/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-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:10:06,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:10:06,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:10:06,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:10:06,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:10:06,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:10:06,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:10:06,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:10:06,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:10:06,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:10:06,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:10:06,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:10:06,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:10:06,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:10:06,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:10:06,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:10:06,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:10:06,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:10:06,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:10:06,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:10:06,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:10:06,748 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:10:06,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:10:06,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:10:06,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:10:06,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:10:06,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:10:06,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:10:06,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:10:06,750 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:10:06,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:10:06,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:10:06,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:10:06,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:10:06,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:10:06,753 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:10:06,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:10:06,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:10:06,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:10:06,985 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:10:06,985 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:10:06,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg1.i [2023-04-01 19:10:08,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:10:08,312 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:10:08,312 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i [2023-04-01 19:10:08,316 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aef25896b/fbdb590286604307963df3d7fcefd640/FLAG41379ff5a [2023-04-01 19:10:08,326 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aef25896b/fbdb590286604307963df3d7fcefd640 [2023-04-01 19:10:08,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:10:08,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:10:08,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:10:08,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:10:08,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:10:08,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63085f7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08, skipping insertion in model container [2023-04-01 19:10:08,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:10:08,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:10:08,466 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-crafted/mapavg1.i[1306,1319] [2023-04-01 19:10:08,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:10:08,483 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:10:08,502 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-crafted/mapavg1.i[1306,1319] [2023-04-01 19:10:08,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:10:08,514 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:10:08,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08 WrapperNode [2023-04-01 19:10:08,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:10:08,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:10:08,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:10:08,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:10:08,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,546 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:10:08,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:10:08,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:10:08,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:10:08,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (1/1) ... [2023-04-01 19:10:08,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:10:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:08,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:10:08,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:10:08,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:10:08,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:10:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:10:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2023-04-01 19:10:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:10:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:10:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:10:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:10:08,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:10:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:10:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:10:08,711 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:10:08,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:10:08,909 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:10:08,917 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:10:08,917 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:10:08,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:10:08 BoogieIcfgContainer [2023-04-01 19:10:08,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:10:08,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:10:08,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:10:08,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:10:08,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:10:08" (1/3) ... [2023-04-01 19:10:08,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d79c845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:10:08, skipping insertion in model container [2023-04-01 19:10:08,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:10:08" (2/3) ... [2023-04-01 19:10:08,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d79c845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:10:08, skipping insertion in model container [2023-04-01 19:10:08,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:10:08" (3/3) ... [2023-04-01 19:10:08,948 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2023-04-01 19:10:08,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:10:08,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:10:08,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:10:09,010 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;@1eab44a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:10:09,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:10:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:10:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:10:09,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:09,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:09,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:09,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1373981706, now seen corresponding path program 1 times [2023-04-01 19:10:09,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:09,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602916811] [2023-04-01 19:10:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:09,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:10:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:10:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:10:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:10:09,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602916811] [2023-04-01 19:10:09,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602916811] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:10:09,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:10:09,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:10:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329354783] [2023-04-01 19:10:09,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:10:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:10:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:10:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:10:09,271 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:09,334 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-04-01 19:10:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:10:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:10:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:09,340 INFO L225 Difference]: With dead ends: 54 [2023-04-01 19:10:09,341 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 19:10:09,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:10:09,347 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:09,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:10:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 19:10:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 19:10:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-01 19:10:09,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2023-04-01 19:10:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:09,387 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-01 19:10:09,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-01 19:10:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:10:09,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:09,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:09,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:10:09,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:09,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:09,390 INFO L85 PathProgramCache]: Analyzing trace with hash -508796304, now seen corresponding path program 1 times [2023-04-01 19:10:09,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:09,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083099254] [2023-04-01 19:10:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:10:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:10:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:10:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:10:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083099254] [2023-04-01 19:10:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083099254] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733276772] [2023-04-01 19:10:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:09,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:09,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:09,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:10:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:09,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:10:09,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:10:09,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:10:09,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733276772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:10:09,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:10:09,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:10:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911376118] [2023-04-01 19:10:09,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:10:09,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:10:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:10:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:10:09,764 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:09,776 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-04-01 19:10:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:10:09,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:10:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:09,777 INFO L225 Difference]: With dead ends: 46 [2023-04-01 19:10:09,777 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 19:10:09,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:10:09,778 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:09,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:10:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 19:10:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-04-01 19:10:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 19:10:09,785 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2023-04-01 19:10:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:09,785 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 19:10:09,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 19:10:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:10:09,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:09,786 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 19:10:09,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:10:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:09,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:09,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922642, now seen corresponding path program 1 times [2023-04-01 19:10:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686761403] [2023-04-01 19:10:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:10:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 19:10:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:10:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:10:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686761403] [2023-04-01 19:10:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686761403] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923344111] [2023-04-01 19:10:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:10,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:10,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:10,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:10:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:10:10,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:10:10,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:10:10,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923344111] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:10:10,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:10:10,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 19:10:10,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999124668] [2023-04-01 19:10:10,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:10:10,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:10:10,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:10:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:10:10,206 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:10,222 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-04-01 19:10:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:10:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-01 19:10:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:10,224 INFO L225 Difference]: With dead ends: 46 [2023-04-01 19:10:10,225 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 19:10:10,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:10:10,227 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:10,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:10:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 19:10:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-01 19:10:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 19:10:10,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2023-04-01 19:10:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:10,235 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 19:10:10,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 19:10:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 19:10:10,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:10,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 19:10:10,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 19:10:10,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 19:10:10,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:10,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash -587035376, now seen corresponding path program 1 times [2023-04-01 19:10:10,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:10,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361343478] [2023-04-01 19:10:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:10,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:10:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 19:10:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 19:10:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 19:10:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361343478] [2023-04-01 19:10:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361343478] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:10,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684453875] [2023-04-01 19:10:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:10,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:10,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:10,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:10:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:10:10,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 19:10:10,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:10:10,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684453875] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:10:10,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:10:10,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:10:10,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051569979] [2023-04-01 19:10:10,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:10:10,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:10:10,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:10,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:10:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:10:10,619 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:10,626 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-01 19:10:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:10:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-04-01 19:10:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:10,627 INFO L225 Difference]: With dead ends: 43 [2023-04-01 19:10:10,627 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 19:10:10,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:10:10,628 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:10,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:10:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 19:10:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-04-01 19:10:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 19:10:10,632 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2023-04-01 19:10:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:10,633 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 19:10:10,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:10:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 19:10:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 19:10:10,634 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:10,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 19:10:10,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 19:10:10,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:10,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:10,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2137181582, now seen corresponding path program 1 times [2023-04-01 19:10:10,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:10,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128842217] [2023-04-01 19:10:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:10,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:10:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 19:10:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 19:10:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 19:10:10,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128842217] [2023-04-01 19:10:10,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128842217] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:10,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496279416] [2023-04-01 19:10:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:10,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:10,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:10,910 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:10,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:10:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:10,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:10:10,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 19:10:11,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 19:10:11,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496279416] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:11,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:11,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:10:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996365547] [2023-04-01 19:10:11,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:11,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:10:11,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:10:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:10:11,055 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:11,164 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-04-01 19:10:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:10:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 19:10:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:11,167 INFO L225 Difference]: With dead ends: 55 [2023-04-01 19:10:11,167 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 19:10:11,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:10:11,169 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:11,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 19:10:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 19:10:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 19:10:11,186 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2023-04-01 19:10:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:11,187 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 19:10:11,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 19:10:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:10:11,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:11,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2023-04-01 19:10:11,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:10:11,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:11,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:11,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:11,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2032446644, now seen corresponding path program 2 times [2023-04-01 19:10:11,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:11,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136715945] [2023-04-01 19:10:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:11,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:11,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:11,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:10:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:11,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 19:10:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:11,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 19:10:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 19:10:11,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136715945] [2023-04-01 19:10:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136715945] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314579859] [2023-04-01 19:10:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:10:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:11,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:11,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:10:11,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:10:11,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:11,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:10:11,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 19:10:11,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 19:10:11,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314579859] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:11,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:11,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 19:10:11,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981102419] [2023-04-01 19:10:11,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:11,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 19:10:11,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 19:10:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:10:11,709 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:10:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:11,892 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2023-04-01 19:10:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:10:11,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-04-01 19:10:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:11,893 INFO L225 Difference]: With dead ends: 70 [2023-04-01 19:10:11,893 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 19:10:11,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-04-01 19:10:11,894 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:11,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 22 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 19:10:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-04-01 19:10:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-04-01 19:10:11,909 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2023-04-01 19:10:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:11,909 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-04-01 19:10:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:10:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-04-01 19:10:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 19:10:11,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:11,910 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 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] [2023-04-01 19:10:11,931 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 19:10:12,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:12,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:12,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2143850302, now seen corresponding path program 3 times [2023-04-01 19:10:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448517205] [2023-04-01 19:10:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:10:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 19:10:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:10:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-04-01 19:10:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448517205] [2023-04-01 19:10:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448517205] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004904548] [2023-04-01 19:10:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:10:12,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:12,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:12,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:10:12,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:10:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:12,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:10:12,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-04-01 19:10:12,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-04-01 19:10:12,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004904548] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:12,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:12,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:10:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504786050] [2023-04-01 19:10:12,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:12,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:10:12,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:12,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:10:12,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:10:12,307 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:10:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:12,395 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2023-04-01 19:10:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:10:12,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-04-01 19:10:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:12,397 INFO L225 Difference]: With dead ends: 70 [2023-04-01 19:10:12,397 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 19:10:12,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:10:12,398 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:12,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 19:10:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-01 19:10:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-04-01 19:10:12,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2023-04-01 19:10:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:12,404 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-04-01 19:10:12,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:10:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-04-01 19:10:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 19:10:12,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:12,405 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:12,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 19:10:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:12,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:12,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1006772296, now seen corresponding path program 4 times [2023-04-01 19:10:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875356809] [2023-04-01 19:10:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:10:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 19:10:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 19:10:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 19:10:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:12,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875356809] [2023-04-01 19:10:12,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875356809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:12,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777369556] [2023-04-01 19:10:12,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:10:12,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:12,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:12,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:12,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:10:12,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:10:12,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:12,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:10:12,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-04-01 19:10:12,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-04-01 19:10:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777369556] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:12,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:12,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-04-01 19:10:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104704247] [2023-04-01 19:10:12,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:12,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 19:10:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 19:10:12,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-04-01 19:10:12,984 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:13,266 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2023-04-01 19:10:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 19:10:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2023-04-01 19:10:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:13,267 INFO L225 Difference]: With dead ends: 94 [2023-04-01 19:10:13,267 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 19:10:13,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 19:10:13,268 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:13,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 19:10:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-04-01 19:10:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-04-01 19:10:13,274 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2023-04-01 19:10:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:13,274 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-04-01 19:10:13,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-04-01 19:10:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 19:10:13,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:13,275 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:13,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 19:10:13,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:13,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:13,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2134927634, now seen corresponding path program 5 times [2023-04-01 19:10:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:13,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722075303] [2023-04-01 19:10:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:13,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:13,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:13,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 19:10:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-04-01 19:10:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:13,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-04-01 19:10:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-01 19:10:13,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:13,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722075303] [2023-04-01 19:10:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722075303] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654922604] [2023-04-01 19:10:13,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:10:13,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:13,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:13,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:10:14,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-04-01 19:10:14,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:14,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:10:14,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-04-01 19:10:14,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-01 19:10:14,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654922604] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:14,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-04-01 19:10:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799924450] [2023-04-01 19:10:14,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 19:10:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 19:10:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-04-01 19:10:14,672 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:15,131 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2023-04-01 19:10:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 19:10:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2023-04-01 19:10:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:15,132 INFO L225 Difference]: With dead ends: 120 [2023-04-01 19:10:15,132 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 19:10:15,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 19:10:15,135 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:15,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 37 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 19:10:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-04-01 19:10:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-04-01 19:10:15,151 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2023-04-01 19:10:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:15,152 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-04-01 19:10:15,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-04-01 19:10:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 19:10:15,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:15,153 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:15,161 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 19:10:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 19:10:15,360 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:15,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash -970031644, now seen corresponding path program 6 times [2023-04-01 19:10:15,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:15,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466551211] [2023-04-01 19:10:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:15,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:15,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:15,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 19:10:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:15,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-04-01 19:10:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:15,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-04-01 19:10:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2023-04-01 19:10:15,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:15,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466551211] [2023-04-01 19:10:15,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466551211] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:15,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631768647] [2023-04-01 19:10:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:10:15,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:15,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:15,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:10:15,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-04-01 19:10:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:15,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:10:15,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2023-04-01 19:10:16,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2023-04-01 19:10:16,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631768647] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:16,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:16,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2023-04-01 19:10:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125102580] [2023-04-01 19:10:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:16,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:10:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:10:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:10:16,116 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:16,454 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-04-01 19:10:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 19:10:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2023-04-01 19:10:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:16,455 INFO L225 Difference]: With dead ends: 150 [2023-04-01 19:10:16,455 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 19:10:16,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 19:10:16,458 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:16,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 42 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 19:10:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-04-01 19:10:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2023-04-01 19:10:16,472 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2023-04-01 19:10:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:16,473 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2023-04-01 19:10:16,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2023-04-01 19:10:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 19:10:16,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:16,475 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:16,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 19:10:16,680 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,SelfDestructingSolverStorable9 [2023-04-01 19:10:16,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:16,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash -479633478, now seen corresponding path program 7 times [2023-04-01 19:10:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868170858] [2023-04-01 19:10:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:10:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:17,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-04-01 19:10:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:17,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:10:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:17,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:17,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868170858] [2023-04-01 19:10:17,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868170858] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:17,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832252966] [2023-04-01 19:10:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:10:17,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:17,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:17,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:10:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:17,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 19:10:17,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:17,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:17,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832252966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:17,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:17,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2023-04-01 19:10:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164775352] [2023-04-01 19:10:17,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 19:10:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 19:10:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2023-04-01 19:10:17,484 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:17,951 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2023-04-01 19:10:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 19:10:17,951 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2023-04-01 19:10:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:17,953 INFO L225 Difference]: With dead ends: 191 [2023-04-01 19:10:17,953 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 19:10:17,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 19:10:17,955 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:17,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 42 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 19:10:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 19:10:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-04-01 19:10:17,981 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2023-04-01 19:10:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:17,981 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-04-01 19:10:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-04-01 19:10:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 19:10:17,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:17,983 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:17,990 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 19:10:18,188 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,SelfDestructingSolverStorable10 [2023-04-01 19:10:18,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:18,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 912239736, now seen corresponding path program 8 times [2023-04-01 19:10:18,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:18,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68138075] [2023-04-01 19:10:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:19,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 19:10:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-04-01 19:10:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-04-01 19:10:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68138075] [2023-04-01 19:10:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68138075] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734720030] [2023-04-01 19:10:19,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:10:19,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:19,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:19,032 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 19:10:19,083 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 19:10:19,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:10:19,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:19,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 19:10:19,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:19,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:20,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734720030] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:20,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:20,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2023-04-01 19:10:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306110773] [2023-04-01 19:10:20,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:20,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-04-01 19:10:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-04-01 19:10:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 19:10:20,188 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:21,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:21,541 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2023-04-01 19:10:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-04-01 19:10:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 192 [2023-04-01 19:10:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:21,544 INFO L225 Difference]: With dead ends: 251 [2023-04-01 19:10:21,544 INFO L226 Difference]: Without dead ends: 187 [2023-04-01 19:10:21,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 19:10:21,561 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:21,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 27 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:10:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-04-01 19:10:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-04-01 19:10:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2023-04-01 19:10:21,568 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 192 [2023-04-01 19:10:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:21,568 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2023-04-01 19:10:21,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2023-04-01 19:10:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-01 19:10:21,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:21,570 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:21,589 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 19:10:21,775 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,SelfDestructingSolverStorable11 [2023-04-01 19:10:21,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:21,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash -201915276, now seen corresponding path program 9 times [2023-04-01 19:10:21,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:21,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684832378] [2023-04-01 19:10:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:23,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:23,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-04-01 19:10:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:23,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-04-01 19:10:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:23,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2023-04-01 19:10:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-04-01 19:10:23,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:23,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684832378] [2023-04-01 19:10:23,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684832378] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:23,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083285259] [2023-04-01 19:10:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:10:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:23,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:23,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:10:24,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-01 19:10:24,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:24,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:10:24,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 4377 trivial. 0 not checked. [2023-04-01 19:10:25,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5227 trivial. 0 not checked. [2023-04-01 19:10:25,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083285259] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:25,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:25,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2023-04-01 19:10:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136937331] [2023-04-01 19:10:25,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-04-01 19:10:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-04-01 19:10:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2023-04-01 19:10:25,448 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:27,411 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2023-04-01 19:10:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-04-01 19:10:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 252 [2023-04-01 19:10:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:27,413 INFO L225 Difference]: With dead ends: 278 [2023-04-01 19:10:27,413 INFO L226 Difference]: Without dead ends: 214 [2023-04-01 19:10:27,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2023-04-01 19:10:27,418 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 186 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:27,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 57 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:10:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-04-01 19:10:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2023-04-01 19:10:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2023-04-01 19:10:27,425 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 252 [2023-04-01 19:10:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:27,425 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2023-04-01 19:10:27,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2023-04-01 19:10:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-04-01 19:10:27,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:27,427 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:27,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 19:10:27,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:10:27,634 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:27,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1806409662, now seen corresponding path program 10 times [2023-04-01 19:10:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670469089] [2023-04-01 19:10:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:29,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:29,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 19:10:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:29,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-04-01 19:10:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2023-04-01 19:10:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2023-04-01 19:10:29,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:29,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670469089] [2023-04-01 19:10:29,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670469089] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321320444] [2023-04-01 19:10:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:10:29,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:29,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:29,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:29,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:10:30,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:10:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:10:30,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 19:10:30,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:10:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2023-04-01 19:10:30,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:10:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2023-04-01 19:10:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321320444] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:10:31,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:10:31,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2023-04-01 19:10:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851669875] [2023-04-01 19:10:31,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:10:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-04-01 19:10:31,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:10:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-04-01 19:10:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2023-04-01 19:10:31,015 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:10:33,436 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2023-04-01 19:10:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-04-01 19:10:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 278 [2023-04-01 19:10:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:10:33,438 INFO L225 Difference]: With dead ends: 336 [2023-04-01 19:10:33,438 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 19:10:33,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2023-04-01 19:10:33,442 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:10:33,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 62 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:10:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 19:10:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2023-04-01 19:10:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:10:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2023-04-01 19:10:33,450 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 278 [2023-04-01 19:10:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:10:33,450 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2023-04-01 19:10:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:10:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2023-04-01 19:10:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-04-01 19:10:33,453 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:10:33,453 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:10:33,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 19:10:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 19:10:33,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:10:33,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:10:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1821998976, now seen corresponding path program 11 times [2023-04-01 19:10:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:10:33,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444435377] [2023-04-01 19:10:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:10:33,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:10:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:10:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-04-01 19:10:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2023-04-01 19:10:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:35,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 19:10:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:10:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12379 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2023-04-01 19:10:35,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:10:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444435377] [2023-04-01 19:10:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444435377] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:10:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947397558] [2023-04-01 19:10:35,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:10:35,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:10:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:10:35,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:10:35,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process