/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-tiling/pr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:58:16,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:58:16,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:58:16,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:58:16,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:58:16,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:58:16,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:58:16,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:58:16,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:58:16,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:58:16,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:58:16,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:58:16,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:58:16,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:58:16,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:58:16,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:58:16,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:58:16,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:58:16,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:58:16,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:58:16,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:58:16,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:58:16,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:58:16,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:58:16,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:58:16,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:58:16,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:58:16,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:58:16,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:58:16,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:58:16,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:58:16,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:58:16,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:58:16,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:58:16,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:58:16,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:58:16,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:58:16,961 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:58:16,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:58:16,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:58:16,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:58:16,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:58:16,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:58:16,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:58:16,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:58:16,963 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:58:16,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:58:16,964 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:58:16,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:58:16,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:58:16,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:58:16,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:58:16,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:58:16,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:58:16,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:58:16,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:58:16,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:58:16,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:58:16,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:58:16,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:58:16,967 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:58:17,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:58:17,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:58:17,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:58:17,216 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:58:17,217 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:58:17,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr3.c [2023-04-01 18:58:18,319 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:58:18,459 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:58:18,459 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c [2023-04-01 18:58:18,464 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e819e9f0/2c9741477dec41e68d3d531f04db4ed1/FLAG33ef7ac48 [2023-04-01 18:58:18,475 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e819e9f0/2c9741477dec41e68d3d531f04db4ed1 [2023-04-01 18:58:18,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:58:18,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:58:18,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:58:18,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:58:18,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:58:18,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1efcc124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18, skipping insertion in model container [2023-04-01 18:58:18,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:58:18,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:58:18,607 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c[394,407] [2023-04-01 18:58:18,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:58:18,632 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:58:18,641 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c[394,407] [2023-04-01 18:58:18,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:58:18,660 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:58:18,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18 WrapperNode [2023-04-01 18:58:18,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:58:18,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:58:18,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:58:18,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:58:18,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,701 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:58:18,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:58:18,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:58:18,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:58:18,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (1/1) ... [2023-04-01 18:58:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:58:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:18,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:58:18,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:58:18,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:58:18,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:58:18,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:58:18,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:58:18,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:58:18,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:58:18,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:58:18,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:58:18,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:58:18,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:58:18,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:58:18,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:58:18,846 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:58:18,848 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:58:18,997 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:58:19,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:58:19,002 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 18:58:19,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:58:19 BoogieIcfgContainer [2023-04-01 18:58:19,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:58:19,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:58:19,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:58:19,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:58:19,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:58:18" (1/3) ... [2023-04-01 18:58:19,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c38025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:58:19, skipping insertion in model container [2023-04-01 18:58:19,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:18" (2/3) ... [2023-04-01 18:58:19,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c38025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:58:19, skipping insertion in model container [2023-04-01 18:58:19,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:58:19" (3/3) ... [2023-04-01 18:58:19,012 INFO L112 eAbstractionObserver]: Analyzing ICFG pr3.c [2023-04-01 18:58:19,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:58:19,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:58:19,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:58:19,070 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;@1dc199d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:58:19,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:58:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:58:19,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:19,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:19,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:19,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash 208371713, now seen corresponding path program 1 times [2023-04-01 18:58:19,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:19,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751114588] [2023-04-01 18:58:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:19,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:19,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:19,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:19,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751114588] [2023-04-01 18:58:19,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751114588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:19,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:19,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:58:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248288606] [2023-04-01 18:58:19,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:58:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:58:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:58:19,320 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:19,497 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-04-01 18:58:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:58:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:58:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:19,504 INFO L225 Difference]: With dead ends: 63 [2023-04-01 18:58:19,504 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:58:19,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:58:19,510 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:19,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:58:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:58:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:58:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-04-01 18:58:19,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2023-04-01 18:58:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:19,543 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-04-01 18:58:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-04-01 18:58:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:58:19,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:19,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:19,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:58:19,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:19,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash -963394890, now seen corresponding path program 1 times [2023-04-01 18:58:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:19,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806897117] [2023-04-01 18:58:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:19,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:19,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806897117] [2023-04-01 18:58:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806897117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:19,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:19,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:58:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36435029] [2023-04-01 18:58:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:19,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:58:19,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:58:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:19,806 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:19,935 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-01 18:58:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:58:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:58:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:19,937 INFO L225 Difference]: With dead ends: 39 [2023-04-01 18:58:19,937 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 18:58:19,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:58:19,938 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:19,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 96 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 18:58:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-04-01 18:58:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-04-01 18:58:19,946 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2023-04-01 18:58:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:19,946 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-04-01 18:58:19,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-04-01 18:58:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:58:19,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:19,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:19,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:58:19,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:19,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash -961547848, now seen corresponding path program 1 times [2023-04-01 18:58:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911178270] [2023-04-01 18:58:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:19,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:20,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:20,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911178270] [2023-04-01 18:58:20,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911178270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:20,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:20,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:58:20,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061152530] [2023-04-01 18:58:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:58:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:58:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:20,179 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:20,296 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-04-01 18:58:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:58:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 18:58:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:20,300 INFO L225 Difference]: With dead ends: 58 [2023-04-01 18:58:20,301 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 18:58:20,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:58:20,309 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:20,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 26 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 18:58:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-04-01 18:58:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-04-01 18:58:20,328 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2023-04-01 18:58:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:20,328 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-04-01 18:58:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-04-01 18:58:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 18:58:20,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:20,329 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] [2023-04-01 18:58:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:58:20,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:20,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash -416921679, now seen corresponding path program 1 times [2023-04-01 18:58:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681273356] [2023-04-01 18:58:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:20,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:20,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681273356] [2023-04-01 18:58:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681273356] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:20,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:20,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:58:20,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435001246] [2023-04-01 18:58:20,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:20,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:58:20,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:20,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:58:20,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:58:20,503 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:20,605 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2023-04-01 18:58:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:58:20,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 18:58:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:20,609 INFO L225 Difference]: With dead ends: 71 [2023-04-01 18:58:20,609 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 18:58:20,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:20,617 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:20,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 18:58:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2023-04-01 18:58:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-04-01 18:58:20,630 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 27 [2023-04-01 18:58:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:20,631 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-04-01 18:58:20,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-04-01 18:58:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 18:58:20,632 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:20,632 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] [2023-04-01 18:58:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:58:20,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:20,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash -809948689, now seen corresponding path program 1 times [2023-04-01 18:58:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961840630] [2023-04-01 18:58:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:20,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961840630] [2023-04-01 18:58:20,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961840630] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:20,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:20,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:58:20,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629942920] [2023-04-01 18:58:20,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:20,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:58:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:58:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:58:20,766 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:20,855 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-04-01 18:58:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:58:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 18:58:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:20,857 INFO L225 Difference]: With dead ends: 71 [2023-04-01 18:58:20,857 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 18:58:20,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:20,858 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:20,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 48 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 18:58:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2023-04-01 18:58:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-04-01 18:58:20,877 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 27 [2023-04-01 18:58:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:20,877 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-04-01 18:58:20,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-04-01 18:58:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 18:58:20,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:20,879 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] [2023-04-01 18:58:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 18:58:20,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:20,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash -108884111, now seen corresponding path program 1 times [2023-04-01 18:58:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:20,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071879454] [2023-04-01 18:58:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:20,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:21,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:21,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071879454] [2023-04-01 18:58:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071879454] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754416322] [2023-04-01 18:58:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:21,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:21,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:58:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:21,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 18:58:21,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:21,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:21,555 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 19 treesize of output 18 [2023-04-01 18:58:21,580 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 19 treesize of output 18 [2023-04-01 18:58:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:21,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:21,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 18:58:21,735 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 14 treesize of output 12 [2023-04-01 18:58:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:21,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754416322] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:21,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:21,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 8] total 21 [2023-04-01 18:58:21,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198202548] [2023-04-01 18:58:21,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:21,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 18:58:21,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 18:58:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:58:21,778 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:22,323 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2023-04-01 18:58:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 18:58:22,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-04-01 18:58:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:22,325 INFO L225 Difference]: With dead ends: 84 [2023-04-01 18:58:22,325 INFO L226 Difference]: Without dead ends: 82 [2023-04-01 18:58:22,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 18:58:22,327 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 179 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:22,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 160 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:58:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-01 18:58:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2023-04-01 18:58:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-04-01 18:58:22,337 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 27 [2023-04-01 18:58:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:22,338 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-04-01 18:58:22,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-04-01 18:58:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 18:58:22,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:22,339 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] [2023-04-01 18:58:22,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:58:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 18:58:22,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:22,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -675087117, now seen corresponding path program 1 times [2023-04-01 18:58:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:22,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927298443] [2023-04-01 18:58:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:22,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:22,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:22,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927298443] [2023-04-01 18:58:22,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927298443] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:22,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428661978] [2023-04-01 18:58:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:22,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:22,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:58:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:23,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 18:58:23,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:23,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:23,118 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 19 treesize of output 18 [2023-04-01 18:58:23,130 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 19 treesize of output 18 [2023-04-01 18:58:23,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:58:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:23,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:23,267 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 17 treesize of output 15 [2023-04-01 18:58:23,269 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 16 treesize of output 14 [2023-04-01 18:58:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:23,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428661978] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:23,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:23,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2023-04-01 18:58:23,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060901535] [2023-04-01 18:58:23,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:23,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 18:58:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 18:58:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-01 18:58:23,295 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:23,809 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2023-04-01 18:58:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 18:58:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-04-01 18:58:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:23,810 INFO L225 Difference]: With dead ends: 121 [2023-04-01 18:58:23,811 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 18:58:23,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 18:58:23,812 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:23,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 119 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:58:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 18:58:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 54. [2023-04-01 18:58:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-04-01 18:58:23,824 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2023-04-01 18:58:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:23,824 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-04-01 18:58:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-04-01 18:58:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 18:58:23,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:23,825 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] [2023-04-01 18:58:23,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 18:58:24,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-04-01 18:58:24,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:24,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:24,031 INFO L85 PathProgramCache]: Analyzing trace with hash -820555110, now seen corresponding path program 1 times [2023-04-01 18:58:24,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:24,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083821125] [2023-04-01 18:58:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:24,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:24,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:24,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083821125] [2023-04-01 18:58:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083821125] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:24,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:58:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917687562] [2023-04-01 18:58:24,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:24,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:58:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:58:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:24,077 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:24,151 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-04-01 18:58:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:58:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-01 18:58:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:24,152 INFO L225 Difference]: With dead ends: 82 [2023-04-01 18:58:24,152 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 18:58:24,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:24,154 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:24,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:58:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 18:58:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-04-01 18:58:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 45 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-04-01 18:58:24,168 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 32 [2023-04-01 18:58:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:24,168 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-04-01 18:58:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-04-01 18:58:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 18:58:24,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:24,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:24,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 18:58:24,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:24,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash -968077034, now seen corresponding path program 1 times [2023-04-01 18:58:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:24,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548843453] [2023-04-01 18:58:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:24,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548843453] [2023-04-01 18:58:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548843453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:24,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:24,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:58:24,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080090841] [2023-04-01 18:58:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:58:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:58:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:24,218 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:24,275 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2023-04-01 18:58:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:58:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-01 18:58:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:24,277 INFO L225 Difference]: With dead ends: 76 [2023-04-01 18:58:24,277 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 18:58:24,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:24,278 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:24,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 52 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:58:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 18:58:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-04-01 18:58:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-04-01 18:58:24,287 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 32 [2023-04-01 18:58:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:24,288 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-04-01 18:58:24,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-04-01 18:58:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 18:58:24,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:24,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:24,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 18:58:24,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:24,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -951746386, now seen corresponding path program 1 times [2023-04-01 18:58:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751306193] [2023-04-01 18:58:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:58:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:24,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751306193] [2023-04-01 18:58:24,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751306193] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553013692] [2023-04-01 18:58:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:24,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:24,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:24,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:24,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:58:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:24,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 18:58:24,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:24,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:24,628 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 19 treesize of output 18 [2023-04-01 18:58:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:24,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:24,969 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 17 treesize of output 15 [2023-04-01 18:58:24,971 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 16 treesize of output 12 [2023-04-01 18:58:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553013692] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:24,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:24,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 25 [2023-04-01 18:58:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948967488] [2023-04-01 18:58:24,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 18:58:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 18:58:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2023-04-01 18:58:24,993 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 25 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 18:58:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:25,573 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2023-04-01 18:58:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:58:25,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2023-04-01 18:58:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:25,575 INFO L225 Difference]: With dead ends: 121 [2023-04-01 18:58:25,575 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 18:58:25,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:58:25,576 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:25,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 138 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:58:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 18:58:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2023-04-01 18:58:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:58:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-04-01 18:58:25,597 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 36 [2023-04-01 18:58:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:25,599 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-04-01 18:58:25,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 18:58:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-04-01 18:58:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 18:58:25,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:25,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:25,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:25,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:25,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:25,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1132143980, now seen corresponding path program 1 times [2023-04-01 18:58:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:25,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458787089] [2023-04-01 18:58:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:25,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:26,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:26,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:58:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:26,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458787089] [2023-04-01 18:58:26,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458787089] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418651081] [2023-04-01 18:58:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:26,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:26,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:58:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:26,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 18:58:26,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:26,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:26,275 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 19 treesize of output 18 [2023-04-01 18:58:26,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:58:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:26,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:26,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 18:58:26,462 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 18 treesize of output 14 [2023-04-01 18:58:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418651081] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:26,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:26,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-04-01 18:58:26,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347427466] [2023-04-01 18:58:26,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:26,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 18:58:26,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 18:58:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:58:26,485 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:58:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:27,128 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2023-04-01 18:58:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:58:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2023-04-01 18:58:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:27,130 INFO L225 Difference]: With dead ends: 180 [2023-04-01 18:58:27,130 INFO L226 Difference]: Without dead ends: 156 [2023-04-01 18:58:27,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1157, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 18:58:27,131 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:27,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 150 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:58:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-04-01 18:58:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 103. [2023-04-01 18:58:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 87 states have internal predecessors, (103), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:58:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2023-04-01 18:58:27,148 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 36 [2023-04-01 18:58:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:27,149 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2023-04-01 18:58:27,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:58:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2023-04-01 18:58:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 18:58:27,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:27,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:27,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:27,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:27,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:27,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1639397347, now seen corresponding path program 1 times [2023-04-01 18:58:27,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:27,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523911874] [2023-04-01 18:58:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:27,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:58:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:58:27,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:27,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523911874] [2023-04-01 18:58:27,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523911874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:27,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:27,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:58:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791907046] [2023-04-01 18:58:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:27,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:58:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:58:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:27,401 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:58:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:27,464 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2023-04-01 18:58:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:58:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-04-01 18:58:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:27,466 INFO L225 Difference]: With dead ends: 127 [2023-04-01 18:58:27,466 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 18:58:27,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:27,467 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:27,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:58:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 18:58:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-04-01 18:58:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.216867469879518) internal successors, (101), 87 states have internal predecessors, (101), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:58:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2023-04-01 18:58:27,484 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 41 [2023-04-01 18:58:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:27,485 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2023-04-01 18:58:27,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:58:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2023-04-01 18:58:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 18:58:27,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:27,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:27,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 18:58:27,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:27,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:27,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1563359383, now seen corresponding path program 1 times [2023-04-01 18:58:27,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:27,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981612133] [2023-04-01 18:58:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:27,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:58:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:58:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:27,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981612133] [2023-04-01 18:58:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981612133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:27,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:27,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:58:27,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100767928] [2023-04-01 18:58:27,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:27,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:58:27,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:58:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:27,521 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:58:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:27,580 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2023-04-01 18:58:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:58:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-04-01 18:58:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:27,581 INFO L225 Difference]: With dead ends: 122 [2023-04-01 18:58:27,581 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 18:58:27,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:27,582 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:27,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 45 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:58:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 18:58:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-04-01 18:58:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 81 states have internal predecessors, (92), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:58:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-04-01 18:58:27,597 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 41 [2023-04-01 18:58:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:27,597 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-04-01 18:58:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:58:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-04-01 18:58:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 18:58:27,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:27,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 18:58:27,598 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:27,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1396595695, now seen corresponding path program 2 times [2023-04-01 18:58:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702747241] [2023-04-01 18:58:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:58:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-04-01 18:58:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702747241] [2023-04-01 18:58:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702747241] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730799720] [2023-04-01 18:58:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:58:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:27,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:58:27,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:58:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:27,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 18:58:27,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:27,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:28,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:28,259 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 17 treesize of output 15 [2023-04-01 18:58:28,261 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 16 treesize of output 12 [2023-04-01 18:58:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730799720] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:28,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:28,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 22 [2023-04-01 18:58:28,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197351837] [2023-04-01 18:58:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:28,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 18:58:28,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 18:58:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-04-01 18:58:28,276 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 19 states have internal predecessors, (65), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:58:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:28,938 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2023-04-01 18:58:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 18:58:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 19 states have internal predecessors, (65), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2023-04-01 18:58:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:28,944 INFO L225 Difference]: With dead ends: 233 [2023-04-01 18:58:28,944 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 18:58:28,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 18:58:28,946 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:28,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 221 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:58:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 18:58:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 187. [2023-04-01 18:58:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 158 states have internal predecessors, (180), 22 states have call successors, (22), 16 states have call predecessors, (22), 15 states have return successors, (21), 12 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 18:58:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 223 transitions. [2023-04-01 18:58:28,992 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 223 transitions. Word has length 45 [2023-04-01 18:58:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:28,992 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 223 transitions. [2023-04-01 18:58:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 19 states have internal predecessors, (65), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:58:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 223 transitions. [2023-04-01 18:58:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 18:58:28,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:28,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:29,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 18:58:29,199 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:29,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1999009043, now seen corresponding path program 2 times [2023-04-01 18:58:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096843075] [2023-04-01 18:58:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:29,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:29,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:29,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:29,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:58:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:29,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-04-01 18:58:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:29,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:29,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096843075] [2023-04-01 18:58:29,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096843075] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:29,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884947] [2023-04-01 18:58:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:58:29,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:29,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:29,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:58:29,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:58:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:29,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 18:58:29,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:29,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:29,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:29,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 18:58:29,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 18:58:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:58:29,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884947] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:29,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:29,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 24 [2023-04-01 18:58:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083198281] [2023-04-01 18:58:29,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:29,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 18:58:29,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:29,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 18:58:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:58:29,900 INFO L87 Difference]: Start difference. First operand 187 states and 223 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-01 18:58:31,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:33,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:36,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:38,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:40,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:42,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:44,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:46,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:48,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:50,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:52,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:58:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:53,242 INFO L93 Difference]: Finished difference Result 349 states and 412 transitions. [2023-04-01 18:58:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 18:58:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2023-04-01 18:58:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:53,244 INFO L225 Difference]: With dead ends: 349 [2023-04-01 18:58:53,244 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 18:58:53,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:58:53,246 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 120 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:53,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 177 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 770 Invalid, 12 Unknown, 0 Unchecked, 23.0s Time] [2023-04-01 18:58:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 18:58:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 251. [2023-04-01 18:58:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 199 states have (on average 1.185929648241206) internal successors, (236), 211 states have internal predecessors, (236), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (30), 18 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-01 18:58:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 297 transitions. [2023-04-01 18:58:53,289 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 297 transitions. Word has length 45 [2023-04-01 18:58:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:53,289 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 297 transitions. [2023-04-01 18:58:53,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-01 18:58:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 297 transitions. [2023-04-01 18:58:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 18:58:53,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:53,290 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:53,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:53,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 18:58:53,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:53,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:53,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1247567858, now seen corresponding path program 3 times [2023-04-01 18:58:53,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:53,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645587967] [2023-04-01 18:58:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:53,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 18:58:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-04-01 18:58:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:58:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645587967] [2023-04-01 18:58:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645587967] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313768102] [2023-04-01 18:58:53,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:58:53,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:53,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:53,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:58:53,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:58:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:53,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 18:58:53,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:53,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:53,964 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 19 treesize of output 18 [2023-04-01 18:58:53,978 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 19 treesize of output 18 [2023-04-01 18:58:54,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:58:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 18:58:54,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:54,164 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 17 treesize of output 15 [2023-04-01 18:58:54,166 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 22 treesize of output 20 [2023-04-01 18:58:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:58:54,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313768102] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:54,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:54,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2023-04-01 18:58:54,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094658988] [2023-04-01 18:58:54,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:54,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 18:58:54,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:54,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 18:58:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-04-01 18:58:54,215 INFO L87 Difference]: Start difference. First operand 251 states and 297 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:58:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:55,271 INFO L93 Difference]: Finished difference Result 498 states and 586 transitions. [2023-04-01 18:58:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 18:58:55,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 54 [2023-04-01 18:58:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:55,273 INFO L225 Difference]: With dead ends: 498 [2023-04-01 18:58:55,274 INFO L226 Difference]: Without dead ends: 293 [2023-04-01 18:58:55,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=367, Invalid=1525, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 18:58:55,276 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:55,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 136 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:58:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-04-01 18:58:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 259. [2023-04-01 18:58:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 207 states have (on average 1.1642512077294687) internal successors, (241), 219 states have internal predecessors, (241), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (30), 18 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-01 18:58:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 302 transitions. [2023-04-01 18:58:55,338 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 302 transitions. Word has length 54 [2023-04-01 18:58:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:55,338 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 302 transitions. [2023-04-01 18:58:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:58:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 302 transitions. [2023-04-01 18:58:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 18:58:55,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:55,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:55,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:55,545 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:55,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1134978417, now seen corresponding path program 1 times [2023-04-01 18:58:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081724933] [2023-04-01 18:58:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 18:58:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 18:58:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 18:58:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081724933] [2023-04-01 18:58:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081724933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:58:55,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778076042] [2023-04-01 18:58:55,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:55,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:58:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:58:55,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:55,592 INFO L87 Difference]: Start difference. First operand 259 states and 302 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:58:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:55,671 INFO L93 Difference]: Finished difference Result 340 states and 397 transitions. [2023-04-01 18:58:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:58:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2023-04-01 18:58:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:55,672 INFO L225 Difference]: With dead ends: 340 [2023-04-01 18:58:55,672 INFO L226 Difference]: Without dead ends: 200 [2023-04-01 18:58:55,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:55,673 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:55,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 47 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:58:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-04-01 18:58:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2023-04-01 18:58:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 154 states have (on average 1.1363636363636365) internal successors, (175), 163 states have internal predecessors, (175), 24 states have call successors, (24), 16 states have call predecessors, (24), 15 states have return successors, (23), 14 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 18:58:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2023-04-01 18:58:55,708 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 55 [2023-04-01 18:58:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:55,708 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2023-04-01 18:58:55,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:58:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2023-04-01 18:58:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 18:58:55,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:55,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:55,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 18:58:55,710 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:55,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1879677317, now seen corresponding path program 4 times [2023-04-01 18:58:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:55,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618937599] [2023-04-01 18:58:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:55,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:56,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:58:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:56,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:58:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:56,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 18:58:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618937599] [2023-04-01 18:58:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618937599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444552614] [2023-04-01 18:58:56,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:58:56,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:56,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:56,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:56,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:58:56,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:58:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:56,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 18:58:56,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:56,256 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 15 treesize of output 11 [2023-04-01 18:58:56,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:58:56,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 18:58:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 18:58:56,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:58:56,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2023-04-01 18:58:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:58:56,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:56,756 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 17 treesize of output 15 [2023-04-01 18:58:56,758 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 16 treesize of output 12 [2023-04-01 18:58:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444552614] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:56,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 27 [2023-04-01 18:58:56,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433767954] [2023-04-01 18:58:56,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 18:58:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 18:58:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-04-01 18:58:56,801 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 24 states have internal predecessors, (84), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 18:58:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:58,051 INFO L93 Difference]: Finished difference Result 310 states and 353 transitions. [2023-04-01 18:58:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-01 18:58:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 24 states have internal predecessors, (84), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 59 [2023-04-01 18:58:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:58,053 INFO L225 Difference]: With dead ends: 310 [2023-04-01 18:58:58,053 INFO L226 Difference]: Without dead ends: 308 [2023-04-01 18:58:58,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 109 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=3094, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 18:58:58,055 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 116 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:58,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 276 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 18:58:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-04-01 18:58:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 203. [2023-04-01 18:58:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 161 states have (on average 1.1366459627329193) internal successors, (183), 170 states have internal predecessors, (183), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 18:58:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 232 transitions. [2023-04-01 18:58:58,093 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 232 transitions. Word has length 59 [2023-04-01 18:58:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:58,093 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 232 transitions. [2023-04-01 18:58:58,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 24 states have internal predecessors, (84), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 18:58:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 232 transitions. [2023-04-01 18:58:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 18:58:58,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:58,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2023-04-01 18:58:58,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:58,299 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,SelfDestructingSolverStorable17 [2023-04-01 18:58:58,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:58,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2071187321, now seen corresponding path program 3 times [2023-04-01 18:58:58,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:58,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715269838] [2023-04-01 18:58:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:58,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:58,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:58:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:58:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 18:58:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:58,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715269838] [2023-04-01 18:58:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715269838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284511969] [2023-04-01 18:58:58,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:58:58,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:58,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:58,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:58:58,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:58:58,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 18:58:58,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:58:58,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 18:58:58,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:59,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:58:59,044 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 19 treesize of output 18 [2023-04-01 18:58:59,056 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 19 treesize of output 18 [2023-04-01 18:58:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:59,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:59,794 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 27 treesize of output 25 [2023-04-01 18:58:59,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 18:58:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:58:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284511969] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:59,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 33 [2023-04-01 18:58:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311492131] [2023-04-01 18:58:59,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:59,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 18:58:59,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 18:58:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 18:58:59,888 INFO L87 Difference]: Start difference. First operand 203 states and 232 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:59:01,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:04,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:06,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:08,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:10,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:12,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:14,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:16,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:18,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:20,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:22,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:24,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:26,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:28,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:30,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:32,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:34,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:36,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:38,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:40,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:42,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:45,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:47,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:49,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 18:59:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:50,553 INFO L93 Difference]: Finished difference Result 418 states and 493 transitions. [2023-04-01 18:59:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:59:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 59 [2023-04-01 18:59:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:50,556 INFO L225 Difference]: With dead ends: 418 [2023-04-01 18:59:50,556 INFO L226 Difference]: Without dead ends: 360 [2023-04-01 18:59:50,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=827, Invalid=4873, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 18:59:50,558 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 218 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 206 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:50,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 418 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1611 Invalid, 24 Unknown, 0 Unchecked, 49.0s Time] [2023-04-01 18:59:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-04-01 18:59:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 257. [2023-04-01 18:59:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 214 states have internal predecessors, (227), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (38), 25 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-01 18:59:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 304 transitions. [2023-04-01 18:59:50,616 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 304 transitions. Word has length 59 [2023-04-01 18:59:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:50,617 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 304 transitions. [2023-04-01 18:59:50,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 18:59:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 304 transitions. [2023-04-01 18:59:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 18:59:50,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:50,618 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:50,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:50,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:50,823 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:50,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1396273894, now seen corresponding path program 5 times [2023-04-01 18:59:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:50,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306646679] [2023-04-01 18:59:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:59:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:59:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 18:59:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 18:59:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:51,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306646679] [2023-04-01 18:59:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306646679] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889990390] [2023-04-01 18:59:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:59:51,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:51,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:59:51,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:59:51,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-01 18:59:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:51,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 18:59:51,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:51,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:59:51,415 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 19 treesize of output 18 [2023-04-01 18:59:51,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:59:51,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 18:59:52,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:59:52,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2023-04-01 18:59:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:59:52,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:52,808 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 47 treesize of output 41 [2023-04-01 18:59:52,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:59:52,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 50 [2023-04-01 18:59:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:59:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889990390] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:52,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 42 [2023-04-01 18:59:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801298193] [2023-04-01 18:59:52,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:52,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 18:59:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 18:59:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 18:59:52,846 INFO L87 Difference]: Start difference. First operand 257 states and 304 transitions. Second operand has 42 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 40 states have internal predecessors, (111), 14 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-04-01 18:59:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:55,733 INFO L93 Difference]: Finished difference Result 432 states and 510 transitions. [2023-04-01 18:59:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-04-01 18:59:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 40 states have internal predecessors, (111), 14 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 68 [2023-04-01 18:59:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:55,735 INFO L225 Difference]: With dead ends: 432 [2023-04-01 18:59:55,735 INFO L226 Difference]: Without dead ends: 397 [2023-04-01 18:59:55,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 120 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1147, Invalid=9773, Unknown=0, NotChecked=0, Total=10920 [2023-04-01 18:59:55,738 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 255 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:55,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 426 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 18:59:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-04-01 18:59:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 330. [2023-04-01 18:59:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 259 states have (on average 1.111969111969112) internal successors, (288), 270 states have internal predecessors, (288), 50 states have call successors, (50), 24 states have call predecessors, (50), 20 states have return successors, (49), 35 states have call predecessors, (49), 49 states have call successors, (49) [2023-04-01 18:59:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 387 transitions. [2023-04-01 18:59:55,810 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 387 transitions. Word has length 68 [2023-04-01 18:59:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:55,811 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 387 transitions. [2023-04-01 18:59:55,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 40 states have internal predecessors, (111), 14 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-04-01 18:59:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 387 transitions. [2023-04-01 18:59:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 18:59:55,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:55,812 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:55,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:56,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:56,018 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:56,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -992954280, now seen corresponding path program 4 times [2023-04-01 18:59:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802418009] [2023-04-01 18:59:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 18:59:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 18:59:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 18:59:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 18:59:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802418009] [2023-04-01 18:59:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802418009] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708320356] [2023-04-01 18:59:56,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:59:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:56,469 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:59:56,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:59:56,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:59:56,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:56,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:59:56,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:56,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:59:56,680 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 19 treesize of output 18 [2023-04-01 18:59:56,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:59:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:56,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:57,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 18:59:57,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 18:59:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:57,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708320356] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:57,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:57,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 35 [2023-04-01 18:59:57,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354593171] [2023-04-01 18:59:57,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:57,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 18:59:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 18:59:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 18:59:57,188 INFO L87 Difference]: Start difference. First operand 330 states and 387 transitions. Second operand has 35 states, 35 states have (on average 3.142857142857143) internal successors, (110), 34 states have internal predecessors, (110), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 19:00:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:00:00,014 INFO L93 Difference]: Finished difference Result 486 states and 568 transitions. [2023-04-01 19:00:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-01 19:00:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.142857142857143) internal successors, (110), 34 states have internal predecessors, (110), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 68 [2023-04-01 19:00:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:00:00,016 INFO L225 Difference]: With dead ends: 486 [2023-04-01 19:00:00,016 INFO L226 Difference]: Without dead ends: 378 [2023-04-01 19:00:00,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1262, Invalid=8838, Unknown=0, NotChecked=0, Total=10100 [2023-04-01 19:00:00,020 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 265 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 19:00:00,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 349 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 19:00:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-04-01 19:00:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 263. [2023-04-01 19:00:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 206 states have (on average 1.1067961165048543) internal successors, (228), 215 states have internal predecessors, (228), 39 states have call successors, (39), 20 states have call predecessors, (39), 17 states have return successors, (38), 27 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-01 19:00:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 305 transitions. [2023-04-01 19:00:00,087 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 305 transitions. Word has length 68 [2023-04-01 19:00:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:00:00,087 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 305 transitions. [2023-04-01 19:00:00,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.142857142857143) internal successors, (110), 34 states have internal predecessors, (110), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 19:00:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 305 transitions. [2023-04-01 19:00:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 19:00:00,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:00:00,088 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:00:00,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:00:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-04-01 19:00:00,296 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:00:00,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:00:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 442084583, now seen corresponding path program 1 times [2023-04-01 19:00:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:00:00,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776943581] [2023-04-01 19:00:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:00:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:00:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 19:00:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 19:00:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 19:00:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 19:00:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:00:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 19:00:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:00:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:00:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776943581] [2023-04-01 19:00:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776943581] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:00:00,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202630579] [2023-04-01 19:00:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:00,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:00:00,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:00:00,642 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:00:00,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:00:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:00,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 19:00:00,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:00:00,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:00:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:00:01,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:01,433 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 17 treesize of output 15 [2023-04-01 19:00:01,434 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 16 treesize of output 12 [2023-04-01 19:00:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:00:01,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202630579] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:01,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:01,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 30 [2023-04-01 19:00:01,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652436439] [2023-04-01 19:00:01,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:01,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 19:00:01,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 19:00:01,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-04-01 19:00:01,474 INFO L87 Difference]: Start difference. First operand 263 states and 305 transitions. Second operand has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 27 states have internal predecessors, (99), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-01 19:00:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:00:03,468 INFO L93 Difference]: Finished difference Result 520 states and 614 transitions. [2023-04-01 19:00:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-04-01 19:00:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 27 states have internal predecessors, (99), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 77 [2023-04-01 19:00:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:00:03,471 INFO L225 Difference]: With dead ends: 520 [2023-04-01 19:00:03,471 INFO L226 Difference]: Without dead ends: 518 [2023-04-01 19:00:03,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=929, Invalid=7443, Unknown=0, NotChecked=0, Total=8372 [2023-04-01 19:00:03,475 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 239 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:00:03,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 468 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 19:00:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-04-01 19:00:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 399. [2023-04-01 19:00:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 311 states have (on average 1.1157556270096463) internal successors, (347), 331 states have internal predecessors, (347), 66 states have call successors, (66), 24 states have call predecessors, (66), 21 states have return successors, (65), 43 states have call predecessors, (65), 65 states have call successors, (65) [2023-04-01 19:00:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 478 transitions. [2023-04-01 19:00:03,568 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 478 transitions. Word has length 77 [2023-04-01 19:00:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:00:03,568 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 478 transitions. [2023-04-01 19:00:03,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 27 states have internal predecessors, (99), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-01 19:00:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 478 transitions. [2023-04-01 19:00:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 19:00:03,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:00:03,570 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:00:03,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 19:00:03,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-01 19:00:03,778 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:00:03,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:00:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -975556872, now seen corresponding path program 6 times [2023-04-01 19:00:03,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:00:03,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367189477] [2023-04-01 19:00:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:03,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:00:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:00:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 19:00:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 19:00:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 19:00:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 19:00:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:00:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 19:00:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 19:00:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 19:00:04,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:00:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367189477] [2023-04-01 19:00:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367189477] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:00:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676223174] [2023-04-01 19:00:04,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:00:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:00:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:00:04,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:00:04,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:00:04,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-04-01 19:00:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:00:04,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 19:00:04,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:00:04,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:00:04,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 19:00:04,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 19:00:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:00:04,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 19:00:04,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:00:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-01 19:00:04,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:05,127 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 35 treesize of output 33 [2023-04-01 19:00:05,131 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 118 treesize of output 110 [2023-04-01 19:00:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 62 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 19:00:05,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676223174] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:05,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:05,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 36 [2023-04-01 19:00:05,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359125180] [2023-04-01 19:00:05,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:05,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 19:00:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:05,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 19:00:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:00:05,232 INFO L87 Difference]: Start difference. First operand 399 states and 478 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 15 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 19:00:14,977 WARN L223 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:00:17,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 19:00:19,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 19:00:25,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 19:00:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:00:26,167 INFO L93 Difference]: Finished difference Result 707 states and 820 transitions. [2023-04-01 19:00:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-04-01 19:00:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 15 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 86 [2023-04-01 19:00:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:00:26,169 INFO L225 Difference]: With dead ends: 707 [2023-04-01 19:00:26,169 INFO L226 Difference]: Without dead ends: 396 [2023-04-01 19:00:26,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1171, Invalid=6309, Unknown=2, NotChecked=0, Total=7482 [2023-04-01 19:00:26,171 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 709 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 311 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:00:26,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 332 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1157 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 19:00:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-04-01 19:00:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 382. [2023-04-01 19:00:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 303 states have (on average 1.099009900990099) internal successors, (333), 318 states have internal predecessors, (333), 58 states have call successors, (58), 23 states have call predecessors, (58), 20 states have return successors, (57), 40 states have call predecessors, (57), 57 states have call successors, (57) [2023-04-01 19:00:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 448 transitions. [2023-04-01 19:00:26,258 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 448 transitions. Word has length 86 [2023-04-01 19:00:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:00:26,259 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 448 transitions. [2023-04-01 19:00:26,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 15 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 19:00:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 448 transitions. [2023-04-01 19:00:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 19:00:26,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:00:26,262 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:00:26,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 19:00:26,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-01 19:00:26,468 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:00:26,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:00:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash 501406387, now seen corresponding path program 7 times [2023-04-01 19:00:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:00:26,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783579504] [2023-04-01 19:00:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:00:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:00:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 19:00:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:00:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:00:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:00:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-04-01 19:00:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:00:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 19:00:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 19:00:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:00:27,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783579504] [2023-04-01 19:00:27,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783579504] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:00:27,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334723542] [2023-04-01 19:00:27,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:00:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:00:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:00:27,023 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:00:27,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 19:00:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:27,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 19:00:27,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:00:27,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:00:27,235 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 19 treesize of output 18 [2023-04-01 19:00:27,241 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 19 treesize of output 18 [2023-04-01 19:00:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 19:00:27,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:28,223 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 17 treesize of output 15 [2023-04-01 19:00:28,225 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 16 treesize of output 12 [2023-04-01 19:00:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 14 proven. 124 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 19:00:28,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334723542] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:28,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:28,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 19] total 40 [2023-04-01 19:00:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100765299] [2023-04-01 19:00:28,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:28,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:00:28,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:00:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:00:28,262 INFO L87 Difference]: Start difference. First operand 382 states and 448 transitions. Second operand has 40 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 17 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 19:00:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:00:30,978 INFO L93 Difference]: Finished difference Result 503 states and 585 transitions. [2023-04-01 19:00:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-04-01 19:00:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 17 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 91 [2023-04-01 19:00:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:00:30,980 INFO L225 Difference]: With dead ends: 503 [2023-04-01 19:00:30,980 INFO L226 Difference]: Without dead ends: 501 [2023-04-01 19:00:30,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 167 SyntacticMatches, 15 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1131, Invalid=11301, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 19:00:30,982 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 175 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:00:30,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 395 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 19:00:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-04-01 19:00:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 430. [2023-04-01 19:00:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 341 states have (on average 1.096774193548387) internal successors, (374), 358 states have internal predecessors, (374), 66 states have call successors, (66), 25 states have call predecessors, (66), 22 states have return successors, (65), 46 states have call predecessors, (65), 65 states have call successors, (65) [2023-04-01 19:00:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 505 transitions. [2023-04-01 19:00:31,070 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 505 transitions. Word has length 91 [2023-04-01 19:00:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:00:31,071 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 505 transitions. [2023-04-01 19:00:31,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 17 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 19:00:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 505 transitions. [2023-04-01 19:00:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 19:00:31,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:00:31,073 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:00:31,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 19:00:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:00:31,277 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:00:31,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:00:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash -756042637, now seen corresponding path program 5 times [2023-04-01 19:00:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:00:31,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175901437] [2023-04-01 19:00:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:00:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:00:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:00:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 19:00:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:00:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:00:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:00:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-04-01 19:00:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 19:00:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 19:00:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:00:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 19:00:31,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:00:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175901437] [2023-04-01 19:00:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175901437] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:00:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419661084] [2023-04-01 19:00:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:00:31,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:00:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:00:31,847 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:00:31,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 19:00:31,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-04-01 19:00:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:00:31,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 19:00:31,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:00:32,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:00:32,079 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 19 treesize of output 18 [2023-04-01 19:00:32,135 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 19 treesize of output 18 [2023-04-01 19:00:32,152 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 19 treesize of output 18 [2023-04-01 19:00:32,162 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 19 treesize of output 18 [2023-04-01 19:00:32,218 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 19 treesize of output 18 [2023-04-01 19:00:32,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:00:32,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:00:32,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:00:32,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:00:33,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:00:33,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2023-04-01 19:00:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 19:00:33,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:42,186 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_540 Int) (v_ArrVal_537 Int) (v_ArrVal_535 Int)) (or (< v_ArrVal_537 c_main_~CCCELVOL3~0) (let ((.cse0 (let ((.cse1 (* c_main_~i~0 12))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_535) (+ .cse1 |c_main_~#volArray~0.offset|) v_ArrVal_537) (+ .cse1 |c_main_~#volArray~0.offset| 4) v_ArrVal_540)))) (< (select .cse0 (+ |c_main_~#volArray~0.offset| 4)) (+ (select .cse0 (+ |c_main_~#volArray~0.offset| 24)) 1))))) is different from false [2023-04-01 19:00:58,470 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 Int) (v_ArrVal_540 Int) (v_ArrVal_537 Int) (v_ArrVal_535 Int) (v_ArrVal_534 Int)) (or (< v_ArrVal_537 c_main_~CCCELVOL3~0) (let ((.cse0 (let ((.cse1 (* c_main_~i~0 12))) (store (store (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse1 |c_main_~#volArray~0.offset|) v_ArrVal_532) (+ .cse1 |c_main_~#volArray~0.offset| 4) v_ArrVal_534) (+ .cse1 8 |c_main_~#volArray~0.offset|) v_ArrVal_535) (+ .cse1 12 |c_main_~#volArray~0.offset|) v_ArrVal_537) (+ .cse1 16 |c_main_~#volArray~0.offset|) v_ArrVal_540)))) (< (select .cse0 (+ |c_main_~#volArray~0.offset| 4)) (+ (select .cse0 (+ |c_main_~#volArray~0.offset| 24)) 1))))) is different from false [2023-04-01 19:01:04,710 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 127 treesize of output 123 [2023-04-01 19:01:04,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:01:04,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9142 treesize of output 8374 [2023-04-01 19:01:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 101 refuted. 0 times theorem prover too weak. 60 trivial. 4 not checked. [2023-04-01 19:01:04,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419661084] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:01:04,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:01:04,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 23] total 56 [2023-04-01 19:01:04,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440008383] [2023-04-01 19:01:04,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:01:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 19:01:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 19:01:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2638, Unknown=11, NotChecked=210, Total=3080 [2023-04-01 19:01:04,894 INFO L87 Difference]: Start difference. First operand 430 states and 505 transitions. Second operand has 56 states, 56 states have (on average 2.7142857142857144) internal successors, (152), 55 states have internal predecessors, (152), 23 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 19:01:12,324 WARN L223 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 109 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:01:47,081 WARN L223 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 90 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:01:49,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:01:51,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:01:53,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:01:55,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:01:57,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:01:59,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:01,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:03,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:05,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:07,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:09,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:11,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:13,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:25,979 WARN L223 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:02:28,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:30,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:32,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:34,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:36,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:38,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:02:40,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]