/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:22:22,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:22:22,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:22:22,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:22:22,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:22:22,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:22:22,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:22:22,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:22:22,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:22:22,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:22:22,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:22:22,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:22:22,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:22:22,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:22:22,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:22:22,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:22:22,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:22:22,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:22:22,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:22:22,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:22:22,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:22:22,299 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:22:22,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:22:22,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:22:22,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:22:22,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:22:22,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:22:22,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:22:22,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:22:22,302 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:22:22,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:22:22,303 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:22:22,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:22:22,304 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:22:22,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:22:22,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:22:22,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:22:22,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:22:22,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:22:22,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:22:22,305 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:22:22,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:22:22,306 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:22:22,306 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:22:22,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:22:22,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:22:22,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:22:22,553 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:22:22,553 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:22:22,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2023-04-01 19:22:23,754 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:22:23,917 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:22:23,917 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2023-04-01 19:22:23,921 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89625e8e3/4d67357ed1354a8d84b765f16fda445d/FLAGbc5a9a2bf [2023-04-01 19:22:23,931 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89625e8e3/4d67357ed1354a8d84b765f16fda445d [2023-04-01 19:22:23,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:22:23,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:22:23,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:22:23,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:22:23,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:22:23,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:22:23" (1/1) ... [2023-04-01 19:22:23,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119fd04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:23, skipping insertion in model container [2023-04-01 19:22:23,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:22:23" (1/1) ... [2023-04-01 19:22:23,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:22:23,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:22:24,104 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2023-04-01 19:22:24,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:22:24,123 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:22:24,132 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2023-04-01 19:22:24,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:22:24,150 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:22:24,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24 WrapperNode [2023-04-01 19:22:24,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:22:24,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:22:24,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:22:24,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:22:24,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,173 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:22:24,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:22:24,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:22:24,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:22:24,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (1/1) ... [2023-04-01 19:22:24,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:22:24,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:24,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:22:24,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:22:24,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:22:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:22:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:22:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:22:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:22:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:22:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:22:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:22:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:22:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:22:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:22:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:22:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:22:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:22:24,303 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:22:24,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:22:24,444 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:22:24,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:22:24,449 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 19:22:24,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:22:24 BoogieIcfgContainer [2023-04-01 19:22:24,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:22:24,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:22:24,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:22:24,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:22:24,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:22:23" (1/3) ... [2023-04-01 19:22:24,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d6c1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:22:24, skipping insertion in model container [2023-04-01 19:22:24,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:22:24" (2/3) ... [2023-04-01 19:22:24,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d6c1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:22:24, skipping insertion in model container [2023-04-01 19:22:24,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:22:24" (3/3) ... [2023-04-01 19:22:24,457 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2023-04-01 19:22:24,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:22:24,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:22:24,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:22:24,553 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;@1f8c5e1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:22:24,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:22:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:22:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 19:22:24,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:24,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:24,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:24,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash 518090807, now seen corresponding path program 1 times [2023-04-01 19:22:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:24,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937708568] [2023-04-01 19:22:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:24,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:24,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021225577] [2023-04-01 19:22:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:24,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:24,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:24,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:24,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:22:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:22:24,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 19:22:24,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:22:24,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:22:24,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:24,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937708568] [2023-04-01 19:22:24,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021225577] [2023-04-01 19:22:24,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021225577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:22:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:22:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 19:22:24,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588425754] [2023-04-01 19:22:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:22:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 19:22:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 19:22:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 19:22:24,867 INFO L87 Difference]: Start difference. First operand has 37 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:24,896 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2023-04-01 19:22:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 19:22:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-04-01 19:22:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:24,903 INFO L225 Difference]: With dead ends: 67 [2023-04-01 19:22:24,904 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 19:22:24,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 19:22:24,912 INFO L413 NwaCegarLoop]: 43 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, 43 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 [2023-04-01 19:22:24,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:22:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 19:22:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 19:22:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-04-01 19:22:24,952 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2023-04-01 19:22:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:24,952 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-04-01 19:22:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-04-01 19:22:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 19:22:24,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:24,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:24,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:25,155 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 [2023-04-01 19:22:25,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:25,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2112997111, now seen corresponding path program 1 times [2023-04-01 19:22:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:25,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363979699] [2023-04-01 19:22:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:25,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:25,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:25,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849448585] [2023-04-01 19:22:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:25,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:25,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:25,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:25,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:22:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:22:25,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:22:25,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:22:25,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:22:25,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:25,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363979699] [2023-04-01 19:22:25,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:25,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849448585] [2023-04-01 19:22:25,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849448585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:22:25,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:22:25,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:22:25,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513076792] [2023-04-01 19:22:25,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:22:25,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:22:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:22:25,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:25,376 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:25,446 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2023-04-01 19:22:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:22:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-04-01 19:22:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:25,449 INFO L225 Difference]: With dead ends: 60 [2023-04-01 19:22:25,449 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 19:22:25,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:25,451 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:25,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:22:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 19:22:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2023-04-01 19:22:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) 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, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-04-01 19:22:25,464 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 27 [2023-04-01 19:22:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:25,464 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-04-01 19:22:25,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-04-01 19:22:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 19:22:25,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:25,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:25,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:25,669 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 [2023-04-01 19:22:25,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:25,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1192638999, now seen corresponding path program 1 times [2023-04-01 19:22:25,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:25,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716771634] [2023-04-01 19:22:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:25,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:25,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665434340] [2023-04-01 19:22:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:25,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:25,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:25,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:25,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:22:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:22:25,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:22:25,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:22:25,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:22:25,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716771634] [2023-04-01 19:22:25,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665434340] [2023-04-01 19:22:25,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665434340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:22:25,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:22:25,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:22:25,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110217258] [2023-04-01 19:22:25,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:22:25,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:22:25,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:25,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:22:25,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:25,806 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:25,868 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-01 19:22:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:22:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-04-01 19:22:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:25,873 INFO L225 Difference]: With dead ends: 62 [2023-04-01 19:22:25,873 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 19:22:25,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:25,876 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:25,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:22:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 19:22:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2023-04-01 19:22:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-04-01 19:22:25,890 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 30 [2023-04-01 19:22:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:25,892 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-04-01 19:22:25,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-04-01 19:22:25,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 19:22:25,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:25,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:25,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 19:22:26,099 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 [2023-04-01 19:22:26,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:26,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:26,101 INFO L85 PathProgramCache]: Analyzing trace with hash -94831130, now seen corresponding path program 1 times [2023-04-01 19:22:26,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:26,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922902904] [2023-04-01 19:22:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:26,122 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:26,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144728908] [2023-04-01 19:22:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:26,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:26,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:26,125 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:26,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:22:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:22:26,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:22:26,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:22:26,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:22:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:22:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922902904] [2023-04-01 19:22:26,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144728908] [2023-04-01 19:22:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144728908] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:22:26,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:22:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 19:22:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127021493] [2023-04-01 19:22:26,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:22:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:22:26,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:22:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:22:26,289 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:26,422 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2023-04-01 19:22:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:22:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2023-04-01 19:22:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:26,427 INFO L225 Difference]: With dead ends: 93 [2023-04-01 19:22:26,429 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 19:22:26,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-04-01 19:22:26,438 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 96 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:26,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 109 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:22:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 19:22:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 37. [2023-04-01 19:22:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-04-01 19:22:26,446 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2023-04-01 19:22:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:26,447 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-04-01 19:22:26,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-04-01 19:22:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:22:26,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:26,448 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:26,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:26,648 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 [2023-04-01 19:22:26,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:26,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 922115369, now seen corresponding path program 2 times [2023-04-01 19:22:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:26,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409183411] [2023-04-01 19:22:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:26,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216064799] [2023-04-01 19:22:26,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:22:26,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:26,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:26,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:22:26,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-01 19:22:26,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:22:26,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:22:26,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:22:26,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:22:26,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:26,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409183411] [2023-04-01 19:22:26,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:26,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216064799] [2023-04-01 19:22:26,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216064799] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:22:26,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:22:26,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:22:26,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037462138] [2023-04-01 19:22:26,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:22:26,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:22:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:26,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:22:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:26,772 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:26,809 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-04-01 19:22:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:22:26,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-04-01 19:22:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:26,810 INFO L225 Difference]: With dead ends: 63 [2023-04-01 19:22:26,810 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 19:22:26,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:26,811 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:26,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:22:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 19:22:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2023-04-01 19:22:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-04-01 19:22:26,820 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 34 [2023-04-01 19:22:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:26,820 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-04-01 19:22:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-04-01 19:22:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 19:22:26,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:26,821 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:26,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 19:22:27,033 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 [2023-04-01 19:22:27,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:27,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1725978549, now seen corresponding path program 1 times [2023-04-01 19:22:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114186905] [2023-04-01 19:22:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:27,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:27,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049221712] [2023-04-01 19:22:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:27,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:27,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:27,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:22:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:22:27,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 19:22:27,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:22:27,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:22:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:22:27,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114186905] [2023-04-01 19:22:27,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049221712] [2023-04-01 19:22:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049221712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:22:27,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:22:27,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 19:22:27,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733634972] [2023-04-01 19:22:27,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:22:27,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 19:22:27,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 19:22:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-04-01 19:22:27,295 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:27,606 INFO L93 Difference]: Finished difference Result 158 states and 215 transitions. [2023-04-01 19:22:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 19:22:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2023-04-01 19:22:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:27,609 INFO L225 Difference]: With dead ends: 158 [2023-04-01 19:22:27,609 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 19:22:27,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-04-01 19:22:27,611 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 256 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:27,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 127 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:22:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 19:22:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 44. [2023-04-01 19:22:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-04-01 19:22:27,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2023-04-01 19:22:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:27,630 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-04-01 19:22:27,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-04-01 19:22:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 19:22:27,639 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:27,639 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:27,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:27,844 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 [2023-04-01 19:22:27,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:27,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1215391083, now seen corresponding path program 2 times [2023-04-01 19:22:27,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:27,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527605770] [2023-04-01 19:22:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:27,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:27,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:27,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212586944] [2023-04-01 19:22:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:22:27,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:27,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:27,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:22:27,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:22:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:22:27,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:22:27,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 19:22:28,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:22:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527605770] [2023-04-01 19:22:28,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212586944] [2023-04-01 19:22:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212586944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:22:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:22:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:22:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854462645] [2023-04-01 19:22:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:22:28,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:22:28,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:22:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:28,030 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:28,064 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-04-01 19:22:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:22:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-04-01 19:22:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:28,065 INFO L225 Difference]: With dead ends: 64 [2023-04-01 19:22:28,066 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 19:22:28,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:22:28,067 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:28,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:22:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 19:22:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-04-01 19:22:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-04-01 19:22:28,090 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 43 [2023-04-01 19:22:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:28,091 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-04-01 19:22:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:22:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-04-01 19:22:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 19:22:28,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:28,093 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:28,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:28,299 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 [2023-04-01 19:22:28,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:28,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1122522808, now seen corresponding path program 1 times [2023-04-01 19:22:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:28,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537984623] [2023-04-01 19:22:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:28,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:28,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622378044] [2023-04-01 19:22:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:28,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:28,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:28,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:22:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:22:28,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 19:22:28,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:22:28,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:22:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:22:28,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:28,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537984623] [2023-04-01 19:22:28,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:28,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622378044] [2023-04-01 19:22:28,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622378044] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:22:28,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:22:28,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 19:22:28,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746383255] [2023-04-01 19:22:28,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:22:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:22:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:22:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:22:28,762 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:29,497 INFO L93 Difference]: Finished difference Result 282 states and 390 transitions. [2023-04-01 19:22:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:22:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-04-01 19:22:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:29,499 INFO L225 Difference]: With dead ends: 282 [2023-04-01 19:22:29,499 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 19:22:29,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 19:22:29,501 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 786 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:29,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 129 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:22:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 19:22:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 58. [2023-04-01 19:22:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2023-04-01 19:22:29,522 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 44 [2023-04-01 19:22:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:29,522 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2023-04-01 19:22:29,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2023-04-01 19:22:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 19:22:29,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:29,523 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:29,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:29,729 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 [2023-04-01 19:22:29,729 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:29,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1767887752, now seen corresponding path program 2 times [2023-04-01 19:22:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:29,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268710594] [2023-04-01 19:22:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:29,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:29,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26856241] [2023-04-01 19:22:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:22:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:29,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:22:29,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:22:29,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:22:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:22:29,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 19:22:29,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 1 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:22:30,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:22:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 1 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:22:30,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:30,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268710594] [2023-04-01 19:22:30,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:30,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26856241] [2023-04-01 19:22:30,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26856241] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:22:30,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:22:30,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 19:22:30,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169362841] [2023-04-01 19:22:30,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:22:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 19:22:30,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 19:22:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 19:22:30,849 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:32,944 INFO L93 Difference]: Finished difference Result 534 states and 750 transitions. [2023-04-01 19:22:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 19:22:32,945 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2023-04-01 19:22:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:32,950 INFO L225 Difference]: With dead ends: 534 [2023-04-01 19:22:32,950 INFO L226 Difference]: Without dead ends: 490 [2023-04-01 19:22:32,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 19:22:32,953 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1234 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:32,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 250 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 19:22:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-04-01 19:22:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 82. [2023-04-01 19:22:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-04-01 19:22:32,983 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 56 [2023-04-01 19:22:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:32,984 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-04-01 19:22:32,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-04-01 19:22:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 19:22:32,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:32,985 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:32,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:33,192 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 [2023-04-01 19:22:33,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:33,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1450706952, now seen corresponding path program 3 times [2023-04-01 19:22:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:33,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461742178] [2023-04-01 19:22:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:33,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288849333] [2023-04-01 19:22:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:22:33,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:33,231 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) [2023-04-01 19:22:33,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:22:33,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 19:22:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:22:33,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:22:33,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2023-04-01 19:22:33,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:22:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2023-04-01 19:22:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461742178] [2023-04-01 19:22:33,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288849333] [2023-04-01 19:22:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288849333] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:22:33,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:22:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 19:22:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629175818] [2023-04-01 19:22:33,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:22:33,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:22:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:22:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:22:33,578 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:33,720 INFO L93 Difference]: Finished difference Result 290 states and 320 transitions. [2023-04-01 19:22:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:22:33,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 80 [2023-04-01 19:22:33,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:33,721 INFO L225 Difference]: With dead ends: 290 [2023-04-01 19:22:33,722 INFO L226 Difference]: Without dead ends: 271 [2023-04-01 19:22:33,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-04-01 19:22:33,722 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 95 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:33,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 102 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:22:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-04-01 19:22:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 229. [2023-04-01 19:22:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 220 states have (on average 1.040909090909091) internal successors, (229), 220 states have internal predecessors, (229), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:22:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 238 transitions. [2023-04-01 19:22:33,784 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 238 transitions. Word has length 80 [2023-04-01 19:22:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:33,784 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 238 transitions. [2023-04-01 19:22:33,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:22:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 238 transitions. [2023-04-01 19:22:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-04-01 19:22:33,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:33,790 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:33,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:33,995 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 [2023-04-01 19:22:33,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:33,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1338482906, now seen corresponding path program 4 times [2023-04-01 19:22:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211611587] [2023-04-01 19:22:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:34,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:34,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728457660] [2023-04-01 19:22:34,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:22:34,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:34,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:34,082 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) [2023-04-01 19:22:34,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:22:34,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:22:34,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:22:34,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 19:22:34,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:22:34,782 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-01 19:22:34,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 19:22:34,853 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 19:22:34,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 19:22:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6636 proven. 6639 refuted. 0 times theorem prover too weak. 4325 trivial. 0 not checked. [2023-04-01 19:22:34,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:22:35,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:22:35,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 113 [2023-04-01 19:22:35,095 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-04-01 19:22:35,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-04-01 19:22:35,111 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 19:22:35,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 20 [2023-04-01 19:22:35,123 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-04-01 19:22:35,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-04-01 19:22:35,137 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 19:22:35,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 35 [2023-04-01 19:22:35,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-04-01 19:22:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17598 trivial. 0 not checked. [2023-04-01 19:22:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:22:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211611587] [2023-04-01 19:22:35,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:22:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728457660] [2023-04-01 19:22:35,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728457660] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:22:35,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:22:35,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 26 [2023-04-01 19:22:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117144062] [2023-04-01 19:22:35,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:22:35,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:22:35,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:22:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:22:35,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:22:35,282 INFO L87 Difference]: Start difference. First operand 229 states and 238 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:22:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:22:36,124 INFO L93 Difference]: Finished difference Result 301 states and 332 transitions. [2023-04-01 19:22:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:22:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 227 [2023-04-01 19:22:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:22:36,126 INFO L225 Difference]: With dead ends: 301 [2023-04-01 19:22:36,126 INFO L226 Difference]: Without dead ends: 299 [2023-04-01 19:22:36,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:22:36,127 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:22:36,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 536 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 19:22:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-04-01 19:22:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 241. [2023-04-01 19:22:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 230 states have (on average 1.0478260869565217) internal successors, (241), 231 states have internal predecessors, (241), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:22:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 252 transitions. [2023-04-01 19:22:36,182 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 252 transitions. Word has length 227 [2023-04-01 19:22:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:22:36,183 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 252 transitions. [2023-04-01 19:22:36,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:22:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 252 transitions. [2023-04-01 19:22:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-01 19:22:36,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:22:36,185 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:22:36,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:22:36,390 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 [2023-04-01 19:22:36,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:22:36,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:22:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash -738159523, now seen corresponding path program 5 times [2023-04-01 19:22:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:22:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160781196] [2023-04-01 19:22:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:22:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:22:36,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:22:36,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787152739] [2023-04-01 19:22:36,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:22:36,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:22:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:22:36,493 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) [2023-04-01 19:22:36,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process