO L93 Difference]: Finished difference Result 924 states and 1310 transitions. [2023-04-01 19:06:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-04-01 19:06:15,458 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2023-04-01 19:06:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:15,463 INFO L225 Difference]: With dead ends: 924 [2023-04-01 19:06:15,463 INFO L226 Difference]: Without dead ends: 901 [2023-04-01 19:06:15,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4602 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4122, Invalid=7008, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 19:06:15,467 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 578 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:15,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 154 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:06:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2023-04-01 19:06:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 410. [2023-04-01 19:06:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 399 states have (on average 1.3609022556390977) internal successors, (543), 399 states have internal predecessors, (543), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:06:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 554 transitions. [2023-04-01 19:06:15,495 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 554 transitions. Word has length 138 [2023-04-01 19:06:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:15,495 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 554 transitions. [2023-04-01 19:06:15,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 554 transitions. [2023-04-01 19:06:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 19:06:15,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:15,497 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 14, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:15,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:06:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:15,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:15,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 471464632, now seen corresponding path program 4 times [2023-04-01 19:06:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657170845] [2023-04-01 19:06:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:15,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:06:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467252628] [2023-04-01 19:06:15,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:06:15,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:15,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:15,729 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) [2023-04-01 19:06:15,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:06:16,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:06:16,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:06:16,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 19:06:16,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:06:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:06:16,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:06:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 19:06:17,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:06:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657170845] [2023-04-01 19:06:17,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:06:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467252628] [2023-04-01 19:06:17,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467252628] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:06:17,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:06:17,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 19:06:17,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428051888] [2023-04-01 19:06:17,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:06:17,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 19:06:17,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:06:17,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 19:06:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 19:06:17,084 INFO L87 Difference]: Start difference. First operand 410 states and 554 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:06:18,526 INFO L93 Difference]: Finished difference Result 2697 states and 3801 transitions. [2023-04-01 19:06:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 19:06:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2023-04-01 19:06:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:06:18,536 INFO L225 Difference]: With dead ends: 2697 [2023-04-01 19:06:18,536 INFO L226 Difference]: Without dead ends: 2361 [2023-04-01 19:06:18,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 19:06:18,540 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1238 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:06:18,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 253 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:06:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2023-04-01 19:06:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1430. [2023-04-01 19:06:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1419 states have (on average 1.3805496828752644) internal successors, (1959), 1419 states have internal predecessors, (1959), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:06:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 1970 transitions. [2023-04-01 19:06:18,619 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 1970 transitions. Word has length 138 [2023-04-01 19:06:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:06:18,620 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 1970 transitions. [2023-04-01 19:06:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:06:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 1970 transitions. [2023-04-01 19:06:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-04-01 19:06:18,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:06:18,623 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 24, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:06:18,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 19:06:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:18,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:06:18,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:06:18,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1102232840, now seen corresponding path program 5 times [2023-04-01 19:06:18,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:06:18,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524794870] [2023-04-01 19:06:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:06:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:06:18,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:06:18,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922811493] [2023-04-01 19:06:18,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:06:18,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:06:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:06:18,881 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) [2023-04-01 19:06:18,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process