/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/bitvector/byte_add-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:36:45,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:36:45,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:36:45,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:36:45,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:36:45,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:36:45,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:36:45,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:36:45,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:36:45,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:36:45,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:36:45,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:36:45,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:36:45,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:36:45,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:36:45,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:36:45,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:36:45,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:36:45,464 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:36:45,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:36:45,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:36:45,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:36:45,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:36:45,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:36:45,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:36:45,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:36:45,465 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:36:45,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:36:45,465 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:36:45,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:36:45,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:36:45,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:36:45,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:36:45,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:36:45,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:36:45,468 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:36:45,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:36:45,468 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:36:45,468 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:36:45,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:36:45,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:36:45,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:36:45,664 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:36:45,664 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:36:45,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add-1.i [2023-03-30 22:36:46,591 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:36:46,730 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:36:46,731 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i [2023-03-30 22:36:46,735 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7604a4c01/04881c2510464b779d63c3f55baeb46f/FLAG96a63c90e [2023-03-30 22:36:46,744 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7604a4c01/04881c2510464b779d63c3f55baeb46f [2023-03-30 22:36:46,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:36:46,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:36:46,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:36:46,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:36:46,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:36:46,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601f00b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46, skipping insertion in model container [2023-03-30 22:36:46,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:36:46,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:36:46,854 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/bitvector/byte_add-1.i[1166,1179] [2023-03-30 22:36:46,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:36:46,890 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:36:46,898 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/bitvector/byte_add-1.i[1166,1179] [2023-03-30 22:36:46,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:36:46,931 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:36:46,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46 WrapperNode [2023-03-30 22:36:46,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:36:46,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:36:46,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:36:46,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:36:46,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:36:46,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:36:46,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:36:46,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:36:46,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (1/1) ... [2023-03-30 22:36:46,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:36:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:36:47,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:36:47,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:36:47,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:36:47,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:36:47,045 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:36:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:36:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure mp_add [2023-03-30 22:36:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:36:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure mp_add [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:36:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:36:47,114 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:36:47,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:36:47,455 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:36:47,460 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:36:47,460 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-30 22:36:47,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:36:47 BoogieIcfgContainer [2023-03-30 22:36:47,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:36:47,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:36:47,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:36:47,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:36:47,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:36:46" (1/3) ... [2023-03-30 22:36:47,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d355ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:36:47, skipping insertion in model container [2023-03-30 22:36:47,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:36:46" (2/3) ... [2023-03-30 22:36:47,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d355ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:36:47, skipping insertion in model container [2023-03-30 22:36:47,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:36:47" (3/3) ... [2023-03-30 22:36:47,466 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2023-03-30 22:36:47,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:36:47,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:36:47,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:36:47,533 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;@79b6a7d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:36:47,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:36:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 52 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:36:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-30 22:36:47,543 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:47,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:47,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:47,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:47,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1379413278, now seen corresponding path program 1 times [2023-03-30 22:36:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786654075] [2023-03-30 22:36:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:47,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:36:47,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:47,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786654075] [2023-03-30 22:36:47,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786654075] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:47,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:47,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:36:47,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397778898] [2023-03-30 22:36:47,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:47,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:36:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:36:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:36:47,736 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 52 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:47,857 INFO L93 Difference]: Finished difference Result 89 states and 137 transitions. [2023-03-30 22:36:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:36:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-03-30 22:36:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:47,864 INFO L225 Difference]: With dead ends: 89 [2023-03-30 22:36:47,864 INFO L226 Difference]: Without dead ends: 54 [2023-03-30 22:36:47,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:36:47,868 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:47,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 10 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:36:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-30 22:36:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-30 22:36:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2023-03-30 22:36:47,894 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 86 transitions. Word has length 25 [2023-03-30 22:36:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:47,894 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 86 transitions. [2023-03-30 22:36:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 86 transitions. [2023-03-30 22:36:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-30 22:36:47,897 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:47,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:47,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:36:47,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:47,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash 724068611, now seen corresponding path program 1 times [2023-03-30 22:36:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:47,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6150351] [2023-03-30 22:36:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:47,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:36:48,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:48,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6150351] [2023-03-30 22:36:48,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6150351] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:48,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:36:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476641037] [2023-03-30 22:36:48,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:36:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:48,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:36:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:36:48,162 INFO L87 Difference]: Start difference. First operand 54 states and 86 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:48,374 INFO L93 Difference]: Finished difference Result 115 states and 194 transitions. [2023-03-30 22:36:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:36:48,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-03-30 22:36:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:48,377 INFO L225 Difference]: With dead ends: 115 [2023-03-30 22:36:48,377 INFO L226 Difference]: Without dead ends: 77 [2023-03-30 22:36:48,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:36:48,383 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:48,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 12 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:36:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-03-30 22:36:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-03-30 22:36:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 68 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 111 transitions. [2023-03-30 22:36:48,404 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 111 transitions. Word has length 25 [2023-03-30 22:36:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:48,404 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 111 transitions. [2023-03-30 22:36:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 111 transitions. [2023-03-30 22:36:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-30 22:36:48,405 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:48,405 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] [2023-03-30 22:36:48,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:36:48,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:48,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1914164658, now seen corresponding path program 1 times [2023-03-30 22:36:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:48,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169978290] [2023-03-30 22:36:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:36:48,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:48,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169978290] [2023-03-30 22:36:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169978290] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:48,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:48,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 22:36:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752395830] [2023-03-30 22:36:48,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:48,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:36:48,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:36:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:36:48,614 INFO L87 Difference]: Start difference. First operand 75 states and 111 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:48,867 INFO L93 Difference]: Finished difference Result 172 states and 287 transitions. [2023-03-30 22:36:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:36:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-03-30 22:36:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:48,869 INFO L225 Difference]: With dead ends: 172 [2023-03-30 22:36:48,869 INFO L226 Difference]: Without dead ends: 134 [2023-03-30 22:36:48,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:36:48,873 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 248 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:48,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 17 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:36:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-03-30 22:36:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2023-03-30 22:36:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 91 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 146 transitions. [2023-03-30 22:36:48,887 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 146 transitions. Word has length 31 [2023-03-30 22:36:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:48,887 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 146 transitions. [2023-03-30 22:36:48,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 146 transitions. [2023-03-30 22:36:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-30 22:36:48,888 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:48,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:36:48,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:48,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1783199843, now seen corresponding path program 1 times [2023-03-30 22:36:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:48,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281024263] [2023-03-30 22:36:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:48,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:36:49,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281024263] [2023-03-30 22:36:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281024263] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:49,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:49,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:36:49,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923589637] [2023-03-30 22:36:49,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:49,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:36:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:49,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:36:49,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:36:49,068 INFO L87 Difference]: Start difference. First operand 98 states and 146 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:49,406 INFO L93 Difference]: Finished difference Result 270 states and 406 transitions. [2023-03-30 22:36:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:36:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-03-30 22:36:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:49,408 INFO L225 Difference]: With dead ends: 270 [2023-03-30 22:36:49,409 INFO L226 Difference]: Without dead ends: 191 [2023-03-30 22:36:49,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:36:49,410 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:49,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 22 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:36:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-03-30 22:36:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 105. [2023-03-30 22:36:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.530612244897959) internal successors, (150), 98 states have internal predecessors, (150), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 156 transitions. [2023-03-30 22:36:49,419 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 156 transitions. Word has length 37 [2023-03-30 22:36:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:49,419 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 156 transitions. [2023-03-30 22:36:49,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 156 transitions. [2023-03-30 22:36:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 22:36:49,420 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:49,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 22:36:49,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:49,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 302427264, now seen corresponding path program 1 times [2023-03-30 22:36:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:49,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184733545] [2023-03-30 22:36:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:49,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:36:49,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:49,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184733545] [2023-03-30 22:36:49,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184733545] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:49,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:49,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:36:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135453549] [2023-03-30 22:36:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:36:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:36:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:36:49,550 INFO L87 Difference]: Start difference. First operand 105 states and 156 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:49,845 INFO L93 Difference]: Finished difference Result 276 states and 412 transitions. [2023-03-30 22:36:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:36:49,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-03-30 22:36:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:49,846 INFO L225 Difference]: With dead ends: 276 [2023-03-30 22:36:49,846 INFO L226 Difference]: Without dead ends: 197 [2023-03-30 22:36:49,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:36:49,847 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 189 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:49,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 22 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:36:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-03-30 22:36:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 116. [2023-03-30 22:36:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 109 states have internal predecessors, (162), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 168 transitions. [2023-03-30 22:36:49,862 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 168 transitions. Word has length 38 [2023-03-30 22:36:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:49,862 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 168 transitions. [2023-03-30 22:36:49,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 168 transitions. [2023-03-30 22:36:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 22:36:49,863 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:49,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-30 22:36:49,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:49,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 507240718, now seen corresponding path program 1 times [2023-03-30 22:36:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735937590] [2023-03-30 22:36:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:49,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:36:50,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735937590] [2023-03-30 22:36:50,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735937590] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:36:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159267296] [2023-03-30 22:36:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:50,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:36:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:36:50,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:36:50,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:36:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:50,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 22:36:50,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:36:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:36:50,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:36:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159267296] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:50,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:36:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-03-30 22:36:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848932200] [2023-03-30 22:36:50,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:36:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:36:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:36:50,163 INFO L87 Difference]: Start difference. First operand 116 states and 168 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:50,341 INFO L93 Difference]: Finished difference Result 238 states and 371 transitions. [2023-03-30 22:36:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:36:50,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-03-30 22:36:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:50,342 INFO L225 Difference]: With dead ends: 238 [2023-03-30 22:36:50,342 INFO L226 Difference]: Without dead ends: 161 [2023-03-30 22:36:50,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:36:50,343 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 37 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:50,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 174 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:36:50,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-03-30 22:36:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2023-03-30 22:36:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.4275362318840579) internal successors, (197), 138 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 203 transitions. [2023-03-30 22:36:50,353 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 203 transitions. Word has length 39 [2023-03-30 22:36:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:50,353 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 203 transitions. [2023-03-30 22:36:50,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 203 transitions. [2023-03-30 22:36:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-30 22:36:50,354 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:50,354 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:50,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:36:50,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-30 22:36:50,562 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:50,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash -972876391, now seen corresponding path program 1 times [2023-03-30 22:36:50,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:50,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243467652] [2023-03-30 22:36:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:50,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:50,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:36:50,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243467652] [2023-03-30 22:36:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243467652] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:36:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142624645] [2023-03-30 22:36:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:36:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:36:50,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:36:50,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:36:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:50,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 22:36:50,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:36:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:36:50,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:36:50,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142624645] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:50,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:36:50,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-03-30 22:36:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460527594] [2023-03-30 22:36:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:36:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:36:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:36:50,786 INFO L87 Difference]: Start difference. First operand 145 states and 203 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:50,915 INFO L93 Difference]: Finished difference Result 296 states and 435 transitions. [2023-03-30 22:36:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:36:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-03-30 22:36:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:50,916 INFO L225 Difference]: With dead ends: 296 [2023-03-30 22:36:50,916 INFO L226 Difference]: Without dead ends: 190 [2023-03-30 22:36:50,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:36:50,917 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 174 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:36:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-03-30 22:36:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 168. [2023-03-30 22:36:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 161 states have (on average 1.391304347826087) internal successors, (224), 161 states have internal predecessors, (224), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2023-03-30 22:36:50,926 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 45 [2023-03-30 22:36:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:50,926 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2023-03-30 22:36:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2023-03-30 22:36:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-30 22:36:50,928 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:50,931 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:50,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:36:51,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-03-30 22:36:51,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:51,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1450133720, now seen corresponding path program 1 times [2023-03-30 22:36:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:51,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562538556] [2023-03-30 22:36:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:51,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:51,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-30 22:36:51,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:51,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562538556] [2023-03-30 22:36:51,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562538556] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:51,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:51,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 22:36:51,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786919920] [2023-03-30 22:36:51,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:51,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:36:51,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:36:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:36:51,288 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:51,805 INFO L93 Difference]: Finished difference Result 596 states and 820 transitions. [2023-03-30 22:36:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:36:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-03-30 22:36:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:51,807 INFO L225 Difference]: With dead ends: 596 [2023-03-30 22:36:51,807 INFO L226 Difference]: Without dead ends: 464 [2023-03-30 22:36:51,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:36:51,808 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 328 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:51,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 27 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:36:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-03-30 22:36:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 168. [2023-03-30 22:36:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 161 states have (on average 1.391304347826087) internal successors, (224), 161 states have internal predecessors, (224), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2023-03-30 22:36:51,824 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 51 [2023-03-30 22:36:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:51,824 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2023-03-30 22:36:51,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2023-03-30 22:36:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-30 22:36:51,830 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:51,830 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:51,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-30 22:36:51,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:51,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 485466550, now seen corresponding path program 1 times [2023-03-30 22:36:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037125203] [2023-03-30 22:36:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:51,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:51,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:51,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-30 22:36:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:51,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037125203] [2023-03-30 22:36:51,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037125203] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:51,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:51,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 22:36:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141091095] [2023-03-30 22:36:51,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:36:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:36:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:36:51,954 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:52,502 INFO L93 Difference]: Finished difference Result 580 states and 800 transitions. [2023-03-30 22:36:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:36:52,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-03-30 22:36:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:52,504 INFO L225 Difference]: With dead ends: 580 [2023-03-30 22:36:52,504 INFO L226 Difference]: Without dead ends: 449 [2023-03-30 22:36:52,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:36:52,505 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 315 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:52,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 27 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:36:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-03-30 22:36:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 351. [2023-03-30 22:36:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 344 states have (on average 1.4040697674418605) internal successors, (483), 344 states have internal predecessors, (483), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 489 transitions. [2023-03-30 22:36:52,522 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 489 transitions. Word has length 52 [2023-03-30 22:36:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:52,522 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 489 transitions. [2023-03-30 22:36:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 489 transitions. [2023-03-30 22:36:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-30 22:36:52,523 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:52,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-30 22:36:52,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:52,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1201869185, now seen corresponding path program 1 times [2023-03-30 22:36:52,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:52,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954141715] [2023-03-30 22:36:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:52,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:52,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-30 22:36:52,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954141715] [2023-03-30 22:36:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954141715] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:52,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-30 22:36:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679095842] [2023-03-30 22:36:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 22:36:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 22:36:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:36:52,670 INFO L87 Difference]: Start difference. First operand 351 states and 489 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:53,720 INFO L93 Difference]: Finished difference Result 1820 states and 2575 transitions. [2023-03-30 22:36:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:36:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-03-30 22:36:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:53,724 INFO L225 Difference]: With dead ends: 1820 [2023-03-30 22:36:53,724 INFO L226 Difference]: Without dead ends: 1470 [2023-03-30 22:36:53,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-03-30 22:36:53,726 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 775 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:53,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 37 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:36:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2023-03-30 22:36:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1074. [2023-03-30 22:36:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1067 states have (on average 1.4198687910028116) internal successors, (1515), 1067 states have internal predecessors, (1515), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1521 transitions. [2023-03-30 22:36:53,773 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1521 transitions. Word has length 53 [2023-03-30 22:36:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:53,773 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1521 transitions. [2023-03-30 22:36:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1521 transitions. [2023-03-30 22:36:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-30 22:36:53,775 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:53,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-30 22:36:53,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:53,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1503357281, now seen corresponding path program 1 times [2023-03-30 22:36:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630060005] [2023-03-30 22:36:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:53,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:36:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630060005] [2023-03-30 22:36:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630060005] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:53,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:36:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059614118] [2023-03-30 22:36:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:36:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:36:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:36:53,865 INFO L87 Difference]: Start difference. First operand 1074 states and 1521 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:54,003 INFO L93 Difference]: Finished difference Result 1470 states and 2054 transitions. [2023-03-30 22:36:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:36:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-03-30 22:36:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:54,008 INFO L225 Difference]: With dead ends: 1470 [2023-03-30 22:36:54,008 INFO L226 Difference]: Without dead ends: 1428 [2023-03-30 22:36:54,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:36:54,009 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:54,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 12 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:36:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-03-30 22:36:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2023-03-30 22:36:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1421 states have (on average 1.3722730471498945) internal successors, (1950), 1421 states have internal predecessors, (1950), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1956 transitions. [2023-03-30 22:36:54,077 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1956 transitions. Word has length 58 [2023-03-30 22:36:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:54,077 INFO L495 AbstractCegarLoop]: Abstraction has 1428 states and 1956 transitions. [2023-03-30 22:36:54,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1956 transitions. [2023-03-30 22:36:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-30 22:36:54,079 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:54,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:54,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-30 22:36:54,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:54,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2132078493, now seen corresponding path program 1 times [2023-03-30 22:36:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:54,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727481727] [2023-03-30 22:36:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:36:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:54,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727481727] [2023-03-30 22:36:54,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727481727] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:36:54,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70728499] [2023-03-30 22:36:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:54,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:36:54,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:36:54,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:36:54,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:36:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 22:36:54,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:36:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:36:54,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:36:54,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70728499] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:54,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:36:54,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 9 [2023-03-30 22:36:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996840489] [2023-03-30 22:36:54,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:54,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:36:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:36:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:36:54,378 INFO L87 Difference]: Start difference. First operand 1428 states and 1956 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:54,491 INFO L93 Difference]: Finished difference Result 1996 states and 2731 transitions. [2023-03-30 22:36:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:36:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-03-30 22:36:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:54,496 INFO L225 Difference]: With dead ends: 1996 [2023-03-30 22:36:54,496 INFO L226 Difference]: Without dead ends: 1498 [2023-03-30 22:36:54,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:36:54,498 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 66 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:54,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 208 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:36:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2023-03-30 22:36:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1402. [2023-03-30 22:36:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1395 states have (on average 1.357706093189964) internal successors, (1894), 1395 states have internal predecessors, (1894), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1900 transitions. [2023-03-30 22:36:54,551 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1900 transitions. Word has length 58 [2023-03-30 22:36:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:54,551 INFO L495 AbstractCegarLoop]: Abstraction has 1402 states and 1900 transitions. [2023-03-30 22:36:54,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1900 transitions. [2023-03-30 22:36:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-30 22:36:54,553 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:54,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:54,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:36:54,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:36:54,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:54,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -311564448, now seen corresponding path program 1 times [2023-03-30 22:36:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:54,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706455682] [2023-03-30 22:36:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:36:54,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:54,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706455682] [2023-03-30 22:36:54,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706455682] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:36:54,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845021215] [2023-03-30 22:36:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:36:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:36:54,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:36:54,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:36:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:54,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-30 22:36:54,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:36:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:36:56,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:36:56,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845021215] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:56,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:36:56,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-03-30 22:36:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673958692] [2023-03-30 22:36:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:56,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:36:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:36:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=79, Unknown=2, NotChecked=0, Total=110 [2023-03-30 22:36:56,005 INFO L87 Difference]: Start difference. First operand 1402 states and 1900 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:58,246 INFO L93 Difference]: Finished difference Result 3022 states and 4130 transitions. [2023-03-30 22:36:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:36:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 59 [2023-03-30 22:36:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:58,251 INFO L225 Difference]: With dead ends: 3022 [2023-03-30 22:36:58,251 INFO L226 Difference]: Without dead ends: 1631 [2023-03-30 22:36:58,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=44, Invalid=110, Unknown=2, NotChecked=0, Total=156 [2023-03-30 22:36:58,253 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 155 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:58,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 413 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 4 Unknown, 0 Unchecked, 2.1s Time] [2023-03-30 22:36:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2023-03-30 22:36:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1449. [2023-03-30 22:36:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1442 states have (on average 1.319001386962552) internal successors, (1902), 1442 states have internal predecessors, (1902), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1908 transitions. [2023-03-30 22:36:58,308 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1908 transitions. Word has length 59 [2023-03-30 22:36:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:58,309 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 1908 transitions. [2023-03-30 22:36:58,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1908 transitions. [2023-03-30 22:36:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-30 22:36:58,310 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:58,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:58,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 22:36:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:36:58,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:58,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash -298294290, now seen corresponding path program 1 times [2023-03-30 22:36:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520833451] [2023-03-30 22:36:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:36:58,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:58,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520833451] [2023-03-30 22:36:58,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520833451] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:58,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:58,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-30 22:36:58,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125695959] [2023-03-30 22:36:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-30 22:36:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-30 22:36:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:36:58,747 INFO L87 Difference]: Start difference. First operand 1449 states and 1908 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:36:59,763 INFO L93 Difference]: Finished difference Result 3754 states and 4976 transitions. [2023-03-30 22:36:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:36:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2023-03-30 22:36:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:36:59,769 INFO L225 Difference]: With dead ends: 3754 [2023-03-30 22:36:59,770 INFO L226 Difference]: Without dead ends: 2449 [2023-03-30 22:36:59,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:36:59,772 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 756 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:36:59,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 37 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:36:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2023-03-30 22:36:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1931. [2023-03-30 22:36:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1924 states have (on average 1.313929313929314) internal successors, (2528), 1924 states have internal predecessors, (2528), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:36:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2534 transitions. [2023-03-30 22:36:59,854 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2534 transitions. Word has length 60 [2023-03-30 22:36:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:36:59,854 INFO L495 AbstractCegarLoop]: Abstraction has 1931 states and 2534 transitions. [2023-03-30 22:36:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:36:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2534 transitions. [2023-03-30 22:36:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-30 22:36:59,858 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:36:59,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:36:59,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-30 22:36:59,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:36:59,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:36:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1343236495, now seen corresponding path program 1 times [2023-03-30 22:36:59,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:36:59,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828620294] [2023-03-30 22:36:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:36:59,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:36:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:59,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:36:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:59,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:36:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:36:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:36:59,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:36:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828620294] [2023-03-30 22:36:59,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828620294] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:36:59,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:36:59,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:36:59,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080360223] [2023-03-30 22:36:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:36:59,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:36:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:36:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:36:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:36:59,997 INFO L87 Difference]: Start difference. First operand 1931 states and 2534 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:37:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:37:00,296 INFO L93 Difference]: Finished difference Result 2622 states and 3446 transitions. [2023-03-30 22:37:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:37:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2023-03-30 22:37:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:37:00,301 INFO L225 Difference]: With dead ends: 2622 [2023-03-30 22:37:00,301 INFO L226 Difference]: Without dead ends: 2038 [2023-03-30 22:37:00,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:37:00,304 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 165 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:37:00,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 22 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:37:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2023-03-30 22:37:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1888. [2023-03-30 22:37:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1881 states have (on average 1.3099415204678362) internal successors, (2464), 1881 states have internal predecessors, (2464), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:37:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2470 transitions. [2023-03-30 22:37:00,380 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2470 transitions. Word has length 62 [2023-03-30 22:37:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:37:00,381 INFO L495 AbstractCegarLoop]: Abstraction has 1888 states and 2470 transitions. [2023-03-30 22:37:00,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:37:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2470 transitions. [2023-03-30 22:37:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-30 22:37:00,383 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:37:00,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:37:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-03-30 22:37:00,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:37:00,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:37:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2053851931, now seen corresponding path program 1 times [2023-03-30 22:37:00,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:37:00,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122942663] [2023-03-30 22:37:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:37:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:37:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:37:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:37:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:37:00,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:37:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:37:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:37:00,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:37:00,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122942663] [2023-03-30 22:37:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122942663] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:37:00,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155420370] [2023-03-30 22:37:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:37:00,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:37:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:37:00,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:37:00,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:37:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:37:00,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-30 22:37:00,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:37:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:37:01,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:37:01,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155420370] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:37:01,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:37:01,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-03-30 22:37:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201107375] [2023-03-30 22:37:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:37:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:37:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:37:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:37:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=99, Unknown=2, NotChecked=0, Total=132 [2023-03-30 22:37:01,994 INFO L87 Difference]: Start difference. First operand 1888 states and 2470 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:37:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:37:10,421 INFO L93 Difference]: Finished difference Result 2645 states and 3478 transitions. [2023-03-30 22:37:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:37:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-03-30 22:37:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:37:10,426 INFO L225 Difference]: With dead ends: 2645 [2023-03-30 22:37:10,427 INFO L226 Difference]: Without dead ends: 2092 [2023-03-30 22:37:10,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=253, Unknown=2, NotChecked=0, Total=342 [2023-03-30 22:37:10,428 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 295 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 13 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:37:10,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 696 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 261 Invalid, 16 Unknown, 0 Unchecked, 8.3s Time] [2023-03-30 22:37:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2023-03-30 22:37:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1857. [2023-03-30 22:37:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1850 states have (on average 1.2962162162162163) internal successors, (2398), 1850 states have internal predecessors, (2398), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:37:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2404 transitions. [2023-03-30 22:37:10,496 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2404 transitions. Word has length 63 [2023-03-30 22:37:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:37:10,496 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2404 transitions. [2023-03-30 22:37:10,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 22:37:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2404 transitions. [2023-03-30 22:37:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-30 22:37:10,498 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:37:10,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:37:10,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:37:10,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-03-30 22:37:10,705 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:37:10,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:37:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -577501126, now seen corresponding path program 1 times [2023-03-30 22:37:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:37:10,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26777248] [2023-03-30 22:37:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:37:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:37:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:37:11,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:37:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:37:11,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:37:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat