/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/nla-digbench-scaling/divbin2_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:30:01,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:30:01,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:30:01,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:30:01,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:30:01,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:30:01,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:30:01,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:30:01,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:30:01,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:30:01,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:30:01,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:30:01,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:30:01,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:30:01,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:30:01,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:30:01,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:30:01,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:30:01,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:30:01,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:30:01,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:30:01,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:30:01,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:30:01,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:30:01,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:30:01,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:30:01,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:30:01,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:30:01,177 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 [2023-03-31 00:30:01,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:30:01,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:30:01,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:30:01,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:30:01,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:30:01,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:30:01,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:30:01,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:30:01,202 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:30:01,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:30:01,203 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:30:01,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:30:01,204 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:30:01,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:30:01,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:30:01,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:30:01,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:30:01,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:30:01,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:30:01,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:30:01,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:30:01,206 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:30:01,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:30:01,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:30:01,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:30:01,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:30:01,458 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:30:01,459 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:30:01,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2023-03-31 00:30:02,618 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:30:02,789 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:30:02,789 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2023-03-31 00:30:02,794 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc5b68b0/75e0f16788b245da936090e5bf38740c/FLAG4f979ff13 [2023-03-31 00:30:02,807 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc5b68b0/75e0f16788b245da936090e5bf38740c [2023-03-31 00:30:02,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:30:02,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:30:02,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:30:02,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:30:02,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:30:02,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:30:02" (1/1) ... [2023-03-31 00:30:02,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dabf3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:02, skipping insertion in model container [2023-03-31 00:30:02,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:30:02" (1/1) ... [2023-03-31 00:30:02,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:30:02,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:30:02,955 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/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2023-03-31 00:30:02,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:30:02,975 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:30:02,987 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/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2023-03-31 00:30:02,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:30:03,005 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:30:03,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03 WrapperNode [2023-03-31 00:30:03,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:30:03,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:30:03,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:30:03,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:30:03,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,029 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:30:03,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:30:03,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:30:03,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:30:03,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (1/1) ... [2023-03-31 00:30:03,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:30:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:03,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 00:30:03,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:30:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:30:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:30:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:30:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:30:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:30:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:30:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:30:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:30:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:30:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:30:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:30:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:30:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:30:03,161 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:30:03,162 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:30:03,351 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:30:03,355 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:30:03,355 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 00:30:03,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:30:03 BoogieIcfgContainer [2023-03-31 00:30:03,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:30:03,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:30:03,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:30:03,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:30:03,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:30:02" (1/3) ... [2023-03-31 00:30:03,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b0576a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:30:03, skipping insertion in model container [2023-03-31 00:30:03,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:30:03" (2/3) ... [2023-03-31 00:30:03,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b0576a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:30:03, skipping insertion in model container [2023-03-31 00:30:03,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:30:03" (3/3) ... [2023-03-31 00:30:03,363 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.i [2023-03-31 00:30:03,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:30:03,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:30:03,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:30:03,419 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;@6b373fea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:30:03,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:30:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:30:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 00:30:03,435 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:03,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:03,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:03,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2023-03-31 00:30:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:03,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598410978] [2023-03-31 00:30:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:03,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:03,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598410978] [2023-03-31 00:30:03,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:30:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489053180] [2023-03-31 00:30:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:03,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:03,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:03,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:30:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:03,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:30:03,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:03,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:03,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489053180] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:03,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:30:03,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689544655] [2023-03-31 00:30:03,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:03,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:30:03,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:30:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:30:03,707 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:03,734 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-03-31 00:30:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:30:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 00:30:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:03,745 INFO L225 Difference]: With dead ends: 43 [2023-03-31 00:30:03,746 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 00:30:03,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:30:03,754 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:03,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 00:30:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 00:30:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-03-31 00:30:03,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-03-31 00:30:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:03,790 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-03-31 00:30:03,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-03-31 00:30:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 00:30:03,791 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:03,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:03,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:03,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 00:30:03,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:03,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2023-03-31 00:30:03,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965779585] [2023-03-31 00:30:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:03,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:04,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965779585] [2023-03-31 00:30:04,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:30:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502230965] [2023-03-31 00:30:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:04,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:04,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:04,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:30:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:04,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:30:04,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:04,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:04,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502230965] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:04,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:04,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:30:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271881794] [2023-03-31 00:30:04,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:04,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:30:04,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:30:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:30:04,168 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:04,185 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-03-31 00:30:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:30:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 00:30:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:04,186 INFO L225 Difference]: With dead ends: 35 [2023-03-31 00:30:04,186 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 00:30:04,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:30:04,188 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:04,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 00:30:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 00:30:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-03-31 00:30:04,194 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2023-03-31 00:30:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:04,194 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-03-31 00:30:04,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-03-31 00:30:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 00:30:04,195 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:04,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:04,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 00:30:04,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:04,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2023-03-31 00:30:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657448502] [2023-03-31 00:30:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:04,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756151736] [2023-03-31 00:30:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:04,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:04,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:04,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:04,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:30:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:04,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:30:04,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:04,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:04,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:04,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657448502] [2023-03-31 00:30:04,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:04,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756151736] [2023-03-31 00:30:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756151736] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:04,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:30:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268564527] [2023-03-31 00:30:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:30:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:30:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:30:04,521 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:04,538 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-03-31 00:30:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:30:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 00:30:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:04,540 INFO L225 Difference]: With dead ends: 34 [2023-03-31 00:30:04,540 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 00:30:04,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:30:04,541 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:04,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 00:30:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-03-31 00:30:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-03-31 00:30:04,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2023-03-31 00:30:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:04,549 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-03-31 00:30:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-03-31 00:30:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 00:30:04,550 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:04,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:04,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:04,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:04,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2023-03-31 00:30:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:04,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033104703] [2023-03-31 00:30:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:04,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:04,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303831310] [2023-03-31 00:30:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:04,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:04,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:04,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:04,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:30:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:04,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:30:04,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:05,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033104703] [2023-03-31 00:30:05,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303831310] [2023-03-31 00:30:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303831310] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:05,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:05,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:30:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661559682] [2023-03-31 00:30:05,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:05,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:30:05,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:30:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:30:05,005 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:05,082 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2023-03-31 00:30:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:30:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 00:30:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:05,087 INFO L225 Difference]: With dead ends: 35 [2023-03-31 00:30:05,087 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 00:30:05,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:30:05,092 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:05,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 00:30:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 00:30:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:30:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-03-31 00:30:05,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2023-03-31 00:30:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:05,105 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-03-31 00:30:05,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-03-31 00:30:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:30:05,106 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:05,106 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:05,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:05,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:05,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:05,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2023-03-31 00:30:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:05,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941325649] [2023-03-31 00:30:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:05,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:05,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:05,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155928172] [2023-03-31 00:30:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:05,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:05,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:05,329 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) [2023-03-31 00:30:05,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:30:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:05,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:30:05,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:05,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:05,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941325649] [2023-03-31 00:30:05,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155928172] [2023-03-31 00:30:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155928172] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:05,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:05,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 00:30:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3411633] [2023-03-31 00:30:05,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:30:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:30:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:30:05,481 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:30:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:05,551 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2023-03-31 00:30:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:30:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 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 17 [2023-03-31 00:30:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:05,570 INFO L225 Difference]: With dead ends: 66 [2023-03-31 00:30:05,570 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 00:30:05,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:30:05,571 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:05,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 115 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 00:30:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2023-03-31 00:30:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:30:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-03-31 00:30:05,578 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2023-03-31 00:30:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:05,578 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-03-31 00:30:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:30:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-03-31 00:30:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:30:05,579 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:05,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:05,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:05,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:05,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:05,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2023-03-31 00:30:05,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255034947] [2023-03-31 00:30:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:05,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:05,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:05,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920094505] [2023-03-31 00:30:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:05,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:05,802 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) [2023-03-31 00:30:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:30:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:05,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 00:30:05,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:05,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:05,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:05,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255034947] [2023-03-31 00:30:05,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:05,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920094505] [2023-03-31 00:30:05,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920094505] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:05,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:05,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-03-31 00:30:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391478485] [2023-03-31 00:30:05,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:30:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:30:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:30:05,951 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:30:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:06,040 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2023-03-31 00:30:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 00:30:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 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 18 [2023-03-31 00:30:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:06,042 INFO L225 Difference]: With dead ends: 91 [2023-03-31 00:30:06,042 INFO L226 Difference]: Without dead ends: 84 [2023-03-31 00:30:06,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:30:06,043 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:06,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 142 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-03-31 00:30:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2023-03-31 00:30:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:30:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-03-31 00:30:06,054 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2023-03-31 00:30:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:06,054 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-03-31 00:30:06,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:30:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-03-31 00:30:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:30:06,055 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:06,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:06,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:06,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:06,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:06,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1617669815, now seen corresponding path program 1 times [2023-03-31 00:30:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:06,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488706237] [2023-03-31 00:30:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:06,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:06,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:06,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928015299] [2023-03-31 00:30:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:06,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:06,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:06,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:30:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:06,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:30:06,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:06,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:07,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:07,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488706237] [2023-03-31 00:30:07,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:07,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928015299] [2023-03-31 00:30:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928015299] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:07,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:07,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-03-31 00:30:07,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456318944] [2023-03-31 00:30:07,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:07,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 00:30:07,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 00:30:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:30:07,381 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:09,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:30:11,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:30:13,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:30:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:15,603 INFO L93 Difference]: Finished difference Result 140 states and 181 transitions. [2023-03-31 00:30:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:30:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 00:30:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:15,605 INFO L225 Difference]: With dead ends: 140 [2023-03-31 00:30:15,605 INFO L226 Difference]: Without dead ends: 132 [2023-03-31 00:30:15,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:30:15,606 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:15,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 126 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 120 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2023-03-31 00:30:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-03-31 00:30:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2023-03-31 00:30:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 89 states have internal predecessors, (109), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 00:30:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2023-03-31 00:30:15,641 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 18 [2023-03-31 00:30:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:15,641 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2023-03-31 00:30:15,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2023-03-31 00:30:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 00:30:15,643 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:15,643 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] [2023-03-31 00:30:15,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:15,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:15,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2023-03-31 00:30:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:15,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209649348] [2023-03-31 00:30:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:15,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:15,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254083654] [2023-03-31 00:30:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:15,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:15,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:30:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:15,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:30:15,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:15,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:15,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209649348] [2023-03-31 00:30:15,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254083654] [2023-03-31 00:30:15,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254083654] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:15,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:15,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:30:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991882233] [2023-03-31 00:30:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:30:15,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:30:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:30:15,961 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:15,986 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2023-03-31 00:30:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:30:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 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 24 [2023-03-31 00:30:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:15,989 INFO L225 Difference]: With dead ends: 140 [2023-03-31 00:30:15,989 INFO L226 Difference]: Without dead ends: 79 [2023-03-31 00:30:15,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:30:15,994 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:15,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-31 00:30:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-03-31 00:30:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 64 states have internal predecessors, (79), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:30:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-03-31 00:30:16,018 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 24 [2023-03-31 00:30:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:16,018 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-03-31 00:30:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-03-31 00:30:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:30:16,020 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:16,020 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:16,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:16,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 00:30:16,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:16,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:16,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1554339292, now seen corresponding path program 1 times [2023-03-31 00:30:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:16,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946960624] [2023-03-31 00:30:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:16,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378319887] [2023-03-31 00:30:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:16,246 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:16,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:30:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:16,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 00:30:16,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:16,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:16,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:16,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946960624] [2023-03-31 00:30:16,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:16,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378319887] [2023-03-31 00:30:16,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378319887] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:16,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 00:30:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906357381] [2023-03-31 00:30:16,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:30:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:30:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:30:16,453 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:30:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:16,623 INFO L93 Difference]: Finished difference Result 156 states and 195 transitions. [2023-03-31 00:30:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 00:30:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (4), 4 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 26 [2023-03-31 00:30:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:16,625 INFO L225 Difference]: With dead ends: 156 [2023-03-31 00:30:16,625 INFO L226 Difference]: Without dead ends: 142 [2023-03-31 00:30:16,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:30:16,626 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:16,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 172 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:30:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-03-31 00:30:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2023-03-31 00:30:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.263157894736842) internal successors, (96), 78 states have internal predecessors, (96), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:30:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2023-03-31 00:30:16,640 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 26 [2023-03-31 00:30:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:16,640 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2023-03-31 00:30:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:30:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2023-03-31 00:30:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 00:30:16,641 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:16,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:16,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:16,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:16,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash 557788470, now seen corresponding path program 2 times [2023-03-31 00:30:16,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:16,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201718715] [2023-03-31 00:30:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:16,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:16,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705152053] [2023-03-31 00:30:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:30:16,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:16,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:16,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:30:16,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-03-31 00:30:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:30:16,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 00:30:16,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-31 00:30:17,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:17,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:17,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201718715] [2023-03-31 00:30:17,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:17,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705152053] [2023-03-31 00:30:17,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705152053] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:17,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:17,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:30:17,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616727506] [2023-03-31 00:30:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:17,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:30:17,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:30:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:30:17,029 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:17,420 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2023-03-31 00:30:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:30:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-03-31 00:30:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:17,421 INFO L225 Difference]: With dead ends: 131 [2023-03-31 00:30:17,422 INFO L226 Difference]: Without dead ends: 126 [2023-03-31 00:30:17,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:30:17,422 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:17,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 00:30:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-03-31 00:30:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2023-03-31 00:30:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 89 states have internal predecessors, (109), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:30:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2023-03-31 00:30:17,443 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 27 [2023-03-31 00:30:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:17,443 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2023-03-31 00:30:17,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2023-03-31 00:30:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 00:30:17,447 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:17,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:17,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 00:30:17,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:17,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1082249335, now seen corresponding path program 1 times [2023-03-31 00:30:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974887835] [2023-03-31 00:30:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:17,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957766500] [2023-03-31 00:30:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:17,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 00:30:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:17,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 00:30:17,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:17,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:20,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:20,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974887835] [2023-03-31 00:30:20,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:20,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957766500] [2023-03-31 00:30:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957766500] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:30:20,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:30:20,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 00:30:20,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832860828] [2023-03-31 00:30:20,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:20,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:30:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:30:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2023-03-31 00:30:20,239 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:21,464 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2023-03-31 00:30:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:30:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 2 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 30 [2023-03-31 00:30:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:21,465 INFO L225 Difference]: With dead ends: 185 [2023-03-31 00:30:21,465 INFO L226 Difference]: Without dead ends: 132 [2023-03-31 00:30:21,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=68, Invalid=237, Unknown=1, NotChecked=0, Total=306 [2023-03-31 00:30:21,467 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 170 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 00:30:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-03-31 00:30:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-03-31 00:30:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 108 states have internal predecessors, (127), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 00:30:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2023-03-31 00:30:21,491 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 30 [2023-03-31 00:30:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:21,492 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2023-03-31 00:30:21,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2023-03-31 00:30:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 00:30:21,498 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:21,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:21,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 00:30:21,704 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:21,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2030398442, now seen corresponding path program 2 times [2023-03-31 00:30:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970731681] [2023-03-31 00:30:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:21,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079213014] [2023-03-31 00:30:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:30:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:21,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:21,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 00:30:21,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:30:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:30:21,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 00:30:21,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:22,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:24,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:24,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970731681] [2023-03-31 00:30:24,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:24,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079213014] [2023-03-31 00:30:24,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079213014] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:30:24,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:30:24,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 00:30:24,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4437956] [2023-03-31 00:30:24,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:24,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:30:24,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:30:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2023-03-31 00:30:24,532 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:25,948 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2023-03-31 00:30:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:30:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (4), 2 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 33 [2023-03-31 00:30:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:25,950 INFO L225 Difference]: With dead ends: 168 [2023-03-31 00:30:25,950 INFO L226 Difference]: Without dead ends: 165 [2023-03-31 00:30:25,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2023-03-31 00:30:25,951 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:25,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 245 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 00:30:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-03-31 00:30:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2023-03-31 00:30:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 108 states have internal predecessors, (127), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 00:30:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2023-03-31 00:30:25,966 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 33 [2023-03-31 00:30:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:25,966 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2023-03-31 00:30:25,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2023-03-31 00:30:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:30:25,967 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:25,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:25,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 00:30:26,168 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:26,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1417698711, now seen corresponding path program 3 times [2023-03-31 00:30:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:26,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327461606] [2023-03-31 00:30:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:26,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:26,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548277389] [2023-03-31 00:30:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:30:26,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:26,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:26,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:26,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 00:30:34,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 00:30:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:30:34,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-31 00:30:34,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:30:34,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:30:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327461606] [2023-03-31 00:30:35,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548277389] [2023-03-31 00:30:35,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548277389] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:35,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-03-31 00:30:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871607579] [2023-03-31 00:30:35,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 00:30:35,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 00:30:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:30:35,086 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:30:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:35,381 INFO L93 Difference]: Finished difference Result 159 states and 187 transitions. [2023-03-31 00:30:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 00:30:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2023-03-31 00:30:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:35,382 INFO L225 Difference]: With dead ends: 159 [2023-03-31 00:30:35,382 INFO L226 Difference]: Without dead ends: 117 [2023-03-31 00:30:35,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:30:35,383 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:35,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:30:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-03-31 00:30:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2023-03-31 00:30:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.197674418604651) internal successors, (103), 87 states have internal predecessors, (103), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:30:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2023-03-31 00:30:35,399 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 36 [2023-03-31 00:30:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:35,399 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2023-03-31 00:30:35,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:30:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2023-03-31 00:30:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:30:35,400 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:35,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:35,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:35,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 00:30:35,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:35,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1716777427, now seen corresponding path program 1 times [2023-03-31 00:30:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:35,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330785314] [2023-03-31 00:30:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:35,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:35,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435886523] [2023-03-31 00:30:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:35,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:35,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:35,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 00:30:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:35,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:30:35,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:35,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330785314] [2023-03-31 00:30:35,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435886523] [2023-03-31 00:30:35,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435886523] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:35,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:35,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-03-31 00:30:35,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901730252] [2023-03-31 00:30:35,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:30:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:30:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:30:35,863 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 00:30:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:36,020 INFO L93 Difference]: Finished difference Result 279 states and 315 transitions. [2023-03-31 00:30:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 00:30:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2023-03-31 00:30:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:36,023 INFO L225 Difference]: With dead ends: 279 [2023-03-31 00:30:36,023 INFO L226 Difference]: Without dead ends: 272 [2023-03-31 00:30:36,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:30:36,024 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 87 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:36,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 178 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:30:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-03-31 00:30:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 249. [2023-03-31 00:30:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 194 states have (on average 1.190721649484536) internal successors, (231), 199 states have internal predecessors, (231), 30 states have call successors, (30), 25 states have call predecessors, (30), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-31 00:30:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 285 transitions. [2023-03-31 00:30:36,051 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 285 transitions. Word has length 36 [2023-03-31 00:30:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:36,053 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 285 transitions. [2023-03-31 00:30:36,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 00:30:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 285 transitions. [2023-03-31 00:30:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:30:36,054 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:36,054 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:36,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:36,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:36,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:36,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1718564887, now seen corresponding path program 4 times [2023-03-31 00:30:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:36,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356197107] [2023-03-31 00:30:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:36,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:36,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:36,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511552095] [2023-03-31 00:30:36,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:30:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:36,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:36,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-31 00:30:36,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:30:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:30:36,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2023-03-31 00:30:36,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:36,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:39,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356197107] [2023-03-31 00:30:39,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511552095] [2023-03-31 00:30:39,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511552095] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:30:39,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:30:39,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-03-31 00:30:39,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932756920] [2023-03-31 00:30:39,248 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 00:30:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 00:30:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2023-03-31 00:30:39,249 INFO L87 Difference]: Start difference. First operand 249 states and 285 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:40,135 INFO L93 Difference]: Finished difference Result 336 states and 388 transitions. [2023-03-31 00:30:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 00:30:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 2 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 36 [2023-03-31 00:30:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:40,138 INFO L225 Difference]: With dead ends: 336 [2023-03-31 00:30:40,138 INFO L226 Difference]: Without dead ends: 274 [2023-03-31 00:30:40,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=92, Invalid=369, Unknown=1, NotChecked=0, Total=462 [2023-03-31 00:30:40,139 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:40,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 281 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 00:30:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-03-31 00:30:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 258. [2023-03-31 00:30:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 201 states have (on average 1.1791044776119404) internal successors, (237), 206 states have internal predecessors, (237), 31 states have call successors, (31), 26 states have call predecessors, (31), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-03-31 00:30:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 293 transitions. [2023-03-31 00:30:40,163 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 293 transitions. Word has length 36 [2023-03-31 00:30:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:40,163 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 293 transitions. [2023-03-31 00:30:40,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 293 transitions. [2023-03-31 00:30:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 00:30:40,164 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:40,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:40,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:40,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 00:30:40,370 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:40,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash 454667766, now seen corresponding path program 5 times [2023-03-31 00:30:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:40,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600216371] [2023-03-31 00:30:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:40,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:40,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027248528] [2023-03-31 00:30:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:30:40,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:40,398 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:30:40,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-31 00:30:40,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-03-31 00:30:40,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:30:40,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-31 00:30:40,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:30:41,377 INFO L327 TraceCheckSpWp]: Computing backward predicates...