/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:20:33,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:20:33,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:20:33,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:20:33,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:20:33,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:20:33,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:20:33,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:20:33,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:20:33,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:20:33,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:20:33,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:20:33,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:20:33,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:20:33,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:20:33,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:20:33,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 01:20:33,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:20:33,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:20:33,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:20:33,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:20:33,403 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:20:33,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:20:33,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:20:33,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:20:33,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:20:33,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:20:33,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:20:33,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:20:33,410 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:20:33,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:20:33,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:20:33,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:20:33,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:20:33,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:20:33,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:20:33,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:20:33,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:20:33,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:20:33,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:20:33,413 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:20:33,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:20:33,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:20:33,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:20:33,652 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:20:33,653 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:20:33,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-2.i [2023-04-02 01:20:34,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:20:34,833 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:20:34,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i [2023-04-02 01:20:34,838 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76fb4da4c/4d6edd4160234bf1a81d989bd3f6de92/FLAG4fe307c03 [2023-04-02 01:20:34,849 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76fb4da4c/4d6edd4160234bf1a81d989bd3f6de92 [2023-04-02 01:20:34,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:20:34,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:20:34,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:20:34,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:20:34,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:20:34,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:20:34" (1/1) ... [2023-04-02 01:20:34,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a903def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:34, skipping insertion in model container [2023-04-02 01:20:34,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:20:34" (1/1) ... [2023-04-02 01:20:34,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:20:34,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:20:34,974 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/loops/vogal-2.i[808,821] [2023-04-02 01:20:35,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:20:35,012 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:20:35,029 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/loops/vogal-2.i[808,821] [2023-04-02 01:20:35,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:20:35,047 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:20:35,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35 WrapperNode [2023-04-02 01:20:35,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:20:35,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:20:35,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:20:35,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:20:35,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,069 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:20:35,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:20:35,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:20:35,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:20:35,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (1/1) ... [2023-04-02 01:20:35,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:20:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:35,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:20:35,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:20:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:20:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:20:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:20:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:20:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:20:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:20:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:20:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 01:20:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:20:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:20:35,220 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:20:35,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:20:35,436 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:20:35,441 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:20:35,441 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-02 01:20:35,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:20:35 BoogieIcfgContainer [2023-04-02 01:20:35,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:20:35,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:20:35,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:20:35,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:20:35,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:20:34" (1/3) ... [2023-04-02 01:20:35,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673b69a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:20:35, skipping insertion in model container [2023-04-02 01:20:35,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:20:35" (2/3) ... [2023-04-02 01:20:35,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673b69a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:20:35, skipping insertion in model container [2023-04-02 01:20:35,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:20:35" (3/3) ... [2023-04-02 01:20:35,449 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2023-04-02 01:20:35,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:20:35,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:20:35,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:20:35,539 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;@46b604e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:20:35,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:20:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:20:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:20:35,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:35,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:35,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:35,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2023-04-02 01:20:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:35,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378949397] [2023-04-02 01:20:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:35,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:35,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:35,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378949397] [2023-04-02 01:20:35,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378949397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:20:35,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:20:35,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:20:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431214364] [2023-04-02 01:20:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:20:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:20:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:20:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:20:35,776 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:35,880 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2023-04-02 01:20:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:20:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 01:20:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:35,885 INFO L225 Difference]: With dead ends: 64 [2023-04-02 01:20:35,886 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 01:20:35,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:20:35,890 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:35,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:20:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 01:20:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 01:20:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-04-02 01:20:35,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2023-04-02 01:20:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:35,927 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-04-02 01:20:35,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-04-02 01:20:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 01:20:35,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:35,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:35,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:20:35,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:35,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2023-04-02 01:20:35,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:35,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826758160] [2023-04-02 01:20:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:36,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:36,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826758160] [2023-04-02 01:20:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826758160] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:20:36,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:20:36,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:20:36,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456741373] [2023-04-02 01:20:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:20:36,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:20:36,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:20:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:20:36,111 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:36,234 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2023-04-02 01:20:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:20:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 01:20:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:36,237 INFO L225 Difference]: With dead ends: 65 [2023-04-02 01:20:36,237 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 01:20:36,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:20:36,240 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:36,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:20:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 01:20:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2023-04-02 01:20:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-04-02 01:20:36,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2023-04-02 01:20:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:36,250 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-04-02 01:20:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-04-02 01:20:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 01:20:36,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:36,251 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] [2023-04-02 01:20:36,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:20:36,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:36,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2023-04-02 01:20:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:36,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810961260] [2023-04-02 01:20:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:36,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:36,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810961260] [2023-04-02 01:20:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810961260] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:36,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811254983] [2023-04-02 01:20:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:36,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:36,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:36,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:36,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:20:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:20:36,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:20:36,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:20:36,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811254983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:20:36,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:20:36,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-04-02 01:20:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784149891] [2023-04-02 01:20:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:20:36,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:20:36,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:20:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:20:36,558 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:36,603 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-04-02 01:20:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:20:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 01:20:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:36,606 INFO L225 Difference]: With dead ends: 54 [2023-04-02 01:20:36,606 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 01:20:36,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:20:36,609 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:36,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 166 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:20:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 01:20:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2023-04-02 01:20:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2023-04-02 01:20:36,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2023-04-02 01:20:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:36,621 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2023-04-02 01:20:36,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2023-04-02 01:20:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 01:20:36,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:36,623 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] [2023-04-02 01:20:36,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 01:20:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:36,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:36,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2023-04-02 01:20:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:36,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8030516] [2023-04-02 01:20:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:20:36,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:36,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8030516] [2023-04-02 01:20:36,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8030516] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:36,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199365387] [2023-04-02 01:20:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:36,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:36,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:37,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:20:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:37,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:20:37,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:20:37,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:20:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199365387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:20:37,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:20:37,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 01:20:37,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218790579] [2023-04-02 01:20:37,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:20:37,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:20:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:20:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:20:37,115 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:37,155 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2023-04-02 01:20:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:20:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 01:20:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:37,158 INFO L225 Difference]: With dead ends: 99 [2023-04-02 01:20:37,158 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 01:20:37,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:20:37,160 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:37,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:20:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 01:20:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2023-04-02 01:20:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2023-04-02 01:20:37,176 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2023-04-02 01:20:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:37,177 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2023-04-02 01:20:37,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2023-04-02 01:20:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 01:20:37,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:37,178 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:37,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:37,384 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,SelfDestructingSolverStorable3 [2023-04-02 01:20:37,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:37,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2023-04-02 01:20:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:37,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898967604] [2023-04-02 01:20:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:20:37,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898967604] [2023-04-02 01:20:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898967604] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915340535] [2023-04-02 01:20:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:37,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:37,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:37,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:37,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:20:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:37,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:20:37,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:20:37,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:37,848 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-04-02 01:20:37,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2023-04-02 01:20:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:20:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915340535] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:37,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:20:37,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2023-04-02 01:20:37,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351012149] [2023-04-02 01:20:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:20:37,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 01:20:37,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 01:20:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:20:37,870 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:37,976 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-04-02 01:20:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:20:37,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-02 01:20:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:37,979 INFO L225 Difference]: With dead ends: 66 [2023-04-02 01:20:37,979 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 01:20:37,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:20:37,981 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:37,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:20:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 01:20:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 01:20:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-04-02 01:20:37,992 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2023-04-02 01:20:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:37,992 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-04-02 01:20:37,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-04-02 01:20:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:20:37,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:37,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:38,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:38,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:38,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:38,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2023-04-02 01:20:38,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:38,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900439599] [2023-04-02 01:20:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:20:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:38,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900439599] [2023-04-02 01:20:38,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900439599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:38,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264182987] [2023-04-02 01:20:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:38,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:38,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:38,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:38,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:20:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:38,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 01:20:38,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:38,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-02 01:20:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:20:38,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:38,534 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-04-02 01:20:38,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2023-04-02 01:20:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:20:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264182987] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:38,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:38,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2023-04-02 01:20:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523130217] [2023-04-02 01:20:38,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:38,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:20:38,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:20:38,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:20:38,557 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:38,880 INFO L93 Difference]: Finished difference Result 165 states and 224 transitions. [2023-04-02 01:20:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 01:20:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 01:20:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:38,881 INFO L225 Difference]: With dead ends: 165 [2023-04-02 01:20:38,881 INFO L226 Difference]: Without dead ends: 130 [2023-04-02 01:20:38,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:20:38,882 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 373 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:38,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 44 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:20:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-04-02 01:20:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2023-04-02 01:20:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-04-02 01:20:38,890 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2023-04-02 01:20:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:38,890 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-04-02 01:20:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-04-02 01:20:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 01:20:38,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:38,891 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] [2023-04-02 01:20:38,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:39,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:39,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:39,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1564564384, now seen corresponding path program 1 times [2023-04-02 01:20:39,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:39,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707015187] [2023-04-02 01:20:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 01:20:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707015187] [2023-04-02 01:20:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707015187] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178862130] [2023-04-02 01:20:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:39,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:39,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:39,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:20:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:39,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:20:39,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:20:39,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:20:39,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178862130] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:39,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:39,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2023-04-02 01:20:39,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703865073] [2023-04-02 01:20:39,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:39,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:20:39,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:20:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:20:39,307 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:39,845 INFO L93 Difference]: Finished difference Result 325 states and 469 transitions. [2023-04-02 01:20:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 01:20:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-02 01:20:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:39,846 INFO L225 Difference]: With dead ends: 325 [2023-04-02 01:20:39,846 INFO L226 Difference]: Without dead ends: 288 [2023-04-02 01:20:39,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 01:20:39,847 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 447 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:39,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 42 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:20:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-04-02 01:20:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 72. [2023-04-02 01:20:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2023-04-02 01:20:39,888 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 32 [2023-04-02 01:20:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:39,888 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2023-04-02 01:20:39,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2023-04-02 01:20:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 01:20:39,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:39,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:39,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:40,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:40,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash -712424321, now seen corresponding path program 2 times [2023-04-02 01:20:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885360310] [2023-04-02 01:20:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:40,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 01:20:40,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885360310] [2023-04-02 01:20:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885360310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087427513] [2023-04-02 01:20:40,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:20:40,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:40,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:40,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:40,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:20:40,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:20:40,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:20:40,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:20:40,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:20:40,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 01:20:40,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087427513] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:40,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:40,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 13 [2023-04-02 01:20:40,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430595394] [2023-04-02 01:20:40,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:40,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:20:40,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:20:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:20:40,321 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:41,280 INFO L93 Difference]: Finished difference Result 499 states and 747 transitions. [2023-04-02 01:20:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 01:20:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-04-02 01:20:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:41,283 INFO L225 Difference]: With dead ends: 499 [2023-04-02 01:20:41,283 INFO L226 Difference]: Without dead ends: 440 [2023-04-02 01:20:41,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=507, Invalid=1655, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 01:20:41,284 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 856 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:41,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 32 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:20:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-04-02 01:20:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 136. [2023-04-02 01:20:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.297709923664122) internal successors, (170), 131 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2023-04-02 01:20:41,331 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 39 [2023-04-02 01:20:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:41,331 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2023-04-02 01:20:41,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2023-04-02 01:20:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:20:41,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:41,333 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:41,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 01:20:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:41,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:41,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1752464547, now seen corresponding path program 3 times [2023-04-02 01:20:41,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:41,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677603600] [2023-04-02 01:20:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 01:20:41,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677603600] [2023-04-02 01:20:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677603600] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755596089] [2023-04-02 01:20:41,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:20:41,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:41,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:41,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:41,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:20:41,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 01:20:41,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:20:41,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 01:20:41,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:41,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 01:20:41,895 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:20:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:20:41,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:20:41,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 13 [2023-04-02 01:20:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 01:20:41,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-02 01:20:41,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755596089] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:41,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:20:41,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 11] total 22 [2023-04-02 01:20:41,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948646026] [2023-04-02 01:20:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:20:41,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:20:41,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:20:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-04-02 01:20:41,999 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:42,098 INFO L93 Difference]: Finished difference Result 231 states and 298 transitions. [2023-04-02 01:20:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:20:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-02 01:20:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:42,106 INFO L225 Difference]: With dead ends: 231 [2023-04-02 01:20:42,106 INFO L226 Difference]: Without dead ends: 179 [2023-04-02 01:20:42,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-04-02 01:20:42,110 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:42,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 105 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:20:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-04-02 01:20:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2023-04-02 01:20:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.2954545454545454) internal successors, (171), 132 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2023-04-02 01:20:42,135 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 53 [2023-04-02 01:20:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:42,136 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2023-04-02 01:20:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2023-04-02 01:20:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 01:20:42,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:42,140 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:42,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:42,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:42,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1057253248, now seen corresponding path program 1 times [2023-04-02 01:20:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:42,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741508637] [2023-04-02 01:20:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:42,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 01:20:42,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:42,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741508637] [2023-04-02 01:20:42,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741508637] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:42,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569358189] [2023-04-02 01:20:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:42,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:42,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:42,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 01:20:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:42,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 01:20:42,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 01:20:42,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:20:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569358189] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:42,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12] total 19 [2023-04-02 01:20:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570714442] [2023-04-02 01:20:42,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 01:20:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 01:20:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:20:42,810 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:44,128 INFO L93 Difference]: Finished difference Result 1032 states and 1379 transitions. [2023-04-02 01:20:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:20:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 01:20:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:44,131 INFO L225 Difference]: With dead ends: 1032 [2023-04-02 01:20:44,131 INFO L226 Difference]: Without dead ends: 910 [2023-04-02 01:20:44,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 01:20:44,132 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 900 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:44,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 57 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:20:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-04-02 01:20:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 149. [2023-04-02 01:20:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2708333333333333) internal successors, (183), 144 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 187 transitions. [2023-04-02 01:20:44,157 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 187 transitions. Word has length 66 [2023-04-02 01:20:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:44,158 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 187 transitions. [2023-04-02 01:20:44,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 187 transitions. [2023-04-02 01:20:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 01:20:44,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:44,159 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:44,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:44,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 01:20:44,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:44,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1845542220, now seen corresponding path program 2 times [2023-04-02 01:20:44,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:44,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675872764] [2023-04-02 01:20:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:44,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-04-02 01:20:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675872764] [2023-04-02 01:20:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675872764] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962426535] [2023-04-02 01:20:44,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:20:44,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:44,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:44,521 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:44,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 01:20:44,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:20:44,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:20:44,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 01:20:44,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 139 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 01:20:44,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-04-02 01:20:44,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962426535] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:44,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:44,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 9] total 25 [2023-04-02 01:20:44,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962174865] [2023-04-02 01:20:44,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 01:20:44,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 01:20:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-04-02 01:20:44,912 INFO L87 Difference]: Start difference. First operand 149 states and 187 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 24 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:48,890 INFO L93 Difference]: Finished difference Result 1174 states and 1695 transitions. [2023-04-02 01:20:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-04-02 01:20:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 24 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-02 01:20:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:48,894 INFO L225 Difference]: With dead ends: 1174 [2023-04-02 01:20:48,894 INFO L226 Difference]: Without dead ends: 1087 [2023-04-02 01:20:48,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1427, Invalid=11005, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 01:20:48,898 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2164 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6305 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 6460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 6305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:48,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2164 Valid, 82 Invalid, 6460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 6305 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 01:20:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2023-04-02 01:20:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 221. [2023-04-02 01:20:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.2916666666666667) internal successors, (279), 216 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 283 transitions. [2023-04-02 01:20:48,938 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 283 transitions. Word has length 78 [2023-04-02 01:20:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:48,938 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 283 transitions. [2023-04-02 01:20:48,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 24 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:20:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 283 transitions. [2023-04-02 01:20:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 01:20:48,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:48,939 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:48,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:49,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:49,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 3 times [2023-04-02 01:20:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893150577] [2023-04-02 01:20:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:53,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-02 01:20:53,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893150577] [2023-04-02 01:20:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893150577] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030424260] [2023-04-02 01:20:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:20:53,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:53,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:53,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 01:20:54,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-02 01:20:54,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:20:54,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 95 conjunts are in the unsatisfiable core [2023-04-02 01:20:54,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-02 01:20:54,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:54,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:55,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:55,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-04-02 01:20:55,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-04-02 01:20:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 142 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-04-02 01:20:55,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:21:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 149 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-04-02 01:21:17,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030424260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:21:17,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:21:17,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 35] total 89 [2023-04-02 01:21:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254536104] [2023-04-02 01:21:17,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:21:17,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-04-02 01:21:17,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:21:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-04-02 01:21:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=6625, Unknown=2, NotChecked=0, Total=7832 [2023-04-02 01:21:17,137 INFO L87 Difference]: Start difference. First operand 221 states and 283 transitions. Second operand has 89 states, 89 states have (on average 2.168539325842697) internal successors, (193), 88 states have internal predecessors, (193), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)