/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/float-benchs/zonotope_3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:42:52,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:42:52,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:42:52,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 00:42:52,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 00:42:52,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 00:42:52,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 00:42:52,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 00:42:52,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 00:42:52,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 00:42:52,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 00:42:52,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 00:42:52,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 00:42:52,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 00:42:52,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 00:42:52,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 00:42:52,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 00:42:52,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 00:42:52,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 00:42:52,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 00:42:52,508 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 [2023-04-02 00:42:52,530 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:42:52,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:42:52,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:42:52,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:42:52,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:42:52,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:42:52,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:42:52,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:42:52,532 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:42:52,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:42:52,532 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:42:52,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:42:52,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:42:52,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:42:52,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:42:52,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:42:52,534 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:42:52,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:42:52,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:42:52,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:42:52,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:42:52,742 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:42:52,743 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:42:52,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2023-04-02 00:42:53,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:42:54,054 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:42:54,054 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2023-04-02 00:42:54,079 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce15b2051/2cecbe044a6c46d7b39c35f6beab3298/FLAG6a164e0ce [2023-04-02 00:42:54,091 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce15b2051/2cecbe044a6c46d7b39c35f6beab3298 [2023-04-02 00:42:54,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:42:54,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:42:54,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:42:54,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:42:54,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:42:54,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c6ba05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54, skipping insertion in model container [2023-04-02 00:42:54,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:42:54,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:42:54,304 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/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2023-04-02 00:42:54,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:42:54,323 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:42:54,369 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/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2023-04-02 00:42:54,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:42:54,384 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:42:54,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54 WrapperNode [2023-04-02 00:42:54,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:42:54,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:42:54,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:42:54,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:42:54,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:42:54,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:42:54,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:42:54,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:42:54,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (1/1) ... [2023-04-02 00:42:54,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:42:54,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:42:54,469 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) [2023-04-02 00:42:54,470 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 [2023-04-02 00:42:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:42:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:42:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:42:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 00:42:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:42:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:42:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:42:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:42:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:42:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:42:54,606 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:42:54,619 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:42:54,982 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:42:54,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:42:54,987 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 00:42:54,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:42:54 BoogieIcfgContainer [2023-04-02 00:42:54,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:42:54,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:42:54,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:42:54,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:42:54,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:42:54" (1/3) ... [2023-04-02 00:42:54,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a1d5d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:42:54, skipping insertion in model container [2023-04-02 00:42:54,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:54" (2/3) ... [2023-04-02 00:42:54,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a1d5d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:42:54, skipping insertion in model container [2023-04-02 00:42:54,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:42:54" (3/3) ... [2023-04-02 00:42:54,994 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2023-04-02 00:42:55,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:42:55,007 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:42:55,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:42:55,051 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;@8e9136, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:42:55,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:42:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 53 states have (on average 1.830188679245283) internal successors, (97), 54 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:42:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 00:42:55,068 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:55,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:55,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:55,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1348301876, now seen corresponding path program 1 times [2023-04-02 00:42:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:55,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543603659] [2023-04-02 00:42:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:55,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:42:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:55,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:42:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543603659] [2023-04-02 00:42:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543603659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:42:55,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:42:55,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:42:55,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652583594] [2023-04-02 00:42:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:42:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 00:42:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:42:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 00:42:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:42:55,738 INFO L87 Difference]: Start difference. First operand has 59 states, 53 states have (on average 1.830188679245283) internal successors, (97), 54 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:42:56,004 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2023-04-02 00:42:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 00:42:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-02 00:42:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:42:56,012 INFO L225 Difference]: With dead ends: 73 [2023-04-02 00:42:56,012 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 00:42:56,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:42:56,017 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 93 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:42:56,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 313 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 00:42:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 00:42:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-02 00:42:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2023-04-02 00:42:56,048 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2023-04-02 00:42:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:42:56,048 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2023-04-02 00:42:56,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2023-04-02 00:42:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 00:42:56,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:56,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:56,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:42:56,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:56,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1333197839, now seen corresponding path program 1 times [2023-04-02 00:42:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:56,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612853818] [2023-04-02 00:42:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:56,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:56,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:42:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:56,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:42:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612853818] [2023-04-02 00:42:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612853818] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:42:56,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:42:56,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-02 00:42:56,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121595790] [2023-04-02 00:42:56,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:42:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 00:42:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:42:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 00:42:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-04-02 00:42:56,486 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:42:56,627 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-04-02 00:42:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 00:42:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-02 00:42:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:42:56,632 INFO L225 Difference]: With dead ends: 68 [2023-04-02 00:42:56,632 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 00:42:56,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-04-02 00:42:56,639 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:42:56,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 00:42:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 00:42:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-04-02 00:42:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-04-02 00:42:56,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 49 [2023-04-02 00:42:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:42:56,660 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-04-02 00:42:56,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-04-02 00:42:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 00:42:56,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:56,661 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:56,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:42:56,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:56,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash -212880527, now seen corresponding path program 1 times [2023-04-02 00:42:56,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:56,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137375582] [2023-04-02 00:42:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:56,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:42:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:56,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:42:56,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137375582] [2023-04-02 00:42:56,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137375582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:42:56,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:42:56,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:42:56,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196041916] [2023-04-02 00:42:56,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:42:56,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:42:56,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:42:56,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:42:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:42:56,870 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:42:56,967 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-04-02 00:42:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:42:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-02 00:42:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:42:56,970 INFO L225 Difference]: With dead ends: 71 [2023-04-02 00:42:56,971 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 00:42:56,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:42:56,976 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:42:56,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 00:42:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 00:42:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-02 00:42:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-04-02 00:42:56,989 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2023-04-02 00:42:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:42:56,990 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-04-02 00:42:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-04-02 00:42:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 00:42:56,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:56,994 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 00:42:56,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:56,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1625529526, now seen corresponding path program 1 times [2023-04-02 00:42:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203933476] [2023-04-02 00:42:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:42:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:57,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:42:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203933476] [2023-04-02 00:42:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203933476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:42:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273446844] [2023-04-02 00:42:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:57,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:42:57,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:42:57,337 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) [2023-04-02 00:42:57,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 00:42:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:57,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 00:42:57,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:42:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:57,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:42:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:57,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273446844] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:42:57,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:42:57,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-02 00:42:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498163059] [2023-04-02 00:42:57,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:42:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 00:42:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:42:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 00:42:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-02 00:42:57,889 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:42:58,077 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2023-04-02 00:42:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 00:42:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-02 00:42:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:42:58,080 INFO L225 Difference]: With dead ends: 123 [2023-04-02 00:42:58,080 INFO L226 Difference]: Without dead ends: 116 [2023-04-02 00:42:58,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-02 00:42:58,085 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 107 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:42:58,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 169 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 00:42:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-02 00:42:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-04-02 00:42:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-04-02 00:42:58,101 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 54 [2023-04-02 00:42:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:42:58,101 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-04-02 00:42:58,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:42:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-04-02 00:42:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 00:42:58,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:58,102 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:58,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 00:42:58,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:42:58,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:58,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1309853194, now seen corresponding path program 2 times [2023-04-02 00:42:58,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:58,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547159969] [2023-04-02 00:42:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:58,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:58,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:42:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:58,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:42:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547159969] [2023-04-02 00:42:58,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547159969] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:42:58,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661513546] [2023-04-02 00:42:58,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 00:42:58,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:42:58,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:42:58,962 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) [2023-04-02 00:42:58,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 00:42:59,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 00:42:59,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:42:59,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 00:42:59,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:42:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:59,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:43:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661513546] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:43:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:43:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-02 00:43:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879745739] [2023-04-02 00:43:00,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:43:00,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 00:43:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:43:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 00:43:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 00:43:00,022 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 50 states, 50 states have (on average 4.42) internal successors, (221), 49 states have internal predecessors, (221), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:43:00,248 INFO L93 Difference]: Finished difference Result 243 states and 268 transitions. [2023-04-02 00:43:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 00:43:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.42) internal successors, (221), 49 states have internal predecessors, (221), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2023-04-02 00:43:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:43:00,249 INFO L225 Difference]: With dead ends: 243 [2023-04-02 00:43:00,249 INFO L226 Difference]: Without dead ends: 236 [2023-04-02 00:43:00,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 00:43:00,251 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 76 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:43:00,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 277 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 00:43:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-04-02 00:43:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-04-02 00:43:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2023-04-02 00:43:00,262 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 114 [2023-04-02 00:43:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:43:00,263 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2023-04-02 00:43:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.42) internal successors, (221), 49 states have internal predecessors, (221), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2023-04-02 00:43:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-02 00:43:00,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:43:00,265 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:43:00,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 00:43:00,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:43:00,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:43:00,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:43:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash -212577162, now seen corresponding path program 3 times [2023-04-02 00:43:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:43:00,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249451852] [2023-04-02 00:43:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:43:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:43:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:43:02,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:43:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:43:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:02,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:43:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249451852] [2023-04-02 00:43:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249451852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:43:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318876836] [2023-04-02 00:43:02,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 00:43:02,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:43:02,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:43:02,327 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) [2023-04-02 00:43:02,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 00:43:02,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2023-04-02 00:43:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:43:02,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 00:43:02,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:43:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:03,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:43:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:05,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318876836] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:43:05,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:43:05,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2023-04-02 00:43:05,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256719440] [2023-04-02 00:43:05,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:43:05,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-02 00:43:05,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:43:05,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-02 00:43:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2023-04-02 00:43:05,453 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 98 states, 98 states have (on average 4.704081632653061) internal successors, (461), 97 states have internal predecessors, (461), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:43:05,979 INFO L93 Difference]: Finished difference Result 483 states and 532 transitions. [2023-04-02 00:43:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 00:43:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.704081632653061) internal successors, (461), 97 states have internal predecessors, (461), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2023-04-02 00:43:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:43:05,982 INFO L225 Difference]: With dead ends: 483 [2023-04-02 00:43:05,982 INFO L226 Difference]: Without dead ends: 476 [2023-04-02 00:43:05,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2023-04-02 00:43:05,986 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 81 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:43:05,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 419 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 00:43:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-04-02 00:43:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2023-04-02 00:43:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.0042372881355932) internal successors, (474), 472 states have internal predecessors, (474), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 477 transitions. [2023-04-02 00:43:06,002 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 477 transitions. Word has length 234 [2023-04-02 00:43:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:43:06,003 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 477 transitions. [2023-04-02 00:43:06,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.704081632653061) internal successors, (461), 97 states have internal predecessors, (461), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 477 transitions. [2023-04-02 00:43:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-04-02 00:43:06,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:43:06,013 INFO L195 NwaCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:43:06,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 00:43:06,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:43:06,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:43:06,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:43:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash 405932406, now seen corresponding path program 4 times [2023-04-02 00:43:06,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:43:06,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852870959] [2023-04-02 00:43:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:43:06,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:43:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:43:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:43:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:43:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:12,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:43:12,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852870959] [2023-04-02 00:43:12,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852870959] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:43:12,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551393061] [2023-04-02 00:43:12,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 00:43:12,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:43:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:43:12,496 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) [2023-04-02 00:43:12,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 00:43:13,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 00:43:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:43:13,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 4246 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 00:43:13,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:43:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:13,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:43:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:21,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551393061] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:43:21,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:43:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2023-04-02 00:43:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860696514] [2023-04-02 00:43:21,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:43:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-02 00:43:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:43:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-02 00:43:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2023-04-02 00:43:22,000 INFO L87 Difference]: Start difference. First operand 476 states and 477 transitions. Second operand has 194 states, 194 states have (on average 4.850515463917525) internal successors, (941), 193 states have internal predecessors, (941), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:43:23,921 INFO L93 Difference]: Finished difference Result 963 states and 1060 transitions. [2023-04-02 00:43:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-02 00:43:23,922 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.850515463917525) internal successors, (941), 193 states have internal predecessors, (941), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 474 [2023-04-02 00:43:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:43:23,925 INFO L225 Difference]: With dead ends: 963 [2023-04-02 00:43:23,925 INFO L226 Difference]: Without dead ends: 956 [2023-04-02 00:43:23,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2023-04-02 00:43:23,928 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 136 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 00:43:23,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 696 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 00:43:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-04-02 00:43:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2023-04-02 00:43:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 952 states have (on average 1.0021008403361344) internal successors, (954), 952 states have internal predecessors, (954), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 957 transitions. [2023-04-02 00:43:23,951 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 957 transitions. Word has length 474 [2023-04-02 00:43:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:43:23,951 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 957 transitions. [2023-04-02 00:43:23,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.850515463917525) internal successors, (941), 193 states have internal predecessors, (941), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:43:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 957 transitions. [2023-04-02 00:43:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2023-04-02 00:43:23,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:43:23,966 INFO L195 NwaCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:43:23,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 00:43:24,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:43:24,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:43:24,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:43:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1345024886, now seen corresponding path program 5 times [2023-04-02 00:43:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:43:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606691354] [2023-04-02 00:43:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:43:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:43:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:43:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:43:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:43:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:49,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:43:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606691354] [2023-04-02 00:43:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606691354] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:43:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438952704] [2023-04-02 00:43:49,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 00:43:49,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:43:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:43:49,971 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) [2023-04-02 00:43:49,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 00:43:52,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 182 check-sat command(s) [2023-04-02 00:43:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:43:52,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 8086 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-02 00:43:52,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:43:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:43:53,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:44:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:44:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438952704] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:44:25,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:44:25,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2023-04-02 00:44:25,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105370355] [2023-04-02 00:44:25,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:44:25,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-04-02 00:44:25,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:44:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-04-02 00:44:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2023-04-02 00:44:25,970 INFO L87 Difference]: Start difference. First operand 956 states and 957 transitions. Second operand has 386 states, 386 states have (on average 4.924870466321243) internal successors, (1901), 385 states have internal predecessors, (1901), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:44:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:44:36,167 INFO L93 Difference]: Finished difference Result 1923 states and 2116 transitions. [2023-04-02 00:44:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2023-04-02 00:44:36,169 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 4.924870466321243) internal successors, (1901), 385 states have internal predecessors, (1901), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 954 [2023-04-02 00:44:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:44:36,174 INFO L225 Difference]: With dead ends: 1923 [2023-04-02 00:44:36,174 INFO L226 Difference]: Without dead ends: 1916 [2023-04-02 00:44:36,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2102 GetRequests, 1718 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2023-04-02 00:44:36,181 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 00:44:36,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1318 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 00:44:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2023-04-02 00:44:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1916. [2023-04-02 00:44:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1912 states have (on average 1.0010460251046025) internal successors, (1914), 1912 states have internal predecessors, (1914), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:44:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 1917 transitions. [2023-04-02 00:44:36,224 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 1917 transitions. Word has length 954 [2023-04-02 00:44:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:44:36,225 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 1917 transitions. [2023-04-02 00:44:36,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 4.924870466321243) internal successors, (1901), 385 states have internal predecessors, (1901), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:44:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 1917 transitions. [2023-04-02 00:44:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1915 [2023-04-02 00:44:36,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:44:36,268 INFO L195 NwaCegarLoop]: trace histogram [374, 373, 373, 373, 373, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:44:36,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 00:44:36,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:44:36,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:44:36,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:44:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1458157706, now seen corresponding path program 6 times [2023-04-02 00:44:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:44:36,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036197336] [2023-04-02 00:44:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:44:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:44:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:46:52,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:46:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:46:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:46:52,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:46:52,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036197336] [2023-04-02 00:46:52,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036197336] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:46:52,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429564297] [2023-04-02 00:46:52,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 00:46:52,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:46:52,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:46:52,938 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) [2023-04-02 00:46:52,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process