/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-tiling/nr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:55:39,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:55:39,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:55:39,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:55:39,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:55:39,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:55:39,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:55:39,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:55:39,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:55:39,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:55:39,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:55:39,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:55:39,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:55:39,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:55:39,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:55:39,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:55:40,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:55:40,009 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 18:55:40,031 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:55:40,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:55:40,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:55:40,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:55:40,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:55:40,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:55:40,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:55:40,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:55:40,033 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:55:40,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:55:40,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:55:40,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:40,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:55:40,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:55:40,036 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:55:40,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:55:40,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:55:40,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:55:40,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:55:40,242 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:55:40,243 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:55:40,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr3.c [2023-04-01 18:55:41,133 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:55:41,327 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:55:41,327 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr3.c [2023-04-01 18:55:41,331 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3db078559/b1b83fa7a674460f82b8473377ed1f3f/FLAGcbd65e076 [2023-04-01 18:55:41,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3db078559/b1b83fa7a674460f82b8473377ed1f3f [2023-04-01 18:55:41,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:55:41,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:55:41,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:41,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:55:41,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:55:41,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573710b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41, skipping insertion in model container [2023-04-01 18:55:41,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:55:41,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:55:41,868 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-tiling/nr3.c[394,407] [2023-04-01 18:55:41,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:55:41,894 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:55:41,903 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-tiling/nr3.c[394,407] [2023-04-01 18:55:41,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:55:41,928 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:55:41,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41 WrapperNode [2023-04-01 18:55:41,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:41,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:55:41,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:55:41,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:55:41,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:55:41,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:55:41,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:55:41,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:55:41,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (1/1) ... [2023-04-01 18:55:41,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:41,978 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 18:55:41,983 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 18:55:42,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:55:42,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:55:42,008 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:55:42,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:55:42,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:55:42,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:55:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:55:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:55:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:55:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:55:42,069 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:55:42,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:55:42,259 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:55:42,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:55:42,264 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:55:42,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:55:42 BoogieIcfgContainer [2023-04-01 18:55:42,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:55:42,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:55:42,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:55:42,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:55:42,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:55:41" (1/3) ... [2023-04-01 18:55:42,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561c2302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:55:42, skipping insertion in model container [2023-04-01 18:55:42,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:41" (2/3) ... [2023-04-01 18:55:42,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561c2302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:55:42, skipping insertion in model container [2023-04-01 18:55:42,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:55:42" (3/3) ... [2023-04-01 18:55:42,273 INFO L112 eAbstractionObserver]: Analyzing ICFG nr3.c [2023-04-01 18:55:42,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:55:42,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:55:42,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:55:42,336 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;@168be0b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:55:42,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:55:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:55:42,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:42,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:42,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:42,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash 208371713, now seen corresponding path program 1 times [2023-04-01 18:55:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340275869] [2023-04-01 18:55:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:42,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:42,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:42,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:42,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340275869] [2023-04-01 18:55:42,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340275869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:42,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:42,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:55:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659534585] [2023-04-01 18:55:42,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:55:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:55:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:55:42,623 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:42,712 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-04-01 18:55:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:55:42,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:55:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:42,718 INFO L225 Difference]: With dead ends: 63 [2023-04-01 18:55:42,718 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:55:42,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:55:42,722 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:42,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:55:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:55:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:55:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 18:55:42,750 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2023-04-01 18:55:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:42,751 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 18:55:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 18:55:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:55:42,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:42,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:55:42,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:42,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -963394890, now seen corresponding path program 1 times [2023-04-01 18:55:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463736397] [2023-04-01 18:55:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:42,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:42,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:42,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463736397] [2023-04-01 18:55:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463736397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:42,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:42,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:55:42,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754435765] [2023-04-01 18:55:42,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:42,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:55:42,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:55:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:55:42,917 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:43,009 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-04-01 18:55:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:55:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:55:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:43,010 INFO L225 Difference]: With dead ends: 39 [2023-04-01 18:55:43,010 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 18:55:43,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:55:43,011 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:43,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 18:55:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-04-01 18:55:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-04-01 18:55:43,017 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2023-04-01 18:55:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:43,017 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-04-01 18:55:43,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-04-01 18:55:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:55:43,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:43,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:43,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:55:43,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:43,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash -961547848, now seen corresponding path program 1 times [2023-04-01 18:55:43,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:43,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948542287] [2023-04-01 18:55:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:43,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:43,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948542287] [2023-04-01 18:55:43,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948542287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:43,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:43,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:55:43,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383206115] [2023-04-01 18:55:43,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:43,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:55:43,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:55:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:55:43,163 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:43,221 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-04-01 18:55:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:55:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 18:55:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:43,223 INFO L225 Difference]: With dead ends: 58 [2023-04-01 18:55:43,223 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 18:55:43,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:55:43,224 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:43,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:55:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 18:55:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-04-01 18:55:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-04-01 18:55:43,231 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2023-04-01 18:55:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:43,231 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-04-01 18:55:43,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-04-01 18:55:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 18:55:43,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:43,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:43,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:55:43,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:43,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1506939926, now seen corresponding path program 1 times [2023-04-01 18:55:43,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479287496] [2023-04-01 18:55:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:43,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479287496] [2023-04-01 18:55:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479287496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:43,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:43,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:55:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534000692] [2023-04-01 18:55:43,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:55:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:55:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:55:43,273 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:43,311 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-04-01 18:55:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:55:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 18:55:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:43,312 INFO L225 Difference]: With dead ends: 62 [2023-04-01 18:55:43,312 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:55:43,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:55:43,313 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:43,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:55:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:55:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-04-01 18:55:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-04-01 18:55:43,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2023-04-01 18:55:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:43,320 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-04-01 18:55:43,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-04-01 18:55:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 18:55:43,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:43,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:43,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:55:43,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:43,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1007761327, now seen corresponding path program 1 times [2023-04-01 18:55:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:43,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104990561] [2023-04-01 18:55:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:43,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:43,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104990561] [2023-04-01 18:55:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104990561] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655950643] [2023-04-01 18:55:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:43,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:43,373 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 18:55:43,374 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 18:55:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:55:43,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:43,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:43,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655950643] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:43,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:43,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2023-04-01 18:55:43,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320095683] [2023-04-01 18:55:43,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:43,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 18:55:43,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 18:55:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:55:43,508 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:43,574 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-04-01 18:55:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 18:55:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 18:55:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:43,575 INFO L225 Difference]: With dead ends: 67 [2023-04-01 18:55:43,575 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 18:55:43,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:55:43,576 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:43,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 18:55:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-01 18:55:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-04-01 18:55:43,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 28 [2023-04-01 18:55:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:43,583 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-04-01 18:55:43,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-04-01 18:55:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 18:55:43,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:43,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 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 18:55:43,591 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 18:55:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:43,790 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:43,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1642741199, now seen corresponding path program 2 times [2023-04-01 18:55:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120994055] [2023-04-01 18:55:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:43,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120994055] [2023-04-01 18:55:43,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120994055] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:43,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744106332] [2023-04-01 18:55:43,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:55:43,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:43,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:43,921 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 18:55:43,928 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 18:55:43,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:55:43,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:55:43,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 18:55:43,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:44,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:55:44,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744106332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:44,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:55:44,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-04-01 18:55:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106869692] [2023-04-01 18:55:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:44,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:55:44,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:55:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-01 18:55:44,044 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:44,083 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-04-01 18:55:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 18:55:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-04-01 18:55:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:44,086 INFO L225 Difference]: With dead ends: 73 [2023-04-01 18:55:44,086 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 18:55:44,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-01 18:55:44,091 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:44,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:55:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 18:55:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-01 18:55:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:55:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-04-01 18:55:44,104 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 34 [2023-04-01 18:55:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:44,105 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-04-01 18:55:44,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-04-01 18:55:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 18:55:44,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:44,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:44,112 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 18:55:44,312 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,SelfDestructingSolverStorable5 [2023-04-01 18:55:44,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:44,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1384575761, now seen corresponding path program 1 times [2023-04-01 18:55:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964385538] [2023-04-01 18:55:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:44,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:44,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964385538] [2023-04-01 18:55:44,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964385538] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:44,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113683247] [2023-04-01 18:55:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:44,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:44,889 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 18:55:44,891 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 18:55:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:44,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 18:55:44,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:45,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:55:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:55:45,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:55:45,231 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 18:55:45,231 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 23 treesize of output 26 [2023-04-01 18:55:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:45,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:45,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 55 treesize of output 51 [2023-04-01 18:55:45,715 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 251 treesize of output 243 [2023-04-01 18:55:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:55:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113683247] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:45,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:45,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 44 [2023-04-01 18:55:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422206566] [2023-04-01 18:55:45,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:45,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 18:55:45,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 18:55:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1674, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 18:55:45,951 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 44 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 38 states have internal predecessors, (74), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:56:23,392 WARN L223 SmtUtils]: Spent 36.93s on a formula simplification. DAG size of input: 50 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 18:56:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:24,973 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2023-04-01 18:56:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 18:56:24,974 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 38 states have internal predecessors, (74), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-04-01 18:56:24,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:24,975 INFO L225 Difference]: With dead ends: 160 [2023-04-01 18:56:24,975 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 18:56:24,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=1005, Invalid=5315, Unknown=0, NotChecked=0, Total=6320 [2023-04-01 18:56:24,978 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 429 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:24,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 214 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 18:56:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 18:56:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 61. [2023-04-01 18:56:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.196078431372549) internal successors, (61), 52 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:56:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-04-01 18:56:25,002 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 34 [2023-04-01 18:56:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:25,003 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-04-01 18:56:25,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 38 states have internal predecessors, (74), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:56:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-04-01 18:56:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 18:56:25,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:25,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:25,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:25,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:25,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1081168112, now seen corresponding path program 1 times [2023-04-01 18:56:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286068256] [2023-04-01 18:56:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:25,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:25,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 18:56:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:56:25,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286068256] [2023-04-01 18:56:25,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286068256] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742732769] [2023-04-01 18:56:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:25,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:25,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:25,596 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 18:56:25,598 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 18:56:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:25,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 18:56:25,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:25,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:25,774 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 18:56:25,774 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 23 treesize of output 26 [2023-04-01 18:56:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:56:26,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:26,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 35 [2023-04-01 18:56:26,505 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 55 treesize of output 47 [2023-04-01 18:56:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:56:26,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742732769] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:26,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:26,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 42 [2023-04-01 18:56:26,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624996654] [2023-04-01 18:56:26,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 18:56:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 18:56:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 18:56:26,628 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:56:29,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:31,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:33,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:35,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:43,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:45,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:51,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:53,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:55,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:57,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:59,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:01,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:03,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:05,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 18:57:07,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:57:09,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:57:11,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:13,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:15,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:17,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:19,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:21,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:23,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:25,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:34,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:36,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:44,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:46,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:48,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:50,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:52,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:58,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 18:57:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:58,428 INFO L93 Difference]: Finished difference Result 194 states and 233 transitions. [2023-04-01 18:57:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 18:57:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2023-04-01 18:57:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:58,430 INFO L225 Difference]: With dead ends: 194 [2023-04-01 18:57:58,431 INFO L226 Difference]: Without dead ends: 153 [2023-04-01 18:57:58,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=653, Invalid=4446, Unknown=13, NotChecked=0, Total=5112 [2023-04-01 18:57:58,435 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 71 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:58,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 304 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 895 Invalid, 32 Unknown, 0 Unchecked, 64.7s Time] [2023-04-01 18:57:58,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-04-01 18:57:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2023-04-01 18:57:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.18) internal successors, (118), 106 states have internal predecessors, (118), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 7 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:57:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2023-04-01 18:57:58,470 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 43 [2023-04-01 18:57:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:58,470 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2023-04-01 18:57:58,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:57:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2023-04-01 18:57:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 18:57:58,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:58,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:58,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 18:57:58,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:58,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:58,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash -87097841, now seen corresponding path program 2 times [2023-04-01 18:57:58,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:58,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058666975] [2023-04-01 18:57:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:58,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:59,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:59,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 18:57:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:59,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 18:57:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:57:59,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058666975] [2023-04-01 18:57:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058666975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329794791] [2023-04-01 18:57:59,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:57:59,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:59,018 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 18:57:59,020 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 18:57:59,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:57:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:59,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 18:57:59,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:59,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:58:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:58:07,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:09,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 17 [2023-04-01 18:58:09,476 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 24 treesize of output 20 [2023-04-01 18:58:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:58:09,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329794791] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:09,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:09,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 33 [2023-04-01 18:58:09,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67251374] [2023-04-01 18:58:09,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:09,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 18:58:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:09,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 18:58:09,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=920, Unknown=3, NotChecked=0, Total=1056 [2023-04-01 18:58:09,611 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 33 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:58:11,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:12,749 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2023-04-01 18:58:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 18:58:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 52 [2023-04-01 18:58:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:12,750 INFO L225 Difference]: With dead ends: 188 [2023-04-01 18:58:12,750 INFO L226 Difference]: Without dead ends: 186 [2023-04-01 18:58:12,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=502, Invalid=3655, Unknown=3, NotChecked=0, Total=4160 [2023-04-01 18:58:12,752 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:12,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 213 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 822 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 18:58:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-04-01 18:58:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 135. [2023-04-01 18:58:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 114 states have internal predecessors, (126), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 18:58:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2023-04-01 18:58:12,775 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 52 [2023-04-01 18:58:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:12,776 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2023-04-01 18:58:12,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:58:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2023-04-01 18:58:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 18:58:12,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:12,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:12,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:12,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:12,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:12,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:12,981 INFO L85 PathProgramCache]: Analyzing trace with hash -815225904, now seen corresponding path program 3 times [2023-04-01 18:58:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980007833] [2023-04-01 18:58:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:12,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 18:58:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:13,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 18:58:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:13,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-04-01 18:58:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:58:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:13,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980007833] [2023-04-01 18:58:13,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980007833] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:13,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240603798] [2023-04-01 18:58:13,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:58:13,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:13,244 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 18:58:13,246 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 18:58:13,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 18:58:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:13,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 18:58:13,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:58:13,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:58:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240603798] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:13,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2023-04-01 18:58:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606539821] [2023-04-01 18:58:13,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:13,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 18:58:13,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 18:58:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2023-04-01 18:58:13,841 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:58:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:14,167 INFO L93 Difference]: Finished difference Result 192 states and 223 transitions. [2023-04-01 18:58:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 18:58:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 61 [2023-04-01 18:58:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:14,168 INFO L225 Difference]: With dead ends: 192 [2023-04-01 18:58:14,168 INFO L226 Difference]: Without dead ends: 150 [2023-04-01 18:58:14,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 18:58:14,169 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:14,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 106 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:58:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-01 18:58:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2023-04-01 18:58:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 100 states have (on average 1.18) internal successors, (118), 107 states have internal predecessors, (118), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 7 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 18:58:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2023-04-01 18:58:14,188 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 61 [2023-04-01 18:58:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:14,188 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2023-04-01 18:58:14,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:58:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2023-04-01 18:58:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 18:58:14,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:14,189 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:14,195 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 18:58:14,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:14,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:14,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1493573882, now seen corresponding path program 4 times [2023-04-01 18:58:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:14,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830251869] [2023-04-01 18:58:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:14,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:14,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:14,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:14,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 18:58:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 18:58:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:58:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830251869] [2023-04-01 18:58:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830251869] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533622269] [2023-04-01 18:58:14,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:58:14,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:14,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:14,956 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 18:58:14,958 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 18:58:15,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:58:15,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:15,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 18:58:15,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:15,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:58:15,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 18:58:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:58:15,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 18:58:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:58:15,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 18:58:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:58:15,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:16,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 17 [2023-04-01 18:58:16,094 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 24 treesize of output 20 [2023-04-01 18:58:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:16,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533622269] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:16,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:16,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 50 [2023-04-01 18:58:16,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898896736] [2023-04-01 18:58:16,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:16,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:58:16,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:58:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2183, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:58:16,205 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand has 50 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:58:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:17,334 INFO L93 Difference]: Finished difference Result 300 states and 359 transitions. [2023-04-01 18:58:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 18:58:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 64 [2023-04-01 18:58:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:17,336 INFO L225 Difference]: With dead ends: 300 [2023-04-01 18:58:17,336 INFO L226 Difference]: Without dead ends: 195 [2023-04-01 18:58:17,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 106 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=582, Invalid=4248, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 18:58:17,338 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:17,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 298 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 18:58:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-04-01 18:58:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 83. [2023-04-01 18:58:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 69 states have internal predecessors, (74), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:58:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2023-04-01 18:58:17,371 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 64 [2023-04-01 18:58:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:17,371 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2023-04-01 18:58:17,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:58:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2023-04-01 18:58:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 18:58:17,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:17,372 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:17,377 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 18:58:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:17,575 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:17,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash 676718777, now seen corresponding path program 5 times [2023-04-01 18:58:17,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559158654] [2023-04-01 18:58:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:18,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 18:58:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:18,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 18:58:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-04-01 18:58:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:58:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559158654] [2023-04-01 18:58:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559158654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994561596] [2023-04-01 18:58:18,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:58:18,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:18,211 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 18:58:18,240 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 18:58:18,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-01 18:58:18,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:18,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:58:18,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:18,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:18,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:58:18,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:58:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 18:58:18,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:58:18,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-04-01 18:58:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:58:18,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:31,245 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~j~0_52 Int)) (or (< c_main_~j~0 (+ v_main_~j~0_52 1)) (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (v_main_~j~0_51 Int)) (or (< v_main_~j~0_52 (+ v_main_~j~0_51 1)) (< c_main_~MINVAL~0 (+ (select (let ((.cse0 (* c_main_~i~0 12))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 (* v_main_~j~0_52 (- 4)) |c_main_~#volArray~0.offset|) v_ArrVal_175) (+ .cse0 |c_main_~#volArray~0.offset| (* v_main_~j~0_51 (- 4))) v_ArrVal_178)) (+ 12 |c_main_~#volArray~0.offset|)) 1)))))) is different from false [2023-04-01 18:58:31,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 39 [2023-04-01 18:58:31,258 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 358 treesize of output 350 [2023-04-01 18:58:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 24 trivial. 5 not checked. [2023-04-01 18:58:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994561596] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:31,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 47 [2023-04-01 18:58:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981208327] [2023-04-01 18:58:31,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:31,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-01 18:58:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-01 18:58:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1832, Unknown=6, NotChecked=88, Total=2162 [2023-04-01 18:58:31,472 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 45 states have internal predecessors, (131), 15 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:58:33,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:35,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:47,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:49,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:51,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:53,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:55,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:57,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:59,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:02,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:02,829 INFO L93 Difference]: Finished difference Result 312 states and 378 transitions. [2023-04-01 18:59:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 18:59:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 45 states have internal predecessors, (131), 15 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 73 [2023-04-01 18:59:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:02,831 INFO L225 Difference]: With dead ends: 312 [2023-04-01 18:59:02,831 INFO L226 Difference]: Without dead ends: 256 [2023-04-01 18:59:02,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=975, Invalid=6855, Unknown=6, NotChecked=174, Total=8010 [2023-04-01 18:59:02,833 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 300 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 130 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:02,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 545 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1783 Invalid, 16 Unknown, 210 Unchecked, 25.5s Time] [2023-04-01 18:59:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-04-01 18:59:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 192. [2023-04-01 18:59:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 165 states have internal predecessors, (182), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (24), 12 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 18:59:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 231 transitions. [2023-04-01 18:59:02,873 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 231 transitions. Word has length 73 [2023-04-01 18:59:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:02,874 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 231 transitions. [2023-04-01 18:59:02,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 45 states have internal predecessors, (131), 15 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:59:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 231 transitions. [2023-04-01 18:59:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 18:59:02,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:02,875 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 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] [2023-04-01 18:59:02,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 18:59:03,075 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,SelfDestructingSolverStorable11 [2023-04-01 18:59:03,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:03,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -758245274, now seen corresponding path program 6 times [2023-04-01 18:59:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:03,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446949385] [2023-04-01 18:59:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 18:59:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 18:59:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-04-01 18:59:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 18:59:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 66 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 18:59:03,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:03,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446949385] [2023-04-01 18:59:03,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446949385] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:03,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533692309] [2023-04-01 18:59:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:59:03,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:03,707 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 18:59:03,709 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 18:59:03,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-04-01 18:59:03,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:03,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 18:59:03,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:03,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:59:03,992 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 18:59:03,992 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 23 treesize of output 26 [2023-04-01 18:59:04,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-04-01 18:59:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 18:59:04,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:06,703 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~j~0 Int)) (or (< 1 main_~j~0) (forall ((v_ArrVal_210 Int)) (< c_main_~MINVAL~0 (+ (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* c_main_~i~0 12) (* main_~j~0 (- 4)) |c_main_~#volArray~0.offset|) v_ArrVal_210) (+ 16 |c_main_~#volArray~0.offset|)) 1))))) is different from false [2023-04-01 18:59:06,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 29 [2023-04-01 18:59:06,724 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 174 treesize of output 166 [2023-04-01 18:59:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 36 trivial. 17 not checked. [2023-04-01 18:59:06,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533692309] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:06,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:06,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 49 [2023-04-01 18:59:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530014389] [2023-04-01 18:59:06,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:06,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 18:59:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 18:59:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1984, Unknown=1, NotChecked=92, Total=2352 [2023-04-01 18:59:06,892 INFO L87 Difference]: Start difference. First operand 192 states and 231 transitions. Second operand has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 48 states have internal predecessors, (143), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 18:59:09,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:11,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:13,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:15,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:17,632 INFO L93 Difference]: Finished difference Result 404 states and 494 transitions. [2023-04-01 18:59:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-04-01 18:59:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 48 states have internal predecessors, (143), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 82 [2023-04-01 18:59:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:17,634 INFO L225 Difference]: With dead ends: 404 [2023-04-01 18:59:17,634 INFO L226 Difference]: Without dead ends: 244 [2023-04-01 18:59:17,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3222 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1423, Invalid=8680, Unknown=1, NotChecked=198, Total=10302 [2023-04-01 18:59:17,636 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 210 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:17,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 423 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1981 Invalid, 4 Unknown, 189 Unchecked, 9.0s Time] [2023-04-01 18:59:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-04-01 18:59:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 168. [2023-04-01 18:59:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 135 states have (on average 1.125925925925926) internal successors, (152), 142 states have internal predecessors, (152), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 12 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 18:59:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 191 transitions. [2023-04-01 18:59:17,668 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 191 transitions. Word has length 82 [2023-04-01 18:59:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:17,668 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 191 transitions. [2023-04-01 18:59:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 48 states have internal predecessors, (143), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 18:59:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 191 transitions. [2023-04-01 18:59:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 18:59:17,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:17,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:17,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 18:59:17,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 18:59:17,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:17,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash 287095575, now seen corresponding path program 7 times [2023-04-01 18:59:17,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:17,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495708477] [2023-04-01 18:59:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 18:59:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 18:59:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-04-01 18:59:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 18:59:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 18:59:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 11 proven. 114 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 18:59:18,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:18,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495708477] [2023-04-01 18:59:18,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495708477] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:18,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226620453] [2023-04-01 18:59:18,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:59:18,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:18,294 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 18:59:18,301 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 18:59:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:18,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 18:59:18,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:18,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-04-01 19:00:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 7 proven. 130 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:00:09,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:11,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 17 [2023-04-01 19:00:11,290 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 24 treesize of output 20 [2023-04-01 19:00:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:00:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226620453] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:11,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:11,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 21] total 42 [2023-04-01 19:00:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422815825] [2023-04-01 19:00:11,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:11,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 19:00:11,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 19:00:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1553, Unknown=6, NotChecked=0, Total=1722 [2023-04-01 19:00:11,452 INFO L87 Difference]: Start difference. First operand 168 states and 191 transitions. Second operand has 42 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 13 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 19:00:14,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:00:15,329 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2023-04-01 19:00:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-01 19:00:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 13 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 91 [2023-04-01 19:00:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:00:15,330 INFO L225 Difference]: With dead ends: 256 [2023-04-01 19:00:15,331 INFO L226 Difference]: Without dead ends: 254 [2023-04-01 19:00:15,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 14 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=516, Invalid=4734, Unknown=6, NotChecked=0, Total=5256 [2023-04-01 19:00:15,332 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 173 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 101 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:00:15,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 373 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1361 Invalid, 2 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 19:00:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-04-01 19:00:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2023-04-01 19:00:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 180 states have (on average 1.1222222222222222) internal successors, (202), 191 states have internal predecessors, (202), 30 states have call successors, (30), 19 states have call predecessors, (30), 18 states have return successors, (29), 18 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 19:00:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 261 transitions. [2023-04-01 19:00:15,375 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 261 transitions. Word has length 91 [2023-04-01 19:00:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:00:15,376 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 261 transitions. [2023-04-01 19:00:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 13 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 19:00:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 261 transitions. [2023-04-01 19:00:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 19:00:15,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:00:15,377 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:00:15,383 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 19:00:15,582 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,SelfDestructingSolverStorable13 [2023-04-01 19:00:15,583 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:00:15,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:00:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1519062984, now seen corresponding path program 8 times [2023-04-01 19:00:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:00:15,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276525899] [2023-04-01 19:00:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:00:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:00:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 19:00:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:00:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:00:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-04-01 19:00:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:00:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 19:00:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-04-01 19:00:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 79 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 19:00:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:00:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276525899] [2023-04-01 19:00:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276525899] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:00:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428970379] [2023-04-01 19:00:15,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:00:15,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:00:15,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:00:15,937 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 19:00:15,939 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 19:00:16,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:00:16,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:00:16,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 19:00:16,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:00:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 105 proven. 38 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 19:00:16,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 105 proven. 38 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 19:00:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428970379] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:16,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:16,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 41 [2023-04-01 19:00:16,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811714656] [2023-04-01 19:00:16,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:16,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:00:16,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:16,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:00:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1256, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:00:16,910 INFO L87 Difference]: Start difference. First operand 229 states and 261 transitions. Second operand has 41 states, 41 states have (on average 3.707317073170732) internal successors, (152), 40 states have internal predecessors, (152), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 19:00:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:00:17,417 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2023-04-01 19:00:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 19:00:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.707317073170732) internal successors, (152), 40 states have internal predecessors, (152), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 100 [2023-04-01 19:00:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:00:17,419 INFO L225 Difference]: With dead ends: 239 [2023-04-01 19:00:17,419 INFO L226 Difference]: Without dead ends: 168 [2023-04-01 19:00:17,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=583, Invalid=1967, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 19:00:17,420 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 177 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:00:17,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 167 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:00:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-01 19:00:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-04-01 19:00:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 142 states have internal predecessors, (151), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 12 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 19:00:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2023-04-01 19:00:17,451 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 100 [2023-04-01 19:00:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:00:17,451 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2023-04-01 19:00:17,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.707317073170732) internal successors, (152), 40 states have internal predecessors, (152), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 19:00:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2023-04-01 19:00:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 19:00:17,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:00:17,452 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:00:17,459 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 19:00:17,653 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,SelfDestructingSolverStorable14 [2023-04-01 19:00:17,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:00:17,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:00:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -221182647, now seen corresponding path program 9 times [2023-04-01 19:00:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:00:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633920054] [2023-04-01 19:00:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:00:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat